CN102927267A

CN102927267A - Gear self-locking device of mechanical automatic gearbox of electric motor coach

Info

Publication number: CN102927267A
Application number: CN2012104283405A
Authority: CN
Inventors: 唐海滨; 卢晓辉
Original assignee: Individual
Current assignee: Individual
Priority date: 2012-11-01
Filing date: 2012-11-01
Publication date: 2013-02-13

Abstract

The invention relates to a gear self-locking device of a mechanical automatic gearbox of an electric motor coach. The gear self-locking device comprises a casing and a shifting fork installed in the casing and connected onto a shifting fork shaft in penetrating mode, and a self-locking pin clamped with the shifting fork in self-locking mode correspondingly or deviating from the shifting fork is arranged on the inner wall of the casing. The gear self-locking device adopts a raised grain location opening on the shifting fork to correspond to a steel ball of the self-locking pin on the inner wall of the casing to achieve friction-free abrasion-free location locking of gears, and has the advantages of being simple in structure, convenient to assemble and maintain, reliable in self-locking location, stable in performance, long in service life and the like.

Description

A kind of electric motor coach mechanical automatic speed-changing gear box self-locking device

Technical field

The present invention relates to a kind of transmission of vehicle, is a kind of gear self-locking device for electric motor coach mechanical automatic speed-changing case specifically.

Background technique

The tradition gearbox gearshift location increase locating slot at declutch shift shaft often, realize the gear lock-bit by the corresponding locating slot of positioning self-lock device on the gear box casing, its structure is: the upper surface of declutch shift shaft is distributed with three grooves vertically, when any declutch shift shaft moves axially to the position of neutral gear or a certain work gear together with shift fork, must there be a groove just in time to aim at the self-locking steel ball, the self-locking steel ball embeds in this groove under the self-locking spring pressure-acting, the declutch shift shaft axial position is fixed, thereby shift fork also is fixed on neutral gear or a certain work gear together with sliding gear, can not deviate from voluntarily; When gear shift, the driver applies certain axial force to declutch shift shaft, and the pressure that overcomes self-locking spring pushes back in the hole extruding in the groove of steel ball by declutch shift shaft, and declutch shift shaft and shift fork move axially.Although said structure can be realized the lock-bit of shift fork gear, hold out against on declutch shift shaft owing to the self-locking steel ball overcomes self-locking spring pressure all the time, and friction is larger between the declutch shift shaft, uses for a long time inefficacy easy to wear, the gear self-locking property is unstable, and working life is short.

Summary of the invention

In order to overcome the deficiency of automatic speed changing gear box self-locking effect of attrition auto-lock function in the prior art, the invention provides a kind of simple in structurely, assembling, safeguard conveniently, lock-bit is reliable, stable performance, the electric motor coach mechanical automatic speed-changing gear box self-locking device of long service life.

The technical solution used in the present invention is: a kind of electric motor coach mechanical automatic speed-changing gear box self-locking device, comprise housing and be installed on the shift fork of cross-under on declutch shift shaft in the housing that its technical characterstic is that described inner walls is provided with one and is the self-lock pin of corresponding clamping self-locking or disengaged condition with shift fork.

Described shift fork is provided with a ripple glaze positioning port, and the ripple glaze positioning port is corresponding clamping self-locking or disengaged condition with self-lock pin.

Described self-lock pin comprises shank, spring and steel ball, and shank one end is connected on the inner walls, in the inner chamber of the shank the other end spring is set, and steel ball is connected to and is correspondence on the spring and snaps in the self-locking of ripple glaze positioning port or the poroid attitude of self-locking when in disengagement.

Described self-lock pin also comprises pushing block, and pushing block is arranged at the other end inner chamber of shank, and on the inner linking springs of pushing block, steel ball is the outer end that incomplete containing is movably connected on pushing block.

Described self-lock pin also comprises a plurality of balls, and a plurality of balls are arranged at steel ball and contain between the pushing block opening of steel ball and make steel ball be rolling condition in the pushing block opening.

Compared with prior art, advantage of the present invention is: steel ball and the corresponding clamping of ripple glaze positioning port, and when gear did not put in place, steel ball did not contact with shift fork, or did not contact or contact without pressure between the low degree of steel ball and the ripple glaze positioning port outside, did not have wearing and tearing; When gear put in place, two flash of ripple glaze positioning port advanced steel ball to the pushing block inner chamber, sent into center low degree realization lock-bit in the ripple glaze positioning port after the steel ball indentation under the effect of spring again, and it is firm to locate; Simultaneously a plurality of steel balls of steel ball in the pushing block opening roll, and are conducive to reduce friction and reduce wear, and prolong steel ball working life.

The present invention adopts the steel ball that ripple glaze positioning port corresponding housing inwall self-lock pin is set on the shift fork to realize gear without friction, wearing and tearing positioning and locking, has simple in structurely, assembling, safeguards conveniently, and lock-bit is reliable, stable performance, the advantages such as long service life.

Description of drawings

Fig. 1 is structural representation of the present invention;

Fig. 2 is self-lock pin structural representation of the present invention.

Among the figure: housing 1, self-lock pin 2, shift fork 3, declutch shift shaft 4, shank 5, spring 6, pushing block 7, steel ball 8, steel ball 9, ripple glaze positioning port 10.

Embodiment

The invention will be further described below in conjunction with drawings and Examples.

Shown in Fig. 1,2, a kind of electric motor coach mechanical automatic speed-changing gear box self-locking device comprises self-lock pin 2 and ripple glaze positioning port 10.Declutch shift shaft 4 is installed in the housing 1, declutch shift shaft 4 cross-under are on shift fork 3, shift fork 3 is provided with a ripple glaze positioning port 10, housing 1 inwall is provided with one and is the self-lock pin 2 of corresponding clamping self-locking or disengaged condition with shift fork 3, self-lock pin 2 comprises shank 5, spring 6, pushing block 7, steel ball 9 and a plurality of ball 8, shank 5 one ends are connected on housing 1 inwall, in the inner chamber of shank 5 the other ends spring 6 is set, on the inner linking springs 6 of pushing block 7, steel ball 9 is outer end that incomplete containing is movably connected on pushing block 7 and is correspondence and snaps in 10 self-lockings of ripple glaze positioning port or the poroid attitude of self-locking when in disengagement, and a plurality of balls 8 are arranged at steel ball 9 and contain between the pushing block opening of steel ball and make steel ball be rolling condition in the pushing block opening; The ripple glaze positioning port is corresponding clamping self-locking or disengaged condition with self-lock pin.

Claims

1. electric motor coach mechanical automatic speed-changing gear box self-locking device comprises housing and is installed on the shift fork of cross-under on declutch shift shaft in the housing, it is characterized in that: described inner walls is provided with one and is the self-lock pin of corresponding clamping self-locking or disengaged condition with shift fork.

2. a kind of electric motor coach mechanical automatic speed-changing gear box self-locking device according to claim 1, it is characterized in that: described shift fork is provided with a ripple glaze positioning port, and the ripple glaze positioning port is corresponding clamping self-locking or disengaged condition with self-lock pin.

3. a kind of electric motor coach mechanical automatic speed-changing gear box self-locking device according to claim 1 and 2, it is characterized in that: described self-lock pin comprises shank, spring and steel ball, shank one end is connected on the inner walls, in the inner chamber of the shank the other end spring is set, steel ball is connected to and is correspondence on the spring and snaps in the self-locking of ripple glaze positioning port or the poroid attitude of self-locking when in disengagement.

4. a kind of electric motor coach mechanical automatic speed-changing gear box self-locking device according to claim 3, it is characterized in that: described self-lock pin also comprises pushing block, pushing block is arranged at the other end inner chamber of shank, and on the inner linking springs of pushing block, steel ball is the outer end that incomplete containing is movably connected on pushing block.

5. a kind of electric motor coach mechanical automatic speed-changing gear box self-locking device according to claim 4, it is characterized in that: described self-lock pin also comprises a plurality of balls, and a plurality of balls are arranged at steel ball and contain between the pushing block opening of steel ball and make steel ball be rolling condition in the pushing block opening.