Synchronizer combination gear assembly, synchronizer and vehicle

Abstract

The utility model provides a synchronizer combination gear assembly, a synchronizer and a vehicle. The synchronizer combination gear assembly comprises a combination gear ring with teeth, a force bearing ring arranged on the combination gear ring and an elastic part arranged between the force bearing ring and the combination gear ring. Moreover, the force bearing ring and the combined gear ring are coaxially arranged and can rotate relative to the combined gear ring, a first protruding block is arranged on the force bearing ring, a second protruding block is arranged on the combined gear ring, and the second protruding block is located on the rotating path of the first protruding block. The first protruding block is pushed by canine teeth of the synchronizer gear sleeve before the second protruding block, the force bearing ring can be driven to rotate relative to the combined gear ring and extrude the elastic part, and when the second protruding block is pushed by the canine teeth of the synchronizer gear sleeve, the combined gear ring can be driven to rotate synchronously. According to the synchronizer combination gear assembly, violent impact between the force bearing ring and the combination gear ring can be prevented, noise generated in the working process of a synchronizer can be reduced, and meanwhile the service life of the synchronizer can be prolonged.

Description

Technical Field

[0001] The utility model relates to the technical field of synchronizers, in particular to a synchronizer coupling tooth assembly. Simultaneously, the utility model also relates to a synchronizer provided with the synchronizer coupling tooth assembly, and a vehicle provided with the dog synchronizer. Background Art

[0002] The synchronizer (usually with a synchronizer ring) of an automotive transmission is an indispensable structure in the gear shifting process. Traditional manual transmissions, dual-clutch automatic transmissions, and new energy transmissions with gears all require synchronizers for gear shifting. Its function is to smoothly transfer the speed of the shaft at the target gear to the required speed of the vehicle through the friction resistance of the synchronizer ring during gear shifting, so as to complete the gear shifting action. At the same time, it makes the gear shifting process comfortable and has good NVH (Noise, Vibration, Harshness) performance.

[0003] However, to reduce product costs, some transmissions use dog-tooth synchronizers without synchronizer rings. While this improves product competitiveness, the large speed difference during shifting can cause the dog-tooth and mating teeth to violently collide, which can shorten the synchronizer's service life. Furthermore, when the driver shifts gears under different operating conditions or lightly taps the accelerator while coasting, the sleeve dog teeth and mating teeth collide directly, generating a loud knocking noise that creates a negative experience for the driver and passengers. Utility Model Content

[0004] In view of this, the present invention aims to provide a synchronizer coupling tooth assembly to reduce the noise generated during the operation of the synchronizer and to extend the service life of the synchronizer.

[0005] In order to achieve the above-mentioned purpose, the technical solution of the utility model is achieved as follows:

[0006] A synchronizer coupling gear assembly comprises a coupling gear ring having teeth, a load-bearing ring provided on the coupling gear ring, and an elastic portion provided between the load-bearing ring and the coupling gear ring;

[0007] The bearing ring is coaxially arranged with the coupling gear ring and can rotate relative to the coupling gear ring. The bearing ring is provided with a first protrusion, and the coupling gear ring is provided with a second protrusion.

[0008] The first protrusion is pushed by the dog teeth of the synchronizer sleeve before the second protrusion, and the pushing of the first protrusion can drive the bearing ring to rotate relative to the combined gear ring and squeeze the elastic part. When the second protrusion is pushed by the dog teeth of the synchronizer sleeve, it can drive the combined gear ring and the synchronizer sleeve to rotate synchronously.

[0009] Furthermore, the second convex block is provided with an avoidance groove, the first convex block is arranged in the avoidance groove and is arranged to protrude outward relative to the second convex block;

[0010] A limiting portion is provided between the coupling gear ring and the bearing ring, and the limiting portion is used to limit the second protrusion from escaping from the avoidance groove.

[0011] Furthermore, the limiting portion includes a limiting hole provided on the bearing ring and a limiting column provided on the combined gear ring;

[0012] The limiting hole is an arc-shaped hole extending along the circumference of the bearing ring, and the limiting column is inserted into the limiting hole.

[0013] Furthermore, the limiting column is a bolt screwed on the combined gear ring, and the bearing ring is connected to the combined gear ring through the bolt.

[0014] Furthermore, the bearing ring is provided on one side of the axial direction of the combined gear ring, and the second protrusion is provided along the radial outward protrusion of the combined gear ring;

[0015] A radially outwardly protruding boss is provided on the end surface of the load-bearing ring and / or the coupling gear ring, and the load-bearing ring and the coupling gear ring are in contact with each other via the boss.

[0016] Furthermore, the first protrusions are multiple and evenly distributed along the circumference of the bearing ring; and / or,

[0017] There are a plurality of second protrusions evenly distributed along the circumference of the combined gear ring.

[0018] Furthermore, the coupling gear ring is provided with a mounting groove, and the mounting groove is an arc-shaped groove extending along the circumference of the coupling gear ring;

[0019] The elastic part includes a spring arranged in the installation groove. The load-bearing ring is provided with a stopper inserted into the installation groove. When the load-bearing ring rotates relative to the combined gear ring, the spring can be squeezed by the stopper.

[0020] Furthermore, part of the spring is arranged to protrude outward relative to the installation groove, and the bearing ring is provided with a receiving groove corresponding to the installation groove;

[0021] The accommodating groove is used to accommodate the protruding portion of the spring, and the stopper is arranged in the accommodating groove.

[0022] Compared with the prior art, the present invention has the following advantages:

[0023] The synchronizer coupling gear assembly described in the present invention comprises a coupling gear ring, a bearing ring, and an elastic portion disposed therebetween, with a first protrusion disposed on the bearing ring and a second protrusion disposed on the coupling gear ring. As a result, the synchronizer sleeve can first push against the first protrusion, causing the bearing ring to rotate relative to the coupling gear ring, thereby squeezing the elastic portion and providing a vibration-damping and buffering effect. Subsequently, when the second protrusion is pushed against the canine teeth of the synchronizer sleeve, it can drive the coupling gear ring to rotate synchronously, thereby achieving gear shifting. This prevents the bearing ring and the coupling gear ring from violently colliding, thereby reducing noise generated during synchronizer operation and extending the service life of the synchronizer.

[0024] Furthermore, by providing a stopper that restricts the first protrusion from exiting the escape groove, it is possible to ensure that at least a portion of the second protrusion is always located within the escape groove of the second protrusion, thereby effectively preventing the load ring from becoming stuck on one side of the second protrusion and affecting the normal function of the synchronizer. The stopper comprises a stopper hole provided on the load ring and a stopper post provided on the coupling gear ring, resulting in a simple structure and easy design and implementation.

[0025] Secondly, the limiting post is a bolt screwed onto the coupling toothed ring, and the bearing ring is connected to the coupling toothed ring via the bolt, which allows the limiting post to have a dual function and eliminates the need for a connector between the bearing ring and the coupling toothed ring, which not only facilitates layout but also reduces costs. The bearing ring and the coupling toothed ring abut against each other via the boss, which reduces the contact area between the two and effectively prevents the bearing ring and the coupling toothed ring from sticking together, thereby improving the smoothness of the bearing ring's rotation relative to the coupling toothed ring.

[0026] Furthermore, the presence of multiple first protrusions evenly distributed along the circumference of the load-bearing ring and multiple second protrusions evenly distributed along the circumference of the coupling gear ring improves the uniformity of force applied to both the load-bearing ring and the coupling gear ring, thereby enhancing the smoothness of rotation for both and effectively preventing eccentric jamming. The provision of a mounting groove on the coupling gear ring facilitates the installation of the spring, while the provision of a stopper facilitates the load-bearing ring to squeeze the spring, thereby buffering vibrations. The provision of a receiving groove further secures the spring between the load-bearing ring and the coupling gear ring, thereby ensuring the spring's buffering and vibration reduction effects.

[0027] Another object of the present invention is to provide a synchronizer, on which the synchronizer coupling tooth assembly as described above is provided.

[0028] The synchronizer of the present invention can reduce the noise generated during the operation of the synchronizer by providing the synchronizer coupling tooth assembly as described above, and at the same time, can also extend the service life of the synchronizer.

[0029] In addition, the present invention also provides a vehicle, on which the synchronizer as described above is provided.

[0030] The vehicle described in the present invention has all the beneficial effects of the above-mentioned synchronizer, which will not be described in detail here. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] The accompanying drawings, which constitute part of the present invention, are intended to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are intended to explain the present invention and do not constitute an improper limitation of the present invention. In the accompanying drawings:

[0032] Figure 1 This is a structural diagram of a synchronizer coupling gear assembly according to an embodiment of the present utility model;

[0033] Figure 2 This is a diagram of the assembly state of the combined gear ring and the spring according to an embodiment of the present utility model;

[0034] Figure 3 This is a structural diagram of the combined gear ring according to an embodiment of the present utility model;

[0035] Figure 4 This is a structural schematic diagram of the load-bearing ring described in an embodiment of the utility model.

[0036] Description of reference numerals:

[0037] 1. Combined gear ring; 2. Load-bearing ring; 3. Bolt; 4. Spring;

[0038] 101, first protrusion; 1011, avoidance groove; 102, boss; 103, threaded hole; 104, mounting groove; 201, second protrusion; 202, stopper; 203, accommodating groove; 204, limiting hole. DETAILED DESCRIPTION

[0039] It should be noted that, in the absence of conflict, the embodiments of the present invention and the features therein can be combined with each other.

[0040] In the description of this utility model, it should be noted that the terms "upper," "lower," "inner," and "outer," etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings and are intended solely to facilitate the description of this utility model and simplify the description. They do not indicate or imply that the devices or components referred to must have a specific orientation, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limitations on this utility model. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0041] Furthermore, in the description of this utility model, unless otherwise explicitly defined, the terms "mounted," "connected," "connect," and "connector" should be interpreted broadly. For example, they can refer to fixed, removable, or integral connections; mechanical or electrical connections; direct or indirect connections through an intermediary; and internal communication between two components. Those skilled in the art will understand the specific meanings of these terms in this utility model based on specific circumstances.

[0042] The present invention will be described in detail below with reference to the accompanying drawings and in combination with embodiments.

[0043] The existing dog tooth synchronizer uses the impact of the dog teeth during the gear shifting process to make the speed of the shaft where the target gear is located reach the speed required by the vehicle speed. This produces a large knocking noise and also reduces the service life of the synchronizer. Although, for new energy transmissions, they are equipped with motors with fast speed response and high control accuracy. When shifting, the motor can be used to adjust the speed of the target gear shaft to the speed required by the current vehicle speed before shifting. However, the speed regulation cannot adjust the two speeds to exactly the same, because the top of the dog tooth synchronizer is a plane. If the two speeds are the same, a tooth-to-tooth situation will occur during the gear shift, resulting in a gear shift failure.

[0044] On the other hand, if the difference between the two speeds is too large, the gear teeth will violently collide when shifting, producing a knocking noise that can be uncomfortable for the driver and passengers. Therefore, a reasonable speed difference between the two speeds is required during gear shifts, which places high demands on the control strategy. However, everyone's driving habits are different, and even the same person's driving behavior varies under different road conditions. Therefore, it is impossible to ensure that the two speeds are within a reasonable speed difference during gear shifts under different operating conditions, and the noise problem cannot be solved.

[0045] To this end, this embodiment specifically proposes a novel synchronizer coupling gear assembly, which generally comprises a coupling gear ring 1 having teeth, a bearing ring 2 disposed on the coupling gear ring 1, and an elastic portion disposed between the bearing ring 2 and the coupling gear ring 1. Furthermore, the bearing ring 2 is coaxially arranged with the coupling gear ring 1 and is rotatable relative to the coupling gear ring 1. The bearing ring 2 is provided with a first protrusion 201, and the coupling gear ring 1 is also provided with a first protrusion 201.

[0046] Among them, the first protrusion 201 is pushed by the dog teeth of the synchronizer sleeve before the second protrusion 101, and the first protrusion 201 is pushed, which can drive the load-bearing ring 2 to rotate relative to the combined gear ring 1 and squeeze the elastic part, and when the second protrusion 101 is pushed by the dog teeth of the synchronizer sleeve, it can drive the combined gear ring 1 and the synchronizer sleeve to rotate synchronously.

[0047] The synchronizer coupling gear assembly of this embodiment includes a coupling gear ring 1, a bearing ring 2, and an elastic portion disposed therebetween, with a first protrusion 201 disposed on the bearing ring 2 and a second protrusion 101 disposed on the coupling gear ring 1. Thus, the dog teeth of the synchronizer sleeve can first push against the first protrusion 201, causing the bearing ring 2 to rotate relative to the coupling gear ring 1, thereby squeezing the elastic portion to provide a vibration-damping and buffering effect. Then, when the second protrusion 101 is pushed against by the dog teeth of the synchronizer sleeve, it can drive the coupling gear ring 1 to rotate synchronously with the synchronizer sleeve, thereby achieving gear shifting. This prevents the bearing ring 2 from violently colliding with the coupling gear ring 1, thereby reducing noise generated during operation and extending the service life of the synchronizer.

[0048] Based on the above overall introduction, an exemplary structure of the synchronizer combined gear assembly of this embodiment is referred to as Figure 1 and Figure 2 As shown in , the synchronizer combined tooth assembly is also in annular shape as a whole, which is the same as the prior art. In addition, as a preferred embodiment, Figure 1 As shown in , the bearing ring 2 is disposed on one axial side of the coupling gear ring 1, and the second protrusion 101 is provided radially outwardly of the coupling gear ring 1. Furthermore, radially outwardly projecting bosses 102 are provided on the end faces of the bearing ring 2 and / or the coupling gear ring 1, through which the bearing ring 2 and the coupling gear ring 1 abut. This arrangement reduces the contact area between the bearing ring 2 and the coupling gear ring 1, effectively preventing the bearing ring 2 and the coupling gear ring 1 from adhering to each other, thereby improving the smoothness of the rotation of the bearing ring 2 relative to the coupling gear ring 1.

[0049] Specifically, as a preferred embodiment, the structure of the combined gear ring 1 of this embodiment is as follows: Figure 3 As shown in , it is generally annular in shape, with multiple teeth evenly distributed on its outer circumference, which are used to mesh with external gears to transmit power. The bosses 102 are specifically provided on the coupling gear ring 1, and are arranged in a plurality of spaced intervals along the circumference of the coupling gear ring 1. It is understood that in addition to providing the bosses 102 on the coupling gear ring 1, providing them on the bearing ring 2, or providing them on both the coupling gear ring 1 and the bearing ring 2, is also feasible.

[0050] In addition, as a specific embodiment, Figure 3 As shown in FIG, the inner portion of the combined gear ring 1 is provided with an annular groove arranged along the axial direction of the shaft hole, and the second protrusion 101 is arranged in the annular groove. Figure 4 As shown in , it is in an annular shape as a whole, and the first protrusion 201 protrudes inwardly along the radial direction of the bearing ring 2.

[0051] In a further embodiment, a relief groove 1011 is provided on the second protrusion 101, and a portion of the first protrusion 201 is located in the relief groove 1011. Under the action of the elastic portion, the first protrusion 201 is arranged to protrude outward relative to the second protrusion 101. As a result, the first protrusion 201 can be pushed by the dog teeth of the synchronizer gear sleeve before the second protrusion 101, thereby squeezing the elastic portion and achieving buffering and vibration reduction. At the same time, a limiting portion is provided between the gear ring 1 and the bearing ring 2, and the limiting portion is used to limit the first protrusion 201 from escaping the relief groove 1011. In this embodiment, by providing a limiting portion that limits the protrusion from escaping the relief groove 1011, it is possible to ensure that at least a portion of the first protrusion 201 is always located within the relief groove 1011 of the second protrusion 101, thereby effectively preventing the bearing ring 2 from detaching from the second protrusion 101 and becoming stuck on one side of the second protrusion 101, thereby affecting the normal function of the synchronizer.

[0052] As a preferred embodiment, Figure 1 、 Figure 3 and Figure 4 As shown in , the first protrusion 201 is roughly rectangular, and the second protrusion 101 is also roughly rectangular. The avoidance groove 1011 is specifically provided at one end of the second protrusion 101 near the first protrusion 201 and is adapted to the first protrusion 201. This design can improve the stability of the installation of the first protrusion 201. The axial length of the first protrusion 201 and the avoidance groove 1011 in the bearing ring 2 is shorter than the length of the second protrusion 101, that is, the avoidance groove 1011 does not penetrate the second protrusion 101. This arrangement can better prevent the first protrusion 201 from separating from the second protrusion 101.

[0053] It should be noted that, in addition to being rectangular, the first protrusion 201 and the second protrusion 101 may also be semicircular or other shapes. Furthermore, in addition to making the axial length of the first protrusion 201 and the avoidance groove 1011 shorter than the length of the second protrusion 101 in the bearing ring 2, it is also feasible to have the avoidance groove 1011 extend through the second protrusion 101 and make the axial length of the first protrusion 201 in the bearing ring 2 greater than or equal to the length of the second protrusion 101.

[0054] Continue to refer to Figure 1 and Figure 3 As shown in , as a preferred embodiment, the limiting portion of this embodiment includes a limiting hole 204 provided on the bearing ring 2 and a limiting post provided on the coupling gear ring 1. Furthermore, the limiting hole 204 is an arc-shaped hole extending along the circumference of the bearing ring 2, and the limiting post is inserted into the limiting hole 204. This structure not only enables the bearing ring 2 to rotate relative to the coupling gear ring 1, but also has the advantages of being simple in structure and easy to design and implement.

[0055] At this time, in order to obtain better use effect, as a further implementation method, Figure 1 As shown in the figure, the limiting column is a bolt 3 screwed on the coupling gear ring 1, and the bearing ring 2 is connected to the coupling gear ring 1 through the bolt 3. Specifically, a threaded hole 103 is provided on the coupling gear ring 1, and the bolt 3 is specifically screwed into the threaded hole 103. This design can make the limiting column have a dual role, and can eliminate the setting of the connecting piece between the bearing ring 2 and the coupling gear ring 1, which is not only convenient for layout but also can reduce costs. In addition, in order to improve the limiting effect, as a preferred embodiment, the limiting holes 204 are uniformly distributed along the circumference of the bearing ring 2, and the number is not limited to that shown in the figure. The limiting column and the limiting hole 204 are set in a one-to-one correspondence.

[0056] It is understandable that, in addition to providing the limiting holes 204 in the bearing ring 2 and the limiting posts on the coupling gear ring 1, it is also feasible to provide the limiting holes 204 in the coupling gear ring 1 and the limiting posts on the bearing ring 2. In addition, in addition to using the bolts 3 threadedly connected to the coupling gear ring 1, the limiting posts can also be welded posts connected to the coupling gear ring 1.

[0057] In addition, in addition to using bolts 3 for the limiting column, the limiting column can also be made into a bare rod structure inserted into the limiting hole 204, and it is also feasible to additionally provide bolts connecting the load-bearing ring 2 and the combined gear ring 1. However, in this case, it is necessary to further provide an avoidance hole for avoiding the bolts when the load-bearing ring 2 rotates.

[0058] In addition, combined Figure 2 and Figure 3 As shown in , as a preferred embodiment, the coupling gear ring 1 is provided with a mounting groove 104, which is an arc-shaped groove extending along the circumference of the coupling gear ring 1. The elastic portion includes a spring 4 disposed within the mounting groove 104, and the load ring 2 is provided with a stopper 202 inserted into the mounting groove 104. When the load ring 2 rotates relative to the coupling gear ring 1, the stopper 202 can squeeze the spring 4. In this embodiment, the provision of the mounting groove 104 on the coupling gear ring 1 facilitates the installation of the spring 4, while the provision of the stopper 202 facilitates the compression of the spring 4 by the load ring 2 to buffer vibration.

[0059] Here, it should be noted that, in addition to providing the mounting groove 104 and arranging the spring 4 in the mounting groove 104, the mounting groove 104 may not be provided, and the spring 4 may be arranged in the avoidance groove 1011 and arranged between the first protrusion 201 and the second protrusion 101, which is also feasible.

[0060] As a further embodiment, Figure 2 and Figure 3As shown in , the mounting groove 104 is provided on one side of the second protrusion 101, and the mounting groove 104 and the spring 4 are arranged in a one-to-one correspondence with the second protrusion 101. In this embodiment, by arranging the mounting groove 104 on one side of the second protrusion 101, the spring 4 in the mounting groove 104 can be arranged close to the first protrusion 201, which can reduce the force transmission path, thereby better receiving the thrust applied to the first protrusion 201 by the synchronizer sleeve, thereby achieving a better vibration damping and buffering effect. It should be noted that it is also feasible to arrange the mounting groove 104 and the spring 4 in a non-one-to-one correspondence with the second protrusion 101.

[0061] At this time, as a further embodiment, Figure 2 and Figure 4 As shown in FIG, a portion of spring 4 is arranged to protrude outward relative to mounting groove 104. Load ring 2 is provided with a receiving groove 203 corresponding to mounting groove 104. Receiving groove 203 is used to accommodate the protruding portion of spring 4, and the aforementioned stopper 202 is disposed within receiving groove 203. In this embodiment, the provision of receiving groove 203 can improve the secure installation of spring 4 between load ring 2 and coupling gear ring 1, thereby facilitating the buffering and vibration reduction effect of spring 4.

[0062] Here, it should be noted that, in addition to making part of the spring 4 protrude outward and providing the receiving groove 203 on the bearing ring 2, it is also feasible to accommodate the entire spring 4 in the installation groove 104 and not provide the receiving groove 203 on the bearing ring 2.

[0063] Furthermore, as a further embodiment, a plurality of first protrusions 201 are evenly distributed along the circumference of the bearing ring 2. Furthermore, as a preferred embodiment, six first protrusions 201 are evenly distributed along the circumference of the bearing ring 2. Furthermore, to achieve better performance, a plurality of second protrusions 101 are evenly distributed along the circumference of the coupling gear ring 1. Furthermore, as a preferred embodiment, the number of second protrusions 101 is the same as the number of first protrusions 201, namely, six evenly distributed along the circumference of the coupling gear ring 1.

[0064] It should be noted that the number of the first bumps 201 and the second bumps 101 can be adjusted according to design requirements. In addition, the number of the first bumps 201 and the second bumps 101 can be the same or different.

[0065] Based on the above overall description, when assembling the synchronizer gear assembly of this embodiment, Figure 2 As shown in , first place the spring 4 in the mounting groove 104, then assemble the bearing ring 2 on the combined gear ring 1, and place the stopper 202 on one side of the spring 4 to support the spring 4. Then, as shown in Figure 1As shown, the bearing ring 2 is then secured to the coupling gear ring 1 using bolts 3. The limiting holes 204 in the bearing ring 2 prevent the first and second protrusions 201 from completely disengaging, preventing the first protrusion 201 from becoming stuck. The center hole of the bearing ring 2 fits with a small clearance between the second protrusions 101 on the coupling gear ring 1, ensuring that the bearing ring 2 is concentric with the coupling gear ring 1 and maintaining the bearing ring 2's motion trajectory.

[0066] In addition, this embodiment also relates to a synchronizer, on which the synchronizer coupling tooth assembly as described above is provided.

[0067] During a gear shift or a light throttle press, the synchronizer's canine teeth first push against the first bump 201 on the bearing ring 2. This then compresses the spring 4, causing relative rotation between the bearing ring 2 and the coupling gear ring 1. When the first bump 201 rotates into the full clearance groove 1011, the synchronizer sleeve can continue to push the second bump 101 forward until the shift is complete. The compression of the spring 4 acts as a vibration dampener, reducing noise and extending the life of the synchronizer.

[0068] In addition, this embodiment also provides a vehicle, which is provided with the synchronizer as described above.

[0069] The vehicle of this embodiment has all the beneficial effects of the above-mentioned synchronizer, which will not be described in detail here.

[0070] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A synchronizer gear assembly, characterized in that: It comprises a combined toothed ring (1) having teeth, a bearing ring (2) provided on the combined toothed ring (1), and an elastic portion provided between the bearing ring (2) and the combined toothed ring (1); The bearing ring (2) is coaxially arranged with the combined toothed ring (1) and is rotatable relative to the combined toothed ring (1); the bearing ring (2) is provided with a first protrusion (201), and the combined toothed ring (1) is provided with a second protrusion (101); The first protrusion (201) is pushed by the dog teeth of the synchronizer gear sleeve before the second protrusion (101), and the pushing of the first protrusion (201) can drive the bearing ring (2) to rotate relative to the combined gear ring (1) and squeeze the elastic part. When the second protrusion (101) is pushed by the dog teeth of the synchronizer gear sleeve, it can drive the combined gear ring (1) and the synchronizer gear sleeve to rotate synchronously.

2. The synchronizer gear assembly according to claim 1, characterized in that: The second convex block (101) is provided with an avoidance groove (1011), the first convex block (201) is arranged in the avoidance groove (1011), and is arranged to protrude outward relative to the second convex block (101) under the action of the elastic portion; A limiting portion is provided between the combined toothed ring (1) and the bearing ring (2), and the limiting portion is used to limit the first protrusion (201) from escaping from the avoidance groove (1011).

3. The synchronizer coupling tooth assembly according to claim 2, characterized in that: The limiting portion comprises a limiting hole (204) provided on the bearing ring (2), and a limiting column provided on the combined gear ring (1); The limiting hole (204) is an arc-shaped hole extending along the circumference of the bearing ring (2), and the limiting column is inserted into the limiting hole (204).

4. The synchronizer coupling tooth assembly according to claim 3, characterized in that: The limiting column is a bolt (3) screwed on the combined toothed ring (1), and the bearing ring (2) is connected to the combined toothed ring (1) via the bolt (3).

5. The synchronizer gear assembly according to claim 1, characterized in that: The bearing ring (2) is arranged on one axial side of the combined toothed ring (1), and the second protrusion (101) is arranged along the radial outward protrusion of the combined toothed ring (1); A radially outwardly protruding boss (102) is provided on the end surface of the load-bearing ring (2) and / or the combined toothed ring (1), and the load-bearing ring (2) and the combined toothed ring (1) are in contact with each other via the boss (102).

6. The synchronizer coupling tooth assembly according to claim 1, characterized in that: The first protrusions (201) are multiple and evenly distributed along the circumference of the bearing ring (2); and / or, The second protrusions (101) are multiple and evenly distributed along the circumference of the combined gear ring (1).

7. The synchronizer gear assembly according to any one of claims 1 to 6, characterized in that: The coupling toothed ring (1) is provided with a mounting groove (104), and the mounting groove (104) is an arc-shaped groove extending along the circumference of the coupling toothed ring (1); The elastic portion includes a spring (4) arranged in the installation groove (104); the load-bearing ring (2) is provided with a stopper (202) inserted into the installation groove (104); when the load-bearing ring (2) rotates relative to the combined gear ring (1), the spring (4) can be squeezed by the stopper (202).

8. The synchronizer coupling tooth assembly according to claim 7, characterized in that: Part of the spring (4) is arranged to protrude outward relative to the installation groove (104), and the load-bearing ring (2) is provided with a receiving groove (203) arranged corresponding to the installation groove (104); The accommodating groove (203) is used to accommodate the protruding portion of the spring (4), and the stopper (202) is arranged in the accommodating groove (203).

9. A synchronizer, characterized in that: The synchronizer is provided with a synchronizer coupling tooth assembly according to any one of claims 1 to 8.

10. A vehicle, characterized in that: The vehicle is provided with the synchronizer according to claim 9.

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