Positioning mechanism for cycloidal gear double-piece gear grinding

Abstract

The utility model provides a positioning mechanism for cycloidal gear double-piece gear grinding, and relates to the technical field of cycloidal gear machining, the positioning mechanism comprises a positioning body used for installing the whole positioning mechanism on a machine tool, and an oil cylinder connected with the machine tool is arranged in the positioning body; the cycloidal gear supporting seat is coaxially arranged at one end of the positioning body and detachably and fixedly connected with the positioning body, and the center of the cycloidal gear supporting seat extends to form a cone mandrel; the two liquid expansion mandrels are embedded in the cycloidal gear supporting seat, and the expansion degree can be adjusted; a pull rod is coaxially embedded in the center expansion sleeve, and a limiting conical groove matched with the conical core shaft is formed between the pull rod and the center expansion sleeve; and the pull rod penetrates through the cone mandrel and the cycloidal gear supporting seat and is linked with the positioning body. Compared with a traditional mode that a diamond pin and a steel ball are adopted to conduct angular positioning on the cycloidal gear, the positioning mechanism is simple in structure, reasonable in design and convenient to operate.

Description

Technical Field

[0001] The utility model relates to the technical field of cycloid wheel processing, in particular to a positioning mechanism for double-piece grinding teeth of a cycloid wheel. Background Art

[0002] In RV reducers, the precise matching of cycloid wheels is the core performance guarantee of RV reducers, so it is particularly important to ensure the consistency of the two cycloid wheels in a reducer. When producing cycloid wheels, the requirements for span, angular deviation, and tooth shape are quite high. Therefore, in the case of mass production, in order to reduce matching work and improve assembly efficiency, it is necessary to process in pairs.

[0003] At present, the cycloid wheels for double crankshafts are processed in pairs, because the upper and lower cycloid wheels are exactly the same, so the processing difficulty is not great. However, for the cycloid wheels with three bearing holes, such as Figure 1 As shown, the cycloid wheel 1 and the cycloid wheel 2 are both provided with a center hole 3, a bearing hole 4, and an avoidance hole 5. The center hole 3 has the largest inner diameter, followed by the avoidance hole 5, and the bearing hole 4 has the smallest inner diameter. There are three bearing holes 4. After the two cycloid wheels in the RV reducer are installed and positioned, there is a difference in the angular relative position relationship between the bearing hole and the outer peripheral gear ring. That is to say, when the bearing holes completely overlap, there is a half-tooth angle deviation between the upper and lower cycloid wheels 1 and 2. In addition, the difference between the bearing hole and the avoidance hole makes it difficult to clamp the cycloid wheel 1 and 2 together. When the upper cycloid wheel can be clamped, the lower cycloid wheel often cannot pass the tooling. At the same time, the upper and lower cycloid wheel deflection requirements of 15 arc seconds are difficult to guarantee.

[0004] Traditionally, diamond pins and steel balls are generally used to determine the angular orientation of the cycloid wheel. For example, the announcement number CN219520716U is a positioning mechanism for a pair of cycloid wheel grinding gears used for simultaneously processing three bearing holes. In this positioning mechanism, a side block with a ball plunger is provided. The elastic steel ball of the ball plunger has a spring inside to achieve expansion and contraction, which can eliminate the gap between the bearing hole wall and the positioning arc surface, making the side block completely flush with the base, ensuring that the positioning position is fixed each time. However, this method of using diamond pins and steel balls for angular positioning is simple in structure and is easily damaged after being compressed multiple times, making this positioning mechanism less suitable for applications that require lower precision and relatively less stable.

[0005] The utility model aims to provide a positioning mechanism for cycloid wheel gear grinding, which can process two cycloid wheels in pairs. Utility Model Content

[0006] In view of the shortcomings of the prior art, the utility model aims to propose a positioning mechanism for a cycloid wheel double-piece grinding gear, and the specific scheme is as follows:

[0007] A positioning mechanism for a cycloidal wheel double-blade gear grinding, the positioning mechanism comprising:

[0008] The positioning body is used to install the entire positioning mechanism on the machine tool, and has a built-in oil cylinder connected to the machine tool;

[0009] A cycloid wheel support seat is coaxially arranged at one end of the positioning body and is detachably fixedly connected to the positioning body, and a conical core shaft is formed by extending from the center;

[0010] There are two hydraulic expansion mandrels, both embedded in the cycloid wheel support seat, and the expansion degree can be adjusted;

[0011] The central expansion sleeve has a pull rod coaxially embedded inside, and a limiting conical groove matched with the cone core shaft is formed between the pull rod and the central expansion sleeve;

[0012] The pull rod is penetrated by the cone core shaft, the cycloid wheel support seat and the positioning body in linkage.

[0013] Therefore, before processing, the liquid expansion mandrel and the center expansion sleeve are both in a relaxed state. During processing, first install the cycloid wheel 2 into the lower side of the cycloid wheel support seat, one of the bearing holes passes through one of the liquid expansion mandrels, and the center hole passes through the center expansion sleeve. Then install the cycloid wheel 1 to the upper side of the cycloid wheel 2, and the bearing hole at the same position as the cycloid wheel 2 passes through another liquid expansion mandrel, and the center hole passes through the center expansion sleeve. Then control the expansion degree of the two liquid expansion mandrels to be consistent, and support the corresponding cycloid wheels with the same tensioning force to ensure angular accuracy. Since the positions of the liquid expansion mandrel and the center expansion sleeve have been preset in advance, the relative position relationship between the two cycloid wheels has been determined when they are on the cycloid wheel support seat.

[0014] Afterwards, the machine tool controls the pulling force of the center expansion sleeve, and the machine tool controls the oil cylinder to pull down the positioning body. Since the pull rod is linked with the positioning body, the pull rod presses down the center expansion sleeve, and the conical core shaft is in the limited conical groove to expand the center expansion sleeve, and then the center expansion sleeve tightens the center holes of the two cycloid wheels. At this point, the two cycloid wheels are centering and angularly determined by the cooperation of two liquid expansion core shafts and a center expansion sleeve, which is convenient for the subsequent tooth groove processing of the two cycloid wheels.

[0015] Furthermore, a plurality of fastening bolts are wound around the cycloid wheel support seat, and the fastening bolts are threadedly connected to the positioning body at the same time.

[0016] Therefore, by the cooperation of the fastening bolts and the positioning body, the cycloid wheel support seat can be detachably fixedly installed on the positioning body, which is convenient for installation and disassembly.

[0017] Furthermore, two angular positioning holes are provided on the cycloid wheel support seat, and a liquid expansion mandrel is provided in the angular positioning holes;

[0018] A reverse tightening bolt is arranged at the lower end of the hydraulic expansion core shaft in the angular positioning hole, the reverse tightening bolt thread is penetrated in the hydraulic expansion core shaft, and a gasket is arranged between the reverse tightening bolt and the hydraulic expansion core shaft.

[0019] Therefore, the positioning of the hydraulic mandrel is achieved by opening an angular positioning hole at a specific position on the cycloidal wheel support seat. In addition, when the hydraulic mandrel is placed in the angular positioning hole, the stability of the hydraulic mandrel in the angular positioning hole is ensured by the cooperation of the reverse tightening bolt, the gasket and the hydraulic mandrel.

[0020] Furthermore, the liquid expansion mandrel is interference fit with the angular positioning hole, and the interference amount is 0.005-0.01.

[0021] Thus, the liquid expansion core shaft is pressed into the angular positioning hole, which is convenient for installation.

[0022] Furthermore, a pressure bolt is threadedly provided on the upper end of the hydraulic expansion core shaft.

[0023] The liquid expansion mandrel is a thin-walled liquid expansion mandrel, which is essentially an existing liquid expansion clamp. The interior of the clamp is filled with liquid medium. Based on the characteristics of the liquid medium, the working surface of the clamp can be elastically deformed, and annular clamping can be performed with uniform clamping force. Therefore, the expansion degree of the liquid expansion mandrel can be adjusted by adjusting the number of rotations of the pressure bolts on the two liquid expansion mandrels.

[0024] Furthermore, the surface of the pressure bolt is provided with an annular scale.

[0025] Thereby, the two pressure bolts are rotated to a fixed scale according to the annular scale to ensure angular accuracy.

[0026] Furthermore, with the pull rod as the center line, the central expansion sleeve includes a plurality of elastic tensioning sheets arranged around it.

[0027] Therefore, when the pull rod presses down the center expansion sleeve, the elastic tensioning sheets will be squeezed by the cone core shaft and will be stretched outward one by one, so that the center expansion sleeve is tightened at the center hole.

[0028] Furthermore, an abutment plate is integrally formed on the outer wall of the pull rod, and a clamping spring spaced apart from the abutment plate is also clamped on the outer wall of the pull rod;

[0029] The position between the abutment plate and the clamping spring is used to clamp one end of the elastic tensioning sheet.

[0030] Therefore, the elastic tensioning sheet is limited by providing the abutment plate and the retaining spring, and the central expansion sleeve can be stably mounted on the pull rod based on the axial limiting property of the retaining spring.

[0031] Furthermore, a threaded groove is provided on the outer wall of one end of the pull rod away from the central expansion sleeve, and the positioning body is correspondingly provided with a threaded hole adapted to the pull rod.

[0032] Therefore, after the thread groove is meshed with the threaded hole, the pull rod and the positioning body can be linked, so that the pull rod can perform a downward pulling action along with the positioning body.

[0033] Furthermore, the conical core shaft and the angular positioning hole on the cycloidal wheel support seat are formed by one-time positioning processing, and the conical core shaft, the angular positioning hole and the cycloidal wheel support seat form an integrated structure.

[0034] Thus, the high-precision positioning of the center holes and bearing holes of the cycloidal wheel 1 and the cycloidal wheel 2 can be ensured, and at the same time, the axis of the conical surface of the conical core shaft surface and the positioning end face have high verticality.

[0035] Compared with the prior art, the beneficial effects of the utility model are as follows:

[0036] Because of the provision of this positioning mechanism, compared with the traditional method of using diamond pins and steel balls to angularly position the cycloid wheel, the utility model has a simple structure, reasonable design, and easy operation. It only needs to control the tightening of the liquid expansion mandrel and the center expansion sleeve to achieve the angular positioning of the two cycloid wheels, and the liquid expansion mandrel and the center expansion sleeve can contact the bearing hole and the center hole of the cycloid wheel with the entire surface, so it has good stability, can effectively solve the problem of paired processing accuracy of the cycloid wheel with three bearing holes, realize high-precision angular positioning, greatly reduce the pairing pressure, and at the same time improve the processing efficiency, which provides great help for mass production. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] Figure 1 It is a schematic diagram of the state when the external teeth of the cycloid wheel 1 and the cycloid wheel 2 in the background technology overlap;

[0038] Figure 2 It is an overall schematic diagram of a cycloidal wheel 1 and a cycloidal wheel 2 installed on the positioning mechanism of the utility model;

[0039] Figure 3 for Figure 2 It is a top view;

[0040] Figure 4 For along Figure 3 Sectional view along line AA;

[0041] Figure 5 For along Figure 3 Cross-section taken along line BB.

[0042] Figure numerals: 1. cycloidal wheel one; 2. cycloidal wheel two; 3. center hole; 4. bearing hole; 5. avoidance hole; 6. positioning body; 61. threaded hole; 7. cycloidal wheel support seat; 71. conical core shaft; 72. angular positioning hole; 8. liquid expansion core shaft; 9. center expansion sleeve; 91. elastic tensioning plate; 10. pull rod; 101. abutment plate; 102. threaded groove; 11. fastening bolt; 12. reverse tensioning bolt; 13. pressure bolt; 14. retaining spring; 15. limiting conical groove. DETAILED DESCRIPTION

[0043] The present invention will be further described in detail below in conjunction with the embodiments and drawings, but the implementation methods of the present invention are not limited thereto.

[0044] like Figure 2 As shown, the utility model proposes a positioning mechanism for double-piece grinding of a cycloidal wheel, which is used in the processing of the cycloidal wheel in the RV reducer. Through this positioning mechanism, the tooth grooves of the two cycloidal wheels can be processed while achieving angular positioning of the two cycloidal wheels with differences.

[0045] It should be noted that the two cycloidal wheels are cycloidal wheel 1 and cycloidal wheel 2, and both cycloidal wheel 1 and cycloidal wheel 2 are provided with a center hole 3, a bearing hole 4 and an avoidance hole 5. The center hole 3 has the largest inner diameter, the avoidance hole 5 is the second, and the bearing hole 4 is the smallest, and there are three bearing holes 4.

[0046] Since both cycloid wheels have avoidance holes 5 through which the bearing holes 4 can be completely exposed, the bearing holes 4 of the cycloid wheels 1 and 2 can be exposed at the same time by calculating the fixed rotation angle, thereby ensuring that the positioning mechanism can be used. At this time, the angle deviation accuracy is required to be accurate to 0.0001 degrees.

[0047] from Figure 3 It can be seen from the figure that, precisely because of the difference between cycloidal wheel 1 and cycloidal wheel 2, when the outer teeth of cycloidal wheel 1 and cycloidal wheel 2 coincide with each other, the bearing hole 4 and avoidance hole 5 on cycloidal wheel 1 will not coincide with the bearing hole 4 and avoidance hole 5 on cycloidal wheel 2, and only the center hole 3 on the two cycloidal wheels will coincide with each other.

[0048] In this regard, for the two cycloidal wheels, the positioning mechanism of the utility model applies tensioning force to the bearing holes 4 and the center hole 3 on the two cycloidal wheels respectively based on the principle that structural deformation can generate tensioning force, thereby supporting the cycloidal wheels and achieving angular positioning, which is convenient for subsequent tooth groove processing.

[0049] Specifically, combined Figure 2 picture, Figure 4 , Figure 5 The positioning mechanism includes a positioning body 6, a cycloidal wheel support seat 7, a liquid expansion core shaft 8, a center expansion sleeve 9 and a pull rod 10.

[0050] Among them, the positioning body 6 is a universal part, which is used to install the entire positioning mechanism on the machine tool. It has a built-in cylinder connected to the machine tool. Since the machine tool has a control system, the machine tool can control the lifting of the cylinder, and the lifting of the cylinder can drive the positioning body 6 to lift.

[0051] The cycloid wheel support seat 7 is cylindrical as a whole and is coaxially arranged at one end of the positioning body 6. Specifically, at least four M8 fastening bolts 11 are wound around the cycloid wheel support seat 7, and the fastening bolts 11 are threadedly connected to the positioning body 6. Through the cooperation of the fastening bolts 11 and the positioning body 6, the cycloid wheel support seat 7 can be detachably fixed on the positioning body 6, which is convenient for installation and disassembly.

[0052] The cycloid wheel support seat 7 is located away from the positioning body 6, and a conical core shaft 71 is formed at the center thereof. Figure 4 It can be seen from the figure that the outer diameter of the conical core shaft 71 gradually decreases in the direction away from the cycloid wheel support seat 7, and the conical core shaft 71 is used to cooperate with the center expansion sleeve 9.

[0053] like Figure 5 In order to install the hydraulic expansion mandrel 8, two angular positioning holes 72 are opened on the cycloidal wheel support seat 7. The angular positioning holes 72 are used to install the hydraulic expansion mandrel 8. By pre-calculating the positions of the two angular positioning holes 72, the positions of the two hydraulic expansion mandrels 8 can be pre-positioned.

[0054] It should be noted that the conical core shaft 71 and the angular positioning hole 72 on the cycloidal wheel support seat 7 are formed by one-time positioning processing. The conical core shaft 71, the angular positioning hole 72 and the cycloidal wheel support seat 7 are an integrated structure, which can ensure the high-precision positioning of the center hole 3 and the bearing hole 4 when the cycloidal wheel 1 and the cycloidal wheel 2 are installed on the cycloidal wheel support seat 7. At the same time, the axis of the cone surface on the conical core shaft 71 has a high degree of perpendicularity to the end face of the cycloidal wheel support seat 7.

[0055] Correspondingly, two hydraulic expansion mandrels 8 are provided, and each hydraulic expansion mandrel 8 is interference fit with the corresponding angular positioning hole 72, and the interference amount is 0.005-0.01, so that the hydraulic expansion mandrel 8 can be pressed into the angular positioning hole 72, which is convenient for installation.

[0056] In order to improve the stability of the hydraulic expansion core shaft 8 on the cycloid wheel support seat 7, a reverse tightening bolt 12 of model M8 is provided at the lower end of the hydraulic expansion core shaft 8 in the angular positioning hole 72. The reverse tightening bolt 12 is threadedly penetrated into the hydraulic expansion core shaft 8, and a gasket is provided between the reverse tightening bolt 12 and the hydraulic expansion core shaft 8. The stability of the hydraulic expansion core shaft 8 in the angular positioning hole 72 is ensured by the cooperation of the reverse tightening bolt 12, the gasket and the hydraulic expansion core shaft 8.

[0057] from Figure 5It can be seen that the liquid expansion mandrel 8 is partially embedded in the cycloidal wheel support seat 7. The liquid expansion mandrel 8 is a thin-walled liquid expansion mandrel 8, which is essentially an existing liquid expansion clamp, such as the external expansion clamp of the brand 100% clamp. The interior of the clamp is filled with liquid medium. Based on the characteristics of the liquid medium, the working surface of the clamp can be elastically deformed and expanded, and an annular clamp can be performed with uniform clamping force. In order to adjust the tension of the liquid expansion mandrel 8, a pressure bolt 13 is threaded through the upper end of the liquid expansion mandrel 8, and the surface of the pressure bolt 13 is provided with an annular scale. By setting a fixed scale, the number of rotations of the pressure bolt 13 is limited, and the expansion degree of the liquid expansion mandrel 8 can be adjusted.

[0058] After the two pressure bolts 13 are rotated to a fixed scale according to the annular scale, the tensioning force of the hydraulic expansion core shaft 8 is determined to support the bearing hole 4, thereby fixing the positions of the cycloid wheel 1 and the cycloid wheel 2 to ensure angular accuracy.

[0059] In order to apply a tensioning force to the center holes 3 of the cycloidal wheels 1 and 2, a pull rod 10 is coaxially embedded in the center expansion sleeve 9. The pull rod 10 and the center expansion sleeve 9 are clearance-matched. With the pull rod 10 as the center line, the center expansion sleeve 9 includes a plurality of elastic tensioning sheets 91 arranged around. In order to stably install the elastic tensioning sheets 91, an abutment plate 101 is integrally formed on the outer wall of the pull rod 10. A retaining spring 14 is also clamped on the outer wall of the pull rod 10 and is spaced apart from the abutment plate 101. The position between the abutment plate 101 and the retaining spring 14 is used to clamp one end of the elastic tensioning sheet 91. The elastic tensioning sheet 91 is limited by setting the abutment plate 101 and the retaining spring 14. Based on the axial limiting characteristic of the retaining spring 14, the center expansion sleeve 9 can be stably mounted on the pull rod 10.

[0060] like Figure 5 A limiting conical groove 15 that cooperates with the conical core shaft 71 is formed between the pull rod 10 and the center expansion sleeve 9. When the pull rod 10 presses down the center expansion sleeve 9, the elastic tensioning sheets 91 are squeezed by the conical core shaft 71 and will be stretched outward one by one, thereby realizing the tensioning of the center expansion sleeve 9 at the center hole 3 to ensure the centering accuracy.

[0061] In order to realize the downward pressing action of the pull rod 10, a threaded groove 102 is provided on the outer wall of the end of the pull rod 10 away from the center expansion sleeve 9, and the positioning body 6 is correspondingly provided with a threaded hole 61 adapted to the pull rod 10. After the end of the pull rod 10 with the threaded groove 102 is passed through the conical core shaft 71 and the cycloidal wheel support seat 7, the threaded groove 102 engages with the threaded hole 61 to realize the linkage between the pull rod 10 and the positioning body 6, so that the pull rod 10 can perform a downward pulling action with the positioning body 6.

[0062] In summary, in the process of processing the cycloid wheel, before processing, the liquid expansion core shaft 8 and the center expansion sleeve 9 are in a relaxed state. During processing, the cycloid wheel 2 is first installed into the lower side of the cycloid wheel support seat 7, one of the bearing holes 4 passes through one of the liquid expansion core shafts 8, and the center hole 3 passes through the center expansion sleeve 9, and then the cycloid wheel 1 is installed to the upper side of the cycloid wheel 2, and the bearing hole 4 at the same position as the cycloid wheel 2 passes through another liquid expansion core shaft 8, and the center hole 3 passes through the center expansion sleeve 9. At this time, the relative positions of the cycloid wheel 1 and the cycloid wheel 2 are determined.

[0063] Afterwards, the expansion degrees of the two hydraulic expansion mandrels 8 are controlled to be consistent, and the corresponding cycloid wheels are supported with the same tensioning force to ensure angular accuracy.

[0064] Afterwards, the center expansion sleeve 9 is controlled by the machine tool to control the pulling force, and the machine tool controls the oil cylinder to pull down the positioning body 6. Since the pull rod 10 is linked with the positioning body 6, the pull rod 10 presses down the center expansion sleeve 9, and the conical core shaft 71 is in the limiting conical groove 15, and the center expansion sleeve 9 is stretched open, and then the center expansion sleeve 9 tightens the center holes 3 of the two cycloidal wheels. At this point, the two cycloidal wheels are centering and angularly determined by the cooperation of two liquid expansion core shafts 8 and a center expansion sleeve 9, which is convenient for the subsequent tooth groove processing of the two cycloidal wheels.

[0065] The above is only a preferred embodiment of the present invention. The protection scope of the present invention is not limited to the above embodiments. All technical solutions under the concept of the present invention belong to the protection scope of the present invention. It should be pointed out that for ordinary technicians in this technical field, some improvements and modifications without departing from the principle of the present invention should also be regarded as the protection scope of the present invention.

Claims

1. A positioning mechanism for a cycloid wheel double-blade gear grinding, characterized in that: The positioning mechanism comprises: A positioning body (6) is used to install the entire positioning mechanism on a machine tool, and has a built-in oil cylinder connected to the machine tool; A cycloid wheel support seat (7) is coaxially arranged at one end of the positioning body (6) and is detachably fixedly connected to the positioning body (6), and a conical core shaft (71) is extended from the center thereof; There are two liquid expansion mandrels (8), both embedded in the cycloid wheel support seat (7), and the expansion degree can be adjusted; A central expansion sleeve (9) is coaxially embedded with a pull rod (10) therein, and a limiting conical groove (15) that cooperates with the cone core shaft (71) is formed between the pull rod (10) and the central expansion sleeve (9); The pull rod (10) is penetrated by a cone core shaft (71), a cycloid wheel support seat (7) and a positioning body (6) for linkage.

2. The positioning mechanism for the cycloid wheel double-blade gear grinding according to claim 1, characterized in that: A plurality of fastening bolts (11) are wound around the cycloid wheel support seat (7), and the fastening bolts (11) are threadedly connected to the positioning body (6) at the same time.

3. The positioning mechanism of the cycloid wheel double-blade gear grinding according to claim 2, characterized in that: Two angular positioning holes (72) are provided on the cycloid wheel support seat (7), and a liquid expansion core shaft (8) is provided in the angular positioning holes (72); A reverse tightening bolt (12) is provided at the lower end of the hydraulic expansion core shaft (8) in the angular positioning hole (72), the reverse tightening bolt (12) is threadedly inserted into the hydraulic expansion core shaft (8), and a gasket is provided between the reverse tightening bolt (12) and the hydraulic expansion core shaft (8).

4. The positioning mechanism for the cycloid wheel double-blade gear grinding according to claim 3, characterized in that: The liquid expansion core shaft (8) and the angular positioning hole (72) are interference fit, and the interference amount is 0.005-0.

01.

5. The positioning mechanism for the cycloid wheel double-blade gear grinding according to claim 3, characterized in that: A pressure bolt (13) is threadedly inserted into the upper end of the hydraulic expansion core shaft (8).

6. The positioning mechanism for the cycloid wheel double-blade gear grinding according to claim 5, characterized in that: The surface of the pressure bolt (13) is provided with an annular scale.

7. The positioning mechanism for the cycloid wheel double-blade gear grinding according to claim 1, characterized in that: With the pull rod (10) as the center line, the center expansion sleeve (9) includes a plurality of elastic tensioning sheets (91) arranged around it.

8. The positioning mechanism for the cycloid wheel double-blade gear grinding according to claim 7, characterized in that: An abutment plate (101) is integrally formed on the outer wall of the pull rod (10), and a clamping spring (14) is also clamped on the outer wall of the pull rod (10) and spaced apart from the abutment plate (101); The position between the abutting plate (101) and the clamping spring (14) is used to clamp one end of the elastic tensioning sheet (91).

9. The positioning mechanism for the cycloid wheel double-blade gear grinding according to claim 8, characterized in that: A threaded groove (102) is provided on the outer wall of one end of the pull rod (10) away from the central expansion sleeve (9), and the positioning body (6) is correspondingly provided with a threaded hole (61) adapted to the pull rod (10).

10. The positioning mechanism for the cycloid wheel double-blade gear grinding according to claim 3, characterized in that: The cone core shaft (71) and the angular positioning hole (72) on the cycloid wheel support seat (7) are formed by one-time positioning processing, and the cone core shaft (71), the angular positioning hole (72) and the cycloid wheel support seat (7) are an integrated structure.

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