Flexible gear structure of harmonic reducer

Abstract

The utility model relates to the technical field of flexible gear structures, and discloses a harmonic reducer flexible gear structure which comprises a cylinder body, a gear ring is installed in an inner cavity of the cylinder body, the gear ring is in an annular design, first racks are evenly distributed on the surface of the gear ring, and a groove is formed in the surface of the gear ring. The steel wheel is arranged in an inner cavity of the gear ring, and second racks are evenly distributed on the surface of the steel wheel; the heat dissipation groove is formed in the surface of the gear ring, and the heat dissipation groove is designed to be in an S shape. The space between the gear ring and the cylinder can be enlarged through the grooves, so that air can be blown to the surface of the gear ring through the grooves, heat dissipation treatment can be conducted on the surface of the gear ring, inflow air can enter the heat dissipation grooves through the heat dissipation holes, cooling treatment can be conducted on the whole gear ring through the heat dissipation grooves, heat dissipation can be conducted on inner teeth of the gear ring, and the service life of the gear ring is prolonged. Thermal deformation of the flexible gear caused by overheating is prevented, and the accurate geometric dimension of the flexible gear and normal work of the speed reducer are not affected.

Description

Technical Field

[0001] The utility model relates to the technical field of flexspline structures, and specifically relates to a flexspline structure of a harmonic reducer. Background Technique

[0002] The flexspline is a core component in a harmonic reducer. It cooperates with the wave generator through elastic deformation to achieve power transmission and speed reduction. The design of the flexspline is crucial for the performance of the harmonic reducer, directly affecting the load-bearing capacity, transmission accuracy, and service life of the reducer.

[0003] The bottom of a common flexspline structure is usually connected to the output shaft to transmit motion and torque. The cylinder body provides the support structure for the flexspline. The cylinder body has a geometric shape of a thin-walled cup. The tooth ring interacts with the wave generator to generate elastic deformation.

[0004] During the operation of the flexspline of the harmonic reducer, it will interact with the internal gear rigid wheel through elastic deformation. However, due to the interaction between the flexspline and the internal gear rigid wheel, friction will inevitably occur. Friction will increase the temperature of the flexspline surface, and excessive heat accumulation may cause thermal deformation of the flexspline, affecting its precise geometric dimensions and the normal operation of the reducer. Content of the Utility Model

[0005] (1) Technical Problems to be Solved

[0006] In view of the deficiencies of the prior art, the utility model provides a flexspline structure of a harmonic reducer to solve the problem that excessive heat accumulation may cause thermal deformation of the flexspline, affecting its precise geometric dimensions and the normal operation of the reducer as mentioned in the above background technique.

[0007] (2) Technical Solutions

[0008] To achieve the above object, the utility model provides the following technical solution: A flexspline structure of a harmonic reducer, comprising:

[0009] A cylinder body, in the inner cavity of which a tooth ring is installed. The tooth ring is of an annular design, and first racks are evenly distributed on the surface of the tooth ring. Grooves are formed on the surface of the tooth ring.

[0010] A steel wheel, arranged in the inner cavity of the tooth ring, and second racks are evenly distributed on the surface of the steel wheel.

[0011] Heat dissipation grooves, arranged on the surface of the tooth ring. The heat dissipation grooves are of an S-shaped design, and heat dissipation holes are evenly formed on the surface of the tooth ring. The heat dissipation holes are all communicated with the inner cavity of the heat dissipation grooves.

[0012] Preferably, positioning holes are evenly formed on the surface of the tooth ring, and positioning rods are screwed into the inner cavities of the positioning holes. The positioning rods can be fixedly connected to the installation surface of the mechanical system.

[0013] Preferably, the steel wheel is also designed in a ring shape. A bearing is installed in the inner cavity of the steel wheel. Retaining bars are installed at both openings of the bearing. The retaining bars can prevent the rolling balls in the bearing from rotating unstably, enabling the bearing to operate stably.

[0014] Preferably, a cam is installed on the inner wall of the bearing. Mounting holes are formed on the surface of the cam. The mounting holes are used to connect with the output shaft of the motor.

[0015] Preferably, a diaphragm is installed on the inner wall of the steel wheel. A threaded rod is rotatably connected to the back of the cylinder body. The cylinder body can be connected to the motor through the threaded rod.

[0016] Advantageous Effects

[0017] Compared with the prior art, the present utility model provides a flexible gear structure of a harmonic reducer, which has the following

[0018] advantageous effects:

[0019] For the flexible gear structure of the harmonic reducer, the space between the gear ring and the cylinder body can be enlarged through the grooves, enabling air to blow towards the surface of the gear ring through the grooves, so as to dissipate heat from the surface of the gear ring. The inflowing gas will enter the heat dissipation grooves through the heat dissipation holes. The overall temperature of the gear ring can be reduced through the heat dissipation grooves, and then flow to the surface of the steel wheel through the heat dissipation holes on the inner wall of the gear ring, so as to dissipate heat from the internal teeth of the gear ring, preventing the flexible gear from overheating and thermal deformation, and not affecting its precise geometric dimensions and the normal operation of the reducer. Description of the Drawings

[0020] Figure 1 is a schematic structural diagram of the present utility model;

[0021] Figure 2 is a schematic rear structural diagram of the present utility model;

[0022] Figure 3 is a schematic structural diagram of the gear ring of the present utility model;

[0023] Figure 4 is a schematic cross-sectional structural diagram of the gear ring of the present utility model;

[0024] Figure 5 is a schematic structural diagram of the steel wheel of the present utility model.

[0025] In the figure: 1. Cylinder body; 2. Gear ring; 3. First rack; 4. Steel wheel; 41. Second rack; 5. Heat dissipation groove; 6. Heat dissipation hole; 7. Mounting hole; 8. Positioning hole; 9. Positioning rod; 10. Groove; 11. Cam; 12. Bearing; 13. Retaining bar; 14. Diaphragm. Detailed Embodiments

[0026] The following will clearly and completely describe the technical solutions in the embodiments of the present utility model in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present utility model.

[0027] The present utility model provides a technical solution, a flexible gear structure of a harmonic reducer. Please refer to Figure 1 , including a cylinder body 1. A gear ring 2 is installed in the inner cavity of the cylinder body 1. The gear ring 2 is designed in a ring shape. Please refer to Figure 3 , the surface of the gear ring 2 is evenly provided with first racks 3, and a groove 10 is opened on the surface of the gear ring 2;

[0028] Please refer to Figure 1 , a steel gear 4 is arranged in the inner cavity of the gear ring 2. Please refer to Figure 5 , the surface of the steel gear 4 is evenly provided with second racks 41;

[0029] Please refer to Figure 4 , a heat dissipation groove 5 is arranged on the surface of the gear ring 2. The heat dissipation groove 5 is designed in an S shape. Heat dissipation holes 6 are evenly opened on the surface of the gear ring 2, and the heat dissipation holes 6 communicate with the inner cavity of the heat dissipation groove 5;

[0030] Through the groove 10, the space between the gear ring 2 and the cylinder body 1 can be enlarged, so that air can blow to the surface of the gear ring 2 through the groove 10, and heat dissipation treatment can be carried out on the surface of the gear ring 2. And the inflowing gas will enter the heat dissipation groove 5 through the heat dissipation holes 6. Through the heat dissipation groove 5, the overall temperature of the gear ring 2 can be reduced, and then it flows into the surface of the steel gear 4 through the heat dissipation holes 6 on the inner wall of the gear ring 2, and heat dissipation can be carried out on the inner teeth of the gear ring 2, preventing the flexible gear from overheating and thermal deformation, and not affecting its precise geometric dimensions and the normal operation of the reducer.

[0031] Please refer to Figure 3 , positioning holes 8 are evenly opened on the surface of the gear ring 2. Please refer to Figure 1 , positioning rods 9 are screwed into the inner cavities of the positioning holes 8, and the positioning rods 9 can be fixedly connected to the installation surface of the mechanical system.

[0032] Please refer to Figure 5 , the steel gear 4 is also designed in a ring shape. A bearing 12 is installed in the inner cavity of the steel gear 4. Retaining bars 13 are installed at both openings of the bearing 12. Through the retaining bars 13, the rotation of the balls in the bearing 12 can be prevented from being unstable, so that the bearing 12 can operate stably.

[0033] A cam 11 is installed on the inner wall of the bearing 12, and a mounting hole 7 is opened on the surface of the cam 11. The mounting hole 7 is used to connect with the output shaft of the motor.

[0034] The inner wall of the steel wheel 4 is provided with a diaphragm 14. Please refer to Figure 2 , and a threaded rod 15 is screwed on the back surface of the cylinder body 1. The cylinder body 1 can be connected to the electric motor through the threaded rod 15.

[0035] The working process of this device is as follows: First, the positioning rod 9 can be fixedly connected to the installation surface of the mechanical system, the output shaft of the electric motor can be connected through the installation hole 7, and the cylinder body 1 is connected to the electric motor through the threaded rod 15. Then, the space between the gear ring 2 and the cylinder body 1 can be enlarged through the groove 10, so that air can blow to the surface of the gear ring 2 through the groove 10, and the surface of the gear ring 2 can be cooled. Finally, the inflowing gas will enter the heat dissipation groove 5 through the heat dissipation hole 6. The overall temperature of the gear ring 2 can be reduced through the heat dissipation groove 5, and then flow into the surface of the steel wheel 4 through the heat dissipation holes 6 on the inner wall of the gear ring 2, and the inner teeth of the gear ring 2 can be cooled, preventing the flexspline from overheating and thermally deforming, and not affecting its precise geometric dimensions and the normal operation of the reducer.

[0036] It should be noted that in this article, relational terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the term "comprising", "including" or any other variant thereof is intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements not only includes those elements, but also includes other elements not expressly listed, or also includes elements inherent to such process, method, article or device.

[0037] Although the embodiments of the present invention have been shown and described, for those of ordinary skill in the art, it can be understood that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principle and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A harmonic reducer flexible wheel structure, characterized in that: include: A cylinder (1), wherein a gear ring (2) is installed in the inner cavity of the cylinder (1), the gear ring (2) is annular in design, a first rack (3) is evenly distributed on the surface of the gear ring (2), and a groove (10) is opened on the surface of the gear ring (2); A steel wheel (4) is arranged in the inner cavity of the gear ring (2), and a second rack (41) is evenly distributed on the surface of the steel wheel (4); A heat dissipation groove (5) is arranged on the surface of the gear ring (2); the heat dissipation groove (5) is designed to be S-shaped; heat dissipation holes (6) are evenly opened on the surface of the gear ring (2); and the heat dissipation holes (6) are all communicated with the inner cavity of the heat dissipation groove (5).

2. The flexible wheel structure of a harmonic reducer according to claim 1, characterized in that: Positioning holes (8) are evenly formed on the surface of the gear ring (2), and the inner cavities of the positioning holes (8) are all screwed with positioning rods (9).

3. The flexible wheel structure of a harmonic reducer according to claim 1, characterized in that: The steel wheel (4) is also of annular design, a bearing (12) is installed in the inner cavity of the steel wheel (4), and blocking bars (13) are installed on both side openings of the bearing (12).

4. The flexible wheel structure of a harmonic reducer according to claim 3 is characterized in that: A cam (11) is installed on the inner wall of the bearing (12), and a mounting hole (7) is opened on the surface of the cam (11).

5. The flexible wheel structure of a harmonic reducer according to claim 4, characterized in that: A diaphragm (14) is installed on the inner wall of the steel wheel (4), and a threaded rod (15) is screwed on the back of the cylinder (1).

Images