CN111623112A

CN111623112A - Shift engagement assembly and device

Info

Publication number: CN111623112A
Application number: CN202010542088.5A
Authority: CN
Inventors: 胡乙钦; 王月宏; 马占领
Original assignee: Zhejiang Shuangling Yixin Power Technology Co ltd
Current assignee: Ningbo Shenglong New Energy Vehicle Power Co ltd
Priority date: 2020-06-15
Filing date: 2020-06-15
Publication date: 2020-09-04

Abstract

The invention provides a shift engagement assembly and a device, wherein the shift engagement assembly comprises: the gear transmission device comprises a gear, a buffer gear, a first elastic buffer piece and a second elastic buffer piece; the gear stage gear includes: the gear body is provided with joint teeth which are respectively arranged on the end surface of the gear body along the axial direction and on the peripheral side surface of the gear body along the circumferential direction; the buffer teeth are coaxially installed in a wheel groove of the gear, the first elastic buffer member is arranged between the gear and the buffer teeth along the circumferential direction, and the second elastic buffer member is arranged between the gear and the buffer teeth along the axial direction, so that the buffer teeth are arranged beyond engaging teeth of the gear in an initial state. The invention can play the role of buffering simultaneously in the axial direction and the circumferential direction in the gear shifting process, and the axial elastic force and the circumferential elastic force can be respectively designed according to the impact degrees in the two directions so as to adapt to buffering under different impact degrees.

Description

Shift engagement assembly and device

Technical Field

The invention relates to the technical field of transmission gear shifting, in particular to a gear shifting joint assembly and a gear shifting joint device.

Background

At present, the existing electric control mechanical automatic gearbox, the automatic gearbox which is shifted by an electromagnetic clutch without a friction sheet, a speed changing bridge, an electric drive bridge with a neutral gear and the like have the problems of long power interruption time of the whole vehicle, abnormal gear shifting sound, large gear shifting impact, difficulty in gear disengagement and gear engagement failure.

The long power interruption time and the difficulty in gear shifting can cause that when the whole vehicle needs power output, the power output of a power assembly is insufficient, the speed of the whole vehicle is seriously reduced, even backward slip is caused in the uphill process, the current of a driving motor is excessively burnt, and the function safety of the whole vehicle and the driving experience of passengers are seriously influenced.

In order to solve the problems, although the problem of power interruption of the whole vehicle is solved by an automatic gearbox using a friction plate type electromagnetic clutch and a hydraulic clutch for gear shifting, the problem of clutch combination impact is not solved all the time. The reason for this is that the shift engagement structure does not have the problems associated with the axial damper device and the circumferential damper device. Therefore, the invention aims at the problems of long power interruption time, abnormal gear shifting noise, large gear shifting impact, difficult gear shifting and gear shifting failure of the whole vehicle, and needs to provide a further solution.

Disclosure of Invention

The present invention is directed to a shift engagement assembly and apparatus that overcomes the deficiencies of the prior art.

To achieve the above object, the present invention provides a shift engagement assembly including: the gear transmission device comprises a gear, a buffer gear, a first elastic buffer piece and a second elastic buffer piece;

the range gear includes: the gear body is provided with engaging teeth which are respectively arranged on the end surface of the gear body along the axial direction and on the peripheral side surface of the gear body along the circumferential direction;

the buffer teeth are coaxially mounted in the wheel grooves of the gear gears, the first elastic buffer is circumferentially arranged between the gear gears and the buffer teeth, and the second elastic buffer is axially arranged between the gear gears and the buffer teeth, so that the buffer teeth are arranged beyond the engaging teeth of the gear gears in an initial state.

As an improvement of the shift joint assembly of the present invention, a spring groove for accommodating the first elastic buffer member is formed at a bottom of the wheel groove.

As an improvement of the gear shift joint assembly of the present invention, the first elastic buffer member is a spring, one end of which abuts against the spring groove and the other end of which abuts against the buffer tooth.

As an improvement of the shift engaging assembly of the present invention, a spring stopper capable of abutting against the spring is provided on one surface of the buffer tooth opposite to the bottom of the wheel groove.

As an improvement of the gear shifting joint assembly, the bottom of the wheel groove is further provided with a limit groove which extends along the circumferential direction, and one surface of the buffer gear, which is opposite to the bottom of the wheel groove, is provided with a limit block which can be matched with the limit groove.

As an improvement of the gear shifting joint component, the number of the limiting grooves is two, and the two limiting grooves are arranged in a central symmetry mode.

As an improvement of the shift engagement assembly of the present invention, the first elastic buffer member is a wave spring which is accommodated in the wheel groove and applies a buffer acting force in an axial direction to the buffer teeth.

As an improvement of the shifting engagement assembly of the present invention, the shifting engagement assembly further includes a collar, the collar being located between the gear wheel and the cushion teeth, and a portion of the collar being received in a collar groove of the gear shaft.

To achieve the above object, the present invention provides a shift coupling device, comprising: a slip engagement gear and a shift engagement assembly as described above;

the sliding joint gear is meshed with the gear after being buffered by the buffer teeth.

As an improvement of the gearshift joint of the present invention, the tooth profile of the shift position gear and the sliding engagement gear is a rectangular tooth profile or a one-way engagement tooth profile, and the tooth profile of the shift position gear and the sliding engagement gear is a barbed tooth profile or a flat tooth profile.

Compared with the prior art, the invention has the beneficial effects that: the invention can play the role of buffering simultaneously in the axial direction and the circumferential direction in the gear shifting process, and the axial elastic force and the circumferential elastic force can be respectively designed according to the impact degrees in the two directions so as to adapt to buffering under different impact degrees. By applying the invention, the gear shifting impact and the gear shifting abnormal sound can be reduced or even eliminated.

In the disengaging (gear-off) process, after the input end torque is removed, the sliding engagement gear can be quickly pushed away to realize disengaging (gear-off) under the action of axial and circumferential elastic forces, and the gear-off difficulty (gear-off failure problem) is solved.

After the invention is adopted, the gear engaging action can be carried out without waiting until the rotation speed difference of the pre-engaged gears at the main and the driven end parts is close to or the same as each other during gear shifting, and even if the rotation speed difference is larger, gear beating, gear shifting impact and gear shifting abnormal sound can not occur during gear engaging due to the effect of simultaneous buffering in the axial direction and the circumferential direction, so that the gear shifting time is greatly saved, and the problem of long power interruption time of the whole vehicle is solved.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments described in the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.

FIG. 1 is a perspective diagrammatic view of one embodiment of the shift engagement assembly of the present invention;

FIG. 2 is an enlarged perspective view of the gear of FIG. 1;

FIG. 3 is an enlarged perspective view of the damper tooth of FIG. 1;

FIG. 4 is a partial cross-sectional view of one embodiment of the shift engagement device of the present invention;

FIG. 5 is a schematic view of a rectangular tooth profile;

FIG. 6 is a schematic illustration of a tooth surface being a barbed tooth surface;

fig. 7 to 11 are schematic views of the shift engagement device of the present invention for achieving a cushion shift.

Detailed Description

The present invention is described in detail below with reference to various embodiments, but it should be understood that these embodiments are not intended to limit the present invention, and those skilled in the art should be able to make modifications and substitutions on the functions, methods, or structures of these embodiments without departing from the scope of the present invention.

As shown in fig. 1 to 3, an embodiment of the present invention provides a shift engagement assembly 100, which includes: gear 1, buffering tooth 2, first elastic buffer 3 and second elastic buffer 4.

The gear wheel 1 is used for shifting, and comprises: the gear comprises a gear body 11, a wheel groove 12 arranged on the gear body 11 and a gear shaft 13 positioned in the middle of the wheel groove 12. The gear body 11 has engaging teeth 14, and the engaging teeth 14 are provided on an end surface of the gear body 11 in the axial direction and on a circumferential side surface of the gear body 11 in the circumferential direction, respectively. The engaging teeth 14 may be integrally formed, welded, or splined on the gear body 11.

The buffer gear 2 is used for playing a buffering role and is coaxially installed in a wheel groove 12 of the gear 1, a limiting block 21 and a spring stop 22 are arranged on one surface, opposite to the bottom of the wheel groove 12, of the buffer gear 2, and the limiting block 21 and the spring stop 22 can be connected to the buffer gear 2 in an integrated forming mode, a welding mode or a riveting mode and the like. Correspondingly, the bottom of the wheel groove 12 is further provided with a limiting groove 121 extending along the circumferential direction, and the limiting block 21 can slide along the limiting groove 121. In one embodiment, the number of the limiting grooves 121 is two, and the two limiting grooves 121 are arranged in a central symmetry manner.

The first and second

elastic buffers

3, 4 serve to buffer the auxiliary buffer teeth 2, so that the buffer teeth 2 are initially located beyond the engaging teeth 14 of the gear wheel 1. Specifically, the first elastic cushion 3 is arranged between the gear 1 and the damper teeth 2 in the circumferential direction, and the second elastic cushion 4 is arranged between the gear 1 and the damper teeth 2 in the axial direction. The number of the first elastic cushion 3 is set to be plural as necessary.

In order to facilitate the installation of the first elastic buffer 3 along the circumferential direction, a spring groove 122 for accommodating the first elastic buffer 3 is formed at the bottom of the wheel groove 12. In one embodiment, the first elastic buffer 3 is a spring. At this time, one end of the spring abuts against the spring groove 122, and the other end abuts against the spring stopper 22 of the buffer tooth 2, so that the buffer action in the circumferential direction can be realized.

In the above embodiment, when the spring stopper 22 of the buffer gear 2 contacts one end of the spring, the spring is compressed by rotating an angle, and after the spring is rotated to a proper angle, the buffer gear 2 is pressed, and the stopper 21 of the buffer gear 2 can fall into the stopper groove 121 of the gear 1.

The second elastic buffer 4 is accommodated in the wheel groove 12, and one surface of the second elastic buffer 4 is contacted with the gear body 11, and the other surface is contacted with the buffer tooth 2, so that the buffer action in the axial direction can be realized by applying the buffer action force on the buffer tooth 2 in the axial direction. In one embodiment, the second elastic buffer 4 is a wave spring.

In other embodiments, the first and second

elastic cushion members

3 and 4 may be combined into a cushion/spring type, or a round spring/disc spring + spring type, or a single cushion type.

In addition, to facilitate the engagement between the gear stage gear 1 and the cushion teeth 2, the shifting coupling assembly 100 further includes a collar 5, the collar 5 being located between the gear stage gear 1 and the cushion teeth 2, and the collar 5 being partially received in a collar groove of the gear shaft 13.

Based on the same technical concept, another embodiment of the invention also provides a shifting combination device.

As shown in fig. 4, the gearshift coupling device of the present embodiment includes: a slip joint gear 200 and a shift joint assembly 100 as above. The sliding engagement gear 200 is buffered by the buffer teeth 2 and then engaged with the range gear 1.

As shown in fig. 5 and 6, the tooth shapes of the engaging teeth 14 of the range gear 1 and the sliding engaging gear 200 are not limited, and may be, for example, a rectangular tooth shape or a one-way engaging tooth shape. The tooth surfaces of the engaging tooth 14 of the speed gear 1 and the sliding engaging gear 200 are a barb-shaped tooth surface or a flat tooth surface. Wherein the design as a barbed tooth surface prevents the risk of gear hopout.

As shown in fig. 7 to 11, when the shift coupling device of the present embodiment shifts gears, the shift engagement assembly 100 performs a damping function according to the following process: the sliding engagement gear 200 is initially disposed separately from the shift engagement assembly 100. When a gear shift is required, the buffer tooth 2 is axially and circumferentially higher than the engaging tooth 14 by a part of the distance due to the first and second

elastic buffers

3 and 4, so that the sliding engaging gear 200 first contacts the buffer tooth 2 in both axial and circumferential directions. That is, first, with the axial movement of the sliding engagement gear 200, when the sliding engagement gear 200 contacts the axially raised surface of the buffer tooth 2, the buffer tooth 2 is axially pressed, and the second elastic buffer 4 performs an axial buffering function. When the sliding engagement gear 200 starts to rotate relatively in the circumferential direction after contacting the engagement teeth 14, and after rotating a certain angle in the circumferential direction, the sliding engagement gear 200 contacts the circumferentially raised surface of the buffer teeth 2, and at this time, the buffer teeth 2 are pressed in the circumferential direction, and at this time, the first elastic buffer 3 plays a role in buffering in the circumferential direction.

In conclusion, the gear shifting device can play a role in buffering in the axial direction and the circumferential direction simultaneously in the gear shifting process, and the axial elastic force and the circumferential elastic force can be designed respectively according to the impact degrees in the two directions so as to adapt to buffering under different impact degrees. By applying the invention, the gear shifting impact and the gear shifting abnormal sound can be reduced or even eliminated.

It will be evident to those skilled in the art that the invention is not limited to the details of the foregoing illustrative embodiments, and that the present invention may be embodied in other specific forms without departing from the spirit or essential attributes thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein.

Furthermore, it should be understood that although the present description refers to embodiments, not every embodiment may contain only a single embodiment, and such description is for clarity only, and those skilled in the art should integrate the description, and the embodiments may be combined as appropriate to form other embodiments understood by those skilled in the art.

Claims

1. A shift engagement assembly, characterized by comprising: the gear transmission device comprises a gear, a buffer gear, a first elastic buffer piece and a second elastic buffer piece;

2. The shift joint assembly of claim 1, wherein a spring slot is defined in a bottom of the race for receiving the first elastomeric bumper.

3. The shift joint assembly of claim 1 or 2, wherein the first resilient cushion is a spring having one end abutting the spring groove and the other end abutting the cushion tooth.

4. The shift joint assembly of claim 3, wherein a face of the cushion tooth opposite the bottom of the wheel well is provided with a spring stop against which the spring can abut.

5. The gear shift joint assembly according to claim 1, wherein a circumferentially extending limiting groove is further formed in the bottom of the race, and a limiting block capable of being matched with the limiting groove is arranged on one surface of the buffer tooth opposite to the bottom of the race.

6. The shift joint assembly of claim 5, wherein the two limit grooves are arranged in a central symmetry.

7. The shift joint assembly of claim 1, wherein the second resilient cushion member is a wave spring received in the race and exerting an axial cushion force on the cushion tooth.

8. The shifting coupling assembly of claim 1, further comprising a collar positioned between the range gear and the cushion teeth, the collar being partially received in a collar slot of the gear shaft.

9. A shifting coupling device, characterized in that the shifting coupling device comprises: a slip engaging gear and a shift engaging assembly according to any one of claims 1 to 8;

10. The gearshift coupling according to claim 9, wherein the gear teeth of the gear gears and the sliding engagement gears are rectangular tooth teeth or one-way engagement tooth teeth, and the gear teeth of the gear gears and the sliding engagement gears are barbed tooth surfaces or flat tooth surfaces.