A clutch for a small door for refueling or charging a car

Abstract

The present invention discloses a clutch for a small door for refueling or charging an automobile, comprising a clutch end cover, a clutch cover, a sphere, a clutch plate, a multi-layer wave spring, a clutch base and a turbine. The clutch cover and the clutch base are detachably connected together to form a clutch space. The outer end of the clutch base is arranged outside the clutch space and meshes with the turbine. The inner end of the clutch base is arranged in the clutch space and is axially movably connected to the clutch plate. The multi-layer wave spring is arranged between the clutch plate and the clutch base. The inner end of the clutch end cover is arranged in the clutch cover and is connected to the clutch plate through the sphere. The outer end of the clutch end cover extends out of the clutch cover and is limited by the clutch cover. The outer end is also provided with a connecting portion connected to an actuator of the small door for refueling or charging. When the actuator works normally, the multi-layer wave spring connects the clutch plate and the clutch end cover together for rotation. When the turbine does not rotate, the clutch end cover rotates through the sphere.

Description

Technical Field

[0001] The invention relates to a clutch for an actuating mechanism of a small door for refueling or charging an automobile. Background Art

[0002] Since the small door lock for refueling or charging the car is located outside the car body, the driver needs to get out of the vehicle and reach outside the vehicle to open and close the door lock, which is extremely inconvenient to operate.

[0003] With the continuous development and progress of the automobile industry, some cars have begun to use refueling or charging door actuators, which can realize the automatic opening and closing of the refueling or charging door through the actuator, without the need for manual operation of the door lock, and are convenient and quick to use. However, when the motor of the existing automobile refueling or charging door actuator fails or the car is out of power, it is necessary to manually open and close the refueling or charging door. Because the clutch of the existing actuator adopts an end gear structure, the clutch separation process will produce a large noise during manual operation, and the refueling or charging door will also be impacted and shaken, which has certain defects. Summary of the invention

[0004] The technical problem to be solved by the present invention is to provide a clutch for a car refueling or charging door in order to solve the above-mentioned deficiencies of the prior art, so that it can run smoothly during the manual operation of the clutch separation process to reduce noise and reduce the impact and shaking of the refueling or charging door.

[0005] The technical solution adopted by the present invention to solve the above technical problems is:

[0006] A clutch for a small door for refueling or charging a car comprises a clutch end cover, a clutch cover, a sphere, a clutch plate, a multi-layer wave spring, a clutch base and a turbine. The clutch cover and the clutch base are detachably connected together to form a clutch space. The outer end of the clutch base is arranged outside the clutch space and meshes with the turbine. The inner end of the clutch base is arranged in the clutch space and is axially movably connected to the clutch plate. The multi-layer wave spring is arranged between the clutch plate and the clutch base. The inner end of the clutch end cover is arranged in the clutch cover and is connected to the clutch plate through the sphere. The outer end of the clutch end cover extends out of the clutch cover and is limited by the clutch cover. The outer end is also provided with a connecting portion connected to a refueling or charging small door actuator. When the actuator works normally, the multi-layer wave spring connects the clutch plate and the clutch end cover together for rotation. When the turbine does not rotate, the clutch end cover rotates through the sphere.

[0007] Preferably, a clutch spherical chamber is provided at the inner end of the clutch end cover, a positioning spherical chamber is provided at the clutch plate, and the ball is placed in the positioning spherical chamber and the clutch spherical chamber, so that the ball is easier to position.

[0008] Preferably, the clutch end cover sets the flat position of the potentiometer shaft hole and the flat position of the inner spline hole at the same positioning angle, so that the zero position of the potentiometer and the initial position of the refueling or charging door closed are more accurately aligned to improve control accuracy.

[0009] Preferably, the clutch spherical chamber provided in the clutch end cover has a depth less than the radius of the sphere, so as to ensure that the sphere will not stay in the clutch spherical chamber when the clutch is disengaged and can be smoothly separated therefrom.

[0010] Preferably, a transition arc is provided at the mouth of the clutch spherical chamber to enable the ball to slide out of the clutch spherical chamber more smoothly.

[0011] Preferably, the depth of the positioning spherical chamber of the clutch plate is equal to the radius of the sphere, and the mouth of the positioning spherical chamber is set as a right angle edge to ensure that the ball remains in the positioning spherical chamber when the clutch is disengaged and does not separate from it.

[0012] Preferably, a plurality of positioning ribs are provided on the inner wall of the clutch cover to support the outer circle of the clutch end cover, so that the rotational friction of the clutch end cover when the clutch is disengaged can be reduced, thereby reducing the rotational torque.

[0013] Preferably, the end of each positioning rib is chamfered, so that it can play a guiding role when the clutch end cover is installed into the clutch cover, thereby facilitating assembly.

[0014] Preferably, a plurality of annular holes are provided at the bottom of the clutch cover to facilitate core pulling of the mold during the injection molding process, thereby optimizing the mold structure and improving mold reliability.

[0015] Preferably, the clutch cover is provided with a positioning hook, and the clutch base is provided with a limiting groove corresponding to the positioning hook. The positioning hook can be hung in the limiting groove to detachably connect the clutch cover and the clutch base together. Compared with other fixing methods such as ultrasonic welding and laser welding, the process is simpler, the production efficiency is high, and the disassembly is convenient.

[0016] Better yet, the clutch base includes spaced limit grooves on the bottom surface, the limit grooves are formed by limit ribs and anti-rotation ribs on two sides, the positioning hook can be hung in the limit groove, and also includes U-shaped notches spaced on the circumference of the clutch base, the positioning hook can pass axially through the U-shaped notch, and the height of the outer end of the anti-rotation rib is less than the compression distance of the multi-layer wave spring, so that assembly is more convenient.

[0017] Compared with the prior art, the advantages of the present invention are: due to the multi-layer wave spring arranged between the clutch base and the clutch plate, the clutch plate can produce axial movement. In this way, when the motor of the actuator fails or the car has no power, the turbine and the worm are self-locked due to the inability of the motor to work, resulting in the clutch base and the clutch plate being unable to rotate. At this time, manual operation is adopted to open and close the refueling or charging door. The refueling or charging door can drive the spline shaft and apply torque to the clutch end cover. The clutch spherical chamber arranged in the clutch end cover squeezes the ball to generate axial force to push the clutch plate to compress the multi-layer wave spring and produce axial movement. The ball slides out of the clutch spherical chamber and separates while rotating, and the clutch end cover can rotate. After rotating a certain angle, the ball enters another adjacent clutch spherical chamber, and the same process is repeated. The clutch end cover can rotate continuously, so that the refueling or charging door can be opened and closed. The separation process of the clutch end cover and the ball runs smoothly, which can reduce noise and reduce the impact and shaking of the refueling or charging door. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 The present invention is an exploded schematic diagram of a clutch for a small door for refueling or charging an automobile according to an embodiment of the present invention.

[0019] Figure 2 It is a schematic structural diagram of a clutch for a small door for refueling or charging an automobile according to an embodiment of the present invention.

[0020] Figure 3 It is a schematic structural diagram of a clutch end cover according to an embodiment of the present invention.

[0021] Figure 4 It is a three-dimensional schematic diagram of a clutch end cover according to an embodiment of the present invention.

[0022] Figure 5 It is a three-dimensional schematic diagram of the clutch end cover in another direction according to an embodiment of the present invention.

[0023] Figure 6 It is a three-dimensional schematic diagram of a clutch cover according to an embodiment of the present invention.

[0024] Figure 7 It is a schematic structural diagram of a clutch plate according to an embodiment of the present invention.

[0025] Figure 8 It is a three-dimensional schematic diagram of a clutch plate according to an embodiment of the present invention.

[0026] Fig. 9 It is a three-dimensional schematic diagram of a multi-layer wave spring according to an embodiment of the present invention.

[0027] Fig.10 It is a three-dimensional schematic diagram of a clutch base according to an embodiment of the present invention.

[0028] Fig.11 It is a three-dimensional schematic diagram of the clutch base in another direction according to the embodiment of the present invention.

[0029] Fig.12 It is a three-dimensional schematic diagram of a turbine according to an embodiment of the present invention.

[0030] Fig.13 It is a schematic structural diagram of the clutch in the disengaged state according to the embodiment of the present invention. DETAILED DESCRIPTION

[0031] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0032] like Figure 1-13 As shown, a clutch for a small door for refueling or charging a car includes a clutch end cover 1, a clutch cover 2, a ball 3, a clutch plate 4, a multi-layer wave spring 5, a clutch base 6 and a turbine 7.

[0033] like Figure 3 , 4 As shown in FIG. 5 , an internal spline 102 is provided at one end of the clutch end cover 1 , which cooperates with the spline shaft of the refueling or charging door actuator, thereby transmitting the torque of the actuator to the clutch end cover 1 .

[0034] A hole flat position 101 is also provided in the inner spline 102 of the clutch end cover 1. The hole flat position 101 and the hole flat position 103 of the potentiometer shaft are at the same positioning angle, so that the zero position of the potentiometer and the initial position of the refueling or charging door closing are more accurately aligned to improve the control accuracy.

[0035] A plurality of clutch spherical chambers 104 are arranged at the other end of the clutch end cover 1, and the depth H of the clutch spherical chamber 104 is less than the sphere radius, so as to ensure that the sphere 3 will not stay in the clutch spherical chamber 104 when the clutch is disengaged, thereby being able to be smoothly separated from the clutch end cover 1.

[0036] A transition arc 105 is also provided at the mouth of the clutch spherical chamber 104 of the clutch end cover 1, so that the ball 3 can slide out of the clutch spherical chamber 104 more smoothly.

[0037] The surface of the ball 3 is coated with lubricating grease before being installed in the clutch spherical chamber 104, which can reduce the friction between the ball and the clutch spherical chamber and the positioning spherical chamber when the clutch is disengaged, facilitate the rotation of the ball and extend the service life.

[0038] like Figure 6 As shown, a plurality of positioning ribs 201 are arranged on the circumference of the inner wall of the clutch cover 2, and the positioning ribs 201 cooperate with the outer circle of one end of the clutch end cover 1 to reduce the rotational friction of the clutch end cover 1 when the clutch is disengaged and reduce the rotational torque. In this embodiment, the clutch cover 2 is cylindrical, but it can also be other shapes.

[0039] Each end of the positioning rib 201 of the clutch cover 2 is provided with a chamfer 202, so as to play a guiding role when one end of the clutch end cover 1 is installed into the clutch cover 2, thereby facilitating the assembly between the two.

[0040] Five spaced positioning hooks 204 are arranged at one end of the clutch cover 2, and the hook surface 205 of the positioning hook can be fitted and locked with the five limiting grooves 603 of the clutch base 6. Compared with other fixing methods such as ultrasonic welding and laser welding, this connection method has a simpler process, high production efficiency and easy disassembly. A clutch space is formed between the clutch cover 2 and the clutch base 6 after connection.

[0041] The clutch cover 2 is provided with a plurality of annular holes 203 at the bottom thereof, which facilitates core pulling of the mold during injection molding, thereby optimizing the mold structure and improving the reliability of the mold.

[0042] like Figure 7 , 8 As shown, the clutch plate 4 is provided with an inner spline 405 and a flat position 404 at the center, which cooperate with the spline shaft and the shaft flat position 608 at the inner end of the clutch base 6, and can be inserted into the spline shaft and move axially thereon to transmit torque and position the reference angle.

[0043] The end surface of the clutch plate 4 is provided with a plurality of positioning spherical chambers 402, whose depth is H1, H1 being equal to the radius of the sphere, and the mouth of the positioning spherical chamber 402 is provided with a right angle edge 403 to ensure that the sphere remains in the positioning spherical chamber when the clutch is disengaged and does not separate from it.

[0044] like Fig. 9 As shown, the multi-layer wave spring 5 is provided with an upper flat end surface 501 and a lower flat end surface 502 on both sides, which are respectively fitted with the annular surface 401 of the clutch plate 4 and the bottom surface 6010 of the clutch base 6, so that the axial elastic force on the clutch plate 4 along the circumference is uniform, so that the clutch process moves smoothly and prevents jamming.

[0045] like Fig.10 , 11 As shown, the clutch base 6 includes 5 spaced limiting grooves 603 on the bottom surface 6010, the limiting grooves 603 are formed by limiting ribs 602 and anti-rotation ribs 604 on two sides, the positioning hook 204 can be hung in the limiting groove 603, and also includes 5 spaced U-shaped notches 601 on the circumference of the clutch base 6, the positioning hook 204 can axially pass through the U-shaped notch 601, so that during the clutch assembly process, the U-shaped notch 601 of the clutch base 6 is aligned with the positioning hook 204 of the clutch cover 2 and applies axial force to compress the multi-layer wave spring 5 to install it into the clutch cover 2, and then the clutch base 6 is rotated clockwise until the positioning hook 204 is aligned with the limiting groove 603, and after the axial force is stopped, the elastic force of the multi-layer wave spring makes the positioning hook 204 fit and lock with the limiting groove 603.

[0046] The height of the outer end of the anti-rotation rib 604 is smaller than the compression distance of the multi-layer wave spring 5, so that when the clutch cover 2 rotates, it is convenient for the positioning hook 204 to pass through.

[0047] The outer end of the clutch base 6 is provided with an outer circular surface 607 and an axle flat 605, which respectively cooperate with the inner circular surface 701 and the hole flat 702 at the center of the turbine 7. Fig.12 The outer end of the clutch base 6 is inserted into the center of the turbine 7 to fix the two, so that the torque of the turbine 7 can be transmitted to the clutch base 6.

[0048] The outer inner end of the clutch base 6 is provided with an external spline 609 and an axial flattened portion 608, which respectively cooperate with the internal spline 405 and the flattened portion 404 of the clutch plate 4. The internal spline 405 of the clutch plate 4 is inserted into the external spline 609 at the inner end of the clutch base 6, so that the torque of the clutch base 6 can be transmitted to the clutch plate 4, and the clutch plate 4 can also overcome the elastic force of the multi-layer wave spring 5 and move at the inner end of the clutch base 6.

[0049] The clutch base 6 is provided with a potentiometer shaft hole 606 which passes through the outer end to the inner end, so as to allow the potentiometer shaft to pass through the hole.

[0050] The bottom surface 6010 of the clutch base 6 is in contact with the lower flat end surface 502 of the multi-layer wave spring 5, supporting and positioning it, and bearing its axial elastic force.

[0051] During normal operation, due to the elastic force of the multi-layer wave spring, the turbine, clutch base, clutch plate, ball, clutch end cover and spline shaft are connected as one. After the automobile refueling or charging door actuator is energized, the worm gear transmits the torque step by step to the clutch's turbine, clutch base, clutch plate, ball, clutch end cover and spline shaft to realize the opening and closing of the refueling or charging door.

[0052] When the motor of the actuator fails or the car is out of power, the motor cannot work, the turbine 7 and the worm will self-lock, causing the clutch base 6 and the clutch plate 4 to be unable to rotate. Fig.13 As shown, when the clutch is used and the refueling or charging door is opened and closed manually, the refueling or charging door drives the spline shaft to apply torque to the clutch end cover 1, and the clutch spherical chamber provided in the clutch end cover 1 squeezes the ball 3 to generate axial force to push the clutch plate to compress the multi-layer wave spring 5 and generate axial movement. The ball 3 slides out of the clutch spherical chamber and separates while rotating, and the clutch end cover 1 can rotate. After rotating a certain angle, the ball enters another adjacent clutch spherical chamber, and the same process is repeated. The clutch end cover 1 can rotate continuously, so that the refueling or charging door can be opened and closed smoothly, and the separation process of the clutch end cover and the ball runs smoothly, which can reduce noise and prevent the refueling or charging door from impact and shaking.

Claims

1. A clutch for a small door for refueling or charging a car, characterized by: The clutch cover comprises a clutch end cover, a clutch cover, a sphere, a clutch plate, a multi-layer wave spring, a clutch base and a turbine. The clutch cover and the clutch base are detachably connected together to form a clutch space. The outer end of the clutch base is arranged outside the clutch space and meshes with the turbine. The inner end of the clutch base is arranged in the clutch space and is axially movably connected to the clutch plate. The multi-layer wave spring is arranged between the clutch plate and the clutch base. The inner end of the clutch end cover is arranged in the clutch cover and is connected to the clutch plate through the sphere. The outer end of the clutch end cover extends out of the clutch cover and is limited by the clutch cover. The outer end is also provided with a connecting portion connected to a refueling or charging door actuator. When the actuator is working normally, the multi-layer wave spring The spring connects the clutch plate and the clutch end cover together for rotation; when the turbine does not rotate, the clutch end cover rotates through the sphere; a clutch spherical chamber is arranged at the inner end of the clutch end cover, and a positioning spherical chamber is arranged on the clutch plate, and the sphere is placed in the positioning spherical chamber and the clutch spherical chamber; when the clutch is used and the refueling or charging door is opened and closed manually, the refueling or charging door drives the spline shaft to apply torque to the clutch end cover, and the clutch spherical chamber arranged on the clutch end cover squeezes the sphere to generate axial force to push the clutch plate to compress the multi-layer wave spring and generate axial movement, and the sphere slides out of the clutch spherical chamber and separates while rotating, and the clutch end cover can rotate, and after rotating a certain angle, the sphere enters another adjacent clutch spherical chamber.

2. The clutch for a small door for refueling or charging a car as claimed in claim 1, characterized in that: The clutch spherical chamber provided with the clutch end cover has a depth less than the radius of the sphere.

3. The clutch for a small door for refueling or charging a vehicle as claimed in claim 1 or 2, characterized in that: A transition arc is arranged at the mouth of the clutch spherical chamber.

4. The clutch for a small door for refueling or charging a car as claimed in claim 1, characterized in that: The depth of the positioning spherical chamber arranged by the clutch plate is equal to the radius of the sphere, and the opening of the positioning spherical chamber is arranged as a right angle side.

5. The clutch for a small door for refueling or charging a car as claimed in claim 2, characterized in that: A plurality of positioning ribs for supporting the outer circle of the clutch end cover are arranged on the inner wall of the clutch cover.

6. The clutch for a small door for refueling or charging a car as claimed in claim 5, characterized in that: The end of each positioning rib is provided with a chamfer.

7. The clutch for a small door for refueling or charging a vehicle as claimed in claim 1 or 2, characterized in that: A plurality of annular holes are arranged at the bottom of the clutch cover.

8. The clutch for a small door for refueling or charging a vehicle as claimed in claim 1 or 2, characterized in that: The clutch cover is provided with a positioning hook, and the clutch base is provided with a limiting groove corresponding to the positioning hook. The positioning hook can be hung in the limiting groove to detachably connect the clutch cover and the clutch base.

9. The clutch for a small door for refueling or charging a vehicle as claimed in claim 1 or 2, characterized in that: The clutch base includes spaced limit grooves on the bottom surface, the limit grooves are formed by limit ribs and anti-rotation ribs on two sides, the positioning hook can be hung in the limit groove, and also includes U-shaped notches spaced on the circumference of the clutch base, the positioning hook can pass axially through the U-shaped notch, and the outer end height of the anti-rotation rib is less than the compression distance of the multi-layer wave spring.

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