CN113483033A

CN113483033A - Unilateral synchronizer

Info

Publication number: CN113483033A
Application number: CN202110719225.2A
Authority: CN
Inventors: 杨昭坤; 郑新
Original assignee: Chongqing Changan Automobile Co Ltd
Current assignee: Chongqing Changan Automobile Co Ltd
Priority date: 2021-06-28
Filing date: 2021-06-28
Publication date: 2021-10-08
Anticipated expiration: 2041-06-28
Also published as: CN113483033B

Abstract

The invention relates to a single-side synchronizer. The sliding block structure comprises a gear hub and a sliding block arranged in a sliding block groove of the gear hub, wherein the gear hub is provided with a left end face, a right end face and an inner arc face, a limiting clamping block is clamped in the sliding block groove and integrally formed by plastic, and one end of the sliding block groove is closed by the limiting clamping block. The invention has simple structure and low cost of the limit of the sliding block of the synchronizer on the premise of ensuring the reliable limit of the sliding block of the synchronizer.

Description

Unilateral synchronizer

Technical Field

The invention relates to a synchronizer in a transmission, in particular to a single-side synchronizer.

Background

The synchronizer is an important execution component for realizing gear switching in the automobile transmission, one synchronizer is provided with a left side and a right side, can respectively execute one gear, can execute two gears, and the unilateral synchronizer is only used on one side and is only responsible for executing one gear. The application of unilateral synchronous ware is also comparatively extensive, including tooth hub and the slider of installing in tooth hub slider inslot, the tooth hub has left end face, right-hand member face and interior arc surface, and the spacing reliability of the slider on the unilateral synchronous ware among the prior art is relatively poor, has the risk that the slider is deviate from.

ZL2016202841364 discloses a unilateral synchronous ware, including the tooth hub, cup joint the tooth cover on the tooth hub, be equipped with the slider groove on the tooth hub outer wall, slider inslot connects the slider, has all seted up the spacing groove on the slider groove both sides wall, all is equipped with the stopper on the lateral wall that the spacing groove is close to the outside, and the stopper is close to tooth hub front end face setting, and slider front end butt is on the stopper, and the slider both sides set up at the spacing inslot. The unilateral synchronizer sliding block limiting structure has good reliability, avoids the risk of sliding off the sliding block, is safe and reliable to use, but has complex machining process and high machining cost due to the complex shape of the sliding block groove on the gear hub.

Disclosure of Invention

The invention aims to provide a unilateral synchronizer, which has a simple slide block limiting structure and low cost on the premise of ensuring the reliable limit of a slide block of the synchronizer.

The unilateral synchronizer comprises a gear hub and a sliding block arranged in a sliding block groove of the gear hub, wherein the gear hub is provided with a left end face, a right end face and an inner arc face, a limiting clamping block is clamped in the sliding block groove and is integrally formed by plastic, and one end of the sliding block groove is closed.

The two sides of the sliding block groove are in a symmetrical two-stage step shape, and the distance between the upper stage steps is larger than the distance between the lower stage steps; the limiting clamping block consists of a limiting block and two clamping pins perpendicular to the limiting block, the upper side surface of the limiting block is a cambered surface with the radian consistent with that of the inner cambered surface of the gear hub, the limiting block extends upwards in the middle of the upper side surface to form a stop block, and the outer ends of the clamping pins are provided with outward clamping hooks; the limiting clamping block is clamped on the upper step through the clamping pins, the clamping hook of the limiting clamping block is hooked on the left end face of the gear hub, the upper side face of the limiting block is abutted against the inner arc face of the gear hub, the inner end face of the limiting block is abutted against the right end face of the gear hub, and the sliding block is located between the two clamping pins in the sliding block groove.

The inner side surfaces of the two clamping feet are flush with the side surface of the lower step, and the sliding block is in sliding fit with the two clamping feet and the lower step.

According to the invention, the limiting fixture block is arranged in the slider groove of the gear hub in a clamping manner, two sides of the slider groove of the gear hub are in a symmetrical two-stage step shape, the shape is simple, the processing is very convenient, the limiting fixture block is a plastic injection molding part, the cost is low, the clamping and mounting are convenient and rapid, and therefore, the slider limiting structure of the unilateral synchronizer is simple, and the cost is low.

After the limiting clamping block is clamped in the gear hub sliding block groove, two clamping feet of the limiting clamping block are limited between the upper first-stage steps, so that the limiting clamping block loses the degree of freedom in the tangential direction (horizontal direction); the upper side surface of the limiting block is abutted against the inner arc surface of the gear hub, and the two clamping pins are abutted against the end surface of the lower step, so that the limiting clamping block loses the radial degree of freedom; the inner end face of the limiting block is abutted against the right end face of the gear hub, the clamping hooks of the two clamping feet are hooked on the upper first-level step of the left end face of the gear hub, the limiting block loses axial freedom, one end of the sliding block groove is sealed by the limiting block and the limiting block of the limiting block, and therefore the limiting block can be reliably fixed in the sliding block groove to reliably limit the sliding block.

Drawings

Fig. 1 and 2 are isometric views of the single-side synchronizer of the invention.

Fig. 3 is an axonometric view of the limiting fixture block.

Fig. 4 is an exploded view of the single-sided synchronizer of the present invention.

FIG. 5 is an isometric view of a limiting clamping block clamped in a sliding block slot.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings.

As shown in fig. 1 and 2, the unilateral synchronizer comprises a gear hub 1 and a slider 3 installed in a slider groove 5 of the gear hub 1, wherein the gear hub 1 has a left end face 7, a right end face 2 and an inner arc face 6, a limiting block 4 is connected in the slider groove 5 in a clamping manner to seal one end of the slider groove 5, as shown in fig. 3, the limiting block 4 is integrally formed by plastic and comprises a limiting block 44 and two clamping feet 45 perpendicular to the limiting block 44, an upper side face 41 of the limiting block 44 is an arc face with the radian consistent with that of the inner arc face 6 of the gear hub 1, the limiting block 44 extends upwards in the middle of the upper side face 41 to form a stop 42, the cross section of the clamping feet 45 is rectangular, and an outward clamping hook 46 is arranged at the outer end of the limiting block 44. As shown in fig. 4 and 5, both sides of the slider groove 5 are symmetrically two-step-shaped, and the distance between the upper step 9 is greater than the distance between the lower step 8, so that the slider groove 5 is formed into a shape with a wide top and a narrow bottom. The limiting clamping block 4 is clamped on the upper step 9 through clamping feet 45, the clamping hook 46 is hooked at the upper step 9 of the left end face 7 of the gear hub, the two clamping feet 45 are respectively contacted with the side face of the upper step 9 and the end face of the lower step 8, and the inner side faces of the two clamping feet 45 are flush with the side face of the lower step 8. The upper side surface 41 of the limiting block 44 is abutted against the inner arc surface 6 of the gear hub, the inner end surface 47 of the limiting block 44 is abutted against the right end surface 2 of the gear hub 1, and the sliding block 3 is positioned between the two clamping pins 45 and the lower step 8 in the sliding block groove 5 and is in sliding fit with the two clamping pins 45 and the lower step 8.

Claims

1. The utility model provides a unilateral synchronous ware, includes tooth hub (1) and installs slider (3) in tooth hub slider groove (5), and the tooth hub has left end face (7), right-hand member face (2) and interior cambered surface (6), its characterized in that: and a limiting clamping block (4) is clamped in the sliding block groove and is integrally formed by plastic, and one end of the sliding block groove is sealed.

2. The single-sided synchronizer of claim 1, wherein: the two sides of the sliding block groove (5) are in a symmetrical two-stage step shape, and the distance between the upper one-stage steps (9) is larger than the distance between the lower one-stage steps (8); the limiting clamping block (4) consists of a limiting block (44) and two clamping feet (45) perpendicular to the limiting block, the upper side surface (41) of the limiting block is an arc surface with the radian consistent with that of the inner arc surface (6) of the gear hub (1), the middle part of the upper side surface of the limiting block extends upwards to form a stop block (42), and the outer ends of the clamping feet are provided with outward clamping hooks (46); the limiting clamping block is clamped on the upper step through the clamping feet, the clamping hook of the limiting clamping block is hooked on the left end face (7) of the gear hub, the upper side face (41) of the limiting block is abutted against the inner arc face (6) of the gear hub, the inner end face (47) of the limiting block is abutted against the right end face (2) of the gear hub, and the sliding block (3) is located between the two clamping feet in the sliding block groove.

3. The single-sided synchronizer of claim 2, wherein: the inner side surfaces of the two clamping feet (45) are flush with the side surface of the lower step (8), and the sliding block (3) is in sliding fit with the two clamping feet and the lower step.