Improved pair gear grinding tool for cycloid wheel

Abstract

This invention discloses an improved cycloidal gear pair grinding fixture, comprising a lower base, a chassis, a lower pin, an upper pin, a center pin, a rear cycloidal wheel, a front cycloidal wheel, a pressure cap, and an upper base. The fixture uses shaped pins to position the cycloidal wheels, and clamping only requires installing the front and rear cycloidal wheels onto the base, eliminating the need for a transition plate and significantly reducing the fixture's weight. This is particularly beneficial for machining large-sized cycloidal wheels, improving machine adjustment and clamping efficiency. The improved cycloidal gear pair grinding fixture described in this invention has a reasonable structure, high fitting accuracy, and convenient clamping, effectively solving the problem of low overall production efficiency in existing cycloidal gear grinding fixtures.

Description

Technical Field

[0001] This invention relates to the field of speed reducer manufacturing equipment, and in particular to an improved cycloidal gear pair grinding fixture. Background Technology

[0002] The cycloidal wheel is a key component in the RV reducer, responsible for transmitting rotational motion to the output of the needle housing. If the grinding angle error between the two cycloidal wheels is too large, it will cause interference between the cycloidal wheel and the needle roller, resulting in the cycloidal reducer jamming. To ensure the stability of motion transmission, the two cycloidal wheels need to be highly matched in angle.

[0003] The existing cycloidal wheel grinding fixture has the following drawbacks: First, the front and rear cycloids are paired for machining, but during clamping, the front and rear cycloid wheels must first be engaged with the intermediate positioning plate using positioning pins before being installed as a whole into the grinding fixture base. This results in a long clamping time, increased overall height of the cycloid wheels, longer grinding wheel path, and longer program time, thus leading to low overall product processing efficiency. Second, the positional accuracy errors caused by the multiple positioning of the fixture, combined with the machining errors of the equipment, cause instability in the cycloid phase angle. Third, because the existing cycloidal wheel grinding fixture adds a transition plate structure, when the cycloid wheel is large, the overall weight of the cycloid wheel and transition plate is heavy, making clamping difficult. If clamped separately, the efficiency is even lower. Summary of the Invention

[0004] The technical problem to be solved by the present invention is: in order to overcome the problems mentioned above, an improved cycloidal gear grinding fixture is provided, which has a reasonable structure and has the advantages of high fit and convenient clamping, effectively solving the problem of low overall production efficiency of existing cycloidal gear grinding fixtures.

[0005] The technical solution adopted by the present invention to solve its technical problem is: an improved cycloidal wheel paired grinding tool, including a lower base, a base plate, a lower pin, an upper pin, a center pin, a rear cycloidal wheel, a front cycloidal wheel, a pressure cap and an upper base, wherein a connecting column is fixedly provided on the upper end surface of the lower base;

[0006] The bottom of the chassis is provided with a connecting hole, and the center of the upper end of the chassis is provided with a central pin hole. A ring of side pin holes is provided around the central pin hole. The connecting column extends into the connecting hole so that the lower base and the chassis are connected to each other.

[0007] Both the rear cycloidal wheel and the front cycloidal wheel have a central hole at their center positions. Both the rear cycloidal wheel and the front cycloidal wheel have a positioning round hole and a positioning triangular hole around the central hole. The positioning round hole and the positioning triangular hole are spaced out in a circle.

[0008] The lower end of the lower pin is inserted into the side pin hole on the chassis, and the upper end of the lower pin is provided with a prismatic block. The thickness of the prismatic block is equal to or less than the thickness of a cycloidal wheel, so that the prismatic block only extends into the positioning hole of the rear cycloidal wheel, thereby achieving the effect of restricting the rotation of the rear cycloidal wheel.

[0009] The lower end of the upper pin is inserted into the side pin hole on the chassis. The upper end of the upper pin is provided with a triangular block. The thickness of the triangular block is equal to or greater than the thickness of the two cycloidal wheels, so that the triangular block can be inserted into the positioning round hole of the rear cycloidal wheel and the positioning triangular hole of the front cycloidal wheel, thereby achieving the effect of restricting the rotation of the rear cycloidal wheel and the front cycloidal wheel.

[0010] The lower end of the center pin is inserted into the center pin hole on the chassis, and the upper end of the center pin is provided with a cylindrical block. The cylindrical block extends into the center holes of the rear cycloidal wheel and the front cycloidal wheel respectively to achieve radial positioning of the cycloidal wheel.

[0011] The pressure cap presses the rear cycloidal wheel and the front cycloidal wheel together from the top. The top of the pressure cap is provided with a groove, and the bottom of the upper base is provided with a protruding ring. The protruding ring extends into the groove so that the upper base and the pressure cap are connected to each other.

[0012] Furthermore, a lower pin separator is provided between the prism block and the lower end of the lower pin, and the prism block, the lower pin, and the lower pin separator are an integral structure.

[0013] Furthermore, an upper pin separator is provided between the triangular block and the lower end of the upper pin, and the triangular block, the upper pin, and the upper pin separator are an integral structure.

[0014] Furthermore, the lower and upper pin separator plates are recessed into the side pin holes to position the lower and upper pins.

[0015] Furthermore, the lower base and the upper base are respectively connected to the gear grinding equipment.

[0016] Furthermore, there are two lower pins and two upper pins. The upper pins are positioned symmetrically to the lower pins and are arranged adjacent to each other to ensure that the two cycloidal wheels are subjected to balanced forces during processing.

[0017] The beneficial effects of this invention are as follows: An improved cycloidal wheel pair grinding fixture includes a lower base, a base plate, a lower pin, an upper pin, a center pin, a rear cycloidal wheel, a front cycloidal wheel, a pressure cap, and an upper base. The fixture uses a special-shaped pin structure to achieve paired processing of the front and rear cycloidal wheels. Clamping only requires installing the front and rear cycloidal wheels onto the base, reducing clamping time. Furthermore, the reduced spacing between the cycloidal wheels reduces the program processing time, thus improving the overall processing efficiency of the cycloidal wheels. At the same time, the elimination of the transition plate significantly reduces the weight of the fixture, especially for the processing of large-sized cycloidal wheels, improving machine adjustment and clamping efficiency. Its reasonable structure has advantages such as high fit and convenient clamping, effectively solving the problem of low overall efficiency of existing cycloidal wheel grinding fixtures. Attached Figure Description

[0018] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0019] Figure 1 This is a schematic diagram of the overall cross-sectional structure of an improved cycloidal wheel paired grinding tool according to the present invention;

[0020] Figure 2 This is an exploded structural diagram of an improved cycloidal wheel paired gear grinding fixture according to the present invention;

[0021] Figure 3 This is a schematic diagram of the lower base structure of an improved cycloidal wheel paired gear grinding fixture according to the present invention;

[0022] Figure 4 This is a schematic diagram of the chassis structure of the improved cycloidal wheel paired gear grinding fixture described in this invention. Figure 1 ;

[0023] Figure 5 This is a schematic diagram of the chassis structure of the improved cycloidal wheel paired gear grinding fixture described in this invention. Figure 2 ;

[0024] Figure 6 This is a schematic diagram of the center pin structure of an improved cycloidal wheel paired grinding tool according to the present invention;

[0025] Figure 7 This is a schematic diagram of the lower pin structure of an improved cycloidal wheel paired grinding tool according to the present invention;

[0026] Figure 8 This is a schematic diagram of the upper pin structure of an improved cycloidal wheel paired grinding tool according to the present invention;

[0027] Figure 9 This is a schematic diagram of the upper and lower pins of the improved cycloidal wheel gear grinding fixture described in this invention, which are fitted with the cycloidal wheel.

[0028] The markings in the attached diagram are described below:

[0029] 1. Lower base; 11. Connecting column; 2. Base plate; 21. Side pin hole; 22. Connecting hole; 23. Center pin hole; 3. Lower pin; 31. Prism block; 32. Lower pin partition plate; 4. Upper pin; 41. Triangular block; 42. Upper pin partition plate; 5. Center pin; 51. Cylindrical block; 6. Rear cycloidal wheel; 7. Front cycloidal wheel; 8. Pressure cap; 9. Upper base. Detailed Implementation

[0030] The present invention will now be described in further detail with reference to the accompanying drawings. These drawings are simplified schematic diagrams, illustrating only the basic structure of the invention, and therefore only show the components relevant to the invention.

[0031] like Figure 1-9 An improved cycloidal wheel pair grinding fixture shown includes a lower base 1, a base plate 2, a lower pin 3, an upper pin 4, a center pin 5, a rear cycloidal wheel 6, a front cycloidal wheel 7, a pressure cap 8, and an upper base 9. A connecting post 11 is fixedly provided on the upper surface of the lower base 1.

[0032] The bottom of the chassis 2 is provided with a connecting hole 22, and the upper center of the chassis 2 is provided with a central pin hole 23. A ring of side pin holes 21 is provided around the central pin hole 23, and the number of side pin holes 21 is 6. The connecting post 11 extends into the connecting hole 22 to connect the lower base 1 and the chassis 2. In one possible embodiment, the connecting post 11 is provided with external threads, and the inner wall of the connecting hole 22 is provided with internal threads, and the connecting post 11 and the connecting hole 22 are threadedly connected.

[0033] like Figure 2 As shown in Figure 9, the rear cycloidal wheel 6 and the front cycloidal wheel 7 are both provided with a central hole at their center positions. The rear cycloidal wheel 6 and the front cycloidal wheel 7 are provided with a positioning round hole and a positioning triangular hole around the central hole, and the positioning round hole and the positioning triangular hole are arranged in a circle at intervals.

[0034] like Figure 1 and 9 As shown, the lower end of the lower pin 3 is inserted into the side pin hole 21 on the chassis 2, and the upper end of the lower pin 3 is provided with a prism block 31. The thickness of the prism block 31 is equal to or less than the thickness of a cycloidal wheel, so that the prism block 31 only extends into the positioning round hole of the rear cycloidal wheel 6, thereby achieving the effect of restricting the rotation of the rear cycloidal wheel 6.

[0035] The lower end of the upper pin 4 is inserted into the side pin hole 21 on the chassis 2. The upper end of the upper pin 4 is provided with a triangular block 41. The thickness of the triangular block 41 is equal to or greater than the thickness of the two cycloidal wheels, so that the triangular block 41 can extend into the positioning round hole of the rear cycloidal wheel 6 and the positioning triangular hole of the front cycloidal wheel 7, thereby achieving the effect of restricting the rotation of the rear cycloidal wheel 6 and the front cycloidal wheel 7.

[0036] The lower end of the center pin 5 is inserted into the center pin hole 23 on the chassis 2, and the upper end of the center pin 5 is provided with a cylindrical block 51. The cylindrical block 51 extends into the center holes of the rear cycloidal wheel 6 and the front cycloidal wheel 7 respectively, so as to realize the radial positioning of the cycloidal wheel.

[0037] The pressure cap 8 presses the rear cycloidal wheel 6 and the front cycloidal wheel 7 onto the chassis 2 from the top. The parts of the rear cycloidal wheel 6 and the front cycloidal wheel 7 that need to be ground extend out of the edge of the chassis 2. The top of the pressure cap 8 is provided with a groove, and the bottom of the upper base 9 is provided with a protruding ring. The protruding ring extends into the groove so that the upper base 9 and the pressure cap 8 are connected to each other.

[0038] A lower pin separator 32 is provided between the lower end of the prismatic block 31 and the lower pin 3, and the prismatic block 31, the lower pin 3, and the lower pin separator 32 are an integral structure.

[0039] An upper pin separator 42 is provided between the lower end of the triangular block 41 and the upper pin 4, and the triangular block 41, the upper pin 4, and the upper pin separator 42 are an integral structure.

[0040] like Figure 1 As shown, the lower pin separator plate 32 and the upper pin separator plate 42 are recessed into the side pin holes 21 to position the lower pin 3 and the upper pin 4.

[0041] The lower base 1 and the upper base 9 are respectively connected to the gear grinding equipment.

[0042] The number of lower pins 3 and upper pins 4 are both two. The upper pins 4 are set at symmetrical positions of the lower pins 3 and are arranged adjacent to each other to ensure that the two cycloidal wheels are subjected to balanced forces during processing.

[0043] This invention discloses an improved cycloidal gear pair grinding fixture, comprising a lower base, a chassis, a lower pin, an upper pin, a center pin, a rear cycloidal gear, a front cycloidal gear, a pressure cap, and an upper base. The fixture utilizes a non-circular pin structure to achieve paired machining of the front and rear cycloidal gears. Clamping is as simple as mounting the front and rear cycloidal gears onto the base, reducing clamping time. Furthermore, the reduced spacing between the cycloidal gears decreases the overall machining time, improving the overall machining efficiency of the cycloidal gears. Simultaneously, the elimination of the transition plate significantly reduces the weight of the fixture, especially for machining large-sized cycloidal gears, improving machine adjustment and clamping efficiency. Its reasonable structure offers advantages such as high fit and convenient clamping, effectively solving the problem of low overall production efficiency in existing cycloidal gear grinding fixtures.

[0044] Based on the above-described preferred embodiments of the present invention, and through the foregoing description, those skilled in the art can make various changes and modifications without departing from the inventive concept. The technical scope of this invention is not limited to the contents of the specification, but must be determined according to the scope of the claims.

Claims

1. An improved cycloidal gear pair grinding fixture, characterized in that: It includes a lower base (1), a chassis (2), a lower pin (3), an upper pin (4), a center pin (5), a rear cycloidal wheel (6), a front cycloidal wheel (7), a pressure cap (8), and an upper base (9). A connecting column (11) is fixedly provided on the upper surface of the lower base (1). The bottom of the chassis (2) is provided with a connecting hole (22), and the center of the upper end of the chassis (2) is provided with a central pin hole (23). A ring of side pin holes (21) is provided around the central pin hole (23). The connecting column (11) extends into the connecting hole (22) so that the lower base (1) and the chassis (2) are connected to each other. The rear cycloidal wheel (6) and the front cycloidal wheel (7) are both provided with a central hole at their center positions. The rear cycloidal wheel (6) and the front cycloidal wheel (7) are provided with a positioning round hole and a positioning triangular hole around the central hole. The positioning round hole and the positioning triangular hole are arranged in a circle at intervals. The lower end of the lower pin (3) is inserted into the side pin hole (21) on the chassis (2). The upper end of the lower pin (3) is provided with a prism block (31). The thickness of the prism block (31) is equal to or less than the thickness of a cycloidal wheel, so that the prism block (31) only extends into the positioning hole of the rear cycloidal wheel (6), thereby achieving the effect of restricting the rotation of the rear cycloidal wheel (6). The lower end of the upper pin (4) is inserted into the side pin hole (21) on the chassis (2). The upper end of the upper pin (4) is provided with a triangular block (41). The thickness of the triangular block (41) is equal to or greater than the thickness of the two cycloidal wheels, so that the triangular block (41) can be inserted into the positioning round hole of the rear cycloidal wheel (6) and the positioning triangular hole of the front cycloidal wheel (7), thereby achieving the effect of restricting the rotation of the rear cycloidal wheel (6) and the front cycloidal wheel (7). The lower end of the center pin (5) is inserted into the center pin hole (23) on the chassis (2), and the upper end of the center pin (5) is provided with a cylindrical block (51). The cylindrical block (51) extends into the center holes of the rear cycloidal wheel (6) and the front cycloidal wheel (7) respectively to achieve radial positioning of the cycloidal wheel. The pressure cap (8) presses the rear cycloidal wheel (6) and the front cycloidal wheel (7) together from the top. The top of the pressure cap (8) is provided with a groove, and the bottom of the upper base (9) is provided with a convex ring. The convex ring extends into the groove so that the upper base (9) and the pressure cap (8) are connected to each other.

2. The improved cycloidal gear pair grinding fixture according to claim 1, characterized in that: A lower pin separator plate (32) is provided between the lower end of the prism block (31) and the lower pin (3), and the prism block (31), the lower pin (3), and the lower pin separator plate (32) are an integral structure.

3. The improved cycloidal gear pair grinding fixture according to claim 1, characterized in that: An upper pin separator plate (42) is provided between the lower end of the triangular block (41) and the upper pin (4), and the triangular block (41), the upper pin (4), and the upper pin separator plate (42) are an integral structure.

4. The improved cycloidal gear pair grinding fixture according to claim 2, characterized in that: The lower pin separator plate (32) is sunk into the side pin hole (21) to position the lower pin (3).

5. An improved cycloidal gear pair grinding fixture according to claim 3, characterized in that: The upper pin separator plate (42) is sunk into the side pin hole (21) to position the upper pin (4).

6. The improved cycloidal gear pair grinding fixture according to claim 1, characterized in that: The lower base (1) and upper base (9) are respectively connected to the gear grinding equipment.

7. The improved cycloidal gear pair grinding fixture according to claim 1, characterized in that: The number of the lower pin (3) and the upper pin (4) are both two. The upper pin (4) is set at the symmetrical position of the lower pin (3), and the lower pin (3) and the upper pin (4) are set adjacent to each other to ensure that the two cycloidal wheels are balanced in force during processing.

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