Axial assembly limiting structure for spline pipe and gear of isolator

Abstract

The utility model discloses an isolator spline tube and gear axial assembly limiting structure which comprises a driving gear and a spline tube which are meshed through spline teeth and coaxially arranged, and the driving gear and the spline tube are meshed through the spline teeth and limited in the circumferential direction. A fixed limiting part and a movable limiting part are arranged on the spline pipe at intervals in the axial direction of the spline teeth, the movable limiting part conducts axial feeding on the spline pipe to extrude the driving gear to abut against the fixed limiting part, and the movable limiting part and the fixed limiting part are matched to axially clamp the driving gear. The driving gear on the spline pipe is axially clamped through the movable limiting part and the fixed limiting part to achieve axial limiting, and the stability of the driving gear assembled on the spline pipe is improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of starter isolators, and particularly relates to a spline tube and gear axial assembly limiting structure of the isolator. Background Art

[0002] When the driving gear of the one-way clutch is meshing with the flywheel, the driving gear moves forward and rubs against the flywheel. Since the driving gear in the prior art is axially limited by a retaining ring in the slot of the spline tube, frequent friction and collision can easily loosen the retaining ring or even break the bracket, causing the driving gear to fall off the tube. The assembly stability of the driving gear and the spline tube is not ideal. Summary of the invention

[0003] Purpose of the invention: In order to overcome the deficiencies in the prior art, the utility model provides a spline tube and gear axial assembly limit structure for a one-way clutch, which achieves axial limit by axially clamping the driving gear on the spline tube through a movable limit part and a fixed limit part, thereby improving the stability of the driving gear assembled on the spline tube.

[0004] Technical solution: To achieve the above purpose, the spline tube and gear axial assembly limiting structure of the one-way device of the utility model includes a driving gear and a spline tube arranged on the same axis through key teeth meshing, and the driving gear and the spline tube are circumferentially limited by key teeth meshing;

[0005] The spline tube is provided with a fixed limiting part and a movable limiting part on the axially spaced spline teeth. The movable limiting part axially feeds and squeezes the driving gear against the fixed limiting part on the spline tube, so that the movable limiting part cooperates with the fixed limiting part to axially clamp the driving gear.

[0006] Furthermore, the fixed limiting portion is located at the inner end side of the spline teeth of the spline tube, and the movable limiting portion is located at the outer end side of the spline teeth of the spline tube.

[0007] Furthermore, there are a plurality of the fixed limiting portions, and the plurality of the fixed limiting portions are distributed in a circumferential array along the circumference of the spline tube.

[0008] Furthermore, the fixed limiting portion is a raised structure that is integrally formed with the spline tube and protrudes from the tube surface, and the inner shaft end surface of the driving gear abuts against the raised structure.

[0009] Furthermore, the movable limiting portion is movably matched with the spline pipe thread.

[0010] Furthermore, the movable limiting portion includes a threaded retaining ring, and the spline tube is provided with a threaded portion corresponding to the threaded retaining ring. The threaded retaining ring cooperates with the threaded portion and is screwed into the spline tube to axially extrude the drive gear.

[0011] Furthermore, the threaded retaining ring is a first threaded retaining ring and a second threaded retaining ring, and the threaded portion on the spline tube includes an inner threaded portion corresponding to the first threaded retaining ring and an outer threaded portion corresponding to the second threaded retaining ring. The first threaded retaining ring and the second threaded retaining ring have opposite threading directions on the spline tube, and in the threaded state, the first threaded retaining ring and the second threaded retaining ring are stacked and extruded.

[0012] Furthermore, at least one retaining ring protrusion is provided on the outer periphery of the first threaded retaining ring abutting against the driving gear.

[0013] Beneficial effect: The utility model realizes axial limitation by axially clamping the driving gear on the spline tube through the movable limiting part and the fixed limiting part. Compared with the conventional clamping ring limitation, under the meshing condition where the driving gear moves forward and rubs and collides with the flywheel, the movable limiting part and the fixed limiting part are not easy to fall off the tube, thereby making the assembly of the driving gear on the spline tube more stable, improving the stability of the assembly of the driving gear and the spline tube, and ensuring the normal operation and safety of the starter one-way device. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0015] Figure 2 It is a schematic diagram of the structure decomposition of the utility model;

[0016] Figure 3 for Figure 1 Schematic diagram of the half-section structure. DETAILED DESCRIPTION

[0017] The utility model is further described below in conjunction with the accompanying drawings.

[0018] like Figure 1 , Figure 2 as well as Figure 3As shown, the axial assembly limiting structure of the spline tube and gear of the one-way device includes a driving gear 1 and a spline tube 2 which are coaxially arranged through key teeth meshing, and the driving gear 1 and the spline tube 2 are circumferentially limited by the key teeth meshing; the spline tube 2 is provided with a fixed limiting part 3 and a movable limiting part 4 on the axially spaced spline teeth 20, and the movable limiting part 4 axially feeds and presses the driving gear 1 on the spline tube 2 against the fixed limiting part 3, so that the movable limiting part 4 cooperates with the fixed limiting part 3 to axially clamp the driving gear 1. The utility model realizes axial limiting by axially clamping the driving gear 1 on the spline tube 2 through the movable limiting part 4 and the fixed limiting part 3. Compared with the conventional clamping ring limiting, under the meshing working condition where the driving gear 1 moves forward and rubs and collides with the flywheel, the movable limiting part 4 and the fixed limiting part 3 are not easy to fall off the tube, so that the driving gear 1 is more stably assembled on the spline tube 2, the stability of the assembly of the driving gear 1 and the spline tube 2 is improved, and the normal operation and operation safety of the starter one-way device are ensured.

[0019] More specifically, Figure 2 or Figure 3 As shown, the fixed limiting portion 3 is located at the inner end side of the spline teeth 20 of the spline tube 2 , and the movable limiting portion 4 is located at the outer end side of the spline teeth 20 of the spline tube 2 .

[0020] In order to ensure the uniformity of the axial limiting blocking point of the fixed limiting part 3 on the driving gear 1, as shown in FIG. Figure 2 As shown, there are a plurality of fixed limiting portions 3 , and the plurality of fixed limiting portions 3 are distributed in a circumferential array along the circumference of the spline tube 2 .

[0021] like Figure 3 As shown, the fixed limit portion 3 is a raised structure integrally formed with the spline tube 2 and protruding from the tube surface, thereby enhancing the structural strength and stability of the fixed limit portion 3 on the spline tube 2, and the inner shaft end face of the driving gear 1 abuts against the raised structure.

[0022] like Figure 2 and Figure 3 As shown, in the present invention, as a preferred embodiment, the movable stopper 4 is threadedly matched with the spline tube 2, and the assembly is more convenient and quick when the threads are threadedly matched. The movable stopper 4 includes a threaded retaining ring, and the spline tube 2 is provided with a threaded portion corresponding to the threaded retaining ring. The threaded retaining ring is screwed into the spline tube 2 in cooperation with the threaded portion to axially squeeze the drive gear 1.

[0023] More specifically, the threaded retaining rings, the first threaded retaining ring 41 and the second threaded retaining ring 42, the threaded portion on the spline tube 2 includes an inner threaded portion 21 corresponding to the first threaded retaining ring 41 and an outer threaded portion 22 corresponding to the second threaded retaining ring 42, the first threaded retaining ring 41 and the second threaded retaining ring 42 have opposite directions of thread screwing in and thread screwing out on the spline tube 2, and in the thread screwing in state, the first threaded retaining ring 41 and the second threaded retaining ring 42 are stacked and extruded. During assembly, the first threaded retaining ring 41 and the second threaded retaining ring 42 have opposite directions of thread screwing in, thereby improving the installation stability of the first threaded retaining ring 41 and the second threaded retaining ring 42 stacked and extruded, so that the two retaining rings are not easily loosened due to the vibration caused by the friction and collision between the driving gear 1 and the flywheel, and the axial limit stability of the driving gear 1 is higher.

[0024] In order to further ensure the stable effect of the threaded retaining ring on the axial limiting of the driving gear 1, in the utility model, at least one retaining ring protrusion 4a is provided on the outer periphery of the first threaded retaining ring 41 against the driving gear 1, the retaining ring protrusion 4a extends radially relative to the first threaded retaining ring 41, and the retaining ring protrusion 4a and the first threaded retaining ring 41 are integrally formed.

[0025] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principle of the present invention. These improvements and modifications should also be regarded as the protection scope of the present invention.

Claims

1. A spline tube and gear axial assembly limiting structure of a one-way gear, comprising a driving gear (1) and a spline tube (2) arranged on the same axis through key teeth meshing, and the driving gear (1) and the spline tube (2) are circumferentially limited through key teeth meshing; Features: Axially spaced spline teeth (20) on the spline tube (2) are provided with a fixed limiting portion (3) and a movable limiting portion (4); the movable limiting portion (4) is axially fed on the spline tube (2) to press the driving gear (1) against the fixed limiting portion (3), so that the movable limiting portion (4) cooperates with the fixed limiting portion (3) to axially clamp the driving gear (1).

2. The axial assembly limiting structure of the spline tube and gear of the one-way clutch according to claim 1 is characterized in that: The fixed limiting portion (3) is located on the inner end side of the spline teeth (20) of the spline tube (2), and the movable limiting portion (4) is located on the outer end side of the spline teeth (20) of the spline tube (2).

3. The axial assembly limiting structure of the spline tube and gear of the one-way clutch according to claim 1 is characterized in that: The number of the fixed limiting portions (3) is a plurality, and the plurality of fixed limiting portions (3) are distributed in a circumferential array along the circumference of the spline tube (2).

4. The axial assembly limiting structure of the spline tube and gear of the one-way clutch according to claim 1 is characterized in that: The fixed limiting portion (3) is a raised structure that is integrally formed with the spline tube (2) and protrudes from the tube surface, and the inner shaft end surface of the driving gear (1) abuts against the raised structure.

5. The axial assembly limiting structure of the spline tube and gear of the one-way device according to claim 1 is characterized in that: The movable limiting portion (4) is movably matched with the thread of the spline tube (2).

6. The axial assembly limiting structure of the spline tube and gear of the one-way device according to claim 5 is characterized in that: The movable limiting portion (4) comprises a threaded retaining ring, the spline tube (2) is provided with a threaded portion corresponding to the threaded retaining ring, and the threaded retaining ring cooperates with the threaded portion to be screwed onto the spline tube (2) to axially press the drive gear (1).

7. The axial assembly limiting structure of the spline tube and gear of the one-way device according to claim 6 is characterized in that: The threaded retaining ring comprises a first threaded retaining ring (41) and a second threaded retaining ring (42); the threaded portion on the spline tube (2) comprises an inner threaded portion (21) corresponding to the first threaded retaining ring (41) and an outer threaded portion (22) corresponding to the second threaded retaining ring (42); the first threaded retaining ring (41) and the second threaded retaining ring (42) have opposite screw-in and screw-out directions on the spline tube (2); and in the screw-in state, the first threaded retaining ring (41) and the second threaded retaining ring (42) are stacked and extruded.

8. The axial assembly limiting structure of the spline tube and gear of the one-way device according to claim 7 is characterized in that: At least one retaining ring protrusion (4a) is arranged on the outer periphery of the first thread retaining ring (41) abutting against the driving gear (1).

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