Axial limiting anti-falling structure of driving gear of starter isolator

Abstract

The utility model discloses a driving gear axial limit anti-drop structure of a starter isolator, which comprises a spline tube and a driving gear which are matched with a key groove, the rear end of the driving gear is axially ejected through a spring, and the front end of the driving gear is axially limited through a composite axial check ring; the composite axial check ring comprises a hard blocking piece and an elastic gasket, the hard blocking piece and the elastic gasket are coaxially arranged in a laminated mode, and the elastic gasket is located on one side of the reset impact direction of the driving gear. According to the utility model, through the structural design of the rigid and elastic composite axial check ring, the rigid check sheet provides rigid limiting, and the elastic gasket absorbs reset impact, so that the check ring is prevented from being deformed or fractured.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the technical field of starter unidirectional device, especially relates to a drive gear axial limit anti -drop structure of starter unidirectional device. BACKGROUND

[0002] The drive gear axial limit structure of the existing starter unidirectional device mostly adopts single hard stop ring or single elastic stop ring, and the reset impact load of the drive gear under the long-term spring action is easy to cause the deformation, fracture or loosening of the stop ring, so frequent maintenance is needed. The traditional stop ring lacks elastic buffer design, and the reset impact of the drive gear is directly transmitted to the rigid stop ring, accelerates metal fatigue, and affects the service life. SUMMARY

[0003] The utility model discloses a drive gear axial limit anti -drop structure of starter unidirectional device, through the structure design of the composite axial stop ring of rigidity and elasticity, the rigid stop sheet provides rigid limit, and the elastic washer absorbs reset impact, thereby avoiding the deformation or fracture of the stop ring.

[0004] Technical scheme: in order to realize the above-mentioned purpose, the utility model discloses a drive gear axial limit anti -drop structure of starter unidirectional device, including the spline pipe and drive gear of key groove cooperation, and the drive gear rear end is axially popped through spring, and the front end is axially limited through composite axial stop ring;

[0005] The composite axial stop ring includes rigid stop sheet and elastic washer, and the rigid stop sheet and elastic washer are coaxially laminated, and the elastic washer is located on the side of the reset impact direction of the drive gear.

[0006] Further, the laminated surface of the rigid stop sheet is provided with a clamping groove, the laminated surface of the elastic washer is provided with a protrusion in correspondence, the protrusion is embedded in the clamping groove, and the laminated assembly of the elastic washer and the rigid stop sheet is realized.

[0007] Further, the protrusion and the elastic washer are of the same material and are integrally formed.

[0008] Further, the outer periphery of the spline pipe is provided with a circumferential groove at the mounting position of the composite axial stop ring, and in the composite axial stop ring:

[0009] The coaxial part of the rigid stop sheet is arranged in the circumferential groove to axially limit the rigid stop sheet.

[0010] The elastic washer is located outside the circumferential groove.

[0011] Further, the axial positioning member corresponding to the rigid stop sheet is circularly arrayed, the axial positioning member penetrates the pipe wall of the spline pipe and is connected with the rigid stop sheet to circumferentially limit the rigid stop sheet relative to the spline pipe.

[0012] Further, the hard stopper and the elastic pad are both two-segment split structure, the hard stopper comprises two hard semicircular stoppers, and the elastic pad comprises two elastic semicircular stoppers.

[0013] Further, the axial positioning member is an internal hexagonal bolt, an axial end of the spline tube is provided with a threaded blind hole penetrating a circumferential groove, the hard stopper is provided with a mounting hole, and the internal hexagonal bolt is screwed into the threaded blind hole and arranged through the mounting hole.

[0014] Further, the hard stopper is a low-carbon steel sheet, and the elastic pad is an elastic metal pad.

[0015] Beneficial effects: through the structural design of the hard and elastic composite axial stopper, the hard stopper can provide rigid limiting, and the elastic pad can effectively absorb the impact caused by the reset of the driving gear, so that the single rigid stopper or single elastic stopper is avoided from being directly impacted to be broken or deformed, the impact resistance is improved, the axial limiting failure of the stopper is avoided to cause the driving gear to slide off the spline tube, and the stability and safety of the starter unidirectional device are improved. BRIEF DESCRIPTION OF DRAWINGS

[0016] Figure 1 is a half-section structure schematic view of part components of the starter unidirectional device of the utility model;

[0017] Figure 2 is Figure 1 is a structure enlarged schematic view of the A area in the middle;

[0018] Figure 3 is a whole structure schematic view of the composite axial stopper;

[0019] Figure 4 is a structure exploded schematic view of the composite axial stopper. DETAILED DESCRIPTION

[0020] The utility model will be further described below in combination with the drawings.

[0021] For example, Figure 1 and Figure 2As shown in the figure, an axial limiting anti-falling structure of a drive gear of a starter one-way device, comprising a spline tube 1 and a drive gear 2 in key groove cooperation, the drive gear 2 is axially bumped at the rear end by a spring 3 and axially limited at the front end by a composite axial retaining ring 4; the composite axial retaining ring 4 comprises a rigid retaining sheet 41 and an elastic gasket 42, the rigid retaining sheet 41 and the elastic gasket 42 are coaxially laminated, and the elastic gasket 42 is located on the side of the drive gear 2 in the reset impact direction. The composite axial retaining ring 4 is designed by the rigid and elastic structure, the rigid retaining sheet 41 can provide rigid limiting, and the elastic gasket 42 can effectively absorb the impact caused by the reset of the drive gear 2, thereby avoiding the breakage or deformation of the single rigid retaining ring or the single elastic retaining ring caused by the direct impact, improving the impact resistance, preventing the axial limiting failure of the retaining ring from causing the drive gear 2 to slide off the spline tube 1, and improving the stability and safety of the starter one-way device.

[0022] The laminated surface of the rigid retaining sheet 41 is provided with a clamping groove 41b, and the laminated surface of the elastic gasket 42 is correspondingly provided with a protrusion 42a, the protrusion 42a is embedded in the clamping groove 41b, the laminated assembly of the elastic gasket 42 and the rigid retaining sheet 41 is realized, the clamping groove 41b and the protrusion 42 are interference fitted, the relative sliding between the laminates is prevented, and the assembly stability is improved.

[0023] In order to ensure the structural strength, the protrusion 42a and the elastic gasket 42 are integrally formed in the same material.

[0024] The outer periphery of the spline tube 1 is provided with a circumferential groove 10 at the mounting position of the composite axial retaining ring 4, and in the composite axial retaining ring 4: the coaxial part of the rigid retaining sheet 41 is arranged in the circumferential groove 10 to axially limit the rigid retaining sheet 41; the elastic gasket 42 is located outside the circumferential groove 10. The rigid retaining sheet 41 is embedded in the circumferential groove 10 to provide axial limiting, accurate axial positioning is realized, axial movement of the retaining ring is avoided, and the elastic gasket 42 is externally used to buffer impact.

[0025] As shown in the figure, Figure 2 and Figure 3 The utility model discloses a composite axial retaining ring 4, rigid retaining sheet 41 and elastic gasket 42 are coaxially laminated, and the elastic gasket 42 is located on the side of the drive gear 2 in the reset impact direction. The composite axial retaining ring 4 is designed by the rigid and elastic structure, the rigid retaining sheet 41 can provide rigid limiting, and the elastic gasket 42 can effectively absorb the impact caused by the reset of the drive gear 2, thereby avoiding the breakage or deformation of the single rigid retaining ring or the single elastic retaining ring caused by the direct impact, improving the impact resistance, preventing the axial limiting failure of the retaining ring from causing the drive gear 2 to slide off the spline tube 1, and improving the stability and safety of the starter one-way device.

[0026] In order to facilitate the assembly and maintenance of the composite axial retaining ring 4, and at the same time reduce the installation difficulty, in the utility model, as shown in the figure, Figure 3 and Figure 4As shown, the hard baffle 41 and the elastic gasket 42 are both two-section split structure, the hard baffle 41 includes two hard semicircular baffles 4.1, the elastic gasket 42 includes two elastic semicircular baffles 4.1. More specifically, the axial positioning member 5 is an internal hexagonal bolt, the axial end of the spline tube 1 is provided with a threaded blind hole 11 penetrating the circumferential groove 10, the hard baffle 41 is provided with a mounting hole 41a, the internal hexagonal bolt is screwed into the threaded blind hole 11 and passes through the mounting hole 41a.

[0027] The hard baffle 41 is a low-carbon steel sheet, and the elastic gasket 42 is an elastic metal gasket, which takes into account rigid support and elastic buffering, prolonging the service life. Preferably, the elastic metal gasket can be made of 65Mn spring steel.

[0028] The above is only the preferred embodiment of the present application, it should be pointed out that for those skilled in the art, without departing from the principles of the present application, can make a number of improvements and refinements, these improvements and refinements should also be considered within the scope of the present application.

Claims

1. An axial limiting anti-falling structure of a drive gear of a starter one-way device, comprising a spline tube (1) and a drive gear (2) matched by a key groove, the rear end of the drive gear (2) is axially bumped by a spring (3), and the front end is axially limited by a composite axial retaining ring (4). characterized in that The composite axial retaining ring (4) comprises a hard retaining sheet (41) and an elastic gasket (42), the hard retaining sheet (41) and the elastic gasket (42) are coaxially laminated, and the elastic gasket (42) is located on one side of the drive gear (2) in the reset impact direction.

2. The axial position and anti-falling structure of the drive gear of the starter one-way device according to claim 1, characterized in that: The laminated surface of the hard retaining sheet (41) is provided with a clamping groove (41b), and the laminated surface of the elastic gasket (42) is provided with a protrusion (42a) in correspondence, the protrusion (42a) is embedded in the clamping groove (41b), and the laminated assembly of the elastic gasket (42) and the hard retaining sheet (41) is realized.

3. The axial position and anti-falling structure of the drive gear of the starter one-way device according to claim 2, characterized in that: The protrusion (42a) and the elastic gasket (42) are integrally formed of the same material.

4. The axial position and anti-falling structure of the drive gear of the starter one-way device according to claim 2, characterized in that: A circumferential groove (10) is formed on the outer periphery of the spline tube (1) at the installation position of the composite axial retaining ring (4), and in the composite axial retaining ring (4): The coaxial part of the hard retaining sheet (41) is arranged in the circumferential groove (10) to axially limit the hard retaining sheet (41); The elastic gasket (42) is located outside the circumferential groove (10).

5. The axial position and anti-falling structure of the drive gear of a starter one-way device according to claim 4, characterized in that: An axial positioning member (5) is arranged in a circumferential array corresponding to the hard retaining sheet (41), the axial positioning member (5) penetrates the wall of the spline tube (1) and is connected with the hard retaining sheet (41) to circumferentially limit the hard retaining sheet (41) relative to the spline tube (1).

6. The axial position and anti-falling structure of the drive gear of a starter one-way device according to claim 5, characterized in that: The hard retaining sheet (41) and the elastic gasket (42) are both two-section split structures, the hard retaining sheet (41) comprises two hard semi-circular retaining sheets (4.1), and the elastic gasket (42) comprises two elastic semi-circular retaining sheets (4.1).

7. The axial position and anti-falling structure of the drive gear of a starter one-way device according to claim 6, characterized in that: The axial positioning member (5) is an internal hexagonal bolt, the axial end of the spline tube (1) is provided with a threaded blind hole (11) penetrating the circumferential groove (10), the hard retaining sheet (41) is provided with a mounting hole (41a), and the internal hexagonal bolt is screwed into the threaded blind hole (11) and passes through the mounting hole (41a).

8. The axial position and anti-falling structure of the drive gear of a starter one-way device according to any one of claims 1-7, characterized in that: The hard retaining sheet (41) is a low-carbon steel sheet, and the elastic gasket (42) is an elastic metal gasket.

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