Composite grinding machine tool for grinding pin wheel housing

Abstract

The invention relates to the technical field of grinding machine tools, in particular to a composite grinding machine tool for grinding a pin wheel housing, which comprises a grinding machine tool, a machine base, a grinding part arranged on the machine base, a composite part arranged on the grinding part, an indexing part arranged on the machine base, a workpiece mechanism, a pin wheel housing and a fixed conversion mechanism, comprising a clamping part arranged on the indexing part. According to the composite grinding machine tool for grinding the pin wheel housing, the clamping part is started to drive the linkage adjusting part to enable the limiting part to move, the limiting part drives the center positioning part to turn over, accordingly, center positioning is conducted on the pin wheel housing, meanwhile, the clamping part drives the chuck folding part to clamp and fix the pin wheel housing, and the stability and precision of the pin wheel housing during grinding are guaranteed. When the inner circular face and the outer circular face of the pin wheel housing are ground, a machine tool does not need to be replaced, and grinding operation is reduced.

Description

Technical Field

[0001] The invention relates to the technical field of grinding machine tools, in particular to a composite grinding machine tool for grinding a pin gear housing. Background Art

[0002] RV reducer is an important core component of the robot. The precision control of its production process directly affects the manufacturing cost and service life of the robot. Among them, the grinding of the tooth groove of the pinion gear housing is an important step in the manufacturing of RV reducer.

[0003] At present, most of the workpieces of this type of grinders in China and abroad are clamped manually and manually aligned. This method is inefficient and takes more than 10 minutes to clamp a workpiece, which directly affects the production efficiency of the RV reducer pin gear housing tooth groove grinding. The early and currently imported foreign grinders place the workpiece on the workpiece spindle rotating workbench, and then need to manually align the workpiece center step by step, and then manually lock and fix it. The workpiece installation and clamping time is long and inefficient, and the excessive auxiliary time directly prolongs the product processing time.

[0004] For example, the application number is 201611236125.X, which is a quick clamping fixture for the tooth groove grinder of the pinion gear housing of a robot joint precision reducer. Although the device can quickly clamp and fix the pinion gear housing, the use of the clamping fixture makes it impossible to grind the outer cylindrical surface of the pinion gear housing. Therefore, when grinding the outer cylindrical surface, the fixture needs to be replaced, which is more troublesome to operate. Summary of the invention

[0005] In view of the problem that the existing composite grinding machine for grinding the pinion housing needs to replace the fixture when grinding the outer cylindrical surface, the present invention is proposed which can grind the outer cylindrical surface and the inner cylindrical surface of the pinion housing without replacing the fixture.

[0006] In order to solve the above technical problems, the present invention provides the following technical solutions: comprising: A grinding machine tool comprises a machine base, a grinding part arranged on the machine base, a compound part arranged on the grinding part, and a dividing part arranged on the machine base; A workpiece mechanism, including a pin gear housing; The fixed conversion mechanism includes a clamping portion arranged on the indexing portion, a clamping head folding portion arranged on the clamping portion, a center positioning portion arranged on the clamping portion, a linkage adjustment portion arranged on the clamping portion, and a limiting portion arranged on the linkage adjustment portion.

[0007] As a preferred solution of the composite grinding machine for grinding the pin gear housing of the present invention, the grinding part includes a sliding base arranged on the machine base, a first grinding wheel machine arranged on the sliding base, and a first grinding wheel head arranged on the first grinding wheel machine.

[0008] As a preferred solution of the composite grinding machine for grinding the pin gear housing of the present invention, the composite part includes a second grinding wheel machine arranged on the first grinding wheel machine and a second grinding wheel head arranged on the second grinding wheel machine.

[0009] As a preferred solution of the composite grinding machine for grinding pin gear housings of the present invention, the indexing part includes an indexing machine arranged on the machine base, an indexing motor arranged on the machine base and connected to the indexing machine, and an indexing shaft arranged on the indexing machine.

[0010] As a preferred solution of the composite grinding machine for grinding the needle tooth housing of the present invention, the needle tooth housing includes a needle tooth outer ring, a needle tooth inner ring arranged on the needle tooth outer ring, an outer circular surface arranged on the needle tooth outer ring, a tooth groove arranged in the needle tooth inner ring, and an inner circular surface arranged in the needle tooth inner ring.

[0011] As a preferred solution of the composite grinding machine for grinding the pin gear housing described in the present invention, the clamping part includes a workpiece placement plate arranged on the indexing shaft, a clamping groove arranged on the workpiece placement plate, a sliding square column arranged in the clamping groove, and a hydraulic rod arranged on the indexing shaft and connected to the sliding square column.

[0012] As a preferred solution of the composite grinding machine for grinding the pin gear housing of the present invention, the chuck folding portion includes a receiving groove arranged on the sliding square column, a receiving shaft arranged in the receiving groove, and a chuck arranged on the receiving shaft.

[0013] As a preferred solution of the composite grinding machine for grinding needle tooth housings described in the present invention, the center positioning portion includes a positioning mounting plate arranged on the workpiece placement plate, a positioning rotating shaft arranged on the positioning mounting plate, a reset torsion spring arranged on the positioning rotating shaft, a positioning extension rod arranged on the positioning rotating shaft, a positioning boss arranged on the positioning extension rod and adapted to the tooth groove, and a positioning toggle rod arranged on the positioning rotating shaft.

[0014] As a preferred solution of the composite grinding machine for grinding the needle tooth housing described in the present invention, the linkage adjustment part includes a linkage slider arranged in the workpiece placement plate, a linkage extension rod arranged on the linkage slider, a linkage extrusion head arranged on the linkage extension rod, and a linkage triangular block arranged on the linkage slider.

[0015] As a preferred solution of the composite grinding machine for grinding the pin gear housing described in the present invention, the limiting portion includes a spring groove arranged on the sliding square column, a limiting spring arranged in the spring groove, a limiting frame arranged on the limiting spring, an extrusion bevel arranged on the limiting frame, a through hole arranged on the limiting frame and connected to the extrusion bevel, and a threaded extrusion rod arranged on the workpiece placement plate and adapted to the through hole.

[0016] The beneficial effects of the present invention are as follows: starting the clamping part drives the linkage adjustment part to move the limiting part, and the limiting part drives the center positioning part to flip, thereby center positioning the needle tooth housing, and fixing the needle tooth housing at the same time, and then grinding the outer cylindrical surface of the needle tooth housing. After the outer cylindrical surface grinding is completed, the folding part of the chuck fixes the outer cylindrical surface, and the center positioning part automatically resets, and then the inner cylindrical surface is ground. The device can grind the outer cylindrical surface and the inner cylindrical surface of the needle tooth housing without replacing the fixture, and the positioning and clamping of the workpiece are fast and convenient, which improves the efficiency of clamping and grinding. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces the drawings required for describing the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work. Among them: Figure 1 The figure is a schematic diagram of the overall structure of the composite grinding machine tool for grinding the pin gear housing according to the present invention.

[0018] Figure 2 It is a schematic structural diagram of the workpiece mechanism of the composite grinding machine tool for grinding the pin gear housing of the present invention.

[0019] Figure 3 The figure is a schematic diagram of the outer cylindrical surface grinding of the composite grinding machine tool for grinding the pin gear housing of the present invention.

[0020] Figure 4 The figure is a schematic diagram of inner cylindrical surface grinding of a composite grinding machine tool for grinding a pin gear housing according to the present invention.

[0021] Figure 5 The schematic diagram of the structure of the sliding square column of the composite grinding machine tool for grinding the pin gear housing of the present invention is shown in FIG.

[0022] Figure 6 It is a structural schematic diagram of the linkage adjustment part of the composite grinding machine tool for grinding the pin gear housing of the present invention.

[0023] Figure 7 Composite grinding machine tool for grinding pin gear housing of the present invention Figure 6 A local enlarged schematic diagram of point A in the middle.

[0024] Figure 8 It is a structural schematic diagram of the center positioning part of the composite grinding machine tool for grinding the pin gear housing of the present invention.

[0025] Fig. 9 It is a schematic structural diagram of the flipping of the center positioning part of the composite grinding machine tool for grinding the pin gear housing of the present invention.

[0026] Fig.10 Composite grinding machine tool for grinding pin gear housing of the present invention Fig. 9 A local enlarged schematic diagram of point B in the middle.

[0027] In the figure: grinding machine 100; machine base 101; grinding part 102; sliding base 102a; first grinding machine 102b; first grinding wheel head 102c; compound part 103; second grinding machine 103a; second grinding wheel head 103b; indexing part 104; indexing machine 104a; indexing motor 104b; indexing shaft 104c; workpiece mechanism 200; pin gear housing 201; pin gear outer ring 201a; pin gear inner ring 201b; outer cylindrical surface 201c; tooth groove 201d; inner cylindrical surface 201e; fixed conversion mechanism 300; clamping part 301; workpiece placing plate 301a; clamping groove 301b; sliding square column 301c; Hydraulic rod 301d; chuck folding part 302; storage groove 302a; storage shaft 302b; chuck 302c; center positioning part 303; positioning mounting plate 303a; positioning shaft 303b; return torsion spring 303c; positioning extension rod 303d; positioning protrusion 303e; positioning toggle rod 303f; linkage adjustment part 304; linkage slider 304a; linkage extension rod 304b; linkage extrusion head 304c; linkage triangle block 304d; limiting part 305; spring groove 305a; limiting spring 305b; limiting frame 305c; extrusion inclined groove 305d; through hole 305e; threaded extrusion rod 305f. DETAILED DESCRIPTION

[0028] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the specific implementation methods of the present invention are described in detail below in conjunction with the accompanying drawings.

[0029] In the following description, many specific details are set forth to facilitate a full understanding of the present invention, but the present invention may also be implemented in other ways different from those described herein, and those skilled in the art may make similar generalizations without violating the connotation of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0030] Secondly, the term "one embodiment" or "embodiment" as used herein refers to a specific feature, structure, or characteristic that may be included in at least one implementation of the present invention. The term "in one embodiment" that appears in different places in this specification does not necessarily refer to the same embodiment, nor does it refer to a separate or selective embodiment that is mutually exclusive with other embodiments.

[0031] Secondly, the present invention is described in detail with reference to the schematic diagram. When describing the embodiments of the present invention in detail, for the sake of convenience, the cross-sectional diagrams showing the device structure will not be partially enlarged according to the general scale, and the schematic diagrams are only examples, which should not limit the scope of protection of the present invention. In addition, in actual production, the three-dimensional dimensions of length, width and depth should be included. Example

[0032] Reference Figure 1 to Figure 6 , which is the first embodiment of the present invention, provides a composite grinding machine tool for grinding a pin gear housing, the device comprising: The grinding machine tool 100 includes a machine base 101, a grinding part 102 disposed on the machine base 101, a compound part 103 disposed on the grinding part 102, and a dividing part 104 disposed on the machine base 101; The workpiece mechanism 200 includes a pin gear housing 201; and The fixed conversion mechanism 300 includes a clamping portion 301 arranged on the dividing portion 104, a clamping head folding portion 302 arranged on the clamping portion 301, a center positioning portion 303 arranged on the clamping portion 301, a linkage adjustment portion 304 arranged on the clamping portion 301, and a limiting portion 305 arranged on the linkage adjustment portion 304.

[0033] During use, the needle tooth housing 201 is placed on the clamping part 301, the clamping part 301 is started to drive the clamping head folding part 302 to move, the clamping head folding part 302 drives the limiting part 305 to move the linkage adjustment part 304, the linkage adjustment part 304 pushes the center positioning part 303 to flip, the center positioning part 303 squeezes the needle tooth housing 201, the needle tooth housing 201 is centrally positioned, and fixed at the same time, and then the outer part of the needle tooth housing 201 is ground; After the outer grinding of the needle tooth housing 201 is completed, the chuck folding part 302 is flipped over and the clamping part 301 is continuously contracted. The clamping part 301 drives the chuck folding part 302 to move, thereby clamping and fixing the outer cylindrical surface of the needle tooth housing 201. While the clamping part 301 contracts, it drives the limiting part 305 to make the linkage adjustment part 304 continue to move along the center positioning part 303. When the chuck folding part 302 is clamped and fixed, the limiting part 305 releases the limiting of the linkage adjustment part 304, and the center positioning part 303 is automatically reset, and then the inside of the needle tooth housing 201 is ground. Example

[0034] Reference Figure 1~Figure 4 , which is the second embodiment of the present invention. This embodiment is different from the first embodiment in that: the grinding part 102 includes a sliding base 102a arranged on the machine base 101, a first grinding wheel machine 102b arranged on the sliding base 102a, and a first grinding wheel head 102c arranged on the first grinding wheel machine 102b; wherein, the sliding base 102a is slidably arranged on the machine base 101, and the sliding base 102a is controlled by the machine base 101 to slide on the machine base 101, so that the first grinding wheel machine 102b can extend into the needle tooth housing 201, so as to perform grinding operations, and the first grinding wheel machine 102b is slidably arranged on the sliding base 102a, and the use of the first grinding wheel head 102c and the second grinding wheel head 103b can be switched.

[0035] The composite part 103 includes a second grinder 103a disposed on the first grinder 102b and a second grinding wheel head 103b disposed on the second grinder 103a; wherein the second grinder 103a is fixedly disposed on the first grinder 102b to provide power for the second grinding wheel head 103b to grind.

[0036] Preferably, the second grinding wheel machine 103a drives the second grinding wheel head 103b to rotate at high speed and move up and down to grind the tooth groove 201d on the needle tooth housing 201. After one tooth groove 201d is ground, the needle tooth housing 201 rotates and indexes so that the second grinding wheel head 103b grinds the next tooth groove 201d. After all the tooth grooves 201d on the needle tooth housing 201 are ground, the sliding base 102a is controlled to make 120c grind the inner circular surface 201e and the outer circular surface 201c on the needle tooth housing 201. The inner circular surface 201e and the outer circular surface 201c of the needle tooth housing 201 can be ground without changing the fixture.

[0037] The indexing part 104 includes an indexing machine 104a arranged on the machine base 101, an indexing motor 104b arranged on the machine base 101 and connected to the indexing machine 104a, and an indexing shaft 104c arranged on the indexing machine 104a; wherein, the indexing machine 104a is fixedly arranged on the machine base 101, the indexing motor 104b is fixedly arranged on the machine base 101, and the output end of the indexing motor 104b is connected to the input end of the indexing machine 104a through a conveyor belt, thereby providing power for the rotation of the indexing shaft 104c, which facilitates the rotation and indexing of the pin gear housing 201.

[0038] The needle gear housing 201 includes a needle gear outer ring 201a, a needle gear inner ring 201b arranged on the needle gear outer ring 201a, an outer circumferential surface 201c arranged on the needle gear outer ring 201a, a tooth groove 201d arranged in the needle gear inner ring 201b, and an inner circumferential surface 201e arranged in the needle gear inner ring 201b.

[0039] The remaining structures are the same as those of Example 1.

[0040] During use, the pin gear housing 201 is fixed to the output end of the indexing machine 104a by the fixed conversion mechanism 300. When the tooth groove 201d needs to be ground, the second grinding wheel machine 103a is started to drive the second grinding wheel head 103b to rotate at high speed. The position of the second grinding wheel head 103b is adjusted by the sliding base 102a so that the second grinding wheel head 103b extends into the pin gear inner ring 201b, thereby performing the grinding operation. The indexing motor 104b is started to drive the indexing machine 104a to rotate. The output end of the indexing machine 104a drives the fixed conversion mechanism 300 to rotate, thereby adjusting the grinding indexing of the needle tooth housing 201; when it is necessary to grind the outer cylindrical surface 201c and the inner cylindrical surface 201e, the first grinding wheel head 102c is started to rotate at high speed through the clamping conversion of the fixed conversion mechanism 300. Similarly, the position of the sliding base 102a and the indexing of the needle tooth housing 201 are adjusted to enable the first grinding wheel head 102c to grind the outer cylindrical surface 201c and the inner cylindrical surface 201e. Example

[0041] Reference Figure 3~Figure 10 , which is the third embodiment of the present invention. This embodiment is different from the second embodiment in that: the clamping portion 301 includes a workpiece placement plate 301a arranged on the indexing shaft 104c, a clamping groove 301b arranged on the workpiece placement plate 301a, a sliding square column 301c arranged in the clamping groove 301b, and a hydraulic rod 301d arranged on the indexing shaft 104c and connected to the sliding square column 301c; wherein, the workpiece placement plate 301a is fixed to the indexing shaft 104c by bolts, at least three clamping grooves 301b are opened to ensure the stability of clamping, the sliding square column 301c is slidably arranged in the clamping groove 301b, and the hydraulic rod 301d is fixedly arranged on the indexing shaft 104c to provide power for the movement of the sliding square column 301c.

[0042] The chuck folding portion 302 includes a storage groove 302a arranged on the sliding square column 301c, a storage shaft 302b arranged in the storage groove 302a, a chuck 302c arranged on the storage shaft 302b, and a storage motor 302d arranged on the sliding square column 301c and connected to the storage shaft 302b; wherein, the storage groove 302a is opened at the top of the sliding square column 301c to provide space for the storage of the chuck 302c, and the folding storage of the chuck 302c can ensure the normal grinding operation of the outer cylindrical surface 201c, the storage shaft 302b is rotatably arranged in the storage groove 302a, the chuck 302c is fixedly arranged at the end of the storage shaft 302b, and the chuck 302c is designed in an L shape to ensure that the parallel movement of the chuck 302c can squeeze and fix the needle tooth housing 201.

[0043] The center positioning part 303 includes a positioning mounting plate 303a arranged on the workpiece placement plate 301a, a positioning shaft 303b arranged on the positioning mounting plate 303a, a return torsion spring 303c arranged on the positioning shaft 303b, a positioning extension rod 303d arranged on the positioning shaft 303b, a positioning convex head 303e arranged on the positioning extension rod 303d and matched with the tooth groove 201d, and a positioning toggle rod 303f arranged on the positioning shaft 303b; wherein the positioning mounting plate 303a is fixed on the inner ring of the workpiece placement plate 301a, and is used to install the positioning shaft 303b, and the positioning shaft 303b is arranged in a crankshaft. The fixing point of the positioning mounting plate 303a can be made away from the needle tooth housing 201, thereby providing space for the movement of the limiting part 305 to ensure the normal operation of the device. One end of the reset torsion spring 303c is fixed on the positioning mounting plate 303a, and the other end is fixed on the positioning shaft 303b to provide power for resetting the positioning shaft 303b. The positioning extension rod 303d is fixed on the positioning shaft 303b, and the positioning boss 303e is fixed on the positioning extension rod 303d. The setting of the positioning boss 303e not only increases the stability of the fixation of the needle tooth housing 201, but also prevents the needle tooth housing 201 from rotating, thereby ensuring the stability and accuracy of the grinding of the device.

[0044] The linkage adjustment part 304 includes a linkage slider 304a slidably set in the workpiece placement plate 301a, a linkage extension rod 304b fixedly set on the linkage slider 304a, a linkage extrusion head 304c fixedly set on the linkage extension rod 304b, and a linkage triangle block 304d fixedly set on the linkage slider 304a; wherein, the sliding setting of the linkage slider 304a enables the sliding square column 301c to drive the linkage slider 304a to move, thereby ensuring the normal operation of the device; the linkage extension rod 304b is set in an L shape, so that the linkage extrusion head 304c and the positioning toggle rod 303f are in the same plane, thereby ensuring the normal operation of the device; the linkage extrusion head 304c is set in an elliptical shape, and the arc surfaces on both sides are convenient for extruding the positioning toggle rod 303f, so that the positioning toggle rod 303f rotates, thereby increasing the smoothness of the device.

[0045] The limiting part 305 includes a spring groove 305a arranged on the sliding square column 301c, a limiting spring 305b fixedly arranged in the spring groove 305a, and a limiting frame 305c fixedly arranged on the limiting spring 305b. The bottom end of the limiting frame 305c is a triangular block, so that the movement of the limiting frame 305c can drive the linkage triangular block 304d to move, thereby ensuring the normal operation of the device. Due to the setting of the triangle, when the sliding square column 301c is reset, the sliding square column 301c drives the limiting frame 305c to reset, and the inclined surface of the linkage triangular block 304d squeezes the inclined surface at the bottom of the limiting frame 305c, so that the limiting frame 305c is reset to the front of the linkage triangular block 304d, so that the limiting frame 305c can drive the linkage triangular block 304d to move when it moves next time, thereby ensuring the normal use of the device next time. The extrusion bevel groove 305d on the workpiece placement plate 301a, the through hole 305e arranged on the limit frame 305c and connected to the extrusion bevel groove 305d, the threaded extrusion rod 305f arranged on the workpiece placement plate 301a and adapted to the through hole 305e, the setting of the extrusion bevel groove 305d, the threaded extrusion rod 305f extruding the inclined surface of the extrusion bevel groove 305d, can make the limit frame 305c rise, thereby releasing the limit between the limit frame 305c and the linkage triangular block 304d, the threaded extrusion rod 305f is threadedly connected to the workpiece placement plate 301a, and the position of the threaded extrusion rod 305f can be adjusted, thereby adjusting the position of the limit frame 305c and the linkage triangular block 304d to release the limit, ensuring that when the chuck 302c clamps the fixed needle gear housing 201, the limit of the linkage triangular block 304d can be released, thereby ensuring the normal operation of the device.

[0046] The remaining structure is the same as that of Example 2.

[0047] During use, the needle tooth housing 201 is placed on the workpiece placement plate 301a, and the hydraulic rod 301d is started to drive the sliding square column 301c to move the limit frame 305c, and the limit frame 305c drives the linkage triangle block 304d to move the linkage slider 304a, and the linkage slider 304a drives the linkage extension rod 304b to move the linkage extrusion head 304c, and the linkage extrusion head 305b squeezes the positioning toggle rod 303f to rotate the positioning shaft 303b, and the positioning shaft 303b drives the positioning extension rod 303d to squeeze the positioning convex head 303e to squeeze the tooth groove 201d, so as to center and fix the needle tooth housing 201, and then grind the outer cylindrical surface 201c of the needle tooth housing 201; After the grinding of the outer cylindrical surface 201c is completed, the chuck 302c is rotated 180 degrees, and the hydraulic rod 301d is continuously contracted. Similarly, the hydraulic rod 301d drives the linkage extrusion head 304c to move, and the linkage extrusion head 304c moves along the positioning toggle rod 303f. When the chuck 302c squeezes and fixes the pin gear housing 201, the threaded extrusion rod 305f squeezes the extrusion inclined groove 305d to make the limit frame 305c contract along the spring groove 305a, thereby releasing the limit of the linkage triangular block 304d by the limit frame 305c, and the elastic force of the reset torsion spring 303c drives the positioning shaft 303b to reset the positioning convex head 303e, and at the same time, the positioning shaft 303b drives the positioning toggle rod 303f to reset the linkage extrusion head 304c, and the linkage extrusion head 304c drives the linkage slider 304a to reset. After the reset is completed, the inner cylindrical surface 201e of the pin gear housing 201 is ground.

[0048] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention rather than to limit it. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solutions of the present invention may be modified or replaced by equivalents without departing from the spirit and scope of the technical solutions of the present invention, which should all be included in the scope of the claims of the present invention.

Claims

1. A composite grinding machine tool for grinding a pinion housing, characterized in that: include, A grinding machine tool (100) comprises a machine base (101), a grinding portion (102) arranged on the machine base (101), a compound portion (103) arranged on the grinding portion (102), and a dividing portion (104) arranged on the machine base (101); A workpiece mechanism (200) comprises a pin gear housing (201); The fixed conversion mechanism (300) comprises a clamping portion (301) arranged on the indexing portion (104), a clamping head folding portion (302) arranged on the clamping portion (301), a center positioning portion (303) arranged on the clamping portion (301), a linkage adjustment portion (304) arranged on the clamping portion (301), and a limiting portion (305) arranged on the linkage adjustment portion (304).

2. The compound grinding machine tool for grinding a pin gear housing according to claim 1, characterized in that: The grinding section (102) comprises a sliding base (102a) arranged on the machine base (101), a first grinding wheel machine (102b) arranged on the sliding base (102a), and a first grinding wheel head (102c) arranged on the first grinding wheel machine (102b).

3. The compound grinding machine tool for grinding a pin gear housing according to claim 2, characterized in that: The composite part (103) comprises a second grinding machine (103a) arranged on the first grinding machine (102b), and a second grinding wheel head (103b) arranged on the second grinding machine (103a).

4. The compound grinding machine tool for grinding a pin gear housing according to claim 3, characterized in that: The indexing part (104) comprises an indexing machine (104a) arranged on the machine base (101), an indexing motor (104b) arranged on the machine base (101) and connected to the indexing machine (104a), and an indexing shaft (104c) arranged on the indexing machine (104a).

5. The compound grinding machine tool for grinding a pin gear housing according to claim 4, characterized in that: The needle tooth housing (201) comprises a needle tooth outer ring (201a), a needle tooth inner ring (201b) arranged on the needle tooth outer ring (201a), an outer circumferential surface (201c) arranged on the needle tooth outer ring (201a), a tooth groove (201d) arranged in the needle tooth inner ring (201b), and an inner circumferential surface (201e) arranged in the needle tooth inner ring (201b).

6. The compound grinding machine tool for grinding a pin gear housing according to claim 5, characterized in that: The clamping portion (301) comprises a workpiece placement plate (301a) arranged on the indexing shaft (104c), a clamping groove (301b) arranged on the workpiece placement plate (301a), a sliding square column (301c) arranged in the clamping groove (301b), and a hydraulic rod (301d) arranged on the indexing shaft (104c) and connected to the sliding square column (301c).

7. The compound grinding machine tool for grinding a pin gear housing according to claim 6, characterized in that: The clamp folding portion (302) comprises a storage groove (302a) arranged on the sliding square column (301c), a storage rotating shaft (302b) arranged in the storage groove (302a), and a clamp (302c) arranged on the storage rotating shaft (302b).

8. The compound grinding machine tool for grinding a pin gear housing according to claim 7, characterized in that: The central positioning portion (303) comprises a positioning mounting plate (303a) arranged on the workpiece placement plate (301a), a positioning rotating shaft (303b) arranged on the positioning mounting plate (303a), a return torsion spring (303c) arranged on the positioning rotating shaft (303b), a positioning extension rod (303d) arranged on the positioning rotating shaft (303b), a positioning protrusion (303e) arranged on the positioning extension rod (303d) and adapted to the tooth groove (201d), and a positioning toggle rod (303f) arranged on the positioning rotating shaft (303b).

9. The compound grinding machine tool for grinding a pin gear housing according to claim 8, characterized in that: The linkage adjustment part (304) comprises a linkage slider (304a) arranged in the workpiece placement plate (301a), a linkage extension rod (304b) arranged on the linkage slider (304a), a linkage extrusion head (304c) arranged on the linkage extension rod (304b), and a linkage triangle block (304d) arranged on the linkage slider (304a).

10. The compound grinding machine tool for grinding a pin gear housing according to claim 9, characterized in that: The limiting portion (305) comprises a spring groove (305a) arranged on the sliding square column (301c), a limiting spring (305b) arranged in the spring groove (305a), a limiting frame (305c) arranged on the limiting spring (305b), an extrusion inclined groove (305d) arranged on the limiting frame (305c), a through hole (305e) arranged on the limiting frame (305c) and connected to the extrusion inclined groove (305d), and a threaded extrusion rod (305f) arranged on the workpiece placement plate (301a) and adapted to the through hole (305e).

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