Clutch one-way valve device
By setting a check valve device on the clutch piston and automatically closing the channel with centrifugal force, the error operation of the hydraulic clutch and friction plate wear problems during high-speed rotation are solved, and the stable operation of the clutch is achieved.
Patent Information
- Application Number
- CN202422726291.4
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-11-08
- Publication Date
- 2025-08-29
- Estimated Expiration
- 2034-11-08
AI Technical Summary
Existing hydraulic clutches are prone to problems such as misoperation and abnormal wear of friction plates when rotating at high speed.
A check valve device is provided on the clutch piston, including a channel and a check valve. The channel penetrates the piston and connects to the oil supply oil circuit and the clutch pressure plate. The check valve is composed of a valve sleeve and a valve ball. The channel is automatically closed when rotating at high speed by centrifugal force to prevent hydraulic oil from gathering to form pressure.
It effectively prevents the clutch from misoperating and abnormal wear of the friction plate, and automatically adjusts the channel state through centrifugal force to ensure the normal operation of the clutch.
Smart Images
Figure CN223282425U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the field of clutches, in particular to a clutch one-way valve device. Background Art
[0002] The basic operating principle of a friction clutch is to push the pressure plate to compress the friction plates. When the transmission is engaged, the release spring pushes the pressure plate back, disengaging the clutch. Currently, a hydraulic mechanism is commonly used to push the pressure plate to compress the friction plates. Because the hydraulic mechanism's pistons are arranged in a ring along the pressure plate, centrifugal force causes hydraulic oil to accumulate outward during high-speed clutch rotation, generating a certain amount of pressure. This can cause clutch misoperation and abnormal wear of the friction plates. Utility Model Content
[0003] In order to solve the problem that the existing hydraulic clutch is prone to misoperation and abnormal wear, the utility model provides a clutch one-way valve device that solves the above problems.
[0004] A clutch one-way valve device is provided on the piston of the clutch, and the two ends of the piston are respectively facing the oil supply circuit and the clutch pressure plate, including a channel and a one-way valve. The channel runs through the piston and connects the oil supply circuit and the clutch pressure plate, and the one-way valve is provided in the channel; the one-way valve includes a valve sleeve and a valve ball provided in the valve sleeve, the valve sleeve is a cylindrical structure, the axial direction is parallel to the axial direction of the clutch, the inner diameter is larger than the diameter of the valve ball, the two ends of the valve sleeve are closed, and the diameter of the mouth is smaller than the diameter of the valve ball.
[0005] In a preferred embodiment of the clutch one-way valve device provided by the present invention, the channel is provided on a side of the piston away from the clutch axis.
[0006] In a preferred embodiment of the clutch one-way valve device provided by the present invention, the channel includes two coarse and thin sections arranged coaxially, the section of the channel close to the oil supply circuit is recorded as the coarse section, and the section close to the clutch pressure plate is recorded as the thin section, and the diameter and length of the coarse section are both larger than the diameter and length of the thin section.
[0007] In a preferred embodiment of the clutch one-way valve device provided by the present invention, the one-way valve is arranged in the thick section, the one-way valve is interference fit with the inner wall of the thick section, and both ends of the one-way valve are aligned with both ends of the thick section.
[0008] In a preferred embodiment of the clutch one-way valve device provided by the present invention, the valve sleeve includes a first valve sleeve and a second valve sleeve, both of which are cylindrical structures, with consistent inner and outer diameters, and the inner diameters are both larger than the valve ball diameter. Both are interference fit with the inner wall of the thick section, and the axial direction is parallel to the axial direction of the clutch, the proximal ends are aligned with each other, and the distal ends are aligned with the two ends of the thick section.
[0009] In a preferred embodiment of the clutch one-way valve device provided by the present invention, the edges of one end of the first valve sleeve and the second valve sleeve close to the clutch pressure plate are chamfered.
[0010] The inner cavity of the first valve sleeve is closed at one end close to the clutch pressure plate, which is recorded as the first port. The diameter of the port is less than or equal to the diameter of the thin section and smaller than the diameter of the valve ball.
[0011] The inner cavity of the second valve sleeve is closed at one end close to the oil supply line, which is recorded as the second port. The diameter of the port is greater than or equal to the diameter of the thin section and smaller than the diameter of the valve ball.
[0012] Compared with the prior art, the clutch one-way valve device provided by the present invention has the following beneficial effects:
[0013] 1. The utility model sets an oil-passing cavity on the outside of the clutch piston. When the hydraulic oil gathers outward under the action of centrifugal force, the hydraulic oil will naturally pass through the cavity without forming pressure to push the piston to move and cause malfunction of the clutch.
[0014] 2. The utility model sets a steel ball in the oil cavity. When the oil pressure is applied to the piston, the steel ball will be automatically pushed to close the cavity without affecting the normal movement of the piston.
[0015] 3. The utility model adopts two valve sleeves to form a cavity for accommodating the steel ball. The split structure is easy to install. The structure with closed ends at both ends prevents the steel ball from slipping out.
[0016] 4. In the utility model, the steel balls are moved away by the centrifugal force during the rotation of the clutch, so that the cavities are connected. No spring is required, and the target function is achieved simply and efficiently. BRIEF DESCRIPTION OF THE DRAWINGS
[0017] Figure 1 It is a schematic structural diagram of a clutch one-way valve device;
[0018] Figure 2 yes Figure 1 Enlarged view of the one-way valve position;
[0019] Figure 3 is an exploded view of the piston and check valve.
[0020] Numbers in the figure:
[0021] Clutch 1, piston 2, oil supply channel 4, friction plate 11, driven plate 12, release spring 13, sealing ring 21, first valve sleeve 31, second valve sleeve 32, valve ball 33. DETAILED DESCRIPTION
[0022] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.
[0023] Please also see Figures 1 to 3 , which are respectively a structural schematic diagram of the clutch one-way valve device provided by the present invention, an enlarged view of the clutch one-way valve device at the one-way valve position, and an exploded view of the piston and the one-way valve in the clutch one-way valve device.
[0024] The clutch check valve assembly is housed in piston 2 of clutch 1. The left end of piston 2 abuts the cylinder body and features a groove for hydraulic oil to enter and provide thrust. The cylinder body is notched on the clutch 1 axis side and connected to oil supply line 4. The right end of piston 2 is bifurcated: one contacting the friction plate 11 and driven plate 12, and the other contacting the release spring 13. Another groove is located on the outer side of piston 2, near the left end, for a sealing ring 21.
[0025] A circular channel runs horizontally through the piston 2 on the side away from the clutch 1 axis. The channel is located in a groove at the left end of the piston 2. The channel's axis is parallel to the axis of the clutch 1 and consists of two coaxially arranged sections: the left section is the thick section, with a diameter of 9 mm and a length of 8.5 mm, and the right section is the thin section, with a diameter of 4 mm and a length of 2 mm.
[0026] A one-way valve is provided in the left half of the channel. The one-way valve includes a first valve sleeve 31 , a second valve sleeve 32 and a valve ball 33 .
[0027] The first valve sleeve 31 is a cylindrical structure with an outer diameter of 9 mm and an inner diameter of 6 mm. The structure of the left end of the inner cavity remains unchanged, while the right end tapers at a 45° angle, forming a mouth with a diameter of 3.5 mm and an axial length of 2 mm. The axial length of the left end is 0.75 mm, while the axial length of the tapered structure is 1.25 mm. The outer edge of the right end of the first valve sleeve 31 is chamfered to facilitate insertion into the channel.
[0028] The second valve sleeve 32 is cylindrical with an outer diameter of 9 mm and an inner diameter of 6 mm. The structure of the right end of the inner cavity remains unchanged, while the left end tapers at a 45° angle, forming a mouth with a diameter of 4.8 mm and an axial length of 0.4 mm. The axial length of the right end is 3.5 mm, and the axial length of the tapered structure is 0.6 mm. The outer edge of the right end of the second valve sleeve 32 is chamfered to facilitate insertion into the channel.
[0029] The valve ball 33 is a steel ball with a diameter of 5 mm.
[0030] The first and second valve sleeves 31, 32 are made of the same material as the piston 2, are coaxially arranged with the passage, and are installed with an interference fit. After installation, the right end of the first valve sleeve 31 and the proximal end of the second valve sleeve 32 are aligned, and the distal ends are aligned with the two ends of the left half of the passage, forming a cavity with a thick center and narrow ends. The valve ball 33 rolls freely within the cavity.
[0031] During use:
[0032] To engage clutch 1, hydraulic oil is pumped through supply line 4 into the groove at the left end of piston 2 and into the cavity formed by first and second valve sleeves 31, 32. This pushes valve ball 33 rightward, where it abuts against the tapered structure of first valve sleeve 31, sealing the cavity. The hydraulic oil then pushes piston 2 rightward, compressing friction plate 11 and engaging clutch 1.
[0033] When clutch 1 is no longer engaged, the hydraulic pump stops applying pressure, and piston 2 moves leftward under the action of release spring 13. During high-speed rotation of clutch 1, centrifugal force forces valve ball 33 against the sidewalls of the cavity, keeping the cavity open. Centrifugal force allows any hydraulic oil that accumulates outside the cavity to flow out naturally, without building up pressure.
[0034] The above description is merely an embodiment of the present invention and does not limit the patent scope of the present invention. Any equivalent structure or equivalent process transformation made using the contents of the present invention specification, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present invention.
Claims
1. A clutch one-way valve device, provided on a clutch piston, with the two ends of the piston facing the oil supply line and the clutch pressure plate, respectively, characterized in that: It includes a channel and a one-way valve. The channel runs through the piston and connects the oil supply circuit and the clutch pressure plate. The one-way valve is provided in the channel. The one-way valve includes a valve sleeve and a valve ball provided in the valve sleeve. The valve sleeve is a cylindrical structure, the axial direction of which is parallel to the axial direction of the clutch, and the inner diameter is larger than the diameter of the valve ball. The two ends of the valve sleeve are closed, and the diameter of the mouth is smaller than the diameter of the valve ball.
2. The clutch one-way valve device according to claim 1, characterized in that: The channel is arranged on a side of the piston away from the clutch axis.
3. The clutch one-way valve device according to claim 1 or 2, characterized in that: The channel includes two coaxially arranged thick and thin sections. The section of the channel close to the oil supply circuit is recorded as the thick section, and the section close to the clutch pressure plate is recorded as the thin section. The diameter and length of the thick section are both larger than the diameter and length of the thin section.
4. The clutch one-way valve device according to claim 3, characterized in that: The one-way valve is arranged in the thick section, the one-way valve is interference-fitted with the inner wall of the thick section, and two ends of the one-way valve are aligned with two ends of the thick section.
5. The clutch one-way valve device according to claim 4, characterized in that: The valve sleeve includes a first valve sleeve and a second valve sleeve, both of which are cylindrical structures with consistent inner and outer diameters. The inner diameters are both larger than the diameter of the valve ball. Both are interference fit with the inner wall of the thick section. The axial direction is parallel to the axial direction of the clutch, the proximal ends are aligned with each other, and the distal ends are aligned with the two ends of the thick section.
6. The clutch one-way valve device according to claim 5, characterized in that: The edges of one end of the first valve sleeve and the second valve sleeve close to the clutch pressure plate are chamfered.
7. The clutch one-way valve device according to claim 5 or 6, characterized in that: The inner cavity of the first valve sleeve is closed at one end close to the clutch pressure plate, which is recorded as the first port. The diameter of the port is less than or equal to the diameter of the thin section and smaller than the diameter of the valve ball.
8. The clutch one-way valve device according to claim 5 or 6, characterized in that: The inner cavity of the second valve sleeve is closed at one end close to the oil supply line, which is recorded as the second port. The diameter of the port is greater than or equal to the diameter of the thin section and smaller than the diameter of the valve ball.