One-way valve with spring protection

Abstract

This utility model discloses a one-way clutch with spring protection, including a clutch, a drive shaft, a gear, a spring limit seat, and a tower-shaped spring. Rollers and an integrally formed double roller spring are installed in the wedge-shaped groove of the clutch outer ring to prevent jamming caused by drive shaft oscillation; the gear achieves buffered engagement through the tower-shaped spring and the limit groove. This design effectively reduces the risk of gear damage and improves the reliability of the clutch operation.

Description

Technical Field

[0001] This utility model relates to a component on an automobile starter, specifically a one-way valve with spring protection, used to alleviate gear meshing impact and prevent clutch jamming. Background Technology

[0002] Traditional starter one-way clutches are prone to gear damage due to rigid impact when engaging with the flywheel on the engine. In existing technology, the one-way clutch wedge groove typically uses a single roller and single spring structure. The small contact area between the single spring and the roller makes the clutch prone to jamming due to roller tilting when the drive shaft oscillates, resulting in the clutch failing to disengage force after the engine starts and thus being damaged. Therefore, it cannot adapt to the oscillating conditions of the drive shaft, and the gear buffer space is insufficient. Utility Model Content

[0003] To address the aforementioned problems, the purpose of this utility model is to provide a one-way valve with spring protection, which uses a tower-shaped spring to achieve gear meshing buffering and uses rollers and an integrally molded spring to solve the clutch jamming problem.

[0004] To achieve the above objectives, this utility model provides the following technical solution: a one-way valve with spring protection, belonging to automotive starter motor components, comprising:

[0005] The clutch has an outer ring inside, and the inner wall of the outer ring is evenly distributed with wedge-shaped grooves.

[0006] A drive shaft has one end located in the center hole of the clutch. A copper sleeve is connected to the drive shaft, and the copper sleeve fits tightly against the rollers, serving to lubricate and reduce friction. This not only extends the service life of the rollers but also improves the transmission efficiency of the clutch.

[0007] The gear is slidably fitted onto the drive shaft;

[0008] A spring limiting seat is sleeved between the clutch and the gear, and a limiting groove is provided on the side near the gear.

[0009] A tower-shaped spring, one end of which is embedded in the limiting groove, and the other end of which contacts the gear;

[0010] A retaining ring is fixed to the end of the drive shaft to prevent the gear from sliding out of the drive shaft;

[0011] The wedge-shaped groove is provided with a roller and two roller springs corresponding to the roller. The two roller springs are integrally formed, have a square spiral structure, and their length is adapted to the height of the corresponding roller.

[0012] The compressed height of the tower-shaped spring is 1.5 to 2 times the outer diameter of its spring wire.

[0013] The depth of the limiting groove is 1 / 3 to 1 / 2 of the diameter of the tower spring.

[0014] A guide flange 301 is provided between the gear and the spring limiting seat to maintain the axial stability of the gear during sliding.

[0015] The beneficial effects of this utility model are:

[0016] 1. Tower-shaped springs provide greater compression space, enabling flexible meshing between gears and flywheels and reducing the risk of gear damage;

[0017] 2. The roller and integrated double spring design prevents the rollers from jamming when the drive shaft swings, ensuring reliable clutch disengagement;

[0018] 3. The structure is compact and compatible with existing starters, reducing improvement costs.

[0019] The present invention will be further described below with reference to the accompanying drawings and specific embodiments. Attached Figure Description

[0020] Figure 1 This is a structural diagram of a specific embodiment of the present utility model;

[0021] Figure 2 for Figure 1 Enlarged view of AA;

[0022] Figure 3 This is a schematic diagram of the structure of the roller spring in a specific embodiment of this utility model.

[0023] In the diagram, 1 is the clutch; 2 is the drive shaft; 3 is the gear; 4 is the spring limit seat; 5 is the tower spring; 6 is the limit circlip; 7 is the copper sleeve; 101 is the outer ring; 102 is the wedge groove; 103 is the roller; 104 is the roller spring; 401 is the limit groove; 301 is the guide flange; 1021 is the inclined plane; and 1022 is the vertical plane. Detailed Implementation

[0024] The present invention will be described in detail below through embodiments, which are only used to further illustrate the present invention and should not be construed as limiting the scope of protection of the present invention.

[0025] like Figure 1 — Figure 3 As shown, this embodiment discloses a one-way valve with spring protection, belonging to automotive starter motor components, including:

[0026] The clutch 1 has an outer ring 101 inside, and the inner wall of the outer ring 101 is evenly distributed with wedge-shaped grooves 102;

[0027] The drive shaft 2 has one end located in the center hole of the clutch 1. A copper sleeve 7 is connected to the drive shaft 2, and the copper sleeve 7 fits tightly against the rollers. The copper sleeve 7 serves to lubricate and reduce friction. This not only extends the service life of the rollers but also improves the transmission efficiency of the clutch.

[0028] Gear 3 is slidably fitted onto drive shaft 2;

[0029] A spring limiting seat 4 is sleeved between the clutch 1 and the gear 3, and a limiting groove 401 is provided on the side of the spring limiting seat 4 closest to the gear 3.

[0030] The tower-shaped spring 5 has one end embedded in the limiting groove 401 and the other end in contact with the gear 3;

[0031] The limiting ring 6 is fixed to the end of the drive shaft 2 and is used to prevent the gear 3 from sliding out of the drive shaft 2;

[0032] The wedge-shaped groove 102 is provided with rollers 103 and two roller springs 104 corresponding to each roller. The two roller springs 104 are integrally formed, have a square spiral structure, and their length is adapted to the height of the corresponding rollers 103.

[0033] The height of the tower-shaped spring 5 after compression is 1.5 to 2 times the outer diameter of its spring wire.

[0034] The depth of the limiting groove 401 is 1 / 3 to 1 / 2 of the diameter of the tower spring 5. This makes the positioning of the tower spring more reliable and ensures that the compression stroke of the elastic spring is maximized.

[0035] The copper sleeve 7 is provided with a guide flange 301, which is used to maintain the axial stability of the gear 3 during sliding.

[0036] Since each wedge groove 102 is equipped with a roller, the roller can roll radially within the wedge groove 102; the front and rear ends of the roller 103 are both in contact with roller springs 104, which increases the contact area. When subjected to uneven force or vibration, the tilt angle is small, which can prevent the drive shaft from reversing and jamming. The end of each roller spring 104 contacts the front or rear end of the corresponding roller, pushing the roller 103 to the left limit position of the wedge groove 102. When the roller 103 is at the left limit position, part of the roller will be placed outside the wedge groove. In this way, the outer ring rotates in the forward direction and drives the drive shaft to rotate through friction. When rotating in the reverse direction, the roller is compressed by the reverse friction force and retracts into the wedge groove, disengaging from the force contact with the drive shaft and releasing the power transmission.

[0037] The left side wall of the wedge groove 102 is an inclined surface 1021, and the right side wall is a vertical surface 1022. One end of the roller spring abuts against the vertical surface 1022, and the other end contacts the roller 103, causing the roller 103 to roll to the highest point of the inclined surface. When the roller 103 rotates in the forward direction, it is squeezed by the inclined surface to generate radial clamping force. When it rotates in the reverse direction, it slides along the inclined surface 1021 to release the pressure and cut off the transmission.

[0038] The roller spring 104 has a one-piece molded structure, which enhances its fatigue resistance.

[0039] The inner wall of the outer ring is coated with a tungsten carbide wear-resistant layer to extend its service life.

[0040] After adopting the above technical solution

[0041] 1. Tower-shaped springs provide greater compression space, enabling flexible meshing between gears and flywheels and reducing the risk of gear damage;

[0042] 2. The roller and integrated double spring design prevents the rollers from jamming when the drive shaft swings, ensuring reliable clutch disengagement;

[0043] 3. The structure is compact and compatible with existing starters, reducing improvement costs.

[0044] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. It will be apparent to those skilled in the art that this utility model is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or basic characteristics of this utility model. Therefore, the embodiments should be considered exemplary and non-limiting in all respects. The scope of this utility model is defined by the appended claims rather than the foregoing description, and thus all variations falling within the meaning and scope of equivalents of the claims are intended to be included within this utility model. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0045] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A one-way valve with spring protection, characterized in that, include: The clutch (1) has an outer ring (101) inside, and the inner wall of the outer ring (101) is evenly distributed with wedge-shaped grooves (102). A drive shaft (2) has one end located in the middle hole of the clutch (1), and a copper sleeve is connected to the drive shaft, which fits tightly against the roller. Gear (3) is slidably fitted onto the drive shaft (2); A spring limiting seat (4) is sleeved between the clutch (1) and the gear (3), and a limiting groove (401) is provided on the side of the spring limiting seat (401) near the gear (3). A tower-shaped spring (5) has one end embedded in the limiting groove (401) and the other end in contact with the gear (3); A retaining ring (6) is fixed to the end of the drive shaft (2) to restrict the gear (3) from sliding out of the drive shaft (2). The wedge-shaped groove (102) is provided with a roller (103) and two roller springs (104) corresponding to the roller. The two roller springs (104) are integrally formed, have a square spiral structure, and their length is adapted to the height of the corresponding roller (103).

2. The one-way valve with spring protection according to claim 1, characterized in that, The height of the tower-shaped spring (5) after compression is 1.5 to 2 times the outer diameter of its spring wire.

3. The one-way valve with spring protection according to claim 1, characterized in that, The depth of the limiting groove (401) is 1 / 3 to 1 / 2 of the diameter of the tower spring (5).

4. The one-way valve with spring protection according to claim 1, characterized in that, A guide flange (301) is provided between the gear (3) and the spring limit seat (4) to maintain the axial stability of the gear (3) during sliding.

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