CN210153113U

CN210153113U - Wedge type overrunning clutch

Info

Publication number: CN210153113U
Application number: CN201920818561.0U
Authority: CN
Inventors: 董与彦; 迟峰; 卞维展; 刘国庆; 黄锋; 韩永龙; 董景毅
Original assignee: Shandong Lingong Construction Machinery Co Ltd
Current assignee: Shandong Lingong Construction Machinery Co Ltd
Priority date: 2019-05-31
Filing date: 2019-05-31
Publication date: 2020-03-17
Anticipated expiration: 2029-05-31

Abstract

The utility model discloses a wedge block formula freewheel clutch belongs to the engineering machine tool field for the loader gearbox. The wedge block type gear transmission mechanism comprises a middle input shaft and an outer ring gear, an inner ring cam is arranged between the middle input shaft and the outer ring gear, outer teeth are arranged on the edge of the inner ring cam, wedge blocks are arranged on grooves between the outer teeth, the working face of the inner ring cam is an arc-shaped groove, the wedge blocks and the contact face of an outer rolling path are involute curved faces, and the wedge blocks and the contact face of the inner rolling path are arc faces. The utility model discloses voussoir and outer raceway contact surface are the curved surface that gradually bursts at seams, and contact stress is little, and contact continuity is good, and the meshing is steady, and voussoir and interior raceway contact surface are the arc surface, and contact stress is little.

Description

Wedge type overrunning clutch

Technical Field

The utility model relates to an engineering machine tool field, specifically speaking especially relates to a wedge type freewheel clutch.

Background

At present, the most domestic ZL series loader gearboxes adopt planetary power gear shifting gearboxes, and a roller type overrunning clutch in the gearbox mainly comprises an input assembly and an outer ring gear, wherein the input assembly comprises an intermediate input shaft, an inner ring cam and an inner raceway on the inner ring cam. The inner roller way is composed of an inner ring cam and baffle plates at two sides, a roller is arranged in the inner roller way, and at least one pin hole for installing a spring is arranged on the inner wall of the inner roller way. In the use process, the roller and the input assembly do circular motion together, and the roller freely rolls in the inner raceway.

Because the roller is in line contact with the outer raceway and the inner raceway, the contact area is small, the contact stress is very large, and the working face is easily crushed, so that the overrunning clutch fails.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a can effectively reduce contact stress's wedge type freewheel clutch to overcome prior art in wedge type freewheel clutch's roller and outer raceway and interior raceway contact stress big, the working face is by the conquassation easily, leads to the defect that freewheel clutch became invalid.

The utility model discloses an adopt following technical scheme to realize:

wedge block formula freewheel clutch, including middle input shaft and outer ring gear, be equipped with the inner ring cam between middle input shaft and the outer ring gear, be equipped with the external tooth on the inner ring cam edge, be equipped with the voussoir in the recess between the external tooth, inner ring cam working face is convex recess, the voussoir is the curved surface that gradually bursts at the seams with outer raceway contact surface, the voussoir is the arc surface with inner raceway contact surface.

Preferably, a component support is installed in a pin hole of the outer teeth on the inner ring cam.

Preferably, the assembly support comprises a pin and a spring.

Preferably, the groove is communicated with an oil passage, and the wedge block is provided with an oil groove.

Preferably, a stop ring is arranged on the inner ring cam.

Preferably, a large bearing and a small bearing are arranged between the outer ring gear and the middle input shaft, and the large bearing and the small bearing are axially limited by a retainer ring and a spacer bush.

Compared with the prior art, the beneficial effects of the utility model are that: the utility model discloses voussoir and outer raceway contact surface are the curved surface that gradually bursts at seams, and contact stress is little, and contact continuity is good, and the meshing is steady, and voussoir and interior raceway contact surface are the arc surface, and contact stress is little.

Drawings

Fig. 1 is a schematic structural view of the present invention;

FIG. 2 is a sectional view taken along line A-A of FIG. 1;

FIG. 3 is a partial enlarged view of portion B of FIG. 2;

in the figure: 1. an intermediate input shaft; 2. a baffle ring; 3. a wedge block; 4. an outer ring gear; 5. an oil passage; 6. an inner ring cam; 7. a spacer sleeve; 8. a large bearing; 9. a retainer ring; 10. a small bearing; 11. a bolt; 12. a nut; 13. a knock pin; 14. a spring; 15. an outer tooth; 16. a groove; 17. an oil groove.

Detailed Description

The present invention will be further explained with reference to the accompanying drawings.

As shown in fig. 1 and 2, wedge block formula freewheel clutch, including middle input shaft 1 and outer ring gear 4, be equipped with inner ring cam 6 between middle input shaft 1 and the outer ring gear 4, be equipped with external tooth 15 on the 6 edges of inner ring cam, be equipped with between external tooth 15 of inner ring cam 6 with the equal radial recess 16 of voussoir 3 circular arc, be equipped with voussoir 3 in the recess 16, the 6 working face of inner ring cam is convex recess 16, voussoir 3 is the curved surface that gradually bursts at seams with the outer raceway contact surface, voussoir 3 is the arc surface with the inner raceway contact surface.

Preferably, as shown in fig. 3, a component support is installed in a pin hole of the external teeth 15 on the inner ring cam 6, the component support comprises a top pin 13 and a spring 14, the top pin 13 and the spring 14 are installed in the pin hole of the external teeth 15 on the inner ring cam 6, the wedge 3 is supported by a component formed by the top pin 13 and the spring 14 and swings with the wedge 3 within a certain angle, and therefore the overrunning clutch is wedged and separated.

Preferably, the grooves 16 between the outer teeth 15 communicate with the oil passages 5 into which lubricating oil is introduced, and the bottom of the wedge 3 is provided with an oil groove 17 for storing lubricating oil.

Preferably, the inner ring cam 6 is provided with the retaining rings 2, and the wedge 3 is limited by the two retaining rings 2 on the inner ring cam 6

When the utility model is manufactured, the middle input shaft 1 is connected with the inner ring cam 6 through the bolt 11; the outer teeth 15 are provided with wedges 3 matched with the outer teeth, a large bearing 8 and a small bearing 10 are arranged between the outer ring gear 4 and the middle input shaft 1, and the large bearing 8 and the small bearing 10 are axially limited by a retainer ring 9 and a spacer 7.

When the overrunning clutch is used, the wedge block 3, the middle input shaft 1 and the inner ring cam 6 move circularly together, and in the clutch process, the wedge block 3 is supported by an assembly consisting of the ejector pin 13 and the spring 14 by taking the upper groove 16 of the inner ring cam 6 as a fulcrum and swings within a certain angle to realize the wedging and the disengagement of the overrunning clutch.

Claims

1. The utility model provides a wedge type freewheel clutch, includes middle input shaft (1) and outer ring gear (4), be equipped with inner ring cam (6) between middle input shaft (1) and outer ring gear (4), be equipped with outer tooth (15) on inner ring cam (6) edge, be equipped with voussoir (3), its characterized in that in recess (16) between outer tooth (15): the working surface of the inner ring cam (6) is an arc-shaped groove (16), the contact surface of the wedge block (3) and the outer raceway is an involute curved surface, and the contact surface of the wedge block (3) and the inner raceway is an arc surface.

2. The sprag-type overrunning clutch according to claim 1, wherein: and an assembly support is arranged in a pin hole of the outer teeth (15) on the inner ring cam (6).

3. The sprag-type overrunning clutch according to claim 2, wherein: the assembly support comprises a knock pin (13) and a spring (14).

4. The sprag-type overrunning clutch according to claim 1, wherein: the groove (16) is communicated with the oil duct (5), and an oil groove (17) is formed in the wedge block (3).

5. The sprag-type overrunning clutch according to claim 1, wherein: and the inner ring cam (6) is provided with a baffle ring (2).

6. The sprag-type overrunning clutch according to any one of claims 1 to 5, wherein: a large bearing (8) and a small bearing (10) are arranged between the outer ring gear (4) and the middle input shaft (1), and the large bearing (8) and the small bearing (10) are axially limited by a retainer ring (9) and a spacer bush (7).