CN208169363U

CN208169363U - Shift fork bushing

Info

Publication number: CN208169363U
Application number: CN201820227664.5U
Authority: CN
Inventors: 柳彦涛; 何岩青
Original assignee: Great Wall Motor Co Ltd
Current assignee: Honeycomb Drive System Jiangsu Co Ltd
Priority date: 2018-02-08
Filing date: 2018-02-08
Publication date: 2018-11-30
Anticipated expiration: 2028-02-08

Abstract

The utility model provides a kind of shift fork bushing, and the shift fork bushing includes bush body, shift fork axle interconnecting piece, mounting groove, elastic seal ring and interconnecting part, wherein shift fork axle interconnecting piece is set to one end of bush body, to be attached to shift fork axle；Mounting groove is at least two on the outer peripheral surface for be formed in bush body, and elastic seal ring set is in each mounting groove；Interconnecting part is set to the other end of bush body relative to shift fork axle interconnecting piece, and both ends are connected to bush body end and mounting groove.The shift fork bushing of the utility model passes through setting mounting groove, elastic seal ring can be integrated into bush body, by the way that interconnecting part is arranged, the pressure that can be will act on bush body end is transmitted on elastic seal ring, so that elastic seal ring radial direction spreading and there is preferable leakproofness, and being capable of shift fork axis reliable movement；In addition, the elastic seal ring of spreading can also be by carrying out pressure release to hydraulic oil, can play position-limiting action at the end of shift.

Description

Shift fork bushing

Technical field

The utility model relates to technical field of automobile parts, in particular to a kind of shift fork bushing.

Background technique

Clutch is that engine and transmission power transmit " switch ", it is one between engine and speed changer Kind can transmit power and cut off the transmission mechanism of power, its effect mainly guarantees the gentle start of automobile energy, and speed change is changed It can reduce the shock loading of transmission gear when gear and prevent power train from overloading.

Double-clutch automatic gearbox is there are two clutch-plate, the characteristics of with its power failure-free, occupies in speed changer field The market share increases year by year, and double-clutch automatic gearbox includes wet-type dual-clutch and dry dual clutch again, wherein wet type is double Clutch speed changer provides power by hydraulic system, realizes to shift fork movement and the control of gear shifting force size.

In the prior art, it pushes piston to support shift fork axle by the hydraulic oil in hydraulic cavities, and then realizes to shift fork position It is mobile, realize shift.And existing structure, under the premise of meeting the basic demand of shift process, there is also following disadvantages:

(1) piston and shift fork axle are separately positioned, seal chamber is carried out being filled with hydraulic oil establish pressure environment during, Due to piston there are problems that because be vented it is unsmooth caused by unbalance stress, may cause piston tumble, clamping stagnation risk, influence to change Gear.

(2) seal chamber that hydraulic oil is formed in rigid set, fully relies on the interference fit between piston and steel bushing, transports in shift fork When dynamic, there are frictional resistance for not oil-filled side piston, cause the waste of shift kinetic energy, accelerate the abrasion of piston, reduce piston and use Service life.

(3) modes such as shifting system mostly uses tooth to cover the limit of high tooth and gear face limit, at the end of shift, limit Mutually impact generates noise between face, influences gearbox NVH performance, and multiple impact can accelerate synchronizer gear sleeve abrasion.

(4) presence of piston structure causes shifting system axial direction occupied space big, influences gearbox size.

Utility model content

In view of this, the utility model is directed to a kind of shift fork bushing, be sealed with may replace piston, and have compared with Good using effect.

In order to achieve the above objectives, the technical solution of the utility model is realized in：

A kind of shift fork bushing comprising：

Bush body is configured with shift fork axle interconnecting piece in one end of the bush body；

The circumferential direction of mounting groove, bush body described in ring is formed on the outer peripheral surface of the bush body and for along the lining Cover at least two of the axially spaced-apart arrangement of ontology；

Elastic seal ring, in each mounting groove respectively be embedded with one；

Interconnecting part relative to the shift fork axle interconnecting piece, is formed in the other end of the bush body, and the interconnecting part It is arranged to constitute the connection between the end of the bush body and each mounting groove.

Further, the shift fork axle interconnecting piece is the plug-in opening for being set to the bush body end.

Further, correspond to the plug-in opening, be formed with boss in the end of the bush body, the plug-in opening passes through Wear the boss setting.

Further, the radial arrangement along the bush body is equipped in the boss and cross the plug-in opening Pin hole.

Further, the mounting groove is two of the axially spaced-apart arrangement along the bush body.

Further, the interconnecting part include along the bush body axial arrangement and one end penetrate through to the bushing First communicating passage of body end, and the second connection being connected between first communicating passage and each mounting groove Channel.

Further, first communicating passage is the annular groove being circumferentially arranged along the bush body.

Further, first communicating passage is the blind hole axially arranged along the bush body.

Further, second communicating passage is the intercommunicating pore radially arranged along the bush body.

Compared with the existing technology, the utility model has the advantage that：

(1) elastic seal ring can be integrated into bush body by the way that mounting groove is arranged by the shift fork bushing of the utility model On, by the way that interconnecting part is arranged, the pressure that can be will act on bush body end is transmitted on elastic seal ring, so that elasticity is close Seal radial direction spreading and there is preferable leakproofness, and being capable of shift fork axis reliable movement；In addition, shift at the end of spreading bullet Property sealing ring can also by its gap between mounting groove to hydraulic oil carry out pressure release, the driving force to shift fork axle can be reduced, Position-limiting action can be played, and there is preferable using effect.

(2) shift fork axle interconnecting piece is plug-in opening, and convenient for the installation of shift fork axle, and its structure is simple, processing easy to manufacture.

(3) shift fork axle connection reliability can be improved in setting boss.

(4) design of pin-and-hole structure can further increase the reliability of shift fork axis connection by pin.

(5) interconnecting part is composed of the first communicating passage and the second communicating passage, can be convenient for interconnecting part in bush body On setting.

(6) first communicating passages use annular groove, are easily worked manufacture, and pressure transfer effect is good.

(7) second communicating passages are intercommunicating pore, and structure is simple, easy to accomplish.

Detailed description of the invention

Fig. 1 is the front view of shift fork bushing described in the utility model embodiment one；

Fig. 2 is the cross-sectional view in the direction A-A in Fig. 1；

Fig. 3 is shift fork bushing course of work schematic diagram described in the utility model embodiment one；

Fig. 4 is the cross-sectional view in the direction B-B in Fig. 3；

Fig. 5 is that elastic seal ring described in Fig. 4 removes the structural schematic diagram under the cylinder sleeve state；

Description of symbols：

1- bush body, 2- boss, 3- pin hole, 4- mounting groove, 5- elastic seal ring, 6- steel bushing, 7- plug-in opening, 8- ring Connected in star, 9- oil filler point, 10- intercommunicating pore.

Specific embodiment

It should be noted that in the absence of conflict, the feature in the embodiments of the present invention and embodiment can To be combined with each other.

The utility model will be described in detail below with reference to the accompanying drawings and embodiments.

Embodiment one

The present embodiment is related to a kind of shift fork bushing comprising bush body is equipped with connection shift fork in one end of bush body The shift fork axle interconnecting piece of axis is provided with the mounting groove being spaced apart, and the quantity of mounting groove in the outer circumference of ring bush body At least two, elastic seal ring is also embedded in each mounting groove, in addition, relative to shift fork axle interconnecting piece, in bush body The other end be additionally provided with connection bush body end and mounting groove interconnecting piece.

Elastic seal ring can be integrated into bush body by the shift fork bushing of the utility model by setting mounting groove, be led to Setting interconnecting part is crossed, the pressure that can be will act on bush body end is transmitted on elastic seal ring, so that elastic seal ring Radial spreading and there is preferable leakproofness, and being capable of shift fork axis reliable movement；In addition, the elasticity of spreading is close at the end of shift Seal can also carry out pressure release to hydraulic oil by its gap between mounting groove, the driving force to shift fork axle can be reduced, with energy Enough play position-limiting action.

Based on design philosophy as above, a kind of exemplary structure of the shift fork bushing of the present embodiment as shown in Fig. 1 and Fig. 2, It includes one in tubular bush body 1, in the one end of bush body 1, be formed with inserting for installation shift fork axle Hole 7, the axis of plug-in opening 7 and the axis collinear of bush body 1 are filled, and the length of plug-in opening 7 is less than the length of bush body 1.

The circumferential direction of ring bush body 1, in being also formed at least two arranged for interval on the outer circumference face in bush body 1 Mounting groove 4, and each mounting groove 4 is distributed along the axis of bush body 1, elastic seal ring 5 in each mounting groove 4, In the sliding process of bush body 1, mounting groove 4 can effectively prevent disengaging and sliding of the elastic seal ring 5 in bush body 1. Mounting groove 4 is two in the present embodiment, and each elastic seal ring 5 is flush-mounted in each mounting groove 4 respectively, certainly, mounting groove 4 and elasticity The number of sealing ring 5 can also be arranged to multiple according to specific use demand.

In addition, being formed with boss 2 in the other end of bush body 1 relative to plug-in opening 7, whole boss 2 is in bulk, And plug-in opening 7 runs through boss 2, and in being disposed with the pin hole 3 for crossing plug-in opening 7 on boss 2 along 1 radial direction of bush body, boss 2 is arranged It can be in order to the processing and manufacturing of pin hole 3.After shift fork axle is installed to plug-in opening 7, pin may pass through pin hole 3, realize to shift fork axle The fixed of installation is reinforced, it is of course also possible to be not provided with boss 2, pin hole 3 is directly set to the excircle of one end of bush body 1 On, to realize identical function.

Relative to plug-in opening 7, the company of connection bush body 1 end and mounting groove 4 is additionally provided in the other end of bush body 1 Logical portion, and the interconnecting part include along the bush body 1 axial arrangement and one end penetrate through to the first of 1 end of bush body Communicating passage, and the second communicating passage being connected between the first communicating passage and each mounting groove 4.Such as Fig. 3 and Fig. 4 Shown in, the first communicating passage is specially the annular groove 8 being circumferentially arranged along bush body 1, the second connection in the present embodiment Channel is then that will be applied to the pressure of 1 end of bush body along 1 circumferentially spaced six intercommunicating pore 10 of bush body Power is transmitted on the elastic seal ring 5 in mounting groove 4.

Above-mentioned annular groove 8 is easily worked manufacture, and pressure transfer effect is good, and 10 structure of intercommunicating pore is simple, is easily worked Manufacture.Certainly, the first communicating passage can also be the axial cloth along bush body 1 other than for above-mentioned annular groove 8 The multiple blind holes set, when the first communicating passage is blind hole, intercommunicating pore 10 is still can be used in the second communicating passage, to be connected to each blind hole With each mounting groove 4.Meanwhile the number of intercommunicating pore 10 can also be adjusted according to the setting of the particular number of the first communicating passage.

In order to improve the structural strength of bush body 1, on the junction and boss of boss 2 and cylindrical bush ontology 12 Side be arranged respectively to chamfering；For the ease of the installation of shift fork bushing, relative to boss 2, in the other end of bush body 1 It is provided with chamfering.

The working principle of the shift fork bushing of the present embodiment is as follows.

Referring to Fig. 4, in use, the sliding of bush body 1 is set in cylinder-shaped steel bushing 6, and 6 bottom of steel bushing is equipped with oil filler point 9, Shift fork axle is installed in the plug-in opening 7 in bush body 1, and passes through pin hole 3 by pin and the installation of shift fork axle is fixed Reinforce.

Under the action of mechanical pump, hydraulic oil is flowed into steel bushing 6 by oil filler point 9, to form pressure environment, bushing sheet 1 end of body can be along the sliding axially outward of steel bushing 6 by the pressure of hydraulic oil, and then shift fork axle is driven to be moved.Meanwhile Hydraulic oil in steel bushing 6 is flowed into intercommunicating pore 10, by the annular groove 8 set on 1 one end of bush body finally by hydraulic oil Pressure be applied on the elastic seal ring 5 in mounting groove 4, elastic seal ring 5 by hydraulic oil pressure along its radial direction to Outer spreading, to be sealed to 10 during casing slip, so as to the movement of reliable shift fork axis.

With the sliding of bush body 1, as shown in Figure 5, the elastic seal ring 5 when in the outer part just slides out steel bushing 6 When, due to the limitation departing from 6 inner wall of steel bushing, elastic seal ring 5 will continue to the radial spreading due to pressure of hydraulic oil, work as bullet Property 5 spreading of sealing ring to when being formed with gap with bush body 1, hydraulic oil can pass through gap outflow and carry out pressure release, elastic packing Circle 5 bounces back because hydraulic oil active force reduces, and is ultimately retracted in mounting groove 4, reduction of the bush body 1 because of hydraulic oil active force And slowly stop motion, and then realize the mobile stopping of shift fork axle.

In the present embodiment, flowed in steel bushing 6 in addition to hydraulic oil, can also be compressed air, when in steel bushing 6 flow pressure When contracting air, working principle and hydraulic oil it is consistent, details are not described herein.

The above is only the preferred embodiment of the utility model only, is not intended to limit the utility model, all at this Within the spirit and principle of utility model, any modification, equivalent replacement, improvement and so on should be included in the utility model Protection scope within.

Claims

1. a kind of shift fork bushing, it is characterised in that including：

Bush body (1) is configured with shift fork axle interconnecting piece in one end of the bush body (1)；

The circumferential direction of mounting groove (4), bush body (1) described in ring is formed on the outer peripheral surface of the bush body (1) and for along institute State at least two of the axially spaced-apart arrangement of bush body (1)；

Elastic seal ring (5), it is interior respectively embedded with one in each mounting groove (4)；

Interconnecting part relative to the shift fork axle interconnecting piece, is formed in the other end of the bush body (1), and the interconnecting part It is arranged to constitute the connection between the end of the bush body (1) and each mounting groove (4).

2. shift fork bushing according to claim 1, it is characterised in that：The shift fork axle interconnecting piece is to be set to the bushing The plug-in opening (7) of ontology (1) end.

3. shift fork bushing according to claim 2, it is characterised in that：Corresponding to the plug-in opening (7), in the bushing sheet The end of body (1) is formed with boss (2), and the plug-in opening (7) is arranged through the boss (2).

4. shift fork bushing according to claim 3, it is characterised in that：It is equipped in the boss (2) along the bushing sheet The radial arrangement of body (1) and the pin hole (3) for crossing the plug-in opening (7).

5. shift fork bushing according to claim 1, it is characterised in that：The mounting groove (4) is along the bush body (1) Axially spaced-apart arrangement two.

6. shift fork bushing according to any one of claim 1 to 5, it is characterised in that：The interconnecting part includes along described The axial direction of bush body (1) is arranged and one end is penetrated through to the first communicating passage of the bush body (1) end, and connection The second communicating passage between first communicating passage and each mounting groove (4).

7. shift fork bushing according to claim 6, it is characterised in that：First communicating passage is along the bush body (1) the annular groove (8) being circumferentially arranged.

8. shift fork bushing according to claim 6, it is characterised in that：First communicating passage is along the bush body (1) the blind hole axially arranged.

9. shift fork bushing according to claim 8, it is characterised in that：First communicating passage is bush body described in ring (1) circumferentially spaced multiple.

10. shift fork bushing according to claim 6, it is characterised in that：Second communicating passage is along the bushing sheet The intercommunicating pore (10) of body (1) radially arranged.