A planetary gear shaft grinding jig

Abstract

The utility model discloses a kind of planetary gear shaft gear grinding clamps, including the connecting seat that can be detachably connected with gear grinding equipment, be set on the through cavity of connecting seat, the clamping assembly and locking assembly connected with connecting seat, clamping assembly includes two clamping blocks symmetrically arranged, all clamping blocks can be reciprocated horizontally towards the direction close to or away from through cavity, the inside of each clamping block is provided with a clamping groove, two clamping grooves can be spliced to form a clamping cavity coaxial with through cavity for clamping planetary gear shaft after being close to each other, locking assembly is used to lock the position of two clamping blocks to limit the reciprocation of clamping block, clamping block can rotate, so that the opening degree of clamping cavity is flexibly adjustable, workpiece can very smoothly enter through cavity and clamping cavity, two clamping blocks are symmetrically folded from two sides to hold workpiece, reduce clamping difficulty, workpiece outer peripheral surface does not need to occur rigid friction or extrusion with clamp during clamping process, reduce scratch generation, improve finished product quality.

Description

Technical Field

[0001] This utility model belongs to the field of planetary gear processing technology, specifically relating to a planetary gear shaft grinding fixture. Background Technology

[0002] During the grinding process of planetary gear shafts, a special fixture is required to position and clamp the planetary gear shaft to ensure grinding accuracy. In the existing technology, planetary gear shaft grinding fixtures typically include a base connected to the grinding equipment. To clamp the planetary gear shaft, a fixing groove for accommodating and securing the planetary gear shaft is usually machined directly on the base. The diameter or width of this fixing groove is adapted to the outer diameter of the planetary gear shaft, and simple bolts are used to lock the fixing groove opening.

[0003] However, such traditional clamps have fixed clamping slots that are integral structures directly excavated on the base. Their opening is fixed and limited by the base's own structure, resulting in low flexibility in opening size. Precise alignment of the clamping slot opening is required during clamping, making operation difficult and clamping inefficient. On the other hand, during the loading and unloading of planetary gear shafts, scratches and bumps can easily occur on the outer circumference of the planetary gear shafts due to friction or alignment deviations, which in turn affects the subsequent gear grinding accuracy and the quality of the finished product. Utility Model Content

[0004] In view of the technical problems existing in the prior art, this utility model provides a planetary gear shaft grinding fixture.

[0005] To achieve the above objectives, the present invention adopts the following technical solution: A planetary gear shaft grinding fixture includes a connecting seat detachably connected to a grinding device, a through cavity provided on the connecting seat, a clamping assembly connected to the connecting seat, and a locking assembly. The clamping assembly includes two symmetrically arranged clamping blocks, all of which can reciprocate horizontally in a direction toward or away from the through cavity. Each clamping block has a clamping groove on its inner side. When the two clamping grooves come close to each other, they can be joined to form a clamping cavity coaxial with the through cavity for clamping the planetary gear shaft. The locking assembly is used to lock the position of the two clamping blocks to limit the reciprocating movement of the clamping blocks.

[0006] Furthermore, each of the clamping slots is provided with two spaced mounting notches, and a copper pad can be detachably connected to each mounting notch. When the planetary gear shaft to be processed is clamped in the clamping cavity, the copper pad contacts the planetary gear shaft.

[0007] Furthermore, the mounting notch is recessed from the side wall of the clamping groove toward the outside of the clamping groove; the copper pad includes a vertical pad that can be adapted to the mounting notch and a horizontal pad with one end vertically connected to the vertical pad. The horizontal pad is provided with a plurality of first screw holes, and the horizontal pad is screwed and fixed to the clamping block by installing bolts in the first screw holes.

[0008] Furthermore, the first end of all the clamping blocks is rotatably connected to the connecting seat via a first connector. A pressure plate is also mounted on the first connector. The pressure plate can cooperate with the first connector to press and fix the clamping block to the connecting seat, thereby restricting the rotational freedom of the clamping block relative to the connecting seat.

[0009] Furthermore, the second end of all the clamping blocks is integrally formed with a lug extending away from the first end, and the two lugs are symmetrically arranged and can be detachably connected to the locking assembly.

[0010] Furthermore, the locking assembly includes a clamping member and a locking member. The clamping member includes a clamping screw and a pressure block fixed to the clamping screw. Both inner walls of the two lugs are provided with clearance grooves for avoiding the clamping screw. The connecting seat is also provided with a second threaded hole that can be screwed into the clamping screw. When the clamping screw is screwed into the second threaded hole, the pressure block can clamp and fix the lug to the connecting seat. The locking element is a locking screw that can be screwed into the two lugs.

[0011] Furthermore, the connecting seat is provided with a plurality of third threaded holes distributed around the through cavity, and the connecting seat is fixed to the gear grinding equipment by bolts being threaded into the third threaded holes.

[0012] Furthermore, the connecting seat is provided with an L-shaped clearance notch, which is distributed adjacent to the locking component.

[0013] In summary, the beneficial effects of this utility model are as follows: 1. Significantly improved clamping efficiency: The clamping block can be fully opened, making the opening of the clamping cavity flexibly adjustable. The workpiece only needs to be inserted into the through cavity and the clamping block closed to complete the clamping. Compared with the traditional "hard-plug" clamping, this reduces the number of operation steps and lowers the clamping difficulty. 2. Multiple structures ensure coaxiality and clamping accuracy: The connecting seat is fixed by a circumferentially uniform third screw hole, ensuring precise coaxiality between the through cavity and the inner cavity of the equipment base; the locking component's "axial pressing + radial pulling" bidirectional fixing can not only limit the up-and-down movement of the clamping block, but also counteract the lateral reaction force of processing, preventing the clamping cavity from shifting or enlarging, and ensuring that the workpiece is clamped without skewing. 3. The L-shaped copper pad has a lower hardness than the planetary gear shaft, and directly contacts the workpiece during clamping. Even if there is a slight misalignment, the copper pad will deform slightly rather than scratch the workpiece, completely solving the surface scratches and bumps caused by traditional hard contact, ensuring the accuracy of the workpiece's reference surface, and providing a stable foundation for subsequent gear grinding. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the structure of a planetary gear shaft grinding fixture provided by this utility model.

[0015] Figure 2 yes Figure 1 A schematic diagram of a structure in which a workpiece is clamped in the clamping cavity.

[0016] Figure 3 yes Figure 1 A schematic diagram of the middle connector.

[0017] Figure 4 yes Figure 3 Sectional view along the AA direction.

[0018] Figure 5 This is a schematic diagram of the clamping block in this utility model.

[0019] Figure 6 yes Figure 5 A schematic diagram of a structure in which a workpiece is clamped in the clamping cavity.

[0020] Figure 7 This is a cross-sectional view of the pressure plate in this utility model.

[0021] Figure 8 This is a cross-sectional view of the clamping component in this utility model.

[0022] Figure 9 This is a cross-sectional view of the copper pad in this utility model.

[0023] In the diagram, 100-connecting seat, 110-through cavity, 120-second screw hole, 130-third screw hole, 140-fourth screw hole, 150-avoidance notch, 200-clamping assembly, 210-clamping block, 211-clamping groove, 2110-installation notch, 212-clamping cavity, 213-fitting hole, 214-support lug, 2140-avoidance groove, 2141-fifth screw hole, 215-sixth screw hole, 300-locking assembly, 310-pressing component, 311-pressing screw, 312-pressing block, 320-locking component, 400-copper washer, 410-vertical washer, 420-horizontal washer, 421-first screw hole, 500-first connecting component, 510-pressure plate, 511-through hole, 600-bolt, 700-workpiece. Detailed Implementation

[0024] The present invention will be further illustrated below with reference to specific figures.

[0025] Please see Figure 1 This utility model provides a planetary gear shaft grinding fixture, including a connecting seat 100 detachably connected to the base of a grinding device, a through cavity 110 disposed on the connecting seat 100, a clamping assembly 200 connected to the connecting seat 100, and a locking assembly 300. The clamping assembly 200 includes two symmetrically arranged clamping blocks 210, all of which can reciprocate horizontally in a direction approaching or away from the through cavity 110. Each clamping block 210 has a clamping groove 211 on its inner side. (See also...) Figure 2 When the two clamping slots 211 come close together, they can be joined to form a clamping cavity 212 coaxial with the through cavity 110 for clamping the planetary gear shaft (i.e., workpiece 700). The locking assembly 300 is used to lock the position of the two clamping blocks 210 to limit the reciprocating movement of the clamping blocks 210. The through cavity 110 can communicate with the inner cavity in the base of the gear grinding equipment to accommodate the shaft body of the planetary gear shaft. When the two clamping blocks 210 are opened and the planetary gear shaft is inserted into the through cavity 110, the two clamping blocks 210 come close together and can hold the lower part of the planetary gear shaft to be processed, facilitating the gear grinding operation of the gear grinding equipment. The clamping block 210 of this fixture can be fully opened, allowing for flexible adjustment of the opening of the clamping cavity 212. The workpiece 700 can smoothly enter the through cavity 110 and the clamping cavity 212. The two clamping blocks 210 symmetrically close from both sides to hold the workpiece 700, ensuring even force distribution and precise clamping. Simply open the clamping blocks 210, insert the workpiece 700 into the through cavity 110, and then close the clamping blocks 210 again. This significantly reduces operational difficulty and improves clamping efficiency. During clamping, the outer circumference of the workpiece 700 does not require hard friction or compression with the fixture, effectively avoiding surface scratches caused by friction and alignment deviations when the workpiece 700 is "forcefully stuffed" into the fixture using traditional fixtures, thus contributing to improved finished product quality.

[0026] Please see Figure 3 The connecting seat 100 is provided with several third threaded holes 130 distributed around the through cavity 110. The connecting seat 100 is fixed to the base of the gear grinding equipment by bolts 600 being screwed into the third threaded holes 130. The multiple third threaded holes 130 distributed around the base can form a more comprehensive fixing point, disperse the stress caused by vibration, and the evenly distributed third threaded holes also facilitate precise positioning during installation, eliminating the need to repeatedly adjust the position of the connecting seat 100 and improving the efficiency of installation and disassembly (maintenance, replacement).

[0027] The first end of each clamping block 210 is rotatably connected to the connecting seat 100 via a first connecting member 500. The first connecting member 500 is a bolt 600 with a threaded section and a smooth shaft section. A mating hole 213 for assembling the first connecting member 500 is provided at a corresponding position on the clamping block 210, and a fourth threaded hole 140 is provided at a corresponding position on the connecting seat 100 for connection with the first connecting member 500. A pressure plate 510 is also mounted on the first connecting member 500. (See [link to relevant documentation]). Figure 7 The pressure plate 510 has at least two through holes 511, which can cooperate with the first connecting member 500 to press and fix the clamping block 210 and the connecting seat 100, thereby restricting the rotational freedom of the clamping block 210 relative to the connecting seat 100. When it is necessary to lock the clamping block 210, tighten the first connecting member 500, and its threaded section will be tightly screwed into the fourth threaded hole 140 of the connecting seat 100, which will drive the pressure plate 510 to press down on the first end of the clamping block 210, locking the rotational freedom of the clamping block 210 and ensuring the stability when clamping the workpiece 700. When it is necessary to open the clamping block 210, simply loosen the first connecting member 500 in the opposite direction, and the optical shaft section will enter the mating hole 213 of the clamping block 210. Because the surface of the optical axis section is smooth and without sharp edges, it forms a clearance fit with the mating hole 213. The first end of the clamping block 210 can rotate flexibly around the optical axis section, enabling the smooth opening of the two clamping blocks 210 and facilitating the loading and unloading of the workpiece 700. The state switching can be completed without disassembling the parts, which not only ensures rigid locking during clamping but also simplifies the opening and closing operation steps, improving the ease of use of the fixture.

[0028] Please see Figure 5 and Figure 6 All clamping blocks 210 have an integrally formed lug 214 at their second end, extending away from the first end. The two lugs 214 are symmetrically arranged and each can be detachably connected to the locking assembly 300. The locking assembly 300 includes a clamping member 310 and a locking member 320. Please refer to [link to relevant documentation]. Figure 8 The clamping member 310 includes a clamping screw 311 and a clamping block 312 fixedly connected to the clamping screw 311. Both lugs 214 have relief grooves 2140 on their inner walls to avoid the clamping screw 311. Please continue reading. Figure 3 andFigure 4 The connecting seat 100 is also provided with a second threaded hole 120 that can be screwed into the clamping screw 311. When the clamping screw 311 is screwed into the second threaded hole 120, the clamping block 312 can clamp and fix the lug 214 to the connecting seat 100. The clamping member 310 presses the lug 214 tightly onto the connecting seat 100 from the "axial" direction (perpendicular to the rotation plane of the clamping block 210), which can directly restrict the vertical movement freedom of the clamping block 210, avoid the clamping cavity 212 from shifting due to tilting, and ensure the stability of the clamping position.

[0029] The locking component 320 is a locking screw that can be screwed into the two lugs 214. A fifth screw hole 2141 is provided at the corresponding position of the lug 214, located on one side of the clearance groove 2140. The locking screw is screwed into the two fifth screw holes 2141 to lock the clamping cavity 212. The locking component 320 uses the locking screw to screw the two symmetrical lugs 214 together and pull them back. During the grinding process, the workpiece 700 will be subjected to a lateral reaction force, which could easily cause the two clamping blocks 210 to separate to both sides. The pulling force of the locking screw can directly offset this reaction force, preventing the clamping cavity 212 from expanding and the workpiece 700 from loosening, thus avoiding deviations in machining dimensions. Both-way locking is achieved through screws. During operation, only the corresponding screws need to be tightened / loosened, without the need to disassemble complex components. Furthermore, the detachable connection design facilitates subsequent maintenance and replacement of the clamping blocks 210, balancing fixed reliability and operational convenience.

[0030] To facilitate the installation and removal of screws using tools, the connector 100 is provided with an L-shaped clearance notch 150, which is distributed adjacent to the locking assembly 300. For example, when a wrench or other tools are needed to install or remove the locking screw, the L-shaped clearance notch 150 avoids the interference area between the wrench and the connector 100, providing ample space for the wrench to rotate more widely. The sufficient operating space allows the operator to hold the tool more stably, facilitating installation and removal.

[0031] Please continue reading. Figure 6 Each clamping slot 211 has two spaced mounting notches 2110, and a copper pad 400 can be detachably connected to each mounting notch 2110. When the planetary gear shaft to be processed is clamped in the clamping cavity 212, the copper pad 400 contacts the planetary gear shaft (i.e., the workpiece 700). The hardness of the copper pad 400 is lower than that of the planetary gear shaft (usually made of steel). During clamping, the copper pad 400 directly contacts the outer circumferential surface of the planetary gear shaft. Even if there is a slight misalignment or pressure fluctuation when the clamping blocks 210 are closed, the copper pad 400 will undergo a slight deformation due to its lower hardness, rather than scraping or squeezing the surface of the workpiece 700. Although the copper pad 400 is soft, it has a certain degree of rigidity and will not deform excessively due to the vibration of gear grinding. It can always maintain stable contact with the workpiece 700, balancing the dual requirements of "surface protection" and "stable clamping".

[0032] The mounting notch 2110 is formed by recessing from the side wall of the clamping groove 211 towards the outside of the clamping groove 211. Please refer to [link / reference]. Figure 9 The copper pad 400 has an L-shaped structure and includes a vertical pad 410 that fits into the mounting notch 2110 and a horizontal pad 420 with one end perpendicularly connected to the vertical pad 410. The horizontal pad 420 has several first screw holes 421, while the clamping block 210 has several corresponding sixth screw holes 215. The horizontal pad 420 and the clamping block 210 are screwed and fixed by installing bolts 600 in the corresponding first screw holes 421 and sixth screw holes 215. The L-shaped copper pad 400 is fixed by bolts 600, which can provide stronger fixing force for the copper pad 400 and adapt to the vibration requirements of the processing scene. The combination of the recessed mounting notch 2110 and the L-shaped copper pad 400 makes the installation of the copper pad 400 "foolproof". When replacing it, you only need to align the vertical pad 410 with the mounting notch 2110 and insert it, and then tighten the bolts 600. There is no need to repeatedly adjust the position, reducing the difficulty of operation.

[0033] This fixture offers the following advantages: 1. Significantly improved clamping efficiency: The clamping block 210 can be fully opened, allowing for flexible adjustment of the opening of the clamping cavity 212. The workpiece 700 only needs to be inserted into the through cavity 110 and then the clamping block 210 closed to complete clamping. Compared to traditional "hard-plug" clamping, this reduces the number of operation steps and lowers the clamping difficulty. 2. Multiple structures ensure coaxiality and clamping accuracy: The connecting seat 100 is fixed by a circumferentially uniform third screw hole 130, ensuring precise coaxiality between the through cavity 110 and the inner cavity of the equipment base. The locking assembly 300's "axial compression + radial pull" bidirectional fixing not only restricts the vertical movement of the clamping block 210 but also counteracts the lateral reaction force of the machining, preventing the clamping cavity 212 from shifting or enlarging, ensuring that the workpiece 700 is clamped without skewing. Third, the L-shaped copper pad 400 has a lower hardness than the planetary gear shaft. During clamping, it directly contacts the workpiece 700. Even if there is a slight misalignment, the copper pad 400 will deform slightly instead of scratching the workpiece 700, which completely solves the problem of surface scratches and bumps caused by traditional hard contact, ensures the accuracy of the workpiece 700 datum surface, and provides a stable foundation for subsequent gear grinding.

[0034] The above are merely embodiments of this utility model and do not limit the patent scope of this utility model. Any equivalent structure made using the contents of this utility model specification and drawings, whether directly or indirectly applied to other related technical fields, shall also be within the patent protection scope of this utility model.

Claims

1. A planetary gear shaft grinding fixture, characterized in that: The device includes a connecting seat that can be detachably connected to a gear grinding device, a through cavity provided on the connecting seat, a clamping assembly connected to the connecting seat, and a locking assembly. The clamping assembly includes two clamping blocks arranged symmetrically. All clamping blocks can reciprocate horizontally in a direction toward or away from the through cavity. Each clamping block has a clamping groove on its inner side. When the two clamping grooves come close to each other, they can be joined to form a clamping cavity coaxial with the through cavity for clamping the planetary gear shaft. The locking assembly is used to lock the position of the two clamping blocks to limit the reciprocating movement of the clamping blocks.

2. The planetary gear shaft grinding fixture according to claim 1, characterized in that: All of the clamping slots are provided with two spaced mounting notches, and a copper pad can be detachably connected to each mounting notch. When the planetary gear shaft to be processed is clamped in the clamping cavity, the copper pad contacts the planetary gear shaft.

3. The planetary gear shaft grinding fixture according to claim 2, characterized in that: The mounting notch is formed by recessing from the side wall of the clamping groove toward the outside of the clamping groove; the copper pad includes a vertical pad that can be adapted to the mounting notch and a horizontal pad with one end vertically connected to the vertical pad. The horizontal pad is provided with a plurality of first screw holes, and the horizontal pad is screwed and fixed to the clamping block by installing bolts in the first screw holes.

4. The planetary gear shaft grinding fixture according to claim 2, characterized in that: The first end of all the clamping blocks is rotatably connected to the connecting seat via a first connector. A pressure plate is also mounted on the first connector. The pressure plate can cooperate with the first connector to press and fix the clamping block to the connecting seat, thereby restricting the rotational freedom of the clamping block relative to the connecting seat.

5. The planetary gear shaft grinding fixture according to claim 4, characterized in that: The second end of all the clamping blocks is integrally formed with a lug extending away from the first end, and the two lugs are symmetrically arranged and can be detachably connected to the locking assembly.

6. The planetary gear shaft grinding fixture according to claim 5, characterized in that: The locking assembly includes a clamping member and a locking member. The clamping member includes a clamping screw and a pressure block fixed to the clamping screw. Both of the inner walls of the two lugs are provided with relief grooves to avoid the clamping screw. The connecting seat is also provided with a second threaded hole that can be screwed into the clamping screw. When the clamping screw is screwed into the second threaded hole, the pressure block can press and fix the lugs to the connecting seat. The locking element is a locking screw that can be screwed into the two lugs.

7. The planetary gear shaft grinding fixture according to any one of claims 1-6, characterized in that: The connecting seat is provided with a plurality of third threaded holes distributed around the through cavity, and the connecting seat is fixed to the gear grinding equipment by bolts being threaded into the third threaded holes.

8. The planetary gear shaft grinding fixture according to claim 7, characterized in that: The connector is provided with an L-shaped clearance notch, which is distributed adjacent to the locking component.

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