• 专利附录
  • 专利说明
  • 权利要求
  • 类似技术
  • 同族专利
  • 引用文献
  • 法律状态
  • 优先权
    • 专利摘要:
    Transport vehicle to raise and lower loads through stairs, formed by a chassis (2) that has a set of wheels (3a, 3b) that allow a horizontal movement (dh) of the vehicle ( 1) on a horizontal surface (sh). Said vehicle (1) comprises a set of rotating mechanical parts (10a, 10b) joined to said chassis (2), where each of them has a contour (11) curved not circular about its axis of rotation (z), whose rotary movement (ω) on the horizontal surface (sh) produces a horizontal displacement (dh) and a vertical displacement (dv) ) of the vehicle (1). (Machine-translation by Google Translate, not legally binding)
    公开号:ES2615158A1
    申请号:ES201730559
    申请日:2017-03-31
    公开日:2017-06-05
    发明作者:Miquel LLABRÉS VIDAL
    申请人:Miquel LLABRÉS VIDAL；
    IPC主号:
    专利说明:

    TRANSPORT VEHICLE TO RAISE AND LOWER LOADS THROUGH STAIRS AND ROTATING MECHANICAL PART ASSOCIATED WITH THE SAME

    DESCRIPTION
     5
    Field of the Invention
    The present invention relates to a transport vehicle for raising and lowering loads through stairs using minimal effort, as well as a rotating mechanical part specially designed to allow said actions in transport vehicles such as wheelbarrows or the like, among others. 10

    Background of the invention
    Currently, various types of transport vehicles are known that allow loading and unloading of loads or other objects through stairs.
     fifteen
    Among the simplest are the manual trucks, usually equipped with a support structure that acts as a chassis or frame on which the load or object to be transported is arranged, and at the bottom of which it has a set of wheels that allow displacement horizontal of the vehicle when it is dragged or pushed by the user on a horizontal surface. However, when said vehicle has to face a stepped unevenness, the user must considerably increase the force exerted on it so that it moves both horizontally and vertically, in order to overcome said unevenness.

    The motorized trucks allow to reduce the force exerted by the user when carrying out this type of actions. Document ES2169636A1 shows an example of this type of truck, in which a set of driving wheels formed by three wheels arranged in a star on each side of the chassis is also used. These wheels are those used both to move the truck on a flat surface, and to assist it when it goes up or down the ladder. 30

    In spite of the advantages of these motorized trucks, as far as the reduction of the force exerted by the user is concerned, these usually present quite complex displacement mechanisms (understood as the set formed by the driving wheels and the transmission elements). Also, since the wheels 35
    The drives are also used to move the vehicle horizontally, or on flat surfaces, they must necessarily have the circular contour of a wheel. Therefore, at the same time that said circular contour favors the horizontal displacement of the vehicle, it also hinders its vertical displacement when the vehicle goes up and down a ladder. In particular, given the circular character of the wheels, they tend to skate in situations of excessive load or due to adhesion problems. On the other hand, if these same wheels are accidentally disengaged from the transmission mechanism, their circular nature can cause the vehicle to fall down the stairs.
     10
    The present invention solves the above problems by means of a transport vehicle having a set of wheels that are used exclusively for the movement of the vehicle on flat surfaces, together with a set of rotating non-circular curved mechanical parts that are used only in the moment when he has to go up or down a ladder. In which, in addition, the rotating movement of said parts simultaneously produces a smooth and uniform horizontal and vertical movement of the vehicle, which does not transmit vibrations, which does not produce shocks and which implies minimal effort.

    Description of the invention
    According to a first protection object, the present invention relates to a transport vehicle for raising and lowering loads through stairs, formed by a chassis that has a set of wheels that allow a horizontal movement of the vehicle on a horizontal surface .
     25
    Said vehicle is characterized in that it comprises a set of rotating mechanical parts attached to said chassis, where each one has a non-circular curved contour around its axis of rotation, whose rotating movement on the horizontal surface produces a horizontal displacement and a displacement vertical of the vehicle that reduces the effort on the part of the user, both when climbing and 30 when lowering the vehicle by stairs. In addition, the non-circular nature of these rotating mechanical parts also favors their grip on the stairs, preventing them from skating when climbing or lowering them.
    Preferably, each rotating mechanical part has a substantially "S" or elongated "S" shape, which allows a greater moment of force to be transmitted over the 35
    stairs.

    To assist the user when the vehicle goes up or down the stairs, the rotating mechanical parts receive their rotating movement from a drive shaft driven by an electric motor. Preferably, said electric motor has its own power battery for autonomous operation, resulting in a more versatile and functional vehicle.

    On the other hand, the transmission shaft is attached to the chassis by means of a set of bearings that allow its rotation according to the axis of rotation of the rotating mechanical parts 10. Likewise, preferably, the electric motor transmits its movement to said transmission shaft by means of a transmission chain that meshes a transmission pinion of the electric motor with a cogwheel integral with the transmission shaft. In turn, to avoid lateral displacement of the transmission shaft along the axis of rotation of the rotating mechanical parts, it comprises a set of 15 spacers that abut the bearing set to prevent lateral displacement of the transmission axis. along said axis of rotation.

    Preferably, the chassis comprises a support bed for the arrangement of the electric motor, and a control assembly for the activation of the electric motor by the user.

    The wheelset has a relative movement with respect to the set of rotating mechanical parts, which allows the said set of wheels to be approached or separated from said set of rotating mechanical parts, allowing said vehicle to adopt two functional positions. A first position in which the wheelset overlaps with the set of rotating mechanical parts to prevent its rotating movement, allowing only the horizontal movement of the vehicle. And a second position in which the wheel set is separated from the set of rotating mechanical parts to allow its rotating movement, allowing both horizontal displacement 30 and vertical displacement of the vehicle. Preferably, the relative movement of the wheelset with respect to the set of rotating mechanical parts is produced by sliding said wheelset on the chassis.
     35
    In turn, the chassis has a structural configuration specially designed to provide greater functionality to the vehicle, greater constructive simplicity, and greater ease of use by the user. For this, preferably, the chassis comprises:
     5
    - a tubular structure in whose lower part the set of rotating mechanical parts is arranged, and in whose upper part there is a handle for dragging the vehicle;
    - a loading platform that extends perpendicular to the tubular structure; 10
    - a first bar, perpendicular to the loading platform, on which a first wheel of the first set of wheels is arranged; Y
    - a second bar, perpendicular to the loading platform, on which a second wheel of the first set of wheels is arranged.
     fifteen
    Preferably, the first wheel is attached to the first bar by a first connecting element that allows the first wheel to slide along the first bar, while the second wheel is attached to the second bar by a second element of union that allows the sliding of the second wheel along the second bar. twenty

    Preferably, the first connecting element comprises a first bolt which allows it to be pressed against the first bar to block the sliding of the first wheel, and to enable said sliding when the pressure exerted by the first bolt on the first bar is released, while The second connecting element 25 comprises a second bolt which allows it to be pressed against the second bar to block the sliding of the second wheel, and to enable said sliding when the pressure exerted by the second bolt on the second bar is released.

    To facilitate the change of position of the wheel set, preferably the first bar and the second bar are arranged in parallel, perpendicular to the drive shaft, connected to the tubular structure.

    The contour of each rotating mechanical part is described in more detail below, according to a preferred embodiment thereof. 35
    Said contour is formed by:
    - a first convex section, which extends from a first end opposite the axis of rotation to a first intermediate point near it;
    - a second concave section, which extends from the first intermediate point to a first inflection point; 5
    - a third convex section, which extends from the first turning point to a second end opposite the first end;
    - a fourth convex section, which extends from the second end to a second intermediate point opposite the first intermediate point;
    - a fifth concave section, which extends from the second intermediate point to a second inflection point; Y
    - a sixth convex section, which extends from the second point of inflection to the first end.

    Also, to increase the adhesion of the rotating mechanical parts on the surface of the stairs, preferably the contour comprises a toothed profile.

    According to a second protection object, the present invention relates to a rotating mechanical part for transport vehicles such as trucks or the like, among others. twenty

    Said rotating mechanical part is characterized in that it comprises a non-circular curved contour around its axis of rotation, whose rotating movement on a horizontal surface produces a horizontal displacement and a vertical displacement of the vehicle. 25

    Preferably, the contour of the rotating mechanical part is formed by:
    - a first convex section, which extends from a first end opposite the axis of rotation to a first intermediate point near it;
    - a second concave section, which extends from the first intermediate point to a first inflection point;
    - a third convex section, which extends from the first turning point to a second end opposite the first end;
    - a fourth convex section, which extends from the second end to a second intermediate point opposite the first intermediate point; 35
    - a fifth concave section, which extends from the second intermediate point to a second inflection point; Y
    - a sixth convex section, which extends from the second point of inflection to the first end.
     5
    Also, to increase the adhesion of the rotating mechanical parts on the surface of the stairs, preferably the contour comprises a toothed profile.

    Brief description of the drawings
    Next, a series of drawings that help to better understand the invention and that expressly relate to an embodiment of said invention which is presented as a non-limiting example thereof is described very briefly.

    Figure 1 shows a perspective view of the transport vehicle of the present invention in the first position, showing the overlapping wheelset with the set of rotating mechanical parts.

    Figure 2 shows a perspective view of the transport vehicle of the present invention in the second position, showing the wheel set separated from the set 20 of rotating mechanical parts.

    Figure 3 shows a top perspective view of the transport vehicle of Figure 2.
     25
    Figure 4 shows a front perspective view of the transport vehicle of Figure 2.

    Figure 5 shows a side perspective view of the transport vehicle of Figure 2. 30

    Figure 6 shows a detailed view corresponding to one of the ends of the drive shaft.

    Figure 7 shows a first view corresponding to a sequence of 35
    operation of the vehicle of the present invention when climbing a ladder.

    Figure 8 shows a second view corresponding to a sequence of operation of the vehicle of the present invention when climbing a ladder.
     5
    Figure 9 shows a perspective view of the rotating mechanical part of the present invention.

    Detailed description of the invention
    Figure 1 shows a perspective view of the transport vehicle (1) for raising and lowering loads through stairs of the present invention in the first position (A), showing the wheelset (3a, 3b) overlaid with the set of rotating mechanical parts (10a, 10b) to prevent its rotating movement (ω), allowing only horizontal displacement (dH) of the vehicle (1).
     fifteen
    Therefore, the first position (A) is specially adapted to allow the horizontal movement of the vehicle (1), or on any flat surface in general, either horizontal or inclined.

    Figure 2 shows a perspective view of the transport vehicle for raising and lowering loads through stairs of the present invention in the second position (B), showing the wheel set (3a, 3b) separated from the set of mechanical parts swivels (10a, 10b) to allow its rotational movement (ω), allowing both horizontal displacement (dH) and vertical displacement (dV) of the vehicle (1).
     25
    Therefore, the second position (B) is specially adapted to allow the movement of the vehicle (1) through stairs, or on any general stepped surface or that presents obstacles and / or irregularities thereon.
     30
    Figures 3-5 show respectively a top view, a front view and a side perspective view of the transport vehicle (1) in the position of going up or down stairs.

    As can be seen in Figures 1-5, according to the present example of
    embodiment the vehicle consists of a transport truck formed by a chassis (2) that has a set of wheels (3a, 3b) that allow a horizontal displacement (dH) of the vehicle (1) on a horizontal surface (SH).

    As can be seen, said vehicle (1) comprises a set of rotating mechanical parts 5 (10a, 10b) attached to said chassis (2), where each of them has a curved contour (11) not circular around its axis of turn (Z), whose rotating movement (ω) on the horizontal surface (SH) produces a horizontal displacement (dH) and a vertical displacement (dV) of the vehicle (1) that reduces the effort on the part of the user, both when climbing and when lowering the vehicle by stairs, figures 7 and 8 10

    Each rotating mechanical part (10a, 10b) has a substantially "S", or "S" shape, which allows a greater moment of force to be transmitted on the stairs. To assist the user when the vehicle (1) goes up or down the stairs, the rotating mechanical parts (10a, 10b) receive their rotating movement (ω) of a 15-axis transmission (4) driven by an electric motor (5) .

    On the other hand, the drive shaft (4) is connected to the chassis (2) by means of a set of bearings (6a, 6b) that allow its rotation according to the axis of rotation of the rotating mechanical parts (10a, 10b). Likewise, the electric motor (5) transmits its movement to said transmission shaft (4) by means of a transmission chain (7) that meshes a transmission pinion (8) of the electric motor (5) with a cogwheel (9) in solidarity with the drive shaft (4).

    The chassis (2) comprises a support bed (25) for the arrangement of the electric motor 25 (5), and a control assembly (26) for the activation of the electric motor (5) by the user.

    The wheel set (3a, 3b) has a relative movement (MR) with respect to the set of rotating mechanical parts (10a, 10b), which makes it possible to approach or separate said set of 30 wheels (3a, 3b) with respect to said set of parts rotating mechanics (10a, 10b), allowing said vehicle (1) to adopt the first position (A) and the second position (B).

    According to the present example, the relative movement (MR) of the wheelset (3a, 35
    3b) with respect to the set of rotating mechanical parts (10a, 10b) is produced by sliding said set of wheels (3a, 3b) on the chassis (2).

    In turn, the chassis (2) comprises:
    - a tubular structure (20) in whose lower part (20I) the set of rotating mechanical parts (10a, 10b) is arranged, and in whose upper part (20S) there is a handle (21) for dragging the vehicle (1 );
    - a loading platform (22) that extends perpendicularly from the tubular structure (20);
    - a first bar (23a), perpendicular to the loading platform (22), on which a first wheel (3a) of the first set of wheels (3a, 3b) is arranged; Y
    - a second bar (23b), perpendicular to the loading platform (22), on which a second wheel (3b) of the first set of wheels (3a, 3b) is arranged.

    The first wheel (3a) is attached to the first bar (23a) by means of a first connecting element (24a) that allows the first wheel (3a) to slide along the first bar (23a), while The second wheel (3b) is attached to the second bar (23b) by a second connecting element (24b) that allows the sliding of the second wheel (3b) along the second bar (23b). twenty

    The first connecting element (24a) comprises a first bolt (27a) that allows it to be pressed against the first bar (23a) to block the sliding of the first wheel (3a), and enable said sliding when the pressure exerted by the first bolt (27a) on the first bar (23a), while the second connecting element (24b) comprises a second bolt (27b) which allows it to be pressed against the second bar (23b) to block the sliding of the second wheel (3b), and enable said sliding when the pressure exerted by the second bolt (27b) on the second bar (23b) is released.
     30
    To facilitate the change of position of the wheelset (3a, 3b), the first bar (23a) and the second bar (23b) are arranged in parallel, perpendicular to the drive shaft (4), attached to the tubular structure ( twenty).

    Figure 6 shows a detailed view corresponding to one of the ends of the axis 35
    of transmission (4). As can be seen, in order to avoid the lateral displacement of the transmission shaft (4) along the axis of rotation of the rotating mechanical parts (10a, 10b), it comprises a set of spacers (41a, 41b) that abut with the bearing set (6a, 6b) to prevent lateral displacement of the drive shaft (4) along said axis of rotation (Z). According to the present example, said separators (41a, 41b) adopt a cylindrical or bushing shape.

    Figure 7 shows a first view corresponding to a sequence of operation of the vehicle (1), just at the moment when it begins to climb a ladder. 10

    Figure 8 shows a second view corresponding to a sequence of operation of the vehicle (1), going up one of the steps.

    Figure 9 shows a perspective view of the rotating mechanical part (10a, 10b) 15 of the present invention. As can be seen, said rotating mechanical part (10a, 10b) comprises a non-circular curved contour (11) around its axis of rotation (Z), whose rotating movement (ω) on a horizontal surface (SH) produces a horizontal displacement (dH) and a vertical displacement (dV) of the vehicle (1).
     twenty
    The contour (11) of the rotating mechanical part (10a, 10b) is formed by:
    - a first convex section (11a), which extends from a first end (E1) opposite the axis of rotation (Z) to a first intermediate point (P1) close thereto;
    - a second concave section (11b), which extends from the first intermediate point (P1) to a first inflection point (P2); 25
    - a third convex section (11c), which extends from the first inflection point (P2) to a second end (E2) opposite the first end (E1);
    - a fourth section (11d) convex, which extends from the second end (E2) to a second intermediate point (P3) opposite the first intermediate point (P1);
    - a fifth concave section (11e), which extends from the second intermediate point 30 (P3) to a second inflection point (P4); Y
    - a sixth section (11f) convex, which extends from the second inflection point (P4) to the first end (E1).

    Also, to increase the adhesion of rotating mechanical parts (10a, 35
    10b) on the surface of the stairs, preferably the contour (11) comprises a toothed profile (12).
    权利要求:
    Claims (18)
    [1]

    1. Transport vehicle to raise and lower loads through stairs, formed by a chassis (2) that has a set of wheels (3a, 3b) that allow a horizontal displacement (dH) of the vehicle (1) on a horizontal surface (SH), 5 said vehicle (1) characterized in that it comprises a set of rotating mechanical parts (10a, 10b) attached to said chassis (2), where each of them has a curved non-circular contour (11) around its axis of rotation (Z), whose rotating movement (ω) on the horizontal surface (SH) produces a horizontal displacement (dH) and a vertical displacement (dV) of the vehicle (1). 10

    [2]
    2. Transport vehicle for raising and lowering loads through stairs according to claim 1, characterized in that each rotating mechanical part (10a, 10b) has an "S" shape.
     fifteen
    [3]
    3. Transport vehicle for raising and lowering loads through stairs according to any of claims 1 to 2, characterized in that the rotating mechanical parts (10a, 10b) receive their rotary movement (ω) of a transmission shaft (4) driven by an electric motor (5).
     twenty
    [4]
    4. Transport vehicle for raising and lowering loads through stairs according to claim 3, characterized in that the transmission shaft (4) is connected to the chassis (2) by means of a set of bearings (6a, 6b) that enable its rotation along the axis of rotation (Z); and because the electric motor (5) transmits its movement to said transmission shaft (4) by means of a transmission chain (7) that meshes a transmission pinion (8) of the electric motor (5) with a cogwheel (9 ) attached to the drive shaft (4).

    [5]
    5. Transport vehicle for raising and lowering loads through stairs according to claim 4, characterized in that the transmission shaft (4) comprises a set 30 of spacers (41a, 41b) that abut the bearing set (6a , 6b) to prevent lateral displacement of the drive shaft (4) along the axis of rotation (Z).

    [6]
    6. Transport vehicle for raising and lowering loads through stairs according to any of claims 3 to 5, characterized in that the chassis (2) 35
    It comprises a support bench (25) for arrangement of the electric motor (5).

    [7]
    7. Transport vehicle for raising and lowering loads through stairs according to claims 3 to 6, characterized in that the chassis (2) comprises a control assembly (26) for activating the electric motor (5). 5

    [8]
    8. Transport vehicle for raising and lowering loads through stairs according to any of claims 1 to 7, characterized in that the wheel set (3a, 3b) has a relative movement (MR) with respect to the set of rotating mechanical parts ( 10a, 10b), which allows to approach or separate said set of wheels (3a, 3b) 10 with respect to said set of rotating mechanical parts (10a, 10b), allowing to adopt said vehicle (1):
    - a first position (A) in which the wheel set (3a, 3b) overlaps with the set of rotating mechanical parts (10a, 10b) to prevent its rotating movement (ω), allowing only horizontal displacement (dH) of the vehicle (1); and 15
    - a second position (B) in which the wheel set (3a, 3b) is separated from the set of rotating mechanical parts (10a, 10b) to allow its rotating movement (ω), allowing both horizontal displacement (dH) and the vertical displacement (dV) of the vehicle (1).
     twenty
    [9]
    9. Transport vehicle for raising and lowering loads through stairs according to claim 8, characterized in that the relative movement (MR) of the wheel set (3a, 3b) with respect to the set of rotating mechanical parts (10a, 10b) is produced by sliding said wheelset (3a, 3b) on the chassis (2). 25

    [10]
    10. Transport vehicle for raising and lowering loads through stairs according to any of claims 1 to 9, characterized in that the chassis (2) comprises:
    - a tubular structure (20) in whose lower part (20I) the set of rotating mechanical parts (10a, 10b) is arranged, and in whose upper part (20S) there is a handle (21) for dragging the vehicle (1 );
    - a loading platform (22) that extends perpendicularly from the tubular structure (20);
    - a first bar (23a), perpendicular to the loading platform (22), on which
    it has a first wheel (3a) of the first set of wheels (3a, 3b); Y
    - a second bar (23b), perpendicular to the loading platform (22), on which a second wheel (3b) of the first set of wheels (3a, 3b) is arranged.

    [11]
    11. Transport vehicle for raising and lowering loads through stairs according to claim 10, characterized in that the first wheel (3a) is connected to the first bar (23a) by means of a first connecting element (24a) that allows the sliding of the first wheel (3a) along the first bar (23a); and because the second wheel (3b) is connected to the second bar (23b) by a second connecting element (24b) that allows the sliding of the second wheel 10 (3b) along the second bar (23b) .

    [12]
    12. Transport vehicle for raising and lowering loads through stairs according to claim 11 characterized in that the first connecting element (24a) comprises a first bolt (27a) which allows it to be pressed against the first bar (23a) for block the sliding of the first wheel (3a), and enable said sliding when the pressure exerted by the first bolt (27a) on the first bar (23a) is released; and because the second connecting element (24b) comprises a second bolt (27b) that allows it to be pressed against the second bar (23b) to block the sliding of the second wheel (3b), and to enable said sliding when it is released the pressure exerted by the second bolt (27b) on the second bar (23b).

    [13]
    13. Transport vehicle for raising and lowering loads through stairs according to claims 3 and 11, characterized in that the first bar (23a) and the second bar (23b) are arranged in parallel, perpendicular to the transmission axis ( 4), attached to the tubular structure (20).

    [14]
    14. Transport vehicle for raising and lowering loads through stairs according to any of claims 1 to 13, characterized in that the contour (11) of each rotating mechanical part (10a, 10b) is formed by:
    - a first convex section (11a), which extends from a first end (E1) opposite the axis of rotation (Z) to a first intermediate point (P1) close thereto;
    - a second concave section (11b), which extends from the first intermediate point (P1) to a first inflection point (P2); 35
    - a third convex section (11c), which extends from the first inflection point (P2) to a second end (E2) opposite the first end (E1);
    - a fourth section (11d) convex, which extends from the second end (E2) to a second intermediate point (P3) opposite the first intermediate point (P1);
    - a fifth concave section (11e), which extends from the second intermediate point 5 (P3) to a second inflection point (P4); Y
    - a sixth section (11f) convex, which extends from the second inflection point (P4) to the first end (E1).

    [15]
    15. Transport vehicle for raising and lowering loads through stairs according to any one of claims 1 to 14, characterized in that the contour (11) comprises a toothed profile (12).

    [16]
    16. Rotating mechanical part (10a, 10b) for transport vehicles, characterized in that it comprises a non-circular curved contour (11) around its axis of rotation 15 (Z), whose rotational movement (ω) on a horizontal surface (SH ) produces a horizontal displacement (dH) and a vertical displacement (dV) of the vehicle (1).

    [17]
    17. Rotating mechanical part (10a, 10b) for transport vehicles according to claim 16, characterized in that the contour (11) of the rotating mechanical part 20 (10a, 10b) is formed by:
    - a first convex section (11a), which extends from a first end (E1) opposite the axis of rotation (Z) to a first intermediate point (P1) close thereto;
    - a second concave section (11b), which extends from the first intermediate point (P1) to a first inflection point (P2); 25
    - a third convex section (11c), which extends from the first inflection point (P2) to a second end (E2) opposite the first end (E1);
    - a fourth section (11d) convex, which extends from the second end (E2) to a second intermediate point (P3) opposite the first intermediate point (P1);
    - a fifth concave section (11e), which extends from the second intermediate point 30 (P3) to a second inflection point (P4); Y
    - a sixth section (11f) convex, which extends from the second inflection point (P4) to the first end (E1).

    [18]
    18. Rotating mechanical part (10a, 10b) for transport vehicles according to any 35
    of claims 16 to 17, characterized in that the contour (11) comprises a toothed profile (12).
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    同族专利:
    公开号 | 公开日
    ES2615158B1|2018-02-19|
    引用文献:
    公开号 | 申请日 | 公开日 | 申请人 | 专利标题
    JPH07137638A|1993-03-08|1995-05-30|Kuramoto Seisakusho:Kk|Step difference elevator|
    EP0800977A2|1996-04-11|1997-10-15|Alber Antriebstechnik GmbH|Transportation device with motor driven stair climbing device|
    US20040188960A1|2003-03-04|2004-09-30|Jochum Bierma|Stair-climbing hand truck|
    ES2364284T3|2006-05-03|2011-08-30|Aat Alber Antriebstechnik Gmbh|TRANSPORTATION DEVICE WITH STAIR UPLOAD DEVICE OPERATED WITH ELECTRIC MOTOR.|
    法律状态:
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    ES201730559A|ES2615158B1|2017-03-31|2017-03-31|TRANSPORT VEHICLE TO RAISE AND LOWER LOADS THROUGH STAIRS AND ROTATING MECHANICAL PART ASSOCIATED WITH THE SAME|ES201730559A| ES2615158B1|2017-03-31|2017-03-31|TRANSPORT VEHICLE TO RAISE AND LOWER LOADS THROUGH STAIRS AND ROTATING MECHANICAL PART ASSOCIATED WITH THE SAME|
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