Four-jaw chuck for machining differential spider

Abstract

The utility model relates to the technical field of universal joint pin machining equipment, and particularly discloses a four-jaw chuck for machining a universal joint pin of a differential mechanism. The placement table is correspondingly provided with placement grooves used for being connected with a main shaft of the cross shaft in a clamped mode and limiting grooves used for limiting four branch shafts of the cross shaft, a lifting assembly is arranged on one side of the placement table, and an overturning assembly is arranged on the lifting assembly; the device has the beneficial effects that the placement table, the placement groove, the limiting groove and the auxiliary positioning block are matched to conveniently place, limit and position the cross shaft, and the lifting assembly, the overturning assembly, the rotating ring and the clamping and fixing assembly are matched together to conveniently clamp four branch shafts of the cross shaft which is placed for the first time, so that the clamping and fixing effects are improved. Moreover, the lifting and overturning of the cross shaft in a clamping state are facilitated, the operation is convenient, repeated clamping operation is not needed, and convenience is provided for chamfering machining of the center hole of the differential cross shaft.

Description

Technical Field

[0001] This utility model relates to the technical field of cross shaft machining equipment, specifically a four-jaw chuck for machining differential cross shafts. Background Technology

[0002] The differential cross shaft has a central ring surrounded by four evenly distributed thin journals. The forging process of the differential cross shaft is as follows: blanking—medium frequency induction heating—upsetting (removing oxide scale)—extrusion—final forging—edge trimming—punching—correction.

[0003] The machining accuracy of the differential cross shaft directly affects the transmission accuracy and service life of the universal joint, and its machining accuracy is closely related to the design and manufacturing level of the fixture. Currently, when chamfering the center hole of the differential cross shaft, a four-jaw chuck is generally used to clamp it from the four ends of the differential cross shaft. However, clamping the differential cross shaft requires manual placement by operators, which can lead to deviations in the position and coaxiality of the four-jaw chuck when clamping the differential cross shaft, affecting the finished product quality of the differential cross shaft.

[0004] Prior art patent application number 202021204553.6 discloses a four-jaw chuck for machining differential cross shafts, including a base and four jaws, and a clamping assembly respectively disposed on each jaw. The clamping assembly includes a fixing block fixedly connected to the surface of the jaw away from the base, and a pressure block disposed on the side of the fixing block near the center of the base. The surface of the fixing block near the center of the base has a groove, and a slider fixedly connected to the pressure block is slidably connected in the groove. An elastic element is disposed between the slider and the inner wall of the groove. The surface of the fixing block near the center of the base is configured as an inclined surface with the end away from the base inclined towards the center of the base. The surface of the pressure block near the fixing block is configured as an inclined surface that fits against the fixing block, so as to make the positioning of the differential cross shaft more accurate after being placed on the four-jaw chuck, thereby improving the finished quality of the differential cross shaft.

[0005] However, the existing technology is not convenient for quickly flipping the cross shaft after machining. It requires unclamping and flipping, and then clamping again after flipping. The operation is cumbersome and requires multiple clamping operations, which is not conducive to the chamfering of the center hole of the differential cross shaft. Therefore, a four-jaw chuck for machining the differential cross shaft is proposed. Utility Model Content

[0006] To effectively solve the problems in the background art and overcome the technical defects in the prior art, this utility model provides the following technical solution:

[0007] A four-jaw chuck for machining a differential cross shaft includes a base, on which a placement platform is provided. The placement platform is provided with placement slots for engaging with the main shaft of the cross shaft and limiting slots for limiting the four branch shafts of the cross shaft. A lifting assembly is provided on one side of the placement platform, and a flipping assembly is provided on the lifting assembly. A rotating ring is provided on the flipping assembly, and a clamping and fixing assembly for engaging and clamping the four branch shafts of the cross shaft is provided inside the rotating ring.

[0008] As a preferred technical solution of this utility model, the placement platform is fixedly installed at the center of the upper surface of the base, the placement groove is correspondingly opened at the center of the upper surface of the placement platform, and the front, back, left and right sides of the upper surface of the placement platform are provided with limiting grooves that communicate with the placement groove.

[0009] As a preferred technical solution of this utility model, the lifting assembly includes a hydraulic lifting rod and a lifting frame. The hydraulic lifting rod is fixedly installed on one side of the upper surface of the base. The top end of the hydraulic lifting rod is fixedly connected to the center of the bottom of the lifting frame. The height to which the hydraulic lifting rod and the lifting frame drive the rotating ring to rise and fall is greater than the radius of the rotating ring.

[0010] As a preferred technical solution of this utility model, the flipping assembly includes a rotating shaft, a rotating rod, a socket, a limiting pin, and a limiting hole. The rotating shaft is rotatably connected to the inner side of the lifting frame through a damping bearing. The inner end of the rotating shaft is fixedly connected to the outer side of the rotating ring. The outer end of the rotating shaft extending to the outside of the lifting frame is fixedly connected to the center of the inner side of the rotating rod. A socket is provided on one side of the rotating rod. A limiting hole corresponding to the socket is provided on the lifting frame. A limiting pin is movably inserted into the socket and the limiting hole.

[0011] As a preferred technical solution of this utility model, the clamping and fixing assembly includes a hydraulic telescopic rod, a clamping block and a clamping hole. The hydraulic telescopic rod is fixedly installed on the inner side of the rotating ring, and a clamping block is fixedly installed on the inner end of the hydraulic telescopic rod. The inner end of the clamping block is provided with a clamping hole corresponding to the outer end of the cross shaft.

[0012] As a preferred technical solution of this utility model, an auxiliary positioning block is integrally provided at the center of the bottom of the placement groove, and the maximum width of the auxiliary positioning block is not greater than the inner diameter of the cross shaft main shaft.

[0013] Compared with the prior art, the beneficial effects of this utility model are as follows: This four-jaw chuck for machining differential cross shafts, through the cooperation of the placement platform, placement groove, limit groove, and auxiliary positioning block, facilitates the placement, limit, and positioning of the cross shaft. Through the joint cooperation of the lifting assembly, flipping assembly, rotating ring, and clamping and fixing assembly, it is easy to clamp the four sub-shafts of the cross shaft initially placed, and it is also easy to lift and flip the cross shaft in the clamped state. The operation is convenient and does not require multiple clamping operations, which provides convenience for the chamfering of the center hole of the differential cross shaft. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the structure of this utility model.

[0015] Figure 2 This is a schematic diagram of the placement platform and cross shaft of this utility model.

[0016] Figure 3 This is a schematic diagram of the structure of the placement platform of this utility model.

[0017] Figure 4 This is a schematic diagram of the structure of the flipping component and the rotating ring of this utility model.

[0018] Figure 5 This is a schematic diagram of the clamping and fixing component of this utility model.

[0019] In the diagram: 1. Base; 2. Placement platform; 3. Placement slot; 4. Limiting slot; 5. Lifting assembly; 51. Hydraulic lifting rod; 52. Lifting frame; 6. Tilting assembly; 61. Rotating shaft; 62. Rotating rod; 63. Insertion hole; 64. Limiting pin; 65. Limiting hole; 7. Rotating ring; 8. Clamping and fixing assembly; 81. Hydraulic telescopic rod; 82. Clamping block; 83. Clamping hole; 9. Main shaft; 10. Sub-shaft; 11. Auxiliary positioning block. Detailed Implementation

[0020] 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.

[0021] Please see Figure 1-5This utility model provides a technical solution: a four-jaw chuck for machining a differential cross shaft, including a base 1, a placement platform 2 on the base 1, placement slots 3 for engaging with the main shaft 9 of the cross shaft and limiting slots 4 for limiting the four branch shafts 10 of the cross shaft, a lifting assembly 5 on one side of the placement platform 2, a flipping assembly 6 on the lifting assembly 5, a rotating ring 7 on the flipping assembly 6, and a clamping and fixing assembly 8 for engaging and clamping the four branch shafts 10 of the cross shaft inside the rotating ring 7.

[0022] Specifically, the placement platform 2, the rotating ring 7, and the clamping and fixing assembly 8 together form a four-jaw chuck structure.

[0023] Furthermore, the placement platform 2 is fixedly installed at the center of the upper surface of the base 1, and the placement groove 3 is correspondingly opened at the center of the upper surface of the placement platform 2. Limiting grooves 4 communicating with the placement groove 3 are opened on the front, back, left and right sides of the upper surface of the placement platform 2. In use, the placement platform 2, the placement groove 3 and the limiting groove 4 facilitate the placement, limiting and positioning of the cross shaft, so as to facilitate the subsequent clamping operation.

[0024] Furthermore, the lifting assembly 5 includes a hydraulic lifting rod 51 and a lifting frame 52. The hydraulic lifting rod 51 is fixedly installed on one side of the upper surface of the base 1. The top end of the hydraulic lifting rod 51 is fixedly connected to the center of the bottom of the lifting frame 52. The hydraulic lifting rod 51 and the lifting frame 52 drive the rotating ring 7 to rise and fall to a height greater than the radius of the rotating ring 7. In use, the lifting frame 52 is raised and lowered by the hydraulic lifting rod 51, which can drive the flipping assembly 6, the rotating ring 7 and the clamping and fixing assembly 8 to rise and fall, which is convenient for clamping the four sub-shafts 10 of the cross shaft placed for the first time, and also facilitates the lifting and flipping of the cross shaft in the clamped state.

[0025] Furthermore, the flipping assembly 6 includes a rotating shaft 61, a rotating rod 62, an insertion hole 63, a limiting pin 64, and a limiting hole 65. The rotating shaft 61 is rotatably connected to the inner side of the lifting frame 52 via a damping bearing. The inner end of the rotating shaft 61 is fixedly connected to the outer side of the rotating ring 7. The outer end of the rotating shaft 61 extending to the outside of the lifting frame 52 is fixedly connected to the center of the inner side of the rotating rod 62. An insertion hole 63 is provided on one side of the rotating rod 62. A limiting hole 65 corresponding to the insertion hole 63 is provided on the lifting frame 52. The limiting pin 64 is movably inserted into the insertion hole 63 and the limiting hole 65. In use, by pulling out the limiting pin 64, flipping the rotating rod 62 180 degrees up and down, and then inserting the limiting pin 64 again, the flipping of the cross shaft can be completed.

[0026] Furthermore, the clamping and fixing assembly 8 includes a hydraulic telescopic rod 81, a clamping block 82, and a clamping hole 83. The hydraulic telescopic rod 81 is fixedly installed on the inner side of the rotating ring 7. The clamping block 82 is fixedly installed on the inner end of the hydraulic telescopic rod 81. The inner end of the clamping block 82 is provided with a clamping hole 83 corresponding to the outer end of the cross shaft 10. In use, the four hydraulic telescopic rods 81 drive the four clamping blocks 82 to move in and out, so that the four clamping holes 83 respectively engage with the outer end of the corresponding cross shaft 10, so as to complete the entry and exit operation of the cross shaft.

[0027] Furthermore, an auxiliary positioning block 11 is integrally provided at the center of the bottom of the placement groove 3. The maximum width of the auxiliary positioning block 11 is not greater than the inner diameter of the cross shaft spindle 9, so that the inner hole of the cross shaft spindle 9 can be fitted onto the outside of the auxiliary positioning block 11 during use.

[0028] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A four jaw chuck for machining a differential spider, comprising a base (1), characterised in that: The base (1) is provided with a placement platform (2). The placement platform (2) is provided with a placement groove (3) for engaging with the main shaft (9) of the cross shaft and a limiting groove (4) for limiting the four sub-shafts (10) of the cross shaft. A lifting assembly (5) is provided on one side of the placement platform (2). A flipping assembly (6) is provided on the lifting assembly (5). A rotating ring (7) is provided on the flipping assembly (6). A clamping and fixing assembly (8) for engaging and clamping the four sub-shafts (10) of the cross shaft is provided inside the rotating ring (7).

2. The four jaw chuck for machining a differential spider of claim 1, wherein: The placement platform (2) is fixedly installed at the center of the upper surface of the base (1), and the placement groove (3) is correspondingly opened at the center of the upper surface of the placement platform (2). Limiting grooves (4) communicating with the placement groove (3) are opened on the front, back, left and right sides of the upper surface of the placement platform (2).

3. The four jaw chuck for machining a differential spider of claim 1, wherein: The lifting assembly (5) includes a hydraulic lifting rod (51) and a lifting frame (52). The hydraulic lifting rod (51) is fixedly installed on one side of the upper surface of the base (1). The top end of the hydraulic lifting rod (51) is fixedly connected to the center of the bottom of the lifting frame (52). The hydraulic lifting rod (51) and the lifting frame (52) drive the rotating ring (7) to rise and fall to a height greater than the radius of the rotating ring (7).

4. The four jaw chuck for machining a differential spider of claim 3, wherein: The flipping assembly (6) includes a rotating shaft (61), a rotating rod (62), a socket (63), a limiting pin (64), and a limiting hole (65). The rotating shaft (61) is rotatably connected to the inner side of the lifting frame (52) through a damping bearing. The inner end of the rotating shaft (61) is fixedly connected to the outer side of the rotating ring (7). The outer end of the rotating shaft (61) extending to the outside of the lifting frame (52) is fixedly connected to the center of the inner side of the rotating rod (62). A socket (63) is provided on one side of the rotating rod (62). A limiting hole (65) corresponding to the socket (63) is provided on the lifting frame (52). A limiting pin (64) is movably inserted into the socket (63) and the limiting hole (65).

5. The four jaw chuck for machining a differential spider of claim 1, wherein: The clamping and fixing assembly (8) includes a hydraulic telescopic rod (81), a clamping block (82) and a clamping hole (83). The hydraulic telescopic rod (81) is fixedly installed on the inner side of the rotating ring (7). The clamping block (82) is fixedly installed on the inner end of the hydraulic telescopic rod (81). The clamping hole (83) is opened on the inner end of the clamping block (82) for corresponding to the outer end of the cross shaft (10).

6. The four jaw chuck for machining a differential spider of claim 1, wherein: An auxiliary positioning block (11) is integrally provided at the center of the bottom of the placement groove (3), and the maximum width of the auxiliary positioning block (11) is not greater than the inner diameter of the cross shaft main shaft (9).

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