Ratchet self-locking device

Abstract

The present invention discloses a ratchet self-locking device, which belongs to the technical field of mechanical ratchet switches, wherein the device includes a transmission mechanism and a ratchet mechanism, the transmission mechanism includes a frame, a gear and a support shaft, the gear is sleeved on the outside of the support shaft and rotatably cooperates with the first end of the support shaft, and the second end of the support shaft rotatably cooperates with the frame; the side wall of the first claw plate is installed on the frame, the inner wall of the first claw plate cooperates with the first end of the first pawl member, and is used to lock the first pawl member to rotate in the first direction; the second end of the first pawl member is connected to the first end of the first elastic member, and the second end of the first elastic member is installed on the support shaft; the first pawl member has a first inclined surface tangent to the outer wall of the first gear pin, the first end of the first gear pin is installed on the side wall of the gear, and the second end of the first gear pin is used to abut against the first inclined surface; the rotation or locking of the gear can be achieved by only setting the torque of the gear and the elastic force of the first elastic member.

Description

Technical Field

[0001] The present invention belongs to the technical field of mechanical ratchet switches, and in particular relates to a ratchet self-locking device. Background Art

[0002] Currently, mechanical devices capable of bidirectional transmission typically use electric motors as their power source, with the current direction of the motor being redirected to achieve bidirectional transmission. In some applications where transmission efficiency is less demanding or usage is infrequent, a transmission device capable of bidirectional locking solely by human effort is needed to conserve energy and reduce consumption and investment. This approach offers both cost-saving and labor-saving advantages, along with simplicity, reliability, and safety.

[0003] Existing bidirectional transmission mechanical devices generally utilize a pawl and a ratchet wheel. Engaging the pawl with the ratchet wheel locks the ratchet wheel, rendering the bidirectional transmission mechanical device stationary. However, existing ratchet mechanisms are cumbersome to operate, requiring the ratchet mechanism to be disassembled or engaged with a gear in order to open or lock the mechanism, making them less practical. Summary of the Invention

[0004] The object of the present invention is to provide a ratchet self-locking device, which realizes the locking of a transmission device and has strong practicality without the need to disassemble or install a ratchet mechanism.

[0005] The technical solution is as follows:

[0006] A ratchet self-locking device comprises: a transmission mechanism and a ratchet mechanism, wherein the transmission mechanism comprises a frame, a gear and a support shaft, wherein the gear is sleeved on the outside of the support shaft and rotatably engaged with a first end of the support shaft, and the second end of the support shaft is rotatably engaged with the frame;

[0007] The ratchet mechanism includes a first pawl plate member, a first pawl member, a first elastic member and a first gear pin, the side wall of the first pawl plate member is mounted on the frame, the inner wall of the first pawl plate member cooperates with the first end of the first pawl member and is used to lock the first pawl member to rotate in the first direction; the second end of the first pawl member is connected to the first end of the first elastic member, and the second end of the first elastic member is mounted on the support shaft; wherein, the first pawl member has a first inclined surface tangent to the outer wall of the first gear pin, the first end of the first gear pin is mounted on the side wall of the gear, and the second end of the first gear pin is used to abut against the first inclined surface.

[0008] In one embodiment, the ratchet mechanism further includes a second pawl disc, a second pawl member, a second elastic member, and a second gear pin, wherein a side wall of the second pawl disc is mounted on the frame, an inner wall of the second pawl disc cooperates with a first end of the second pawl member and is used to lock the second pawl member from rotating in a second direction, wherein the first direction is opposite to the second direction; the second end of the second pawl member is connected to the first end of the second elastic member, the second end of the second elastic member is mounted on the support shaft, and the first elastic member and the second elastic member are arranged opposite to each other;

[0009] In which, the first gear pin and the second gear pin are arranged opposite to each other, and the first gear pin or the second gear pin is parallel to the axis of the gear; the second pawl member has a second inclined surface tangent to the outer wall of the second gear pin, the first end of the second gear pin is installed on the side wall of the gear, and the second end of the second gear pin is used to abut against the second inclined surface.

[0010] In one embodiment, the first pawl member includes a first pawl body, a first hook and a first stopper, wherein the first stopper and the first hook are both mounted on a side wall of the first pawl body, a first active position is formed between the first stopper and the first hook, and the second end of the first gear pin is located in the first active position;

[0011] The cross-section of the first stop block is triangular, the first inclined surface is located on the hypotenuse of the first stop block and faces the first active position; the first claw body has a mounting cavity for accommodating the first elastic member, the length direction of the mounting cavity intersects with the axial center line of the support shaft, and the first hook is retractable in the radial direction of the support shaft through the first elastic member.

[0012] In one embodiment, a first barb is provided at the end of the first hook; the first claw plate is provided with a first groove, the first groove matches the shape of the end of the first hook, the side wall of the first groove abuts against the outer wall of the first barb, the bottom of the first groove contacts the oblique side of the first barb, and the first barb is used to abut against the first groove in the first direction.

[0013] In one embodiment, the second pawl member includes a second pawl body, a second hook and a second stopper, wherein the second stopper and the second hook are both mounted on a side wall of the second pawl body, a second active position is formed between the second stopper and the second hook, and the second end of the second gear pin is located in the second active position;

[0014] The cross section of the second stopper is triangular in shape. The second inclined surface is located on the oblique side of the second stopper and faces the second active position. The second hook is retractable in the radial direction of the support shaft through the second elastic member.

[0015] In one embodiment, the end of the second hook is provided with a second barb; the second claw plate is provided with a second groove, the second groove matches the shape of the end of the second hook, and the second barb is used to abut against the second groove in the second direction; the oblique side of the first groove and the oblique side of the second groove are arranged in opposite directions;

[0016] The first barb and the second barb are staggered in the direction of the axis of the support shaft; and / or the first groove and the second groove are staggered in the direction of the axis of the support shaft.

[0017] In one embodiment, the ratchet mechanism further includes a pawl seat and a pawl disc sleeve, the pawl disc sleeve is sleeved on the outside of the first pawl disc member and the outside of the second pawl disc member, and the side wall of the pawl disc sleeve is fixed to the side wall of the frame;

[0018] The pawl seat is sleeved on the outside of the support shaft and is located in the pawl disc sleeve. The pawl seat is provided with a first guide groove, which extends along the moving direction of the first pawl member. The first pawl member is located in the first guide groove.

[0019] In one embodiment, the pawl seat includes a mounting plate, a first limiting plate and a second limiting plate, the mounting plate having a through hole for the support shaft to pass through, the first limiting plate and the second limiting plate are both mounted on the mounting plate, and the first limiting plate is parallel to the second limiting plate;

[0020] The first guide groove is formed between the first limiting plate and the second limiting plate. The first limiting groove is provided on the inner sides of the first limiting plate and the second limiting plate. The first limiting groove extends along the moving direction of the first pawl member. The first limiting groove communicates with the first guide groove. The side wall of the first pawl member is provided with a first ridge that cooperates with the first limiting groove.

[0021] The pawl seat further includes a third limiting plate and a fourth limiting plate, both of which are mounted on the mounting plate, and the third limiting plate is arranged opposite to the first limiting plate, and the fourth limiting plate is arranged opposite to the second limiting plate;

[0022] A second guide groove is formed between the third limiting plate and the fourth limiting plate, and the second pawl member is located in the second guide groove; a second limiting groove is provided on the inner sides of the third limiting plate and the fourth limiting plate, and the second limiting groove extends along the moving direction of the second pawl member. The second limiting groove is communicated with the second guide groove, and the side wall of the second pawl member is provided with a second ridge that cooperates with the second limiting groove.

[0023] In one embodiment, the pawl seat is further provided with a support frame, which is fixed to the side wall of the mounting plate; the support frame includes an axle pin, a connector and two side plates, the two side plates are installed on both sides of the connector, the connector is located in the middle of the side plates, and a first fixed position and a second fixed position are formed between the two side plates and the connector, the first limiting plate and the second limiting plate are located in the first fixed position, and the third limiting plate and the fourth limiting plate are located in the second fixed position;

[0024] The connecting body is provided with an axial hole for the support shaft to pass through, and the connecting body and the side plate are both provided with fixing holes for the axial pin to pass through, so that the support frame is key-connected to the support shaft through the axial pin, and the fixing hole intersects with the axial hole.

[0025] In one embodiment, the ratchet self-locking device also includes a lock disk seat, a sleeve, a nut and a gasket, the first end of the sleeve is installed on the side wall of the lock disk seat, and the second end of the sleeve is sleeved on the second end of the support shaft; the gasket is sleeved on the outside of the support shaft, the nut is threadedly connected to the first end of the support shaft, and the gasket is located between the gear and the nut.

[0026] The technical solution provided by the present invention has the following advantages and effects:

[0027] 1. The gear is sleeved on the outside of the support shaft, and the gear can be used as an idler gear. When the gear is not driven by an external force, the first claw plate member cooperates with the first pawl member, and the first gear pin abuts against the first inclined surface of the first pawl member. After the first claw plate member and the first pawl member are locked, the first pawl member restricts the rotation of the first gear pin, thereby locking the gear; when locking the first direction of the gear, it is only necessary to make the groove of the first claw plate member and the hook claw of the first pawl member correspond in the forward or reverse direction, and the first direction can be clockwise or counterclockwise; when the gear needs to rotate, a force is applied to the gear to make it pass in the circumferential direction. The first pawl member is squeezed by the first gear pin. Since the outer wall of the first gear pin is tangent to the first inclined surface of the first pawl member, the first pawl member compresses the first elastic member after being squeezed, so that the first pawl member moves radially along the support shaft through the first elastic member. When the force acting on the driving gear is greater than the elastic force of the first elastic member, the first pawl member moves a certain distance, so that the first pawl member is separated from the first claw plate member, and the gear rotates normally, thereby realizing the locking of the transmission device. In addition, the practicality is strong. Gear locking or rotation can be achieved by only setting the torque of the gear and the elastic force of the first elastic member, without the need to disassemble or install the ratchet mechanism.

[0028] 2. When the gear is not driven by an external force, the second claw plate cooperates with the second pawl member, and the second gear pin abuts against the second inclined surface of the second pawl member, so that after the second claw plate and the second pawl member are locked, the second pawl member restricts the rotation of the second gear pin, thereby locking the gear; when locking the second direction of the gear, it is only necessary to make the groove of the second claw plate and the hook of the second pawl member correspond in the forward direction, and the first direction is opposite to the second direction. When the first direction is counterclockwise, the second direction is clockwise; if the gear needs to rotate, a force is applied to the gear so that it squeezes the second pawl member through the second gear pin in the circumferential direction. Since the outer wall of the second gear pin is tangent to the second inclined surface of the second pawl member, the second pawl member After being squeezed, the second elastic member is compressed, so that the second pawl member moves radially along the support shaft through the second elastic member. When the force acting on the driving gear is greater than the elastic force of the second elastic member, the second pawl member moves a certain distance, so that the second pawl member is separated from the second claw plate member, and the gear rotates normally; moreover, when the gear rotates in the forward direction, a first elastic member is provided between the first pawl member and the support shaft, so that the first pawl member is squeezed by the first claw plate member under the driving force and moves radially toward the support shaft, so that the first claw plate member will not lock the first pawl member to rotate in the clockwise direction; similarly, the second claw plate member will not lock the second pawl member to rotate in the counterclockwise direction. With this arrangement, bidirectional locking of the transmission device in counterclockwise or clockwise direction is achieved.

[0029] 3. A first stopper with a triangular cross-section is used, so that the first stopper has a first inclined surface that abuts against the first gear pin, and a first active position is formed between the first hook and the first stopper. The first gear pin extends into the first active position. When the first gear pin is rotated by the gear, the first inclined surface is squeezed. Since the first claw body has a mounting cavity for accommodating the first elastic member, the first hook has a moving path in the radial direction of the support shaft through the first elastic member, so that after the first stopper is squeezed, it moves the first hook toward the radial direction of the support shaft, thereby moving the first hook away from the inner wall of the first claw disk. The first hook is separated from the first claw disk, and the switch of the ratchet mechanism in the first direction is opened, which does not affect the counterclockwise rotation of the gear, further realizing that the gear can be freely switched to open or lock without disassembling or installing the ratchet mechanism.

[0030] 4. The first barb is matched with the first groove, and the first barb is used to abut against the first groove in the first direction, so that the first groove locks the first barb to rotate in the counterclockwise direction, and the bottom of the first groove contacts the oblique side of the first barb, so that when the first barb rotates in the second direction, the bottom of the first groove is subjected to the force of the first barb, and a reverse force is applied to the first barb, and the first barb is squeezed, so that the first barb moves radially toward the support shaft through the first elastic member, thereby not affecting the rotation of the first barb in the second direction, further improving the flexibility of the ratchet self-locking device.

[0031] 5. A second block with a triangular cross-section is used, so that the second block has a second inclined surface that abuts against the second gear pin, and a second active position is formed between the second hook and the second block. The second gear pin extends into the second active position. When the second gear pin is rotated by the gear, the second inclined surface is squeezed. Since the second hook has a moving path in the radial direction of the support shaft through the second elastic member, the second hook is squeezed and moves with the second block in the radial direction of the support shaft, thereby moving the second hook away from the inner wall of the second claw disk. The second hook is separated from the second claw disk, and the switch of the ratchet mechanism in the second direction is opened, which does not affect the clockwise rotation of the gear, further realizing that the gear can be freely switched to open or lock without disassembling or installing the ratchet mechanism.

[0032] 6. The second barb cooperates with the second groove, and the second barb is used to abut with the second groove in the second direction, so that the second groove locks the second barb to rotate in the counterclockwise direction; the hypotenuses of the first groove and the second groove are arranged in opposite directions, so that the first groove can lock the first barb to rotate in the first direction, and the second groove locks the second barb to rotate in the second direction; moreover, the first barb and the second barb are staggered in the axial centerline direction of the support shaft, the first barb cooperates with the first groove, and the second barb cooperates with the second groove, and the two respectively lock the first direction and the second direction of the gear, and the two are opposed to each other and do not interfere with each other, thereby realizing two-way locking of the ratchet self-locking device.

[0033] 7. The first claw plate member and the second claw plate member are fixed to the side wall of the frame through the claw plate sleeve, so that the first claw plate member and the second claw plate member lock the first pawl member and the second pawl member respectively; and the first pawl member is embedded in the pawl seat, so that the first pawl member moves in the first guide groove, thereby improving the stability of the cooperation between the first pawl member and the first claw plate member.

[0034] 8. A first guide groove is formed between the first limiting plate and the second limiting plate, so that the first pawl member moves in the first guide groove and is restricted in its movement direction by the first limiting plate and the second limiting plate. Moreover, the first pawl member cooperates with the first limiting groove via a first ridge, thereby improving the stability of the first pawl member moving in the first guide groove and further restricting its movement direction. A second guide groove is formed between the third limiting plate and the fourth limiting plate, so that the second pawl member moves in the second guide groove and is restricted in its movement direction by the third limiting plate and the fourth limiting plate. Moreover, the second pawl member cooperates with the second limiting groove via a second ridge, thereby improving the stability of the second pawl member moving in the second guide groove and further restricting its movement direction. The third limiting plate is disposed opposite to the first limiting plate, and the fourth limiting plate is disposed opposite to the second limiting plate. This allows the first pawl member and the second pawl member to move independently in the radial direction of the support shaft after being squeezed in different directions without interfering with each other, thereby further achieving bidirectional locking of the ratchet self-locking device.

[0035] 9. The support frame adopts a connector and two side plates, which can form a first fixed position and a second fixed position respectively, and are used to fix the first limit plate and the second limit plate, as well as the third limit plate and the fourth limit plate respectively. Moreover, the connector and the side plates are provided with fixing holes for the axle pin to pass through, so that the support frame is fixed on the support shaft, and the connector is provided with an axial hole for the support shaft to pass through, so that the support frame is sleeved on the support shaft. This arrangement makes the structure of the ratchet mechanism more compact and facilitates the installation and disassembly of the ratchet mechanism.

[0036] 10. The use of a lock disc seat can fix the ratchet self-locking device on the side wall of the mechanical equipment, and a nut is used to limit the movement of the gear on the axis of the support shaft, thereby improving the stability of the gear rotation. A gasket is used to reduce the pressure on the nut when the gear rotates, thereby improving the structural stability of the ratchet self-locking device. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] Figure 1 This is a schematic diagram of the structure of the ratchet self-locking device in one embodiment of the present invention. Figure 1 .

[0038] Figure 2 1 is an exploded view of the structure of a ratchet self-locking device in one embodiment of the present invention.

[0039] Figure 3 This is a schematic diagram of the structure of the ratchet self-locking device in one embodiment of the present invention. Figure 2 .

[0040] Figure 4 This is a schematic diagram of the structure of the ratchet self-locking device in one embodiment of the present invention. Figure 3 .

[0041] Figure 5 This is a schematic diagram of the structure of the ratchet self-locking device in one embodiment of the present invention. Figure 4 .

[0042] Figure 6 It is a structural front view of the first claw plate component and the first pawl component in one embodiment of the present invention.

[0043] Figure 7 In one embodiment of the present invention Figure 6 A partial enlarged view of point A.

[0044] Figure 8 It is a structural front view of the second claw plate component and the second pawl component in one embodiment of the present invention.

[0045] Figure 9 In one embodiment of the present invention Figure 8 A partial enlarged view of point B.

[0046] Figure 10 It is a structural schematic diagram of a pawl seat in one embodiment of the present invention.

[0047] Figure 11 2 is a schematic structural diagram of a support frame in one embodiment of the present invention.

[0048] Figure 12 2 is a schematic structural diagram of the first pawl member in one embodiment of the present invention.

[0049] Figure 13 2 is a schematic structural diagram of the second pawl member in one embodiment of the present invention.

[0050] Description of reference numerals:

[0051] 100. Ratchet self-locking device; 1. Frame; 11. Mounting hole; 2. Gear; 3. Ratchet mechanism; 31. First pawl disc; 311. First groove; 32. Second pawl disc; 321. Second groove; 33. Pawl disc sleeve; 34. Connecting column; 4. Support shaft; 51. First pawl member; 511. First pawl body; 512. First stopper; 513. First inclined surface; 514. First ridge; 515. First hook; 5150. First barb; 516. First active position; 52. Second pawl member; 520. Mounting cavity; 521. Second pawl body; 522. Second stopper; 523. Second inclined surface; 524. Second ridge; 525. Second hook; 5250. First Two barbs; 526, second movable position; 53, pawl seat; 530, mounting plate; 531, first limiting plate; 532, second limiting plate; 533, first guide groove; 534, first elastic member; 535, first limiting groove; 536, third limiting plate; 537, fourth limiting plate; 538, second guide groove; 539, second elastic member; 501, second limiting groove; 54, support frame; 541, connector; 542, side plate; 543, first fixed position; 544, second fixed position; 545, fixing hole; 546, shaft pin; 547, shaft hole; 55, first gear pin; 56, second gear pin; 6, lock disk seat; 61, shaft sleeve; 62, nut; 63, gasket. DETAILED DESCRIPTION

[0052] To facilitate understanding of the present invention, specific embodiments of the present invention will be described in more detail below with reference to the accompanying drawings.

[0053] Unless otherwise specified or defined, the "first, second..." used in this article is only used to distinguish names and does not represent a specific quantity or order.

[0054] Unless stated otherwise or defined otherwise, the term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0055] It should be noted that, in this document, “fixed to” or “connected to” may mean directly fixing or connecting to an element, or indirectly fixing or connecting to an element.

[0056] like Figures 1 to 10As shown, a ratchet self-locking device 100 includes a transmission mechanism and a ratchet mechanism 3, the transmission mechanism includes a frame 1, a gear 2 and a support shaft 4, the gear 2 is sleeved on the outside of the support shaft 4 and rotatably cooperates with the first end of the support shaft 4, and the second end of the support shaft 4 rotatably cooperates with the frame 1; the ratchet mechanism 3 includes a first pawl plate member 31, a first pawl member 51, a first elastic member 534 and a first gear pin 55, the side wall of the first pawl plate member 31 is installed on the frame 1, the inner wall of the first pawl plate member 31 cooperates with the first end of the first pawl member 51, and is used to lock the first pawl member 51 to rotate in the first direction; the second end of the first pawl member 51 is connected to the first end of the first elastic member 534, and the second end of the first elastic member 534 is installed on the support shaft 4; wherein, the first pawl member 51 has a first inclined surface 513 tangent to the outer wall of the first gear pin 55, the first end of the first gear pin 55 is installed on the side wall of the gear 2, and the second end of the first gear pin 55 is used to abut against the first inclined surface 513. By sleeved on the outside of the support shaft 4, the gear 2 can be used as an idler gear. When the gear 2 is not driven by an external force, the first claw plate 31 cooperates with the first pawl member 51, and the first gear pin 55 abuts against the first inclined surface 513 of the first pawl member 51, so that the first claw plate 31 and the first pawl member 51 are locked. The first pawl member 51 restricts the rotation of the first gear pin 55, thereby locking the gear 2; when locking the first direction of the gear 2, it is only necessary to align the groove of the first claw plate 31 and the hook of the first pawl member 51 in the forward or reverse direction. The first direction can be clockwise or counterclockwise; if the gear 2 needs to rotate, a force is applied to the gear 2 so that it passes through the first gear in the circumferential direction. The pin 55 squeezes the first pawl member 51. Since the outer wall of the first gear pin 55 is tangent to the first inclined surface 513 of the first pawl member 51, the first pawl member 51 is squeezed and compresses the first elastic member 534, so that the first pawl member 51 moves radially along the support shaft 4 through the first elastic member 534. When the force acting on the driving gear 2 is greater than the elastic force of the first elastic member 534, the first pawl member 51 moves a certain distance, so that the first pawl member 51 is separated from the first claw plate member 31, and the gear 2 rotates normally, realizing the locking of the transmission device, and it is more practical. To lock or rotate the gear 2, it is only necessary to set the torque of the gear 2 and the elastic force of the first elastic member 534, without the need to disassemble or install the ratchet mechanism 3.

[0057] like Figures 1 to 10As shown, the ratchet mechanism 3 also includes a second pawl plate member 32, a second pawl member 52, a second elastic member 539, and a second gear pin 56. The side wall of the second pawl plate member 32 is installed on the frame 1, and the inner wall of the second pawl plate member 32 cooperates with the first end of the second pawl member 52 and is used to lock the second pawl member 52 to rotate in the second direction, and the first direction is opposite to the second direction; the second end of the second pawl member 52 is connected to the first end of the second elastic member 539, and the second end of the second elastic member 539 is installed on the support shaft 4, and the first elastic member 534 is arranged opposite to the second elastic member 539; the first gear pin 55 and the second gear pin 56 are arranged opposite to each other, and the first gear pin 55 or the second gear pin 56 is parallel to the axis of the gear 2; the second pawl member 52 has a second inclined surface 523 tangent to the outer wall of the second gear pin 56, and the first end of the second gear pin 56 is installed on the side wall of the gear 2, and the second end of the second gear pin 56 is used to abut against the second inclined surface 523. When gear 2 is not driven by external force, the second claw plate member 32 cooperates with the second pawl member 52, and the second gear pin 56 abuts against the second inclined surface 523 of the second pawl member 52, so that after the second claw plate member 32 and the second pawl member 52 are locked, the second pawl member 52 restricts the rotation of the second gear pin 56, thereby locking gear 2; when locking the second direction of gear 2, it is only necessary to make the groove of the second claw plate member 32 and the hook of the second pawl member 52 correspond in the forward or reverse direction, the first direction is opposite to the second direction, when the first direction is counterclockwise, the second direction is clockwise; if gear 2 needs to rotate, a force is applied to gear 2 so that it squeezes the second pawl member 52 in the circumferential direction through the second gear pin 56. Since the outer wall of the second gear pin 56 is tangent to the second inclined surface 523 of the second pawl member 52, the second pawl member 5 2 is squeezed and the second elastic member 539 is compressed, so that the second pawl member 52 moves radially along the support shaft 4 through the second elastic member 539. When the force acting on the driving gear 2 is greater than the elastic force of the second elastic member 539, the second pawl member 52 moves a certain distance, so that the second pawl member 52 is separated from the second claw plate member 32, and the gear 2 rotates normally. Moreover, when the gear 2 rotates in the forward direction, a first elastic member 534 is provided between the first pawl member 51 and the support shaft 4, so that the first pawl member 51 is squeezed by the first claw plate member 31 under the driving force and moves toward the radial direction of the support shaft 4, so that the first claw plate member 31 will not lock the first pawl member 51 to rotate in the clockwise direction; similarly, the second claw plate member 32 will not lock the second pawl member 52 to rotate in the counterclockwise direction. With this arrangement, the transmission device can be locked in both counterclockwise and clockwise directions.

[0058] The locking principle of the ratchet self-locking device 100 is as follows: when the gear 2 has no driving force to rotate, the gear 2 is in a stationary state, the first gear pin 55 is in the first active position 516, the first hook 515 is subjected to the elastic force of the first elastic member 534, extends into the first groove 311, and abuts against the side wall of the first groove 311, the first claw plate 31 locks the first hook 515 to rotate in the first direction through the first groove 311, thereby limiting the first gear pin 55 from rotating in the counterclockwise direction, thereby locking the gear 2 from rotating in the reverse direction; the second gear The pin 56 is located in the second active position 526, and the second hook 525 is subjected to the elastic force of the second elastic member 539, extends into the second groove 321, and abuts against the side wall of the second groove 321. The second claw plate 32 locks the second hook 525 to rotate in the second direction through the second groove 321, thereby limiting the second gear pin 56 to rotate in the clockwise direction. The first gear pin 55 and the second gear pin 56 are both fixed to the side wall of the gear 2, thereby limiting the gear 2 to rotate in the clockwise or counterclockwise direction, realizing two-way locking of the ratchet self-locking device 100.

[0059] The operating principle of the ratchet self-locking device 100 is as follows: when the gear 2 is driven by the motor or acts as an idler gear, so that it has a reverse driving force, and when the driving force is greater than the elastic force of the first elastic member 534 and the second elastic member 539, the gear 2 presses the first inclined surface 513 through the first gear pin 55, thereby driving the first hook 515 to move radially toward the support shaft 4 and away from the first groove 311. After the first hook 515 moves a certain distance, it separates from the first claw plate 31, thereby opening the reverse switch of the ratchet mechanism 3. Without disassembling the ratchet mechanism 3, the gear 2 rotates counterclockwise; similarly, when the gear 2 has a forward driving force, the gear 2 rotates clockwise, and the gear 2 squeezes the second inclined surface 523 through the second gear pin 56, thereby driving the second hook 525 to move radially toward the support shaft 4 and away from the second groove 321. After the second hook 525 moves a certain distance, it separates from the second claw disk 32, thereby opening the forward switch of the ratchet mechanism 3. Without disassembling the ratchet mechanism 3, the gear 2 rotates clockwise.

[0060] In reality, in some mechanical equipment that does not require high transmission efficiency or is used less frequently, in order to save energy, the ratchet self-locking device 100 can be used to achieve bidirectional locking, making the transmission device save money, save labor, be simple, reliable and safe.

[0061] like Figure 2 、 Figure 3 and Figure 12As shown, the first pawl member 51 includes a first pawl body 511, a first hook 515 and a first stopper 512. The first stopper 512 and the first hook 515 are both installed on the side wall of the first pawl body 511. A first active position 516 is formed between the first stopper 512 and the first hook 515. The second end of the first gear pin 55 is located in the first active position 516. The cross-section of the first stopper 512 is triangular. The first inclined surface 513 is located on the hypotenuse of the first stopper 512 and faces the first active position 516. The first pawl body 511 has an installation cavity 520 for accommodating a first elastic member 534. The length direction of the installation cavity 520 intersects with the axial center line of the support shaft 4. The first hook 515 is retractable in the radial direction of the support shaft 4 through the first elastic member 534. The first stopper 512 is provided with a triangular cross section, so that the first stopper 512 has a first inclined surface 513 that abuts against the first gear pin 55, and a first movable position 516 is formed between the first hook 515 and the first stopper 512. The first gear pin 55 extends into the first movable position 516. When the first gear pin 55 is rotated by the gear 2, the first inclined surface 513 is squeezed. Since the first claw body 511 has a mounting cavity 520 for accommodating the first elastic member 534, the first hook 515 has a moving path in the radial direction of the support shaft 4 through the first elastic member 534. After the first stopper 512 is squeezed, the first hook 515 moves toward the radial direction of the support shaft 4, thereby moving the first hook 515 away from the inner wall of the first claw disk 31. The first hook 515 is separated from the first claw disk 31 and the switch of the ratchet mechanism 3 in the first direction is opened, which does not affect the counterclockwise rotation of the gear 2, further realizing that the gear 2 can be freely switched to open or lock without disassembling or installing the ratchet mechanism 3.

[0062] like Figure 6 and Figure 7As shown, the end of the first hook 515 is provided with a plurality of first barbs 5150; the first claw plate 31 is provided with a plurality of first grooves 311, and the plurality of first barbs 5150 correspond one-to-one to the plurality of first grooves 311, and the first grooves 311 match the shape of the end of the first hook 515, and the side wall of any first groove 311 abuts against the outer wall of any first barb 5150, and the bottom of the first groove 311 contacts the oblique side of the first barb 5150, and the first barb 5150 is used to abut against the first groove 311 in the first direction. The first barb 5150 is matched with the first groove 311, and the first barb 5150 is used to abut against the first groove 311 in the first direction, so that the first groove 311 locks the first barb 5150 to rotate in the counterclockwise direction, and the bottom of the first groove 311 contacts the hypotenuse of the first barb 5150, so that when the first barb 5150 rotates in the second direction, the bottom of the first groove 311 is subjected to the force of the first barb 5150, and a reverse force is applied to the first barb 5150, and the first barb 5150 is squeezed, so that the first barb 5150 moves radially toward the support shaft 4 through the first elastic member 534, thereby not affecting the rotation of the first barb 5150 in the second direction, further improving the flexibility of the ratchet self-locking device 100.

[0063] like Figure 2 、 Figure 3 and Figure 13 As shown, the second pawl member 52 includes a second pawl body 521, a second hook 525 and a second stopper 522. The second stopper 522 and the second hook 525 are both installed on the side wall of the second pawl body 521. A second active position 526 is formed between the second stopper 522 and the second hook 525. The second end of the second gear pin 56 is located in the second active position 526. The cross-section of the second stopper 522 is triangular. The second inclined surface 523 is located on the hypotenuse of the second stopper 522 and faces the second active position 526. The second hook 525 is retractable in the radial direction of the support shaft 4 through the second elastic member 539. The second stopper 522 is triangular in cross section, so that the second stopper 522 has a second inclined surface 523 that abuts against the second gear pin 56, and a second active position 526 is formed between the second hook 525 and the second stopper 522. The second gear pin 56 extends into the second active position 526. When the second gear pin 56 is rotated by the gear 2, the second inclined surface 523 is squeezed. Since the second hook 525 has a moving path in the radial direction of the support shaft 4 through the second elastic member 539, the second hook 525 is squeezed and moves the second stopper 522 in the radial direction of the support shaft 4, thereby causing the second hook 525 to move away from the inner wall of the second claw disk 32. The second hook 525 is separated from the second claw disk 32, and the switch of the ratchet mechanism 3 in the second direction is opened, which does not affect the clockwise rotation of the gear 2, further realizing that the gear 2 can be freely switched to open or lock without disassembling or installing the ratchet mechanism 3.

[0064] like Figure 8 and Figure 9 As shown, a second barb 5250 is provided at the end of the second hook 525; the second claw plate 32 is provided with a second groove 321, the second groove 321 is matched with the end shape of the second hook 525, and the second barb 5250 is used to abut with the second groove 321 in the second direction; the hypotenuse of the first groove 311 and the hypotenuse of the second groove 321 are arranged in opposite directions; the first barb 5150 and the second barb 5250 are staggered in the axial direction of the support shaft 4; and / or; the first groove 311 and the second groove 321 are staggered in the axial direction of the support shaft 4. The second barb 5250 is matched with the second groove 321, and the second barb 5250 is used to abut with the second groove 321 in the second direction, so that the second groove 321 locks the second barb 5250 to rotate in the counterclockwise direction; the hypotenuses of the first groove 311 and the second groove 321 are arranged in opposite directions, so that the first groove 311 can lock the first barb 5150 to rotate in the first direction, and the second groove 321 locks the second barb 5250 to rotate in the second direction; moreover, the first barb 5150 and the second barb 5250 are staggered in the axial centerline direction of the support shaft 4, the first barb 5150 cooperates with the first groove 311, and the second barb 5250 cooperates with the second groove 321, and the two respectively lock the first direction and the second direction of the gear 2, and the two are opposed to each other and do not interfere with each other, thereby realizing bidirectional locking of the ratchet self-locking device 100.

[0065] like Figure 2 and Figure 10 As shown, the ratchet mechanism 3 also includes a pawl seat 53 and a pawl disc sleeve 33. The pawl disc sleeve 33 is sleeved on the outside of the first pawl disc member 31 and the outside of the second pawl disc member 32. The pawl disc sleeve 33 is provided with a connecting column 34. The side wall of the frame 1 is provided with a mounting hole 11 that cooperates with the connecting column 34, so that the side wall of the pawl disc sleeve 33 is fixed to the side wall of the frame 1; the pawl seat 53 is sleeved on the outside of the support shaft 4 and is located in the pawl disc sleeve 33. The pawl seat 53 is provided with a first guide groove 533. The first guide groove 533 extends along the moving direction of the first pawl member 51, and the first pawl member 51 is located in the first guide groove 533. The first claw plate member 31 and the second claw plate member 32 are fixed to the side wall of the frame 1 through the claw plate sleeve 33, so that the first claw plate member 31 and the second claw plate member 32 lock the first pawl member 51 and the second pawl member 52 respectively; and the first pawl member 51 is embedded in the pawl seat 53, so that the first pawl member 51 can move in the first guide groove 533, thereby improving the stability of the cooperation between the first pawl member 51 and the first claw plate member 31.

[0066] like Figure 10As shown, the pawl seat 53 includes a mounting plate 530, a first limiting plate 531 and a second limiting plate 532. The mounting plate 530 has a through hole for the support shaft 4 to pass through. The first limiting plate 531 and the second limiting plate 532 are both mounted on the mounting plate 530, and the first limiting plate 531 is parallel to the second limiting plate 532. A first guide groove 533 is formed between the first limiting plate 531 and the second limiting plate 532. A first limiting groove 535 is provided on the inner side of the first limiting plate 531 and the second limiting plate 532. The first limiting groove 535 extends along the moving direction of the first pawl member 51. The first limiting groove 535 is provided on the inner side of the first limiting plate 531 and the second limiting plate 532. The side wall of the first pawl member 51 is connected to the first guide groove 533 and is provided with a first ridge 514 that cooperates with the first limiting groove 535; the first guide groove 533 is formed between the first limiting plate 531 and the second limiting plate 532, so that the first pawl member 51 can move in the first guide groove 533 and its movement direction is limited by the first limiting plate 531 and the second limiting plate 532. Moreover, the first pawl member 51 cooperates with the first limiting groove 535 through the first ridge 514, thereby improving the stability of the first pawl member 51 moving in the first guide groove 533 and further limiting the movement direction of the first pawl member 51.

[0067] like Figure 10 As shown, the pawl seat 53 also includes a third limit plate 536 and a fourth limit plate 537, and the third limit plate 536 and the fourth limit plate 537 are both installed on the mounting plate 530, and the third limit plate 536 is arranged opposite to the first limit plate 531, and the fourth limit plate 537 is arranged opposite to the second limit plate 532; a second guide groove 538 is formed between the third limit plate 536 and the fourth limit plate 537, and the second pawl member 52 is located in the second guide groove 538; a second limit groove 501 is provided on the inner side of the third limit plate 536 and the fourth limit plate 537, and the second limit groove 501 extends along the moving direction of the second pawl member 52, and the second limit groove 501 is communicated with the second guide groove 538, and the side wall of the second pawl member 52 is provided with a second ridge 524 that cooperates with the second limit groove 501. The second guide groove 538 is formed between the third limiting plate 536 and the fourth limiting plate 537, so that the second pawl member 52 can move in the second guide groove 538 and its movement direction is limited by the third limiting plate 536 and the fourth limiting plate 537. Moreover, the second pawl member 52 cooperates with the second limiting groove 501 through the second ridge 524, thereby improving the stability of the second pawl member 52 moving in the second guide groove 538 and further limiting the movement direction of the second pawl member 52; wherein the third limiting plate 536 is arranged opposite to the first limiting plate 531, and the fourth limiting plate 537 is arranged opposite to the second limiting plate 532; so that after the first pawl member 51 and the second pawl member 52 are squeezed in different directions, they can move radially toward the support shaft 4 separately without interfering with each other, thereby further realizing the bidirectional locking of the ratchet self-locking device 100.

[0068] like Figure 11As shown, the pawl seat 53 is also provided with a support frame 54, which is fixed to the side wall of the mounting plate 530; the support frame 54 includes an axle pin 546, a connecting body 541 and two side plates 542, the two side plates 542 are installed on both sides of the connecting body 541, the connecting body 541 is located in the middle of the side plates 542, and a first fixed position 543 and a second fixed position 544 are formed between the two side plates 542 and the connecting body 541, the first limit plate 531 and the second limit plate 532 are located in the first fixed position 543, and the third limit plate 536 and the fourth limit plate 537 are located in the second fixed position 544; the connecting body 541 is provided with an axle hole 547 for the support shaft 4 to pass through, and the connecting body 541 and the side plates 542 are both provided with a fixing hole 545 for the axle pin 546 to pass through, so that the support frame 54 is key-connected to the support shaft 4 through the axle pin 546, and the fixing hole 545 intersects with the axle hole 547. The support frame 54 adopts a connecting body 541 and two side plates 542, which can form a first fixed position 543 and a second fixed position 544 respectively, and are respectively used to fix the first limit plate 531 and the second limit plate 532, as well as the third limit plate 536 and the fourth limit plate 537. Moreover, a fixing hole 545 for the axle pin 546 to pass through is provided in the connecting body 541 and the side plate 542, so that the support frame 54 is fixed on the support shaft 4, and the connecting body 541 is provided with an axle hole 547 for the support shaft 4 to pass through, so that the support frame 54 is sleeved on the support shaft 4. Such an arrangement makes the structure of the ratchet mechanism 3 more compact and facilitates the installation and disassembly of the ratchet mechanism 3.

[0069] like Figure 2 As shown, the ratchet self-locking device 100 also includes a lock disc seat 6, a sleeve 61, a nut 62, and a washer 63. The first end of the sleeve 61 is mounted on the side wall of the lock disc seat 6, and the second end of the sleeve 61 is sleeved on the second end of the support shaft 4; the washer 63 is sleeved on the outside of the support shaft 4, and the nut 62 is threadedly connected to the first end of the support shaft 4. The washer 63 is located between the gear 2 and the nut 62. The use of the lock disc seat 6 can fix the ratchet self-locking device 100 on the side wall of the mechanical equipment, and the use of the nut 62 to limit the movement of the gear 2 on the axis of the support shaft 4, thereby improving the rotational stability of the gear 2. The use of the washer 63 reduces the pressure on the nut 62 when the gear 2 rotates, thereby improving the stability of the ratchet self-locking device 100.

[0070] The above embodiments are not exhaustive and may include many other embodiments not listed above. Any replacements and improvements made without violating the concept of the present invention are within the scope of protection of the present invention.

Claims

1. Ratchet self-locking device, characterized in that: include: A transmission mechanism and a ratchet mechanism, wherein the transmission mechanism includes a frame, a gear and a support shaft, wherein the gear is sleeved on the outside of the support shaft and rotates with the first end of the support shaft, and the second end of the support shaft rotates with the frame; The ratchet mechanism includes a first pawl disc member, a first pawl member, a first elastic member and a first gear pin, wherein the side wall of the first pawl disc member is mounted on the frame, the inner wall of the first pawl disc member cooperates with the first end of the first pawl member and is used to lock the first pawl member from rotating in a first direction; the second end of the first pawl member is connected to the first end of the first elastic member, and the second end of the first elastic member is mounted on the support shaft; wherein the first pawl member has a first inclined surface tangent to the outer wall of the first gear pin, the first end of the first gear pin is mounted on the side wall of the gear, and the second end of the first gear pin is used to abut against the first inclined surface; The ratchet mechanism further includes a second pawl disc, a second pawl member, a second elastic member, and a second gear pin, wherein a side wall of the second pawl disc is mounted on the frame, an inner wall of the second pawl disc cooperates with a first end of the second pawl member and is used to lock the second pawl member from rotating in a second direction, wherein the first direction is opposite to the second direction; a second end of the second pawl member is connected to a first end of the second elastic member, a second end of the second elastic member is mounted on the support shaft, and the first elastic member and the second elastic member are arranged opposite to each other; The first gear pin and the second gear pin are arranged opposite to each other, and the first gear pin or the second gear pin is parallel to the axis of the gear; the second pawl has a second inclined surface tangent to the outer wall of the second gear pin, the first end of the second gear pin is mounted on the side wall of the gear, and the second end of the second gear pin is used to abut against the second inclined surface; The ratchet mechanism further includes a claw disc sleeve, the claw disc sleeve is sleeved on the outside of the first claw disc member and the outside of the second claw disc member, and the side wall of the claw disc sleeve is fixed to the side wall of the frame; The ratchet self-locking device further comprises a lock disc seat and a shaft sleeve, wherein the first end of the shaft sleeve is mounted on the side wall of the lock disc seat, and the second end of the shaft sleeve is sleeved on the second end of the support shaft.

2. The ratchet self-locking device according to claim 1, characterized in that: The first pawl member includes a first pawl body, a first hook and a first stopper, wherein the first stopper and the first hook are both mounted on a side wall of the first pawl body, a first active position is formed between the first stopper and the first hook, and the second end of the first gear pin is located in the first active position; The cross-section of the first stop block is triangular, the first inclined surface is located on the hypotenuse of the first stop block and faces the first active position; the first claw body has a mounting cavity for accommodating the first elastic member, the length direction of the mounting cavity intersects with the axial center line of the support shaft, and the first hook is retractable in the radial direction of the support shaft through the first elastic member.

3. The ratchet self-locking device according to claim 2, characterized in that: The end of the first hook is provided with a first hook; the first claw plate is provided with a first groove, the first groove matches the shape of the end of the first hook, the side wall of the first groove abuts against the outer wall of the first hook, the bottom of the first groove contacts the oblique side of the first hook, and the first hook is used to abut against the first groove in the first direction.

4. The ratchet self-locking device according to claim 3, characterized in that: The second pawl member includes a second pawl body, a second hook and a second stopper, wherein the second stopper and the second hook are both mounted on a side wall of the second pawl body, a second active position is formed between the second stopper and the second hook, and the second end of the second gear pin is located in the second active position; The cross section of the second stopper is triangular in shape. The second inclined surface is located on the oblique side of the second stopper and faces the second active position. The second hook is retractable in the radial direction of the support shaft through the second elastic member.

5. The ratchet self-locking device according to claim 4, characterized in that: The end of the second hook is provided with a second barb; the second claw plate is provided with a second groove, the second groove matches the shape of the end of the second hook, and the second barb is used to abut against the second groove in the second direction; The oblique side of the first groove and the oblique side of the second groove are arranged in opposite directions; The first barb and the second barb are staggered in the direction of the axis of the support shaft; and / or the first groove and the second groove are staggered in the direction of the axis of the support shaft.

6. The ratchet self-locking device according to any one of claims 1 to 5, characterized in that: The ratchet mechanism also includes a pawl seat, which is sleeved on the outside of the support shaft and located in the pawl disc sleeve; the pawl seat is provided with a first guide groove, which extends along the moving direction of the first pawl member, and the first pawl member is located in the first guide groove.

7. The ratchet self-locking device according to claim 6, characterized in that: The pawl seat includes a mounting plate, a first limiting plate and a second limiting plate, the mounting plate having a through hole for the support shaft to pass through, the first limiting plate and the second limiting plate are both mounted on the mounting plate, and the first limiting plate is parallel to the second limiting plate; The first guide groove is formed between the first limiting plate and the second limiting plate. The first limiting groove is provided on the inner sides of the first limiting plate and the second limiting plate. The first limiting groove extends along the moving direction of the first pawl member. The first limiting groove communicates with the first guide groove. The side wall of the first pawl member is provided with a first ridge that cooperates with the first limiting groove. The pawl seat further includes a third limiting plate and a fourth limiting plate, both of which are mounted on the mounting plate, and the third limiting plate is arranged opposite to the first limiting plate, and the fourth limiting plate is arranged opposite to the second limiting plate; A second guide groove is formed between the third limiting plate and the fourth limiting plate, and the second pawl member is located in the second guide groove; a second limiting groove is provided on the inner sides of the third limiting plate and the fourth limiting plate, and the second limiting groove extends along the moving direction of the second pawl member. The second limiting groove is communicated with the second guide groove, and the side wall of the second pawl member is provided with a second ridge that cooperates with the second limiting groove.

8. The ratchet self-locking device according to claim 7, characterized in that: The pawl seat is further provided with a support frame, which is fixed to the side wall of the mounting plate; the support frame includes an axle pin, a connector and two side plates, the two side plates are installed on both sides of the connector, the connector is located in the middle of the side plates, and a first fixed position and a second fixed position are formed between the two side plates and the connector, the first limiting plate and the second limiting plate are located in the first fixed position, and the third limiting plate and the fourth limiting plate are located in the second fixed position; The connecting body is provided with an axial hole for the support shaft to pass through, and the connecting body and the side plate are both provided with fixing holes for the axial pin to pass through, so that the support frame is connected to the support shaft through the axial pin, and the fixing hole intersects with the axial hole.

9. The ratchet self-locking device according to any one of claims 1 to 5, characterized in that: The ratchet self-locking device further comprises a nut and a washer, wherein the washer is sleeved on the outside of the support shaft, the nut is threadedly connected to the first end of the support shaft, and the washer is located between the gear and the nut.

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