A gear transmission mechanism

Abstract

This utility model relates to the field of transmission mechanism technology, and in particular to a gear transmission mechanism, including a hollow bushing. A first retaining ring and a second retaining ring are respectively provided on the inner walls of the bushing at its two ends. A first bearing and a second bearing are respectively fitted tightly into the two ends of the inner wall of the bushing, with the first bearing abutting against the first retaining ring and the second bearing abutting against the second retaining ring. A mounting groove is formed on the end face of the bushing, and the outer wall of the mounting groove communicates with the outer wall of the bushing. An annular baffle is provided on the bottom wall of the mounting groove. An annular groove is also provided on the inner wall of the mounting groove. A spring and a circumferential gear are installed in the mounting groove, with the circumferential gear meshing with the inner wall of the mounting groove. One end of the spring abuts against the bottom wall of the mounting groove, and the other end abuts against one end of the circumferential gear. An annular baffle is installed in the annular groove, with the inner end face of the annular baffle abutting against the outer end face of the circumferential gear. The structural design of the mounting groove with an opening on one side solves the problem of parts easily falling off in the prior art.

Description

Technical Field

[0001] This utility model relates to the field of transmission mechanism technology, and in particular to a gear transmission mechanism. Background Technology

[0002] like Figure 1 As shown, this is a transmission mechanism in the prior art, which uses a separate component. The inner wall of the bushing is stepped, including a gear mounting section with a larger inner diameter and a bearing mounting section with a smaller inner diameter. The gear is tightly fitted in the gear mounting section and meshes with the inner surface of the gear mounting section. The outer end face of the gear meshes with another transmission mechanism, thereby achieving transmission between the two transmission mechanisms. The bearing is tightly fitted in the bearing mounting section. Because the existing design uses a separate component, the parts are easy to fall off during disassembly and assembly. Moreover, the axial positions of the bearing and the gear are different. When the gear rotates, the position with the greatest axial torque is located on the inner side of the gear. The existing transmission mechanism cannot place the bearing on the inner side of the gear to provide effective support for the axial torque caused by the gear's operation, resulting in a decrease in bearing life and affecting the load-bearing capacity of the transmission mechanism.

[0003] Therefore, in order to address the above problems, this utility model urgently needs to provide a gear transmission mechanism. Utility Model Content

[0004] The purpose of this utility model is to provide a gear transmission mechanism that solves the problem of parts easily falling off in the prior art through a structural design with an opening on one side for the mounting groove.

[0005] A gear transmission mechanism includes a hollow bushing, with a first retaining ring and a second retaining ring respectively provided on the inner wall of the bushing close to its two ends. A first bearing and a second bearing are respectively tightly fitted at both ends of the inner wall of the bushing, with the first bearing abutting against the first retaining ring and the second bearing abutting against the second retaining ring.

[0006] An annular mounting groove is provided on the end face of the bushing, and the outer wall of the mounting groove is in communication with the outer wall of the bushing; an annular baffle is provided on the bottom wall of the mounting groove at intervals from the bushing; and an annular groove is also provided on the inner wall of the mounting groove.

[0007] A spring and a circumferential gear, which are aligned with the axis of the bushing, are installed in the mounting groove. The circumferential gear meshes with the inner wall of the mounting groove. One end of the spring abuts against the bottom wall of the mounting groove, and the other end abuts against one end of the circumferential gear. An annular baffle is installed in the annular groove, and the inner end face of the annular baffle abuts against the outer end face of the circumferential gear.

[0008] Furthermore, the outer end face of the circumferential gear is provided with a limiting groove that matches the annular baffle, and the annular baffle is engaged in the limiting groove.

[0009] Furthermore, the outer wall of the bushing is provided with transmission teeth at circumferential intervals, and each transmission tooth is distributed at equal intervals around the axis of the bushing.

[0010] Furthermore, guide blocks are also provided around the outside of the barrier wall, and the thickness of the guide blocks is the same as the height of the barrier wall.

[0011] Furthermore, the inner wall of the end of the bushing away from the mounting groove is provided with a first thread.

[0012] Furthermore, the outer surface of the bushing is provided with a second thread.

[0013] Furthermore, the annular baffle is a C-shaped open ring.

[0014] Furthermore, the inner diameters of the first bearing and the second bearing are the same.

[0015] Furthermore, it also includes an annular sleeve with an inner diameter that matches the inner diameters of the first and second bearings.

[0016] Furthermore, the transmission teeth are located between the mounting groove and the second thread.

[0017] The gear transmission mechanism provided by this utility model has the following advantages compared with the prior art:

[0018] The gear transmission mechanism provided by this utility model radially separates the circumferential gear and the first bearing through the inner wall of the mounting groove, and fixes the first bearing to the inner side of the circumferential gear through the first retaining ring. The inner side of the circumferential gear provides the most effective operating support at the position where the axial torque caused by the rotation of the circumferential gear is the greatest, thereby improving the strength and service life of the first bearing. After the circumferential gear is axially meshed and installed on the outer side of the inner wall of the mounting groove, an annular baffle is installed in the annular groove to limit the circumferential gear and prevent it from dislodging during transmission, thus achieving modularization of the components. Attached Figure Description

[0019] To more clearly illustrate the specific embodiments of this utility model or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0020] Figure 1 The exploded view shows the transmission mechanism in the prior art described in the background section.

[0021] Figure 2 This is a schematic diagram (sectional view) of the bushing described in this utility model;

[0022] Figure 3This is a schematic diagram (sectional view) of the gear transmission mechanism described in this utility model;

[0023] Figure 4 This is a three-dimensional sectional view of the gear transmission mechanism described in this utility model;

[0024] Figure 5 This is a schematic diagram (perspective view) of the gear transmission mechanism described in this utility model;

[0025] Figure 6 This is a schematic diagram (sectional view) of the installation of the gear transmission mechanism described in this utility model;

[0026] Figure 7 This is a schematic diagram (three-dimensional view) of the installation of the gear transmission mechanism described in this utility model.

[0027] Explanation of reference numerals in the attached figures:

[0028] 1. Bushing; 2. First retaining ring; 3. Second retaining ring; 4. First bearing; 5. Second bearing; 6. Mounting groove; 7. Circumferential gear; 8. Baffle wall; 9. Annular groove; 10. Spring; 11. Annular baffle; 12. Limiting groove; 13. Transmission gear; 14. Guide block; 15. Second thread; 16. Annular sleeve; 17. Inner shaft; 18. Outer shaft; 19. Front axle cover; 20. Rear axle cover; 21. Third bearing. Detailed Implementation

[0029] The technical solution of this utility model will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0030] In the description of this utility model, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. 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. Therefore, they should not be construed as limitations on this utility model.

[0031] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0032] like Figure 2 , Figure 3 , Figure 4 , Figure 5 As shown, the gear transmission mechanism provided by this utility model includes a hollow bushing 1. A first retaining ring 2 and a second retaining ring 3 are respectively provided on the inner wall of the bushing 1 close to the two ends. A first bearing 4 and a second bearing 5 are respectively tightly fitted at both ends of the inner wall of the bushing 1. The first bearing 4 abuts against the first retaining ring 2, and the second bearing 5 abuts against the second retaining ring 3.

[0033] An annular mounting groove 6 is provided on the end face of the bushing 1, and the outer wall of the mounting groove 6 is in communication with the outer wall of the bushing 1; an annular baffle 8 is provided on the bottom wall of the mounting groove 6 at intervals from the bushing 1; and an annular groove 9 is also provided on the inner wall of the mounting groove 6.

[0034] A spring 10 and a circumferential gear 7, which are aligned with the axis of the bushing 1, are installed in the mounting groove 6. The circumferential gear 7 meshes with the inner wall of the mounting groove 6. One end of the spring 10 abuts against the bottom wall of the mounting groove 6, and the other end abuts against one end of the circumferential gear 7. An annular baffle 11 is installed in the annular groove 9. The inner end face of the annular baffle 11 abuts against the outer end face of the circumferential gear 7.

[0035] The gear transmission mechanism provided by this utility model radially separates the circumferential gear 7 and the first bearing 4 by the inner wall of the mounting groove 6, and fixes the first bearing 4 to the inner side of the circumferential gear 7 by the first retaining ring 2. The most effective operating support is provided at the position where the axial torque caused by the rotation of the circumferential gear 7 is the largest, i.e., the inner side of the circumferential gear, thereby improving the strength and service life of the first bearing 4. After the circumferential gear 7 is axially meshed and installed on the outer side of the inner wall of the mounting groove 6, the annular baffle 11 is installed in the annular groove 9 to limit the circumferential gear 7 and prevent the circumferential gear from dislodging during the transmission process, thus achieving modularization of the components.

[0036] like Figure 3 , Figure 4 , Figure 5 As shown, the outer end face of the circumferential gear 7 is provided with a limiting groove 12 that matches the annular baffle 11, and the annular baffle 11 is engaged in the limiting groove 12.

[0037] like Figure 2 , Figure 3 , Figure 4 , Figure 5 As shown, the outer side wall of the bushing 1 is provided with transmission teeth 13 at intervals along the circumference, and each transmission tooth 13 is distributed at equal intervals around the axis of the bushing 1.

[0038] like Figure 3 , Figure 4 , Figure 5 As shown, a guide block 14 is also provided outside the baffle wall 8, and the thickness of the guide block 14 is the same as the height of the baffle wall 8.

[0039] In this embodiment, the inner surface of the end of the bushing 1 away from the mounting groove 6 is provided with a first thread.

[0040] like Figure 2 , Figure 3 , Figure 4 , Figure 5 As shown, the outer surface of the bushing 1 is provided with a second thread 15.

[0041] In this embodiment, the annular baffle 11 is a C-shaped open annulus.

[0042] like Figure 3 , Figure 4 , Figure 5 As shown, the inner diameters of the first bearing 4 and the second bearing 5 are the same.

[0043] like Figure 3 , Figure 4 , Figure 5 As shown, it also includes an annular sleeve 16 with an inner diameter that is the same as the inner diameter of the first bearing 4 and the second bearing 5.

[0044] like Figure 2 , Figure 3 , Figure 4 , Figure 5 As shown, the transmission tooth 13 is located between the mounting groove 6 and the second thread 15.

[0045] like Figure 6 , Figure 7 The diagram shows the installation of the gear transmission mechanism of this utility model. The gear transmission mechanism meshes with the outer shaft 18 through the circumferential gear 7. The inner shaft 17 is installed in the first bearing 4 and is limited by the shaft shoulder. The front shaft cover 19 is screwed into the first thread and the second bearing 5 is limited by the shaft cover. The rear shaft cover is installed at the other end of the inner shaft 17. The inner shaft 17 and the outer shaft 18 are rotatably connected by the third bearing 21.

[0046] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this utility model.

Claims

1. A gear transmission mechanism, characterized in that: The sleeve (1) is hollow. The inner walls of the sleeve (1) are respectively provided with a first retaining ring (2) and a second retaining ring (3) close to the two ends. The inner walls of the sleeve (1) are respectively fitted with a first bearing (4) and a second bearing (5). The first bearing (4) abuts against the first retaining ring (2), and the second bearing (5) abuts against the second retaining ring (3). An annular mounting groove (6) is provided on the end face of the bushing (1), and the outer wall of the mounting groove (6) is in communication with the outer wall of the bushing (1); an annular baffle (8) is provided on the bottom wall of the mounting groove (6) at intervals from the bushing (1); an annular groove (9) is also provided on the inner side wall of the mounting groove (6). A spring (10) and a circumferential gear (7) that coincide with the axis of the bushing (1) are installed in the mounting groove (6). The circumferential gear (7) meshes with the inner wall of the mounting groove (6). One end of the spring (10) abuts against the bottom wall of the mounting groove (6), and the other end abuts against one end of the circumferential gear (7). An annular baffle (11) is installed in the annular groove (9). The inner end face of the annular baffle (11) abuts against the outer end face of the circumferential gear (7).

2. The gear mechanism of claim 1, wherein: The outer end face of the circumferential gear (7) is provided with a limiting groove (12) that matches the annular baffle (11), and the annular baffle (11) is engaged in the limiting groove (12).

3. The gear mechanism of claim 2, wherein: The outer side wall of the bushing (1) is provided with transmission teeth (13) at intervals along the circumference, and each transmission tooth (13) is distributed at equal intervals around the axis of the bushing (1).

4. The gear mechanism of claim 3, wherein: A guide block (14) is also provided outside the baffle (8), and the thickness of the guide block (14) is the same as the height of the baffle (8).

5. The gear mechanism of claim 4, wherein: The inner wall of the end of the bushing (1) away from the mounting groove (6) is provided with a first thread.

6. The gear mechanism of claim 5, wherein: The outer surface of the bushing (1) is provided with a second thread (15).

7. The gear mechanism of claim 6, wherein: The annular baffle (11) is a C-shaped open annular ring.

8. The gear mechanism of claim 7, wherein: The inner diameters of the first bearing (4) and the second bearing (5) are the same.

9. The gear mechanism of claim 8, wherein: It also includes an annular sleeve (16) with an inner diameter that is the same as the inner diameter of the first bearing (4) and the second bearing (5).

10. The gear mechanism of claim 9, wherein: The transmission tooth (13) is located between the mounting groove (6) and the second thread (15).

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