• 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:
    Elastic piece of union and alignment (1) of mobile stem (2) to a housing bush (3), used by the brake booster which is a cylindrical body that has a central elastic ring (4) with at least three symmetric clip-on flanges (6) and three symmetric positioner-arms (5) containing the symmetric positioner-arms (5) at least one limiting curvature (9) and a stop edge (12) and containing the symmetrical clip-on tabs (6) at minus a clipping curvature (8). (Machine-translation by Google Translate, not legally binding)
    公开号:ES2757975A1
    申请号:ES201831046
    申请日:2018-10-30
    公开日:2020-04-30
    发明作者:Iker Ibisate；Javier Gordo
    申请人:Rpk Tech Center S Coop；
    IPC主号:
    专利说明:

    [0001]
    [0002] Elastic connecting and aligning part of mobile stem
    [0003]
    [0004] Field of the Invention
    [0005] This invention concerns an elastic piece for connecting and aligning the mobile stem to a housing bush, which is usually used in the automotive sector.
    [0006]
    [0007] State of the prior art
    [0008] At present and as a reference to the state of the art, the use of springs or springs for accommodation in the servomotor (booster) of the stem actuated by the brake pedal is common and known. Thus, this mobile stem is housed inside a bushing and so that the transmission of movement to the piston of the servomotor valve is correct and the stem itself does not undergo deviation, springs or helical springs are used in the cylindrical housing of the bushing for centering the mobile stem. However, in this type of solution, the inclination of the stem is not effective and therefore the tilting of the mobile stem is limited. Consequently, the assembly is more complicated, requiring the help of an operator to place it in the correct position and, during operation, efficiency in the transmission of movement is lost. Furthermore, these types of solutions do not allow an efficient union of the mobile stem with the inside of the bushing, requiring additional parts that make manufacturing and assembly difficult.
    [0009]
    [0010] Another of the known solutions adopted is the use of sponges for centering the mobile stem. In this way, the stem is positioned horizontally for assembly and allows a better fixation while preserving the ability to flex and that there is no malfunction in the transmission of movement from the pedal to the booster valve. However, this solution becomes ineffective the more the stem weighs, causing it to lower and tilt and, consequently, both the assembly and the movement transmission are worse. In addition, with time and with friction residues are generated from the disintegration of this type of material that deteriorate the mechanism and impede the correct and optimal operation of the set. Likewise, this type of solution does not allow the union of the mobile stem with the inside of the bushing.
    [0011]
    [0012] Other parts or elements that have flexible legs or arms for the assembly of the mobile stem with the housing sleeve are also known as connection systems. However, these solutions do not allow rotation of the movable stem since they are threaded or fixed to the housing bush and their configuration provides an excessively wide angle of tilting that can cause alignment problems. Also, since it has less contact surface with both the mobile stem and the housing bushing, it provides less resistance and makes the assembly less efficient, generating undesired gaps in use.
    [0013]
    [0014] On the other hand, there are other types of solutions that, through elastic devices, also fix the mobile stem with the housing sleeve, but due to its specific semicircular geometry and its limited contact points of the mobile stem with the elastic device, they produce a great plastic deformation in certain areas after the assembly of the mobile stem, generating in turn undesired high gaps for the correct operation of the assembly due to the poorly balanced efforts in the insertion and tilting of the mobile stem. Likewise, this type of device requires that the assembly of the mobile stem with the elastic element be carried out in parallel, in-line insertion not being possible, which hinders its correct assembly, therefore increasing costs. Additionally, this solution has the drawback of being able to be extracted from the housing bush in the efforts suffered during the tilting of the mobile stem due to the low strength and number of its contact points.
    [0015]
    [0016] Explanation of the invention and advantages
    [0017] Faced with this state of affairs, the present invention refers to an elastic piece for connecting and aligning a mobile stem to a housing bush, used by the brake booster and applicable to the automotive sector. The elastic connection and alignment piece is made up of a cylindrical body that has a central elastic ring with at least three symmetrical clip flanges and three symmetric positioning arms, containing the symmetric positioning arms with at least one limiting curvature and a stop edge and containing symmetric clipping tabs at least one clipping curvature.
    [0018] This configuration allows to obtain in a single elastic part the reliable union between the housing sleeve and the mobile stem, ensuring the operability of the elastic part without wear due to its cylindrical constitution with flanges and arms along the entire circumference of the mobile stem that Containing sufficient contact points through their curvatures, they will distribute the stresses to which the part is subjected at the moments of insertion and tilting of the mobile stem, balancing them throughout the entire perimeter so as not to suffer undesired deformations. Also, the optimal linear insertion of the mobile stem in the elastic piece and 360 degree rotation are allowed. necessary for the correct positioning of the mobile stem that its external end to the mounting bushing has the brake pedal, which speeds up and lowers the assembly since additional steps and parts are eliminated in the assembly of the servomotor (blooster).
    [0019]
    [0020] Likewise, the unwanted gaps are eliminated by adjusting the elastic union and alignment piece both to the housing sleeve and to the mobile stem by means of the contact points generated in their curvatures.
    [0021]
    [0022] On the other hand, the curvatures ensure on the one hand the elastic insertion by clipping the part in the housing sleeve with the impossibility of removing it, and on the other hand, they also limit the tilting of the mobile stem, allowing a quick and easy recovery of its horizontal position, aligned, for proper operation.
    [0023] Thus, with this configuration we obtain a versatile elastic union and alignment piece that by means of a single piece performs the function of union without removing the mobile stem to the housing sleeve, adjustment without gaps and alignment of the mobile stem
    [0024]
    [0025] Another feature of the invention is that each symmetrical clip flange has at least one anti-extraction clip curvature of the movable stem sphere and of the connecting and aligning elastic part and an alignment clip curvature of the housing sleeve.
    [0026] Thanks to the curvature of clip anti-extraction, it is ensured that the sphere of the mobile stem is inserted with the impossibility of longitudinal extraction, since it will block the sphere through its contact point with it if such extractive force occurs. Likewise, this curvature will prevent the extraction of the elastic piece by acting as an anti-extraction stop against the inner edge of the bush. By means of the alignment clip curvature, it is guaranteed that the mobile stem is located in a horizontal position, thus ensuring the optimal operation of the assembly.
    [0027]
    [0028] Another particularity of the invention is that each symmetric positioning arm has at least one tilting limiting curvature and one alignment limiting curvature. Thanks to the tilting limiting curvature, it is possible to guarantee the desired tilting of 4 degrees of the mobile stem, preventing movement of the stem in more degrees and facilitating its recovery to the horizontal position once the brake is released. By means of the limiting curvature of alignment, it is possible to position the mobile stem horizontally, preventing incorrect deviation and also allowing recovery to its horizontal position.
    [0029] Another feature of the invention is that the symmetric positioning arms and the symmetrical clip tabs are arranged in odd numbers. Due to this configuration, it is achieved that there are always at least three points of contact of the symmetrical clipping tabs with the sphere of the movable stem, optimally balancing the stresses to which the elastic part is subjected at the time of insertion and tilting. of the mobile stem. Due to these contact points, in turn, the clipping of the sphere of the mobile stem is guaranteed in a strong and safe way, in addition to avoiding undesired gaps between the elastic connection and alignment piece and the housing sleeve.
    [0030] This odd arrangement of the symmetrical positioning arms assumes that there will always be at least three points that limit the tilting movement of the movable stem and direct its linear insertion into the assembly.
    [0031] Finally, another characteristic of the invention is that the central elastic ring has a longitudinal opening slot.
    [0032] This longitudinal opening groove facilitates the linear insertion of the sphere of the mobile stem at the time of the assembly of the elastic connecting and aligning part in the housing bush due to its elastic capacity. This central elastic ring once it recovers its original position, inserted the mobile stem, will suppose a second stop to the extraction of the mobile stem.
    [0033]
    [0034] Drawings and references
    [0035] To better understand the nature of the invention, an accompanying arrangement is presented in the accompanying drawings which is merely illustrative and not limiting.
    [0036]
    [0037] Figure 1 shows an exploded view of the elastic connecting and aligning piece (1) of the mobile stem (2) in a housing bushing (3), with the three elements aligned before assembly in the assembly with an arrow indicating the assembly direction to be carried out by means of some type of machinery.
    [0038]
    [0039] Figure 2 shows a longitudinal sectional view once the mobile stem (2) and the connecting and aligning elastic piece (1) are assembled in the housing sleeve (3) in the rest position, that is, when it is not Activate the brake pedal.
    [0040]
    [0041] Figure 3 shows a detailed view in which the contact of the sphere (7) of the mobile stem (2) with the symmetrical clip flange (6) is observed enlarged.
    [0042] Figure 4 shows a view of section A-A indicated in Figure 1, in which the contact of the symmetrical clip flanges (6) with the sphere (7) of the mobile stem (2) is observed.
    [0043]
    [0044] Figure 5 shows a longitudinal sectional view once the mobile stem (2) and the elastic connecting and aligning part (1) are assembled in the housing bush (3) in the activated position, that is, when it is activated the brake pedal.
    [0045]
    [0046] Figure 6 shows an isometric view of the elastic connection and alignment piece (1), in which the clip curvature (8) of the symmetric clip flanges (6) and the limiting curvature (9) of the symmetric positioning arms (5).
    [0047]
    [0048] The following references are indicated in these figures:
    [0049] 1. Elastic joint and alignment piece
    [0050] 2. Moving stem
    [0051] 3. Housing bush
    [0052] 4. Central elastic ring
    [0053] 5. Symmetric positioning arm
    [0054] 6. Symmetric clipping tab
    [0055] 7. Ball stem, movable (2)
    [0056] 8. Clipping Curvature
    [0057] 8.1. Anti-extraction clip bending of the ball (7) of the mobile stem (2) 8.2. Alignment Clip Curvature
    [0058] 9. Limiting curvature
    [0059] 9.1. Tilting limiting curvature
    [0060] 9.2. Alignment limiting curvature
    [0061] 10. Longitudinal opening slot
    [0062] 11. Longitudinal balancing groove
    [0063] 12. Butt edge
    [0064]
    [0065] Presentation of a preferred embodiment
    [0066] With reference to the drawings and references listed above, a preferred arrangement of the object of the invention is illustrated in the attached drawings, referring to an elastic connecting and aligning part (1) of the mobile stem (2) to a housing bush (3 ), of those used in the brake booster and applicable in the automotive sector which is a cylindrical body that has a central elastic ring (4) with at least three symmetrical clip-on tabs (6) and three symmetrical positioning arms (5) containing the symmetric positioning arms (5) at least one limiting curvature (9) and a stop edge (12) and the symmetrical clip tabs (6) containing at least one clip curvature (8).
    [0067]
    [0068] As can be seen in figure 1, the elastic connection and alignment piece (1), the mobile stem (2) and the housing bushing (3) remain aligned before their assembly.
    [0069] Firstly, the mobile stem (2) is inserted into the elastic joint and alignment piece (1) by means of pneumatic or hydraulic equipment and once the pre-assembly of the mobile stem (2) is assembled with the elastic joint and alignment piece (1) it is inserted into the housing bush (3), which allows it to be done manually, without the need for any mechanical means.
    [0070] Thanks to the configuration of the elastic connecting and aligning part (1), a robust union of the housing bush (3) and the mobile stem (2) is achieved, thus ensuring the correct and optimal operation of the device. On the one hand, both the limiting curvature (9) of the symmetric positioning arms (5) and the clipping curvature (8) of the symmetrical clipping flanges (6) cause the stresses generated in the elastic part to be distributed and balanced connection and alignment (1) in the insertion and tilting movements of the mobile stem (2), thus avoiding unwanted deformations. On the other hand, it is possible to insert the mobile stem (2) in a linear way in the elastic union and alignment piece (1) and in turn allows 360-degree rotation of the mobile stem (2), which reduces the assembly costs since the use of additional parts is not necessary.
    [0071]
    [0072] In figure 2, the elastic connection and alignment piece (1) and the mobile stem (2) inserted in the housing bush (3) in the rest position are observed, that is, when the brake pedal is not activated . Because the elastic connecting and aligning piece (1) is adjusted both to the mobile stem (2) and to the housing bushing (3) by means of the contact points generated by the alignment clip curvature (8.2) and the curvature of Extraction clip (8.1) eliminates unwanted clearances.
    [0073]
    [0074] As seen in figure 3, each symmetrical clip flange (6) has at least one anti-extraction clip curvature (8.1) of the sphere (7) of the movable stem (2) and of the elastic piece of union and alignment (1) and an alignment clip curvature (8.2). The anti-extraction clip curvature (8.1) ensures the insertion of the ball (7) of the mobile stem (2) in the housing bush (3), making longitudinal extraction impossible, since the anti-extraction clip curvature (8.1) blocks the step in case of removal of the mobile stem (2). At the same time, the curvature of the anti-extraction clip (8.1) prevents unwanted removal of the elastic connecting and alignment piece (1), while ensuring that the mobile stem (2) is placed in a horizontal position for its correct and optimal operation. .
    [0075]
    [0076] Likewise, in Figure 5 it can be seen that each symmetric positioning arm (5) has at least one tilting limiting curvature (9.1) and a limiting curvature of alignment (9.2). Thanks to the tilting limiting curvature (9.1), the mobile stem (2) is allowed to tilt the desired 4-degree angle, facilitating its horizontal recovery when the brake pedal is not depressed. The limiting curvature of alignment (9.2) ensures that the movable stem (2) is kept in a horizontal position, preventing deviations and in this way the correct operation of the assembly can be carried out.
    [0077]
    [0078] Finally, in figure 6 it can be seen that the symmetric positioning arms (5) and the symmetrical clip tabs (6) are arranged in odd numbers. For this specific execution, the elastic connection and alignment piece (1) is made up of five symmetric positioning arms (5) and five symmetrical clip flanges (6). In this way, as can be seen in figure 4, it is guaranteed that there are always at least three points of contact balancing the efforts generated in the elastic piece of union and alignment in the insertion and tilting of the mobile stem (2). Thanks to these three contact points, a robust and secure clipping of the sphere (7) of the mobile stem (2) is obtained, while avoiding undesired gaps between the elastic connecting and alignment piece (1) and the housing sleeve. (3). Therefore, since the elastic connecting and alignment piece (1) is made up of an odd number of symmetrical positioning arms (5) and symmetrical clip flanges (6), it is guaranteed that there are always at least three contact points that limit the tilting of the mobile stem (2) and allow its linear insertion in the housing bush (3).
    [0079]
    [0080] On the other hand, it is observed that the central elastic ring (4) has a longitudinal opening slot (10). Thanks to the elasticity of the longitudinal opening slot (10), the insertion of the sphere (7) of the mobile stem (2) is facilitated. Likewise, once the central elastic ring (4) recovers its original position, it acts as a stop for the extraction of the mobile stem (2).
    [0081]
    [0082] It is also observed that the symmetrical positioning arms (5) have a longitudinal balancing groove (11). Due to the configuration of the longitudinal balancing grooves (11) of the symmetrical clip flanges (6) and of the symmetrical positioning arms (5) together with the longitudinal opening groove (10), a balance of the forces is achieved in the insertion and tilting action of the mobile stem (2) preventing undesired overstrain in the area of the central elastic ring (4) and ensuring that the latter has distributed the efforts, avoiding the deformation of the elastic connecting and alignment piece (1) and in Particular of the central elastic ring (4).
    [0083] After various tests carried out, thanks to the elasticity of the central elastic ring (4) the required clearance of 0.1 mm is guaranteed. Likewise, the total deformation of the elastic union and alignment piece (1) is reduced by 50% and most importantly, the clearance or play of the assembly is reduced to a minimum. Additionally, the insertion of the mobile stem (2) in the elastic union and alignment piece (1) is simple and can be carried out with a linear movement of the mobile stem (2) with a calculated load of 650 N and although this load makes it necessary pneumatic or hydraulic equipment is simple and inexpensive. Once the mobile stem preassembly (2) and the connecting and aligning elastic part (1) have been assembled, its assembly in the housing bush (3) is performed linearly again with an estimated load of 50N, which allows it to be carried out in a manual, without using any mechanical means.
    [0084]
    [0085] The essential nature of this invention is not altered by variations in materials, shape, size and arrangement of the component elements, described in a non-limiting manner, this being sufficient to proceed with its reproduction by an expert.
    权利要求:
    Claims (5)
    [1]
    1a.- Elastic connecting and alignment part (1) of the mobile stem (2) to a housing bush (3), used by the brake booster, characterized in that it is a cylindrical body that has a central elastic ring (4) with at least three symmetrical clipping tabs (6) and three symmetric positioning arms (5) containing the symmetric positioning arms (5) at least one limiting curvature (9) and a stop edge (12) and containing the symmetrical clipping tabs ( 6) at least one clip bending (8).
    [2]
    2a.- Elastic union and alignment piece (1) according to the preceding claim, characterized in that each symmetrical clip flange (6) has at least one anti-extraction clip curvature (8.1) of the sphere (7) of the mobile stem ( 2) and of the connecting and alignment elastic piece (1) and of an alignment clip curvature (8.2).
    [3]
    3 a.- Elastic connection and alignment piece (1) according to any of the preceding claims, characterized in that each symmetrical positioning arm (5) has at least one tilting limiting curvature (9.1) and one limiting limiting curvature (9.2) .
    [4]
    4 a.- Elastic union and alignment piece (1) according to any of the previous claims, characterized in that the symmetric positioning arms (5) and the symmetrical clip flanges (6) are arranged in an odd number.
    [5]
    5 a.- Elastic connection and alignment piece (1) according to any of the previous claims, characterized in that the central elastic ring (4) has a longitudinal opening slot (10).
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    同族专利:
    公开号 | 公开日
    ES2757975B2|2020-07-17|
    引用文献:
    公开号 | 申请日 | 公开日 | 申请人 | 专利标题
    US4831916A|1987-06-01|1989-05-23|Leigh Monstevens Keith V|Piston assembly|
    FR2841945A1|2002-07-04|2004-01-09|Bosch Gmbh Robert|Ball joint for master cylinder comprises male part provided with ball and female piston cavity receiving ball, cap with elastic narrowing and tongues retaining ball at bottom of cavity|
    JP2016013721A|2014-06-30|2016-01-28|日信工業株式会社|Input device and brake system|
    法律状态:
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    优先权:
    申请号 | 申请日 | 专利标题
    ES201831046A|ES2757975B2|2018-10-30|2018-10-30|Elastic connecting and aligning part of mobile stem|ES201831046A| ES2757975B2|2018-10-30|2018-10-30|Elastic connecting and aligning part of mobile stem|
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