Duplicate gear clamping fixture

Abstract

The utility model discloses a duplicate gear clamping fixture, which relates to the technical field of fixtures and comprises a chuck body, a plurality of first end face pressing claws, a plurality of second end face pressing claws and a plurality of radial clamping claws. The chuck body comprises a jacking piece; the jacking piece is located on the axis of a rotating shaft of the chuck body. The first end face pressing claw is fixed on the chuck body; the first end face pressing claw can apply pressure towards the ejecting piece to the part. The second end face pressing claw is fixed on the chuck body; the second end face pressing claw can apply pressure opposite to the abutting piece to the part. The radial clamping claws are fixed on the chuck body; the radial clamping claws can apply pressure to the part from the radial direction of the part to fix the part. The duplicate gear clamping fixture provided by the utility model solves the problem of low machining precision of clamping an inner circle of a duplicate gear in the prior art, and can stably clamp the duplicate gear on the premise of ensuring that teeth of the duplicate gear are not deformed due to overlarge clamping force, so that the machining precision of the inner circle of the duplicate gear is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of clamps, in particular to a double gear clamping clamp. Background Art

[0002] Two gears with the same module but different numbers of teeth made into one body are called duplex gears.

[0003] In the prior art, when clamping a duplex gear and machining the inner hole of the duplex gear, the tooth top circles of the two gears of the duplex gear are clamped simultaneously to ensure high coaxial accuracy between the duplex gear and the machine tool spindle.

[0004] For example, Chinese patent application No. 202323462105.2 discloses a fixture for processing duplex gears, which provides a clamp for clamping the duplex gears, and is used to process the inner hole of the duplex gears after clamping the duplex gears.

[0005] However, in the prior art, some duplex gears have a large difference in diameter between the two gears. When the difference in diameter between the two gears of the duplex gear is significant, the uneven distribution of the center of gravity may lead to a decrease in the stability of the workpiece during the clamping process, and the smaller gear part may shake or shift due to uneven force (the large difference in diameter between the two gears of the duplex gear leads to an uneven distribution of the overall center of gravity. During the clamping process, this uneven distribution of the center of gravity may cause the smaller gear part to bear a greater torque, causing the entire duplex gear to shake or shift), thereby affecting the processing accuracy.

[0006] However, if the clamping force on the pinion of the duplex gear is increased (to ensure that the duplex gear is more stable than the fixture during the processing of the inner circle of the duplex gear), the increased clamping force may cause the teeth of the pinion of the duplex gear to deform (because the pinion is under greater stress), thereby affecting the meshing effect of the duplex gear after processing. Utility Model Content

[0007] In response to the above technical problems, the double gear clamping fixture provided by the present invention can stably clamp the double gears while ensuring that the teeth of the double gears are not deformed due to excessive clamping force.

[0008] In order to achieve the above purpose, the technical solution adopted by the utility model is:

[0009] The double gear clamping fixture provided by the utility model includes a chuck body, a plurality of first end face clamping claws, a plurality of second end face clamping claws and a plurality of radial clamping claws; the chuck body includes a clamping piece; the clamping piece is located on the axis of the rotating shaft of the chuck body; the first end face clamping claw is fixed on the chuck body; the first end face clamping claw can apply pressure to the part toward the clamping piece; the second end face clamping claw is fixed on the chuck body; the second end face clamping claw can apply pressure to the part away from the clamping piece; the radial clamping claw is fixed on the chuck body; the radial clamping claw can apply pressure to the part from the radial direction of the part to fix the part.

[0010] The double gear clamping fixture provided by the present invention preferably comprises the first end face pressing claw including a support rod and a pressure plate; the support rod is fixed on the chuck body; the pressure plate is rotatably fixed on the support rod; during the rotation of the pressure plate compared to the support rod, the shortest distance from the pressure plate to the axis of the chuck body's rotating shaft will change; the surface of the pressure plate facing the support rod is the first abutment surface; the first abutment surface is perpendicular to the rotating shaft of the chuck body.

[0011] In the double gear clamping fixture provided by the present invention, preferably, the first end surface pressing claws are arranged in an equidistant circular array with the rotating axis of the chuck body as the axis.

[0012] In the double gear clamping fixture provided by the present invention, preferably, the second end surface pressing claw is fixed on the clamping member; the second end surface pressing claw is provided with a second abutment surface; the second abutment surface is perpendicular to the rotating axis of the chuck body.

[0013] In the double gear clamping fixture provided by the present invention, preferably, the second end face clamping claws are arranged in an equidistant circular array with the rotating axis of the chuck body as the axis; the distance between the second end face clamping claws and the two adjacent first end face clamping claws is equal.

[0014] The above technical solution has the following advantages or beneficial effects:

[0015] The utility model discloses a double gear clamping fixture, which relates to the technical field of clamps, and includes a chuck body, a plurality of first end face pressing claws, a plurality of second end face pressing claws, and a plurality of radial clamping claws; the chuck body includes a clamping member; the clamping member is located on the axis of the rotating shaft of the chuck body; the first end face pressing claw is fixed to the chuck body; the first end face pressing claw can apply pressure to the part toward the clamping member; the second end face pressing claw is fixed to the chuck body; the second end face pressing claw can apply pressure to the part away from the clamping member; the radial clamping claw is fixed to the chuck body; the radial clamping claw can apply pressure to the part from the radial direction of the part to fix the part. The double gear clamping fixture provided by the utility model solves the problem of low internal machining accuracy of clamping double gears in the prior art, and can stably clamp the double gears while ensuring that the teeth of the double gears are not deformed due to excessive clamping force, thereby improving the internal machining accuracy of the double gears. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The present invention and its features, features, configurations, and advantages will become more apparent upon reading the detailed description of the following non-limiting embodiments with reference to the accompanying drawings. Like reference numerals indicate like parts throughout the drawings. The drawings are not drawn to scale, with emphasis placed on illustrating the subject matter of the present invention.

[0017] Figure 1 This is a schematic diagram of the overall structure of the double gear clamping fixture provided in Example 1 of the present utility model.

[0018] Figure 2 This is a schematic diagram of the overall structure of the double gear clamping fixture provided in Example 1 of the present utility model when clamping a double gear.

[0019] Figure 3 This is a schematic diagram of the overall structure of the double gear clamping fixture provided in Example 1 of the present utility model when clamping the double gear and hiding the large double gear.

[0020] Figure 4 This is a schematic diagram of the position of the first abutment surface of the double gear clamping fixture provided in Example 1 of the present utility model.

[0021] Figure 5 This is a schematic diagram of the position of the tightening member of the double gear clamping fixture provided in Example 1 of the present utility model. DETAILED DESCRIPTION

[0022] It should be noted that, in the absence of conflict, the embodiments and features in the embodiments of this application can be combined with each other. It should be noted that the terms used in this utility model are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to this application.

[0023] The following describes the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. It is obvious that the embodiments described are only some of the embodiments of the present invention, rather than all of the embodiments. Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely represents selected embodiments of the present invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative work are within the scope of protection of the present invention.

[0024] Example 1:

[0025] The double gear clamping fixture provided in Example 1 of the present utility model is as follows: Figures 1 to 5 As shown, it includes a chuck body 1, a plurality of first end face clamping jaws 2, a plurality of second end face clamping jaws 3 and a plurality of radial clamping jaws 4; the chuck body 1 includes a clamping member 11; the clamping member 11 is located on the axis of the rotating shaft of the chuck body 1; the first end face clamping jaw 2 is fixed on the chuck body 1; the first end face clamping jaw 2 can apply pressure toward the clamping member 11 to the part; the second end face clamping jaw 3 is fixed on the chuck body 1; the second end face clamping jaw 3 can apply pressure back to the clamping member 11 to the part; the radial clamping jaw 4 is fixed on the chuck body 1; the radial clamping jaw 4 can apply pressure to the part from the radial direction of the part to fix the part.

[0026] When the double gear clamping fixture provided in Example 1 of the present invention is working, the small gear of the double gear is set toward the clamping member 11, and the radial clamping claw 4 (the radial clamping claw 4 is a prior art for clamping the outer circle of the gear, such as a new gear ring end face positioning hard turning tool disclosed in Chinese patent application No. 201821927282.X, whose clamping claws can be the radial clamping claws in this embodiment) applies radial pressure to the small gear of the double gear, and the first end face clamping claw 2 applies pressure to the small gear of the double gear toward the clamping member 11, and the second end face clamping claw 3 applies pressure to the large gear of the double gear against the clamping member 11, thereby achieving the fixation of the double gear; compared with the prior art clamping of the double gear Compared with the gear method, in this embodiment, since a plurality of first end face clamping claws 2 and a plurality of second end face clamping claws 3 are provided to assist in clamping the double gear, after the first end face clamping claw 2 contacts and presses the small gear of the double gear (the end face facing the large gear side), and the second end face clamping claw 3 contacts and presses the large gear of the double gear (the end face facing the small gear side), static friction will be generated. When the chuck body 1 rotates around the axis, the above-mentioned static friction can make the double gear stationary compared to the chuck body 1, thereby avoiding the radial clamping claw 4 from applying excessive extrusion pressure on the tooth surface of the small gear of the double gear and causing deformation, and achieving stable clamping of the double gear, thereby ensuring the processing accuracy when processing the inner circle of the double gear.

[0027] The double gear clamping fixture provided in Example 1 of the present invention solves the problem of low internal circle machining accuracy of double gear clamping in the prior art. This embodiment increases the points for applying pressure to the double gears, reduces the stress on the teeth, and stably clamps the double gears while ensuring that the teeth of the double gears are not deformed due to excessive clamping force, thereby improving the internal circle machining accuracy of the double gears.

[0028] As a preferred solution, in this embodiment, the first end face clamping claw 2 includes a support rod 21 and a pressure plate 22; the support rod 21 is fixed on the chuck body 1; the pressure plate 22 can be rotatably fixed on the support rod 21; during the rotation of the pressure plate 22 compared to the support rod 21, the shortest distance from the pressure plate 22 to the axis of the rotation shaft of the chuck body 1 will change; the surface of the pressure plate 22 facing the support rod 21 is the first abutment surface 221; the first abutment surface 221 is perpendicular to the rotation axis of the chuck body 1. By rotating the pressure plate 22 relative to the support rod 21, the distance between the nearest point of the pressure plate 22 and the rotating shaft of the chuck body 1 is changed. When the pressure plate 22 is farthest from the rotating shaft of the chuck body 1, the small gear of the double gear can pass through the plate surface of the pressure plate 22 normally and contact the tightening member 11. At this time, by rotating the pressure plate 22 again, the pressure plate 22 can be pressed against the end face of the small gear of the double gear (towards the large gear side) (the spring and other structures are arranged in the support rod 21 so that the pressure plate 22 can be extended and retracted in the axis direction of the rotating shaft of the chuck body 1. This is an existing technology and will not be elaborated here).

[0029] As a preferred solution, in this embodiment, the first end surface pressing jaws 2 are arranged in an equidistant circumferential array around the rotation axis of the chuck body 1. The equidistant circumferential array of the first end surface pressing jaws 2 can ensure uniform force on the duplex gear and stabilize it.

[0030] In order to stably fix the workpiece, as a preferred solution, in this embodiment, the second end surface clamping claw 3 is fixed on the clamping member 11; a second abutment surface 31 is provided on the second end surface clamping claw 3; the second abutment surface 31 is perpendicular to the rotation axis of the chuck body 1. The pressing member 11 is relatively fixed to the second end face pressing claw 3, so the second abutting surface 31 of the second end face pressing claw 3 is fixed relative to the position of the double gear when the pressing member 11 contacts the double gear; the second end face pressing claw 3 applies pressure toward the pressing member 3 to the small gear of the double gear through the first end face pressing claw 2, and reacts on the large gear of the double gear; the structure provided in this embodiment applies pressure to the double gear (the small gear faces one side of the large gear, and the large gear faces one side of the small gear), and uses the first end face pressing claw 2 and the second end face pressing claw 3 to respectively contact and squeeze the double gear. The static friction force generated by the first end face pressing claw 2 and the second end face pressing claw 3 and the double gear ensures that when the chuck body 1 rotates and drives the first end face pressing claw 2 and the second end face pressing claw 3, the double gear and the first end face pressing claw 2 and the second end face pressing claw 3 remain relatively stationary.

[0031] As a preferred solution, in this embodiment, the second end surface clamping jaws 3 are arranged in an equidistant circular array around the rotation axis of the chuck body 1. The distances between the second end surface clamping jaws 3 and two adjacent first end surface clamping jaws 2 are equal. This equidistant circular array of first and second end surface clamping jaws 2 and 3 ensures uniform force distribution and stability for the duplex gears.

[0032] In summary, the utility model discloses a double gear clamping fixture, which relates to the field of fixture technology, including a chuck body, a plurality of first end face pressing claws, a plurality of second end face pressing claws and a plurality of radial clamping claws; the chuck body includes a clamping member; the clamping member is located on the axis of the rotating shaft of the chuck body; the first end face pressing claw is fixed to the chuck body; the first end face pressing claw can apply pressure to the part toward the clamping member; the second end face pressing claw is fixed to the chuck body; the second end face pressing claw can apply pressure to the part away from the clamping member; the radial clamping claw is fixed to the chuck body; the radial clamping claw can apply pressure to the part from the radial direction of the part to fix the part. The double gear clamping fixture provided by the utility model solves the problem of low internal machining accuracy of clamping double gears in the prior art, and can stably clamp the double gears while ensuring that the teeth of the double gears are not deformed due to excessive clamping force, thereby improving the internal machining accuracy of the double gears.

[0033] The above description is only a preferred embodiment of the present invention and does not limit the patent scope of the present invention. Any equivalent structural transformation made using the contents of the description and drawings of the present invention, or directly or indirectly applied in other related technical fields, is also included in the patent protection scope of the present invention.

Claims

1. A double gear clamping fixture, comprising a chuck body, characterized in that: It also includes a plurality of first end surface pressing claws, a plurality of second end surface pressing claws and a plurality of radial clamping claws; The chuck body includes a tightening member; the tightening member is located on the axis of the rotating shaft of the chuck body; The first end surface pressing claw is fixed on the chuck body; the first end surface pressing claw can apply pressure to the part toward the pressing member; The second end surface pressing claw is fixed on the chuck body; the second end surface pressing claw can apply pressure on the part back to the pressing member; The radial clamping claws are fixed to the chuck body; The radial clamping claws can apply pressure to the component from a radial direction of the component to fix the component.

2. The double gear clamping fixture according to claim 1, characterized in that: The first end surface pressing claw includes a support rod and a pressure plate; the support rod is fixed to the chuck body; the pressure plate is rotatably fixed to the support rod; During the rotation of the pressure plate relative to the support rod, the shortest distance from the pressure plate to the axis of the chuck body rotation shaft changes; The surface of the pressure plate facing the support rod is a first abutment surface; the first abutment surface is perpendicular to the rotation axis of the chuck body.

3. The double gear clamping fixture according to claim 2, characterized in that: The first end surface pressing claws are arranged in an equidistant circular array with the rotation axis of the chuck body as the axis.

4. The double gear clamping fixture according to claim 1, characterized in that: The second end surface pressing claw is fixed on the pressing member; a second abutting surface is provided on the second end surface pressing claw; and the second abutting surface is perpendicular to the rotating axis of the chuck body.

5. The double gear clamping fixture according to claim 4, characterized in that: The second end surface pressing claws are arranged in an equidistant circular array with the rotation axis of the chuck body as the axis; The distances between the second end surface pressing claw and two adjacent first end surface pressing claws are equal.

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