A radial floating self-aligning starter one-way valve

Abstract

This utility model discloses a radially floating self-aligning starter one-way device, including a spline tube and a drive gear coaxially assembled via inner and outer splines. The rear end of the drive gear is spring-loaded by an internal spring, and the front end is limited by a retaining ring. A radial spring is embedded circumferentially in the spline tube, and the radial spring is radially movable against the spline tube wall by its own elasticity. The protruding end of the radial spring supports the inner wall of the drive gear, so that the drive gear maintains dynamic alignment with the spline tube under normal conditions, and a radial micro-gap is formed between the inner and outer spline meshing surfaces. This utility model compensates for the radial alignment deviation between the drive gear and the flywheel through dynamic self-alignment of the radial spring, reduces spline wear, and extends the life of the one-way device.

Description

Technical Field

[0001] This utility model belongs to the technical field of starter one-way devices, and particularly relates to a radial floating self-aligning starter one-way device. Background Technology

[0002] In an automotive starter one-way clutch, the drive gear transmits torque through a spline tube and moves axially to mesh with the flywheel under the action of a shift fork. Existing technology relies on precision machining to ensure the spline fit clearance, but in actual operation, manufacturing tolerances, assembly errors, or flywheel runout can lead to uneven radial force on the drive gear. The spline meshing surface is constantly under forced alignment, resulting in localized stress concentration and dry friction, accelerating wear and even causing jamming. Although existing technologies include axial floating structures such as spring buffers, the lack of radial freedom prevents the gear from adaptively compensating for radial deviations. This is especially problematic under high-frequency start-stop conditions, where spline wear becomes significant, shortening the one-way clutch's lifespan. Summary of the Invention

[0003] Purpose of the invention: In order to overcome the shortcomings of the existing technology, this utility model provides a radial floating self-aligning starter one-way device, which dynamically aligns itself through a radial spring, compensates for the radial alignment deviation between the drive gear and the flywheel, reduces spline wear, and extends the life of the one-way device.

[0004] Technical solution: To achieve the above objectives, the present invention provides a radial floating self-aligning starter one-way device, comprising a spline tube and a drive gear coaxially assembled via inner and outer splines, wherein the rear end of the drive gear is spring-loaded by a built-in spring and the front end is limited by a locking limit ring.

[0005] The spline tube is fitted with a radial spring ejector along its circumference. The radial spring ejector is radially movable on the tube wall of the spline tube by its own elastic force.

[0006] The extended end of the radial spring pusher supports the inner wall of the drive gear, so that the drive gear is dynamically aligned with the spline tube under normal conditions, and a radial micro-gap is formed between the inner and outer spline meshing surfaces.

[0007] Furthermore, the radial spring ejector includes a radial push rod, and the spline tube is provided with a radial hole for mounting the radial push rod;

[0008] The inner end of the radial push rod is an elastic source, and the outer end is a rolling support. The elastic source drives the rolling support to contact the inner wall of the drive gear.

[0009] Furthermore, the rolling top support is a rolling ball embedded in the outer end of the radial top rod.

[0010] Furthermore, the elastic source includes an elastic body connected to the inner end of the radial push rod.

[0011] Furthermore, the inner wall of the spline tube is provided with a threaded hole communicating with the radial hole, and a threaded plug is used to fix and connect the elastic body.

[0012] The radial spring ejector is installed on the wall of the splined tube by screwing a threaded plug into a threaded hole.

[0013] Furthermore, the end of the threaded plug is provided with an internal hexagonal mounting hole.

[0014] Furthermore, a hidden hole is provided inside the threaded hole, and the plug head of the threaded plug is accommodated in the hidden hole.

[0015] Furthermore, the radial ejector is evenly distributed in at least one ring around the circumference of the spline tube.

[0016] Beneficial effects: The one-way device of this utility model dynamically supports the inner wall of the drive gear through a radial spring, forming a radial micro-gap between the inner and outer spline meshing surfaces, so that the drive gear maintains dynamic alignment under normal conditions. This structural design can adaptively compensate for radial alignment deviations during flywheel meshing, and eliminate stress concentration and dry friction caused by forced spline alignment. Combined with the rolling support, sliding friction is converted into rolling friction, which significantly reduces the axial movement resistance of the drive gear and spline wear. At the same time, the spring and the radial spring work together to balance axial movement flexibility and radial working stability, improve system reliability, and extend the service life of the one-way device. Attached Figure Description

[0017] Figure 1 This is a half-section diagram of the spline tube and drive gear of the one-way valve after assembly.

[0018] Figure 2 for Figure 1 Enlarged structural diagram of region A in the middle;

[0019] Figure 3 This is a schematic diagram of the cross-sectional structure of the spline tube and the drive gear. Detailed Implementation

[0020] The present invention will be further described below with reference to the accompanying drawings.

[0021] like Figure 1 and Figure 3As shown, a radially floating self-aligning starter one-way device includes a spline tube 1 and a drive gear 2 coaxially assembled via inner and outer splines. The rear end of the drive gear 2 is spring-loaded by an internal spring 3, and the front end is limited by a retaining ring 4. A radial spring 5 is embedded circumferentially in the spline tube 1. The radial spring 5 is radially movable against the wall of the spline tube 1 by its own elastic force. The protruding end of the radial spring 5 supports the inner wall of the drive gear 2, so that the drive gear 2 and the spline tube 1 maintain dynamic alignment under normal conditions, and a radial micro-gap a is formed between the inner and outer spline meshing surfaces. Specifically, the radial spring 5 radially lifts the inner wall of the drive gear 2 by its elastic force, so that the two are dynamically aligned under normal conditions; the micro-gap a between the inner and outer spline meshing surfaces allows the drive gear 2 to float slightly radially, compensating for alignment deviations when meshing with the flywheel; the spring 3 and the retaining ring 4 maintain axial freedom, realizing coordinated control of radial floating and axial movement, and reducing frictional wear caused by forced spline alignment.

[0022] like Figure 2 As shown, the radial pusher 5 includes a radial push rod 51, and the spline tube 1 has a radial hole 11 for mounting the radial push rod 51. The inner end of the radial push rod 51 is a spring source, and the outer end is a rolling support. The spring source drives the rolling support to contact the inner wall of the drive gear 2. The spring source at the inner end of the radial push rod 51 provides a continuous radial thrust, driving the rolling support at the outer end to contact the inner wall of the gear. The radial hole 11 constrains the movement trajectory of the radial push rod 51, ensuring that the thrust direction is perpendicular to the inner wall of the drive gear 2.

[0023] In a preferred embodiment, the rolling support is a ball 52 embedded in the outer end of the radial push rod 51. The ball 52 converts sliding friction into rolling friction, reducing the resistance when the drive gear 2 moves axially. When the drive gear 2 is subjected to radial off-center load, the ball 52 rolls adaptively, preventing the radial push rod 51 from scraping against the inner wall of the drive gear 2 and extending its service life.

[0024] The elastic source includes an elastic body 53 connected to the inner end of the radial push rod 51. The elastic body 53 (such as a coil spring) is connected to the inner end of the push rod and provides linear elastic force. The elastic force is adjustable: by replacing the elastic body with one of different stiffness, it can be adapted to the floating requirements of different working conditions.

[0025] In this invention, the radial micro-gap 'a' is preferably 0.08 mm to 0.15 mm. This range must satisfy the following:

[0026] 1) The cumulative machining error of the internal and external spline tooth surfaces is greater than 0.05mm, ensuring tooth surface separation under normal conditions;

[0027] 2) The radial assembly clearance between the drive gear 2 and the spline tube 1 should be less than 0.2mm to prevent excessive floating.

[0028] 3) The typical radial deviation of the cover flywheel engagement (≤0.1mm) and the displacement of the radial push rod 51 is within the linear compression range of the elastic body 53.

[0029] For example, when a = 0.1 mm, the radial push rod 51 retracts by about 0.1 mm, corresponding to the compression of the elastic body 53 within its elastic deformation threshold, ensuring the reset response speed.

[0030] The inner wall of the spline tube 1 is provided with a threaded hole 12 communicating with the radial hole 11, and a threaded plug 54 is fixedly connected to the elastic body 53; the radial spring ejector 5 is installed on the tube wall of the spline tube 1 by screwing the threaded plug 54 into the threaded hole 12. The threaded plug 54 is screwed into the threaded hole 12 to press the elastic body 53, realizing the modular installation of the spring ejector. Installation from the inside of the spline tube 1 avoids interference with external structures, and the threaded connection ensures that the preload force is controllable and prevents the spring ejector from falling off.

[0031] The threaded plug 54 has an internal hexagonal mounting hole 540 at its end, which allows for quick installation and removal of the threaded plug 54 with standard tools, facilitating maintenance or replacement of the elastomer 53.

[0032] The threaded hole 12 is provided with a hidden hole 13 inside, and the plug head 55 of the threaded plug 54 is accommodated in the hidden hole 13, so that the end face of the threaded plug 54 is flush with the inner wall of the spline tube 1, eliminating the internal protrusion, avoiding interference with the transmission part, and preventing collision damage.

[0033] The radial springs 5 ​​are evenly distributed around the spline tube 1 in at least one ring. The evenly distributed radial springs 5 ​​form a uniform radial support force field, ensuring that the drive gear 2 floats consistently in all directions and preventing jamming caused by single-point off-center loading.

[0034] The advantages of this utility model are as follows: The one-way device dynamically supports the inner wall of the drive gear 2 through the radial spring jack 5, forming a radial micro-gap 'a' between the inner and outer spline meshing surfaces, so that the drive gear 2 maintains dynamic alignment under normal conditions. This structural design can adaptively compensate for the radial alignment deviation when the flywheel meshes, and eliminate stress concentration and dry friction caused by forced spline alignment. Combined with the rolling support part, sliding friction is converted into rolling friction, which significantly reduces the axial movement resistance of the drive gear 2 and spline wear. At the same time, the spring 3 and the radial spring jack 5 work together to balance axial movement flexibility and radial working stability, improve system reliability, and extend the service life of the one-way device.

[0035] The above description is only a preferred embodiment of the present utility model. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the principle of the present utility model, and these improvements and modifications should also be considered within the protection scope of the present utility model.

Claims

1. A radial floating self-aligning starter one-way device, comprising a spline tube (1) and a drive gear (2) coaxially assembled by inner and outer splines, wherein the rear end of the drive gear (2) is pushed up by a built-in spring (3) and the front end is limited by a snap-fit ​​limit ring (4); Its features are: The spline tube (1) is fitted with a radial spring ejector (5) along its circumference. The radial spring ejector (5) is radially movable on the tube wall of the spline tube (1) by its own elastic force. The extended end of the radial spring (5) pushes against the inner wall of the drive gear (2), so that the drive gear (2) is dynamically aligned with the spline tube (1) under normal conditions, and a radial micro gap (a) is formed between the inner and outer spline meshing surfaces.

2. The radial floating self-aligning starter one-way valve according to claim 1, characterized in that: The radial spring ejector (5) includes a radial push rod (51), and the spline tube (1) is provided with a radial hole (11) for mounting the radial push rod (51). The inner end of the radial push rod (51) is an elastic source, and the outer end is a rolling support. The rolling support is driven by the elastic source to contact the inner wall of the drive gear (2).

3. A radial floating self-aligning starter one-way valve according to claim 2, characterized in that: The rolling support is a ball (52) embedded in the outer end of the radial push rod (51).

4. A radial floating self-aligning starter one-way valve according to claim 2 or 3, characterized in that: The elastic source includes an elastic body (53) connected to the inner end of the radial push rod (51).

5. A radial floating self-aligning starter one-way valve according to claim 4, characterized in that: The inner wall of the spline tube (1) is provided with a threaded hole (12) communicating with the radial hole (11), and a threaded plug (54) is fixedly connected to the elastic body (53). The radial spring ejector (5) is installed on the wall of the spline tube (1) by screwing the threaded plug (54) into the threaded hole (12).

6. A radially floating self-aligning starter one-way valve according to claim 5, characterized in that: The threaded plug (54) has an internal hexagonal mounting hole (540) at its end.

7. A radial floating self-aligning starter one-way valve according to claim 5, characterized in that: The threaded hole (12) has a hidden hole (13) inside, and the plug head (55) of the threaded plug (54) is accommodated in the hidden hole (13).

8. A radial floating self-aligning starter one-way valve according to claim 1, characterized in that: The radial ejector (5) is evenly distributed in at least one ring around the spline tube (1).

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