Wear-resistant and anti-slip automobile synchronizer spline gear hub

Abstract

The utility model discloses a wear-resistant anti-slip automobile synchronizer spline gear hub which comprises an inner ring and a sliding block, a center hole is axially formed in the inner side wall of the inner ring, and inner spline teeth are arranged on the inner side wall of the center hole. According to the utility model, the wear-resisting block is arranged in the connecting groove, and the anti-falling groove and the sliding groove which are connected with the sliding block are formed in the wear-resisting block, so that when the wear-resisting block is used, the sliding block is in contact with the wear-resisting block when sliding back and forth, and the wear-resisting block made of alloy quenched and tempered steel has better wear-resisting property, so that the service life is greatly prolonged; after the wear-resisting blocks are inserted into the connecting grooves, radial slippage is avoided through the narrowing parts of the connecting grooves, the wear-resisting blocks are prevented from axially slipping from the connecting grooves by inserting the limiting pins between the wear-resisting blocks and the limiting holes, connection is very stable, and the wear-resisting blocks are not prone to falling off under the condition that the overall weight is not increased as much as possible through the arrangement of the first reinforcing ribs and the second reinforcing ribs. The structural strength of the inner ring and the outer ring is improved, and the service life is prolonged.

Description

Technical Field

[0001] The utility model relates to the technical field of automobile gearbox equipment, in particular to a wear-resistant and anti-slip automobile synchronizer flower gear hub. Background Art

[0002] The automobile synchronizer is a device that synchronizes the gears that are engaged with each other during the gear shift. During the gear shift process, the circumferential speeds of the meshing rings of the pair of gears to be meshed should be equal to each other in order to smoothly engage the gear. Otherwise, there will be impact and noise between the two gear rings, which will affect the life of the gears. In order to facilitate gear shifting, the automobile transmission is equipped with synchronizers between the commonly used gears to synchronize the meshing pair of gears first and then mesh. The inertial synchronizer is used in the synchronous transmission in the prior art. It is mainly composed of components such as a spline hub, a coupling sleeve, and a synchronous lock ring. It relies on friction to achieve synchronization. The spline hub with an internal and external spline structure is generally manufactured by a powder metallurgy method, so that the multi-step complex shape of the hub structure can be pressed and formed at one time. However, the traditional structure has the defects of poor wear resistance between the spline hub and the coupling sleeve and easy slippage with the slider pin structure in the warm pressing sintering process. For this reason, there is a public technology. A wear-resistant and anti-slip automobile synchronizer gear hub, comprising a gear hub body, a plurality of external spline teeth on an outer ring, a plurality of internal spline teeth on a through hole, an annular groove between the gear hub body and the outer ring, a plurality of missing tooth portions and notches on the outer ring, the missing tooth portion comprising an installation groove and a limiting groove, a pin hole between the limiting groove and the gear hub body, limiting notches on both sides of the pin hole, a boss on the surface of the gear hub body, the boss comprising an annular boss and a plurality of connecting platforms, the inner wall of the connecting platform presenting an inwardly concave arc structure; the disclosed technology reduces the manufacturing difficulty through structural optimization, improves the mechanical performance of the synchronizer assembly, and prolongs the service life;

[0003] However, in actual use, the above-mentioned wear-resistant and anti-slip synchronizer gear hub still has the problem of insufficient strength resulting in insufficient service life, and its wear resistance still needs to be improved. There are also improved technologies that propose to improve the wear resistance by spraying a wear-resistant coating on the outer wall surface of the gear hub body. Usually, the wear-resistant coating is thin, and the actual wear resistance effect is relatively limited. Therefore, it is necessary to further improve and optimize the wear-resistant and anti-slip automobile synchronizer flower gear hub structure. Utility Model Content

[0004] The utility model aims to solve the shortcomings in the prior art and proposes a wear-resistant and anti-slip automobile synchronizer tooth hub.

[0005] In order to achieve the above-mentioned purpose, the utility model adopts the following technical scheme: a wear-resistant and anti-slip automobile synchronizer flower gear hub, comprising an inner ring and a slider, the inner side wall of the inner ring is axially provided with a center hole, the inner side wall of the center hole is provided with internal spline teeth, the circumferential outer wall of the inner ring is provided with a web plate, a first reinforcement structure for improving the strength of the inner ring is provided between the inner ring and the web plate, three groups of equally distributed outer rings are provided on the circumferential outer wall of the web plate, the outer walls of the three groups of outer rings are all provided with external spline teeth, a second reinforcement structure for improving the strength of the outer ring is provided between the outer ring and the web plate, the circumferential outer wall of the web plate and between two adjacent groups of the three groups of outer rings are provided with connecting grooves, the inner side wall of the connecting groove is clamped with a wear-resistant block, the inner side wall of the wear-resistant block is provided with an anti-slip groove that penetrates from front to back, the inner wall of the wear-resistant block is provided with a sliding groove for penetrating the anti-slip groove and the wear-resistant block away from the inner ring axis, and a limiting structure for preventing the wear-resistant block from slipping is provided between the wear-resistant block and the connecting groove.

[0006] As a further description of the above technical solution:

[0007] The first reinforcement structure includes multiple groups of first reinforcement ribs, and the multiple groups of first reinforcement ribs are all arranged between the outer wall of the inner ring circumference and the side wall of the web, and the multiple groups of first reinforcement ribs are evenly distributed in a circle centered on the inner ring axis.

[0008] As a further description of the above technical solution:

[0009] The second reinforcement structure includes three groups of second reinforcement ribs, and the three groups of second reinforcement ribs are respectively fixedly connected between the three groups of outer ring inner side walls and the webs.

[0010] As a further description of the above technical solution:

[0011] The limiting structure includes a narrowing portion, a limiting pin and a limiting hole. The limiting hole is arranged on the inner side wall of the connecting groove and the axis of the limiting hole is perpendicular to the axis of the inner ring. The limiting pin is arranged through the inner wall of the wear-resistant block and extends toward one side of the axis of the inner ring. The end of the limiting pin extending toward the axis of the inner ring is fixedly connected to the inner side wall of the limiting hole. The narrowing portion is arranged on the inner side wall of the connecting groove and is located at the intersection of the connecting groove and the outer ring. The front view cross-sectional shape of the wear-resistant block is consistent with the front view cross-sectional size of the inner cavity of the connecting groove.

[0012] As a further description of the above technical solution:

[0013] The wear-resistant block is alloy quenched and tempered steel.

[0014] As a further description of the above technical solution:

[0015] The inner wall of the web is provided with a plurality of groups of weight-reducing holes which penetrate front to back.

[0016] The utility model has the following beneficial effects:

[0017] 1. Compared with the prior art, the wear-resistant and anti-slip automobile synchronizer flower gear hub has a wear-resistant block in the connecting groove, and an anti-slip groove and a sliding groove for connecting with the slider are arranged on the wear-resistant block. When in use, the slider contacts the wear-resistant block when sliding back and forth. The wear-resistant block made of alloy quenched and tempered steel has good wear resistance and greatly improves the service life. After the wear-resistant block is inserted into the connecting groove, the radial slippage is avoided by the narrowing part of the connecting groove, and the wear-resistant block is avoided from axial slipping from the connecting groove by inserting a limit pin between the wear-resistant block and the limit hole, and the connection is very stable.

[0018] 2. Compared with the prior art, the wear-resistant and anti-slip automobile synchronizer flower gear hub improves the structural strength of the inner ring and the outer ring and increases the service life without increasing the overall weight as much as possible through the arrangement of the first reinforcing rib and the second reinforcing rib. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 This is a schematic diagram of the overall structure of a wear-resistant and anti-slip automobile synchronizer tooth hub proposed by the utility model;

[0020] Figure 2 This is a schematic cross-sectional view of a local structure of a connection groove of a wear-resistant and anti-slip automobile synchronizer hub proposed by the utility model;

[0021] Figure 3 The utility model discloses a partial cross-sectional view of the side structure of a wear-resistant block of a toothed hub of a synchronizer for an automobile which is wear-resistant and anti-slip.

[0022] Legend:

[0023] 1. Inner ring; 2. Internal spline teeth; 3. Width plate; 4. First reinforcing rib; 5. Outer ring; 6. External spline teeth; 7. Second reinforcing rib; 8. Weight reduction hole; 9. Wear-resistant block; 10. Anti-slip groove; 11. Sliding groove; 12. Limit pin; 13. Connecting groove; 14. Limit hole; 15. Narrowing part. DETAILED DESCRIPTION

[0024] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0025] Reference Figures 1 to 3The utility model provides a wear-resistant and anti-slip automobile synchronizer gear hub: comprising an inner ring 1 and a slider, wherein the inner side wall of the inner ring 1 is axially provided with a center hole, and the inner side wall of the center hole is provided with internal spline teeth 2, and the torque is transmitted to the wheel shaft through the internal spline teeth 2;

[0026] like Figure 1 As shown, in order to improve the structural strength of the connection between the inner ring 1 and the web 3, the circumferential outer wall of the inner ring 1 is provided with a web 3, and the inner wall of the web 3 is provided with a plurality of groups of weight-reducing holes 8 that penetrate front and back. A first reinforcing structure for improving the strength of the inner ring 1 is provided between the inner ring 1 and the web 3. The first reinforcing structure includes a plurality of groups of first reinforcing ribs 4, and the plurality of groups of first reinforcing ribs 4 are all provided between the circumferential outer wall of the inner ring 1 and the side wall of the web 3. The plurality of groups of first reinforcing ribs 4 are equally distributed in a circle with the axis of the inner ring 1 as the center, and are supported between the web 3 and the inner ring 1 by the plurality of groups of first reinforcing ribs 4, so as to improve the structural strength of the connection between the inner ring 1 and the web 3.

[0027] like Figure 1 As shown, in order to improve the structural strength of the connection between the web 3 and the outer ring 5, three groups of equally distributed outer rings 5 ​​are arranged on the circumferential outer wall of the web 3, and the outer walls of the three groups of outer rings 5 ​​are all provided with external spline teeth 6. A second reinforcement structure for improving the strength of the outer ring 5 is arranged between the outer ring 5 and the web 3. The second reinforcement structure includes three groups of second reinforcement ribs 7. The three groups of second reinforcement ribs 7 are respectively fixedly connected between the inner side walls of the three groups of outer rings 5 ​​and the web 3, and the three groups of outer rings 5 ​​are respectively supported by the three groups of second reinforcement ribs 7 to improve their structural strength.

[0028] like Figure 1 , Figure 2 as well as Figure 3 As shown, in order to improve the wear resistance when in contact with the slider, the outer wall of the circumference of the web 3 and between two adjacent groups of the three groups of outer rings 5 ​​are provided with connecting grooves 13, the inner wall of the connecting groove 13 is clamped with a wear-resistant block 9, the inner wall of the wear-resistant block 9 is provided with an anti-slip groove 10 that penetrates from front to back, the inner wall of the wear-resistant block 9 is provided with a sliding groove 11 that penetrates the anti-slip groove 10 and the side of the wear-resistant block 9 away from the axis of the inner ring 1, the wear-resistant block 9 is alloy quenched and tempered steel, the slider is slidably connected to the inner wall of the anti-slip groove 10 and the sliding groove 11, and the wear-resistant block 9 made of alloy quenched and tempered steel greatly improves the wear resistance of the contact range with the slider;

[0029] like Figure 2 , Figure 3As shown, in order to prevent the wear-resistant block 9 from slipping during use, a limiting structure for preventing the wear-resistant block 9 from slipping is arranged between the wear-resistant block 9 and the connecting groove 13, and the limiting structure includes a narrowing portion 15, a limiting pin 12 and a limiting hole 14. The limiting hole 14 is arranged on the inner side wall of the connecting groove 13 and the axis of the limiting hole 14 is perpendicular to the axis of the inner ring 1. The limiting pin 12 is arranged on the inner wall of the wear-resistant block 9 and extends toward one side of the axis of the inner ring 1. The end of the limiting pin 12 extending toward the axis of the inner ring 1 is fixedly connected to the inner side wall of the limiting hole 14, the narrowing portion 15 is arranged on the inner side wall of the connecting groove 13 and is located at the intersection of the connecting groove 13 and the outer ring 5. The front view cross-sectional shape of the wear-resistant block 9 is consistent with the front view cross-sectional size of the inner cavity of the connecting groove 13. After the wear-resistant block 9 is inserted into the connecting groove 13, the radial slipping can be avoided by the narrowing portion 15, and the axial slipping of the wear-resistant block 9 can be avoided by inserting the limiting pin 12.

[0030] Working principle: multiple groups of first reinforcing ribs 4 are used to support the web 3 and the inner ring 1, thereby improving the structural strength of the connection between the inner ring 1 and the web 3; three groups of second reinforcing ribs 7 are used to support three groups of outer rings 5 ​​respectively, thereby improving their structural strength; the slider is slidably connected to the inner wall of the anti-slip groove 10 and the sliding groove 11; the wear-resistant block 9 made of alloy tempered steel greatly improves the wear resistance of the contact range with the slider; after the wear-resistant block 9 is inserted into the connecting groove 13, the radial slippage can be avoided through the narrowing portion 15; and the axial slippage of the wear-resistant block 9 can be avoided by inserting the limit pin 12.

[0031] Finally, it should be noted that the above is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments or make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A wear-resistant and anti-slip automobile synchronizer gear hub, characterized in that: The invention comprises an inner ring (1) and a slider, wherein the inner side wall of the inner ring (1) is axially provided with a center hole, the inner side wall of the center hole is provided with internal spline teeth (2), the circumferential outer wall of the inner ring (1) is provided with a web plate (3), a first reinforcement structure for improving the strength of the inner ring (1) is provided between the inner ring (1) and the web plate (3), three groups of equally distributed outer rings (5) are provided on the circumferential outer wall of the web plate (3), the outer walls of the three groups of outer rings (5) are all provided with external spline teeth (6), and a reinforcing structure for improving the strength of the outer ring (5) is provided between the outer ring (5) and the web plate (3). The second reinforcing structure comprises a connecting groove (13) provided on the circumferential outer wall of the web (3) and between two adjacent groups of the three groups of outer rings (5); a wear-resistant block (9) is clamped on the inner wall of the connecting groove (13); an anti-slip groove (10) is provided on the inner wall of the wear-resistant block (9) and is connected to ...

2. The wear-resistant and anti-slip automobile synchronizer gear hub according to claim 1, characterized in that: The first reinforcement structure comprises a plurality of groups of first reinforcement ribs (4), the plurality of groups of first reinforcement ribs (4) being arranged between the circumferential outer wall of the inner ring (1) and the side wall of the web (3), and the plurality of groups of first reinforcement ribs (4) being equally distributed in a circle with the axis of the inner ring (1) as the center.

3. The wear-resistant and anti-slip automobile synchronizer gear hub according to claim 1, characterized in that: The second reinforcement structure comprises three groups of second reinforcement ribs (7), and the three groups of second reinforcement ribs (7) are respectively fixedly connected between the inner side walls of the three groups of outer rings (5) and the webs (3).

4. The wear-resistant and anti-slip automobile synchronizer gear hub according to claim 1, characterized in that: The limiting structure comprises a narrowing portion (15), a limiting pin (12) and a limiting hole (14); the limiting hole (14) is arranged on the inner side wall of the connecting groove (13) and the axis of the limiting hole (14) is perpendicular to the axis of the inner ring (1); the limiting pin (12) is arranged through the inner wall of the wear-resistant block (9) and extends toward one side of the axis of the inner ring (1); the end of the limiting pin (12) extending toward the axis of the inner ring (1) is fixedly connected to the inner side wall of the limiting hole (14); the narrowing portion (15) is arranged on the inner side wall of the connecting groove (13) and is located at the intersection of the connecting groove (13) and the outer ring (5); the front view cross-sectional shape of the wear-resistant block (9) is consistent with the front view cross-sectional size of the inner cavity of the connecting groove (13).

5. The wear-resistant and anti-slip automobile synchronizer gear hub according to claim 1, characterized in that: The wear-resistant block (9) is alloy quenched and tempered steel.

6. The wear-resistant and anti-slip automobile synchronizer gear hub according to claim 1, characterized in that: The inner wall of the web (3) is provided with a plurality of groups of weight-reducing holes (8) that penetrate front to back.

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