CN216895452U - Gear engagement self-adjusting device - Google Patents

Abstract

The application provides a gear engagement is from adjusting device, and its technical scheme main points are: the method comprises the following steps: the gear shifting device comprises a joint sleeve, a gear shifting device and a control device, wherein a guide groove and an internal spline which is in contact fit with a target gear joint gear ring are arranged in the joint sleeve; the guide teeth are arranged in the guide grooves in a sliding mode, an elastic piece is arranged between the guide teeth and the guide grooves, and the elastic piece enables the guide teeth to protrude out of the inner spline of the joint sleeve. The application provides a gear engagement self-adjusting device has the advantage that shortens the shift time.

Description

Gear engagement self-adjusting device

Technical Field

The application relates to the technical field of variable speed transmission, in particular to a gear engagement self-adjusting device.

Background

With the continuous pursuit of the economy and the dynamic performance of the automobile, the installation of the automatic transmission system on the electric automobile is receiving more and more attention from the automobile industry. An Automatic Mechanical Transmission (AMT) is regarded as an important choice for a transmission scheme of an electric vehicle due to advantages of simple structure, reliable performance, low cost, and the like. However, the synchronizer in the conventional AMT is equipped with a plurality of friction rings for eliminating the difference in the rotational speed of the sleeve and the target gear-engaging ring gear. In a traditional fuel oil automobile, due to the low response characteristic of an engine, the great rotating speed difference between an engagement sleeve and a target gear engagement gear ring in the gear shifting process is mainly eliminated by a friction ring of a synchronizer, so that the friction ring in the traditional AMT synchronizer is easy to damage and has a short service life; in the electric automobile, active synchronization can be performed by means of the rapid speed regulation capability of the driving motor, the rotating speed difference, even the angle difference, between the engaging sleeve and the target gear engaging gear ring is rapidly eliminated, and the existence of the friction ring is not beneficial to shortening the gear shifting time. It is a technical trend to eliminate a friction ring of a gear shifting mechanism in an AMT.

In the variable speed transmission system of an electric vehicle, a gear shifting mechanism plays an important role in the gear shifting process. The response condition of the engaging sleeve and the gear ring to be engaged in the engaging process directly influences the gear shifting quality in the driving process of the vehicle. During the process that the engaging sleeve moves axially to the target gear to engage the gear ring, the control system can control the rotating speed and the rotating angle of the engaging sleeve so as to enable the gear shifting mechanism to complete gear shifting in a shorter time. However, in the process of system motion control, due to factors such as control errors of devices such as a driving motor and a gear shifting motor, the rotation speed and the rotation angle of an inner toothed key of an engaging sleeve and an outer toothed key of a target gear ring may have certain deviation, and the deviation affects the gear shifting time.

In view of the above problems, it is desirable to provide a new solution.

SUMMERY OF THE UTILITY MODEL

An object of the embodiment of the application is to provide a gear engagement self-adjusting device, which has the advantage of shortening the gear shifting time.

In a first aspect, an embodiment of the present application provides a gear engagement self-adjusting device, which is used for realizing a fast shift, and adopts the following technical scheme:

the method comprises the following steps:

the gear shifting device comprises a joint sleeve, a gear shifting device and a control device, wherein a guide groove and an internal spline which is in contact fit with a target gear joint gear ring are arranged in the joint sleeve;

the guide teeth are arranged in the guide grooves in a sliding mode, an elastic piece is arranged between the guide teeth and the guide grooves, and the elastic piece enables the guide teeth to protrude out of the inner spline of the joint sleeve.

The gear shifting device is characterized in that a guide groove and a guide tooth sliding in the guide groove are arranged in the joint sleeve, an elastic part is arranged between the tail end of the guide tooth and the guide groove, so that the head end of the guide tooth protrudes out of an inner spline of the joint sleeve, in the gear shifting process, if the inner spline of the joint sleeve and a target gear joint gear ring have angle deviation, in the gear shifting process, the guide tooth protrudes out of the inner spline under the action of the elastic part, so that the guide tooth can be firstly contacted with the target gear joint gear ring, acting force is generated on the circumferential direction of the joint sleeve after the guide tooth is contacted with the target gear joint gear ring, the joint sleeve rotates, then the inner spline of the joint sleeve is aligned with the teeth of the target gear joint gear ring, and gear shifting is finally completed through joint.

Further, in this application embodiment, the guide way is provided with the first limit structure that carries out circumference spacing to the direction tooth.

Further, in the embodiment of the present application, the guide teeth are provided with a guide structure that contacts the target gear engagement ring gear.

Further, in the embodiment of the present application, the two sides of the engaging sleeve are respectively provided with the guide groove and the guide tooth facing oppositely in the axial direction.

Further, in this application embodiment, still include spline hub subassembly, spline hub subassembly includes along the axial uses locating part coaxial coupling's spline hub outer lane, suspension gasket, spline hub inner circle according to the order, spline hub outer lane suspension gasket and have relative pivoted degree of freedom between the spline hub inner circle, first window has been seted up to spline hub outer lane, suspension gasket with the second window has been seted up jointly to the spline hub inner circle, first elastomeric element sets up in the first window, the second elastomeric element sets up in the common second window.

Further, in this application embodiment, the limiting member is disposed in the first window in a penetrating manner, and first elastic members are disposed on both sides of the limiting member and the first window.

Further, in this application embodiment, the locating part overcoat is equipped with the sleeve, the sleeve has seted up the mounting plane in the circumferencial direction, be provided with on the mounting plane with first elastomeric element complex second limit structure, first window is provided with the same three limit structure that are used for with first elastomeric element complex.

Further, in the present embodiment, the first elastic member has a rigidity smaller than that of the second elastic member.

Further, in this application embodiment, an avoidance groove for avoiding the limiting member is provided on the inner ring of the spline hub.

Further, in this application embodiment, a fourth limiting structure cooperating with the second elastic component is disposed on the second window.

Therefore, the gear engagement self-adjusting device provided by the embodiment of the application has the advantages that the guide groove and the guide teeth sliding in the guide groove are arranged in the joint sleeve, the elastic part is arranged between the tail end of the guide teeth and the guide groove, the head end of the guide teeth protrudes out of the inner spline of the joint sleeve, in the gear shifting process, if the inner spline of the joint sleeve and the target gear joint gear ring have angular deviation, the guide teeth are protruded out of the inner spline under the action of the elastic part in the gear shifting process, the guide teeth are firstly contacted with the target gear joint gear ring, acting force is generated on the circumferential direction of the joint sleeve after the guide teeth are contacted with the target gear joint gear ring, the joint sleeve rotates, then the inner spline of the joint sleeve is aligned with the teeth of the target gear joint gear ring, and finally the gear shifting is completed through jointing, so that the gear engagement self-adjusting device provided by the application has the advantages of shortening the gear shifting time and reducing impact vibration generated in the gear shifting process And (5) effect.

Additional features and advantages of the present application will be set forth in the description which follows, and in part will be obvious from the description, or may be learned by the practice of the embodiments of the present application. The objectives and other advantages of the application may be realized and attained by the structure particularly pointed out in the written description and claims hereof as well as the appended drawings.

Drawings

Fig. 1 is a schematic structural diagram of a gear engagement self-adjusting device according to an embodiment of the present application.

Fig. 2 is a partially enlarged schematic view of a gear mesh self-adjusting device provided in an embodiment of the present application.

Fig. 3 is a partially enlarged schematic view of a gear engagement self-adjusting device according to an embodiment of the present application.

Fig. 4 is a schematic structural view of a guide tooth provided in an embodiment of the present application.

Fig. 5 is a schematic structural diagram of a gear engagement self-adjusting device according to an embodiment of the present application.

FIG. 6 is a schematic disassembled structure view of a splined hub assembly provided by an embodiment of the present application.

FIG. 7 is a structural schematic diagram of a splined hub outer ring according to an embodiment of the present application.

Fig. 8 is a schematic structural diagram of a suspension gasket according to an embodiment of the present application.

Fig. 9 is a schematic structural diagram of an inner ring of a key hub provided in an embodiment of the present application.

Fig. 10 is a schematic structural view of a sleeve according to an embodiment of the present disclosure.

Fig. 11 is a schematic disassembled structure view of a gear engagement self-adjusting device according to an embodiment of the present application.

Fig. 12 is a schematic diagram of a vehicle transmission utilizing a gear mesh self-adjusting device of the present application.

Fig. 13 is a schematic diagram of a vehicle transmission utilizing a gear mesh self-adjusting device of the present application.

Fig. 14 is a schematic diagram of a vehicle transmission utilizing a gear mesh self-adjusting device of the present application.

Fig. 15 is a schematic diagram of a vehicle transmission utilizing a gear mesh self-adjusting device of the present application.

In the figure: 100. a joint sleeve; 200. a guide tooth; 300. an elastic member; 400. a splined hub assembly; 500. the target gear engages the ring gear; 600. a power source; 700. a difference reducer; 800. a drive wheel; 110. a guide groove; 120. an internal spline; 210. a tooth base; 220. a tooth body; 230. a guide structure; 410. a first clamping plate; 420. a splined hub outer race; 430. a suspension spacer; 440. a splined hub inner ring; 450. a second clamping plate; 460. a limiting member; 470. a first elastic member; 480. a second elastic member; 490. a sleeve; 111. a first limit structure; 421. a first window; 422. a third limiting structure; 423. an external spline; 431. a second window; 432. a fourth limit structure; 441. an avoidance groove; 491. a mounting plane; 492. and a second limit structure.

Detailed Description

The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only a part of the embodiments of the present application, and not all of the embodiments. The components of the embodiments of the present application, generally described and illustrated in the figures herein, can be arranged and designed in a wide variety of different configurations. Thus, the following detailed description of the embodiments of the present application, presented in the accompanying drawings, is not intended to limit the scope of the claimed application, but is merely representative of selected embodiments of the application. All other embodiments, which can be derived by a person skilled in the art from the embodiments of the present application without making any creative effort, shall fall within the protection scope of the present application.

It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures. Meanwhile, in the description of the present application, the terms "first", "second", and the like are used only for distinguishing the description, and are not to be construed as indicating or implying relative importance.

Referring to fig. 1 to 15, a gear engagement self-adjusting device for realizing a fast shift includes:

a joint sleeve 100, wherein a guide groove 110 and an internal spline 120 for contacting and matching with the target gear joint ring gear 500 are arranged in the joint sleeve 100; the center line of the guide groove 110 may be parallel to the tooth strengthening center line of the internal spline 120 of the engaging sleeve 100, or may be disposed at a certain inclination angle.

The guide teeth 200 are slidably disposed in the guide grooves 110, the elastic members 300 are disposed between the guide teeth 200 and the guide grooves 110, and the elastic members 300 protrude the guide teeth 200 from the internal splines 120 of the sleeve 100 in a neutral state. The elastic member 300 may be a spring, or may be other elastic members such as rubber, and the center lines of the leading end and the trailing end of the guide tooth 200 may be aligned with each other, or may be disposed at a certain inclination angle, and the inclination angle may be the same as the inclination angle of the center line of the guide groove 110 and the center line of the spline 120 of the engaging sleeve 100.

Through the above technical solution, the guide groove 110 and the guide tooth 200 sliding in the guide groove 110 are arranged in the engaging sleeve 100, the elastic member 300 is arranged between the tail end of the guide tooth 200 and the guide groove 110, so that the head end of the guide tooth 200 protrudes out of the internal spline 120 of the engaging sleeve 100, during the shifting process, if there is an angular deviation between the internal spline 120 of the engaging sleeve 100 and the target gear engaging ring gear 500, during the shifting process, because the guide tooth 200 protrudes out of the internal spline 120 under the action of the elastic member 300, the guide tooth 200 will first contact with the target gear engaging ring gear 500, and after the guide tooth 200 contacts with the target gear engaging ring gear 500, an acting force is generated in the circumferential direction of the engaging sleeve 100, so that the engaging sleeve 100 rotates, then the internal spline 120 of the engaging sleeve 100 is aligned with the teeth of the target gear engaging ring gear 500, and finally the engagement completes the shifting, which not only can quickly eliminate the rotation angle difference, the gear shifting speed is improved, and impact vibration caused in the gear shifting process can be reduced.

In addition, the scheme adopted by the application can replace a transmission meshing sleeve, a traditional synchronizer and a friction locking ring in the traditional synchronizer are omitted, the condition that parts are easy to wear is avoided, and the overall use cost is effectively reduced.

Specifically, in some embodiments, the guide slots 110 and the guide teeth 200 are provided in multiple sets, and the multiple sets of guide slots 110 and the guide teeth 200 are uniformly distributed.

As one of the preferable solutions, three sets of guide grooves 110 and guide teeth 200 are provided, the three sets of guide grooves 110 and guide teeth 200 are uniformly distributed, and the provision of the multiple sets of guide grooves 110 and guide teeth 200 can improve the smoothness of the engagement process between the sleeve 100 and the target engagement ring gear, but the provision of too many guide grooves 110 and guide teeth 200 can reduce the stability of the transmission after the sleeve 100 is engaged with the target engagement ring gear, so that the provision of three or six sets of guide grooves 110 and guide teeth 200 is the most preferable solution in comprehensive consideration.

Further, in some of the embodiments, the guide groove 110 is provided with a first limit structure 111 that circumferentially limits the guide tooth 200.

Specifically, in some embodiments, the guide tooth 200 includes a tooth base 210 and a tooth body 220, two side surfaces of the tooth base 210 are provided with inclined planes, and the first limiting structure 111 is a side baffle plate extending from two side surfaces of the guide groove 110 and engaged with the two inclined planes of the tooth base 210, that is, a part of the guide groove 110 forms a dovetail groove structure and is further slidably engaged with the tooth base 210 to limit the guide tooth 200 in the circumferential direction.

In addition, the side surface of the guide tooth 200 may be a plane, and the guide groove 110 may be formed with a groove to be engaged with the side surface of the guide tooth 200.

Through the technical scheme, the first limiting structure 111 is used for limiting the guide teeth 200 in the circumferential direction, so that the guide teeth 200 can generate acting force on the engaging sleeve 100 after being contacted with a target gear engaging gear ring, the engaging sleeve 100 rotates and then aligns with the target gear engaging gear ring, and as one of the preferable schemes, two side surfaces of the tooth base 210 are arranged into inclined surfaces, so that the force can be favorably applied, and the sliding effect of the guide teeth 200 in the guide grooves 110 is improved.

Further, in some of the embodiments, the guide teeth 200 are provided with a guide structure 230 that contacts the target gear engaging ring gear.

Specifically, in some embodiments, the guide structure 230 is a guide tooth slope that is formed on the guide tooth 200 and contacts the target-gear-position engagement ring gear, wherein the guide tooth slope may be a single-sided slope or a double-sided slope.

With the above technical solution, the guide teeth 200 are provided with the guide tooth slopes, and after the guide tooth slopes are brought into contact with the target gear engaging ring gear, the teeth of the target gear engaging ring gear can be aligned with the internal splines 120 of the engaging sleeve 100 by the guide tooth slopes.

Further, in some embodiments, the two sides of the engaging sleeve 100 are respectively provided with the guide groove 110 and the guide tooth 200 facing oppositely in the axial direction, and the elastic member 300 is disposed between the guide groove 110 and the guide tooth 200.

Through the technical scheme, the engaging sleeve 100 can move towards two sides of the axial direction, so that the engaging sleeve is in contact fit with different target gear engaging gear rings, and switching between different gears is realized.

In addition, still be provided with on direction tooth 200 and guide way 110 and protruding or the recess with elastic component 300 complex, when elastic component 300 is the spring, can set up the arch on direction tooth 200 and guide way 110, overlap the spring cover and carry on spacingly to the spring on the arch, also can be recess on direction tooth 200 and guide way 110, overlap the spring in the recess and carry on spacingly to the spring, improve the stability that direction tooth 200 removed in guide way 110 through spacing to the spring.

Further, in some embodiments, the spline hub assembly 400 further includes a spline hub assembly 400, the spline hub assembly 400 includes a first clamping disk 410, a spline hub outer ring 420, a floating spacer 430, a spline hub inner ring 440 and a second clamping disk 450, which are coaxially connected in an axial direction by using a limiting member 460, the spline hub outer ring 420, the floating spacer 430 and the spline hub inner ring 440 have a relative rotational degree of freedom, the limiting member 460 axially limits the first clamping disk 410, the spline hub outer ring 420, the floating spacer 430, the spline hub inner ring 440 and the second clamping disk 450, the spline hub outer ring 420 defines a first window 421, the floating spacer 430 and the spline hub inner ring 440 define a second window 431 together, the first elastic member 470 is disposed in the first window 421, and the second elastic member 480 is disposed in the second window 431 together.

Specifically, the first clamping plate 410 is disposed on the outer layer of the web plate of the spline hub inner ring 440, the second clamping plate 450 is disposed on the outer side of the web plate of the spline hub outer ring 420, the web plate of the spline hub inner ring 440 and the web plate of the spline hub outer ring 420 are connected in a matching manner through the first clamping plate 410, the second clamping plate 450 and the limiting member 460, the first clamping plate 410 and the second clamping plate 450 mainly play a role in supporting and protecting, and the limiting member 460 may be a rivet.

The outer wall of the spline hub outer ring 420 is provided with an external spline 423, the spline hub outer ring 420 and the joint sleeve 100 are connected and matched with the external spline 423 through an internal spline 120, the limiting member 460 is arranged in the first window 421 in a penetrating manner, first elastic members 470 are arranged on two sides of the limiting member 460 and two sides of the first window 421, an avoiding groove 441 used for avoiding the limiting member 460 is formed in the spline hub inner ring 440, the first elastic member 470 and the second elastic member 480 are springs, the spline hub inner ring 440 and the spline hub outer ring 420 cannot be directly stressed by the same spring, and torsion force needs to be transmitted through the suspension spacer 430.

Specifically, when the engaging sleeve 100 contacts with the target gear ring, if there is an angular difference between the teeth of the internal spline 120 of the engaging sleeve 100 and the target gear ring, the guiding teeth 200 first contact with the teeth of the target gear ring, and then the guiding teeth 200 generate a circumferential force on the engaging sleeve 100, so that the engaging sleeve 100 rotates, the engaging sleeve 100 drives the spline hub outer ring 420 to rotate, when the spline hub outer ring 420 rotates, the first window 421 may extrude the first elastic component 470 on the limiting component 460, the first elastic component 470 absorbs the impact vibration, and then the spline hub outer ring 420 continues to rotate, and the limiting component 460 is extruded by the first elastic component 470, the limiting component 460 penetrates through the suspension gasket 430, so as to drive the suspension gasket 430 to rotate under the action of the limiting component 460, because the suspension gasket 430 and the spline hub inner ring 440 have a common second window 431, and the second elastic component 480 is disposed in the common second window 431, the floating washer 430 presses the second elastic member 480 through the second window 431, and further absorbs the impact vibration generated during the gear shifting process through the second elastic member 480.

Through the technical scheme, when the joint sleeve 100 is in contact with a target joint gear ring, gear shifting impact can be generated, and a spline hub assembly with two-stage torsional vibration is formed through the first elastic piece 300 and the second elastic piece 300 in the spline hub assembly 400, so that the gear shifting impact in the gear engaging process can be effectively relieved.

Further, in some embodiments, the limiting member 460 is externally sleeved with a sleeve 490, the sleeve 490 is provided with a mounting plane 491 in the circumferential direction, the mounting plane 491 is provided with a second limiting structure 492 matched with the first elastic member 470, and the first window 421 is provided with a third limiting structure 422 also used for being matched with the first elastic member 470.

Specifically, the second limiting structure 492 and the third limiting structure 422 may be protrusions or grooves, and when the first elastic component 470 is a spring, the spring is limited by being sleeved on the protrusions or the grooves, so as to improve stability.

The second position-limiting structure 492 may be a protrusion, the third position-limiting structure 422 may be a groove, the second position-limiting structure 492 may be a groove, the third position-limiting structure 422 may be a protrusion, or the second position-limiting structure 492 and the third position-limiting structure 422 may be a protrusion or a groove.

Through the above technical scheme, the sleeve 490 is sleeved outside the limiting member 460, wherein the sleeve 490 is arranged on the suspension gasket 430 in a penetrating manner, and the force transmission is realized through the sleeve 490, on one hand, the sleeve contacts with the first elastic member 470, so that the first elastic member 300 is deformed under the stress to absorb the impact vibration, on the other hand, the force is transmitted to the suspension gasket 430, so that the suspension gasket 430 extrudes the second elastic member 480, and the second elastic member 480 further absorbs the impact vibration.

Further, in some of the embodiments, the stiffness of the first elastic member 470 is less than the stiffness of the second elastic member 480.

By the above technical solution, the first elastic member 470 makes the spring damping force of the spline hub outer race 420 during the circumferential rotation smaller, when the engaging sleeve 100 is rotated by the guide teeth 200, the engaging sleeve 100 drives the spline hub outer race 420 to rotate, the first elastic member 470 in the spline hub outer race 420 preferentially absorbs the impact generated when the guide teeth 200 are in contact with the target engaging ring, the second elastic member 480 has a higher rigidity, for ensuring that, when the guide teeth 200 are brought into contact with the target engaging ring gear, the engaging sleeve 100 is smoothly rotated through a certain deflection angle, in the two-stage torsional vibration structure of the first elastic member 470 and the second elastic member 480, it is possible to smooth the entire shifting process, effectively absorb the circumferential shock generated during the contact of the guide teeth 200 with the target engaging ring gear, and certain rotation speed difference can be tolerated, and impact vibration generated in the gear shifting process is effectively reduced.

Further, in some embodiments, the second window 431 is provided with a fourth limiting structure 432 cooperating with the second elastic member 480.

Specifically, the fourth limiting structure 432 may be a protrusion or a groove, and when the second elastic component 480 is a spring, the spring is limited by being sleeved on the protrusion or the groove, so as to improve stability.

Referring to fig. 12 to 15, by using a gear-mesh self-adjusting device provided by the present application, in a vehicle gear shift, a power source 600 performs power transmission through a propeller shaft, and by sliding a sleeve 100 left and right on a splined hub, the sleeve 100 is engaged with target gear engaging ring gears 500 on left and right sides, and then power is transmitted to a reducer 700, i.e., a differential, through the propeller shaft according to different gears, and then further transmitted to a driving wheel 800 to perform driving.

The above description is only an example of the present application and is not intended to limit the scope of the present application, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, improvement and the like made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims (10)

1. A gear mesh self-adjusting apparatus for effecting quick shifts, comprising:

the gear engaging device comprises a joint sleeve (100), wherein a guide groove (110) and an internal spline (120) for being in contact fit with a target gear engaging gear ring (500) are arranged in the joint sleeve (100);

the guide gear (200) is arranged in the guide groove (110) in a sliding mode, an elastic piece (300) is arranged between the guide gear (200) and the guide groove (110), and the elastic piece (300) enables the guide gear (200) to protrude out of the inner spline (120) of the joint sleeve (100).

2. A gear mesh self-adjusting device according to claim 1, wherein the guide groove (110) is provided with a first stop formation (111) for circumferentially stopping the guide tooth (200).

3. A gear mesh self-adjusting device according to claim 1, characterized in that said guide tooth (200) is provided with a guide structure (230) in contact with said target gear engaging ring gear.

4. A gear engagement self-adjusting device according to claim 1, wherein said engaging sleeve (100) is provided at both sides thereof with guide grooves (110) and guide teeth (200) facing in opposite directions in the axial direction, respectively.

5. The gear mesh self-adjusting device according to claim 1, further comprising a spline hub assembly (400), wherein the spline hub assembly (400) comprises a spline hub outer ring (420), a suspension gasket (430) and a spline hub inner ring (440) which are coaxially connected by a limiting piece (460) along an axial direction in sequence, the spline hub outer ring (420), the suspension gasket (430) and the spline hub inner ring (440) have relative rotational freedom therebetween, the spline hub outer ring (420) is provided with a first window (421), the suspension gasket (430) and the spline hub inner ring (440) are provided with a second window (431) together, the first window (421) is provided with a first elastic component (470), and the second window (431) is provided with a second elastic component (480).

6. A gear mesh self-adjusting device according to claim 5, wherein the retaining member (460) is inserted into the first window (421), and both sides of the retaining member (460) and the first window (421) are provided with first elastic members (470).

7. A gear mesh self-adjusting device according to claim 6, wherein the limiting member (460) is sleeved with a sleeve (490), the sleeve (490) is provided with a mounting plane (491) in the circumferential direction, the mounting plane (491) is provided with a second limiting structure (492) matched with the first elastic member (470), and the first window (421) is provided with a third limiting structure also matched with the first elastic member (470).

8. A gear mesh self-adjusting device according to claim 5, wherein the stiffness of the first resilient member (470) is less than the stiffness of the second resilient member (480).

9. The gear engagement self-adjusting device according to claim 5, wherein an avoiding groove for avoiding the limiting piece (460) is formed on the spline hub inner ring (440).

10. A gear mesh self-adjusting device according to claim 5, wherein the second window (431) is provided with a fourth stop formation (432) cooperating with the second resilient member (480).

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