CN215214447U

CN215214447U - Synchronizer of automatic gearbox

Info

Publication number: CN215214447U
Application number: CN202120834156.5U
Authority: CN
Inventors: 刘明; 濮柯; 王怀彬; 陈强; 王中云
Original assignee: Hoerbiger Drive Technology Changzhou Co ltd
Current assignee: Hoerbiger Drive Technology Changzhou Co ltd
Priority date: 2021-04-22
Filing date: 2021-04-22
Publication date: 2021-12-17
Anticipated expiration: 2031-04-22

Abstract

The utility model discloses an automatic gearbox's synchronizer, including the toothholder, the ejector pad, the synchronizing ring, combine the tooth, the toothholder cover is on the toothholder, the toothholder passes through spline fit with the toothholder, ejector pad and toothholder cooperation, synchronizing ring and toothholder cooperation, the synchronizing ring is located the toothholder outside, it is located the synchronizing ring outside to combine the tooth, the spline on the toothholder inner peripheral surface includes a plurality of first spline groups and a plurality of second spline group, the first spline group of every group comprises a plurality of first splines, every group second spline group comprises a plurality of second splines, first spline group and second spline group arrange along the circumference of toothholder in turn, be equipped with a plurality of second spline groups and synchronizing ring can not form the engaged space of stepping down when synchronous on synchronizing ring global. The utility model discloses can promote the travelling comfort at the in-process of shifting.

Description

Synchronizer of automatic gearbox

Technical Field

The utility model discloses car synchronizer technical field, concretely relates to automatic transmission's synchronous ware.

Background

Synchronizers are one of the key components in transmissions, particularly automotive transmissions, and the performance of a synchronizer directly determines the shifting performance of the transmission.

The existing synchronizer is generally composed of a tooth holder, a tooth sleeve, a push block, a synchronizing ring and a combination tooth, wherein the tooth sleeve is sleeved on the tooth holder and is matched with the tooth holder through a spline, a first assembly groove and a second assembly groove are formed in the circumferential surface of the tooth holder, the number of the first assembly groove and the number of the second assembly groove are respectively three and are arranged in an alternating state, the push block is matched in the first assembly groove, a claw part extending along the axial direction is arranged on the synchronizing ring and is matched in the second assembly groove, the synchronizing ring is positioned outside the tooth holder, and the combination tooth is positioned outside the synchronizing ring.

In the synchronizer having the above-described structure, the lengths of the plurality of splines on the inner peripheral surface of the sleeve are generally equal, and the chamfer of the end portion of the spline on the inner wall of the sleeve is generally set to be small in order to reduce the shifting force, however, the reduction of the chamfer may cause the spline to have insufficient safety when synchronizing with the synchronizer ring, that is, noise may be generated due to an excessive collision force between the spline and the tooth surface of the synchronizer ring, which may not only affect the shifting comfort, but also may damage the synchronizer in a serious case, and therefore, it is necessary to improve the synchronizer.

SUMMERY OF THE UTILITY MODEL

The utility model provides an automatic gearbox's synchronizer, the utility model discloses can promote the travelling comfort at the in-process of shifting.

The technical scheme for solving the technical problems is as follows:

automatic gearbox's synchronizer, including the toothholder, the ejector pad, the synchronizer ring, combine the tooth, the toothholder cover is on the toothholder, the toothholder passes through spline fit with the toothholder, ejector pad and toothholder cooperation, synchronizer ring and toothholder cooperation, the synchronizer ring is located the toothholder outside, it is located the synchronizer ring outside to combine the tooth, the spline on the toothholder inner peripheral surface includes a plurality of first spline groups and a plurality of second spline group, the first spline group of every group comprises a plurality of first splines, every group second spline group comprises a plurality of second splines, first spline group and second spline group arrange along the circumference of toothholder in turn, be equipped with a plurality of second spline groups and synchronizer ring can not form the space of stepping down of meshing when synchronous on the global of synchronizer ring.

Adopt above-mentioned scheme, when the tooth cover with the synchronizing ring in-process in step, first spline and synchronizing ring cooperation or meshing, and the second spline then with the space cooperation of stepping down, consequently, the second spline is only through the space of stepping down purely, can not take place the transmission of collision and moment of torsion with the synchronizing ring to the collision that second spline and synchronizing ring took place has been reduced, thereby when improving factor of safety, the noise that the production of shifting has been reduced or eliminated, the travelling comfort of shifting has been promoted.

Drawings

FIG. 1 is a schematic illustration of a synchronizer for an automatic transmission;

FIG. 2 is a schematic view of the coupling tooth hidden from view in FIG. 1;

FIG. 3 is a front view of the gear sleeve;

FIG. 4 is a schematic view of a synchronizer ring;

reference numbers in the drawings:

the gear seat 10, the gear sleeve 20, the first spline 21, the first chamfer alpha, the second spline 22, the second chamfer beta, the push block 30, the synchronizing ring 40, the abdicating space 41 and the combined tooth 50.

Detailed Description

As shown in fig. 1 to 4, the utility model discloses an automatic transmission's synchronous ware, including toothholder 10, tooth cover 20, ejector pad 30, synchronizing ring 40, combine tooth 50, toothholder 20 overlaps on toothholder 10, toothholder 20 passes through spline fit with toothholder 10, ejector pad 30 and toothholder 10 cooperation, synchronizing ring 40 is located the toothholder 10 outside, it is located the synchronizing ring 40 outside to combine tooth 50, the spline on the inner peripheral surface of toothholder 20 includes a plurality of first spline groups and a plurality of second spline group, the first spline group of every group comprises a plurality of first splines 21, every group second spline group comprises a plurality of second splines 22, first spline group and second spline group arrange along the circumference of toothholder 20 in turn, be equipped with a plurality of second spline groups and synchronizing ring 40 can not form the space of stepping down 41 of meshing when synchronous on synchronizing ring 40's global. Preferably, the abdicating space 41 is formed on the basis of the synchronizing ring 40 in the prior art, which is equivalent to removing the gear teeth corresponding to the second spline 22 on the synchronizing ring 40 in the prior art, or the portion of the synchronizing ring 40 corresponding to the second spline 22 in the prior art is no longer provided with gear teeth, and is left free to form the abdicating space 41.

As shown in fig. 1 to 4, the utility model discloses in, when tooth cover 20 in with the synchronizing ring 40 synchronization process, first spline 21 and synchronizing ring 40 cooperation or meshing, and second spline 22 then with the cooperation of abdicating space 41, consequently, second spline 22 is only through abdicating space 41 alone, can not collide and the transmission of moment of torsion with synchronizing ring 40, thereby reduced the collision that second spline 22 and synchronizing ring 40 took place, thereby when improving factor of safety, the travelling comfort of shifting has been promoted.

As shown in fig. 3, the end of each first spline 21 has a first chamfer α, and the end of each second spline 22 has a second chamfer β, the angle of the first chamfer α being greater than the angle of the second chamfer β. Because the angle of the first chamfer alpha is larger, the first chamfer alpha is easy to be matched with the synchronizing ring 40 in the synchronizing process with the synchronizing ring 40, and even if the first chamfer alpha and the synchronizing ring 40 collide in the synchronizing process, the contact area of the first chamfer alpha and the synchronizing ring is large, the formed impact force is small, and the safety factor is improved.

As shown in fig. 3, the length of the first spline 21 in the axial direction of the sleeve 20 is smaller than the length of the second spline 22 in the axial direction of the sleeve 20. With this structure, when the second spline 22 is coupled with the coupling tooth 50, since the length of the second spline 22 is greater than that of the first spline 21, the first spline 21 is not coupled with the coupling tooth 50.

As shown in fig. 1 and fig. 3, obviously, the utility model discloses separate first spline 21 and second spline 22 at the function, first spline 21 is used for combining with synchronizer ring 40 promptly, and second spline 22 is used for combining with combination tooth 50, adopts first spline 21 and synchronizer ring 40 combination can promote the factor of safety of shifting, again because the angle of the second chamfer beta of second spline 22 tip is smaller, it is easier to stir combination tooth 50 to can reduce the power of shifting, can improve the travelling comfort of shifting.

In the present embodiment, as shown in fig. 3, it is preferable that the total number of the first splines 21 is equal to the total number of the second splines 22, that is, the first splines 21 and the second splines 22 are half of the number on the gear sleeve 20, so that the gear sleeve 20 can respectively bear the force of the torque without being damaged when the first splines 21 are combined with the synchronizing ring 40 and the second splines 22 are combined with the combining teeth 50.

Claims

1. Synchronizer of automatic transmission, including toothholder (10), toothholder (20), ejector pad (30), synchronizing ring (40), combine tooth (50), toothholder (10) is overlapped in toothholder (20), toothholder (20) passes through spline fit with toothholder (10), ejector pad (30) and toothholder (10) cooperation, synchronizing ring (40) are located the toothholder (10) outside, it is located synchronizing ring (40) outside to combine tooth (50), a serial communication port, the spline on toothholder (20) inner peripheral surface includes a plurality of first spline groups and a plurality of second spline group, every first spline group of group comprises a plurality of first splines (21), every second spline group of group comprises a plurality of second splines (22), first spline group and second spline group arrange along the circumference of toothholder (20) in turn, be equipped with a plurality of second spline group and make second spline group can not form with synchronous ring (40) space meshing when synchronous (41).

2. Synchronizer for automatic gearbox according to claim 1, characterized in that the end of each first spline (21) has a first chamfer (α) and the end of each second spline (22) has a second chamfer (β), the angle of the first chamfer (α) being larger than the angle of the second chamfer (β).

3. Synchronizer for an automatic transmission according to claim 1, characterized in that the length of the first splines (21) in the axial direction of the sleeve (20) is smaller than the length of the second splines (22) in the axial direction of the sleeve (20).

4. Synchronizer for an automatic gearbox according to claim 1, characterized in that the total number of first splines (21) is equal to the total number of second splines (22).