• 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:
    The invention relates to a chuck with a chuck body (2) having a chuck axis (7) to which is associated an adjustable clamping means (8) along an actuating means (11) along the chuck axis (7) and a plurality of chucking segments (3) by the clamping means (8) radially adjustable inner clamping surfaces (6) and outer clamping surfaces (5). The clamping means (8) consists of several parts of a mandrel (9) and a coaxial with the mandrel (9) arranged clamping sleeve (10). The actuating means (11) is provided for the opposite adjustment of the mandrel (9) relative to the clamping sleeve (10).
    公开号:CH708568B1
    申请号:CH01235/14
    申请日:2014-08-18
    公开日:2018-02-28
    发明作者:Derheim Waldemar；Schygulla Manfred；Casafina Damiano
    申请人:Roehm Gmbh；
    IPC主号:
    专利说明:

    Description: The invention relates to a chuck with a chuck body having a chuck axis, to which a clamping means adjustable by an actuating means along the chuck axis is assigned, and with a plurality of clamping segments with radially adjustable internal clamping surfaces and external clamping surfaces.
    Such chucks were manufactured and sold, for example, by FN Niederhauser AG under the name Ottet and are suitable for clamping a workpiece to be clamped through the clamping segments. Tools that have a hollow shaft, for example, can be clamped on the inner circumference of the inner clamping surfaces. The outer clamping surfaces allow tools to be clamped on their outer circumference, these external clamping surfaces usually also being one-dimensional clamping lines. With these chucks, however, it has proven to be extremely disadvantageous that when changing between an external clamping, in which the external clamping surfaces of the clamping segments are clamped by the clamping device, and an internal clamping, in which the internal clamping surfaces are spread by the clamping device, the clamping device must first be replaced , For this purpose, the chuck has to be partially disassembled in order to be able to replace the clamping device accommodated in the chuck body. In particular, the clamping segments must also be dismantled, which leads to very long set-up times.
    The present invention is therefore based on the object to reduce the disadvantages mentioned above.
    This object is achieved according to the invention in a chuck of the type mentioned in that the clamping means is formed in several parts from a mandrel and a clamping sleeve arranged coaxially to the mandrel, and that the actuating means is provided for opposing adjustment of the mandrel relative to the clamping sleeve. This ensures that the clamping device can be used both for external clamping and for internal clamping of the clamping segments without having to replace the clamping device. The opposing adjustment of the mandrel relative to the clamping sleeve ensures that only that part of the clamping means which interacts with the external or internal clamping interacts with the clamping segments.
    It has proven to be particularly advantageous if the clamping segments are each assigned at least one clamping tooth with a clamping surface and with an expanding surface. By means of the clamping teeth, the internal clamping surfaces and external clamping surfaces assigned to the clamping segments can easily be adjusted radially through the interaction with the clamping mandrel and the clamping sleeve. The clamping surface and the spreading surface, which are assigned to a clamping segment, preferably each have a cone segment-shaped shape. It has also proven particularly useful if the clamping surfaces are not oriented parallel to the spreading surfaces. Different designs are also provided within the scope of the invention, for example inclined surfaces.
    To improve the power transmission, it has also proven to be advantageous if the mandrel is assigned a spreading geometry corresponding to the spreading surface, and if the clamping sleeve is assigned a clamping geometry corresponding to the clamping surface. The mandrel is thus adjusted during internal clamping against the spreading surfaces formed on the clamping teeth. Due to the simultaneous counter-adjustment of the clamping sleeve, which is removed from the clamping surfaces formed on the clamping teeth, the internal clamping surfaces are adjusted radially outwards. In the case of external clamping, however, the clamping sleeve is adjusted axially in the direction of the clamping segments and acts with the clamping geometry on the clamping surfaces formed on the clamping teeth of the clamping segments. At the same time, due to the opposing adjustment of the mandrel along the chuck axis, the expansion geometry formed on the mandrel is withdrawn from the expansion surfaces. As a result, the outside clamping surfaces now come into contact with the workpiece to be clamped.
    It has also proven to be advantageous if the actuating means is formed as an actuating rod that is axially adjustable along the chuck axis. The axial adjustment of the clamping means along the chuck axis can thus be achieved in a simple manner. It has also proven to be advantageous in the context of the invention if a linear drive, in particular a linear motor, is provided for adjusting the actuating rod, which linear actuator can be connected to the actuating rod, for example, by means of a thread. It has also proven to be particularly favorable here if the actuating rod is assigned a balance beam which is in engagement with the mandrel and with the clamping sleeve. The balance beam can be used to easily adjust the mandrel and the clamping sleeve in opposite directions. If the actuating rod is pulled, the clamping sleeve follows this movement and the mandrel performs a movement opposite to the movement of the clamping sleeve. If, on the other hand, the actuating rod is adjusted in the direction of the chuck body, the clamping sleeve also follows this movement in this case, while the mandrel is also adjusted in the opposite direction.
    A simple way to adjust the opposing adjustment of the mandrel relative to the clamping sleeve is given when the balance beam has constrictions reducing the outer circumference. The shape of the balance beam makes it easy to specify the desired adjustment of the clamping sleeve and the mandrel. In addition, these constrictions can be produced simply mechanically, for example by machining.
    It has also proven itself within the scope of the invention if at least one pressure medium connection connected to a pressure medium line is provided, via which at least one of the piston disks formed on the mandrel and on the clamping sleeve can be acted upon by means of a pressure medium serving as an actuating means. Through the
    CH 708 568 B1
    Piston disks, which are each assigned to the mandrel and the clamping sleeve, and by the pressure medium that serves as an actuating means, the clamping sleeve and the mandrel can be easily and safely adjusted in opposite directions. In this context, it has also proven to be particularly advantageous if the piston disk assigned to the mandrel and the clamping sleeve is sealed against the chuck body. As a result, a plurality of piston chambers are formed in the chuck body, into which the pressure medium serving as an actuating means can be introduced via the at least one pressure medium connection and the pressure medium line connected thereto, in order to adjust the mandrel and the clamping sleeve in opposite directions. The piston disks serve as piston surfaces which can be acted upon by the pressure medium, the pressure medium originating from a group which contains compressed air and hydraulic fluid.
    It has also been shown to be advantageous if the chuck body is assigned an end plate on the side facing away from the clamping segments, in which a bushing for the actuating means is configured. The cover plate also ensures, in particular, that impurities are prevented from penetrating into the chuck body from the side facing away from the clamping segments. In particular with a large number of clamping processes and thus in particular with high cycle rates, the penetration of contaminants into the chuck body would restrict the functioning of the chuck, since wear would increase. In addition, contaminants penetrating between the clamping sleeve and the mandrel could get stuck and thus prevent their opposing adjustment. The service life of the chuck according to the invention can thus be increased. This also simplifies the assembly of the chuck.
    If the clamping segments are assigned a common base, which is attached to the chuck body, the clamping segments can be easily attached to the chuck body. As a result, there is in particular no need to align the clamping segments when mounting the chuck according to the invention. In addition, the resulting one-piece design of the clamping segments and the common basis reduce the manufacturing outlay. For example, the clamping segments connected to the base can be machined from a solid material.
    It has also been shown to be advantageous if at least one adjusting means is provided to limit the axial adjustment of the mandrel and the clamping sleeve. The at least one adjusting means, which limits the axial adjustment of the mandrel and the clamping sleeve, can limit the clamping force generated by the internal clamping surfaces and the external clamping surfaces, which acts on the workpiece to be clamped. In the context of the invention, it is particularly provided that the at least one adjustment means is accessible from the side of the chuck body facing away from the clamping segments. It has also proven to be useful here if the at least one adjustment means is formed as an adjustment screw which can be adjusted in a corresponding thread receptacle.
    In the following the invention is explained in more detail using exemplary embodiments illustrated in the drawings; it shows:
    1 is a plan view of the chuck according to the invention,
    2 shows a first longitudinal section through a first embodiment of the chuck according to the invention along the section (II-II) from FIG. 1,
    3 shows a second longitudinal section through the first embodiment along the section (III-III) from FIG. 1, and
    Fig. 4 shows a longitudinal section through a second embodiment of the chuck according to the invention in one of the
    Fig. 2 corresponding representation.
    1 shows a plan view of a chuck 1 according to the invention. A chuck body 2, to which a plurality of clamping segments 3 are fastened, can be clearly seen. The clamping segments 3 have a common base 4, wherein it can be seen from FIG. 1 that the base 4 is fastened to the chuck body 2. The clamping segments 3 each have an external clamping surface 5 formed as a clamping line and an internal clamping surface 6.
    Fig. 2 shows a first longitudinal section of a first embodiment of a chuck 1 according to the invention along the section (II-II) from Fig. 1. The chuck 1 shown here shows the cut chuck body 2 with a chuck axis 7. The chuck body 2 is assigned a clamping means 8, which is formed in several parts in the exemplary embodiment shown and consists of a mandrel 9 and a collet 10 arranged coaxially to the mandrel 9. The mandrel 9 and the clamping sleeve 10 can be adjusted in opposite directions by an actuating means 11 along the chuck axis 7. In the exemplary embodiment shown, the actuating means 11 is formed as an actuating rod 12, which can also be adjusted axially along the chuck axis 7. In order to adjust the mandrel 9 and the clamping sleeve 10 in opposite directions by means of the actuating rod 12, this is assigned a balance beam 13 in the exemplary embodiment shown in FIG. 2, which is in engagement with the mandrel 9 and with the clamping sleeve 10. The balance beam 13 is assigned constrictions 14 which reduce the outer circumference in order to simplify the opposite adjustment between the clamping sleeve 10 and the mandrel 9. In addition, the contradicting adjustment between the clamping sleeve 10 and the mandrel 9 is limited by the constrictions 14 formed on the balance beam 13. On the chuck body 2, the clamping segments 3 are arranged on the outer circumference, which can be adjusted radially by the mandrel 9 and by the clamping sleeve 10 arranged coaxially thereto. You can also see that
    CH 708 568 B1 the clamping segments 3 are assigned the common base 4 with which they are fastened to the chuck body 2. The clamping segments 3 are thus formed in one piece and segmented by slots which extend to the base 4. The individual clamping segments 3 each have the inner clamping surface 6 and the outer clamping surface 5 in order to clamp a workpiece to be clamped, which is not shown in the drawing, from the inside or from the outside. For the interaction of the clamping segments 3 with the mandrel 9 and with the clamping sleeve 10, a clamping tooth 15 with a clamping surface 16 and a spreading surface 17 is formed on the clamping segments 3. The mandrel 9 has a spreading geometry 18 corresponding to the spreading surface 17 and the clamping sleeve 10 is assigned a clamping geometry 19 corresponding to the clamping surface 16. As can also be seen in FIG. 2, the chuck body 2 is closed on the side facing away from the clamping segments 3 by an end plate 20, in which a bushing 21 for the actuating means 11 is configured.
    Is now in the embodiment shown in Fig. 2, the actuating rod 12 is adjusted away from the clamping segments 3-is thus pulled on it, so there is an opposite adjustment of the clamping sleeve 10 and the mandrel 9 by the balance beam 13 The clamping sleeve 10 follows the movement of the actuating rod 12 and the mandrel 9 is adjusted in the direction of the clamping segments 3. This leads to the spreading geometry being created
    18, which is formed on the mandrel 9, on the spreading surfaces 17, which are assigned to the individual clamping teeth 15 of the clamping segments 3. Since, in addition, the clamping geometry 19 formed on the clamping sleeve 10 is brought out of engagement with the clamping surface 16 formed on the clamping tooth 15 by the direction of the axial adjustment of the actuating rod 12, the internal clamping surfaces 6 formed on the clamping segments 3 are spread - that is, adjusted radially outward. As a result, the inner clamping surface 6 comes into contact with a workpiece or tool to be clamped, which is thereby clamped on the inside. If, on the other hand, the actuating rod 11 is pushed into the chuck body 2, the balance beam 13 in turn causes the mandrel 9 to move in opposite directions relative to the collet 10. The collet 10 also follows the movement of the actuating rod 12 in this case, while the mandrel 9 counteracts The direction of movement of the actuating rod 12 is adjusted, so that the clamping surfaces 16 formed on the clamping tooth 15 are acted upon by the clamping geometry 19 assigned to the clamping sleeve 10, as a result of which the internal clamping surfaces 6 are adjusted radially inward and thereby clamp a workpiece to be clamped. In the exemplary embodiment shown, an adjusting means 22 is used between the cover plate 20 and the clamping sleeve 10, which limits the adjustment of the clamping sleeve 10.
    Fig. 3 shows a further longitudinal section of the first embodiment along the section III-III from Fig. 1. This also shows in particular that the individual clamping segments 3 have a common base 4 which is attached to the chuck body 2. In addition, the sectional view shown in FIG. 3 shows that an adjustment means 22 which limits the adjustment of the actuating rod 12 is provided on the cover disk 20.
    Fig. 4 shows in a longitudinal section corresponding to FIG. 2, a further embodiment of the chuck 1 according to the invention. In this embodiment, a pressure medium is used as the actuating means 11, which can be introduced into piston chambers 25 via pressure medium connections 23 and pressure medium lines 24 connected thereto ,
    These piston chambers 25 are formed by piston disks 26, which are assigned to the mandrel 9 and the clamping sleeve 10, and are limited by the chuck body 2 and the cover disk 20. The piston disks 26 are sealed against the wall of the chuck body 2 by suitable seals. In the exemplary embodiment shown, the pressure medium lines 24 are designed such that the two piston disks 26, one of which is assigned to the mandrel 9 and the clamping sleeve 10, are adjusted towards one another during internal clamping. As a result, the expansion geometry 18, which is formed on the mandrel 9, comes into contact with the expansion surfaces 17, which are formed on the clamping segments 3 assigned to the clamping segments 3, and the internal clamping surfaces 6 are expanded. For external clamping, the pressure medium serving as actuating means 11 is introduced between the two piston disks 26, which likewise results in a relative adjustment of the clamping mandrel 9 with respect to the clamping sleeve 10. As a result, the outer clamping surfaces 5 assigned to the clamping segments 3 are clamped, since the clamping geometry
    19, which is assigned to the clamping sleeve 10, acts on the clamping surfaces 16 formed on the clamping teeth 15, while the mandrel 9 is removed from the clamping segments 3. In the exemplary embodiment shown in FIG. 4, the adjustment of the mandrel 9 and the clamping sleeve 10 is limited by the adjusting means 22, which is assigned to the piston disks 26.
    LIST OF REFERENCE NUMERALS [0020]
    chuck
    chuck body
    clamping segment
    Base
    Outside clamping surface
    CH 708 568 B1
    Internal clamping surface
    chuck axis
    clamping means
    mandrel
    clamping sleeve
    actuating means
    actuating rod
    balance beam
    constriction
    clamping tooth
    clamping surface
    spreader
    Spreizgeometrie
    clamping geometry
    lens
    execution
    adjusting
    Pressure medium connection
    Pressure medium line
    piston chamber
    piston disc
    权利要求:
    Claims (11)
    [1]
    claims
    1. Chuck with a chuck body (2) having a chuck body (2), which is assigned a chuck (8) adjustable by an actuating means (11) along the chuck axis (7), and with a plurality of chucking segments (3) with the Clamping means (8) radially adjustable inner clamping surfaces (6) and outer clamping surfaces (5), characterized in that the clamping means (8) is formed in several parts from a clamping mandrel (9) and a clamping sleeve (10) arranged coaxially to the clamping mandrel (9), and that the actuating means (11) is provided for the opposite adjustment of the mandrel (9) relative to the clamping sleeve (10).
    [2]
    2. Chuck according to claim 1, characterized in that the clamping segments (3) are each assigned at least one clamping tooth (15) with a clamping surface (16) and with an expanding surface (17).
    [3]
    3. Chuck according to claim 2, characterized in that the mandrel (9) is assigned a spreading geometry (18) corresponding to the spreading surface (17), and that the clamping sleeve (10) has a clamping geometry (19) corresponding to the clamping surface (16) assigned.
    [4]
    4. Chuck according to one of claims 1 to 3, characterized in that the actuating means (11) as an axially along the chuck axis (7) adjustable actuating rod (12) is formed.
    [5]
    5. Chuck according to claim 4, characterized in that the actuating rod (12) is associated with a balance beam (13) which is in engagement with the mandrel (9) and with the clamping sleeve (10).
    [6]
    6. Chuck according to claim 5, characterized in that the balance beam (13) has constrictions (14) which reduce the outer circumference.
    [7]
    7. Chuck according to one of claims 1 to 3, characterized in that at least one with a pressure medium line (24) connected pressure medium connection (23) is provided, via which at least one of each on the mandrel (9) and on the clamping sleeve (10) formed piston disks (26) can be acted upon by means of a pressure medium serving as an actuating means (11).
    CH 708 568 B1
    [8]
    8. Chuck according to claim 7, characterized in that the mandrel (9) and the clamping sleeve (10) each associated piston disc (26) is sealed against the chuck body.
    [9]
    9. Chuck according to one of claims 1 to 8, characterized in that the chuck body (2) on the side facing away from the clamping segments (3) is assigned an end plate (20) in which a bushing (21) is designed for the actuating means.
    [10]
    10. Chuck according to one of claims 1 to 9, characterized in that the clamping segments (3) is assigned a common base (4) which is attached to the chuck body (2).
    [11]
    11. Chuck according to one of claims 1 to 10, characterized in that at least one adjusting means (22) for limiting the axial adjustment of the mandrel (9) and the clamping sleeve (10) is provided.
    CH 708 568 B1
    类似技术:
    公开号 | 公开日 | 专利标题
    DE102013217401B3|2014-12-11|jig
    DE102013012765A1|2015-02-05|Spindle unit for a machining device with a spindle lock
    DE102005055622B3|2006-11-16|Stretching clamping device for clamping components has recess in clamping ring between end sector for screwing to base body and axial sector on compression chamber
    DE102012109633A1|2014-04-10|Balancing or measuring adapter
    EP3178591B1|2019-10-09|Clamping set and tensioning device with such a clamping set
    EP2879824B1|2017-10-04|Balancing or measuring adaptor
    EP1724040A1|2006-11-22|Collet chuck
    DE102012023437A1|2014-06-18|Concentricity-optimized tool clamping system for dental handpieces and dental turbines
    DE102018107444A1|2018-10-04|Boom-supported tuned dynamic damper
    DE10360918A1|2005-07-21|Clamping device with at least one electromechanical actuator as a clamping element
    WO2003095132A1|2003-11-20|Expansion chucking device
    DE4405242B4|2008-10-02|Clamping device for a rotating tool
    CH708568B1|2018-02-28|Chuck.
    DE102007042189A1|2009-03-05|Long Lathe
    WO2017064312A1|2017-04-20|Intermediate sleeve and connection system
    DE102011014490A1|2012-09-20|motor spindle
    DE102015222785B3|2017-03-16|tensioning device
    DE202015008075U1|2015-12-09|tensioning device
    DE19926152A1|2000-12-14|Holder for a rotating tool has an end sleeve with pressure chambers around its periphery to give a radial expansion to the holder opening by hydraulic pressure action with an effective function over a long life
    DE102016107244B4|2021-08-19|Hydraulic expansion clamping device
    DE102016007425A1|2017-12-21|collet
    DE102019111281A1|2020-11-05|Hydraulically clampable tool / workpiece holder
    DE102014220933B4|2016-06-09|Tool for machining workpieces
    DE102011122485B4|2014-03-20|lathe dog
    EP3685963A1|2020-07-29|Clamping device, in particular a vice
    同族专利:
    公开号 | 公开日
    CH708568A2|2015-03-13|
    DE102013109520A1|2015-03-05|
    引用文献:
    公开号 | 申请日 | 公开日 | 申请人 | 专利标题
    DE4114884C2|1991-05-07|1997-05-22|Hans Nos|Method for clamping a workpiece and clamping device for carrying it out|
    法律状态:
    优先权:
    申请号 | 申请日 | 专利标题
    DE102013109520.8A|DE102013109520A1|2013-09-02|2013-09-02|chuck|
    [返回顶部]