CN218913672U - Buffer device for gear shifting mechanism of new energy automobile - Google Patents

Abstract

The utility model discloses a buffer device of a gear shifting mechanism of a new energy automobile, which comprises a gear shifting motor, a gear shifting hub, a sliding block, a gear shifting shaft, a shifting fork, left combining teeth and right combining teeth, wherein the gear shifting motor is connected with a speed reducer, the speed reducer is connected with the gear shifting hub, the gear shifting motor drives the gear shifting hub to rotate, the sliding block is arranged in a track of the gear shifting hub, the sliding block is fixedly connected with the gear shifting shaft, the shifting fork is arranged on the gear shifting shaft, and the shifting fork moves left and right to drive a toothed sleeve to be connected with the left combining teeth and the right combining teeth. The buffer device comprises a spring, a cover plate and a limiting pin, wherein a sleeve of the shifting fork is sleeved on the shifting shaft, the limiting pin is inserted into the sleeve and the shifting shaft, a through hole is formed in the sleeve, and the spring is arranged in the through hole; one end of the spring is contacted with the limiting pin, and the other end of the spring is preloaded by the cover plate and is in a contracted state; the cover plate is detachably arranged on the end face of the sleeve. The utility model has simple structure and easy installation. The large impact force generated between the combined teeth and the tooth sleeve can be counteracted, the gear shifting time is shortened, and the efficiency is improved.

Description

Buffer device for gear shifting mechanism of new energy automobile

Technical Field

The utility model belongs to the field of automobile gear shifting mechanisms, and particularly relates to a buffer device of a gear shifting mechanism of a new energy automobile.

Background

The automobile gear shifting mechanism is mainly realized through a synchronizer, and a synchronizing ring is mostly installed inside the synchronizer. The rotation speeds of the input end and the output end are similar through the friction action of the synchronous ring, so that gear shifting action is performed, and large impact cannot be generated in the gear shifting process. At present, new energy automobiles are popular, and the input end of a synchronizer in a multi-gear gearbox of most new energy automobiles is directly realized through speed regulation of a high-precision driving motor, so that gear shifting actions can be completed without a synchronizing ring. However, because of no friction effect speed regulation, the impact force between the tooth sleeve and the combined tooth is larger, and the service life of the gear shifting mechanism is seriously influenced.

Disclosure of Invention

Aiming at the defects existing in the prior art, the utility model aims to solve the problems that the existing new energy automobile directly uses a driving motor to regulate speed and the impact force between a tooth sleeve and a combined tooth is overlarge.

In order to achieve the aim, the utility model provides a buffer device of a gear shifting mechanism of a new energy automobile, the gear shifting mechanism comprises a gear shifting motor, a gear shifting hub, a sliding block, a shifting shaft, a shifting fork, a left combining tooth and a right combining tooth, wherein the gear shifting motor is connected with a speed reducer, the speed reducer is connected with the gear shifting hub, the gear shifting motor drives the gear shifting hub to rotate, the sliding block is arranged in a track of the gear shifting hub, the sliding block is fixedly connected with the shifting shaft, the shifting fork is arranged on the shifting shaft, the shifting fork moves left and right to drive a tooth sleeve to be connected with the left combining tooth and the right combining tooth,

the buffer device comprises a spring, a cover plate and a limiting pin, wherein a sleeve of the shifting fork is sleeved on the shifting shaft, the limiting pin is inserted into the sleeve and the shifting shaft, a through hole is formed in the sleeve, and the spring is arranged in the through hole; one end of the spring is contacted with the limiting pin, and the other end of the spring is preloaded by the cover plate and is in a contracted state; the cover plate is detachably arranged on the end face of the sleeve.

According to a further embodiment of the present utility model or the cushioning device according to any of the preceding embodiments, the spring and the through hole are two, and the through hole is disposed symmetrically up and down in the sleeve.

According to still another embodiment of the present utility model or the buffer device according to any one of the preceding embodiments, a counter bore is provided at a position where the cover plate and the limiting pin contact the spring, so as to facilitate installation of the spring.

According to still another embodiment of the present utility model or the cushioning device according to any one of the preceding embodiments, the cushioning device further includes a fastening bolt, the sleeve end face is provided with a plurality of evenly arranged threaded holes, the cover plate is mounted on the sleeve through the plurality of fastening bolts, and the cover plate compresses the spring.

According to a further embodiment of the present utility model or the buffering device according to any one of the preceding embodiments, four fastening bolts and four threaded holes are provided, and are symmetrically arranged up and down.

The utility model has the beneficial effects that:

the buffer device for the gear shifting mechanism of the new energy automobile has the advantages of simple structure and easy installation. The spring for buffering is arranged at the shifting fork part, so that huge impact force generated between the combination teeth and the tooth sleeve during gear shifting is counteracted, the gear shifting time is shortened, and the efficiency is improved.

Drawings

Fig. 1 is a schematic perspective view of a gear shifting mechanism of a new energy automobile according to the utility model;

FIG. 2 is a schematic cross-sectional view of a new energy automobile gear shifting mechanism buffer device according to the present utility model;

FIG. 3 is an enlarged schematic view of portion A of FIG. 2;

fig. 4 is an assembly schematic diagram of the gear shifting mechanism buffer device of the new energy automobile;

fig. 5 is an enlarged schematic view of portion B of fig. 4.

In the figure: 1. a shift motor; 2. a shift hub; 3. a slide block; 4. a poking shaft; 5. a left coupling tooth; 6. a shifting fork; 601. a fastening bolt; 602. a cover plate; 603. a spring; 604. a limiting pin; 605. a sleeve; 606. a threaded hole; 607. a through hole; 7. a tooth sleeve; 8. and right engaging teeth.

Detailed Description

The present utility model will now be described more fully hereinafter with reference to the accompanying drawings, in which illustrative embodiments of the utility model are shown. This utility model may, however, be embodied in different forms and should not be construed as limited to the embodiments set forth herein. The above-described embodiments are presented in order to provide a thorough and complete disclosure of the present utility model, and to provide a more complete and accurate understanding of the scope of the present utility model. Terms such as "comprising" and "including" mean that, in addition to having elements that are directly and explicitly recited in the description and claims, the inventive solution does not exclude the presence of other elements not directly or explicitly recited.

In the drawings of the specification, fig. 1 is a perspective view of the whole gear shifting mechanism of the new energy automobile, fig. 2 is a cross-sectional view of a buffer device, fig. 3 is an enlarged detailed view of the buffer device, and fig. 4 is an assembly schematic of the buffer device; fig. 4 is an enlarged schematic view showing an assembled state of the buffer device.

As shown in fig. 1, the new energy automobile gearshift includes gear shifting motor 1, gear shifting hub 2, slider 3, dial shaft 4, shift fork 6, left combination tooth 5, right combination tooth 8, gear shifting motor 1 connects the reduction gear, and the reduction gear is connected gear shifting hub 2, and gear shifting motor 1 drives gear shifting hub 2 rotation, installs slider 3 in the track of gear shifting hub 2, slider 3 and dial shaft 4 fixed connection, installs shift fork 6 on the dial shaft 4, shift fork 6 moves about, drives tooth cover 7 and is connected with left combination tooth 5, right combination tooth 8.

As shown in fig. 2 and 3, the buffer device comprises a spring 603, a cover plate 602 and a limiting pin 604, wherein a sleeve 605 of a shifting fork 6 is sleeved on a shifting shaft 4, the limiting pin 604 is inserted into the sleeve 605 and the shifting shaft 4, a through hole 607 is formed in the sleeve 605, and the spring 603 is mounted in the through hole 607. As shown in fig. 4 and 5, there are two springs 603 and through holes 607, and the through holes 607 are vertically symmetrically arranged in the sleeve 605. One end of the spring 603 is contacted with the limiting pin 604, and the other end is preloaded by the cover plate 602 and is in a contracted state; the cover plate 602 is detachably mounted on the end face of the sleeve 605. And counter bores are formed in the positions, in contact with the springs 603, of the cover plate 602 and the limiting pins 604, so that the springs 603 are convenient to install. The sleeve 605 terminal surface is provided with a plurality of screw holes 606 that evenly arrange, and apron 602 passes through a plurality of fastening bolt 601 and installs on sleeve 605, and fastening bolt 601 and screw hole 606 have four, and upper and lower bilateral symmetry sets up, apron 602 compression spring 603.

The working principle of the utility model is as follows:

the new energy automobile gearshift includes gear shifting motor 1, gear shifting hub 2, slider 3, dial shaft 4, shift fork 6, left combination tooth 5, tooth cover 7, right combination tooth 8. When the vehicle machine needs to execute a gear shifting action, the gear shifting motor 1 drives the speed reducer and the gear shifting hub 2 to start rotating, the sliding block 3 drives the shifting shaft 4 to axially move along a track on the gear shifting hub 2, so that the shifting fork 6 drives the gear sleeve 7 to move left and right, and the gear shifting is completed by combining with the left combining teeth 5 or the right combining teeth 8. Because the synchronizer is not internally provided with the synchronizing ring, the rotating speeds of the input end and the output end cannot be close by the friction action of the synchronizing ring, and the tooth sleeve 7 and the combined teeth are in direct tooth-to-tooth contact, so that larger impact force can be generated, and the structure is irreversibly influenced. As shown in fig. 2 and 3, the utility model adds a buffer device in the shifting fork 6, thereby counteracting the impact force and protecting the structure.

As shown in fig. 5, the buffer device in the fork 6 comprises a fastening bolt 601, a cover plate 602, a spring 603 and a limiting pin 604, wherein the limiting pin 604 enables the spring 603 to be stressed uniformly. Importantly, when the shifting fork 6 advances left and right, in order to avoid the force transmission loss caused by the buffer device, the tooth sleeve 7, the left combining tooth 5 and the right combining tooth 8 cannot be combined within a specified time, and the situation of power hysteresis and interruption is generated, the spring 603 needs to be kept with a pretightening force, and the pretightening force is in the range of: (a.f1, b.f2);

wherein a and b are safety coefficients, F1 is a gear shifting force, and F2 is an impact force. Typically, a shift force maximum of 1400N is satisfied. Impact force is related to vehicle speed, gear shifting strategy and gear.

Taking a gear shift of a synchronizer of a gearbox of a new energy automobile as an example, the gear impact is about 6100N. The safety coefficient is 0.8-1.2. Therefore, the pre-tightening force of the spring 603 is greater than the gear shifting force, the spring 603 is not deformed when the gear shifting action is executed, so that the action of the shifting fork 6 and the combination of the tooth sleeve 7 and the combining teeth are not affected, when the tooth sleeve 7 is contacted with the combining teeth to generate impact, the impact force is greater than the pre-tightening force of the spring 603, and therefore the spring 603 can be elastically deformed to offset the huge impact force, however, the pre-tightening force of the spring 603 and the spring 603 force generated by the generated elastic deformation can be applied to the shifting fork 6 together, and the shifting fork 6 is caused to drive the tooth sleeve 7 to be combined with the combining teeth as soon as possible. Therefore, the utility model not only counteracts the impact force generated in the gear shifting process, but also promotes the gear shifting process and shortens the gear shifting time.

The foregoing has outlined the basic principles, features and advantages of the present utility model. It should be understood by those skilled in the art that the foregoing embodiments are merely illustrative of the technical concept and features of the present utility model, and the present utility model can be implemented by those skilled in the art without limiting the scope of the utility model, therefore, all equivalent changes or modifications that are made according to the spirit of the present utility model should be included in the scope of the present utility model.

Claims (5)

1. The utility model provides a new energy automobile gearshift buffer, gearshift includes gear shifting motor (1), gear shifting hub (2), slider (3), dial shaft (4), shift fork (6), left combination tooth (5), right combination tooth (8), gear shifting motor (1) connect the reduction gear, gear shifting hub (2) are connected to the reduction gear, gear shifting motor (1) drive gear shifting hub (2) rotate, slider (3) are installed in the track of gear shifting hub (2), slider (3) and dial shaft (4) fixed connection, install shift fork (6) on dial shaft (4), shift fork (6) are moved about, drive tooth cover (7) are connected with left combination tooth (5), right combination tooth (8),

the method is characterized in that: the buffer device comprises a spring (603), a cover plate (602) and a limiting pin (604), wherein a sleeve (605) of the shifting fork (6) is sleeved on the shifting shaft (4), the limiting pin (604) is inserted into the sleeve (605) and the shifting shaft (4), a through hole (607) is formed in the sleeve (605), and the spring (603) is arranged in the through hole (607); one end of the spring (603) is contacted with the limiting pin (604), and the other end of the spring is preloaded by the cover plate (602) and is in a contracted state; the cover plate (602) is detachably arranged on the end face of the sleeve (605).

2. The new energy automobile gearshift buffering device according to claim 1, wherein: the number of the springs (603) and the number of the through holes (607) are two, and the through holes (607) are symmetrically arranged in the sleeve (605) up and down.

3. The new energy automobile gearshift buffering device according to claim 1, wherein: and counter bores are formed in the positions, in contact with the springs (603), of the cover plate (602) and the limiting pin (604), so that the springs (603) can be conveniently installed.

4. The new energy automobile gearshift buffering device according to claim 1, wherein: the novel socket further comprises a fastening bolt (601), a plurality of threaded holes (606) which are uniformly distributed are formed in the end face of the socket (605), the cover plate (602) is mounted on the socket (605) through the fastening bolts (601), and the cover plate (602) compresses the spring (603).

5. The buffer device for the gear shifting mechanism of the new energy automobile according to claim 4, wherein: the fastening bolts (601) and the threaded holes (606) are arranged in four ways and are symmetrically arranged in the upper-lower left-right direction.

Images