CN207750164U - A kind of engine shift fork - Google Patents

Abstract

A kind of engine shift fork, shift fork bar body includes yoke bar, the yoke bar is integrally formed using high strength plastic materials, yoke bar one end is provided with and the matched upper jag position of electromagnetic switch pull rod, the other end is provided with the lower jag position for avoiding isolator slip ring slot outer circle, and shift fork pin hole is additionally provided on yoke bar；The lower jag position jag end is provided with the axis pin for installing sliding block, and lower jag position is the semicircular structure that internal diameter is more than isolator slip ring outer diameter；The sliding block is provided with pin hole compatible with the axis pin of yoke bar, and sliding block is provided with end face compatible with isolator, and sliding block is provided with isolator and surmounts operative end surface and isolator dial-out operative end surface；The utility model is novel in design, and simple for process, weight is light by 80% compared with steel part structure shift fork, cost reduction 25%, meets the requirement of vehicle lightweight low cost, while the service life of starter greatly prolongs, and using effect is good.

Description

A kind of engine shift fork

Technical field

The technical field with manufacture more particularly to a kind of engine shift fork the utility model is related to starter design.

Background technology

In the prior art, the shift fork generally use steel part material of starter, primary structure is by two left and right symmetrical group Thickness is respectively adopted in fork arm and two cylinder sliding blocks or a semicircle slip ring composition, the left and right symmetrical yoke bar of two of which Degree for 3~4 millimeters steel part punching press, bending form, be then welded as a whole using salient point welding manner, then with cylinder sliding block or Person's semicircle slip ring rivets.In the actual production processing of shift fork, after the bendings of two yoke bars, welding, frequently result in Two yoke bar registrations of shift fork are poor, have seriously affected the meshing performance and reliability of starter, reduced the competitiveness of product.

Vehicle lightweight simultaneously, high reliability request have become the new trend of starter development, it is desirable that starter light weight Change, reliability height.

Invention content

The goal of the invention of the utility model is to overcome the above-mentioned insufficient of existing engine shift fork and provide a kind of starter Shift fork effectively reduces cost, and can promote the competitiveness of starter, ensures the service life of starter.

Technical solution adopted by the utility model to solve its technical problems is：Shift fork ontology includes yoke bar, described Yoke bar is integrally formed, and yoke bar one end is provided with to be provided with the matched upper jag position of electromagnetic switch pull rod, the other end Lower jag position for avoiding isolator slip ring slot outer circle, lower jag position are equipped with two for coordinating with isolator slip ring Sliding block；Shift fork pin hole is additionally provided on yoke bar；The lower jag position jag end is provided with the axis pin for installing sliding block, Lower jag position is the semicircular structure that internal diameter is more than isolator slip ring outer diameter；The sliding block is provided with the axis pin phase with yoke bar The pin hole of adaptation, sliding block are provided with end face compatible with isolator, sliding block be provided with isolator surmount operative end surface with it is unidirectional Device transfers to operative end surface.

It is provided with reinforcing rib on the inside of the semi-circular shape at lower jag position described in the utility model.

Sliding block described in the utility model is two, is set relatively at the lower jag position of yoke bar.

Sliding block described in the utility model uses powdered metallurgical material.

The pin hole of sliding block described in the utility model be through-hole, and with axis pin clearance fit.

Center described in the utility model and pin hole center are misaligned, and eccentricity is Δ, Δ 0.5-1.5mm.

The pin aperture centerline of sliding block described in the utility model to isolator surmounts pin of the distance more than sliding block of operative end surface Centerline hole transfers to the distance of operative end surface to isolator.

Yoke bar described in the utility model uses high strength plastic materials.

The utility model has the beneficial effects that：

（1）The utility model is applied to various starter assembly, can greatly prolong the service life of starter；

（2）The utility model is novel in design, and simple for process, weight is light by 80% compared with steel part structure shift fork, cost reduction 25%, full Sufficient vehicle lightweight low cost requires, while the service life of starter greatly prolongs, and using effect is good；

（3）The utility model is applied to high-power planetary reduction starter assembly, will be using the starter of the structure shift fork Engine pedestal endurance test is carried out, the service life of starter is promoted to 50,000 time by 35,000 times, meets vehicle significantly Requirement.

Description of the drawings

Fig. 1 is the utility model structure diagram.

Fig. 2 is the utility model yoke bar structural schematic diagram.

Fig. 3 is the utility model slide block structure schematic diagram.

Fig. 4 is the utility model sliding block front view.

Fig. 5 is the utility model Slipper sectional view.

Fig. 6 is the utility model application installation diagram.

In figure：1, shift fork ontology, 2, yoke bar, 3, sliding block, 4, upper jag position, 5, lower jag position, 6, axis pin, 7, dial Bolt hole, 8, reinforcing rib, 9, pin hole, 10, end face, 11, isolator surmount operative end surface, 12, isolator transfer to operative end surface.

Specific implementation mode

Presently in connection with attached drawing, the technical scheme in the utility model embodiment is clearly and completely described, this attached drawing For simplified schematic diagram, only illustrate the basic structure of the utility model in a schematic way.

According to Fig. 1, the shift fork ontology 1 of the utility model is equipped with the yoke bar 2 for transmitting torque, is equipped with for dialling Two sliding blocks 3 of dynamic isolator, described two 3 rounded array distributions of sliding block are in 2 times jag positions of yoke bar, 5 jag end. The yoke bar 2 is integrally formed using high strength plastic materials.

According to Fig.2,2 one end of yoke bar of the utility model is equipped with the upper jag for coordinating with electromagnetic switch pull rod Position 4, the other end are equipped with the lower jag position 5 for avoiding isolator slip ring slot outer circle, and yoke bar 2 is equipped with to be dialled for fixed Fork, the shift fork pin hole 7 with shifting fork pin cooperation；Lower jag position 5 is semicircular structure, and internal diameter is more than the outer of isolator slip ring Diameter, 5 jag end of lower jag position are equipped with two axis pins 6 for assembling sliding block；5 semicircular inner side of lower jag position is equipped with and is used for Promote the reinforcing rib 8 of 2 intensity of yoke bar；Yoke bar 2 is using the plastic material of high intensity, and processing technology is good, product size one Cause property is good.

According to fig. 3 shown in -5, the sliding block 3 of the utility model is equipped with the pin hole 9 coordinated with the axis pin 6 of yoke bar 2, be equipped with The end face 10 of isolator slip ring cooperation, surmounts operative end surface 11 equipped with isolator, is equipped with isolator and transfers to operative end surface 12；Sliding block The center line of 3 vertical center line and pin hole 9 is misaligned, and isolator when surmounting surmounts hanging down for 11 opposing slider 3 of operative end surface The distance at straight center is more than the distance that isolator when transfering to transfers to the vertical centre of 12 opposing slider 3 of operative end surface, eccentricity Δ is 1.2mm, and eccentricity, which is Δ, to be adjusted according to the work stressing conditions of starter and life requirements, and pin hole 9 is logical Hole, internal diameter coordinate with the axis pin 6 of yoke bar 2 with small―gap suture is combined into；3 material of sliding block is powdered metallurgical material.

According to Fig.6, when the shift fork ontology 1 of the utility model assembles, in the outer surface of two axis pins 6 of yoke bar 2 Moderate lubrication fat is smeared, is assembled on starter convenient for shift fork ontology 1；The top of shift fork ontology 1 and electromagnetic switch rod assembly 13 match, and shifting fork pin 14 passes through the shift fork pin hole 7 of shift fork ontology 1, and is fixed shift fork ontology 1 by axial limiting, shift fork The sliding block 3 of ontology 1 coordinates with the slip ring of isolator 15；When electromagnetic switch is powered, rod assembly 13 moves right, in shift fork sheet Under the leverage of body 1, isolator 15 is driven to move downward, completion starter is engaged with engine flywheel ring gear；Work as starting Machine is successfully by after engine start, electromagnetic switch power-off, and rod assembly 13 retracts under the action of spring force to the left inside it, Shift fork ontology 1 is driven to move right, until 15 return of isolator.

Claims (8)

1. a kind of engine shift fork, it is characterised in that：Shift fork ontology（1）Including yoke bar（2）, the yoke bar（2）One Molding, yoke bar（2）One end is provided with and the matched upper jag position of electromagnetic switch pull rod（4）, the other end, which is provided with, to be used for Avoid the lower jag position of isolator slip ring slot outer circle（5）, lower jag position（5）Equipped with two for coordinating with isolator slip ring A sliding block（3）；Yoke bar（2）On be additionally provided with shift fork pin hole（7）；The lower jag position（5）Jag end, which is provided with, to be used for Sliding block is installed（3）Axis pin（6）, lower jag position（5）It is more than the semicircular structure of isolator slip ring outer diameter for internal diameter；The cunning Block（3）It is provided with and yoke bar（2）Axis pin（6）Compatible pin hole（9）, sliding block（3）It is provided with compatible with isolator End face（10）, sliding block（3）It is provided with isolator and surmounts operative end surface（11）Operative end surface is transferred to isolator（12）.

2. a kind of engine shift fork according to claim 1, it is characterised in that：The lower jag position（5）Semicircle Annular inboard is provided with reinforcing rib（8）.

3. a kind of engine shift fork according to claim 1, it is characterised in that：The sliding block（3）It it is two, in shift fork Bar（2）Lower jag position（5）It sets relatively.

4. a kind of engine shift fork according to claim 1, it is characterised in that：The sliding block（3）Using powder metallurgy Material.

5. a kind of engine shift fork according to claim 1, it is characterised in that：The sliding block（3）Pin hole（9）It is logical Hole, and and axis pin（6）Clearance fit.

6. a kind of engine shift fork according to claim 1, it is characterised in that：The sliding block（3）Center and pin hole（9） Center is misaligned, and eccentricity Δ is 0.5-1.5mm.

7. a kind of engine shift fork according to claim 1, it is characterised in that：The sliding block（3）Pin hole（9）Center line Surmount operative end surface to isolator（11）Distance be more than sliding block（3）Pin hole（9）Center line to isolator transfers to operative end surface （12）Distance.

8. a kind of engine shift fork according to claim 1, it is characterised in that：The yoke bar（2）Using high intensity Plastic material.