CN216111831U

CN216111831U - Matching structure of tooth seat and tooth sleeve of synchronizer

Info

Publication number: CN216111831U
Application number: CN202120835628.9U
Authority: CN
Inventors: 王怀彬; 刘明; 骆泽君; 裴丽敏; 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: 2022-03-22
Anticipated expiration: 2031-04-22

Abstract

The utility model discloses a matching structure of a tooth holder and a tooth sleeve of a synchronizer, wherein an internal spline comprises a tooth holder meshing spline group and a push block meshing spline group, the tooth holder meshing spline group and the push block meshing spline group are both multiple groups, each tooth holder meshing spline group comprises a first internal spline, a second internal spline and a third internal spline, each group of external splines comprises a first spline groove, a second spline groove and a third spline groove, the depth of the first spline groove is respectively greater than that of the second spline groove and that of the third spline groove, the first internal spline is matched with the first spline groove, the second internal spline is matched with the second spline groove, and the third internal spline is matched with the third spline groove; the first internal spline comprises a first key and a second key, the root of the first key is combined with the inner circumferential surface of the gear sleeve, the root of the second key is combined with the first key, and the width of the first key is larger than that of the second key. The utility model can limit the position of the gear sleeve in the gear shifting process.

Description

Matching structure of tooth seat and tooth sleeve of synchronizer

Technical Field

The utility model belongs to the technical field of automobile synchronizers, and particularly relates to a matching structure of a tooth holder and a tooth sleeve of a synchronizer.

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 toothholder and the toothholder are two important parts in the synchronizer, the outer peripheral face of the toothholder is provided with an external spline, the inner peripheral face of the toothholder is provided with an internal spline, an external spline groove is formed between two adjacent external splines, an internal spline groove is formed between two adjacent internal splines, the external spline on the toothholder is matched with the internal spline groove, the internal spline on the toothholder is matched with the external spline groove, the toothholder and the toothholder transmit torque on the one hand through the matching of the internal spline and the external spline, and on the other hand, when the shifting fork applies axial acting force along the synchronizer to the toothholder, the toothholder can move along the axial direction of the synchronizer, so that the toothholder is meshed with combined teeth positioned on the side part of the toothholder.

Because the height of the internal spline is consistent among the prior art, in the gear shifting process, when the gear sleeve is driven by the shifting fork to move along the axial direction, the gear sleeve cannot be limited, and a driver cannot control the gear shifting stroke.

SUMMERY OF THE UTILITY MODEL

The utility model provides a matching structure of a tooth holder and a tooth sleeve of a synchronizer, which can limit the position of the tooth sleeve in the gear shifting process.

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

the matching structure of the tooth holder and the tooth holder of the synchronizer comprises the tooth holder and the tooth holder, wherein an inner spline is arranged on the inner circumferential surface of the tooth holder, a plurality of groups of outer key grooves are arranged on the outer circumferential surface of the tooth holder, the inner spline comprises a tooth holder meshing spline group and a push block meshing spline group, the tooth holder meshing spline group and the push block meshing spline group are both in a plurality of groups, each tooth holder meshing spline group comprises a first inner spline, a second inner spline and a third inner spline, each group of outer key grooves comprises a first key groove, a second key groove and a third key groove, the depth of the first key groove is respectively greater than that of the second key groove and the third key groove, the first inner spline is matched with the first key groove, the second inner spline is matched with the second key groove, and the third inner spline is matched with the third key groove;

the first internal spline comprises a first key and a second key, the root of the first key is combined with the inner circumferential surface of the gear sleeve, the root of the second key is combined with the first key, and the width of the first key is larger than that of the second key.

After the scheme is adopted, a step surface is formed between the first key and the second key, in the gear shifting process, when the gear sleeve moves along the axial direction through the shifting fork, the second key on the gear sleeve and the axial end surface of the combined tooth form abutting, so that the gear sleeve is prevented from moving, namely the second key is arranged to limit the gear sleeve in the gear shifting process, when the gear is shifted in place, the gear sleeve stops and cannot move forwards any more, the position of the gear sleeve is limited, and the gear sleeve cannot move forwards without limitation, so that a driver can timely control whether the gear shifting is in place.

Drawings

FIG. 1 is a schematic view of a mating structure of a carrier and a sleeve of a synchronizer;

FIG. 2 is a perspective view of the gear sleeve;

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

FIG. 4 is a schematic view of a tooth holder;

reference numbers in the drawings:

the tooth sleeve 10, a push block meshing spline group 11, a groove 11a, a first internal spline 12, a first tooth profile surface 12a, a first guide part 12c, a first key 12d, a second key 12e, a second internal spline 13, a second tooth profile surface 13a, a third internal spline 14, a third tooth profile surface 14a, a second guide part 14c, a first tooth groove 15 and a second tooth groove 16;

a tooth holder 20, a second mounting groove 21, a first key groove 22, a second key groove 23 and a third key groove 24;

a push block 30.

Detailed Description

Referring to fig. 1 to 4, the engagement structure of the carrier and the sleeve of the synchronizer of the present invention, including the sleeve 10 and the carrier 20, will be described in detail below for each of the parts and their relationship:

the inner peripheral surface of the gear sleeve 10 is provided with an internal spline, the internal spline comprises a gear seat meshing spline group and a pushing block meshing spline group 11, the gear seat meshing spline group and the pushing block meshing spline group 11 are respectively provided with a plurality of groups, in the embodiment, each group of pushing block meshing spline group 11 consists of three splines, each spline is provided with a groove 11a, one groove 11a is matched with a steel ball installed in the pushing block 30, when the gear sleeve 10 moves along the axial direction of the synchronizer, the axial acting force of the gear sleeve 10 is transmitted to the steel ball, and therefore the pushing block 30 moves along the axial direction of the synchronizer through the steel ball.

Each set of the tooth socket meshing spline set includes a first internal spline 12, a second internal spline 13, and a third internal spline 14, the thicknesses of the first internal spline 12, the second internal spline 13, and the third internal spline 14 are different, in this embodiment, preferably, the thickness D1 of the first internal spline 12 is smaller than the thickness D3 of the third internal spline 14, and the thickness D2 of the second internal spline 13 is smaller than the thickness D1 of the first internal spline 12, so that the width of the first tooth groove 15 between the second internal spline 13 and the adjacent first internal spline 12 is greater than the width of the second tooth groove 16 between the first internal spline 12 and the third internal spline 14.

Due to the fact that the thickness of the second internal spline 13 is reduced, and the width of the first tooth groove 15 is increased, when the gear sleeve 10 penetrates through a lock ring (not shown in the figure), clamping stagnation of the second profile surface 13a and the profile surface on the lock ring is avoided, meanwhile, a fine adjustment space is provided when the first internal spline 12 and the third internal spline 14 are matched with the lock ring, clamping stagnation of the first internal spline 12 and the third internal spline 14 and the profile surface on the lock ring is further avoided, and therefore gear shifting comfort is improved. In addition, during the process of machining the gear sleeve 10, the second profile surface 13a of the second internal spline 13 is not milled, so that a concave-convex structure is not formed on the second profile surface 13a, and the concave-convex structure is prevented from colliding with the tooth profile surface on the lock ring.

The thickness of both ends of the first internal spline 12 is narrower than the thickness of the middle portion of the first internal spline 12, so that both end portions of the first internal spline 12 are respectively formed with first guide portions 12c, the thickness of both ends of the third internal spline 14 is narrower than the thickness of the middle portion of the third internal spline 14, so that both end portions of the third internal spline 14 are respectively formed with second guide portions 14c, so that, when the first internal spline 12 is engaged with the tooth groove on the lock ring, the first guide portion 12c is engaged with the tooth groove on the lock ring, and when the third internal spline 14 is engaged with the tooth groove on the lock ring, the second guide portion 14c is engaged with the tooth groove on the lock ring, since the thicknesses of the first guide portion 12c and the second guide portion 14c are small, the first internal spline 12 and the third internal spline 14 can be smoothly guided into and pass through the tooth groove on the lock ring, thereby preventing the first tooth profile surface 12a of the first internal spline 12 from being stuck with the lock ring, and the third tooth profile surface 14a of the third internal spline 14 is stuck with the lock ring, so that the gear shifting comfort is further improved.

In this embodiment, there are two first internal splines 12 in each set of the toothholder engagement spline set, wherein the second internal spline 13 is located between the two first internal splines 12, and the third internal spline 14 is located outside the first internal splines 12.

Be equipped with the first mounting groove of a plurality of installation pushers 30 and the second mounting groove 21 of installation synchronizer ring claw portion (not shown in the figure) on toothholder 20, be equipped with the outer keyway of multiunit on toothholder 20's the outer peripheral face, every outer keyway of group includes first keyway 22, second keyway 23 and third keyway 24, the degree of depth of first keyway 22 is greater than the degree of depth of second keyway 23 and third keyway 24 respectively, first internal spline 12 and the cooperation of first keyway 22, second internal spline 13 and the cooperation of second keyway 23, third internal spline 14 and the cooperation of third keyway 24.

In this embodiment, the height H1 of the first internal spline 12 is greater than the height H2 of the second internal spline 13 and the height H3 of the third internal spline 14. The first internal spline 12 comprises a first key 12d and a second key 12e, the root of the first key 12d is combined with the inner circumferential surface of the gear sleeve 10, the root of the second key 12e is combined with the first key 12d, through the structure, a step surface is formed between the first key 12d and the second key 12e, when the gear sleeve 10 moves along the axial direction through a shifting fork in the gear shifting process, the second key 12e on the gear sleeve 10 is abutted against the axial end surface of the combined tooth, so that the gear sleeve 10 is prevented from moving, namely, the second key 12d is arranged to enable the gear sleeve 10 to obtain a limiting effect in the gear shifting process, when the gear shifting is in place, the gear sleeve 10 is stopped and can not move forwards any more, and therefore, the position of the gear sleeve 10 can not be limited and can not move forwards without limitation.

The width L1 of the first key 12d is greater than the width L2 of the second key 12e, the width L2 of the second key 12e is 60% to 70% of the width L1 of the first key 12d, and the width L2 of the second key 12e is preferably 62.5% of the width L1 of the first key 12 d.

In each set of outer key slots, the number of first key slots 22 is two, the number of second key slots 23 is one, and the number of third key slots 24 is three, wherein the second key slots 23 are located between two first key slots 22, and the third key slots 24 are located outside the first key slots 22. In the present embodiment, the widths of the mouths of the first key groove 22, the second key groove 23 and the third key groove 24 are all equal.

Claims

1. The matching structure of the tooth holder and the tooth holder of the synchronizer comprises the tooth holder (10) and the tooth holder (20), wherein an inner spline is arranged on the inner circumferential surface of the tooth holder (10), a plurality of groups of outer key grooves are arranged on the outer circumferential surface of the tooth holder (20), the inner spline comprises a tooth holder meshing spline group and a push block meshing spline group (11), and the tooth holder meshing spline group and the push block meshing spline group (11) are both in a plurality of groups, and the matching structure is characterized in that each group of tooth holder meshing spline group comprises a first inner spline (12), a second inner spline (13) and a third inner spline (14), each group of outer key grooves comprises a first key groove (22), a second key groove (23) and a third key groove (24), the depth of the first key groove (22) is respectively greater than the depths of the second key groove (23) and the third key groove (24), the first inner spline (12) is matched with the first key groove (22), and the second inner spline (13) is matched with the second key groove (23), the third internal spline (14) is matched with the third key groove (24);

the first internal spline (12) comprises a first key (12 d) and a second key (12 e), the root of the first key (12 d) is combined with the inner circumferential surface of the gear sleeve (10), the root of the second key (12 e) is combined with the first key (12 d), and the width of the first key (12 d) is larger than that of the second key (12 e).

2. The engagement structure of a carrier and a sleeve of a synchronizer according to claim 1, wherein a root of the second key (12 e) is bonded to a top surface of the first key (12 d).

3. The engagement structure of a carrier and a sleeve of a synchronizer according to claim 2, wherein the width of the second key (12 e) is 60 to 70% of the width of the first key (12 d).