Coaxial input and output bidirectional backstop transmission mechanism

Abstract

According to the coaxial input and output bidirectional backstop transmission mechanism, the input shaft and the output shaft are coaxial, and the transmission mechanism is small in overall size, low in cost and convenient to use. The device comprises an input shaft, an output shaft, a one-way shaft sleeve II and a one-way shaft sleeve I which are coaxial, a planet carrier is arranged on the second one-way shaft sleeve, and the first output disc is fixed to the output shaft. The middle pressure plate is fixed on the slip ring; the inner circumference of the slip ring is matched with the output shaft through a spiral line; the planet gear is rotationally arranged on the planet carrier, and the planet gear is meshed with the periphery of the sliding ring and a driving gear fixed to the periphery of the input shaft at the same time; when the input shaft rotates, the sliding ring and the middle pressing disc move in the axial direction while rotating relative to the output shaft, the middle pressing disc presses the second one-way shaft sleeve or the planet carrier, so that the middle pressing disc, the second one-way shaft sleeve and the planet carrier form a whole for transmitting torque, or the middle pressing disc presses the first one-way shaft sleeve and the first output disc at the same time; and the middle pressure plate, the one-way shaft sleeve I and the output plate I form a whole for transmitting torque.

Description

Technical Field

[0001] This patent relates to a bidirectional non-return transmission mechanism. Background Art

[0002] CN115285091A (application number 2022109116489) discloses a bidirectional non-return transmission mechanism 400, see Figure 1 , including an input gear 600, 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 transfer 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.), a one-way transmission mechanism 2 402 (including an input disc 2 31, a pressure plate 2 32, a friction plate 2 39, an inner disc component 2 34, a force transfer disc 2 35, a thrust plate 2 36, a bearing 2 37, a friction disc 2 38, a guide pin 2 41, an elastic element 2 42, a friction plate sleeve 2 43, a peripheral component 2 44, etc.).

[0003] When the input gear 600 rotates counterclockwise, the pressure plate 2 32 moves axially to the right and leaves the friction plate 2 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 gear 600, 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 member 14 rotate counterclockwise under the drive of the input gear 600. When the output shaft rotates counterclockwise for a certain angle, the input gear 600 stops rotating. At this time, the output shaft is driven by an external force and is connected with the force transfer plate 15, the thrust plate 16, and the friction plate 16. When the inner disc component 18, the friction plate 19 and the inner disc component 14 are pre-rotated clockwise together, since the inner disc component 14 cannot rotate clockwise relative to the outer disc 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 disc component 2 34 in the circumferential direction, and the inner disc component 2 34 cannot rotate counterclockwise relative to the outer disc component 2 44, the output shaft cannot rotate counterclockwise either.

[0004] When the input gear 600 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 gear 600, 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 member 2 34 rotate clockwise under the drive of the input gear 600. When the output shaft rotates clockwise for a certain angle, the input gear 600 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 When the friction plate 38, friction plate 39 and inner plate component 34 are pre-rotated counterclockwise together, since the inner plate component 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, friction plate 18 and 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 plate component 14 in the circumferential direction, and the inner plate component 14 cannot rotate clockwise relative to the outer member 24, the output shaft cannot rotate clockwise either.

[0005] The bidirectional non-return transmission mechanism can drive the output shaft to rotate smoothly in the forward direction when the input gear 600 rotates in a certain direction, and can drive the output shaft to rotate smoothly in the reverse direction when the input gear 600 rotates in the reverse direction. When the input gear 600 does not rotate, the output shaft can neither rotate forward nor reverse under the action of external force.

[0006] However, since the input disc 1 11 and the input disc 2 31 need to be fixed on both sides of the input gear 600 to facilitate the connection of the pressure plate 1 12 and the pressure plate 2 32, the input shaft of the power component that drives the input gear 600 to rotate can only mesh with the input gear 600, that is, the input shaft of the power component can only be located on one side of the output shaft 2, and the input shaft of the power component cannot be coaxial with the output shaft 2. Although this power input has a simple structure, it can often only be used in transmission links with lower speeds and larger torques. Correspondingly, the bidirectional check transmission mechanism has a large volume due to its large torque, which is not conducive to reducing costs and usage. Summary of the invention

[0007] The purpose of this patent is to provide a bidirectional check valve transmission mechanism with coaxial input and output. When the input shaft of the power component rotates in a certain direction, it can drive the output shaft to rotate smoothly in the forward direction. When the input shaft rotates in the opposite direction, it can drive the output shaft to rotate smoothly in the reverse direction. When the input shaft does not rotate, the output shaft can neither rotate forward nor reverse under the action of external force. Moreover, the input shaft and the output shaft are coaxial, with a small overall size, low cost and easy use.

[0008] To achieve the above purpose, this patent adopts the following technical solutions:

[0009] A two-way backstop transmission mechanism with coaxial input and output comprises an input shaft and an output shaft rotatably arranged on a casing, a second one-way sleeve and a first one-way sleeve are both rotatably arranged on the casing around an axis through a one-way bearing, the second one-way sleeve and the first one-way sleeve are in opposite directions to the rotation of the casing, and a planet carrier is arranged on the second one-way sleeve; the axes of the input shaft, the output shaft, the second one-way sleeve and the first one-way sleeve are coaxial, and the input shaft and the output shaft pass through the center of the second one-way sleeve and the first one-way sleeve respectively; an output disc is fixed on the output shaft, and the planet carrier, the second one-way sleeve, the output disc and the first one-way sleeve are arranged axially opposite to each other;

[0010] The intermediate pressure plate is axially located between the one-way sleeve 1 and the one-way sleeve 2 and between the output plate 1 and the planet carrier. The intermediate pressure plate is fixed on the slip ring, and the inner circumference of the slip ring is matched with the output shaft in a spiral line.

[0011] The planetary gear is rotatably arranged on the planetary carrier around its own axis, and the planetary gear is meshed with the outer periphery of the slip ring and the driving gear fixed on the outer periphery of the input shaft at the same time;

[0012] When the direction of rotation of the input shaft is the same as the direction in which the one-way sleeve 2 can rotate relative to the casing, the slip ring and the intermediate pressure plate engaged with the planetary gear rotate relative to the output shaft and move toward the one-way sleeve 2 and the planetary carrier along the output shaft axis until the intermediate pressure plate axially presses the one-way sleeve 2 or the planetary carrier, so that the intermediate pressure plate, the one-way sleeve 2 and the planetary carrier form a whole for transmitting torque. When the direction of rotation of the input shaft is opposite to the direction in which the one-way sleeve 2 can rotate relative to the casing, the slip ring and the intermediate pressure plate rotate relative to the output shaft and move toward the one-way sleeve 1 and the output disc 1 along the output shaft axis until the intermediate pressure plate axially presses the one-way sleeve 1 and the output disc 1 at the same time, so that the intermediate pressure plate, the one-way sleeve 1 and the output disc 1 form a whole for transmitting torque.

[0013] When it is working, when the input shaft of the power component rotates in a certain direction, the planetary gear drives the slip ring and the intermediate pressure plate to rotate relative to the output shaft and move axially toward the output disc 1 and the one-way sleeve 1 until the intermediate pressure plate presses the output disc 1 and the one-way sleeve 1 at the same time and cannot move. The output disc 1 and the one-way sleeve 1 form an integrated structure that can transmit torque through the intermediate pressure plate. At the same time, the intermediate pressure plate moves axially to break away from the contact with the one-way sleeve 2 and the planetary carrier. The one-way sleeve 2 and the planetary carrier can rotate relatively. At this time, the input shaft rotates, and the input shaft drives the slip ring and the intermediate pressure plate to rotate through the driving gear and the planetary gear. Since the slip ring and the intermediate pressure plate cannot move relative to the output shaft, the slip ring rotates forward together with the output shaft; when the output shaft rotates forward by a certain angle, the input shaft stops rotating, such as If the output shaft is driven by an external force to rotate in the reverse direction opposite to the forward direction together with the output disc 1 and the one-way sleeve 1, the output shaft cannot rotate in the reverse direction because the one-way sleeve 1 cannot rotate in the reverse direction relative to the casing; if the output shaft is driven by an external force to rotate in the forward direction, the intermediate pressure plate will rotate relative to the output shaft and axially move away from the output disc 1 and the one-way sleeve 1, the one-way sleeve 1 and the output disc 1 will both be out of contact with the intermediate pressure plate, and at the same time the intermediate pressure plate will move toward the planetary carrier and the one-way sleeve 2 until the intermediate pressure plate presses the planetary carrier and the one-way sleeve 2 at the same time, and the intermediate pressure plate cannot move, and an integrated structure capable of transmitting torque is formed between the planetary carrier and the one-way sleeve 2 through the intermediate pressure plate, and since the one-way sleeve 2 cannot rotate in the forward direction relative to the casing, the output shaft cannot rotate in the forward direction either.

[0014] The above-mentioned coaxial input and output two-way check valve transmission mechanism also includes friction plate 1 and friction plate 2, which are respectively connected to one-way sleeve 1 and one-way sleeve 2 in the axial direction and transmit force in the circumferential direction; when the input shaft rotates, the planetary gear is driven to rotate through the driving gear, and the slip ring and the intermediate pressure plate meshing with the planetary gear rotate relative to the output shaft and move along the axis of the output shaft until the intermediate pressure plate axially presses the friction plate 2 against the planetary carrier, so that the intermediate pressure plate, friction plate 2, planetary carrier, and one-way sleeve 2 form a whole for transmitting torque, or until the intermediate pressure plate axially presses the friction plate 1 against the output disc 1, so that the intermediate pressure plate, friction plate 1, one-way sleeve 1 and output disc 1 form a whole for transmitting torque.

[0015] When it is working, when the direction of rotation of the input shaft is opposite to the direction in which the one-way sleeve 2 can rotate relative to the casing, the planetary gear drives the slip ring and the intermediate pressure plate to rotate relative to the output shaft and move axially toward the friction plate 1 until the intermediate pressure plate presses the friction plate 1 against the output plate 1. The intermediate pressure plate, friction plate 1, one-way sleeve 1 and output plate 1 form an integrated structure for transmitting torque. The slip ring and the intermediate pressure plate cannot rotate relative to the output shaft. At the same time, the intermediate pressure plate is axially away from the friction plate 2, and the friction plate 2 and the one-way sleeve 2 can rotate relative to the planetary carrier. The input shaft drives the slip ring, the output shaft, the intermediate pressure plate, the friction plate 1, the output plate 1 and the one-way sleeve 1 to rotate forwardly through the driving gear, the planetary gear and the planetary carrier. When the output shaft rotates forwardly for a certain angle, the input shaft stops rotating. When the output shaft is driven by external force to rotate in the reverse direction opposite to the forward direction together with the output disc 1, the friction plate 1 and the one-way sleeve 1, since the one-way sleeve 1 cannot rotate in the reverse direction relative to the casing, the output shaft cannot rotate in the reverse direction; when the output shaft is driven by external force to rotate in the forward direction, the slip ring and the intermediate pressure plate will rotate relative to the output shaft and move axially away from the friction plate 1, and the slip ring and the intermediate pressure plate will move toward the friction plate 2 until the friction plate 2 is pressed tightly against the planetary carrier, and then the slip ring and the intermediate pressure plate stop moving. At this time, the slip ring, the intermediate pressure plate, the friction plate 2, the planetary carrier and the one-way sleeve 2 form an integrated structure that can transmit torque. The slip ring, the intermediate pressure plate, etc. can only rotate together with the output shaft, but since the one-way sleeve 2 cannot rotate in the forward direction relative to the casing, the output shaft cannot rotate in the forward direction either.

[0016] In the above-mentioned coaxial input and output bidirectional backstop 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 unidirectional shaft sleeve 1.

[0017] In the above-mentioned coaxial input and output two-way backstop 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 one-way shaft sleeve 1; the outer periphery of the output plate 1 is connected to the friction plate 1 by a spline; the outer periphery of the output plate 1 is fixed with a thrust plate 1; when the direction of rotation of the input shaft is opposite to the direction in which the one-way shaft sleeve 2 can rotate relative to the casing, the intermediate pressure plate 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 driving gear, the planetary gear, and the slip ring, and the output shaft rotates 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 output plate 1, the thrust plate 1, the friction plate 1, the friction plate 1, and the one-way shaft sleeve 1, the output shaft cannot rotate in the reverse direction because the one-way shaft sleeve 1 cannot rotate in the reverse direction relative to the casing.

[0018] 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.

[0019] 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 one-way shaft sleeve; the outer periphery of the planetary carrier is connected to the second friction plate by a spline; the second thrust plate is fixed on the outer periphery of the planetary carrier; when the direction of rotation of the input shaft is the same as the direction in which the second one-way shaft sleeve can rotate relative to the casing, the planetary gear drives the slip ring and the intermediate pressure plate to rotate relative to the output shaft and move axially toward the second friction plate to press the second friction plate and the second friction plate onto the second thrust plate. At this time, the slip ring, the intermediate pressure plate, the second friction plate and the second friction plate are , thrust plate 2, planetary carrier, one-way sleeve 2, and output shaft form an integrated structure capable of transmitting torque. The torque is transmitted from the input shaft to the output shaft via the driving gear and the planetary gear. The output shaft and one-way sleeve 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 the planetary carrier, thrust plate 2, friction plate 2, friction plate 2, and one-way sleeve 2, the output shaft cannot rotate forward because the one-way sleeve 2 cannot rotate forward relative to the casing.

[0020] 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.

[0021] 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.

[0022] 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.

[0023] 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.

[0024] 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.

[0025] The one-way sleeve 1 can rotate relative to the housing when the direction of rotation is the same as the positive rotation direction of the output shaft, that is, the one-way sleeve 1 can rotate positively relative to the housing, and the one-way sleeve 1 cannot rotate reversely relative to the housing; for example, if the positive rotation direction of the output shaft is clockwise, the one-way sleeve 1 can rotate clockwise relative to the housing, and the one-way sleeve 1 cannot rotate counterclockwise relative to the housing. The one-way sleeve 2 can rotate relative to the housing when the reverse rotation direction is the same as the output shaft, that is, the one-way sleeve 2 can rotate reversely relative to the housing, and the one-way sleeve 2 cannot rotate positively relative to the housing. For example, if the positive rotation direction of the output shaft is clockwise, the reverse rotation direction is counterclockwise, then the one-way sleeve 2 can rotate counterclockwise relative to the housing, and the one-way sleeve 2 cannot rotate clockwise relative to the housing.

[0026] When using the bidirectional check transmission mechanism, if the output shaft needs to rotate in the forward direction, the input shaft rotates in the forward direction, the slip ring and the intermediate pressure plate move axially to disengage from the planetary carrier and the one-way sleeve 2, and at the same time, the intermediate pressure plate moves axially to press the output plate 1 and the one-way sleeve 1, so that the intermediate pressure plate, the output plate 1 and the one-way sleeve 1 form a friction transmission structure that can transmit torque. Since the slip ring and the intermediate pressure plate cannot move relative to the output shaft, the input shaft drives the slip ring, the intermediate pressure plate, etc. to rotate forward together with the output shaft through the driving gear and the planetary gear, and the output shaft rotates forward under the drive of 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 an external force to rotate in the reverse direction together with the output disc 1 and the one-way sleeve 1, since the intermediate pressure plate, the output disc 1 and the one-way sleeve 1 form a friction transmission structure for transmitting torque, and the one-way sleeve 1 cannot rotate in the reverse direction relative to the casing, 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 forward direction, the intermediate pressure plate will move axially to press the planetary carrier or the one-way sleeve 2, so that the intermediate pressure plate, the planetary carrier and the one-way sleeve 2 form a friction transmission structure that can transmit torque, and since the one-way sleeve 2 cannot rotate in the forward direction relative to the casing, the output shaft cannot rotate in the forward direction either.

[0027] When the input shaft rotates in the opposite direction, the intermediate pressure plate moves axially and disengages from the output plate 1 and the one-way sleeve 1. At the same time, the intermediate pressure plate moves axially to press the planetary carrier or the one-way sleeve 2, so that the slip ring, the intermediate pressure plate, the planetary carrier and the one-way sleeve 2 form an integrated structure that can transmit torque. The planetary carrier cannot rotate relative to the output shaft. The torque is transmitted from the input shaft to the output shaft through the driving gear and the planetary gear. 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 driven by an external force, When the output shaft is pre-rotated forwardly together with the planetary carrier and the one-way sleeve 2, the output shaft cannot rotate forwardly because the one-way sleeve 2 cannot rotate forwardly relative to the casing; when the output shaft is pre-rotated reversely under the drive of external force, the slip ring and the intermediate pressure plate will move axially to loosen the planetary carrier and the one-way sleeve 2, and the intermediate pressure plate will press the output disc 1 and the one-way sleeve 1 at the same time, so that the intermediate pressure plate, the output disc 1 and the one-way sleeve 1 form an integrated structure that can transmit torque. Since the one-way sleeve 1 cannot rotate reversely relative to the casing, the output shaft cannot rotate reversely either.

[0028] In the process of the input shaft rotating forward to transmit torque to the output shaft, the intermediate pressure plate moves axially, and the intermediate pressure plate, the output plate 1, and the one-way sleeve 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 intermediate pressure plate moves axially, and the intermediate pressure plate and the planetary carrier or the one-way sleeve 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.

[0029] If the output shaft needs to rotate in the positive direction, the input shaft rotates in the positive direction, and the slip ring and the intermediate pressure plate move axially away from the one-way sleeve 2 and move axially toward the one-way sleeve 1 and the output disc 1. After the intermediate pressure plate presses the one-way sleeve 1 and the output disc 1 at the same time, the slip ring, the intermediate pressure plate, the one-way sleeve 1 and the output disc 1 cannot move axially and can only rotate with the output shaft. The torque is transmitted from the input shaft to the output shaft through the driving gear and the planetary gear. The output shaft, the one-way sleeve 1, the output disc 1, the intermediate pressure plate, the slip ring, etc. 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 Stop rotating. At this time, if the output shaft is driven by external force to rotate in the reverse direction together with the output disc 1 and the one-way sleeve 1, since the one-way sleeve 1 cannot rotate in the reverse direction relative to the casing, the output shaft, the intermediate pressure plate, the slip ring, the one-way sleeve 1, etc. cannot rotate in the reverse direction; if the output shaft is driven by external force to rotate in the forward direction, the slip ring and the intermediate pressure plate will move axially toward the one-way sleeve 2 and the planetary carrier, the intermediate pressure plate loosens the one-way sleeve 1 and the output disc 1, and presses the one-way sleeve 2 or the planetary carrier. Since the one-way sleeve 2 cannot rotate in the forward direction relative to the casing, the output shaft cannot rotate in the forward direction either.

[0030] When the input shaft rotates in the opposite direction, the slip ring and the intermediate pressure plate move axially away from the one-way sleeve 1 and the output disc 1, and after the intermediate pressure plate moves axially toward the one-way sleeve 2 and the planetary carrier and presses the one-way sleeve 2 or the planetary carrier, the slip ring, the intermediate pressure plate, the one-way sleeve 2 and the planetary carrier cannot move axially and can only rotate together with the output shaft, and the torque is transmitted from the input shaft to the output shaft through the driving gear and the planetary gear, 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 slip ring, the intermediate pressure plate, the planetary carrier and the one-way sleeve 2 under the drive of external force, the output shaft cannot rotate forwardly because the one-way sleeve 2 cannot rotate forwardly relative to the casing; if the output shaft is pre-rotated in the opposite direction under the drive of external force, the intermediate pressure plate will move axially toward the one-way sleeve 1 and press the one-way sleeve 1 and the output disc 1 at the same time, and since the one-way sleeve 1 cannot rotate in the opposite direction relative to the casing, the output shaft cannot rotate in the opposite direction either.

[0031] The one-way sleeve 1 and the one-way sleeve 2 can only rotate in one direction relative to the housing, which belongs to the prior art. For example, the one-way sleeve 1 and the one-way sleeve 2 are rotatably arranged on the housing through a one-way clutch, and there are many one-way clutches, such as a ratchet pawl clutch, a roller one-way clutch, etc.

[0032] The coaxial input and output bidirectional backstop transmission mechanism has a coaxial input shaft and an output shaft, a small overall volume, low cost and convenient use. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] Figure 1 It is a schematic diagram of a bidirectional non-return transmission mechanism of the prior art;

[0034] Figure 2 It is a schematic diagram of a two-way backstop transmission mechanism with coaxial input and output;

[0035] Figure 3 It is a schematic diagram of the relative relationship between the input shaft, driving gear, planetary gear, etc.

[0036] Figure 4 It is a schematic diagram of the relative relationship between the input shaft, driving gear, planetary gear, slip ring, etc.

[0037] In the figure, a two-way check transmission mechanism 400, a one-way transmission mechanism 1 401, a one-way transmission mechanism 2 402, an input gear 600,

[0038] Input shaft 1, output shaft 2, housing 10,

[0039] Input disc 11, pressure plate 12, 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,

[0040] Input disc 2 31, pressure plate 2 32, 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 1 45,

[0041] Slip ring 70, intermediate pressure plate 72, planet carrier 75, planet gear 76, driving gear 77, planet gear shaft 78, one-way bearing 80, one-way shaft sleeve 1 26, one-way shaft sleeve 2 46, output disc 1 28. DETAILED DESCRIPTION

[0042] 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.

[0043] See also Figure 2 The bidirectional backstop transmission mechanism with coaxial input and output is shown.

[0044] The one-way sleeve 1 26 and the one-way sleeve 2 46 are rotatably supported on the housing (not shown) through the one-way bearing 80 respectively. The one-way sleeve 1 26 cannot rotate clockwise relative to the housing, but can only rotate counterclockwise relative to the housing. The one-way sleeve 2 46 cannot rotate counterclockwise relative to the housing, but can only rotate clockwise relative to the housing. The left end of the output shaft 2 is supported inside the right end of the input shaft 1 through a bearing, the output shaft 2 is rotatably supported on the one-way sleeve 1 26 through a bearing, and the input shaft 1 is rotatably supported on the one-way sleeve 2 46 through a bearing. Of course, the input shaft 1 and the output shaft 2 can also be directly rotatably supported on the housing through bearings.

[0045] 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 one-way shaft sleeve 26; the outer periphery of the output disc 28 is connected to the friction disc 18 through a spline. The thrust plate 16 is fixed on the outer periphery of the output disc 28.

[0046] 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 one-way shaft sleeve 46; the outer periphery of the planet carrier 75 is connected to the friction disc 38 through a spline. The outer periphery of the planet carrier 75 is fixed with the thrust plate 36.

[0047] A planet carrier 75 is fixed on the one-way shaft sleeve 46; the intermediate pressure plate 72 is axially located between the opposite friction plates 19 and 39, and the intermediate pressure plate 72 is fixed on the slip ring 70, and the inner periphery of the slip ring 70 is matched with the output shaft 2 in a left helical line; the planetary gear 76 is rotatably set on the planetary gear shaft 78, and the planetary gear shaft 78 is fixed on the planet carrier 75, and the planetary gear 76 is simultaneously meshed with the outer periphery of the slip ring 70 and the driving gear 77 fixed on the outer periphery of the input shaft 1.

[0048] A slip ring 70 is provided on the output shaft 2 and matches the output shaft in a left-handed spiral line. When the input shaft rotates counterclockwise, the slip ring 70 and the intermediate pressure plate 72 move to the right. When the input shaft rotates clockwise, the slip ring 70 and the intermediate pressure plate 72 move to the left. An output plate 28 is fixed on the output shaft.

[0049] When the input shaft 1 rotates counterclockwise (the input shaft 1 rotates forward, which is opposite to the direction in which the one-way sleeve 2 46 can rotate clockwise relative to the housing), the planetary gear 76 transmits the transmission, and the slip ring 70 and the intermediate pressure plate 72 rotate counterclockwise relative to the output shaft 2 and move axially to the right, and the intermediate pressure plate 72 leaves the friction plate 2 39 until the intermediate pressure plate 72 presses the friction plate 19 and the friction plate 18 onto the thrust plate 16. At this time, the slip ring 70 and the intermediate pressure plate 72 cannot move relative to the output shaft 2, and the slip ring 70, the intermediate pressure plate 72, the friction plate 19, the friction plate 18, the thrust plate 16, and the output plate 28 , and the one-way sleeve 26 are formed as a whole, the input shaft 1 drives the planetary gear 76 to rotate around the planetary gear shaft, and the slip ring 70 and the intermediate pressure plate 72, friction plate 19, friction plate 18, thrust plate 16, output plate 28, one-way sleeve 26 and output shaft 2 that are meshed with the planetary gear 76 rotate counterclockwise together (the output shaft 2 and the one-way sleeve 26 can rotate counterclockwise in the same direction relative to the casing, that is, the output shaft 2 rotates in the positive direction), and the torque is transmitted from the input shaft 1, the planetary gear 76, through the slip ring 70, friction plate 19, friction plate 18, thrust plate 16, output plate 28, etc. to the output shaft 2. After 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 pre-rotated clockwise together with the output disc 28, the thrust disc 16, the friction disc 18, the friction plate 19, and the one-way sleeve 26 under the driving force of an external force (i.e., the output shaft 2 is pre-rotated in the reverse direction), since the one-way sleeve 26 cannot rotate clockwise relative to the housing, the output shaft 2 cannot rotate clockwise; at this time, if the output shaft 2 is pre-rotated counterclockwise (i.e., the output shaft 2 is pre-rotated in the forward direction) under the driving force of an external force, the slip ring 70 and the intermediate The pressure plate 72 leaves the friction plate 19 and moves axially toward the friction plate 2 39 until the friction plate 2 39, the friction plate 2 38 and the thrust plate 2 36 are axially compressed. Then the slip ring 70 and the intermediate pressure plate 72 cannot move relative to the output shaft 2. The intermediate pressure plate 72, the friction plate 2 39, the friction plate 2 38, the thrust plate 2 36, the one-way sleeve 2 46 and the planetary carrier 75 form an integral body. However, because the one-way sleeve 2 46 cannot rotate counterclockwise relative to the casing, the output shaft 2 cannot rotate counterclockwise either (i.e., the output shaft 2 cannot rotate in the forward direction).

[0050] When the input shaft 1 rotates clockwise (the input shaft 1 rotates in the opposite direction, which is the same as the direction in which the one-way sleeve 46 can rotate clockwise relative to the casing), the slip ring 70 and the intermediate pressure plate 72 move axially to the left and leave the friction plate 19. At the same time, the intermediate pressure plate 72 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 intermediate pressure plate 72, the friction plate 2 39, the friction plate 2 38, the thrust plate 2 36, the one-way sleeve 2 46, the planetary carrier 75, and the output shaft 2 form an integral whole. The torque is transmitted from the input shaft 1 to the output shaft 2 via the intermediate pressure plate 72, the friction plate 2 39, the friction plate 2 38, the thrust plate 2 36, the planetary carrier 75, etc., and the output shaft 2 and the one-way sleeve 2 46 rotate clockwise under the drive of the input shaft (the output shaft 2 and the one-way sleeve 26 can rotate counterclockwise relative to the casing in the opposite direction, that is, the output shaft 2 rotates in the opposite direction). When the output shaft 2 rotates clockwise for a certain angle, the input shaft stops rotating. At this time, if the output shaft is pre-rotated counterclockwise (i.e., the output shaft 2 is pre-rotated forwardly) together with the planetary carrier 75, the thrust plate 2 36, the friction plate 2 38, the friction plate 2 39, and the one-way sleeve 2 46 under the driving force of an external force, the output shaft cannot rotate counterclockwise because the one-way sleeve 2 46 cannot rotate counterclockwise relative to the housing. At this time, if the output shaft is pre-rotated clockwise (i.e., the output shaft 2 is pre-rotated reversely) under the driving force of an external force, the output shaft cannot rotate counterclockwise. When the output shaft 2 is in the state of being moved (moving), the slip ring 70 and the intermediate pressure plate 72 will move axially to the right toward the friction plate 19, and axially compress the friction plate 19, the friction plate 18, and the thrust plate 16. The slip ring 70, the intermediate pressure plate 72, the friction plate 19, the friction plate 18, the thrust plate 16, the output plate 28, and the one-way sleeve 26 form a whole. Since the one-way sleeve 26 cannot rotate clockwise relative to the casing, the output shaft 2 cannot rotate clockwise either (that is, the output shaft 2 cannot rotate in the opposite direction).

Claims

1. A two-way backstop transmission mechanism with coaxial input and output, characterized by: It includes an input shaft and an output shaft rotatably arranged on a casing, a one-way sleeve 2 and a one-way sleeve 1 are both rotatably arranged on the casing around an axis in a single direction through a one-way bearing, the one-way sleeve 2 and the one-way sleeve 1 are in opposite directions to the casing, and a planet carrier is arranged on the one-way sleeve 2; the axes of the input shaft, the output shaft, the one-way sleeve 2 and the one-way sleeve 1 are coaxial, and the input shaft and the output shaft pass through the center of the one-way sleeve 2 and the one-way sleeve 1 respectively; the output disc 1 is fixed on the output shaft, and the planet carrier, the one-way sleeve 2, the output disc 1 and the one-way sleeve 1 are arranged axially opposite to each other; The intermediate pressure plate is axially located between the one-way sleeve 1 and the one-way sleeve 2 and between the output plate 1 and the planet carrier. The intermediate pressure plate is fixed on the slip ring, and the inner circumference of the slip ring is matched with the output shaft in a spiral line. The planetary gear is rotatably arranged on the planetary carrier around its own axis, and the planetary gear is meshed with the outer periphery of the slip ring and the driving gear fixed on the outer periphery of the input shaft at the same time; When the direction of rotation of the input shaft is the same as the direction in which the one-way sleeve 2 can rotate relative to the casing, the slip ring and the intermediate pressure plate engaged with the planetary gear rotate relative to the output shaft and move toward the one-way sleeve 2 and the planetary carrier along the output shaft axis until the intermediate pressure plate axially presses the one-way sleeve 2 or the planetary carrier, so that the intermediate pressure plate, the one-way sleeve 2 and the planetary carrier form a whole for transmitting torque. When the direction of rotation of the input shaft is opposite to the direction in which the one-way sleeve 2 can rotate relative to the casing, the slip ring and the intermediate pressure plate rotate relative to the output shaft and move toward the one-way sleeve 1 and the output disc 1 along the output shaft axis until the intermediate pressure plate axially presses the one-way sleeve 1 and the output disc 1 at the same time, so that the intermediate pressure plate, the one-way sleeve 1 and the output disc 1 form a whole for transmitting torque.

2. The coaxial input and output bidirectional backstop transmission mechanism according to claim 1, characterized in that: It also includes friction plate 1 and friction plate 2, which are respectively connected to one-way sleeve 1 and one-way sleeve 2 in the axial direction and in the circumferential direction for force transmission; when the input shaft rotates, the planetary gear is driven to rotate through the driving gear, and the slip ring and the intermediate pressure plate meshing with the planetary gear rotate relative to the output shaft and move along the axis of the output shaft until the intermediate pressure plate axially presses the friction plate 2 against the planetary carrier, so that the intermediate pressure plate, the friction plate 2, the planetary carrier and the one-way sleeve 2 form a whole for transmitting torque, or until the intermediate pressure plate axially presses the friction plate 1 against the output disc 1, so that the intermediate pressure plate, the friction plate 1, the one-way sleeve 1 and the output disc 1 form a whole for transmitting torque.

3. The coaxial input and output bidirectional backstop transmission mechanism according to claim 2, 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 one-way shaft sleeve 1.

4. The coaxial input and output bidirectional backstop transmission mechanism according to claim 2, 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 one-way shaft sleeve 1; the outer periphery of the output plate 1 is connected to the friction plate 1 through a spline; the thrust plate 1 is fixed on the outer periphery of the output plate 1; when the direction of rotation of the input shaft is opposite to the direction in which the one-way shaft sleeve 2 can rotate relative to the casing, the intermediate pressure plate 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 driving gear, the planetary gear, and the slip ring, and the output shaft rotates 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 output plate 1, the thrust plate 1, the friction plate 1, the friction plate 1, and the one-way shaft sleeve 1, the output shaft cannot rotate in the reverse direction because the one-way shaft sleeve 1 cannot rotate in the reverse direction relative to the casing.

5. The coaxial input and output bidirectional backstop transmission mechanism according to claim 4, characterized in that: There are multiple friction discs and multiple friction plates, which are staggered in the axial direction.

6. The coaxial input and output bidirectional backstop transmission mechanism according to claim 2, 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 one-way shaft sleeve 2; the outer periphery of the planetary carrier is connected to the friction plate 2 by a spline; the thrust plate 2 is fixed on the outer periphery of the planetary carrier; when the direction of rotation of the input shaft is the same as the direction in which the one-way shaft sleeve 2 can rotate relative to the casing, the planetary gear drives the slip ring and the intermediate pressure plate to rotate relative to the output shaft and move axially toward the friction plate 2 to press the friction plate 2 and the friction plate 2 onto the thrust plate 2. At this time, the slip ring, the intermediate pressure plate, the friction plate 2, the friction plate 2, and the thrust plate 2 The thrust plate 2, the planetary carrier, the one-way sleeve 2 and the output shaft form an integrated structure capable of transmitting torque. The torque is transmitted from the input shaft to the output shaft via the driving gear and the planetary gear, 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 driven by an external force to rotate forward together with the planetary carrier, the thrust plate 2, the friction plate 2, the friction plate 2 and the one-way sleeve 2, the output shaft cannot rotate forward because the one-way sleeve 2 cannot rotate forward relative to the casing.

7. The coaxial input and output bidirectional backstop transmission mechanism according to claim 6, characterized in that: There are multiple friction discs 2 and multiple friction plates 2, which are staggered in the axial direction.

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