CN203548864U

CN203548864U - Gear locking device

Info

Publication number: CN203548864U
Application number: CN201320724311.3U
Authority: CN
Inventors: 陈志�; 李凤咏; 毛峰; 谢林俐; 杨丽; 王林; 廖传建
Original assignee: SICHUAN CHUANLONG TRACTOR MANUFACTURING Co Ltd
Current assignee: SICHUAN CHUANLONG TRACTOR MANUFACTURING Co Ltd
Priority date: 2013-11-15
Filing date: 2013-11-15
Publication date: 2014-04-16
Anticipated expiration: 2023-11-15

Abstract

The utility model discloses a gear locking device, and belongs to the technical field of machines. The gear locking device comprises a shifting fork body and a shifting fork shaft which penetrates through the shifting fork body and is movably matched with the shifting fork body, clamping grooves are formed in the shifting fork shaft, blind holes are formed in the side, close to the clamping grooves, of the shifting fork body, springs and locking balls arranged on the springs are arranged in the blind holes, at least four clamping grooves are arranged, the number of the blind holes is three, the clamping grooves and the blind holes are all formed in the axial direction of the shifting fork shaft, and two blind holes correspond to two clamping grooves respectively. In the gear locking device, the two blind holes corresponding to the clamping grooves in the shifting fork shaft are formed in the shifting fork body, two locking balls are clamped in the corresponding clamping grooves of the shifting fork shaft under the action of spring force at a neutral position or any gear, the gear locking function is achieved, and the gear locking device is high in reliability, simple in structure and low in manufacturing cost.

Description

A kind of gear locking device

Technical field

The utility model relates to field of mechanical technique, in particular to a kind of gear locking device.

Background technique

The gear locking device of automobile is mainly used in gear self-locking, prevents out of supplyly, and the gear locking device of most of automobiles is the self-locking modes that adopt spring and lock ball, and lock ball is generally steel ball.Wherein tractor with small four wheels is that a sleeve spring and steel ball are set in shift fork body mostly, and during gear shift, shift fork body moves, and steel ball spring-loaded snaps in the draw-in groove of declutch shift shaft, thereby realizes locking, simple in structure.But after using a period of time, will wear and tear, easily cause out of supplyly, the reliability of locking gear level is lower; Also there is the mode adopting with clutch pedal interlock, but need to change the structure of gear box casing and increase linking mechanism, its complex structure, manufacture cost is also higher.

Model utility content

The purpose of this utility model is to provide a kind of gear locking device, and to solve, existing gear locking device is more difficult to be met simple in structurely simultaneously, and reliability is higher again, the problem of lower-cost demand.

The utility model provides a kind of gear locking device, the declutch shift shaft that comprises shift fork body and pass described shift fork body and coordinate with described shift fork body activity, described declutch shift shaft offers draw-in groove, one side of the close described draw-in groove of described shift fork body is provided with blind hole, in described blind hole, be provided with spring and be placed in the lock ball on described spring, described draw-in groove is at least four, described blind hole is three, described draw-in groove and described blind hole are all along the axial setting of described declutch shift shaft, and two described blind holes are corresponding with two described draw-in grooves respectively.

Further, described draw-in groove is circular groove.Circular groove is more conducive to snapping in and skidding off of lock ball, and gear shift is more smooth and easy.

Further, described draw-in groove is four.Can realize switching and the locking of neutral gear and two gears, make it at neutral gear or any gear, all have a lock ball under the effect of spring force, to withstand on fork axle surface, have two lock balls to snap in the respective card slot of declutch shift shaft, be conducive to stress balance, make the switching of gear and locking more stable, reliable.

The beneficial effects of the utility model are, by two blind holes corresponding with draw-in groove on declutch shift shaft are set on shift fork body, in each blind hole, be equipped with spring and be placed in the lock ball on spring, making two lock balls in blind hole snap in the draw-in groove on declutch shift shaft, at neutral gear or any gear, having under the effect of two lock balls at spring force, snap in the respective card slot of declutch shift shaft, play the effect of locking gear, prevent out of supplyly, reliability is higher, and simple in structure, fabricating cost is lower.Gear locking device of the present utility model is preferably applicable to the locking gear level of tractor with small four wheels.

Accompanying drawing explanation

Fig. 1 is that the gear locking device that provides of the utility model embodiment is at the schematic diagram of neutral position;

Fig. 2 is that the gear locking device that the utility model embodiment provides changes the schematic diagram to a certain gear;

Fig. 3 is that the gear locking device that the utility model embodiment provides changes the schematic diagram to another gear.

Embodiment

Below by specific embodiment, also by reference to the accompanying drawings the utility model is described in further detail.

Fig. 1 to Fig. 3 shows the gear locking device that the utility model embodiment provides, the declutch shift shaft 1 that comprises shift fork body 2 and pass shift fork body 2 and coordinate with 2 activities of shift fork body, declutch shift shaft 1 offers draw-in groove 3, one side of the close draw-in groove 3 of shift fork body 2 is provided with blind hole 4, in blind hole 4, be provided with spring 5 and be placed in the lock ball 6 on spring 5, draw-in groove 3 is four, and blind hole 4 is three, draw-in groove 3 and blind hole 4 are all along the axial setting of declutch shift shaft 1, and two blind holes 4 are corresponding with two draw-in grooves 3 respectively.Lock ball 6 is steel ball, and draw-in groove 3 is circular groove.The gear locking device of the present embodiment is particularly useful for the locking gear level of tractor with small four wheels.

In the present embodiment, can realize switching and the locking of neutral gear and two gears, make it when neutral gear or any gear, all have two lock balls 6 snapping in the respective card slot 3 of declutch shift shaft 1 under the effect at spring force respectively, to lock gear, prevent out of supply.Meanwhile, also have a lock ball 6 to withstand on the surface of fork axle 1.While being neutral position, the lock ball 6 in middle blind hole 4 withstands on the surface of declutch shift shaft 1 under the effect of spring force, and the lock ball 6 in the blind hole 4 on both sides enters respectively in two draw-in grooves 3 corresponding on declutch shift shaft 1 under the effect of spring force, plays lock function; While changing to a certain gear, the axial force that shift fork body 2 moves overcomes the self-lock force of two springs 5 and two lock balls 6, drive spring 5 and lock ball 6 to move, when moving to two

lock balls

6 and 3 pairs of timings of another two draw-in grooves, two lock balls 6 are under the effect of spring force, enter respectively in two draw-in grooves 3 on declutch shift shaft 1, and another lock ball 6 withstands on the surface of declutch shift shaft 1 under the effect of spring force, be conducive to stress balance, make switching and the locking of gear more stable, reliable, and simple in structure, fabricating cost is lower.

In the utility model, it is annular that the shape of draw-in groove is not limited to, and can also be circle etc.; The distance that spacing between draw-in groove all can change to corresponding shelves by neutral gear by sliding gear or clutch collar is determined; The quantity of draw-in groove is also not limited to four, can be for more.

The foregoing is only preferred embodiment of the present utility model, be not limited to the utility model, for a person skilled in the art, the utility model can have various modifications and variations.All within spirit of the present utility model and principle, any modification of doing, be equal to replacement, improvement etc., within all should being included in protection domain of the present utility model.

Claims

1. a gear locking device, the declutch shift shaft that comprises shift fork body and pass described shift fork body and coordinate with described shift fork body activity, described declutch shift shaft offers draw-in groove, one side of the close described draw-in groove of described shift fork body is provided with blind hole, in described blind hole, be provided with spring and be placed in the lock ball on described spring, it is characterized in that, described draw-in groove is at least four, described blind hole is three, described draw-in groove and described blind hole are all along the axial setting of described declutch shift shaft, and two described blind holes are corresponding with two described draw-in grooves respectively.

2. gear locking device according to claim 1, is characterized in that, described draw-in groove is circular groove.

3. gear locking device according to claim 1, is characterized in that, described draw-in groove is four.