A precision clutch for vehicles

Abstract

The application discloses a vehicle special precision clutch and belongs to the technical field of industrial transmission. The vehicle special precision clutch comprises a shell, a spline shaft rotatably connected in the shell, a driving claw rotatably connected in the shell and sleeved on the spline shaft away from one end of the spline shaft, a plurality of steel sheets axially moving on the spline shaft, a plurality of friction sheets axially moving in the driving claw, an inner tooth disc axially moving on the spline shaft, and a driving piece arranged on the shell and used for driving the inner tooth disc to move when ventilation so as to separate the steel sheets and the friction sheets. The steel sheets and the friction sheets are both provided with a plurality of steel sheets and a plurality of friction sheets, and the plurality of steel sheets and the plurality of friction sheets are sequentially and spacedly arranged. The vehicle special precision clutch is in a normally closed structure in a natural state, not only meets the working condition demand of long-term combination, but also can still keep stable torque transmission capacity under low air pressure condition.

Description

Technical Field

[0001] This application relates to the field of industrial transmission technology, specifically a precision clutch for vehicles. Background Technology

[0002] In the field of industrial transmission, friction clutches, as a key mechanical component, are widely used in various applications requiring power transmission and separation. For example... Figure 2 As shown, a traditional friction clutch includes multiple components such as a hollow through-shaft tube 1', a connecting disc 2', a release disc spring 3', a drive pressure plate 4', a piston 5', a pressure source inlet 6', steel plates 7', and friction plates 8'. When engaged, when air is supplied from the pressure source inlet 6', the piston 5' pushes the drive pressure plate 4' to press against the multiple sets of steel plates 7' and friction plates 8', and the clutch is engaged, transmitting torque. When disengaged, when the pressure source is cut off, the release disc spring 3' pushes the drive pressure plate 4' axially away from the steel plates 7' and friction plates 8', and the clutch is disengaged, no torque is transmitted, and the driving end restarts.

[0003] However, traditional friction clutches are mostly normally open structures, meaning that the clutch is in the disengaged state under normal conditions. This design is particularly inconvenient in working conditions that require long-term engagement, as an external power source is needed to maintain the clutch engagement, thus increasing energy consumption. In addition, traditional friction clutches have high requirements for working air pressure. When the air pressure is below a certain threshold, such as 0.6MPa, the clutch torque will drop significantly, or it may even fail to work properly, thus limiting the application range of the clutch.

[0004] Therefore, this application provides a precision clutch specifically for vehicles to solve the above-mentioned problems. Utility Model Content

[0005] This application provides a precision clutch specifically for vehicles, aiming to solve the problems mentioned in the background art, such as the increased energy consumption caused by the need for a continuous power source to maintain engagement under long-term engagement conditions, the high requirements for working air pressure, and the significant decrease in torque or even failure to work when the air pressure is below 0.6MPa, which limits the scope of application.

[0006] To achieve the above objectives, this application provides the following technical solution: a precision clutch for vehicles, comprising a housing, a splined shaft rotatably connected within the housing, a drive pawl rotatably connected within the housing at one end away from the splined shaft and sleeved on the splined shaft, a plurality of steel plates axially movable on the splined shaft, a plurality of friction plates axially movable within the drive pawl, an internal gear disk axially movable on the splined shaft, and a drive component disposed on the housing for driving the internal gear disk to move and separate the steel plates and friction plates during ventilation, wherein a plurality of steel plates and friction plates are provided, and the plurality of steel plates and the plurality of friction plates are arranged sequentially at intervals;

[0007] The precision clutch also includes a spring hole located on the side of the internal gear disc away from the steel plate, and a brake spring fixedly installed in the spring hole and connected to the housing for driving the internal gear disc to move and contact the steel plate and friction plate when the air supply is cut off. Driven by the air supply of the driving component, the internal gear disc moves, thereby causing the steel plate and friction plate to separate, thus achieving clutch disengagement. Simultaneously, the combined design of the spring hole and brake spring, when the air supply is cut off, drives the internal gear disc to move, causing the steel plate and friction plate to make tight contact, thus achieving clutch engagement. This allows the clutch to be normally closed in its natural state, not only meeting the requirements of long-term engagement but also maintaining stable torque transmission capability under low air pressure conditions, improving the clutch's applicability and reliability.

[0008] Preferably, to provide stable support and enhance corrosion resistance, the housing includes a front cover sleeved on the outer side of the spline shaft near the internal gear disk and a rear cover sleeved on the outer side of the spline shaft near the drive claw. The front cover and the rear cover are fixedly connected by screws, and both the front cover and the rear cover are made of aluminum alloy. The housing is composed of a front cover and a rear cover, which are tightly fixed by screws to form a stable support structure. At the same time, the aluminum alloy material makes the housing both lightweight and has good strength and corrosion resistance.

[0009] Preferably, to ensure the rotation of the spline shaft and the drive pawl, precision bearing one, which is connected to the inner wall of the front cover and the inner wall of the rear cover, is fixedly sleeved on the spline shaft and the drive pawl, respectively. Precision bearing two, which is connected to the inner wall of the drive pawl, is fixedly sleeved on the spline shaft. This design allows precision bearing one and precision bearing two to provide support and guidance when the spline shaft and the drive pawl rotate, ensuring that the spline shaft and the drive pawl can operate smoothly and stably. At the same time, the two precision bearings can also act as a barrier to prevent external dust and impurities from entering the housing and affecting the normal operation of the clutch.

[0010] Preferably, in order to avoid damaging the front and rear covers, steel washers are fixedly provided at the contact points between the two precision bearings and the front and rear covers. The steel washers effectively disperse the contact pressure between the precision bearing pair and the front and rear covers, avoiding damage caused by excessive local pressure. This allows the steel washers to absorb some of the impact force when the clutch is running at high speed or subjected to impact, further protecting the front and rear covers from damage and improving the overall durability of the clutch.

[0011] Preferably, to ensure the use of the clutch, a first stop ring is fixedly provided at the end of the spline shaft near the internal gear plate, and a second stop ring is fixedly provided at the end of the spline shaft near the drive pawl. The end of the brake spring away from the spring hole is fixedly connected to the first stop ring. The setting of the first and second stop rings effectively restricts the axial movement of the spline shaft in the housing, preventing the clutch performance from deteriorating or being damaged due to the axial movement of the spline shaft, ensuring the stability and reliability of the clutch during operation. In addition, the design of the second stop ring can prevent dust from the friction plate after wear from entering the second precision bearing between the spline shaft and the drive pawl, affecting the life of the second precision bearing, and indirectly further improving the durability of the clutch.

[0012] Preferably, to achieve the movement of the internal gear disc and the disengagement of the clutch, the driving component includes a piston ring rotatably mounted on the internal gear disc and slidably connected within the front cover; an air inlet mounted on the front cover and located on the side of the piston ring near the internal gear disc for introducing a pressure source to cause the piston ring to drive the internal gear disc to move away from the steel plate; and a sealing ring fixedly mounted within the front cover on the side corresponding to the air inlet and connected to the outside of the piston ring. The piston ring is slidably connected within the sealing ring. Introducing a pressure source through the air inlet can push the piston ring to drive the internal gear disc to move, thereby achieving clutch disengagement. At the same time, the sealing ring ensures the sealing between the piston ring and the front cover, preventing leakage of the pressure source and ensuring the reliability of clutch disengagement.

[0013] Preferably, in order to improve the reliability and durability of the clutch, a magnetic ring for detecting whether the clutch is in a disengaged state is fixedly installed on the internal gear plate, and retaining rings are fixedly installed on both sides of the internal gear plate corresponding to the magnetic ring. The magnetic ring, as a state detection element, can reflect the working state of the clutch in real time. At the same time, the design of the two retaining rings forms an effective protective barrier. When the clutch is subjected to impact or vibration during operation, the retaining rings can block the axial movement of the magnetic ring and prevent it from moving or being damaged due to force.

[0014] This vehicle-specific precision clutch, through the design of spring holes and brake springs, allows the internal gear disc to move when the air supply is cut off, causing the steel plates and friction plates to come into close contact and engage the clutch. This results in a normally closed structure in the clutch's natural state, which not only meets the requirements of working conditions that require long-term engagement but also ensures that the clutch maintains a stable torque transmission capability under low air pressure conditions, thus improving the clutch's applicability and reliability.

[0015] This vehicle-specific precision clutch, through the installation of steel washers, can absorb some of the impact force, further protecting the front and rear covers from damage and improving the overall durability of the clutch.

[0016] This vehicle-specific precision clutch effectively restricts the axial movement of the spline shaft within the housing through the setting of retaining ring one and retaining ring two, ensuring the stability and reliability of the clutch during operation. At the same time, retaining ring two can also prevent dust from the precision bearing two after the friction plates wear, which affects the life of the precision bearing two, and indirectly further improves the durability of the clutch.

[0017] This vehicle-specific precision clutch uses a magnetic ring as a status detection element, which can reflect the working status of the clutch in real time. At the same time, retaining rings are set on both sides of the magnetic ring to form an effective protective barrier to prevent the magnetic ring from moving or being damaged due to force. Attached Figure Description

[0018] Figure 1 This is a cross-sectional structural diagram of a precision clutch specifically designed for vehicles.

[0019] Figure 2 This is a cross-sectional schematic diagram of a traditional friction clutch.

[0020] In the picture:

[0021] 1. Housing; 11. Front cover; 12. Rear cover; 13. Precision bearing one; 14. Steel washer; 15. Precision bearing two;

[0022] 2. Splined shaft; 21. Retaining ring one; 22. Retaining ring two;

[0023] 3. Drive claw;

[0024] 4. Steel sheets;

[0025] 5. Friction plates;

[0026] 6. Internal gear plate; 61. Spring hole; 62. Retaining ring;

[0027] 7. Drive components; 71. Piston ring; 72. Air inlet; 73. Sealing ring;

[0028] 8. Brake spring;

[0029] 9. Magnetic ring. Detailed Implementation

[0030] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0031] Example 1

[0032] This embodiment provides a precision clutch specifically for vehicles, such as... Figure 1 and Figure 2 As shown, the precision clutch for vehicles includes a housing 1, a splined shaft 2 rotatably connected within the housing 1, a drive pawl 3 rotatably connected within the housing 1 at one end away from the splined shaft 2 and sleeved on the splined shaft 2, several steel plates 4 that move axially on the splined shaft 2, several friction plates 5 that move axially within the drive pawl 3, an internal gear disk 6 that moves axially on the splined shaft 2, and a drive component 7 mounted on the housing 1 for driving the internal gear disk 6 to move and separate the steel plates 4 and friction plates 5 when air is supplied. Several steel plates 4 and several friction plates 5 are provided, and the several steel plates 4 and several friction plates 5 are arranged alternately. The precision clutch also includes a spring hole 61 located on the side of the internal gear disk 6 away from the steel plates 4, and a brake spring 8 fixedly mounted within the spring hole 61 and connected to the housing 1 for driving the internal gear disk 6 to move and contact the steel plates 4 and friction plates 5 when air is cut off.

[0033] In use, when the air supply is blocked, the brake spring 8, fixedly installed in the spring hole 61 on the side of the internal gear disc 6 away from the steel plate 4 and connected to the housing 1, will push the internal gear disc 6 axially towards the steel plate 4 by its own elastic force, thereby applying pressure to the steel plate 4. This causes several steel plates 4 and friction plates 5, arranged at intervals, to tightly engage. At this time, the spline shaft 2 at the input end and the drive pawl 3 at the output end are in a relatively stationary state. That is, when the spline shaft 2 at the input end rotates, its power cannot be transmitted to the drive pawl 3 through the friction between the steel plates 4 and the friction plates 5. The drive pawl 3 does not rotate accordingly, and the clutch as a whole is engaged, thus realizing power transmission. The clutch is temporarily blocked. When the clutch pressure source is vented, the drive component 7 starts to work. Under the action of air pressure, it pushes the internal gear plate 6 to move away from the steel plate 4. During this process, the internal gear plate 6 will compress the brake spring 8. As the internal gear plate 6 continues to move, the pressure between the steel plate 4 and the friction plate 5 gradually decreases until several steel plates 4 and several friction plates 5 are completely separated. At this time, the spline shaft 2 at the input end and the drive pawl 3 at the output end are no longer constrained by the friction of the steel plate 4 and the friction plate 5. When the spline shaft 2 at the input end rotates, its power can be directly transmitted to the drive pawl 3, causing the drive pawl 3 to rotate together. The clutch is in the open state, realizing the restoration of power transmission.

[0034] To provide stable support and enhance corrosion resistance, the housing 1 includes a front cover 11 fitted on the outer side of the spline shaft 2 near the internal gear plate 6 and a rear cover 12 fitted on the outer side of the spline shaft 2 near the drive claw 3. The front cover 11 and the rear cover 12 are fixedly connected by screws. Both the front cover 11 and the rear cover 12 are made of aluminum alloy. The housing 1 is composed of the front cover 11 and the rear cover 12, which are tightly fixed by screws to form a stable support structure. At the same time, the aluminum alloy material makes the housing 1 both lightweight and has good strength and corrosion resistance.

[0035] In addition, to ensure the rotation of the spline shaft 2 and the drive pawl 3, precision bearings 13 are fixedly sleeved on the spline shaft 2 and the drive pawl 3, respectively, and are in contact with the inner wall of the front cover 11 and the inner wall of the rear cover 12. A precision bearing 15 is fixedly sleeved on the spline shaft 2 and is in contact with the inner wall of the drive pawl 3. This design allows the precision bearings 13 and 15 to provide support and guidance when the spline shaft 2 and the drive pawl 3 rotate, ensuring that the spline shaft 2 and the drive pawl 3 can operate smoothly and stably. At the same time, the two precision bearings 13 can also act as a barrier to prevent external dust and impurities from entering the housing 1 and thus avoid affecting the normal operation of the clutch.

[0036] Specifically, the drive component 7 includes a piston ring 71 rotatably mounted on the inner gear disk 6 and slidably connected to the front cover 11, an air inlet 72 mounted on the front cover 11 and located on the side of the piston ring 71 near the inner gear disk 6 for introducing a pressure source to drive the piston ring 71 to move the inner gear disk 6 away from the steel plate 4, and a sealing ring 73 fixedly mounted on the side of the front cover 11 corresponding to the air inlet 72 and connected to the outside of the piston ring 71. The piston ring 71 is slidably connected to the sealing ring 73.

[0037] When the clutch needs to be in the open state, a pressure source, such as compressed air, is introduced into the drive component 7 through the air inlet 72. Under the action of pressure, the piston ring 71 is pushed away from the steel plate 4, thereby driving the internal gear plate 6 to move axially away from the steel plate 4. The sealing ring 73 is fixedly set inside the front cover 11 on the side corresponding to the air inlet 72, and the outer side of the piston ring 71 is slidably connected to the sealing ring 73. This ensures that the pressure source introduced through the air inlet 72 will not leak, forming a good sealing effect and ensuring that the pressure can act on the piston ring 71, so that the piston ring 71 can drive the internal gear plate 6 to move away from the steel plate 4. As the internal gear plate 6 moves, the pressure between the steel plate 4 and the friction plate 5 decreases, and then several steel plates 4 and several friction plates 5 will separate, thus no longer constrained by the friction of the steel plates 4 and the friction plates 5. The spline shaft 2 at the input end and the drive pawl 3 at the output end can rotate together, completing the switching of the clutch from the engaged state to the open state.

[0038] Furthermore, a stop ring 21 is fixedly provided at one end of the spline shaft 2 near the internal gear plate 6, and a stop ring 22 is fixedly provided at one end of the spline shaft 2 near the drive claw 3. The end of the brake spring 8 away from the spring hole 61 is fixedly connected to the stop ring 21.

[0039] The first stop ring 21 and the second stop ring 22 are respectively fixedly installed at both ends of the spline shaft 2 near the internal gear plate 6 and the drive claw 3. Through their cooperation with the housing 1, they form a physical barrier, thereby restricting the movement of the spline shaft 2 along the axial direction. This ensures that the spline shaft 2 can only rotate around the axis and cannot move back and forth in the axial direction, so as to avoid the axial movement of the spline shaft 2 causing the clutch performance to be reduced or damaged. This ensures that the clutch operates stably and reliably. In addition, the second stop ring 22 can also prevent the dust generated by the wear of the friction plate 5 from entering the precision bearing 15 between the spline shaft 2 and the drive claw 3, preventing it from affecting the life of the precision bearing 15, thereby indirectly improving the durability of the clutch.

[0040] Example 2

[0041] Unlike Example 1, as Figure 1As shown, in order to avoid damaging the front cover 11 and the rear cover 12, steel washers 14 are fixedly installed at the contact points between the two precision bearings 13 and the front cover 11 and the rear cover 12. The installation of steel washers 14 effectively disperses the contact pressure between the precision bearings 13 and the front cover 11 and the rear cover 12, avoiding damage caused by excessive local pressure. This allows the steel washers 14 to absorb part of the impact force when the clutch is running at high speed or subjected to impact, further protecting the front cover 11 and the rear cover 12 from damage and improving the overall durability of the clutch.

[0042] Example 3

[0043] Unlike Examples 1 and 2, as Figure 1 As shown, in order to improve the reliability and durability of the clutch, a magnetic ring 9 for detecting whether the clutch is in the disengaged state is fixedly installed on the internal gear plate 6. Retaining rings 62 are fixedly installed on both sides of the internal gear plate 6 corresponding to the magnetic ring 9. As a state detection element, the magnetic ring 9 can reflect the working state of the clutch in real time. At the same time, during the clutch operation, the retaining rings 62 can effectively block the axial movement of the magnetic ring 9, prevent the magnetic ring 9 from moving due to force, and also buffer some impact force to avoid the magnetic ring 9 being directly damaged by excessive impact, thereby improving the stability and durability of the entire clutch system.

[0044] It should be added that when the clutch is in the open state, the internal gear plate 6 will move away from the steel plate 4 due to the action of the drive component 7. At this time, the magnetic ring 9 moves together with the internal gear plate 6. A sensor is provided on the outside of the housing 1 to sense the position change of the magnetic ring 9. When the magnetic field strength or magnetic field distribution characteristics generated by the magnetic ring 9 change, the sensor detects these magnetic field changes, converts the physical signal into an electrical signal, and transmits the signal to the vehicle's control system. The control system determines that the clutch is in the disengaged state. When the clutch is engaged, the internal gear plate 6 moves closer to the steel plate 4, and the position of the magnetic ring 9 also changes accordingly. The sensor again captures the magnetic field change and feeds back the signal to the control system, realizing the detection of the engagement state.

[0045] The above description is merely a preferred embodiment of this application, but the scope of protection of this application is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in this application, based on the technical solution and concept of this application, should be included within the scope of protection of this application.

Claims

1. A precision clutch for vehicles, comprising a housing (1), a splined shaft (2) rotatably connected within the housing (1), a drive pawl (3) rotatably connected within the housing (1) at one end away from the splined shaft (2) and sleeved on the splined shaft (2), a plurality of steel plates (4) axially movable on the splined shaft (2), a plurality of friction plates (5) axially movable within the drive pawl (3), an internal gear disc (6) axially movable on the splined shaft (2), and a drive member (7) disposed on the housing (1) for driving the internal gear disc (6) to move and separate the steel plates (4) and friction plates (5) when ventilation is provided, wherein a plurality of steel plates (4) and friction plates (5) are provided, and the plurality of steel plates (4) and the plurality of friction plates (5) are arranged alternately in sequence; Its features are: The precision clutch also includes a spring hole (61) disposed on the side of the internal gear disc (6) away from the steel plate (4) and a brake spring (8) fixedly disposed in the spring hole (61) and connected to the housing (1) for driving the internal gear disc (6) to move so that the steel plate (4) and the friction plate (5) come into contact when the air is cut off. The housing (1) includes a front cover (11) sleeved on the outside of the spline shaft (2) near the internal gear disk (6) and a rear cover (12) sleeved on the outside of the spline shaft (2) near the drive claw (3). The front cover (11) and the rear cover (12) are fixedly connected by screws. Both the front cover (11) and the rear cover (12) are made of aluminum alloy. A stop ring one (21) is fixedly provided at one end of the spline shaft (2) near the internal gear disk (6), and a stop ring two (22) is fixedly provided at one end of the spline shaft (2) near the drive claw (3). The brake spring (8) is fixedly connected to the stop ring one (21) at one end away from the spring hole (61). The drive unit (7) includes a piston ring (71) rotatably mounted on the inner gear disk (6) and slidably connected to the front cover (11), an air inlet (72) mounted on the front cover (11) and located on the side of the piston ring (71) near the inner gear disk (6) for introducing a pressure source to cause the piston ring (71) to drive the inner gear disk (6) to move away from the steel plate (4), and a sealing ring (73) fixedly mounted in the front cover (11) on the side corresponding to the air inlet (72) and connected to the outside of the piston ring (71), wherein the piston ring (71) is slidably connected to the sealing ring (73).

2. The precision clutch for vehicles according to claim 1, characterized in that: Precision bearing one (13) is fixedly sleeved on the spline shaft (2) and the drive claw (3) respectively, and is connected to the inner wall of the front cover (11) and the inner wall of the rear cover (12). Precision bearing two (15) is fixedly sleeved on the spline shaft (2) and is connected to the inner wall of the drive claw (3).

3. The precision clutch for vehicles according to claim 2, characterized in that: Steel washers (14) are fixedly installed at the joints between the two precision bearings (13) and the front cover (11) and the rear cover (12).

4. The precision clutch for vehicles according to claim 1, characterized in that: A magnetic ring (9) for detecting whether the clutch is in a disengaged state is fixedly installed on the internal gear disk (6), and retaining rings (62) are fixedly installed on both sides of the internal gear disk (6) corresponding to the magnetic ring (9).

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