A bidirectional non-return transmission mechanism, electric cylinder and use method

Abstract

The present invention provides a bidirectional non-return transmission mechanism, which can drive the output shaft to rotate smoothly in the forward direction when the input shaft rotates in a certain direction, and can drive the output shaft to rotate smoothly in the reverse direction when the input shaft rotates in the opposite direction, and the output shaft can neither rotate forward nor reverse under the action of external force when the input shaft does not rotate. It includes a housing, an input shaft, an output shaft, a one-way clutch 1, and a one-way clutch 2; a pressure plate 1 and a pressure plate 2 matched with a spiral line are arranged on the output shaft, and the pressure plate 1 and the pressure plate 2 are connected to the input shaft that drives the pressure plate 1 and the pressure plate 2 to rotate but does not limit the axial movement of the pressure plate 1 and the pressure plate 2; a force transmission plate 1 and a force transmission plate 2 are fixed on the output shaft; the one-way clutch 1 includes a fixed outer component 1 and an inner disk component 1 that can rotate in one direction; the one-way clutch 2 includes a fixed outer component 2 and an inner disk component 2 that can rotate in one direction; the inner disk component 1 and the inner disk component 2 can rotate in opposite directions.

Description

Technical Field

[0001] This patent relates to a bidirectional non-return transmission mechanism and an electric cylinder using the bidirectional non-return transmission mechanism. Background Art

[0002] The electric cylinder uses a motor to drive the piston rod to move forward and backward. When the piston rod needs to be kept in a certain working position, the motor needs to be continuously powered, which will cause the motor to overheat and consume a lot of power, especially in heavy vehicles with large loads. This disadvantage is particularly prominent, resulting in the use of hydraulic systems on heavy vehicles. Electric vehicles, especially heavy-duty electric engineering vehicles such as loaders and excavators, are in urgent need of an efficient and reliable electric cylinder that can cut off the power or consume less power while maintaining the working state, and the motor will not overheat.

[0003] The existing bidirectional transmission mechanism cannot achieve bidirectional smooth rotation. For example, when the unlockable overrunning clutch is unlocked under load, it will rotate jerkily, which cannot meet the stability requirements of braking control. The bidirectional transmission mechanism must achieve both bidirectional smooth rotation of the output shaft and bidirectional backstop when the output shaft is not rotating, which has always been difficult to solve. Summary of the invention

[0004] The purpose of this patent is to provide a bidirectional check transmission mechanism, which can drive the output shaft to rotate smoothly in the forward direction when the input shaft rotates in a certain direction, and can drive the output shaft to rotate smoothly in the reverse direction when the input shaft rotates in the opposite direction. When the input shaft does not rotate, the output shaft cannot rotate forward or reverse under the action of external force.

[0005] The bidirectional non-return transmission mechanism of the present invention comprises a housing, an input shaft, an output shaft, a one-way clutch 1 and a one-way clutch 2; the characteristics are as follows: a pressure plate 1 and a pressure plate 2 which are matched with the output shaft in a spiral line are arranged on the output shaft, and the pressure plate 1 and the pressure plate 2 are connected to the input shaft which drives the pressure plate 1 and the pressure plate 2 to rotate but does not restrict the axial movement of the pressure plate 1 and the pressure plate 2; a force transmission plate 1 and a force transmission plate 2 are fixed on the output shaft; the one-way clutch 1 comprises an outer member 1 fixed on the housing, and an inner plate member 1 which can rotate in one direction relative to the outer member 1; the one-way clutch 2 comprises an outer member 2 fixed on the housing, and an inner plate member 2 which can rotate in one direction relative to the outer member 2; the inner plate member 1 and the inner plate member 2 can rotate in opposite directions;

[0006] When the input shaft rotates in a certain direction, the pressure plate 1 moves axially to press the force transmission plate 1 and the inner plate component 1, so that the pressure plate 1, the force transmission plate 1 and the inner plate component 1 form a friction transmission structure that can transmit torque. At the same time, the pressure plate 2 moves axially to break away from the contact with the force transmission plate 1 and the inner plate component 1. The torque is transmitted from the input shaft to the output shaft through the pressure plate 1, the inner plate component 1 and the force transmission plate 1. The output shaft rotates forwardly under the drive of the input shaft. When the output shaft rotates forwardly for a certain angle, the input shaft stops rotating. At this time, the output shaft is driven by external force and When the force transfer plate 1 and the inner plate component 1 are rotated in the reverse direction opposite to the positive direction, since the inner plate component 1 cannot rotate in the reverse direction relative to the outer member 1, the output shaft cannot rotate in the reverse direction. At this time, if the output shaft is driven by an external force to rotate in the positive direction, the pressure plate 2 will move axially to press the force transfer plate 2 and the inner plate component 2, so that the pressure plate 2, the force transfer plate 2 and the inner plate component 2 form a friction transmission structure that can transmit torque. Since the inner plate component 2 cannot rotate in the positive direction relative to the outer member 2, the output shaft cannot rotate in the positive direction either.

[0007] In the above-mentioned two-way check transmission mechanism, the inner disk component one and the inner disk component two can move axially relative to the outer disk component one and the outer disk component two; when the input shaft rotates in a certain direction, the pressure plate one moves axially toward the inner disk component one to press the inner disk component one against the force transmission plate one, and at the same time, the pressure plate two moves axially away from the inner disk component two, and the torque is transmitted from the input shaft to the output shaft via the pressure plate one, the inner disk component one and the force transmission plate one, and the output shaft rotates forwardly under the drive of the input shaft; after the output shaft rotates forwardly by a certain angle, the input shaft stops rotating. At this time, if the output shaft rotates forwardly in advance under the drive of an external force, the pressure plate two will move axially toward the inner disk component two to press the inner disk component two against the force transmission plate two. Since the inner disk component two cannot rotate forwardly relative to the outer disk component two, the output shaft cannot rotate forwardly either.

[0008] The above-mentioned two-way check transmission mechanism is provided with a friction ring 1 between the axially opposite end faces of the inner disc component 1 and the pressure plate 1, or between the axially opposite end faces of the inner disc component 1 and the force transmission plate 1. The friction ring 1 is positioned on the inner disc component 1, the pressure plate 1 or the force transmission plate 1 in the radial direction. When the input shaft rotates in a certain direction, the pressure plate 1 moves axially toward the inner disc component 1 to axially compress the inner disc component 1, the friction ring 1 and the force transmission plate 1, and the torque is transmitted from the input shaft to the output shaft via the pressure plate 1, the friction ring 1, the inner disc component 1 and the force transmission plate 1.

[0009] In the above-mentioned two-way check transmission mechanism, the inner disk member of the one-way clutch is rotatably supported on the output shaft.

[0010] In the above-mentioned two-way non-return transmission mechanism, the inner disk member 2 of the one-way clutch 2 is rotatably supported on the output shaft.

[0011] In the above-mentioned two-way non-return transmission mechanism, the one-way clutch 1 or the one-way clutch 2 is a ratchet pawl clutch or a roller one-way clutch.

[0012] In the above-mentioned bidirectional non-return transmission mechanism, an input disc 1 is fixed on the input shaft, and the input disc 1 is spline-connected with a pressure disc 1.

[0013] In the above-mentioned bidirectional non-return transmission mechanism, the second input disc is fixed on the input shaft, and the second input disc is spline-connected with the second pressure disc.

[0014] The above-mentioned two-way check transmission mechanism, when the input shaft rotates in the opposite direction, the pressure plate 2 moves axially toward the inner plate component 2 to press the inner plate component 2 against the force transfer plate 2, and at the same time, the pressure plate 1 moves axially away from the inner plate component 1, and the torque is transmitted from the input shaft to the output shaft through the pressure plate 2, the inner plate component 2 and the force transfer plate 2, and the output shaft rotates in the opposite direction driven by the input shaft; when the output shaft rotates in the opposite direction for a certain angle, the input shaft stops rotating. At this time, if the output shaft is pre-rotated forwardly together with the force transfer plate 2 and the inner plate component 2 under the drive of an external force, since the inner plate component 2 cannot rotate forwardly relative to the outer member 2, the output shaft cannot rotate forwardly, and at this time, if the output shaft is pre-rotated in the opposite direction under the drive of an external force, the pressure plate 1 will move axially toward the inner plate component 1 to press the inner plate component 1 against the force transfer plate 1, and since the inner plate component 1 cannot rotate in the opposite direction relative to the outer member 1, the output shaft cannot rotate in the opposite direction either.

[0015] The above-mentioned two-way check transmission mechanism is provided with a friction ring 2 between the axially opposite end faces of the inner disk component 2 and the pressure plate 2, or between the axially opposite end faces of the inner disk component 2 and the force transmission plate 2, and the friction ring 2 is positioned on the inner disk component 2, the pressure plate 2 or the force transmission plate 2 in the radial direction; when the input shaft rotates in the opposite direction, the pressure plate 2 moves axially toward the inner disk component 2 to axially compress the inner disk component 2, the friction ring 2 and the force transmission plate 2, and the torque is transmitted from the input shaft to the output shaft via the pressure plate 2, the friction ring 2, the inner disk component 2 and the force transmission plate 2.

[0016] In the above-mentioned two-way check transmission mechanism, the friction plate 1 and the friction plate 2 move axially and are connected to the inner plate component 1 and the inner plate component 2 in the circumferential direction. When the input shaft rotates in a certain direction, the pressure plate 1 moves axially toward the friction plate 1 to press the friction plate 1 against the force transmission plate 1. At the same time, the pressure plate 2 moves axially away from the friction plate 2. The torque is transmitted from the input shaft through the pressure plate 1, the friction plate 1 and the force transmission plate 1 to the output shaft. The output shaft, the friction plate 1 and the inner plate component 1 rotate forwardly under the drive of the input shaft. When the output shaft rotates forwardly by a certain angle, The input shaft stops rotating. At this time, if the output shaft is driven by an external force to rotate in the opposite direction together with the force transfer plate 1, the friction plate 1, and the inner plate component 1, the output shaft cannot rotate in the opposite direction because the inner plate component 1 cannot rotate in the opposite direction relative to the outer component 1. Moreover, at this time, if the output shaft is driven by an external force to rotate in the forward direction, the pressure plate 2 will move axially toward the friction plate 2 to press the friction plate 2 against the force transfer plate 2. Since the inner plate component 2 cannot rotate in the forward direction relative to the outer component 2, the output shaft cannot rotate in the forward direction either.

[0017] In the above-mentioned two-way check transmission mechanism, the outer periphery of the friction plate 1 is connected to the friction plate sleeve 1 through a spline, and the friction plate sleeve 1 is fixedly connected to the inner disc component 1.

[0018] In the above-mentioned two-way check transmission mechanism, a thrust plate is fixed on the outer periphery of a force transmission plate; when the input shaft rotates in a certain direction, the pressure plate moves axially toward the friction plate to press the friction plate against the thrust plate, and the torque is transmitted from the input shaft to the output shaft via the pressure plate, the friction plate, the thrust plate and the force transmission plate, and the output shaft and the inner plate component rotate forward in a certain direction driven by the input shaft; when the output shaft rotates forward by a certain angle, the input shaft stops rotating. At this time, if the output shaft is driven by an external force to rotate in the reverse direction opposite to the forward direction together with the force transmission plate, the thrust plate, the friction plate and the inner plate component, the output shaft cannot rotate in the reverse direction because the inner plate component cannot rotate in the reverse direction relative to the outer member.

[0019] In the above-mentioned two-way check transmission mechanism, the outer periphery of the friction plate 1 is connected to the friction plate sleeve 1 by a spline, and the friction plate sleeve 1 is fixedly connected to the inner plate component 1; the outer periphery of the force transmission plate 1 is connected to the friction plate 1 by a spline; when the input shaft rotates in a certain direction, the pressure plate 1 moves axially toward the friction plate 1 to press the friction plate 1 and the friction plate 1 against the thrust plate 1, and the torque is transmitted from the input shaft to the output shaft through the pressure plate 1, the friction plate 1, the friction plate 1, the thrust plate 1 and the force transmission plate 1, and the output shaft and the inner plate component 1 rotate forward in a certain direction driven by the input shaft; when the output shaft rotates forward by a certain angle, the input shaft stops rotating. At this time, if the output shaft is driven by an external force and rotates in the reverse direction opposite to the forward direction together with the force transmission plate 1, the thrust plate 1, the friction plate 1, the friction plate 1 and the inner plate component 1, the output shaft cannot rotate backward because the inner plate component 1 cannot rotate backward relative to the outer member 1. Therefore, the output shaft cannot rotate backward.

[0020] The above-mentioned two-way non-return transmission mechanism has a plurality of friction discs 1 and a plurality of friction plates 1, which are arranged alternately in the axial direction.

[0021] The above-mentioned two-way non-return transmission mechanism, the fixedly connected friction plate sleeve and the inner disc component are rotatably supported on the output shaft or the housing.

[0022] In the above-mentioned bidirectional check transmission mechanism, an input disc 1 is fixed on the input shaft, and a pressure plate 1 is connected to the input disc 1 through a guide pin 1 so as to be axially movable relative to the input disc 1; an elastic element 1 is provided between the pressure plate 1 and the input disc 1 for pushing the pressure plate 1 to move axially along the guide pin 1 toward the friction plate 1.

[0023] In the above-mentioned two-way non-return transmission mechanism, the one-way clutch is a ratchet pawl clutch.

[0024] In the above-mentioned two-way non-return transmission mechanism, the one-way clutch 1 is a roller type one-way clutch.

[0025] The above-mentioned two-way check transmission mechanism, when the input shaft rotates in the opposite direction, the pressure plate 2 moves axially toward the friction plate 2 to press the friction plate 2 against the force transfer plate 2, and at the same time, the pressure plate 1 moves axially away from the friction plate 1, and the torque is transmitted from the input shaft to the output shaft through the pressure plate 2, the friction plate 2 and the force transfer plate 2, and the output shaft and the inner plate component 2 rotate in the opposite direction driven by the input shaft; when the output shaft rotates in the opposite direction for a certain angle, the input shaft stops rotating. At this time, if the output shaft rotates forward together with the force transfer plate 2, the friction plate 2 and the inner plate component 2 under the drive of external force, since the inner plate component 2 cannot rotate forward relative to the outer component 2, the output shaft cannot rotate forward. At this time, if the output shaft rotates in the reverse direction under the drive of external force, the pressure plate 1 will move axially toward the friction plate 1 to press the friction plate 1 against the force transfer plate 1. Since the inner plate component 1 cannot rotate in the opposite direction relative to the outer component 1, the output shaft cannot rotate in the opposite direction either.

[0026] In the above-mentioned two-way check transmission mechanism, thrust plate 2 is fixed on the outer periphery of force transfer plate 2; when the input shaft rotates in the opposite direction, pressure plate 2 moves axially toward friction plate 2 to press friction plate 2 against thrust plate 2, and torque is transmitted from the input shaft to the output shaft via pressure plate 2, friction plate 2, thrust plate 2 and force transfer plate 2, and the output shaft and inner plate component 2 rotate in the opposite direction driven by the input shaft; when the output shaft rotates in the opposite direction for a certain angle, the input shaft stops rotating. At this time, if the output shaft is driven by external force to rotate forward together with force transfer plate 2, thrust plate 2, friction plate 2 and inner plate component 2, the output shaft cannot rotate forward because inner plate component 2 cannot rotate forward relative to outer peripheral component 2.

[0027] In the above-mentioned two-way check transmission mechanism, the outer periphery of the second friction plate is connected to the second friction plate sleeve by a spline, and the second friction plate sleeve is fixedly connected to the second inner disc component; the outer periphery of the second force transmission plate is connected to the second friction plate by a spline; when the input shaft rotates in the opposite direction, the second pressure plate moves axially toward the second friction plate to press the second friction plate and the second friction plate against the second thrust plate, and the torque is transmitted from the input shaft to the output shaft via the second pressure plate, the second friction plate, the second friction plate, the second thrust plate and the second force transmission plate, and the output shaft and the second inner disc component rotate in the opposite direction driven by the input shaft; when the output shaft rotates in the opposite direction by a certain angle, the input shaft stops rotating. At this time, if the output shaft is driven by an external force to rotate forward together with the second force transmission plate, the second thrust plate, the second friction plate, the second friction plate and the second inner disc component, the output shaft cannot rotate forward because the second inner disc component cannot rotate forward relative to the second outer component.

[0028] The above-mentioned two-way non-return transmission mechanism has a plurality of friction discs 2 and a plurality of friction plates 2, which are arranged alternately in the axial direction.

[0029] In the above-mentioned two-way non-return transmission mechanism, the fixedly connected friction plate sleeve 2 and the inner disc component 2 are rotatably supported on the output shaft or the housing.

[0030] In the above-mentioned bidirectional check transmission mechanism, input disc 2 is fixed on the input shaft, and pressure plate 2 is connected to input disc 2 through guide pin 2 so as to be axially movable relative to input disc 2; elastic element 2 is provided between pressure plate 2 and input disc 2 for pushing pressure plate 2 to move axially along guide pin 2 toward friction plate 2.

[0031] In the above-mentioned two-way non-return transmission mechanism, the second one-way clutch is a ratchet pawl clutch.

[0032] In the above-mentioned two-way non-return transmission mechanism, the second one-way clutch is a roller type one-way clutch.

[0033] This patent also provides an electric cylinder, which does not require the motor to be powered when a certain working state needs to be maintained, thus reducing energy consumption and preventing the motor from overheating. The electric cylinder is particularly suitable for battery-powered electric vehicles, especially heavy-load electric engineering vehicles.

[0034] The electric cylinder includes a motor and a reciprocating piston rod, and also includes the bidirectional non-return transmission mechanism. The motor shaft is connected to the input shaft in the bidirectional non-return transmission mechanism, and the output shaft in the bidirectional non-return transmission mechanism is connected to the piston rod through a transmission device to drive the piston rod to reciprocate.

[0035] The method of using the electric cylinder is that the motor shaft rotates in a certain direction to drive the piston rod to move to a certain position; then the motor loses power and the piston rod remains in the position.

[0036] Beneficial effects of this patent: In this patent, when the input shaft rotates in a certain direction, it drives the output shaft to rotate in the forward direction, and when the input shaft rotates in the opposite direction, it drives the output shaft to rotate in the reverse direction. It can be that the input shaft rotates clockwise to drive the output shaft to rotate in the forward direction, and the input shaft rotates counterclockwise to drive the output shaft to rotate in the reverse direction; it can also be that the input shaft rotates counterclockwise to drive the output shaft to rotate in the forward direction, and the input shaft rotates clockwise to drive the output shaft to rotate in the reverse direction.

[0037] For the convenience of description, we describe the rotation of the input shaft in a certain direction when driving the output shaft to rotate in the forward direction as the forward rotation of the input shaft, and describe the rotation of the input shaft when driving the output shaft to rotate in the reverse direction as the reverse rotation of the input shaft.

[0038] The rotation direction of the input shaft when it rotates forward may be the same as the rotation direction of the output shaft when it rotates forward, such as when the input shaft rotates forward is clockwise, the output shaft rotates forward is clockwise; or they may be different, such as when the input shaft rotates forward is clockwise, the output shaft rotates forward is counterclockwise.

[0039] The positive rotation direction of the input shaft must be opposite to the reverse rotation direction of the input shaft. If the positive rotation direction of the input shaft is clockwise, the reverse rotation direction of the input shaft is counterclockwise.

[0040] The positive rotation direction of the output shaft must be opposite to the reverse rotation direction of the output shaft. If the positive rotation direction of the output shaft is clockwise, the reverse rotation direction of the output shaft is counterclockwise.

[0041] The inner disk component 1 can rotate relative to the outer component 1 when the positive rotation direction is the same as the output shaft, that is, the inner disk component 1 can rotate positively relative to the outer component 1, and the inner disk component 1 cannot rotate reversely relative to the outer component 1; for example, if the positive rotation direction of the output shaft is clockwise, the inner disk component 1 can rotate clockwise relative to the outer component 1, and the inner disk component 1 cannot rotate counterclockwise relative to the outer component 1. The inner disk component 2 can rotate relative to the outer component 2 when the reverse rotation direction is the same as the output shaft, that is, the inner disk component 2 can rotate reversely relative to the outer component 2, and the inner disk component 2 cannot rotate positively relative to the outer component 2. For example, if the positive rotation direction of the output shaft is clockwise and the reverse rotation direction is counterclockwise, the inner disk component 2 can rotate counterclockwise relative to the outer component 2, and the inner disk component 2 cannot rotate clockwise relative to the outer component 2.

[0042] When using the two-way check transmission mechanism, if the output shaft needs to rotate in the forward direction, the input shaft rotates in the forward direction, and the pressure plate 2 moves axially to disengage from the force transmission plate 2 and the inner plate component 2. At the same time, the pressure plate 1 moves axially to press the force transmission plate 1 and the inner plate component 1, so that the pressure plate 1, the force transmission plate 1 and the inner plate component 1 form a friction transmission structure that can transmit torque. The torque is transmitted from the input shaft to the output shaft through the pressure plate 1, the inner plate component 1, the force transmission plate 1, etc., and the output shaft rotates in the forward direction driven by the input shaft. When the output shaft rotates in the forward direction for a certain angle, the input shaft stops rotating. At this time, if the output shaft is driven by external force and is in contact with the transmission plate 1, the output shaft When the force plate 1 and the inner plate component 1 are pre-rotated in the reverse direction, since the pressure plate 1, the force transfer plate 1 and the inner plate component 1 form a friction transmission structure for transmitting torque, and the inner plate component 1 cannot rotate in the reverse direction relative to the outer member 1, the output shaft cannot rotate in the reverse direction. At this time, if the output shaft is pre-rotated in the forward direction driven by an external force, the pressure plate 2 will move axially to press the force transfer plate 2 and the inner plate component 2, so that the pressure plate 2, the force transfer plate 2 and the inner plate component 2 form a friction transmission structure that can transmit torque, and since the inner plate component 2 cannot rotate in the forward direction relative to the outer member 2, the output shaft cannot rotate in the forward direction either.

[0043] When the input shaft rotates in the opposite direction, the pressure plate 1 moves axially and disengages from the force transfer plate 1 and the inner plate component 1, and at the same time, the pressure plate 2 moves axially and presses the force transfer plate 2 and the inner plate component 2, so that the pressure plate 2, the force transfer plate 2 and the inner plate component 2 form a friction transmission structure capable of transmitting torque. The torque is transmitted from the input shaft to the output shaft through the pressure plate 2, the inner plate component 2 and the force transfer plate 2, and the output shaft rotates in the opposite direction driven by the input shaft; when the output shaft rotates in the opposite direction for a certain angle, the input shaft stops rotating. At this time, the output shaft, driven by an external force, is pre-rotated together with the force transfer plate 2 and the inner plate component 2. During forward rotation, since the inner disk component 2 cannot rotate forwardly relative to the outer disk component 2, the friction transmission structure capable of transmitting torque formed by the output shaft, the force transfer plate 2 and the inner disk component 2 cannot rotate forwardly. Moreover, at this time, if the output shaft is driven by an external force to rotate in the reverse direction, the pressure plate 1 will move axially to press the force transfer plate 1 and the inner disk component 1, so that the pressure plate 1, the force transfer plate 1 and the inner disk component 1 form a friction transmission structure capable of transmitting torque. Since the inner disk component 1 cannot rotate in the reverse direction relative to the outer disk component 1, the output shaft cannot rotate in the reverse direction either.

[0044] In the process of the input shaft rotating forward to transmit torque to the output shaft, the pressure plate 1 moves axially, and the pressure plate 1, the force transfer plate 1, and the inner plate component 1 are gradually pressed together to form a friction transmission structure for transmitting torque, and the torsion on the output shaft gradually increases, so the output shaft rotates smoothly in the forward direction. In the process of the input shaft rotating reversely to transmit torque to the output shaft, the pressure plate 2 moves axially, and the pressure plate 2, the force transfer plate 2, and the inner plate component 2 are gradually pressed together to form a friction transmission structure for transmitting torque, and the torsion on the output shaft gradually increases, and the output shaft rotates smoothly in the reverse direction.

[0045] For example, when a two-way check transmission mechanism containing an axially movable inner disc component 1 and an inner disc component 2 is used, if the output shaft needs to rotate in the positive direction, the input shaft rotates in the positive direction, the pressure plate 2 moves axially away from the inner disc component 2, and the pressure plate 1 moves axially toward the inner disc component 1 to press the inner disc component 1 against the force transmission plate 1. Then, the pressure plate 1 and the inner disc component 1 cannot move axially but can only rotate, and the torque is transmitted from the input shaft to the output shaft through the pressure plate 1, the inner disc component 1, the force transmission plate 1, etc., and the output shaft and the inner disc component 1 rotate in the positive direction driven by the input shaft. When the output shaft rotates in the positive direction for a certain angle, , the input shaft stops rotating. At this time, if the output shaft is driven by an external force to rotate in the reverse direction together with the force transfer plate 1 and the inner plate component 1, since the inner plate component 1 cannot rotate in the reverse direction relative to the outer member 1, the output shaft, the force transfer plate 1 and the inner plate component 1 axially pressed together cannot rotate in the reverse direction. Moreover, at this time, if the output shaft is driven by an external force to rotate in the forward direction, the pressure plate 2 will move axially toward the inner plate component 2 to press the inner plate component 2 against the force transfer plate 2. Since the inner plate component 2 cannot rotate in the forward direction relative to the outer member 2, the output shaft cannot rotate in the forward direction either.

[0046] When the input shaft rotates in the opposite direction, the pressure plate 1 moves axially away from the inner plate component 1, and the pressure plate 2 moves axially toward the inner plate component 2 to press the inner plate component 2 against the force transfer plate 2. Then, the pressure plate 2 and the inner plate component 2 cannot move axially but can only rotate. The torque is transmitted from the input shaft through the pressure plate 2, the inner plate component 2 and the force transfer plate 2 to the output shaft, and the output shaft rotates in the opposite direction driven by the input shaft. When the output shaft rotates in the opposite direction for a certain angle, the input shaft stops rotating. At this time, if the output shaft is pre-rotated forwardly together with the force transfer plate 2 and the inner plate component 2 under the driving force of an external force, since the inner plate component 2 cannot rotate forwardly relative to the outer member 2, the output shaft, the force transfer plate 2 and the inner plate component 2 that are axially pressed together cannot rotate forwardly. Moreover, at this time, if the output shaft is pre-rotated in the opposite direction under the driving force of an external force, the pressure plate 1 will move axially toward the inner plate component 1 to press the inner plate component 1 against the force transfer plate 1. Since the inner plate component 1 cannot rotate in the opposite direction relative to the outer member 1, the output shaft cannot rotate in the opposite direction either.

[0047] A friction ring 1 is arranged between the axially opposite end faces of the inner disc member 1 and the pressure plate 1, or between the axially opposite end faces of the inner disc member 1 and the force transfer plate 1. The friction coefficient between the friction ring 1 and the inner disc member 1 and the pressure plate 1 is relatively large, which can improve the reliability of torque transmission between the inner disc member 1 and the force transfer plate 1. Similarly, a friction ring 2 is arranged between the axially opposite end faces of the inner disc member 2 and the pressure plate 2, or between the axially opposite end faces of the inner disc member 2 and the force transfer plate 2.

[0048] For another example, when using a bidirectional check transmission mechanism composed of friction plate 1, friction plate 2, etc., if the output shaft needs to rotate in the positive direction, the input shaft rotates in the positive direction, and pressure plate 2 moves axially away from friction plate 2. After pressure plate 1 moves axially toward friction plate 1 to press friction plate 1 against force transfer plate 1, pressure plate 1 and friction plate 1 cannot move axially and can only rotate. Moreover, friction plate 1 is connected to inner plate component 1 in the circumferential direction for force transmission, so inner plate component 1 also rotates with friction plate 1. The torque is transmitted from the input shaft to the output shaft through pressure plate 1, friction plate 1, force transfer plate 1, etc., and the output shaft, friction plate 1, and inner plate component 1 are driven by the input shaft. Forward rotation; when the output shaft rotates forwardly for a certain angle, the input shaft stops rotating. At this time, if the output shaft is driven by an external force to rotate in the reverse direction together with the force transfer plate 1, the friction plate 1, and the inner plate component 1, since the inner plate component 1 cannot rotate in the reverse direction relative to the outer component 1, the output shaft cannot rotate in the reverse direction. At this time, if the output shaft is driven by an external force to rotate forwardly, the pressure plate 2 will move axially toward the friction plate 2 to press the friction plate 2 against the force transfer plate 2. Since the friction plate 2 is connected to the inner plate component 2 in the circumferential force transmission direction, and the inner plate component 2 cannot rotate forwardly relative to the outer component 2, the output shaft cannot rotate forwardly either.

[0049] When the input shaft rotates in the opposite direction, the pressure plate 1 moves axially away from the friction plate 1, and the pressure plate 2 moves axially toward the friction plate 2 to press the friction plate 2 against the force transfer plate 2. The pressure plate 2 and the friction plate 2 cannot move axially but can only rotate. Moreover, the friction plate 2 is connected to the inner plate component 2 in the circumferential direction, so the inner plate component 2 also rotates with the friction plate 2. The torque is transmitted from the input shaft to the output shaft through the pressure plate 2, the friction plate 2, the force transfer plate 2, etc. The output shaft, the friction plate 2, and the inner plate component 2 rotate in the opposite direction driven by the input shaft. When the output shaft rotates in the opposite direction for a certain angle, the input The shaft stops rotating. At this time, if the output shaft rotates forward together with the force transfer plate 2, the friction plate 2 and the inner plate component 2 under the drive of external force, the output shaft cannot rotate forward because the inner plate component 2 cannot rotate forward relative to the outer component 2. Moreover, at this time, if the output shaft rotates in the reverse direction under the drive of external force, the pressure plate 1 will move axially toward the friction plate 1 to press the friction plate 1 against the force transfer plate 1. Since the friction plate 1 is connected to the inner plate component 1 in the circumferential force transmission direction and the inner plate component 1 cannot rotate in the reverse direction relative to the outer component 1, the output shaft cannot rotate in the reverse direction either.

[0050] The elastic element can axially compress the pressure plate, the friction plate, the force transmission plate, etc. to improve the reliability of the transmission.

[0051] The bidirectional non-return transmission mechanism comprises an inner disk component 1 and an inner disk component 2 which can be axially moved, or a bidirectional non-return transmission mechanism composed of a friction plate 1 and a friction plate 2, etc., has high transmission efficiency and reliable structure.

[0052] The one-way clutch 1 and the one-way clutch 2 are prior art, such as a ratchet pawl clutch or a roller type one-way clutch.

[0053] The input shaft can drive the pressure plate 1 to rotate, but the pressure plate 1 can move axially. For example, the input shaft can be spline-connected to the pressure plate 1. Of course, the input plate 1 can also be fixed on the input shaft, and the input plate 1 is spline-connected to the pressure plate 1.

[0054] In the electric cylinder of this patent, the motor is connected to the piston rod through a two-way check transmission mechanism, a transmission device, etc. to drive the piston rod to move back and forth. The transmission device belongs to the prior art and will not be described again. As long as it can convert the rotation of the output shaft into the axial movement of the piston rod, it can be used. The transmission device is generally a reduction mechanism. When the electric cylinder is working, the motor shaft rotates in a certain direction, and the piston rod moves forward to a certain position to reach the working state; when it is necessary to maintain the working state, the motor can be powered off, not only does not consume electrical energy, but the motor will not overheat. At this time, the output shaft cannot rotate forward or reverse, and the piston rod will not move; when the electric cylinder stops working, the motor shaft rotates in the opposite direction, and the piston rod retreats backward. When the output shaft rotates in the opposite direction, if the output shaft has a load reaction force, the pressure plate, under the action of the spiral structure, reduces the pressing force acting on the force transmission plate and the inner plate component, and the friction force is reduced. When it is reduced to less than the force acting on the friction surface by the load, the output shaft rotates under the action of the load. If there is no reaction force from the load, the clamping force exerted by the pressure plate on the force transfer plate and the inner plate components increases, the friction force increases, and the motor drives the output shaft to reverse. BRIEF DESCRIPTION OF THE DRAWINGS

[0055] Figure 1 is a schematic diagram of the electric cylinder of Example 1;

[0056] Figure 2 It is a schematic diagram of a motor, a bidirectional non-return transmission mechanism, etc.;

[0057] Figure 3 It is a schematic diagram of one-way transmission mechanism 1 and one-way transmission mechanism 2 (pressure plate 1 is in contact with friction plate 1, and pressure plate 2 is separated from friction plate 2);

[0058] Figure 4 It is a schematic diagram of one-way transmission mechanism 1 and one-way transmission mechanism 2 (pressure plate 1 is separated from friction plate 1, and pressure plate 2 is in contact with friction plate 2);

[0059] Figure 5 It is a schematic diagram of a one-way transmission mechanism;

[0060] Figure 6 is a schematic diagram of a one-way transmission mechanism II;

[0061] Figure 7It is a three-dimensional diagram of a portion of a friction plate 1, a friction plate sleeve 1, a one-way clutch 1 (or a portion of a friction plate 2, a friction plate sleeve 2, a one-way clutch 2), etc.;

[0062] Figure 8 is another stereoscopic view of a portion of a friction plate 1, a friction plate sleeve 1, a one-way clutch 1 (or a portion of a friction plate 2, a friction plate sleeve 2, a one-way clutch 2), etc.;

[0063] Fig. 9 It is a three-dimensional diagram of friction disc one (or friction disc two);

[0064] Fig.10 It is a three-dimensional diagram of friction plate 1 (or friction plate 2);

[0065] Fig.11 Schematic diagram of a bidirectional non-return transmission mechanism of Embodiment 2;

[0066] Fig.12 is a schematic diagram of an electric cylinder of Embodiment 3;

[0067] Fig.13 It is a schematic diagram of a motor, a bidirectional non-return transmission mechanism, etc.;

[0068] Fig.14 It is a first-class schematic diagram of a one-way transmission mechanism;

[0069] Fig.15 yes Fig.14 CC profile of ;

[0070] Fig.16 Schematic diagram of the bidirectional non-return transmission mechanism of Example 4.

[0071] In the figure, the motor 100, the motor shaft 101, the rotor 102, the piston rod 300, the two-way check transmission mechanism 400, the one-way transmission mechanism 1 401, the one-way transmission mechanism 2 402, the transmission device 500, the input gear 600,

[0072] Input shaft 1, output shaft 2, housing 10,

[0073] Input disc 11, pressure plate 12, friction ring 13, friction plate 19, inner disc component 14, force transmission disc 15, thrust plate 16, bearing 17, friction disc 18, guide pin 21, elastic element 22, friction plate sleeve 23, peripheral component 24, roller 25,

[0074] Input disc 2 31, pressure plate 2 32, friction ring 2 33, friction plate 2 39, inner disc component 2 34, force transmission disc 2 35, thrust plate 2 36, bearing 2 37, friction disc 2 38, guide pin 2 41, elastic element 2 42, friction plate sleeve 2 43, peripheral component 2 44, roller 2 45,

[0075] Gear 1 51, gear 2 52, gear 3 53, gear 4 54, transition shaft 55, lead screw 56, nut 57. DETAILED DESCRIPTION

[0076] In the detailed description, the axial direction of the output shaft, viewed from left to right, is used as a reference for determining the counterclockwise or clockwise rotation direction. Example 1

[0077] Embodiment 1 (electric cylinder, bidirectional non-return transmission mechanism composed of friction plate 1, friction plate 2, etc.):

[0078] See also Figure 1-10 As shown, the electric cylinder includes a motor 100, a reciprocating piston rod 300, and a bidirectional non-return transmission mechanism 400. The output shaft 2 in the bidirectional non-return transmission mechanism is connected to the piston rod 300 through a transmission device 500 to drive the piston rod to reciprocate.

[0079] The transmission device 500 includes a gear 51 fixed on the output shaft 2, a transition shaft 55 rotatably supported on the housing, a gear 2 52 and a gear 3 53 arranged on the transition shaft 55 and meshing with the gear 1, a gear 4 54 meshing with the gear 3 53, and the gear 4 54 is fixed to a screw 56 rotatably supported on the housing. The screw 56 cooperates with a nut 57 fixed on the piston rod 300 through a thread, and the piston rod 300 is arranged on the housing so that it can only move in the axial direction.

[0080] See also Figure 4 , 5 , a two-way check transmission mechanism 400 comprises an input shaft 1, an output shaft 2, a housing 10, a one-way transmission mechanism 401 (including an input disc 11, a pressure plate 12, a friction plate 19, an inner disc component 14, a force transmission disc 15, a thrust plate 16, a bearing 17, a friction disc 18, a guide pin 21, an elastic element 22, a friction plate sleeve 23, a peripheral component 24, etc.), and a one-way transmission mechanism 402 (including an input disc 31, a pressure plate 32, a friction plate 39, an inner disc component 34, a force transmission disc 35, a thrust plate 36, a bearing 37, a friction disc 38, a guide pin 41, an elastic element 42, a friction plate sleeve 43, a peripheral component 44, etc.).

[0081] See also Figure 5 The roller-type one-way clutch 1 includes an outer member 24, a roller 25, an inner disk member 14, etc., and the roller-type one-way clutch 2 includes an outer member 44, a roller 45, an inner disk member 34, etc., which are all related to the prior art. The outer member 24 and the outer member 44 are fixed on the housing 10. The inner disk member 14 cannot rotate clockwise relative to the outer member 24, and the inner disk member 34 cannot rotate counterclockwise relative to the outer member 44.

[0082] See also Figure 2 The motor 100 includes a motor shaft 101 fixed on a rotor 102, and both ends of the motor shaft 101 are rotatably arranged on the motor housing, and both ends of the motor housing are fixed on the housing 10. The motor shaft 101 is the input shaft 1 of the two-way backstop transmission mechanism 400. The output shaft 2 passes through the hollow input shaft 1, and both ends are rotatably supported on the inner disk component 1 (or the one-way rotating sleeve 1 formed by the fixed connection of the friction plate sleeve 1 and the inner disk component 1) and the inner disk component 2 (the one-way rotating sleeve 2 formed by the fixed connection of the friction plate sleeve 2 and the inner disk component 2) through bearings. The one-way rotating sleeve 1 and the one-way rotating sleeve 2 are rotatably supported on the housing 10 through bearings.

[0083] The output shaft is provided with a pressure plate 12 and a pressure plate 2 32 which cooperate with the output shaft in a left-handed spiral line. When the input shaft rotates counterclockwise, the pressure plate 12 and the pressure plate 2 32 both move to the right. When the input shaft rotates clockwise, the pressure plate 12 and the pressure plate 2 32 both move to the left. A force transmission plate 15 and a force transmission plate 2 35 are fixed on the output shaft.

[0084] An input disc 11 is fixed on the input shaft, a guide pin 1 is fixed on the input disc 11, a pressure plate 12 is axially slidably arranged on the guide pin 1, and an elastic element 1 is arranged between the pressure plate 12 and the input disc 11 for pushing the pressure plate 12 to move axially along the guide pin 1 toward the friction plate 19.

[0085] There are multiple friction discs 18 and friction plates 19, which are arranged alternately in the axial direction. The outer periphery of the friction plate 19 is connected to the friction plate sleeve 23 through a spline, and the friction plate sleeve 23 is fixedly connected to the inner plate component 14 to form a one-way rotating sleeve; the outer periphery of the force transmission plate 15 is connected to the friction disc 18 through a spline. The thrust plate 16 is fixed on the outer periphery of the force transmission plate 15; the pressure plate 12 and the thrust plate 16 are located on both sides of the friction disc 18 and the friction plate 19 which are arranged alternately in the axial direction.

[0086] See also Figure 6-8 An input disc 2 31 is fixed on the input shaft, a guide pin 2 is fixed on the input disc 2 31, a pressure plate 2 32 is axially slidably arranged on the guide pin 2, and an elastic element 2 is arranged between the pressure plate 2 32 and the input disc 2 31 for pushing the pressure plate 2 32 to move axially along the guide pin 2 toward the friction plate 2 39.

[0087] There are multiple friction discs 38 and friction plates 39, which are arranged alternately in the axial direction. The outer periphery of the friction plate 39 is connected to the friction plate sleeve 43 through a spline, and the friction plate sleeve 43 is fixedly connected to the inner plate member 34 to form a one-way rotating sleeve 2; the outer periphery of the force transmission plate 35 is connected to the friction disc 38 through a spline. The thrust plate 36 is fixed on the outer periphery of the force transmission plate 35; the pressure plate 32 and the thrust plate 36 are located on both sides of the friction disc 38 and the friction plate 39, which are arranged alternately in the axial direction.

[0088] When the input shaft rotates counterclockwise, the pressure plate 32 moves axially to the right and leaves the friction plate 39. At the same time, the pressure plate 12 moves axially to the right to press the friction plate 19 and the friction plate 18 against the thrust plate 16. The torque is transmitted from the input shaft, the input plate 11, the pressure plate 12, the friction plate 19, the friction plate 18, the thrust plate 16, the force transfer plate 15, etc. to the output shaft. The output shaft and the inner plate component 14 rotate counterclockwise under the drive of the input shaft. When the output shaft rotates counterclockwise for a certain angle, the input shaft stops rotating. At this time, the output shaft is driven by external force to rotate with the force transfer plate 15, the thrust plate 16, the friction plate 18, the friction plate 18, the friction plate 19, the friction plate 18, the thrust plate 16 ... 19. When the inner disk component 14 is pre-rotated clockwise, since the inner disk component 14 cannot rotate clockwise relative to the outer component 24, the output shaft cannot rotate clockwise; and at this time, if the output shaft is pre-rotated counterclockwise under the drive of external force, the pressure plate 2 32 will move axially toward the friction plate 2 39 to axially compress the friction plate 2 39, the friction plate 2 38, and the thrust plate 2 36. Since the friction plate 2 38 is connected to the force transfer plate 2 35 in the circumferential direction, the friction plate 2 39 is connected to the inner disk component 2 34 in the circumferential direction, and the inner disk component 2 34 cannot rotate counterclockwise relative to the outer component 2 44, the output shaft cannot rotate counterclockwise either. When the input shaft rotates clockwise, the pressure plate 12 moves axially to the left and leaves the friction plate 19. At the same time, the pressure plate 2 32 moves axially to the left to press the friction plate 2 39 and the friction plate 2 38 against the thrust plate 2 36. The torque is transmitted from the input shaft, the input plate 2 31, the pressure plate 2 32, the friction plate 2 39, the friction plate 2 38, the thrust plate 2 36, the force transfer plate 2 35, etc. to the output shaft. The output shaft and the inner plate component 2 34 rotate clockwise under the drive of the input shaft. When the output shaft rotates clockwise for a certain angle, the input shaft stops rotating. At this time, the output shaft, driven by external force, rotates with the force transfer plate 2 35, the thrust plate 2 36, the friction plate 2 38, the friction plate 2 3 9. When the inner disc member 34 is pre-rotated counterclockwise, since the inner disc member 34 cannot rotate counterclockwise relative to the outer member 44, the output shaft cannot rotate counterclockwise; and at this time, if the output shaft is pre-rotated clockwise under the drive of external force, the pressure plate 12 will move axially to the right toward the friction plate 19 to axially compress the friction plate 19, the friction plate 18, and the thrust plate 16. Since the friction plate 18 is connected to the force transmission plate 15 in the circumferential direction, the friction plate 19 is connected to the inner disc member 14 in the circumferential direction, and the inner disc member 14 cannot rotate clockwise relative to the outer member 24, the output shaft cannot rotate clockwise either.

[0089] As mentioned above, when the motor shaft rotates counterclockwise, the output shaft rotates counterclockwise, and through the transmission of gear 1 51, gear 2 52, gear 3 53, and gear 4 54, the lead screw 56 is driven to rotate, and through the cooperation with the nut 57, the piston rod 300 is driven to move left; when the motor shaft rotates clockwise, the piston rod 300 is driven to move right. The left and right movement of the piston rod pushes or pulls up the movable arm, so that the movable arm reaches a certain position. When the piston rod and the movable arm reach a certain position, the motor is powered off, and there is no need for the motor to provide torque. The piston rod and the movable arm will not move under the action of external force and remain in this state. Example 2

[0090] The bidirectional non-return transmission mechanism 400 in Example 2 is shown in FIG. Fig.11 The structure and principle of the bidirectional non-return transmission mechanism are basically the same as those of the first embodiment, and both of them include an input shaft 1, an output shaft 2, a housing 10, a one-way transmission mechanism 1 401, and a one-way transmission mechanism 2 402. The main difference is that the input shaft 1 in the second embodiment is a gear shaft of an input gear 600 (the input shaft in the first embodiment is the motor shaft 101 of the motor 100), so that the output shaft 2 can be driven to rotate by the input shaft 1 through the clockwise or counterclockwise rotation of the input gear 600. Example 3

[0091] Embodiment 3 (electric cylinder, bidirectional non-return transmission mechanism including axially movable inner disk component 1 and inner disk component 2):

[0092] See also Figure 12-15 As shown, the electric cylinder includes a motor 100, a reciprocating piston rod 300, and a bidirectional non-return transmission mechanism 400. The output shaft 2 in the bidirectional non-return transmission mechanism is connected to the piston rod 300 through a transmission device 500 to drive the piston rod to reciprocate.

[0093] See also Fig.13 The transmission device 500 includes a gear 1 51 fixed on the output shaft 2, a transition shaft 55 rotatably supported on the housing, a gear 2 52 and a gear 3 53 arranged on the transition shaft 55 and meshing with the gear 1, a gear 4 54 meshing with the gear 3 53, and the gear 4 54 is fixed to a lead screw 56 rotatably supported on the housing. The lead screw 56 cooperates with a nut 57 fixed on the piston rod 300 through a thread, and the piston rod 300 is arranged on the housing so as to be movable only in the axial direction.

[0094] The bidirectional check transmission mechanism 400 comprises an input shaft 1, an output shaft 2, a housing 10, a one-way transmission mechanism 1 401 (comprising an input disc 11, a pressure plate 12, a friction ring 13, an inner disc component 14, a force transmission disc 15, a bearing 17, a peripheral component 24, etc.), and a one-way transmission mechanism 2 402 (comprising an input disc 2 31, a pressure plate 2 32, a friction ring 2 33, an inner disc component 2 34, a force transmission disc 2 35, a bearing 2 37, a peripheral component 2 44, a roller 2 45, etc.).

[0095] See also Fig.14 , 15 The roller-type one-way clutch 1 includes an outer member 24, a roller 25, an inner disk member 14, etc., and the roller-type one-way clutch 2 includes an outer member 44, a roller 45, an inner disk member 34, etc., which are all related to the prior art. The outer member 24 and the outer member 44 are fixed on the housing 10. The inner disk member 14 can rotate clockwise relative to the outer member 24, but cannot rotate counterclockwise relative to the outer member 24. The inner disk member 34 can rotate counterclockwise relative to the outer member 44, but cannot rotate clockwise relative to the outer member 44.

[0096] The motor 100 includes a motor shaft 101 fixed on a rotor 102, and both ends of the motor shaft 101 are rotatably arranged on the motor housing, and both ends of the motor housing are fixed on the housing 10. The motor shaft 101 is the input shaft 1 of the two-way check transmission mechanism 400. The output shaft 2 passes through the hollow input shaft 1, and both ends are rotatably supported on the housing 10 through bearings.

[0097] An input disc 11 is fixed on the right end of the input shaft 1, and the input disc 11 is spline-connected with a pressure plate 12 in the circumferential direction.

[0098] A pressure plate 12 is arranged on the right part of the output shaft 2 and matches the output shaft 2 in a right-handed spiral line, and a force transmission plate 15 is fixed on the right part of the output shaft 2; the roller type one-way clutch comprises an outer member 24 fixed on the housing, and an inner plate member 14 that can only rotate clockwise relative to the outer member 24; the inner plate member 14 is rotatably supported on the output shaft 2 through a bearing. The inner plate member 14 can move axially relative to the outer member 24.

[0099] A friction ring 13 is arranged between the axially opposite end faces of the inner disc member 14 and the pressure plate 12, and between the axially opposite end faces of the inner disc member 14 and the force transfer plate 15. The friction ring 13 between the inner disc member 14 and the pressure plate 12 is positioned on the pressure plate 12 in the radial direction, and the friction ring 13 between the inner disc member 14 and the force transfer plate 15 is positioned on the force transfer plate 15 in the radial direction.

[0100] An input disc 2 31 is fixed on the left end of the input shaft 1 , and the input disc 2 31 is spline-connected with a pressure disc 2 32 in the circumferential direction.

[0101] A pressure plate 2 32 is arranged on the left side of the output shaft 2 and matches the output shaft 2 in a right-handed spiral line, and a force transmission plate 2 35 is fixed on the left side of the output shaft 2; the roller-type one-way clutch 2 includes an outer member 2 fixed on the housing, and an inner plate member 2 34 that can only rotate counterclockwise relative to the outer member 2; the inner plate member 2 34 is rotatably supported on the output shaft 2 through a bearing 2. The inner plate member 2 34 can move axially relative to the outer member 2.

[0102] The inner disk component 1 of one-way clutch 1 can move axially relative to the outer component 1, and the inner disk component 1 of one-way clutch 1 is rotatably supported on the output shaft; the inner disk component 2 of one-way clutch 2 can move axially relative to the outer component 2; the inner disk component 2 of one-way clutch 2 is rotatably supported on the output shaft, and the structure is more simplified.

[0103] A friction ring 2 33 is arranged between the axially opposite end faces of the inner disc component 2 34 and the pressure plate 2 32, and between the axially opposite end faces of the inner disc component 2 34 and the force transfer plate 2 35. The friction ring 2 33 between the inner disc component 2 34 and the pressure plate 2 32 is positioned on the pressure plate 2 32 in the radial direction, and the friction ring 2 33 between the inner disc component 2 34 and the force transfer plate 2 35 is positioned on the force transfer plate 2 35 in the radial direction.

[0104] The motor shaft rotates clockwise, driving the input shaft 1 and the input disc 11 to rotate clockwise, the pressure plate 2 32 moves axially to the right and leaves the inner disc component 2 34, and the pressure plate 12 moves axially to the right toward the inner disc component 14 to press the friction ring 13 and the inner disc component 14 onto the force transmission disc 15. Then, the pressure plate 12, the friction ring 13 and the inner disc component 14 cannot move axially and can only rotate. The torque is transmitted from the input shaft 1 to the output shaft 2 through the pressure plate 12, the friction ring 13 between the inner disc component 14 and the pressure plate 12, the inner disc component 14, the friction ring 13 between the inner disc component 14 and the force transmission disc 15, and the force transmission disc 15. The output shaft 2 rotates clockwise under the drive of the input shaft 1. When the output shaft 2 rotates clockwise for a certain angle, the input shaft 1 stops rotating. At this time, if the output shaft 2 is driven by an external force to rotate counterclockwise together with the force transfer disc 15 and the inner disc component 14, since the inner disc component 14 cannot rotate counterclockwise relative to the outer member 24, the output shaft 2, friction ring 13, force transfer disc 15 and inner disc component 14 axially pressed together cannot rotate counterclockwise. Moreover, at this time, if the output shaft 2 is driven by an external force to rotate clockwise, the pressure plate 2 32 will move axially to the left toward the inner disc component 2 34 to press the inner disc component 2 34, friction ring 2 33 and force transfer disc 2 35. The inner disc component 2 34, friction ring 2 33 and force transfer disc 2 35 will be axially pressed together. Since the inner disc component 2 34 cannot rotate clockwise relative to the outer member 2, the output shaft 2 cannot rotate clockwise either.

[0105] The motor shaft rotates counterclockwise, driving the input shaft 1 and the input disc 2 31 to rotate counterclockwise, the pressure plate 12 moves axially to the left and leaves the inner disc component 14, and the pressure plate 2 32 moves axially to the left toward the inner disc component 2 34 to press the friction ring 2 33 and the inner disc component 2 34 onto the force transmission disc 2 35. The pressure plate 2 32, the friction ring 2 33 and the inner disc component 2 34 cannot move axially and can only rotate. The torque is transmitted from the input shaft 1 to the output shaft 2 through the pressure plate 2 32, the friction ring 2 33 between the inner disc component 2 34 and the pressure plate 2 32, the inner disc component 2 34, the friction ring 2 33 between the inner disc component 2 34 and the force transmission disc 2 35, and the force transmission disc 2 35. The output shaft 2 rotates counterclockwise under the drive of the input shaft 1. When the output shaft 2 rotates counterclockwise for a certain angle, the input shaft 1 stops rotating. At this time, if the output shaft 2 is driven by an external force to rotate clockwise together with the force transfer disc 2 35 and the inner disc component 2 34, since the inner disc component 2 34 cannot rotate clockwise relative to the outer member 2, the output shaft 2, friction ring 2 33, force transfer disc 2 35 and inner disc component 2 34 axially pressed together cannot rotate clockwise. Moreover, at this time, if the output shaft 2 is driven by an external force to rotate counterclockwise, the pressure plate 12 will move axially to the right toward the inner disc component 14 to press the inner disc component 14 and the friction ring 13 onto the force transfer disc 15. The inner disc component 14, the friction ring 13 and the force transfer disc 15 will be axially pressed together. Since the inner disc component 14 cannot rotate counterclockwise relative to the outer member 24, the output shaft 2 cannot rotate counterclockwise either.

[0106] As mentioned above, when the motor shaft rotates counterclockwise, the output shaft rotates counterclockwise, and through the transmission of gear 1 51, gear 2 52, gear 3 53, and gear 4 54, the lead screw 56 is driven to rotate, and through the cooperation with the nut 57, the piston rod 300 is driven to move left; when the motor shaft rotates clockwise, the piston rod 300 is driven to move right. The left and right movement of the piston rod pushes or pulls up the movable arm, so that the movable arm reaches a certain position. When the piston rod and the movable arm reach a certain position, the motor is powered off, and there is no need for the motor to provide torque. The piston rod and the movable arm will not move under the action of external force and remain in this state. Example 4

[0107] The bidirectional non-return transmission mechanism 400 in Example 4 is shown in FIG. Fig.16 The structure and principle of the bidirectional non-return transmission mechanism are basically the same as those of the embodiment 3, and both include an input shaft 1, an output shaft 2, a housing 10, a one-way transmission mechanism 1 401, and a one-way transmission mechanism 2 402. The main difference is that the input shaft 1 in the embodiment 2 is a gear shaft of an input gear 600 (the input shaft in the embodiment 1 is the motor shaft 101 of the motor 100), so that the output shaft 2 can be driven to rotate by the input shaft 1 through the clockwise or counterclockwise rotation of the input gear 600.

Claims

1. A two-way check transmission mechanism, comprising a housing, an input shaft, an output shaft, a one-way clutch 1, and a one-way clutch 2; wherein: A pressure plate 1 and a pressure plate 2 are arranged on the output shaft and are matched with the output shaft in a spiral line. The pressure plate 1 and the pressure plate 2 are connected to the input shaft which drives the pressure plate 1 and the pressure plate 2 to rotate but does not restrict the axial movement of the pressure plate 1 and the pressure plate 2; a force transmission plate 1 and a force transmission plate 2 are fixed on the output shaft; the one-way clutch 1 includes an outer member 1 fixed on the housing and an inner member 1 which can rotate in one direction relative to the outer member 1; the one-way clutch 2 includes an outer member 2 fixed on the housing and an inner member 2 which can rotate in one direction relative to the outer member 2; the inner member 1 and the inner member 2 can rotate in opposite directions; When the input shaft rotates in a certain direction, the pressure plate 1 moves axially to press the force transmission plate 1 and the inner plate component 1, so that the pressure plate 1, the force transmission plate 1 and the inner plate component 1 form a friction transmission structure that can transmit torque. At the same time, the pressure plate 2 moves axially to break away from the contact with the force transmission plate 1 and the inner plate component 1. The torque is transmitted from the input shaft to the output shaft through the pressure plate 1, the inner plate component 1 and the force transmission plate 1. The output shaft rotates forwardly under the drive of the input shaft. When the output shaft rotates forwardly for a certain angle, the input shaft stops rotating. At this time, the output shaft is driven by external force and When the force transmission disc 1 and the inner disc component 1 are pre-rotated in the reverse direction opposite to the forward direction, since the inner disc component 1 cannot rotate in the reverse direction relative to the outer disc component 1, the output shaft cannot rotate in the reverse direction. At this time, if the output shaft is pre-rotated in the forward direction under the drive of the external force, the pressure plate 2 will axially move and press the force transmission disc 2 and the inner disc component 2, so that the pressure plate 2, the force transmission disc 2 and the inner disc component 2 form a friction transmission structure capable of transmitting torque. Since the inner disc component 2 cannot rotate in the forward direction relative to the outer disc component 2, the output shaft cannot rotate in the forward direction either. The inner disc component one and the inner disc component two can move axially relative to the outer disc component one and the outer disc component two; when the input shaft rotates in a certain direction, the pressure plate one moves axially toward the inner disc component one to press the inner disc component one against the force transfer plate one, and at the same time, the pressure plate two moves axially away from the inner disc component two, and the torque is transmitted from the input shaft to the output shaft through the pressure plate one, the inner disc component one and the force transfer plate one, and the output shaft rotates forwardly driven by the input shaft; after the output shaft rotates forwardly for a certain angle, the input shaft stops rotating. At this time, if the output shaft rotates forwardly in advance driven by an external force, the pressure plate two will move axially toward the inner disc component two to press the inner disc component two against the force transfer plate two. Since the inner disc component two cannot rotate forwardly relative to the outer disc component two, the output shaft cannot rotate forwardly either.

2. The bidirectional non-return transmission mechanism according to claim 1, characterized in that: A friction ring is arranged between the axially opposite end faces of the inner disc component 1 and the pressure plate 1, or between the axially opposite end faces of the inner disc component 1 and the force transmission plate 1. The friction ring is positioned on the inner disc component 1, the pressure plate 1 or the force transmission plate 1 in the radial direction. When the input shaft rotates in a certain direction, the pressure plate 1 moves axially toward the inner disc component 1 to axially compress the inner disc component 1, the friction ring 1 and the force transmission plate 1, and the torque is transmitted from the input shaft to the output shaft via the pressure plate 1, the friction ring 1, the inner disc component 1 and the force transmission plate 1.

3. The bidirectional non-return transmission mechanism according to claim 1, characterized in that: An inner disc member of the one-way clutch is rotatably supported on the output shaft.

4. The bidirectional non-return transmission mechanism according to claim 1, characterized in that: the input shaft An input disc 1 is fixed on the top, and the input disc 1 is spline-connected with a pressure disc 1.

5. The bidirectional non-return transmission mechanism according to claim 1, characterized in that: When the input shaft rotates in the opposite direction, the pressure plate 2 moves axially toward the inner plate component 2 to press the inner plate component 2 against the force transfer plate 2, and the pressure plate 1 moves axially away from the inner plate component 1, and the torque is transmitted from the input shaft to the output shaft through the pressure plate 2, the inner plate component 2 and the force transfer plate 2, and the output shaft rotates in the opposite direction driven by the input shaft; when the output shaft rotates in the opposite direction for a certain angle, the input shaft stops rotating. At this time, if the output shaft is pre-rotated forwardly together with the force transfer plate 2 and the inner plate component 2 under the drive of an external force, since the inner plate component 2 cannot rotate forwardly relative to the outer member 2, the output shaft cannot rotate forwardly. Moreover, at this time, if the output shaft is pre-rotated in the opposite direction under the drive of an external force, the pressure plate 1 will move axially toward the inner plate component 1 to press the inner plate component 1 against the force transfer plate 1. Since the inner plate component 1 cannot rotate in the opposite direction relative to the outer member 1, the output shaft cannot rotate in the opposite direction either.

6. The bidirectional non-return transmission mechanism according to claim 5, characterized in that: A friction ring 2 is arranged between the axially opposite end faces of the inner disc component 2 and the pressure plate 2, or between the axially opposite end faces of the inner disc component 2 and the force transfer plate 2. The friction ring 2 is positioned on the inner disc component 2, the pressure plate 2 or the force transfer plate 2 in the radial direction. When the input shaft rotates in the opposite direction, the pressure plate 2 moves axially toward the inner disc component 2 to axially compress the inner disc component 2, the friction ring 2 and the force transfer plate 2, and the torque is transmitted from the input shaft to the output shaft via the pressure plate 2, the friction ring 2, the inner disc component 2 and the force transfer plate 2.

7. The bidirectional non-return transmission mechanism according to claim 1, characterized in that: The friction plate 1 and the friction plate 2 move axially and are connected to the inner plate component 1 and the inner plate component 2 in the circumferential direction. When the input shaft rotates in a certain direction, the pressure plate 1 moves axially toward the friction plate 1 to press the friction plate 1 against the force transmission plate 1. At the same time, the pressure plate 2 moves axially away from the friction plate 2. The torque is transmitted from the input shaft through the pressure plate 1, the friction plate 1 and the force transmission plate 1 to the output shaft. The output shaft, the friction plate 1 and the inner plate component 1 rotate forwardly under the drive of the input shaft. When the output shaft rotates forwardly for a certain angle, the input shaft stops rotating. When the output shaft is driven by an external force to rotate in the reverse direction opposite to the positive direction together with the force transfer plate 1, the friction plate 1 and the inner plate component 1, since the inner plate component 1 cannot rotate in the reverse direction relative to the outer component 1, the output shaft cannot rotate in the reverse direction. Moreover, at this time, when the output shaft is driven by an external force to rotate in the positive direction, the pressure plate 2 will move axially toward the friction plate 2 to press the friction plate 2 against the force transfer plate 2. Since the inner plate component 2 cannot rotate in the positive direction relative to the outer component 2, the output shaft cannot rotate in the positive direction either.

8. The bidirectional non-return transmission mechanism according to claim 7, characterized in that: The outer periphery of the friction plate 1 is connected to the friction plate sleeve 1 through a spline, and the friction plate sleeve 1 is fixedly connected to the inner disc component 1.

9. The bidirectional non-return transmission mechanism according to claim 7, characterized in that: A thrust plate 1 is fixed on the outer circumference of a force transfer plate 1; when the input shaft rotates in a certain direction, the pressure plate 1 moves axially toward the friction plate 1 to press the friction plate 1 against the thrust plate 1, and the torque is transmitted from the input shaft to the output shaft through the pressure plate 1, the friction plate 1, the thrust plate 1 and the force transfer plate 1, and the output shaft and the inner plate component 1 rotate forward in a certain direction driven by the input shaft; when the output shaft rotates forward by a certain angle, the input shaft stops rotating. At this time, if the output shaft is driven by an external force to rotate in the opposite direction together with the force transfer plate 1, the thrust plate 1, the friction plate 1 and the inner plate component 1, the output shaft cannot rotate in the reverse direction because the inner plate component 1 cannot rotate in the reverse direction relative to the outer member 1. Therefore, the output shaft cannot rotate in the reverse direction.

10. The bidirectional non-return transmission mechanism according to claim 9, characterized in that: The outer circumference of the friction plate is connected to the friction plate sleeve by a spline, and the friction plate sleeve is fixedly connected to the inner plate component; the outer circumference of the force transmission plate is connected to the friction plate by a spline; when the input shaft rotates in a certain direction, the pressure plate moves axially toward the friction plate to press the friction plate and the friction plate against the thrust plate, and the torque is transmitted from the input shaft to the output shaft through the pressure plate, the friction plate, the friction plate, the thrust plate and the force transmission plate, and the output shaft and the inner plate component rotate positively in a certain direction driven by the input shaft; when the output shaft rotates positively for a certain angle, the input shaft stops rotating. At this time, if the output shaft is driven by an external force and rotates in the reverse direction opposite to the positive direction together with the force transmission plate, the thrust plate, the friction plate, the friction plate and the inner plate component, the output shaft cannot rotate in the reverse direction because the inner plate component cannot rotate in the reverse direction relative to the outer member.

11. The bidirectional non-return transmission mechanism according to claim 10, characterized in that: There are multiple friction discs and multiple friction plates, which are staggered in the axial direction.

12. The bidirectional non-return transmission mechanism according to claim 10, characterized in that: The fixedly connected friction plate sleeve and the inner disc component are rotatably supported on the output shaft or the housing.

13. The bidirectional non-return transmission mechanism according to claim 7, characterized in that: the input shaft An input disc 1 is fixed on the upper side, and a pressure plate 1 is connected to the input disc 1 through a guide pin 1 so as to be axially movable relative to the input disc 1; an elastic element 1 is arranged between the pressure plate 1 and the input disc 1 for pushing the pressure plate 1 to move axially along the guide pin 1 toward the friction plate 1.

14. The bidirectional non-return transmission mechanism according to claim 1, characterized in that: One-way clutch is a ratchet pawl clutch or a roller one-way clutch.

15. The bidirectional non-return transmission mechanism according to claim 7, characterized in that: When the input shaft rotates in the opposite direction, the pressure plate 2 moves axially toward the friction plate 2 to press the friction plate 2 against the force transfer plate 2, and at the same time, the pressure plate 1 moves axially away from the friction plate 1, and the torque is transmitted from the input shaft to the output shaft through the pressure plate 2, the friction plate 2 and the force transfer plate 2, and the output shaft and the inner plate component 2 rotate in the opposite direction driven by the input shaft; when the output shaft rotates in the opposite direction for a certain angle, the input shaft stops rotating. At this time, if the output shaft rotates forward together with the force transfer plate 2, the friction plate 2 and the inner plate component 2 under the drive of external force, since the inner plate component 2 cannot rotate forward relative to the outer component 2, the output shaft cannot rotate forward. At this time, if the output shaft rotates in the reverse direction under the drive of external force, the pressure plate 1 will move axially toward the friction plate 1 to press the friction plate 1 against the force transfer plate 1, and since the inner plate component 1 cannot rotate in the reverse direction relative to the outer component 1, the output shaft cannot rotate in the reverse direction either.

16. The bidirectional non-return transmission mechanism according to claim 15, characterized in that: Thrust plate 2 is fixed on the outer circumference of force transfer plate 2; when the input shaft rotates in the opposite direction, pressure plate 2 moves axially toward friction plate 2 to press friction plate 2 against thrust plate 2, and torque is transmitted from the input shaft to the output shaft through pressure plate 2, friction plate 2, thrust plate 2 and force transfer plate 2, and the output shaft and inner plate component 2 rotate in the opposite direction driven by the input shaft; when the output shaft rotates in the opposite direction for a certain angle, the input shaft stops rotating. At this time, if the output shaft is driven by external force to rotate forward together with force transfer plate 2, thrust plate 2, friction plate 2 and inner plate component 2, the output shaft cannot rotate forward because inner plate component 2 cannot rotate forward relative to outer component 2.

17. The bidirectional non-return transmission mechanism according to claim 16, characterized in that: The outer periphery of the friction plate 2 is connected to the friction plate sleeve 2 by a spline, and the friction plate sleeve 2 is fixedly connected to the inner plate component 2; the outer periphery of the force transfer plate 2 is connected to the friction plate 2 by a spline; when the input shaft rotates in the opposite direction, the pressure plate 2 moves axially toward the friction plate 2 to press the friction plate 2 and the friction plate 2 against the thrust plate 2, and the torque is transmitted from the input shaft to the output shaft through the pressure plate 2, the friction plate 2, the friction plate 2, the thrust plate 2 and the force transfer plate 2, and the output shaft and the inner plate component 2 rotate in the opposite direction driven by the input shaft; when the output shaft rotates in the opposite direction for a certain angle, the input shaft stops rotating. At this time, if the output shaft is driven by an external force to rotate forward together with the force transfer plate 2, the thrust plate 2, the friction plate 2, the friction plate 2 and the inner plate component 2, the output shaft cannot rotate forward because the inner plate component 2 cannot rotate forward relative to the outer peripheral component 2.

18. An electric cylinder, comprising a motor and a reciprocating piston rod, characterized in that: It also includes a two-way check transmission mechanism as described in any one of claims 1-17, the motor shaft is connected to the input shaft in the two-way check transmission mechanism, and the output shaft in the two-way check transmission mechanism is connected to the piston rod through a transmission device to drive the piston rod to move back and forth.

19. The method for using the electric cylinder according to claim 18, characterized in that: The motor shaft rotates in a certain direction, driving the piston rod to move to a certain position; then the motor loses power and the piston rod remains in that position.

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