A pawl assembly and a rotating shaft linkage mechanism

Abstract

The present application relates to a kind of pawl assembly and pivot linkage mechanism, belong to rotating mechanism design field;Pivot passes through the circular through-hole in the middle of rotating wheel, base, ratchet;Rotating wheel key and ratchet key corresponding groove are opened on pivot;Rotating wheel and ratchet are connected with pivot by rotating wheel key and ratchet key respectively, and rotate with pivot;Pawl shaft passes through the middle through-hole of pawl, base, torsion spring, lever;Pawl is connected with pawl shaft by cutting edge and notch, so that pawl rotates with pawl shaft;Lever and pawl shaft are connected by cutting edge and notch, and lever is fixed with pawl shaft by screw, and lever rotates with pawl shaft;Torsion spring is connected with lever and base by upper and lower outer arm;Handle and key are fixed on lever by thread;The present application does not need motor drive mechanism and other exogenous control mechanism, can realize the bidirectional rotation, unidirectional rotation of pivot in different period and mutual switching, with small size, switching flexible, long space life, easy to use, low price and other characteristics.

Description

Technical Field

[0001] This invention belongs to the field of rotating mechanism design, and relates to a pawl assembly and a rotating shaft linkage mechanism; Background Technology

[0002] With the rapid development of my country's aerospace industry, spacecraft functions are constantly increasing, and mechanisms are becoming more and more diversified. In the field of mechanisms, rotating mechanisms are widely used. As space missions become more in-depth and functions are continuously improved, the control requirements for rotating devices are also becoming increasingly stringent.

[0003] Currently, electric motors are commonly used to control the forward, reverse, and locking functions of rotating mechanisms. Electric motors offer inherent advantages in controlling rotating mechanisms, including flexible switching between forward and reverse rotation, controllable rotation speed, and controllable driving torque. However, active motor drives require specialized control and power supply systems, resulting in complex rotating mechanism structures, high manufacturing and maintenance costs, and limited lifespan due to the influence of thermal environment and radiation in the space environment. Summary of the Invention

[0004] The technical problem solved by this invention is to overcome the shortcomings of the prior art and propose a pawl assembly and a rotating shaft linkage mechanism. It adopts a purely mechanical design. After the initial state is set, it does not require external control mechanisms such as motor drive mechanisms. It can realize bidirectional rotation and unidirectional rotation of the rotating shaft at different time periods and switch between them. It has the characteristics of small size, flexible switching, long service life, convenient use and low price.

[0005] The solution of the present invention is:

[0006] A pawl assembly and a rotating shaft linkage mechanism include a rotating shaft assembly, a pawl assembly, and a base; wherein the rotating shaft assembly includes a rotating shaft, a rotating wheel, a ratchet, a rotating wheel key, and a ratchet key; the pawl assembly includes a pawl shaft, a pawl, a torsion spring, a lever, a locking pin, a handle, and a screw;

[0007] The rotating shaft passes through a circular through-hole between the rotating wheel, the base, and the ratchet, connecting the three in series. The rotating shaft has grooves corresponding to the rotating wheel key and the ratchet key. The rotating wheel is connected to the rotating shaft via the rotating wheel key, and the ratchet is connected to the rotating shaft via the ratchet key, rotating with the rotating shaft. The pawl shaft passes through a through-hole between the pawl, the base, the torsion spring, and the lever, connecting the four in series. The pawl and the pawl shaft are connected by a cut edge and a notch, allowing the pawl to rotate with the pawl shaft. The lever and the pawl shaft are connected by a cut edge and a notch, and the lever is fixed to the pawl shaft with screws, allowing the lever to rotate with the pawl shaft. The torsion spring is connected to the lever and the base via upper and lower outer supports. The handle and the locking pin are both threaded onto the lever.

[0008] In the aforementioned ratchet assembly and rotating shaft linkage mechanism, the working process of the linkage mechanism is as follows:

[0009] In the initial state, set the relative positions of the lever and the pawl, adjust the torsion angle of the torsion spring so that the pawl engages with the ratchet, and the locking pin is not in the wheel. In this state, the shaft assembly can only rotate counterclockwise.

[0010] Manually turn the handle clockwise to disengage the pawl from the ratchet teeth; maintain the force to keep the locking pin in contact with the outer side of the upper arc-shaped retaining ring of the wheel; rotate the shaft assembly clockwise until the locking pin is in the notch of the arc-shaped retaining ring of the wheel, at which point the locking pin screws into the inner side of the arc-shaped retaining ring of the wheel; remove the manual force, and the pawl assembly rotates counterclockwise under the torque of the torsion spring, stopping when the locking pin contacts the inner wall of the arc-shaped retaining ring of the wheel; in this state, the pawl disengages from the ratchet teeth, and the shaft assembly achieves bidirectional rotation, with the bidirectional rotation range extending from the notch of the arc-shaped retaining ring of the wheel to the straight edge retaining ring;

[0011] Continue rotating the wheel assembly clockwise. When the straight edge retaining ring of the wheel contacts the locking pin, the shaft assembly stops rotating due to the locking pin's obstruction. In this state, the shaft assembly can only rotate counterclockwise. As the shaft assembly rotates counterclockwise, when the locking pin is in the notch of the wheel's arc-shaped retaining ring, the locking pin rotates out of the wheel's arc-shaped retaining ring under the torque of the torsion spring. The pawl assembly continues to rotate counterclockwise under the torque of the torsion spring, and the pawl teeth mesh with the ratchet teeth, returning to the initial state.

[0012] In the aforementioned pawl assembly and shaft linkage mechanism, a countersunk hexagonal inner hole is provided at the upper end of the shaft for controlling the rotation of the shaft; a keyway is provided on the shaft body; a keyway is provided on the central circular hole of the wheel, and the circumferential connection between the shaft and the wheel is achieved through the cooperation of the wheel key and the shaft; a keyway is provided on the central circular hole of the ratchet, and the circumferential connection between the shaft and the ratchet is achieved through the cooperation of the ratchet key and the shaft.

[0013] In the aforementioned pawl assembly and shaft linkage mechanism, the rotating wheel is provided with an arc-shaped retaining ring and a straight-edge retaining ring. The arc-shaped retaining ring has a notch to control the rotation of the locking pin. The straight-edge retaining ring and the locking pin cooperate to limit the rotation range of the rotating wheel. When the locking pin rotates out of the arc-shaped retaining ring, the straight-edge retaining ring fits against the locking pin, limiting the rotating wheel from continuing to rotate. The locking pin rotates out of the notch under the action of the torsion spring.

[0014] In the aforementioned pawl assembly and rotating shaft linkage mechanism, the pawl shaft, pawl, torsion spring, and lever maintain a certain relative orientation; the pawl shaft and pawl are circumferentially connected through a cut edge and a notch structure, and the pawl shaft and lever are circumferentially connected through a cut edge and a notch structure; the handle and the locking pin are both threadedly fixed to the lever; the upper and lower outer arms of the torsion spring are respectively connected to the lever and the limiting holes on the base.

[0015] In the aforementioned pawl assembly and rotating shaft linkage mechanism, the pawl shaft cut edge is through-through, and the pawl and lever mounting hole cuts are in different positions, thereby fixing the relative positional relationship between the pawl and lever after the pawl assembly is assembled.

[0016] In the aforementioned pawl assembly and rotating shaft linkage mechanism, the pawl shaft tangent extends through the circular shaft section to restrict the circumferential rotation of the pawl and lever, and the end of the pawl shaft has a circular flange to restrict the axial movement of the pawl.

[0017] In one of the above-mentioned pawl assembly and rotating shaft linkage mechanisms, a tangent is provided on the side of the pawl's central hole away from the pawl teeth.

[0018] In the aforementioned pawl assembly and shaft linkage mechanism, a chamfer is provided on the outer side of the middle hole of the lever, and a handle and a locking pin mounting threaded hole are provided on the lever, as well as an outer support arm limiting hole on the torsion spring.

[0019] In the aforementioned pawl assembly and pivot linkage mechanism, the base has a pivot mounting hole in the middle, a pawl shaft mounting hole and a torsion spring lower outer pivot arm limiting hole on the side; and a ratchet mounting hole and a pawl movement arc hole are provided on the inner side of the base.

[0020] The advantages of this invention compared to the prior art are:

[0021] (1) The pawl assembly and the shaft linkage mechanism of the present invention adopt a purely mechanical design. After the initial state is set, it can perform the action without the need for external control mechanisms such as motor drive mechanism.

[0022] (2) The ratchet assembly and the rotating shaft linkage mechanism of the present invention cooperate to control the meshing between the ratchet and the ratchet through the torsion spring, so that the initial stage of rotation is bidirectional. When the ratchet and the ratchet are meshed, the rotating shaft can only rotate in one direction, so that the rotating shaft can switch between the two modes of bidirectional rotation and unidirectional rotation as needed.

[0023] (3) When the rotating shaft is switched to a unidirectional rotation state, after the ratchet and pawl are engaged, the ratchet and pawl can only rotate in one direction under the action of the torsion spring and cannot be disengaged in the opposite direction, thereby realizing the locking of the rotating shaft in the opposite direction and having the function of bearing the reverse torque.

[0024] (4) The pawl assembly and the shaft linkage mechanism of the present invention adopt a pure mechanical structure. All components are made of metal materials that are resistant to space conditions. They have the characteristics of high and low temperature resistance and vacuum resistance, strong space adaptability and long space life. Attached Figure Description

[0025] Figure 1 This is a front view of the pawl assembly and the rotating shaft linkage mechanism of the present invention;

[0026] Figure 2 This is a side view of the pawl assembly and the rotating shaft linkage mechanism of the present invention;

[0027] Figure 3 This is an exploded view of the pawl assembly and the rotating shaft linkage mechanism of the present invention;

[0028] Figure 4 This is a schematic diagram showing the bidirectional rotation of the pawl assembly and the rotating shaft linkage mechanism of the present invention;

[0029] Figure 5 This is a schematic diagram of the pawl assembly and the rotating shaft linkage mechanism of the present invention in their rotational state;

[0030] Figure 6 This is a schematic diagram of the rotary wheel structure of the present invention;

[0031] Figure 7 This is a schematic diagram of the pawl assembly structure of the present invention;

[0032] Figure 8 This is a schematic diagram of the base structure of the present invention. Detailed Implementation

[0033] The present invention will be further described below with reference to the embodiments.

[0034] This invention provides a pawl assembly and a rotating shaft linkage mechanism. It adopts a purely mechanical design. After the initial state is set, no external control mechanism such as a motor drive mechanism is required. It can realize the bidirectional rotation and unidirectional rotation of the rotating shaft at different time periods and switch between them. It has the characteristics of small size, flexible switching, long service life, convenient use and low price.

[0035] Pawl assembly and pivot linkage mechanism, such as Figures 1 to 3 As shown, it specifically includes a rotating shaft assembly 1, a pawl assembly 2, and a base 3; wherein, the rotating shaft assembly 1 includes a rotating shaft 11, a rotating wheel 12, a ratchet 13, a rotating wheel key 14, and a ratchet key 15; the pawl assembly 2 includes a pawl shaft 21, a pawl 22, a torsion spring 23, a lever 24, a locking pin 25, a handle 26, and a screw 27.

[0036] The rotating shaft 11 passes through a circular through-hole between the rotating wheel 12, the base 3, and the ratchet 13, connecting the three in series. The rotating shaft 11 has corresponding grooves for the rotating wheel key 14 and the ratchet key 15. The rotating wheel 12 is connected to the rotating shaft 11 via the rotating wheel key 14, and the ratchet 13 is connected to the rotating shaft 11 via the ratchet key 15, rotating with the rotating shaft 11. The pawl shaft 21 passes through a through-hole between the pawl 22, the base 3, the torsion spring 23, and the lever 24, connecting the rotating wheel 12 and the ratchet 13. The four components are connected in series; the pawl 22 and the pawl shaft 21 are connected by a cut edge and a notch, so that the pawl 22 rotates with the pawl shaft 21; the lever 24 and the pawl shaft 21 are connected by a cut edge and a notch, and the lever 24 is fixed to the pawl shaft 21 by a screw 27, so that the lever 24 rotates with the pawl shaft 21; the torsion spring 23 is connected to the lever 24 and the base 3 through the upper and lower outer support arms; the handle 26 and the locking pin 25 are both fixed to the lever 24 by threads.

[0037] The working process of the linkage mechanism is as follows:

[0038] In the initial state, the relative positions of the lever 24 and the pawl 22 are set, and the torsion angle of the torsion spring 23 is adjusted so that the pawl 22 engages with the ratchet 13 and the locking pin 25 is not inside the rotating wheel 12. In this state, the rotating shaft assembly 1 can only rotate counterclockwise.

[0039] Manually turn handle 26 clockwise to disengage pawl 22 from ratchet 13; maintain pressure to keep pin 25 in contact with the outer side of the upper arc-shaped retaining ring of wheel 12; rotate shaft assembly 1 clockwise until pin 25 is in the notch of the arc-shaped retaining ring of wheel 12, at which point pin 25 screws into the inner side of the arc-shaped retaining ring of wheel 12; remove manual force, and pawl assembly 2 rotates counterclockwise under the torque of torsion spring 23, stopping rotation when pin 25 contacts the inner wall of the arc-shaped retaining ring of wheel 12; in this state, pawl 22 disengages from ratchet 13, and shaft assembly 1 achieves bidirectional rotation, extending from the notch of the arc-shaped retaining ring of wheel 12 to the straight-edge retaining ring, as shown below. Figure 4 As shown.

[0040] like Figure 5 As shown, continue rotating the wheel 12 assembly clockwise. When the straight edge retaining ring of the wheel 12 contacts the locking pin 25, the rotating shaft assembly 1 stops rotating due to the blocking effect of the locking pin 25. In this state, the rotating shaft assembly 1 can only rotate counterclockwise. As the rotating shaft assembly 1 rotates counterclockwise, when the locking pin 25 is in the notch of the arc-shaped retaining ring of the wheel 12, the locking pin 25 rotates out of the arc-shaped retaining ring of the wheel 12 under the torque of the torsion spring 23. The pawl assembly 2 continues to rotate counterclockwise under the torque of the torsion spring 23, and the pawl 22 teeth mesh with the ratchet 13 teeth, returning to the initial state.

[0041] The upper end of the rotating shaft 11 is provided with a countersunk hexagonal socket for controlling the rotation of the rotating shaft 11; a keyway is opened on the shaft body of the rotating shaft 11; a keyway is opened on the central circular hole of the rotating wheel 12, and the rotating shaft 11 and the rotating wheel 12 are circumferentially connected by the rotating wheel key 14; a keyway is opened on the central circular hole of the ratchet 13, and the rotating shaft 11 and the ratchet 13 are circumferentially connected by the ratchet key 15.

[0042] like Figure 6 As shown, the rotating wheel 12 is provided with an arc-shaped retaining ring and a straight-edged retaining ring. The arc-shaped retaining ring has a notch to control the rotation of the locking pin 25. The straight-edged retaining ring and the locking pin 25 cooperate to limit the rotation range of the rotating wheel 12. When the locking pin 25 rotates out of the arc-shaped retaining ring, the straight-edged retaining ring is in contact with the locking pin 25, limiting the rotating wheel 12 from continuing to rotate. The locking pin 25 rotates out of the notch under the action of the torsion spring 23.

[0043] like Figure 7As shown, the pawl shaft 21, pawl 22, torsion spring 23, and lever 24 maintain a certain relative orientation; the pawl shaft 21 and pawl 22 are circumferentially connected through a cut-edge and cut-out structure, and the pawl shaft 21 and lever 24 are circumferentially connected through a cut-edge and cut-out structure; the handle 26 and the locking pin 25 are both threadedly fixed to the lever 24; the upper and lower outer arms of the torsion spring 23 are respectively connected to the lever 24 and the limiting hole on the base 3.

[0044] The pawl shaft 21 has a through-cut edge, and the mounting holes for the pawl 22 and lever 24 are in different positions, ensuring that the relative positions of the pawl 22 and lever 24 are fixed after the pawl assembly 2 is assembled. The pawl shaft 21 has a through-cut edge that restricts the circumferential rotation of the pawl 22 and lever 24, and a circular flange at the end of the pawl shaft 21 restricts the axial movement of the pawl 22. A cut edge is provided on the side of the middle hole of the pawl 22 away from the teeth of the pawl 22. A cut edge is provided on the outer side of the middle hole of the lever 24. A handle 26 and a locking pin 25 are provided on the lever 24 for mounting threaded holes, and an outer support arm limiting hole is provided on the lever 24 for the torsion spring 23.

[0045] like Figure 8 As shown, the base 3 has a rotating shaft 11 mounting hole in the middle, a pawl shaft 21 mounting hole and a torsion spring 23 lower outer rotating arm limiting hole on the side; the base 3 has a ratchet 13 mounting hole and a pawl 22 movement arc hole on the inner side.

[0046] The installation process of the pawl assembly and the rotating shaft linkage mechanism is divided into two steps: installation of rotating shaft assembly 1 and installation of pawl assembly 2.

[0047] Assembly of the rotating shaft assembly 1: The rotating key 14 is embedded in the rotating key 14 groove of the rotating shaft 11, and the rotating key 14 on the rotating shaft 11 is aligned with the rotating key 14 groove and passes through the middle hole of the rotating wheel 12 from top to bottom; the fixed base 3 is fixed, and the combination of the rotating shaft 11 and the rotating wheel 12 passes through the middle hole of the base 3 from top to bottom; the ratchet key 15 is embedded in the ratchet key 15 groove of the rotating shaft 11, and the ratchet key 15 groove is aligned with the key on the rotating shaft 11 and passes through from bottom to top.

[0048] Assembly of pawl assembly 2: Align the cut edge of pawl 22 with the cut on pawl shaft 21, and thread pawl 22 onto pawl shaft 21 from top to bottom, with the lower end of pawl 22 fitting against the flange of pawl 22 rod; the pawl 22 and pawl shaft 21 assembly passes through the pawl 22 hole in base 3 from bottom to top, and the installation orientation is adjusted so that pawl 22 is embedded in the arc-shaped hole in base 3, with the teeth of pawl 22 facing the ratchet 13; torsion spring 23 is sleeved on pawl shaft 21, with the lower outer edge of torsion spring 23... The rotating arm is inserted into the limiting hole of the torsion spring 23 in the base 3; the handle 26 and the locking pin 25 are respectively installed on the lever 24. The limiting hole of the lever 24 is aligned with the outer rotating arm on the torsion spring 23. The combination of lever 24, handle 26, and locking pin 25 is inserted from top to bottom to about half the position of the outer support arm on the torsion spring 23. The lever 24 is rotated counterclockwise so that the cut position of the middle hole of the lever 24 is aligned with the cut edge of the pawl shaft 21. It is then inserted downwards and locked from the top by the screw 27. Under the torque of the torsion spring 23, the teeth of the pawl 22 mesh with the teeth of the ratchet 13, and the locking pin 25 is not in the rotating wheel 12. In this state, the rotating shaft assembly 1 can only rotate counterclockwise, completing the initial state setting.

[0049] Manually turn handle 26 clockwise to disengage pawl 22 from ratchet 13, maintaining appropriate force to keep pin 25 in contact with the outer side of the upper arc-shaped retaining ring of wheel 12. Rotate shaft assembly 1 clockwise until pin 25 is in the notch of the arc-shaped retaining ring of wheel 12, at which point pin 25 screws into the inner side of the arc-shaped retaining ring of wheel 12. Remove manual force, and pawl assembly 2 rotates counterclockwise under the torque of torsion spring 23. Rotation stops when pin 25 contacts the inner wall of the arc-shaped retaining ring of wheel 12. In this state, pawl 22 disengages from ratchet 13, and shaft assembly 1 can rotate in both directions, with the rotation range extending from the notch of the arc-shaped retaining ring of wheel 12 to the straight edge retaining ring.

[0050] Continue rotating the wheel 12 assembly clockwise. When the straight edge retaining ring of the wheel 12 contacts the locking pin 25, the shaft assembly 1 stops rotating due to the blocking effect of the locking pin 25. In this state, the shaft assembly 1 can only rotate counterclockwise. As the shaft assembly 1 rotates counterclockwise, when the locking pin 25 is in the notch of the arc-shaped retaining ring of the wheel 12, under the torque of the torsion spring 23, the locking pin 25 rotates out of the arc-shaped retaining ring of the wheel 12. The pawl assembly 2 continues to rotate counterclockwise under the torque of the torsion spring 23, and the pawl 22 teeth mesh with the ratchet 13 teeth, returning to the initial state.

[0051] The pawl assembly and the shaft linkage mechanism, in conjunction with other passive drive components such as coiled springs and rope assemblies, can autonomously switch between bidirectional and unidirectional rotation of the shaft 11 without the need for an external control mechanism. The entire mechanism is a mechanical component, featuring small size, flexible switching, long service life, ease of use, and low cost.

[0052] Although the present invention has been disclosed above with reference to preferred embodiments, it is not intended to limit the present invention. Any person skilled in the art can make possible changes and modifications to the technical solutions of the present invention by utilizing the methods and techniques disclosed above without departing from the spirit and scope of the present invention. Therefore, any simple modifications, equivalent changes and alterations made to the above embodiments based on the technical essence of the present invention without departing from the content of the technical solutions of the present invention shall fall within the protection scope of the technical solutions of the present invention.

Claims

1. A pawl assembly and a rotating shaft linkage mechanism, characterized in that: It includes a pivot assembly (1), a pawl assembly (2), and a base (3); wherein, the pivot assembly (1) includes a pivot (11), a wheel (12), a ratchet (13), a wheel key (14), and a ratchet key (15); the pawl assembly (2) includes a pawl shaft (21), a pawl (22), a torsion spring (23), a lever (24), a locking pin (25), a handle (26), and a screw (27); The rotating shaft (11) passes through the circular through hole in the middle of the rotating wheel (12), the base (3), and the ratchet (13), connecting the three in series. The rotating shaft (11) has a groove corresponding to the rotating wheel key (14) and a groove corresponding to the ratchet key (15). The rotating wheel (12) is connected to the rotating shaft (11) through the rotating wheel key (14), and the ratchet (13) is connected to the rotating shaft (11) through the ratchet key (15), rotating with the rotating shaft (11). The pawl shaft (21) passes through the middle through hole of the pawl (22), the base (3), the torsion spring (23), and the lever (24). The four components are connected in series; the pawl (22) and the pawl shaft (21) are connected by a cut edge and a notch, so that the pawl (22) rotates with the pawl shaft (21); the lever (24) and the pawl shaft (21) are connected by a cut edge and a notch, and the lever (24) and the pawl shaft (21) are fixed by a screw (27), so that the lever (24) rotates with the pawl shaft (21); the torsion spring (23) is connected to the lever (24) and the base (3) through the upper and lower outer arms; the handle (26) and the locking pin (25) are both fixed to the lever (24) by threads.

2. The pawl assembly and rotating shaft linkage mechanism according to claim 1, characterized in that: The working process of the linkage mechanism is as follows: In the initial state, set the relative positions of the lever (24) and the pawl (22), adjust the torsion angle of the torsion spring (23) so that the pawl (22) engages with the ratchet (13), and the locking pin (25) is not inside the rotating wheel (12). In this state, the rotating shaft assembly (1) can only rotate counterclockwise. Manually turn the handle (26) clockwise to disengage the pawl (22) from the ratchet (13) teeth; maintain the force so that the locking pin (25) always fits against the outer side of the upper arc-shaped retaining ring of the rotating wheel (12); rotate the shaft assembly (1) clockwise, and when the locking pin (25) is in the notch of the arc-shaped retaining ring of the rotating wheel (12), the locking pin (25) screws into the inner side of the arc-shaped retaining ring of the rotating wheel (12); remove the manual force, and the pawl assembly (2) rotates counterclockwise under the torque of the torsion spring (23). When the locking pin (25) contacts the inner wall of the arc-shaped retaining ring of the rotating wheel (12), it stops rotating; in this state, the pawl (22) disengages from the ratchet (13) teeth, and the shaft assembly (1) achieves bidirectional rotation, with the bidirectional rotation range extending from the notch of the arc-shaped retaining ring of the rotating wheel (12) to the straight edge retaining ring; Continue to rotate the wheel (12) assembly clockwise. When the straight edge retaining ring of the wheel (12) contacts the locking pin (25), the shaft assembly (1) stops rotating due to the blocking of the locking pin (25). In this state, the shaft assembly (1) can only rotate counterclockwise. When the shaft assembly (1) rotates counterclockwise, and the locking pin (25) is in the notch of the arc retaining ring of the wheel (12), the locking pin (25) rotates out of the arc retaining ring of the wheel (12) under the torque of the torsion spring (23). The pawl assembly (2) continues to rotate counterclockwise under the torque of the torsion spring (23), and the pawl (22) teeth mesh with the ratchet (13) teeth, returning to the initial state.

3. The pawl assembly and rotating shaft linkage mechanism according to claim 1, characterized in that: The upper end of the rotating shaft (11) is provided with a countersunk hexagonal hole for controlling the rotation of the rotating shaft (11); a keyway is opened on the shaft body of the rotating shaft (11); a keyway is opened on the middle circular hole of the rotating wheel (12), and the rotating shaft (11) and the rotating wheel (12) are circumferentially connected by the rotating wheel key (14); a keyway is opened on the middle circular hole of the ratchet (13), and the rotating shaft (11) and the ratchet (13) are circumferentially connected by the ratchet key (15) and the rotating shaft (11).

4. The pawl assembly and rotating shaft linkage mechanism according to claim 3, characterized in that: The rotating wheel (12) is provided with an arc-shaped retaining ring and a straight-edge retaining ring. The arc-shaped retaining ring has a notch to control the rotation of the locking pin (25). The straight-edge retaining ring and the locking pin (25) work together to limit the rotation range of the rotating wheel (12). When the locking pin (25) rotates out of the arc-shaped retaining ring, the straight-edge retaining ring is in contact with the locking pin (25) to limit the rotating wheel (12) from continuing to rotate. The locking pin (25) rotates out of the notch under the action of the torsion spring (23).

5. The pawl assembly and rotating shaft linkage mechanism according to claim 4, characterized in that: The pawl shaft (21), pawl (22), torsion spring (23), and lever (24) maintain a certain relative orientation relationship; the pawl shaft (21) and pawl (22) are circumferentially connected through a cut edge and cut structure, and the pawl shaft (21) and lever (24) are circumferentially connected through a cut edge and cut structure; the handle (26) and the locking pin (25) are both threadedly fixed to the lever (24); the upper and lower outer arms of the torsion spring (23) are respectively connected to the limiting holes on the lever (24) and the base (3).

6. The pawl assembly and rotating shaft linkage mechanism according to claim 5, characterized in that: The pawl shaft (21) has a through-cut edge, and the mounting holes of the pawl (22) and the lever (24) are in different positions, so that the relative positional relationship between the pawl (22) and the lever (24) is fixed after the pawl assembly (2) is assembled.

7. The pawl assembly and rotating shaft linkage mechanism according to claim 6, characterized in that: The pawl shaft (21) has a tangent through a circular shaft section to restrict the circumferential rotation of the pawl (22) and lever (24). The end of the pawl shaft (21) has a circular flange to restrict the axial movement of the pawl (22).

8. The pawl assembly and rotating shaft linkage mechanism according to claim 7, characterized in that: The pawl (22) has a cutting edge on the side of the middle hole away from the pawl (22) teeth.

9. The pawl assembly and rotating shaft linkage mechanism according to claim 8, characterized in that: The lever (24) has a cut edge on the outside of the middle hole. The lever (24) is provided with a handle (26) and a locking pin (25) with a threaded hole. The lever (24) is provided with an outer support arm limiting hole for the torsion spring (23).

10. The pawl assembly and rotating shaft linkage mechanism according to claim 1, characterized in that: The base (3) has a rotating shaft (11) mounting hole in the middle, and a pawl shaft (21) mounting hole and a torsion spring (23) lower outer rotating arm limiting hole on the side; the base (3) has a ratchet (13) mounting hole and a pawl (22) moving arc hole on the inner side.

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