A kind of cycloid gear machining clamp

Abstract

The utility model relates to the technical field of clamp, put forward a kind of clamp for cycloidal gear processing, including base;Base is connected on base, and the top surface of base is provided with positioning protrusion, and positioning protrusion has thread on it, and positioning protrusion is arranged in the center hole of cycloidal gear;Gland middle has through hole, and the top end of positioning protrusion passes through through hole, and gland is pressed on cycloidal gear;Mounting nut is sleeved on positioning protrusion, and the thread part of mounting nut and positioning protrusion is screw connection form, and mounting nut contacts gland;Clamping block is multiple and is slidably arranged on the top surface of base, and clamping block is inserted into the lightening hole of cycloidal gear;Driving part is arranged on base and is used to drive clamping block to move. Through the above technical scheme, the problem that the existing cycloidal gear exists in hobbing machining and is complicated to lead to installation and maintenance cumbersome is solved.

Description

Technical Field

[0001] This utility model relates to the field of fixture technology, specifically to a fixture for machining cycloidal gears. Background Technology

[0002] Cutting force is an important physical quantity in gear hobbing. Large hobbing forces can cause bending deformation of the hob and workpiece spindle, as well as changes in the spindle center distance, leading to machining deformation. Therefore, to reduce hobbing deformation and its impact, it is necessary to understand the hobbing force and its influence on machining deformation.

[0003] The cycloidal gear, due to its internal weight-reducing holes, undergoes deformation during hobbing, affecting the quality and precision of the machined teeth. Although existing fixtures can improve the rigidity of cycloidal gears, their complex structure makes installation and maintenance cumbersome.

[0004] Therefore, a new type of clamp is urgently needed. Utility Model Content

[0005] This utility model proposes a fixture for machining cycloidal gears, which solves the problem of complicated installation and maintenance caused by the complex fixture structure in the existing cycloidal gear hobbing process.

[0006] The technical solution of this utility model is as follows:

[0007] A fixture for machining cycloidal gears, comprising:

[0008] The base is used to connect the worktable of the gear hobbing machine;

[0009] A base is connected to the base plate. A positioning protrusion is provided at the center of the top surface of the base plate. The positioning protrusion has threads and passes through the center hole of the cycloidal gear.

[0010] A pressure cap has a through hole in the middle, and the top of the positioning protrusion passes through the through hole. The pressure cap presses on the cycloidal gear to fix the cycloidal gear.

[0011] A mounting nut is fitted onto the positioning protrusion, and the mounting nut and the threaded portion of the positioning protrusion are connected by a thread, with the mounting nut contacting the pressure cap.

[0012] Multiple clamping blocks are slidably disposed on the top surface of the base. The multiple clamping blocks are evenly distributed in a circle with the center of the top surface of the base as the center. The clamping blocks are inserted into the weight reduction hole of the cycloidal gear.

[0013] A driving element is disposed on the base and is used to drive the clamping block to move.

[0014] With the above technical solution, the base is connected to the worktable of the gear hobbing machine, and the base is connected to the base. The cycloidal gear is fixed by the positioning protrusion on the base and the clamping block slidably set on the base. Since the clamping block passes through the weight reduction hole of the cycloidal gear and there is contact between the clamping block and the cycloidal gear, the rigidity of the cycloidal gear can be improved. During the contact processing of the cycloidal gear and the gear hobbing machine, the cycloidal gear has sufficient rigidity, which reduces the deformation generated during the gear hobbing process, thereby improving the uniformity of the external tooth quality.

[0015] As a further technical solution, a limiting ring is also included, which is fixed on the top surface of the base. The limiting ring and the pressure cap are located on both sides of the cycloidal gear, and the limiting ring is located outside the clamping block.

[0016] With the above technical solution, a limiting ring is set on the base to facilitate adjustment. The limiting ring covers the top surface of the base, and the clamping block is located inside the limiting ring. The clamping block will contact the limiting ring during the sliding process, thereby preventing the clamping block from sliding off the top surface of the base.

[0017] As a further technical solution, the driving component includes a slider and a driving bolt. The slider is slidably disposed on the top surface of the base, and the top surface of the slider is connected to the clamping block. A first threaded groove is formed on the bottom surface of the slider. A second threaded groove is formed on the top surface of the base. The driving bolt passes through both the first threaded groove and the second threaded groove. The driving bolt is threadedly connected to the slider via the first threaded groove and to the base via the second threaded groove.

[0018] Through the above technical solution, the drive bolt, the slider and the base are connected by a threaded drive through the cooperation of the drive bolt, the first threaded groove and the second threaded groove. Since the base is fixed, the slider can be moved by rotating the drive bolt.

[0019] As a further technical solution, a groove is provided on the top surface of the base, and the slider is slidably disposed in the groove.

[0020] In order to improve the stability of the slider during movement, a groove is opened on the top surface of the base through the above technical solution. The slider slides in the groove, and the stability of the slider in the direction of movement can be achieved by the design direction of the groove.

[0021] As a further technical solution, a guide protrusion is provided on the inner wall of the slide groove, and a guide groove is provided on the side of the slider, with the guide protrusion passing through the guide groove.

[0022] To prevent the slider from easily sliding out of the groove, a guide protrusion is provided on the inner wall of the groove and a guide groove is opened on the side of the slider. The length direction of the guide protrusion is along the moving direction of the slider. When the slider is placed in the groove, the guide protrusion passes through the guide groove.

[0023] As a further technical solution, the driving component and the clamping block are configured in a one-to-one correspondence.

[0024] Through the above technical solution, in order to facilitate operation and reduce the complexity of the overall structure, the driving component and the clamping block are set in a one-to-one correspondence.

[0025] As a further technical solution, the number of clamping blocks is consistent with the number of weight-reducing holes of the cycloidal gear and they are set in a one-to-one correspondence.

[0026] Through the above technical solution, in order to reduce the overall complexity of the structure and make the overall structure more compact, coordinated and reasonable, the number of clamping blocks and the number of weight reduction holes of the cycloidal gear are set to be the same.

[0027] As a further technical solution, the clamping block is fixed to the slider in a detachable manner.

[0028] The above technical solution uses a detachable fixing method, which facilitates maintenance and disassembly.

[0029] As a further technical solution, a spherical washer is also included, which is sleeved on the positioning protrusion and located between the cycloidal gear and the mounting nut.

[0030] In order to improve the stability of the cycloidal gear during fixing, a spherical washer is fitted on the positioning protrusion through the above technical solution. The spherical washer is located between the cycloidal gear and the mounting nut. Through the elastic deformation of the spherical washer, the locking performance of the mounting nut can be improved, and the mounting nut can be prevented from loosening.

[0031] As a further technical solution, the cover plate has a receiving groove on the side facing the cycloidal gear, and the top end of the clamping block passes through the receiving groove.

[0032] In order to further improve the rigidity of the cycloidal gear through the above technical solution, it is necessary to maximize the contact surface between the clamping block and the cycloidal gear. Therefore, the height of the clamping block needs to be higher than that of the cycloidal gear. At this time, since the pressure cap presses on the cycloidal gear, a receiving groove is provided on the surface of the pressure cap facing the cycloidal gear, and the top surface of the clamping block penetrates into the receiving groove of the pressure cap.

[0033] The advantages of the clamp for machining cycloidal gears provided by this utility model include at least the following:

[0034] 1. By inserting the clamping block into the weight-reducing hole of the cycloidal gear blank, the overall rigidity of the cycloidal gear blank is enhanced, effectively reducing deformation during the hobbing process, thereby improving the machining quality and precision of the gear.

[0035] Second, the structure of positioning protrusions combined with pressure caps and mounting nuts enables rapid positioning and reliable clamping of cycloidal gear blanks. The structure is simple and compact, improving clamping efficiency.

[0036] Third, the limit ring and slide guide structure are set to effectively limit the movement range of the clamping block and the slider, prevent them from sliding out of the base during processing, ensure the clamping process is stable and reliable, and improve safety.

[0037] Fourth, the clamping block and the slider are detachably connected, which makes it easy to replace the corresponding clamping block according to different gear specifications. The use of spherical washers further improves the anti-loosening performance and improves the stability and safety of the fixture during use. Attached Figure Description

[0038] The present invention will now be described in further detail with reference to the accompanying drawings and specific embodiments.

[0039] Figure 1 An isometric view of the fixture for machining cycloidal gears provided by this utility model;

[0040] Figure 2 for Figure 1 Front view;

[0041] Figure 3 for Figure 1 Top view;

[0042] Figure 4 for Figure 1 Exploded view;

[0043] Figure 5 for Figure 1 The diagram shows the structure after the nuts, spherical washers, and glands are installed.

[0044] Figure 6 This is a schematic diagram of the structure of the pressure cap in this utility model;

[0045] Figure 7 This is a schematic diagram of the base structure in this utility model;

[0046] Figure 8 This is a schematic diagram of the slider in this utility model.

[0047] In the diagram: 1. Base; 2. Base plate; 3. Positioning protrusion; 4. Pressure cap; 5. Mounting nut; 6. Clamping block; 7. Limiting ring; 8. Slider; 9. Drive bolt; 10. Slide groove; 11. Spherical washer; 12. Receiving groove; 13. Cycloidal gear blank. Detailed Implementation

[0048] The technical solutions of this utility model will be clearly and completely described below with reference to the embodiments of this utility model. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of this utility model.

[0049] Please refer to Figures 1 to 8 This application is described below.

[0050] This application provides a fixture for machining cycloidal gears. The fixture includes a base 1, a base 2, a pressure cap 4, a mounting nut 5, a clamping block 6, and a driving component. The base 1 is used to connect to the worktable of a gear hobbing machine. The base 2 is detachably fixed to the base 1. A positioning protrusion 3 is provided at the center of the top surface of the base 2. The positioning protrusion 3 passes through the center hole of the cycloidal gear blank 13 and is used to restrict the movement of the cycloidal gear blank 13 on the top surface of the base 2.

[0051] refer to Figure 6 The pressure cap 4 has a through hole in the center. The top of the positioning protrusion 3 passes through the through hole of the pressure cap 4. The pressure cap 4 presses on the cycloidal gear blank 13. The pressure cap 4 and the base 2 are located on both sides of the cycloidal gear blank 13. The pressure cap 4 and the base 2 clamp the cycloidal gear blank 13 together.

[0052] refer to Figure 1 and Figure 4 The mounting nut 5 is fitted onto the top of the positioning protrusion 3, and the mounting nut 5 and the top of the positioning protrusion 3 are connected by a thread. The mounting nut 5 presses on the pressure cover 4, which in turn presses the pressure cover 4 onto the cycloidal gear blank 13, thus fixing the cycloidal gear blank 13.

[0053] To further improve the stability between the mounting nut 5 and the gland 4, and to allow the mounting nut 5 to be loosened, a spherical washer 11 is provided between the mounting nut 5 and the gland 4. The spherical surface of the spherical washer 11 presses against the center hole of the cycloidal gear blank 13.

[0054] refer to Figure 5 The clamping blocks 6 are slidably disposed on the top surface of the base 2. There are two clamping blocks 6, which move away from or close to each other during the movement. The clamping blocks 6 are inserted into the weight reduction hole of the cycloidal gear blank 13 and contact the inner wall of the weight reduction hole. This can increase the rigidity of the cycloidal gear blank 13 and prevent deformation of the cycloidal gear blank 13 during gear hobbing, which would affect the quality of the cycloidal gear teeth.

[0055] To prevent the clamping block 6 from falling off the top surface of the base 2, a limiting ring 7 is provided on the top surface of the base 2. The limiting ring 7 is made of elastic material. The limiting ring 7 contacts the bottom surface of the cycloidal gear blank 13, and the top cover contacts the top surface of the cycloidal gear blank 13. In this way, the cycloidal gear blank 13 can be clamped, and because the clamping block 6 moves within the limiting ring 7, it is prevented from falling off the top surface of the base 2.

[0056] refer to Figure 1 and Figure 4 The driving component includes a slider 8 and a driving bolt 9, which are located between the top surfaces of the clamping block 6 and the base 2. The slider 8 slides on the top surface of the base 2, and the clamping block 6 is detachably fixed to the slider 8. A first threaded groove is formed on the bottom surface of the slider 8, and a second threaded groove is formed on the top surface of the base 2 corresponding to the position of the slider 8. The first threaded groove corresponds to the second threaded groove, and the driving bolt 9 passes through both the first and second threaded grooves. When the driving bolt 9 is rotated, since the driving bolt 9 is threadedly connected to both the slider 8 and the base 2, and the base 2 does not move, the slider 8 will move in the direction of the axis of the driving bolt 9. By setting the driving bolt 9 and the slider 8, the overall structure can be simplified, making the structure more compact and reducing production costs.

[0057] To improve the stability of the slider 8 during its movement on the base 2, a groove 10 is provided on the base 2, and a guide protrusion is provided on the side wall of the groove 10. The slider 8 is located in the groove 10, and a guide groove is provided on the side of the slider 8. The guide protrusion passes into the guide groove. Since the slider 8 moves within the groove 10, the stability of the slider 8 can be improved, thereby improving the stability of the clamping block 6 during its movement.

[0058] refer to Figure 5 and Figure 6 Furthermore, since the clamping block 6 can improve the rigidity of the cycloidal gear blank 13, in order to make the cycloidal gear blank 13 have better rigidity, the contact area between the clamping block 6 and the cycloidal gear needs to be larger. Since the clamping block 6 is inserted into the weight reduction hole of the cycloidal gear, the top of the clamping block 6 can be higher than the thickness of the cycloidal gear blank 13. Since the pressure cap 4 needs to contact the cycloidal gear blank 13, a receiving groove 12 is provided on the pressure cap 4, with the receiving groove 12 facing the cycloidal gear blank 13, so that the top of the clamping block 6 can be inserted into the receiving groove 12.

[0059] The above are merely preferred embodiments of the present utility model and are not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model shall be included within the protection scope of the present utility model.

Claims

1. A fixture for machining cycloidal gears, characterized in that, include: Base (1), used to connect the worktable of the gear hobbing machine; The base (2) is connected to the base (1). A positioning protrusion (3) is provided at the center of the top surface of the base (2). The positioning protrusion (3) has a thread and is inserted into the center hole of the cycloidal gear blank (13). The pressure cap (4) has a through hole in the middle, and the top of the positioning protrusion (3) passes through the through hole. The pressure cap (4) presses on the cycloidal gear to fix the cycloidal gear. The mounting nut (5) is fitted onto the positioning protrusion (3). The mounting nut (5) and the threaded part of the positioning protrusion (3) are connected by a thread. The mounting nut (5) contacts the pressure cap (4). Clamping blocks (6) are multiple and are slidably disposed on the top surface of the base (2). The multiple clamping blocks (6) are evenly distributed in a circle with the center of the top surface of the base (2) as the center. The clamping blocks (6) are inserted into the weight reduction hole of the cycloidal gear. A drive unit is disposed on the base (2) and is used to drive the clamping block (6) to move.

2. The jig for machining cycloidal gears according to claim 1, characterized in that, It also includes a limiting ring (7), which is fixed on the top surface of the base (2). The limiting ring (7) and the pressure cap (4) are located on both sides of the cycloidal gear, and the limiting ring (7) is located outside the clamping block (6).

3. A jig for machining cycloidal gears according to claim 2, characterized in that, The driving component includes a slider (8) and a driving bolt (9). The slider (8) is slidably disposed on the top surface of the base (2). The top surface of the slider (8) is connected to the clamping block (6). A first threaded groove is provided on the bottom surface of the slider (8). A second threaded groove is provided on the top surface of the base (2). The driving bolt (9) passes through both the first threaded groove and the second threaded groove. The driving bolt (9) is threadedly connected to the slider (8) via the first threaded groove and to the base (2) via the second threaded groove.

4. A jig for machining cycloidal gears according to claim 3, characterized in that, A groove (10) is provided on the top surface of the base (2), and the slider (8) is slidably disposed in the groove (10).

5. A jig for machining cycloidal gears according to claim 4, characterized in that, The inner wall of the slide groove (10) is provided with a guide protrusion, and the side of the slider (8) is provided with a guide groove, and the guide protrusion passes through the guide groove.

6. A jig for machining cycloidal gears according to claim 3, characterized in that, The driving component is configured in a one-to-one correspondence with the clamping block (6).

7. A jig for machining cycloidal gears according to claim 6, characterized in that, The number of clamping blocks (6) is the same as the number of weight reduction holes of the cycloidal gear and they are set in a one-to-one correspondence.

8. A jig for machining cycloidal gears according to claim 3, characterized in that, The clamping block (6) is detachably fixed to the slider (8).

9. A jig for machining cycloidal gears according to any one of claims 1-8, characterized in that, It also includes a spherical washer (11), which is fitted on the positioning protrusion (3) and located between the cycloidal gear and the mounting nut (5).

10. A jig for machining cycloidal gears according to any one of claims 1-8, characterized in that, The pressure cap (4) has a receiving groove (12) on the side facing the cycloidal gear, and the top end of the clamping block (6) passes through the receiving groove (12).

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