Shifting block type bidirectional non-return transmission mechanism

Abstract

The input shaft and the output shaft of the shifting block type bidirectional non-return transmission mechanism are coaxial, and the shifting block type bidirectional non-return transmission mechanism is small in overall size, low in cost and convenient to use. The device comprises an input shaft, an output shaft, a second one-way shaft sleeve and a first one-way shaft sleeve which are coaxial, a middle pressing disc matched with the output shaft in a spiral line mode is arranged on the output shaft, and a first force transmission disc and a second force transmission disc are fixed to the output shaft. An arc-shaped groove is formed in the second force transmission disc, a shifting block arranged between the input shaft and the middle pressing disc penetrates through the arc-shaped groove, when the input shaft rotates by an angle a, the shifting block drives the middle pressing disc to rotate by the angle a relative to the output shaft, the middle pressing disc moves to the first limiting position from the second limiting position in the axial direction, and the central angle of the arc-shaped groove is not smaller than the angle a; when the middle pressing disc is in the first limit position, the middle pressing disc, the first force transmission disc and the first one-way shaft sleeve form a friction type transmission structure capable of transmitting torque; and when the middle pressure plate is in the limiting position II, the middle pressure plate, the force transmission plate II and the one-way shaft sleeve II form a friction type transmission structure capable of 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 block-type bidirectional check transmission mechanism, in which the input shaft of the power component can drive the output shaft to rotate smoothly in the forward direction when it 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 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] The block-type bidirectional check transmission mechanism comprises 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 equivalent to the opposite direction of the casing rotation, 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;

[0010] An intermediate pressure plate that matches the output shaft in a spiral line is arranged on the output shaft, and a force transfer plate 1 and a force transfer plate 2 are fixed on the output shaft; in the axial direction, the two sides of the intermediate pressure plate are respectively one-way sleeve 2, force transfer plate 2 and force transfer plate 1, one-way sleeve 1; an arc groove is opened on the force transfer plate 2, and a shift block that is arranged between the axially opposite input shaft and the intermediate pressure plate and is used to drive the intermediate pressure plate to rotate relative to the output shaft passes through the arc groove, when the input shaft rotates by angle a, the shift block drives the intermediate pressure plate to rotate by angle a relative to the output shaft, and the intermediate pressure plate moves from the extreme position 2 to the extreme position 1 in the axial direction, and the center angle of the arc groove is not less than angle a;

[0011] When the intermediate pressure plate is in the extreme position one, the intermediate pressure plate presses the force transfer plate one and the one-way sleeve one, so that the intermediate pressure plate, the force transfer plate one and the one-way sleeve one form a friction transmission structure capable of transmitting torque; when the intermediate pressure plate is in the extreme position two, the intermediate pressure plate presses the force transfer plate two and the one-way sleeve two, so that the intermediate pressure plate, the force transfer plate two and the one-way sleeve two form a friction transmission structure capable of transmitting torque.

[0012] When it is working, when the direction of rotation of the input shaft of the power component is opposite to the direction in which the one-way sleeve 2 can rotate relative to the casing, the intermediate pressure plate moves axially to the limit position 1 to press the force transmission plate 1 and the one-way sleeve 1, so that the intermediate pressure plate, the force transmission plate 1 and the one-way sleeve 1 form a friction transmission structure that can transmit torque, and the input shaft continues to rotate, and the torque is transmitted from the input shaft to the output shaft through the intermediate pressure plate and the force transmission plate 1, and the output shaft rotates forwardly under the drive of the input shaft; when the output shaft rotates forwardly after a certain angle, the input shaft stops rotating. At this time, the output shaft is like an external When the output shaft is driven by external force to rotate in the reverse direction opposite to the forward direction together with the force transfer 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. At this time, if the output shaft is driven by external force to rotate in the forward direction, the intermediate pressure plate will move axially to the extreme position 2 to press the force transfer plate 2 and the one-way sleeve 2, so that the intermediate pressure plate, the force transfer plate 2 and the one-way sleeve 2 form a friction transmission structure that can transmit torque. 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.

[0013] When the direction of rotation of the input shaft is the same as the direction in which the one-way sleeve two can rotate relative to the casing, the intermediate pressure plate moves axially toward the one-way sleeve two to the limit position two to press the one-way sleeve two and the force transfer plate two, and the torque is transmitted from the input shaft to the output shaft through the intermediate pressure plate and the force transfer plate two, 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 two and the one-way sleeve two under the drive of an external force, since the one-way sleeve two cannot rotate forwardly relative to the casing, 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 intermediate pressure plate will move axially toward the one-way sleeve one to the limit position one to press the one-way sleeve one and the force transfer plate one. Since the one-way sleeve one cannot rotate in the opposite direction relative to the casing, the output shaft cannot rotate in the opposite direction either.

[0014] The above-mentioned block-type bidirectional check 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 in the circumferential direction for force transmission; in the extreme position 1, the middle pressure plate axially presses the friction plate 2 against the force transmission plate 2, so that the middle pressure plate, friction plate 2, force transmission plate 2 and one-way sleeve 2 form a whole for transmitting torque; in the extreme position 1, the middle pressure plate axially presses the friction plate 1 against the force transmission plate 1, so that the middle pressure plate, friction plate 1, one-way sleeve 1 and force transmission plate 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 shift block drives 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 tightly against the force transmission plate 1. The intermediate pressure plate, friction plate 1, one-way sleeve 1 and force transmission plate 1 form an integrated structure for transmitting torque, 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 force transmission plate 2. The input shaft drives the output shaft, the intermediate pressure plate, the friction plate 1, the force transmission plate 1 and the one-way sleeve 1 to rotate forward together through the shift block; when the output shaft rotates forward by a certain angle, the input shaft stops rotating. At this time, the output shaft If the output shaft is driven by external force to rotate in the opposite direction together with the force transfer plate 1, friction plate 1 and one-way sleeve 1, the output shaft cannot rotate in the opposite direction because the one-way sleeve 1 cannot rotate in the opposite direction relative to the casing; if the output shaft is driven by external force to rotate in the positive direction, the intermediate pressure plate will rotate relative to the output shaft and move axially away from the friction plate 1, and the intermediate pressure plate will move toward the friction plate 2 until the friction plate 2 is pressed tightly against the force transfer plate 2, and then the intermediate pressure plate stops moving. At this time, the intermediate pressure plate, friction plate 2, force transfer plate 2 and one-way sleeve 2 form an integrated structure that can transmit torque, and the intermediate pressure plate etc. can only rotate together with the output shaft, but because the one-way sleeve 2 cannot rotate in the positive direction relative to the casing, the output shaft cannot rotate in the positive direction either.

[0016] In the above-mentioned shift block type 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 one-way shaft sleeve 1.

[0017] The above-mentioned block-type two-way check transmission mechanism has an outer periphery of a friction plate connected to a friction plate sleeve by a spline, and the friction plate sleeve is fixedly connected to a one-way shaft sleeve; an outer periphery of a force transmission plate is connected to a friction plate by a spline; a thrust plate is fixed to an outer periphery of the force transmission plate; in an extreme position, an intermediate pressure plate presses the friction plate and the friction plate against the thrust plate, so that the intermediate pressure plate, friction plate, friction plate, thrust plate, force transmission plate, one-way shaft sleeve and output shaft form an integrated structure capable of transmitting torque.

[0018] 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 intermediate pressure plate moves axially toward the friction plate 1 to press the friction plate 1 and friction plate 1 against the thrust plate 1, so that the intermediate pressure plate, friction plate 1, friction plate 1, thrust plate 1, force transfer plate 1, one-way sleeve 1 and output shaft form an integrated structure that can transmit torque. The torque is transmitted from the input shaft to the output shaft through the shift block and the intermediate pressure plate, 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 opposite direction together with the force transfer plate 1, thrust plate 1, friction plate 1, friction plate 1 and one-way sleeve 1, the output shaft cannot rotate backward relative to the casing because the one-way sleeve 1 cannot rotate backward relative to the casing.

[0019] The above-mentioned shift block type two-way check transmission mechanism has a plurality of friction discs 1 and a plurality of friction plates 1, which are arranged alternately in the axial direction.

[0020] The above-mentioned block-type bidirectional check transmission mechanism has an outer periphery of the second friction plate 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 second force transmission plate is connected to the second friction plate by a spline; the second thrust plate is fixed on the outer periphery of the second force transmission plate; in the second extreme position, the intermediate pressure plate presses the second friction plate and the second friction plate against the second thrust plate, so that the intermediate pressure plate, the second friction plate, the second friction plate, the second thrust plate, the second force transmission plate, the second one-way shaft sleeve and the output shaft form an integrated structure that can transmit torque.

[0021] 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 torque is transmitted from the input shaft to the output shaft through the shift block and the intermediate pressure plate, 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 force transfer plate 2, 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.

[0022] The above-mentioned shift block type two-way check transmission mechanism has a plurality of friction discs 2 and a plurality of friction plates 2, which are arranged alternately in the axial direction.

[0023] In the above-mentioned shift block type two-way check transmission mechanism, the shift block is fixed on the input shaft, and the shift block passes through the arc groove and extends into the groove opened on the intermediate pressure plate, or the shift block is fixed on the intermediate pressure plate, and the shift block passes through the arc groove and extends into the groove opened on the input shaft.

[0024] The above-mentioned shift block type two-way check transmission mechanism has two arc grooves and two shift blocks, both of which are symmetrically arranged with the output shaft axis as the symmetry axis.

[0025] 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.

[0026] 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.

[0027] 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.

[0028] 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.

[0029] 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.

[0030] 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 intermediate pressure plate moves axially to disengage from the force transfer plate 2 and the one-way sleeve 2. At the same time, the intermediate pressure plate moves axially to press the force transfer plate 1 and the one-way sleeve 1 (in the extreme position 1), so that the intermediate pressure plate, the force transfer plate 1 and the one-way sleeve 1 form a friction transmission structure that can transmit torque. Since the intermediate pressure plate cannot move relative to the output shaft, the input shaft, the shift block, the intermediate pressure plate, the output shaft, the force transfer plate 1 and the one-way sleeve 1 rotate in the forward direction together, 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, the output shaft When the output shaft is pre-rotated in the reverse direction together with the force transfer plate 1 and the one-way sleeve 1 under the driving of external force, since the intermediate pressure plate, the force transfer plate 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 pre-rotated in the forward direction under the driving of external force, the intermediate pressure plate rotates relative to the output shaft and moves axially to the extreme position 2, pressing the force transfer plate 2 and the one-way sleeve 2, so that the intermediate pressure plate, the force transfer plate 2 and the one-way sleeve 2 form a friction transmission structure capable of transmitting 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.

[0031] When the input shaft rotates in the opposite direction, the intermediate pressure plate moves axially and disengages from the force transfer plate 1 and the one-way sleeve 1. At the same time, after the intermediate pressure plate moves axially to the limit position 2 and presses the force transfer plate 2 and the one-way sleeve 2, the intermediate pressure plate cannot move relative to the output shaft. The intermediate pressure plate, the force transfer plate 2 and the one-way sleeve 2 form an integrated structure that can transmit torque. The torque is transmitted from the input shaft to the output shaft through the shift block and the intermediate pressure plate. 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 external force and is in contact with the force transfer plate 2 and the one-way sleeve 2, When the one-way sleeve two is pre-rotated forwardly, the output shaft cannot rotate forwardly because the one-way sleeve two cannot rotate forwardly relative to the casing; when the output shaft is pre-rotated reversely under the drive of external force, the intermediate pressure plate will move axially, loosening the force transfer plate two and the one-way sleeve two. After the intermediate pressure plate moves to the extreme position - pressing the force transfer plate one and the one-way sleeve one, the intermediate pressure plate cannot move relative to the output shaft. The intermediate pressure plate, the force transfer plate one and the one-way sleeve one form an integrated structure that can transmit torque. Since the one-way sleeve one cannot rotate reversely relative to the casing, the output shaft cannot rotate reversely either.

[0032] 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 force transfer 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, the force transfer plate 2, and 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.

[0033] 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.

[0034] The block-type bidirectional check 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

[0035] Figure 1 It is a schematic diagram of a bidirectional non-return transmission mechanism of the prior art;

[0036] Figure 2 It is a schematic diagram of a block-type bidirectional check transmission mechanism;

[0037] Figure 3 It is a schematic diagram of the relative relationship between the output shaft, the second force transmission plate, the intermediate pressure plate, etc.;

[0038] Figure 4 It is a schematic diagram of the relative relationship between the input shaft, intermediate pressure plate, etc.

[0039] 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,

[0040] Input shaft 1, output shaft 2, housing 10,

[0041] 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,

[0042] 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,

[0043] Intermediate pressure plate 72, one-way bearing 80, one-way sleeve 1 26, one-way sleeve 2 46,

[0044] Arc groove 91, shift block 92, groove 93. DETAILED DESCRIPTION

[0045] 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.

[0046] See also Figure 2 The block-type bidirectional check transmission mechanism shown.

[0047] 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.

[0048] 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 force transmission plate 15 is connected to the friction disc 18 through a spline. The outer periphery of the force transmission plate 15 is fixed with a thrust plate 16.

[0049] 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 force transmission plate 35 is connected to the friction disc 38 through a spline. The outer periphery of the force transmission plate 35 is fixed with the thrust plate 36.

[0050] The inner circumference of the middle pressure plate 72 is matched with the output shaft 2 in a left spiral line; a force transmission plate 1 15 and a force transmission plate 2 35 are fixed on the output shaft 2. The force transmission plate 1 15 and the force transmission plate 2 35 are located on both sides of the middle pressure plate 72.

[0051] A guide pin 21 is fixed on the right side of the intermediate pressure plate 72, and a pressure plate 12 is axially slidably arranged on the guide pin 21. An elastic element 1 is arranged between the pressure plate 12 and the right side of the intermediate pressure plate 72 to push the pressure plate 12 to move axially along the guide pin 1 toward the friction plate 19.

[0052] A guide pin 41 is fixed on the left side of the intermediate pressure plate 72, and the pressure plate 32 is axially slidably arranged on the guide pin 41. An elastic element 2 is arranged between the pressure plate 32 and the left side of the intermediate pressure plate 72 for pushing the pressure plate 32 to move axially along the guide pin 2 toward the friction plate 39.

[0053] The pressure plate 1 12 and the pressure plate 2 32 on both sides of the middle pressure plate 72 are axially opposite to the friction plate 1 19 and the friction plate 2 39 respectively.

[0054] Two arc grooves 91 are provided on the force transmission disc 2 35, and the two arc grooves 91 are symmetrically arranged with the axis of the output shaft as the axis of symmetry. Two shift blocks 92 are symmetrically arranged at one end of the input shaft 1 with the axis of the input shaft as the axis of symmetry, and two grooves 93 are arranged on the end face of the intermediate pressure plate 72 opposite to the shift blocks, and the shift blocks 92 extend into the grooves 93 through the arc grooves 91. When the input shaft 1 rotates and the shift blocks 92 drive the intermediate pressure plate 72 to rotate relative to the output shaft 2, the intermediate pressure plate 72 moves axially on the output shaft. When the input shaft rotates by an angle a, the intermediate pressure plate is driven by the shift blocks to rotate by an angle a relative to the output shaft, and the intermediate pressure plate moves axially from the extreme position 2 to the extreme position 1, and the center angle of the arc groove is not less than the angle a. In other words, when the intermediate pressure plate changes axially from the extreme position 2 to the extreme position 1, the arc groove will not hinder the rotation of the shift blocks.

[0055] When the middle pressure plate is at the limit position one, the pressure plate one presses the friction plate one and the friction plate one onto the thrust plate one, so that the middle pressure plate, the pressure plate one, the friction plate one, the friction plate one, the thrust plate one, the force transmission plate one, the one-way shaft sleeve one, and the output shaft form an integrated structure capable of transmitting torque. When the middle pressure plate is at the limit position two, the pressure plate two presses the friction plate two and the friction plate two onto the thrust plate two, so that the middle pressure plate, the pressure plate two, the friction plate two, the friction plate two, the thrust plate two, the force transmission plate two, the one-way shaft sleeve two, and the output shaft form an integrated structure capable of transmitting torque.

[0056] 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 intermediate pressure plate 72 rotates counterclockwise relative to the output shaft 2 and moves axially to the right through the shift block 92, and the pressure plate 2 32 leaves the friction plate 2 39 until the pressure plate 12 presses the friction plate 19 and the friction plate 18 onto the thrust plate 16. At this time, the intermediate pressure plate 72 is located at the limit position 1, and the intermediate pressure plate 72 cannot move relative to the output shaft 2. The intermediate pressure plate 72, the friction plate 19, the friction plate 18, and the thrust plate 16 , transfer plate 15, and one-way sleeve 26 form an integral whole. When the input shaft 1 continues to rotate, the shift block 92 drives the intermediate pressure plate 72, friction plate 19, friction plate 18, thrust plate 16, transfer plate 15, one-way sleeve 26, and output shaft 2 to rotate counterclockwise (the output shaft 2 and the one-way sleeve 26 can rotate counterclockwise relative to the casing in the same direction, that is, the output shaft 2 rotates in the positive direction), and the torque is transmitted from the input shaft 1 and the shift block 92 to the output shaft 2 via the intermediate pressure plate 72, friction plate 19, friction plate 18, thrust plate 16, transfer plate 15, etc. 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 transmission plate 15, the thrust plate 16, the friction plate 18, the friction plate 19, and the one-way sleeve 26 (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 driven by an external force to rotate counterclockwise (i.e., the output shaft 2 is pre-rotated in the forward direction), the intermediate pressure plate 72 and the pressure plate 12 leave the friction plate. 19, moves axially toward the friction plate 2 39 until the pressure plate 2 32, friction plate 2 39, friction plate 2 38, and thrust plate 2 36 are axially compressed, and the intermediate pressure plate 72 is located at the extreme position 2. The intermediate pressure plate 72 cannot move relative to the output shaft 2. The intermediate pressure plate 72, pressure plate 2 32, friction plate 2 39, friction plate 2 38, thrust plate 2 36, one-way sleeve 2 46, and force transfer plate 2 35 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 (that is, the output shaft 2 cannot rotate forward).

[0057] 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 2 46 can rotate clockwise relative to the housing), the intermediate pressure plate 72 moves axially to the left through the shift block 92, and the pressure plate 12 leaves the friction plate 19 until the pressure plate 2 32 moves axially to the left to press the friction plate 2 39 and the friction plate 2 38 onto the thrust plate 2 36. The intermediate pressure plate 72 is located at the limit position 2. The intermediate pressure plate 72, the pressure plate 2 32, the friction plate 2 39, the friction plate 2 38, and the thrust plate 2 36 are in the limit position 2. 6. The one-way sleeve 46, the force transfer plate 35 and the output shaft 2 are integrated, and the input shaft 1 continues to rotate. The torque is transmitted from the input shaft 1 and the shift block 92 to the output shaft 2 via the intermediate pressure plate 72, the friction plate 39, the friction plate 38, the thrust plate 36, the one-way sleeve 46, the force transfer plate 35, etc. The output shaft 2 and the one-way sleeve 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 housing, that is, the output shaft 2 rotates in the opposite direction). After 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 together with the force transmission plate 2 35, 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 (i.e., the output shaft 2 is pre-rotated forward), since the one-way sleeve 2 46 cannot rotate counterclockwise relative to the housing, the output shaft cannot rotate counterclockwise. At this time, if the output shaft is pre-rotated clockwise under the driving force of an external force (i.e., the output shaft 2 is pre-rotated reversely), The intermediate pressure plate 72 and the pressure plate 12 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 intermediate pressure plate 72 is located at the extreme position 1. The intermediate pressure plate 72, the friction plate 19, the friction plate 18, the thrust plate 16, the force transfer plate 15 and the one-way sleeve 26 are formed into one body. Since the one-way sleeve 26 cannot rotate clockwise relative to the casing, the output shaft 2 cannot rotate clockwise (that is, the output shaft 2 cannot rotate in the opposite direction).

Claims

1. The block-type bidirectional check transmission mechanism is characterized by: It includes an input shaft and an output shaft rotatably arranged on the casing, a one-way sleeve 2 and a one-way sleeve 1 are both rotatably arranged on the casing around an axis in one direction through a one-way bearing, the one-way sleeve 2 and the one-way sleeve 1 are equivalent to the opposite direction of the casing rotation, 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; An intermediate pressure plate is arranged on the output shaft and is matched with the output shaft in a spiral line. A force transfer plate 1 and a force transfer plate 2 are fixed on the output shaft. In the axial direction, two sides of the intermediate pressure plate are respectively one-way sleeve 2 and force transfer plate 2 and force transfer plate 1 and one-way sleeve 1. An arc groove is formed on the second force transmission plate, and a shifting block arranged between the axially opposite input shaft and the intermediate pressure plate for driving the intermediate pressure plate to rotate relative to the output shaft passes through the arc groove. When the input shaft rotates at an angle a, the shifting block drives the intermediate pressure plate to rotate at an angle a relative to the output shaft, and the intermediate pressure plate moves axially from the second limit position to the first limit position, and the central angle of the arc groove is not less than the angle a. When the intermediate pressure plate is in the extreme position one, the intermediate pressure plate presses the force transfer plate one and the one-way sleeve one, so that the intermediate pressure plate, the force transfer plate one and the one-way sleeve one form a friction transmission structure capable of transmitting torque; when the intermediate pressure plate is in the extreme position two, the intermediate pressure plate presses the force transfer plate two and the one-way sleeve two, so that the intermediate pressure plate, the force transfer plate two and the one-way sleeve two form a friction transmission structure capable of transmitting torque.

2. The block-type bidirectional check transmission mechanism according to claim 1, characterized in that: It also includes friction plate 1 and friction plate 2, which respectively move axially and are connected to one-way sleeve 1 and one-way sleeve 2 in circumferential force transmission; at extreme position 1, the middle pressure plate axially presses the friction plate 2 against the force transmission plate 2, so that the middle pressure plate, friction plate 2, force transmission plate 2 and one-way sleeve 2 form a whole for transmitting torque; at extreme position 1, the middle pressure plate axially presses the friction plate 1 against the force transmission plate 1, so that the middle pressure plate, friction plate 1, one-way sleeve 1 and force transmission plate 1 form a whole for transmitting torque.

3. The block-type bidirectional check 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 block-type bidirectional check transmission mechanism according to claim 2, characterized in that: The outer periphery of friction plate 1 is connected to friction plate sleeve 1 by splines, and friction plate sleeve 1 is fixedly connected to one-way shaft sleeve 1; the outer periphery of force transmission plate 1 is connected to friction plate 1 by splines; thrust plate 1 is fixed to the outer periphery of force transmission plate 1; in extreme position 1, the intermediate pressure plate presses friction plate 1 and friction plate 1 tightly against thrust plate 1, so that the intermediate pressure plate, friction plate 1, friction plate 1, thrust plate 1, force transmission plate 1, one-way shaft sleeve 1 and output shaft form an integrated structure capable of transmitting torque; when the direction of rotation of the input shaft is opposite to the direction in which one-way shaft sleeve 2 can rotate relative to the casing, the intermediate pressure plate moves axially toward friction plate 1 to press friction plate 1 and friction plate 1 tightly against thrust plate 1 When the push plate is on, the intermediate pressure plate, friction plate, friction plate, thrust plate, force transfer plate, one-way shaft sleeve 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 shift block and the intermediate pressure plate. 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 force transfer plate, thrust plate, friction plate, friction plate and one-way shaft sleeve, the output shaft cannot rotate in the reverse direction because the one-way shaft sleeve cannot rotate in the reverse direction relative to the casing.

5. The block-type bidirectional check 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 block-type bidirectional check 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 force transmission plate 2 is connected to the friction plate 2 by a spline; the thrust plate 2 is fixed on the outer periphery of the force transmission plate 2; in the second extreme position, the intermediate pressure plate presses the friction plate 2 and the friction plate 2 against the thrust plate 2, so that the intermediate pressure plate, the friction plate 2, the friction plate 2, the thrust plate 2, the force transmission plate 2, the one-way shaft sleeve 2, and the output shaft form an integrated structure capable of transmitting torque; 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 torque is transmitted from the input shaft to the output shaft through the shift block and the intermediate pressure plate, 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 force transmission plate 2, the thrust plate 2, the friction plate 2, the friction plate 2, and the one-way shaft sleeve 2, the output shaft cannot rotate forward because the one-way shaft sleeve 2 cannot rotate forward relative to the casing.

7. The block-type bidirectional check 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.

8. The block-type bidirectional check transmission mechanism according to claim 1, characterized in that: The shift block is fixed on the input shaft, and the shift block extends into the groove opened on the middle pressure plate through the arc groove, or the shift block is fixed on the middle pressure plate, and the shift block extends into the groove opened on the input shaft through the arc groove.

9. The block-type bidirectional check transmission mechanism according to claim 8, characterized in that: There are two arc grooves and two shift blocks, both of which are symmetrically arranged with the axis of the output shaft as the symmetry axis.

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