Anti-deformation supporting tool for gear

Abstract

A gear anti-deformation supporting tool relates to the technical field of gear machining and comprises a supporting rod, a first supporting block and a second supporting block. The first supporting block and the second supporting block are installed at the two ends of the supporting rod respectively. The side face, away from the second supporting block, of the first supporting block is arranged to be an outwards-protruding first arc-shaped face. The side face, away from the first supporting block, of the second supporting block is arranged to be a concave second arc-shaped face. The first arc-shaped face is used for making contact with the outer side groove wall of the annular groove, and the second arc-shaped face is used for making contact with the inner side groove wall of the annular groove. According to the design of the tool, collapse and taper deformation of the gear under the action of thermal stress can be reduced, and therefore the requirement for the stable and uniform machining amount after heat treatment is met.

Description

Technical Field

[0001] This utility model relates to the field of gear processing technology, and more specifically, to a gear anti-deformation support fixture. Background Technology

[0002] Gears, especially those with annular grooves on their surfaces, experience significant surface deformation during carburizing and quenching under thermal and structural stress. Typically, during furnace loading, cover plates are added to the end faces of the parts to reduce the quenching intensity at the web area, thereby minimizing deformation caused by structural stress. However, this method has limited effect on reducing deformation caused by quenching and does not improve deformation caused by thermal stress. After carburizing and quenching, the parts are prone to severe taper collapse, failing to meet the requirements for subsequent machining of the tooth surfaces.

[0003] The inventors discovered in their research that existing gear anti-deformation methods have at least the following drawbacks:

[0004] Traditional methods for protecting irregularly shaped, deeply recessed thin gears from deformation during heat treatment involve adding cover plates to the upper and lower surfaces of the part. However, in carburizing and quenching, adding cover plates can only partially reduce the deformation caused by structural stress, and cannot reduce the taper collapse deformation caused by thermal stress. In the carburizing and quenching deformation of this type of irregularly shaped, deeply recessed thin gear, the taper collapse deformation caused by thermal stress has a greater impact, but this solution has no effect on improving this type of deformation. Utility Model Content

[0005] The purpose of this utility model includes, for example, providing a gear anti-deformation support fixture, which can reduce the collapse and taper deformation of gears under thermal stress, thereby meeting the requirement of stable and uniform machining volume after heat treatment.

[0006] The embodiments of this utility model can be implemented as follows:

[0007] In a first aspect, this utility model provides a gear anti-deformation support fixture for assembly into an annular groove of a gear body. The annular groove is arranged around the axis of the gear body and includes a support rod, a first support block, and a second support block; wherein:

[0008] The first support block and the second support block are respectively installed at both ends of the support rod; the side of the first support block away from the second support block is configured as a convex first arc-shaped surface; the side of the second support block away from the first support block is configured as a concave second arc-shaped surface.

[0009] The first arc-shaped surface is used to contact the outer wall of the annular groove, and the second arc-shaped surface is used to contact the inner wall of the annular groove.

[0010] In an optional embodiment, the first support block is provided with a first assembly hole, and the end of the support rod is inserted and fixed in the first assembly hole.

[0011] In an optional embodiment, the second support block is provided with a second mounting hole, and the end of the support rod is inserted and fixed in the second mounting hole.

[0012] In an optional implementation, the support rod is configured as a telescopic structure.

[0013] In an optional embodiment, the support rod includes a first rod body, a second rod body, and an adjusting sleeve, wherein the first rod body and the second rod body are respectively inserted into the two ends of the adjusting sleeve, and the first rod body is screwed into the adjusting sleeve;

[0014] The first rod is connected to the first support block, and the first support block is provided with a first limiting surface for engaging with the bottom wall of the annular groove, so as to restrict the rotation of the first support block relative to the gear body when the first limiting surface contacts the bottom wall of the groove; the second rod is connected to the second support block.

[0015] In an optional embodiment, the second rod is screwed into the adjusting sleeve, and the threads of the first rod and the second rod have opposite directions;

[0016] The second support block is provided with a second limiting surface for engaging with the bottom wall of the annular groove, so as to restrict the rotation of the second support block relative to the gear body when the second limiting surface contacts the bottom wall of the groove.

[0017] In an optional embodiment, the outer peripheral surface of the adjusting sleeve is provided with an anti-slip structure.

[0018] In an optional embodiment, the outer contour of the cross-section of the anti-slip structure is set to be non-circular, and the cross-section is a plane perpendicular to the axis of the adjusting sleeve.

[0019] In an optional embodiment, the cross-sectional outer contour of the anti-slip structure is set to a regular hexagon.

[0020] In an optional implementation, both the first support block and the second support block are configured as sector-shaped blocks.

[0021] The beneficial effects of this utility model embodiment include, for example:

[0022] In summary, the gear anti-deformation support fixture provided in this embodiment can be used in combination with multiple fixtures before heat treatment of the gear body to reduce deformation during heat treatment. Specifically, the gear body has an annular groove machined on its surface, and three gear anti-deformation support fixtures can be placed within this groove. The angle between adjacent gear anti-deformation support fixtures in the circumferential direction is 120°, meaning the three fixtures are evenly distributed, resulting in good support and anti-deformation effects. In practical use, the first arc-shaped surface of the first support block of each gear anti-deformation support fixture contacts the outer wall of the annular groove, and the second arc-shaped surface of the second support block contacts the inner wall of the annular groove. The distance between the first and second support blocks is determined by the support rod, ensuring that the first and second support blocks remain in contact with the gear body at all times. During heat treatment, this suppresses shrinkage of the constriction opening, thereby inhibiting tapered deformation and collapse of the gear body, reducing carburizing and quenching deformation, and improving the processing quality of the gear body. Attached Figure Description

[0023] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this utility model and should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0024] Figure 1 This is a schematic diagram of a gear anti-deformation support fixture according to an embodiment of this application;

[0025] Figure 2 This is an exploded view of the gear anti-deformation support tooling according to an embodiment of this application;

[0026] Figure 3 This is a first-view application diagram of the gear anti-deformation support tooling according to an embodiment of this application.

[0027] Figure 4 This is a second-view application diagram of the gear anti-deformation support tooling according to an embodiment of this application.

[0028] icon:

[0029] 001-Gear body; 011-Annular groove; 012-Outer groove wall; 013-Inner groove wall; 100-Support rod; 110-First rod body; 120-Second rod body; 130-Adjusting sleeve; 131-Anti-slip structure; 200-First support block; 201-First mounting hole; 210-First arc-shaped surface; 220-First limiting surface; 300-Second support block; 301-Second mounting hole; 310-Second arc-shaped surface; 320-Second limiting surface. Detailed Implementation

[0030] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. The components of the embodiments of this utility model described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0031] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.

[0032] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0033] In the description of this utility model, it should be noted that if terms such as "upper," "lower," "inner," or "outer" are used to indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship in which the product is usually placed during use, they are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0034] Furthermore, the terms "first" and "second" are used only to distinguish descriptions and should not be interpreted as indicating or implying relative importance.

[0035] It should be noted that, where there is no conflict, the features in the embodiments of this utility model can be combined with each other.

[0036] In the prior art, for gear bodies 001 with pits or annular grooves 011 on their surfaces, in order to prevent or reduce deformation during heat treatment, two cover plates are generally used to clamp the gear body 001. This method can only partially reduce the deformation caused by structural stress, but cannot reduce the tapered collapse deformation caused by thermal stress.

[0037] In view of this, the designer provides a gear anti-deformation support fixture, which can effectively reduce the deformation of the gear body 001 at the position of the annular groove 011 during heat treatment and improve the machining quality of the gear body 001.

[0038] Please refer to Figure 1 and Figure 2 This embodiment provides a gear anti-deformation support fixture, including a support rod 100, a first support block 200, and a second support block 300. The first support block 200 and the second support block 300 are respectively installed at both ends of the support rod 100. The side of the first support block 200 away from the second support block 300 is configured as a convex first arc-shaped surface 210; the side of the second support block 300 away from the first support block 200 is configured as a concave second arc-shaped surface 310. The first arc-shaped surface 210 is used to contact the outer groove wall 012 of the annular groove 011, and the second arc-shaped surface 310 is used to contact the inner groove wall 013 of the annular groove 011.

[0039] As described above, the gear anti-deformation support fixture in this embodiment is used as follows:

[0040] Please combine Figure 3 Three gear anti-deformation support fixtures can be placed in the annular groove 011. The angle between adjacent gear anti-deformation support fixtures in the circumferential direction is 120°. That is, the three gear anti-deformation support fixtures are evenly spaced around the axis of the annular groove 011, or the circumference of the gear body 001, resulting in good support and anti-deformation effects. In use, the first arc-shaped surface 210 of the first support block 200 of each gear anti-deformation support fixture contacts the outer groove wall 012 of the annular groove 011, and the second arc-shaped surface 310 of the second support block 300 contacts the inner groove wall 013 of the annular groove 011. The distance between the first support block 200 and the second support block 300 is determined by the support rod 100, ensuring that the first support block 200 and the second support block 300 are always in contact with the gear body 001. During heat treatment, this suppresses shrinkage of the constriction opening, thereby inhibiting the taper deformation and collapse of the gear body 001, and further reducing the carburizing and quenching deformation of the gear body 001, thus improving the processing quality of the gear body 001.

[0041] Please combine Figure 4 It is worth noting that the gear body 001 has two surfaces in its thickness direction, and annular grooves 011 are provided on both surfaces. During heat treatment, multiple gear bodies 001 can be stacked and arranged, with the grooves of the annular grooves 011 of adjacent gear bodies 001 mating together. This gear anti-deformation support fixture has a certain thickness, that is, the first support block 200 and the second support block 300 have a certain thickness, and the thickness can be set to be equal to the sum of the groove depths of the two annular grooves 011. In this way, one gear anti-deformation support fixture can simultaneously support two stacked gear bodies 001, improving resource utilization and saving costs.

[0042] The following embodiments illustrate the details of the gear anti-deformation support tooling of this application by way of example.

[0043] Please combine Figures 1-2 In this embodiment, optionally, the gear anti-deformation support fixture includes a support rod 100, a first support block 200, and a second support block 300. The first support block 200 and the second support block 300 are installed at both ends of the support rod 100. The support rod 100 is used to adjust the distance between the first support block 200 and the second support block 300, thereby adapting to the support positioning of annular grooves 011 of different sizes.

[0044] Please combine Figures 1-2 Optionally, the support rod 100 can be configured as a telescopic structure. For example, the support rod 100 includes a first rod body 110, a second rod body 120, and an adjusting sleeve 130. Both ends of the adjusting sleeve 130 are open, and the inner wall surface of the adjusting sleeve 130 is provided with two internal threads with opposite directions of rotation. The first rod body 110 is provided with a first external thread, and the second rod body 120 is provided with a second external thread. The first rod body 110 and the second rod body 120 are respectively inserted into the two ends of the adjusting sleeve 130. The first external thread of the first rod body 110 is screwed into the adjusting sleeve 130, and the second external thread of the second rod body 120 is threaded into the adjusting sleeve 130. Furthermore, the first and second external threads have opposite directions of rotation. In this way, by rotating the adjusting sleeve 130, without rotating the first rod 110 and the second rod 120, the first rod 110 and the second rod 120 move towards each other, that is, the first rod 110 and the second rod 120 move closer to each other or move further apart. By rotating the adjusting sleeve 130, the overall length of the support rod 100 can be changed to adapt to the usage requirements of different scenarios.

[0045] It should be understood that, in order to facilitate the rotation of the adjusting sleeve 130, an anti-slip structure 131 can be provided on the outer circumferential surface of the adjusting sleeve 130. The outer contour of the cross-section of the anti-slip structure 131 is non-circular, and the cross-section is a plane perpendicular to the axis of the adjusting sleeve 130. Specifically, the outer contour of the cross-section of the anti-slip structure 131 can be set as a regular hexagon, which facilitates the engagement of tools such as wrenches with the anti-slip structure 131, making rotation more time-saving and labor-saving.

[0046] Obviously, in some embodiments, the anti-slip structure 131 can also be set as a groove, and by inserting a tool into the groove and applying force to the tool, it is also convenient to rotate the adjusting sleeve 130.

[0047] In this embodiment, optionally, both the first support block 200 and the second support block 300 can be set as fan-shaped blocks, and their structures can be set to be the same, which is conducive to processing and reduces processing and manufacturing costs.

[0048] Please combine Figures 1-2 Optionally, the first support block 200 is provided with a first mounting hole 201, which is a through hole penetrating the inner and outer surfaces of the first support block 200. Both the inner and outer surfaces of the first support block 200 are arc-shaped surfaces. In use, if the first support block 200 is located outside the second support block 300, the outer surface of the first support block 200 can be referred to as the convex first arc-shaped surface 210, which can contact the outer groove wall 012 of the annular groove 011. The end of the first rod 110 can be inserted into the first mounting hole 201 from the inner surface. The first rod 110 and the first support block 200 can be configured as an interference fit, resulting in a stable and reliable structure.

[0049] Furthermore, the first support block 200 is a fan-shaped block with two first limiting surfaces 220 in its thickness direction. Both first limiting surfaces 220 are fan-shaped planes that can contact the bottom wall of the annular groove 011 of the two stacked gear bodies 001, preventing the first support block 200 from rotating relative to the gear body 001. Thus, when force is applied to the adjusting sleeve 130 to rotate it, the first rod 110 and the first support block 200 will not rotate with the adjusting sleeve 130, but will move in a straight line, causing the first arc-shaped surface 210 to contact the outer groove wall 012 of the annular groove 011, or to move away from the outer groove wall 012 of the annular groove 011. After the heat treatment is completed, the first arc-shaped surface 210 moves away from the outer groove wall 012 of the annular groove 011, which facilitates the separation of the tooling from the gear body 001.

[0050] Similarly, the second support block 300 is provided with a second mounting hole 301, which is a through hole penetrating the inner and outer surfaces of the second support block 300. Both the inner and outer surfaces of the second support block 300 are arc-shaped surfaces. In use, if the second support block 300 is located inside the second support block 300, the inner surface of the second support block 300 can be referred to as a recessed second arc-shaped surface 310, which can contact the inner groove wall 013 of the annular groove 011. The end of the second rod 120 can be inserted into the second mounting hole 301 from the outer surface. The second rod 120 and the second support block 300 can be configured as an interference fit, resulting in a stable and reliable structure.

[0051] Furthermore, the second support block 300 is a fan-shaped block with two second limiting surfaces 320 in its thickness direction. Both second limiting surfaces 320 are fan-shaped planes that can contact the bottom wall of the annular groove 011 of the two stacked gear bodies 001, preventing the second support block 300 from rotating relative to the gear body 001. Thus, when force is applied to the adjusting sleeve 130 to rotate it, the second rod 120 and the second support block 300 will not rotate with the adjusting sleeve 130, but will move linearly, causing the second arc-shaped surface 310 to contact the inner groove wall 013 of the annular groove 011, or to move away from the inner groove wall 013 of the annular groove 011. After heat treatment, the second arc-shaped surface 310 moves away from the outer groove wall 012 of the annular groove 011, facilitating the separation of the tooling from the gear body 001. Furthermore, since the first rod 110 and the second rod 120 move synchronously, the first support block 200 and the second support block 300 move synchronously, making operation convenient and quick.

[0052] The gear anti-deformation support fixture provided in this embodiment can effectively control the shape of parts during heat treatment, effectively reduce the taper and collapse deformation of irregularly shaped deep-pitted thin gears during heat treatment, and reduce the amount of machining after heat treatment; the fixture is lightweight, low-cost, easy to install and disassemble, highly flexible, and convenient to use; at the same time, by adjusting the length of the support rod 100, it can be used in pairs for parts of various sizes, and has strong versatility.

[0053] The above description is merely a specific embodiment of this utility model, but the protection scope of this utility model is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this utility model should be included within the protection scope of this utility model. Therefore, the protection scope of this utility model should be determined by the protection scope of the claims.

Claims

1. A gear anti-deformation support fixture, used for assembly into an annular groove (011) of a gear body (001), said annular groove (011) being arranged around the axis of the gear body (001), characterized in that, Includes a support rod (100), a first support block (200), and a second support block (300); wherein: The first support block (200) and the second support block (300) are respectively installed at both ends of the support rod (100); the side of the first support block (200) away from the second support block (300) is configured as an outwardly convex first arc-shaped surface (210); the side of the second support block (300) away from the first support block (200) is configured as an inwardly concave second arc-shaped surface (310); The first arc-shaped surface (210) is used to contact the outer groove wall (012) of the annular groove (011), and the second arc-shaped surface (310) is used to contact the inner groove wall (013) of the annular groove (011).

2. The gear anti-deformation support fixture according to claim 1, characterized in that: The first support block (200) is provided with a first assembly hole (201), and the end of the support rod (100) is inserted and fixed in the first assembly hole (201).

3. The gear anti-deformation support fixture according to claim 1, characterized in that: The second support block (300) is provided with a second assembly hole (301), and the end of the support rod (100) is inserted and fixed in the second assembly hole (301).

4. The gear anti-deformation support fixture according to any one of claims 1-3, characterized in that: The support rod (100) is configured as a telescopic structure.

5. The gear anti-deformation support fixture according to claim 4, characterized in that: The support rod (100) includes a first rod body (110), a second rod body (120), and an adjusting sleeve (130). The first rod body (110) and the second rod body (120) are respectively inserted into the two ends of the adjusting sleeve (130), and the first rod body (110) and the adjusting sleeve (130) are screwed together. The first rod (110) is connected to the first support block (200), and the first support block (200) is provided with a first limiting surface (220) for engaging with the bottom wall of the annular groove (011) to restrict the first support block (200) from rotating relative to the gear body (001) when the first limiting surface (220) contacts the bottom wall of the groove; the second rod (120) is connected to the second support block (300).

6. The gear anti-deformation support fixture according to claim 5, characterized in that: The second rod (120) is screwed into the adjusting sleeve (130), and the threads of the first rod (110) and the second rod (120) are in opposite directions; The second support block (300) is provided with a second limiting surface (320) for engaging with the bottom wall of the annular groove (011) to restrict the rotation of the second support block (300) relative to the gear body (001) when the second limiting surface (320) contacts the bottom wall of the groove.

7. The gear anti-deformation support fixture according to claim 5, characterized in that: The outer circumferential surface of the adjusting sleeve (130) is provided with an anti-slip structure (131).

8. The gear anti-deformation support fixture according to claim 7, characterized in that: The cross-sectional outer contour of the anti-slip structure (131) is set to be non-circular, and the cross-section is a plane perpendicular to the axis of the adjusting sleeve (130).

9. The gear anti-deformation support fixture according to claim 8, characterized in that: The cross-sectional outer contour of the anti-slip structure (131) is set as a regular hexagon.

10. The gear anti-deformation support fixture according to claim 1, characterized in that: Both the first support block (200) and the second support block (300) are configured as sector blocks.

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