Gear shaping clamp for machining spline on eccentric shaft part

Abstract

The utility model discloses a gear shaping clamp for processing a spline on an eccentric shaft part, which relates to the technical field of tool clamps and comprises a tool bottom plate, a tool main seat is fixedly arranged at the upper end of the tool bottom plate, and a part groove matched with the shape of an eccentric shaft part body is arranged at the center of the upper portion of the tool main seat. A side clamping sliding groove is formed in one side of the upper portion of the tool main base, and a side clamping mechanism used for clamping an eccentric shaft part body on the tool main base on the side edge is installed at the side clamping sliding groove. A jacking and pressing through groove is formed in the bottom of the part groove, and a jacking and pressing mechanism used for jacking and pressing the eccentric shaft part body in the vertical direction is installed at the jacking and pressing through groove; according to the utility model, the part groove is accurately matched with the eccentric shaft body, and the double fixation of side clamping and top pressing is combined, so that the repeated positioning accuracy and the gear ring jumping requirement during processing are ensured.

Description

Technical Field

[0001] This utility model relates to the field of tooling and fixture technology, and in particular to a gear-shaping fixture for machining splines on eccentric shaft parts. Background Technology

[0002] Eccentric shaft drives are widely used in the field of power tools. Common eccentric shaft parts basically come in two structural forms: one with gears and the other without gears. Eccentric shafts with spline structures, due to their special eccentric structure, often use cold extrusion for their gear parts. Gear rolling is extremely costly, so gear shaping is frequently used in actual production.

[0003] like Figure 5 As shown, the eccentric shaft part body includes a sector-shaped main body 100, a main body pulley 200 at the lower end of the sector-shaped main body 100, a main shaft sleeve 300 fixedly mounted at the upper end of the sector-shaped main body 100, a part spindle 500 fixedly mounted at the upper end of the main shaft sleeve 300, and a spline main body 400 mounted on the part spindle 500. Due to its structure, the eccentric shaft cannot be directly clamped for gear shaping using self-centering chucks or elastic clamps. To ensure smooth machining, fast clamping, and high repeatability, a special fixture is designed and manufactured to ensure consistency between the starting position of the eccentric shaft and the teeth, the tooth runout based on the reference circle, and the tooth accuracy during subsequent gear shaping. However, in actual operation, the manufacture of the fixture is quite difficult, and it is challenging to improve the clamping speed, ensure the repeatability of the fixture, and maintain the stability of the product machining. Utility Model Content

[0004] This utility model provides a gear shaping fixture for machining splines on eccentric shaft parts, which can solve the problem in the prior art that eccentric shafts cannot be directly clamped for gear shaping using self-centering chucks or elastic sleeves.

[0005] The objective of this utility model can be achieved through the following technical solutions:

[0006] A gear-shaping fixture for machining splines on eccentric shaft parts includes a fixture base plate. A fixture main seat is fixedly mounted on the upper end of the fixture base plate. A part-shaped groove adapted to the shape of the eccentric shaft part is provided at the upper center of the fixture main seat. A side clamping groove is provided on one side of the upper part of the fixture main seat. A side clamping mechanism for clamping the eccentric shaft part on the fixture main seat from the side is installed at the side clamping groove. A top-pressing through groove is provided at the bottom of the part-shaped groove. A top-pressing mechanism for pressing the eccentric shaft part vertically is installed at the top-pressing through groove.

[0007] Preferably, the side clamping mechanism includes a limiting slide seat slidably disposed in the side clamping groove, a side clamping support is fixedly disposed at the upper end of the limiting slide seat, a through groove is provided on the side clamping support, and a clamping slider is slidably disposed in the through groove.

[0008] Preferably, an adjusting support is fixedly installed on the side of the side clamping support away from the eccentric shaft part body by mounting bolts, and an adjusting screw is threaded through the adjusting support, the end of the adjusting screw being rotatably connected to the clamping slider.

[0009] Preferably, the clamping slider is provided with an arc-shaped groove on the side near the eccentric shaft part body that mates with the outer periphery of the main shaft sleeve on the eccentric shaft part body.

[0010] Preferably, a limit groove is provided on the side of the clamping slider away from the eccentric shaft part body, and a limit joint is provided at the end of the adjusting screw to rotate with the limit groove.

[0011] Preferably, the pressing mechanism includes a pressing screw slidably disposed in the pressing through groove and a drive assembly for driving the pressing screw to move up and down.

[0012] Preferably, the drive assembly includes a connecting shaft and a bearing two fixedly disposed within the main seat of the tooling. An adjusting gear is fixedly mounted on the connecting shaft via the bearing two. A threaded bushing is fixedly mounted on the inner ring of the bearing two. A transmission gear that meshes with the adjusting gear is fixedly mounted on the outer circumference of the threaded bushing. The top pressure screw is threadedly connected through the threaded bushing.

[0013] Preferably, the top-pressing screw is provided with a limiting guide groove, and a limiting guide rod is slidably connected at the limiting guide groove. The limiting guide rod is fixedly installed at the bottom of the tooling base plate through a connecting base plate.

[0014] Preferably, the horizontal cross-sections of the limiting guide groove and the limiting guide rod are both regular polygons.

[0015] Preferably, protective pads are provided on the top of the top-pressing screw and inside the arc-shaped groove of the clamping slider.

[0016] The beneficial effects of this utility model are:

[0017] (1) The part groove is precisely matched with the eccentric shaft body, and the double fixation of side clamp and top pressure ensures the repeatability of positioning accuracy and the requirements of gear ring runout during processing.

[0018] (2) Adjusting the screw and gear drive structure simplifies the operation steps and significantly improves clamping efficiency.

[0019] (3) The arc-shaped groove for holding the slider and the protective pad on the top of the top pressure screw are claimed to prevent scratches on the surface of the parts.

[0020] (4) The limiting guide rod and the regular polygonal guide groove eliminate the risk of torsion during the top pressing process and ensure processing stability. Attached Figure Description

[0021] The present invention will be further described below with reference to the accompanying drawings.

[0022] Figure 1 This is a three-dimensional structural schematic diagram of a gear-shaping fixture for machining splines on eccentric shaft parts according to this utility model.

[0023] Figure 2 This is an isometric structural diagram of a gear-shaping fixture for machining splines on eccentric shaft parts according to this utility model.

[0024] Figure 3 This is a schematic diagram of the overall cross-sectional structure of a gear-shaping fixture for machining splines on eccentric shaft parts according to the present invention.

[0025] Figure 4 This is a utility model Figure 3 Enlarged structural diagram at point A;

[0026] Figure 5 This is a schematic diagram of the structure of the eccentric shaft part body of this utility model.

[0027] Explanation of reference numerals in the attached figures:

[0028] 1. Fixture base plate; 2. Fixture main seat; 21. Side clamping groove; 22. Part groove; 23. Top pressing through groove; 3. Side clamping mechanism; 31. Limiting slide; 32. Side clamping support; 33. Adjusting support; 34. Mounting bolt; 35. Adjusting screw; 36. Clamping slider; 37. Limiting joint; 38. Limiting slot; 4. Top pressing mechanism; 41. Connecting shaft; 42. Bearing 1; 43. Adjusting gear; 44. Bearing 2; 45. Threaded bushing; 46. Transmission gear; 47. Top pressing screw; 47. Limiting guide groove; 48. Connecting base plate; 49. Limiting guide rod; 5. Eccentric shaft part body; 100. Fan-shaped main body; 200. Main body pulley; 300. Main shaft sleeve; 400. Splined main body; 500. Part main shaft. Detailed Implementation

[0029] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0030] Please see Figures 1-5As shown, this utility model is a gear-shaping fixture for machining splines on eccentric shaft parts. The fixture includes a tooling base plate 1, a tooling main seat 2 fixedly mounted on the upper end of the tooling base plate 1, a part-shaped groove 22 adapted to the shape of the eccentric shaft part body 5 at the upper center of the tooling main seat 2, a side clamping groove 21 on one side of the upper part of the tooling main seat 2, and a side clamping mechanism 3 for clamping the eccentric shaft part body 5 on the tooling main seat 2 from the side at the side clamping groove 21; a top-pressing through groove 23 is provided at the bottom of the part-shaped groove 22, and a top-pressing mechanism 4 for pressing the eccentric shaft part body 5 vertically at the top-pressing through groove 23.

[0031] In an optional embodiment, the side clamping mechanism 3 includes a limiting slide block 31 slidably disposed in the side clamping groove 21, a side clamping support 32 fixedly disposed at the upper end of the limiting slide block 31, a through groove disposed on the side clamping support 32, and a clamping slider 36 slidably disposed in the through groove.

[0032] It should be noted that the sliding design of the side clamping mechanism 3 allows the clamping slider 36 to be adjusted according to the size of the eccentric shaft part, thus improving the versatility of the fixture.

[0033] In an optional embodiment, an adjusting support 33 is fixedly installed on the side of the side clamping support 32 away from the eccentric shaft part body 5 by a mounting bolt 34. An adjusting screw 35 is threaded through the adjusting support 33, and the end of the adjusting screw 35 is rotatably connected to the clamping slider 36.

[0034] It should be noted that the design of the adjusting support 33 and the adjusting screw 35 allows for precise control of the clamping force, further improving the stability and accuracy of clamping.

[0035] In an optional embodiment, the clamping slider 36 is provided with an arc-shaped groove on the side near the eccentric shaft part body 5 that mates with the outer periphery of the main shaft sleeve 300 on the eccentric shaft part body 5.

[0036] It should be noted that the arc-shaped groove design of the clamping slider 36 fits tightly with the outer periphery of the main sleeve 300 of the eccentric shaft part, effectively preventing slippage and vibration during the machining process.

[0037] In an optional embodiment, the clamping slider 36 is provided with a limiting groove 38 on the side away from the eccentric shaft part body 5, and the end of the adjusting screw 35 is provided with a limiting joint 37 that rotates with the limiting groove 38.

[0038] It should be noted that the design of the limiting slot 38 and the limiting connector 37 ensures a stable connection between the adjusting screw 35 and the clamping slider 36, thereby improving the reliability of clamping.

[0039] In an optional embodiment, the pressing mechanism 4 includes a pressing screw 47 slidably disposed in the pressing channel 23 and a drive assembly for driving the pressing screw 47 to move up and down.

[0040] It should be noted that the sliding design of the pressing mechanism 4 and the cooperation of the drive components enable the stable lifting and lowering movement of the pressing screw 47, providing reliable vertical pressing for the eccentric shaft parts.

[0041] In an optional embodiment, the drive assembly includes a connecting shaft 41 and a bearing 44 fixedly disposed within the tooling main seat 2. An adjusting gear 43 is fixedly mounted on the connecting shaft 41 via a bearing 42. A threaded bushing 45 is fixedly mounted on the inner ring of the bearing 44. A transmission gear 46 that meshes with the adjusting gear 43 is fixedly mounted on the outer periphery of the threaded bushing 45. The top pressure screw 47 is threadedly connected through the threaded bushing 45.

[0042] It should be noted that the drive assembly achieves the lifting and lowering movement of the top screw 47 through gear transmission, which is compact in structure and has high transmission efficiency.

[0043] In an optional embodiment, the top-pressing screw 47 is provided with a limiting guide groove 471, and a limiting guide rod 49 is slidably connected at the limiting guide groove 471. The limiting guide rod 49 is fixedly installed at the bottom of the tooling base plate 1 through a connecting base plate 48.

[0044] It should be noted that the design of the limiting guide groove 471 and the limiting guide rod 49 effectively prevents the top pressure screw 47 from rotating during the lifting process, thus improving the stability of the top pressure.

[0045] In an optional embodiment, the horizontal cross-sections of the limiting guide groove 471 and the limiting guide rod 49 are both regular polygons.

[0046] It should be noted that the horizontal cross-sections of the limiting guide groove 471 and the limiting guide rod 49 are both regular polygons, which further enhances the limiting effect and ensures the stable movement of the top pressure screw 47.

[0047] In an optional embodiment, protective pads are provided on the top of the top pressure screw 47 and inside the arcuate groove of the clamping slider 36.

[0048] It should be noted that the protective pads on the top of the top of the top screw 47 and inside the arc groove of the clamping slider 36 effectively prevent scratches and damage to the eccentric shaft parts during the machining process.

[0049] The working principle of this utility model is as follows: The side clamping mechanism 3 moves laterally through a limiting slide block 31 that is slidably disposed in the side clamping groove 21. A side clamping support 32 is fixed at the upper end of the limiting slide block 31, and a clamping slider 36 is slidably disposed in the through groove on the side clamping support 32. By adjusting the adjusting screw 35 on the support 33, the clamping slider 36 can be pushed to slide along the through groove, thereby clamping the side of the eccentric shaft part body 5 in the part-shaped groove 22 of the tooling main seat 2. The side of the clamping slider 36 near the eccentric shaft part body 5 is provided with an arc-shaped groove that matches the outer circumference of the main sleeve 300, ensuring the stability and accuracy of clamping.

[0050] The pressing mechanism 4 performs vertical pressing by sliding a pressing screw 47 within the pressing groove 23. The pressing screw 47 is driven to move vertically by a drive assembly, which includes a connecting shaft 41 and a second bearing 44 fixed within the tooling main seat 2. An adjusting gear 43 is fixedly mounted on the connecting shaft 41 via a first bearing 42. A threaded bushing 45 is fixedly mounted on the inner ring of the second bearing 44, and a transmission gear 46, meshing with the adjusting gear 43, is fixedly mounted on the outer circumference of the threaded bushing 45. By rotating the adjusting gear 43, the transmission gear 46 and the threaded bushing 45 can be rotated, thereby driving the pressing screw 47 to move vertically, thus pressing and fixing the eccentric shaft part body 5.

[0051] The top-pressing screw 47 is provided with a limiting guide groove 471, and a limiting guide rod 49 is slidably connected at the limiting guide groove 471. The limiting guide rod 49 is fixedly installed at the bottom of the tooling base plate 1 through the connecting base plate 48. The horizontal cross-sections of the limiting guide groove 471 and the limiting guide rod 49 are both regular polygons, ensuring that the top-pressing screw 47 does not rotate during the lifting and lowering process, and maintaining a stable pressing effect.

[0052] The above description provides a detailed account of one embodiment of the present invention. However, this description is merely a preferred embodiment and should not be construed as limiting the scope of the present invention. All equivalent variations and improvements made within the scope of the claims of the present invention should still fall within the patent coverage of the present invention.

Claims

1. A gear-shaping fixture for machining splines on eccentric shaft parts, characterized in that, The fixture includes a base plate (1), a main fixture seat (2) is fixedly provided at the upper end of the base plate (1), a part groove (22) adapted to the shape of the eccentric shaft part body (5) is provided at the upper center of the main fixture seat (2), a side clamping groove (21) is provided on one side of the upper part of the main fixture seat (2), and a side clamping mechanism (3) for clamping the eccentric shaft part body (5) on the main fixture seat (2) is installed at the side clamping groove (21); a top pressing groove (23) is provided at the bottom of the part groove (22), and a top pressing mechanism (4) for pressing the eccentric shaft part body (5) vertically is installed at the top pressing groove (23).

2. A gear-shaping fixture for machining splines on eccentric shaft parts according to claim 1, characterized in that, The side clamping mechanism (3) includes a limiting slide (31) slidably disposed in the side clamping groove (21). A side clamping support (32) is fixedly disposed on the upper end of the limiting slide (31). A through groove is provided on the side clamping support (32), and a clamping slider (36) is slidably disposed in the through groove.

3. A gear-shaping fixture for machining splines on eccentric shaft parts according to claim 2, characterized in that, The side clamping support (32) is fixedly mounted with an adjusting support (33) on the side away from the eccentric shaft part body (5) by a mounting bolt (34). An adjusting screw (35) is threaded through the adjusting support (33), and the end of the adjusting screw (35) is rotatably connected to the clamping slider (36).

4. A gear-shaping fixture for machining splines on eccentric shaft parts according to claim 3, characterized in that, The clamping slider (36) is provided with an arc-shaped groove on the side near the eccentric shaft part body (5) that matches the outer periphery of the main shaft sleeve (300) on the eccentric shaft part body (5).

5. A gear-shaping fixture for machining splines on eccentric shaft parts according to claim 4, characterized in that, The clamping slider (36) is provided with a limit slot (38) on the side away from the eccentric shaft part body (5), and the end of the adjusting screw (35) is provided with a limit joint (37) that rotates with the limit slot (38).

6. A gear-shaping fixture for machining splines on eccentric shaft parts according to claim 3, characterized in that, The top pressing mechanism (4) includes a top pressing screw (47) slidably disposed in the top pressing through groove (23) and a drive assembly for driving the top pressing screw (47) to move up and down.

7. A gear-shaping fixture for machining splines on eccentric shaft parts according to claim 6, characterized in that, The drive assembly includes a connecting shaft (41) and a bearing (44) fixedly installed in the tooling main seat (2). An adjusting gear (43) is fixedly installed on the connecting shaft (41) via a bearing (42). A threaded bushing (45) is fixedly installed on the inner ring of the bearing (44). A transmission gear (46) that meshes with the adjusting gear (43) is fixedly installed on the outer circumference of the threaded bushing (45). The top pressure screw (47) is threadedly connected to the threaded bushing (45).

8. A gear-shaping fixture for machining splines on eccentric shaft parts according to claim 7, characterized in that, The top-pressing screw (47) is provided with a limiting guide groove (471), and a limiting guide rod (49) is slidably connected at the limiting guide groove (471). The limiting guide rod (49) is fixedly installed at the bottom of the tooling base plate (1) through the connecting base plate (48).

9. A gear-shaping fixture for machining splines on eccentric shaft parts according to claim 8, characterized in that, The horizontal cross-sections of the limiting guide groove (471) and the limiting guide rod (49) are both regular polygons.

10. A gear-shaping fixture for machining splines on eccentric shaft parts according to claim 9, characterized in that, Protective pads are provided on the top of the top pressure screw (47) and inside the arc groove of the clamping slider (36).

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