Friction-actuated ratchet clutch

Abstract

The invention provides a friction actuating type ratchet clutch which is mainly applied to the technical field of transmission, in particular to the technical field of ratchet clutches. The friction actuating type ratchet wheel clutch at least comprises a pawl, a ratchet wheel, a return spring, a pawl seat and a friction cam. Under the direct or indirect friction action of parts of the friction cam actuating type ratchet wheel clutch, separation and reunion of the pawl and the ratchet wheel are achieved selectively, and contact separation of the pawl and the ratchet wheel is achieved selectively. Compared with the prior art, the friction actuating type ratchet clutch is low in operation noise.

Description

Technical Field

[0001] This invention relates to a friction-actuated ratchet clutch, primarily used in the field of transmission technology. Background Technology

[0002] Ratchet clutches utilize the interaction between a pawl and a ratchet to selectively engage and disengage various forces or motions. Due to their simple structure and high load-bearing capacity, they are widely used in various transmission systems. Ratchet clutches can engage and disengage automatically or with the aid of an external actuation device. When a ratchet clutch operates in the disengaged or overrunning state, especially when used as an overrunning clutch, one-way clutch, or one-way brake, the pawl and ratchet continuously collide under the action of the spring, generating vibration and noise, thus increasing the noise level in the operator's working environment. Therefore, how to selectively disengage the pawl and ratchet when needed has become a pressing technical problem to be solved in the field of ratchet clutches. Summary of the Invention

[0003] To address the aforementioned technical problems existing in ratchet clutches, this invention aims to provide a friction-actuated ratchet clutch. The friction-actuated ratchet clutch is used to connect at least two components of a machine, device, transmission system, or mechanism, and / or to selectively engage or disengage the power or motion of the connected moving parts using the interaction between the pawl and the ratchet, and / or to selectively decelerate, stop, or maintain a stopped state of the connected moving parts using the interaction between the pawl and the ratchet.

[0004] This invention is achieved through the following scheme:

[0005] The friction-actuated ratchet clutch includes: a pawl, a ratchet, a return spring, a pawl seat, and a friction cam. The pawl is mounted on the pawl seat and is rotatable relative to the pawl seat within a certain angle range. Alternatively, the pawl is mounted on the friction cam and is rotatable relative to the friction cam within a certain angle range. The friction cam is mounted on the pawl seat and is rotatable relative to the pawl seat within a certain angle range. The friction cam is connected to the pawl, or the pawl seat is connected to the pawl. The return spring is connected to the pawl. Under the frictional action of the components of the friction cam-actuated ratchet clutch, the pawl and the ratchet selectively disengage. Under the frictional action of the components of the friction cam-actuated ratchet clutch, the pawl and the ratchet selectively engage. The ratchet and the pawl seat are respectively connected to external components (the external components refer to components excluding the components of the friction-actuated ratchet clutch).

[0006] Further, the pawl includes a first pawl 1. The ratchet includes a first ratchet 2. The return spring includes a first return spring 3. The pawl seat includes a first pawl seat 4. The friction cam includes a first friction cam 5. The first pawl 1 is disposed on the first pawl seat 4, and the first pawl 1 is rotatable relative to the first pawl seat 4 within a certain angle range. The first friction cam 5 is disposed on the first pawl seat 4, and the first friction cam 5 is rotatable relative to the first pawl seat 4 between a first limited angle and a second limited angle. The first friction cam 5 interacts with the first ratchet 2 through friction. The first friction cam 5 is connected to the first pawl 1. The first return spring 3 is connected to the first pawl 1. Under the frictional action of the first ratchet 2, when the first friction cam 5 rotates relative to the first pawl seat 4 to the first limited angle position, the first pawl 1 and the first ratchet 2 selectively engage and disengage. Under the frictional action of the first ratchet 2, when the first friction cam 5 rotates relative to the first pawl seat 4 to the second limited angle position, the first pawl 1 disengages from the first ratchet 2. The first ratchet 2 and the first pawl seat 4 are respectively connected to the external components.

[0007] Alternatively, the pawl includes a first pawl 1. The ratchet includes a first ratchet 2. The return spring includes a first return spring 3. The pawl seat includes a first pawl seat 4. The friction cam includes a first friction cam 5. The first pawl 1 is disposed on the first friction cam 5, and the first pawl 1 is rotatable relative to the first friction cam 5 within a certain angle range. The first friction cam 5 is disposed on the first pawl seat 4, and the first friction cam 5 is rotatable relative to the first pawl seat 4 between a first limited angle and a second limited angle. The first friction cam 5 interacts with the first ratchet 2 through friction. The first pawl seat 4 is connected to the first pawl 1. The first return spring 3 is connected to the first pawl 1. Under the frictional action of the first ratchet 2, when the first friction cam 5 rotates relative to the first pawl seat 4 to the first limited angle position, the first pawl 1 and the first ratchet 2 selectively engage and disengage. Under the frictional action of the first ratchet 2, when the first friction cam 5 rotates relative to the first pawl seat 4 to the second limited angle position, the first pawl 1 disengages from the first ratchet 2. The first ratchet 2 and the first pawl seat 4 are respectively connected to the external components.

[0008] Alternatively, the pawl may include a first pawl 1 and a third pawl 15. The ratchet may include a first ratchet 2 and a second ratchet 17. The return spring may include a first return spring 3 and a third return spring 16. The pawl seat may include a first pawl seat 4. The friction cam may include a first friction cam 5. The first pawl 1 is disposed on the first pawl seat 4, and is rotatable relative to the first pawl seat 4 within a certain angle range. The third pawl 15 is disposed on the first pawl seat 4, and is disposed opposite to the first pawl 1, and is rotatable relative to the first pawl seat 4 within a certain angle range. The first friction cam 5 is disposed on the first pawl seat 4, and is rotatable relative to the first pawl seat 4 between a first limited angle and a second limited angle. The first friction cam 5 interacts with the first ratchet 2 through friction. The first friction cam 5 interacts with the second ratchet 17 through friction. The first friction cam 5 is connected to the first pawl 1. The first return spring 3 is connected to the first pawl 1. The first friction cam 5 is connected to the third pawl 15. The third return spring 16 is connected to the third pawl 15. Under the frictional action of the first ratchet 2 and the second ratchet 17, when the first friction cam 5 rotates relative to the first pawl seat 4 to the first limited angle position, the first pawl 1 selectively engages with the first ratchet 2, and the third pawl 15 disengages from the second ratchet 17. Under the frictional action of the first ratchet 2 and the second ratchet 17, when the first friction cam 5 rotates relative to the first pawl seat 4 to the second limited angle position, the third pawl 15 selectively engages with the second ratchet 17, and the first pawl 1 disengages from the first ratchet 2. The first ratchet 2, the first pawl seat 4, and the second ratchet 17 are respectively connected to the external components.

[0009] Alternatively, the pawl includes a first pawl 1 and a third pawl 15. The ratchet includes a first ratchet 2 and a second ratchet 17. The return spring includes a first return spring 3 and a third return spring 16. The pawl seat includes a first pawl seat 4. The friction cam includes a first friction cam 5. The first pawl 1 is disposed on the first friction cam 5, and the first pawl 1 is rotatable relative to the first friction cam 5 within a certain angle range. The third pawl 15 is disposed on the first friction cam 5, and the third pawl 15 is disposed opposite to the first pawl 1, and is rotatable relative to the first friction cam 5 within a certain angle range. The first friction cam 5 is disposed on the first pawl seat 4, and the first friction cam 5 is rotatable relative to the first pawl seat 4 between a first limited angle and a second limited angle. The first friction cam 5 interacts with the first ratchet 2 through friction. The first friction cam 5 interacts with the second ratchet 17 through friction. The first pawl seat 4 is connected to the first pawl 1. The first return spring 3 is connected to the first pawl 1. The first pawl seat 4 is connected to the third pawl 15. The third return spring 16 is connected to the third pawl 15. Under the frictional action of the first ratchet 2 and the second ratchet 17, when the first friction cam 5 rotates relative to the first pawl seat 4 to the first limited angle position, the first pawl 1 selectively engages with the first ratchet 2, and the third pawl 15 disengages from the second ratchet 17. Under the frictional action of the first ratchet 2 and the second ratchet 17, when the first friction cam 5 rotates relative to the first pawl seat 4 to the second limited angle position, the third pawl 15 selectively engages with the second ratchet 17, and the first pawl 1 disengages from the first ratchet 2. The first ratchet 2, the first pawl seat 4, and the second ratchet 17 are respectively connected to the external components.

[0010] Furthermore, the contact force between the friction cam and the ratchet originates from the elastic force of the spring.

[0011] Furthermore, when the friction cam rotates relative to the ratchet seat to the first defined angle position, the friction cam and the ratchet seat have an angle positioning function. When the friction cam rotates relative to the ratchet seat to the second defined angle position, the friction cam and the ratchet seat have an angle positioning function.

[0012] Alternatively, when the friction cam rotates relative to the pawl seat to the first defined angle position, the friction cam and the pawl seat achieve an angle positioning function through a series of bosses and grooves. When the friction cam rotates relative to the pawl seat to the second defined angle position, the friction cam and the pawl seat achieve an angle positioning function through a series of bosses and grooves.

[0013] Alternatively, the friction-actuated ratchet clutch includes a positioning mechanism 8. When the friction cam rotates relative to the pawl seat to the first defined angle position, the friction cam and the pawl seat are positioned at an angle via the positioning mechanism 8. When the friction cam rotates relative to the pawl seat to the second defined angle position, the friction cam and the pawl seat are positioned at an angle via the positioning mechanism 8.

[0014] Furthermore, the friction cam is mounted on the pawl seat via a bearing. The ratchet is connected to the pawl seat via a bearing.

[0015] Compared with existing technologies, the friction-actuated ratchet clutch of the present invention has low operating noise. The friction-actuated ratchet clutch of the present invention can selectively disengage the pawl from the ratchet by utilizing the frictional action of the components, thereby avoiding continuous impact between the pawl and the ratchet.

[0016] The above-mentioned features and advantages of the invention, as well as other features and advantages, will become readily apparent from the following detailed description of the best mode for carrying out the invention, taken in conjunction with the accompanying drawings. However, it should be clearly understood that all the drawings are for illustrative purposes only and not for any limitation on the definition and scope of the invention. Attached Figure Description

[0017] Figures 1-46The diagrams are schematic representations of embodiments 1 to 8. The markings in the diagrams are as follows: 1-First pawl, 2-First ratchet, 3-First return spring, 4-First pawl seat, 5-First friction cam, 8-Positioning mechanism, 9-First positioning boss, 10-First positioning groove, 11-Second positioning groove, 12-First cam bearing, 15-Third pawl, 16-Third return spring, 17-Second ratchet, 19-Radial tooth of the first friction cam 5, 20-Radial tooth groove of the first pawl seat 4, 21-Axial boss of the first pawl seat 4, 22-Radial tooth of the first cam support 51, 23-Axial boss of the first pawl middle seat 49, 24-Axial groove of the first cam support 51, 41-First pawl seat support, 42- Second pawl seat bracket, 43-first pawl seat spring, 44-second pawl seat spring, 45-first pawl seat friction pad, 46-second pawl seat friction pad, 47-first pawl seat rivet, 48-second pawl seat rivet, 49-first pawl center seat, 51-first cam bracket, 52-second cam bracket, 53-first cam spring, 54-second cam spring, 55-first cam friction pad, 56-second cam friction pad, 57-first cam rivet, 58-second cam rivet, 59-third cam rivet, 61-first ratchet bracket, 62-first ratchet bracket spring, 63-first ratchet friction pad, 64-first ratchet rivet, 65-second ratchet rivet. For ease of description, the rotation direction indicated by the arrows in the figure is the forward rotation direction used in the corresponding embodiment. Detailed Implementation

[0018] The present invention will be further described below with reference to the accompanying drawings and embodiments, but the present invention is not limited to the embodiments described. Obviously, what is described is only a part of the preferred embodiments of the present invention, and not all of the embodiments. Those skilled in the art can easily make many changes based on the inventive principles, therefore the present invention is not fixed to the details shown and described, but is intended to include all variations and modifications within the scope of the claims.

[0019] The terminology used herein is for the purpose of describing particular exemplary embodiments only and is not intended to be limiting. The singular forms “a,” “an,” etc., used herein may also be intended to include the plural forms unless the context clearly indicates otherwise. The terms “comprising” and “having” are inclusive and therefore specify the presence of the stated features, integrals, steps, operations, parts, components, parts, and / or assemblies, but do not exclude the presence or addition of one or more other features, integrals, steps, operations, parts, components, assemblies, and / or combinations thereof. The method steps, procedures, and operations described herein should not be construed as requiring them to be performed in the specific order discussed or described, unless specifically identified as such. It should also be understood that additional or alternative steps may be employed.

[0020] While the terms first, second, third, etc., may be used herein to describe various parts, components, parts, assemblies, layers, and / or portions, these parts, components, parts, assemblies, layers, and / or portions should not be limited by these terms. These terms may be used only to distinguish a single part, component, part, assembly, layer, and / or portion. Terms such as “first,” “second,” “third,” and other numerical terms used herein do not imply any order or sequence unless the context clearly indicates otherwise.

[0021] In the embodiments, “axial” refers to the axial direction of the friction-actuated ratchet clutch, and “radial” refers to the radial direction of the friction-actuated ratchet clutch, unless the context clearly indicates otherwise.

[0022] Example 1

[0023] Friction-actuated ratchet clutch, such as Figures 1-6 As shown, the system includes a first pawl 1, a first ratchet 2, a first return spring 3, a first pawl seat 4, and a first friction cam 5. The first friction cam 5 includes a first cam support 51, a first cam spring 53, a first cam friction pad 55, a first cam rivet 57, and a second cam rivet 58. One end of the first cam spring 53 is fixedly connected to the first cam support 51 via the first cam rivet 57. The other end of the first cam spring 53 is fixedly connected to the first cam friction pad 55 via the second cam rivet 58. Thus, the first cam support 51, the first cam spring 53, the first cam friction pad 55, the first cam rivet 57, and the second cam rivet 58 are interconnected to form a single unit (i.e., the first friction cam 5).

[0024] The first ratchet 2 and the first friction cam 5 are both arranged coaxially with the first pawl seat 4. The first ratchet 2 and the first pawl seat 4 are respectively connected to external components (not shown, the external components refer to components excluding the "components of the friction-actuated ratchet clutch") via splines.

[0025] The first friction cam 5 is mounted on the first pawl seat 4 with a clearance fit through a shaft hole, and the first friction cam 5 is rotatable relative to the first pawl seat 4. Under the action of the first pawl 1, the first friction cam 5 is axially fixed relative to the first pawl seat 4. The radial protrusion 19 of the first friction cam 5 engages with the radial groove 20 of the first pawl seat 4, thereby allowing the first friction cam 5 to rotate relative to the first pawl seat 4 between a first defined angle and a second defined angle. Under the elastic action of the first cam spring 53, the first cam friction pad 55 interacts with the first ratchet 2 through friction. Therefore, the first ratchet 2 interacts with the first friction cam 5 through friction.

[0026] The first pawl 1 is mounted on the first pawl seat 4 via a clearance fit through a shaft hole. The first pawl 1 is rotatable relative to the first pawl seat 4 and is axially fixed relative to the first pawl seat 4 via a riveting boss. The first pawl 1 is connected to the first friction cam 5 via contact. The first return spring 3 is connected to the first pawl 1. The first pawl seat 4 interacts with the first pawl 1 through the first return spring 3 and the clearance fit through the shaft hole.

[0027] Under the frictional action of the first ratchet 2, when the first friction cam 5 rotates relative to the first pawl seat 4 to the first predetermined angle position, the first pawl 1 and the first ratchet 2 can be engaged or disengaged under the action of the first return spring 3 and the first friction cam 5. At this time, through the first pawl 1, the first pawl seat 4 can selectively transmit the power or movement of the first pawl seat 4 to the first ratchet 2. Alternatively, through the first pawl 1, the first ratchet 2 can selectively transmit the power or movement of the first ratchet 2 to the first pawl seat 4.

[0028] Under the friction of the first ratchet 2, when the first friction cam 5 rotates relative to the first pawl seat 4 to the second limited angle position, the first pawl 1 disengages from the first ratchet 2 under the action of the first return spring 3 and the first friction cam 5.

[0029] Preferably, in the initial state, the first friction cam 5 is positioned at the first defined angle relative to the first pawl seat 4, and the first pawl 1 is engaged with the first ratchet 2, such as... Figure 5As shown. At this time, in the reverse direction (opposite to the rotation direction indicated by the arrow in the figure), the first ratchet 2 is fixed relative to the first pawl seat 4. When the first ratchet 2 rotates clockwise relative to the first pawl seat 4 (rotation direction indicated by the arrow in the figure), under the friction of the first ratchet 2, the first friction cam 5 can rotate relative to the first pawl seat 4 to the second limited angle position.

[0030] like Figure 6 As shown, when the first friction cam 5 rotates relative to the first pawl seat 4 to the second defined angle position, the first pawl 1 disengages from the first ratchet 2, and the first ratchet 2 can rotate relative to the first pawl seat 4 in the forward rotation direction (the rotation direction indicated by the arrow in the figure). When the first ratchet 2 rotates in the reverse direction relative to the first pawl seat 4 (opposite to the rotation direction indicated by the arrow in the figure), under the friction of the first ratchet 2, the first friction cam 5 can rotate relative to the first pawl seat 4 to the first defined angle position.

[0031] When the first friction cam 5 rotates relative to the first pawl seat 4 to the second defined angle position, and when the first ratchet 2 rotates clockwise relative to the first pawl seat 4, the first pawl 1 disengages from the first ratchet 2, thus preventing continuous impact between the pawl and the ratchet. Although there is friction noise between the first friction cam 5 and the first ratchet 2 at this time, it is relatively low compared to the continuous impact noise generated between the pawl and the ratchet.

[0032] The first friction cam 5 and the first ratchet 2 interact through friction, and after prolonged operation, some wear is inevitable. However, because the first cam spring 53 has a large elastic deformation capacity, the contact pressure between the first friction cam 5 and the first ratchet 2 can be stably maintained within a certain range within a certain service time. Furthermore, it can compensate for some wear between the first friction cam 5 and the first ratchet 2, thereby ensuring stable friction between the first friction cam 5 and the first ratchet 2 within a certain service time.

[0033] Example 2

[0034] Friction-actuated ratchet clutch, such as Figures 7-11As shown, the assembly includes a first pawl 1, a first ratchet 2, a first return spring 3, a first pawl seat 4, a first friction cam 5, and a first cam bearing 12. The first friction cam 5 includes a first cam support 51, a first cam spring 53, a first cam friction pad 55, a first cam rivet 57, and a second cam rivet 58. Preferably, the first friction cam 5 is rotatably mounted on the first pawl seat 4 via the first cam bearing 12. Optionally, the first friction cam 5 can also be mounted on the first pawl seat 4 via a sliding bearing or a clearance fit with a shaft hole. The axial boss 21 of the first pawl seat 4 engages with the first cam support 51, thereby allowing the first friction cam 5 to rotate relative to the first pawl seat 4 between a first defined angle and a second defined angle. The rest is similar to Embodiment 1.

[0035] Example 3

[0036] Friction-actuated ratchet clutch, such as Figures 12-16 As shown, it includes a first pawl 1, a first ratchet 2, a first return spring 3, a first pawl seat 4, a first friction cam 5, and a first cam bearing 12. The first friction cam 5 is a single component. The end face of the first friction cam 5 contacts the first ratchet 2, thereby allowing the first friction cam 5 and the first ratchet 2 to interact through friction. The rest is similar to Embodiment 2.

[0037] Example 4

[0038] Friction-actuated ratchet clutch, such as Figures 17-21 As shown, the device includes a first pawl 1, a first ratchet 2, a first return spring 3, a first pawl seat 4, a first friction cam 5, and a first cam bearing 12. The first ratchet 2 includes a first ratchet bracket 61, a first ratchet bracket spring 62, a first ratchet friction pad 63, a first ratchet rivet 64, and a second ratchet rivet 65. One end of the first ratchet bracket spring 62 is fixedly connected to the first ratchet bracket 61 via the first ratchet rivet 64. The other end of the first ratchet bracket spring 62 is fixedly connected to the first ratchet friction pad 63 via the second ratchet rivet 65. Thus, the first ratchet bracket 61, the first ratchet bracket spring 62, the first ratchet friction pad 63, the first ratchet rivet 64, and the second ratchet rivet 65 are interconnected to form a single unit (i.e., the first ratchet 2). Under the elastic action of the first ratchet bracket spring 62, the first ratchet friction pad 63 interacts with the first friction cam 5 through friction. Therefore, the first ratchet 2 and the first friction cam 5 interact through friction. The rest is similar to Example 3.

[0039] Example 5

[0040] Friction-actuated ratchet clutch, such as Figures 22-26 As shown, the system includes a first pawl 1, a first ratchet 2, a first return spring 3, a first pawl seat 4, and a first friction cam 5. The first friction cam 5 includes a first cam support 51, a second cam support 52, a first cam spring 53, a second cam spring 54, a first cam friction pad 55, a second cam friction pad 56, a first cam rivet 57, and a second cam rivet 58. One end of the first cam spring 53 is fixedly connected to the first cam support 51 via the first cam rivet 57. The other end of the first cam spring 53 is fixedly connected to the first cam friction pad 55. One end of the second cam spring 54 is fixedly connected to the second cam support 52 via the second cam rivet 58. The other end of the second cam spring 54 is fixedly connected to the second cam friction pad 56. Under the action of the first pawl 1, the first cam support 51, the second cam support 52, the first cam spring 53, the second cam spring 54, the first cam friction pad 55, the second cam friction pad 56, the first cam rivet 57, and the second cam rivet 58 are interconnected to form a whole (i.e., the first friction cam 5).

[0041] The first cam support 51 is provided with a first positioning boss 9, and the first pawl seat 4 is provided with a first positioning groove 10 and a second positioning groove 11. The number of the first positioning boss 9, the first positioning groove 10 and the second positioning groove 11 can be set according to the actual working conditions.

[0042] The first ratchet 2 and the first friction cam 5 are both arranged coaxially with the first pawl seat 4. The first ratchet 2 and the first pawl seat 4 are respectively connected to external components (not shown, the external components refer to components excluding the "components of the friction-actuated ratchet clutch") via splines.

[0043] The first cam support 51 and the axial boss 21 of the first pawl seat 4 are fitted with a clearance fit through a shaft hole, thereby allowing the first friction cam 5 to be rotatably mounted on the first pawl seat 4. Under the action of the first pawl 1, the first friction cam 5 is fixed axially relative to the first pawl seat 4. The radial teeth 22 of the first cam support 51 engage with the axial boss 21 of the first pawl seat 4, thereby allowing the first friction cam 5 to rotate relative to the first pawl seat 4 between a first defined angle and a second defined angle. Under the elastic action of the first cam spring 53, the first cam friction pad 55 interacts with the first ratchet 2 through friction. Under the elastic action of the second cam spring 54, the second cam friction pad 56 interacts with the first ratchet 2 through friction. Thus, the first ratchet 2 and the first friction cam 5 interact through friction.

[0044] The first pawl 1 is mounted on the first friction cam 5 via a clearance fit through a shaft hole. The first pawl 1 is rotatable relative to the first friction cam 5 and is axially fixed relative to the first friction cam 5 by riveted bosses at both ends. The first pawl 1 is connected to the first pawl seat 4 via a contact. The first return spring 3 is connected to the first pawl 1. The first friction cam 5 interacts with the first pawl 1 through the first return spring 3 and the clearance fit through the shaft hole.

[0045] Under the frictional action of the first ratchet 2, when the first friction cam 5 rotates relative to the first pawl seat 4 to the first limited angle position, the first pawl 1 and the first ratchet 2 can be engaged or disengaged under the action of the first return spring 3 and the first pawl seat 4. At this time, through the first pawl 1, the first pawl seat 4 can selectively transmit the power or movement of the first pawl seat 4 to the first ratchet 2. Alternatively, through the first pawl 1, the first ratchet 2 can selectively transmit the power or movement of the first ratchet 2 to the first pawl seat 4.

[0046] Furthermore, when the first friction cam 5 is at the first defined angle position relative to the first pawl seat 4, the first pawl seat 4 provides a certain angular positioning function for the first friction cam 5 through the interaction between the first positioning boss 9 and the first positioning groove 10. At this time, even with external interference or power impact, the first friction cam 5 remains at the first defined angle position relative to the first pawl seat 4. Therefore, through the interaction between the first positioning boss 9 and the first positioning groove 10, the friction-actuated ratchet clutch has a certain shifting reliability and stability at the first defined angle position.

[0047] Under the friction of the first ratchet 2, when the first friction cam 5 rotates relative to the first pawl seat 4 to the second limited angle position, the first pawl 1 disengages from the first ratchet 2 under the action of the first return spring 3 and the first pawl seat 4.

[0048] Similarly, when the first friction cam 5 is at the second defined angle position relative to the first pawl seat 4, the first pawl seat 4 provides a certain angular positioning function for the first friction cam 5 through the interaction between the first positioning boss 9 and the second positioning groove 11. At this time, even with external interference or power impact, the first friction cam 5 remains at the second defined angle position relative to the first pawl seat 4. Therefore, through the interaction between the first positioning boss 9 and the second positioning groove 11, the friction-actuated ratchet clutch has a certain degree of shifting reliability and stability at the second defined angle position.

[0049] Preferably, in the initial state, the first friction cam 5 is positioned at the first defined angle relative to the first pawl seat 4, and the first pawl 1 is engaged with the first ratchet 2, such as... Figure 25 As shown. At this time, in the reverse direction (opposite to the rotation direction indicated by the arrow in the figure), the first ratchet 2 is fixed relative to the first pawl seat 4. When the first ratchet 2 rotates clockwise relative to the first pawl seat 4 (rotation direction indicated by the arrow in the figure), under the friction of the first ratchet 2, the first friction cam 5 can rotate relative to the first pawl seat 4 to the second limited angle position.

[0050] like Figure 26 As shown, when the first friction cam 5 rotates relative to the first pawl seat 4 to the second defined angle position, the first pawl 1 disengages from the first ratchet 2, and the first ratchet 2 can rotate relative to the first pawl seat 4 in the forward rotation direction (the rotation direction indicated by the arrow in the figure). When the first ratchet 2 rotates in the reverse direction relative to the first pawl seat 4 (opposite to the rotation direction indicated by the arrow in the figure), under the friction of the first ratchet 2, the first friction cam 5 can rotate relative to the first pawl seat 4 to the first defined angle position.

[0051] When the first friction cam 5 rotates relative to the first pawl seat 4 to the second defined angle position, and when the first ratchet 2 rotates clockwise relative to the first pawl seat 4, the first pawl 1 disengages from the first ratchet 2, thus preventing continuous impact between the pawl and the ratchet. Although there is friction noise between the first friction cam 5 and the first ratchet 2 at this time, it is relatively low compared to the continuous impact noise generated between the pawl and the ratchet.

[0052] The first friction cam 5 and the first ratchet 2 interact through friction, and after prolonged operation, some wear is inevitable. However, because the first cam spring 53 and the second cam spring 54 have large elastic deformation capabilities, the contact pressure between the first friction cam 5 and the first ratchet 2 can be stably maintained within a certain range within a certain usage time. Furthermore, they can compensate for some wear between the first friction cam 5 and the first ratchet 2, thereby ensuring stable friction between the first friction cam 5 and the first ratchet 2 within a certain usage time.

[0053] Example 6

[0054] Friction-actuated ratchet clutch, such as Figures 27-34 As shown, it includes a first pawl 1, a first ratchet 2, a first return spring 3, a first pawl seat 4, a first friction cam 5, and a positioning mechanism 8. The first friction cam 5 includes a first cam bracket 51, a first cam spring 53, a first cam friction pad 55, a first cam rivet 57, and a second cam rivet 58. The first pawl seat 4 is provided with a first positioning groove 10 and a second positioning groove 11, as shown... Figure 31 As shown. The number of the positioning mechanism 8, the first positioning groove 10, and the second positioning groove 11 can be set according to actual working conditions. One end of the first cam spring 53 is fixedly connected to the first cam bracket 51 through the first cam rivet 57. The other end of the first cam spring 53 is fixedly connected to the first cam friction pad 55 through the second cam rivet 58. Thus, the first cam bracket 51, the first cam spring 53, the first cam friction pad 55, the first cam rivet 57, and the second cam rivet 58 are connected to each other to form a whole (i.e., the first friction cam 5).

[0055] The positioning mechanism 8 is fixed to the first cam support 51 via an interference fit through a shaft hole. The structure of the positioning mechanism 8 is as follows: Figure 32 As shown.

[0056] The first ratchet 2 and the first friction cam 5 are both arranged coaxially with the first pawl seat 4. The first ratchet 2 and the first pawl seat 4 are respectively connected to external components (not shown, the external components refer to components excluding the "components of the friction-actuated ratchet clutch") via splines.

[0057] The first friction cam 5 is mounted on the first pawl seat 4 with a clearance fit through a shaft hole, and the first friction cam 5 is rotatable relative to the first pawl seat 4. Under the action of the first pawl 1, the first friction cam 5 is axially fixed relative to the first pawl seat 4. The radial protrusion 22 of the first cam support 51 engages with the axial boss 21 of the first pawl seat 4, thereby allowing the first friction cam 5 to rotate relative to the first pawl seat 4 between a first defined angle and a second defined angle. Under the elastic action of the first cam spring 53, the first cam friction pad 55 interacts with the first ratchet 2 through friction. Therefore, the first ratchet 2 interacts with the first friction cam 5 through friction.

[0058] The first pawl 1 is mounted on the first pawl seat 4 via a clearance fit through a shaft hole. The first pawl 1 is rotatable relative to the first pawl seat 4 and is radially fixed relative to the first pawl seat 4 via a riveting boss. The first pawl 1 is connected to the first friction cam 5 via contact. The first return spring 3 is connected to the first pawl 1. The first pawl seat 4 interacts with the first pawl 1 via the first return spring 3 and the clearance fit through the shaft hole.

[0059] Under the frictional action of the first ratchet 2, when the first friction cam 5 rotates relative to the first pawl seat 4 to the first predetermined angle position, the first pawl 1 and the first ratchet 2 can be engaged or disengaged under the action of the first return spring 3 and the first friction cam 5. At this time, through the first pawl 1, the first pawl seat 4 can selectively transmit the power or movement of the first pawl seat 4 to the first ratchet 2. Alternatively, through the first pawl 1, the first ratchet 2 can selectively transmit the power or movement of the first ratchet 2 to the first pawl seat 4.

[0060] Furthermore, when the first friction cam 5 is at the first defined angle position relative to the first pawl seat 4, the first pawl seat 4 provides a certain angular positioning function for the first friction cam 5 through the interaction between the positioning mechanism 8 and the first positioning groove 10. At this time, even with external interference or power impact, the first friction cam 5 remains at the first defined angle position relative to the first pawl seat 4. Therefore, through the interaction between the positioning mechanism 8 and the first positioning groove 10, the friction-actuated ratchet clutch has a certain degree of shifting reliability and stability at the first defined angle position.

[0061] Under the friction of the first ratchet 2, when the first friction cam 5 rotates relative to the first pawl seat 4 to the second limited angle position, the first pawl 1 disengages from the first ratchet 2 under the action of the first return spring 3 and the first friction cam 5.

[0062] Similarly, when the first friction cam 5 is at the second defined angle position relative to the first pawl seat 4, the first pawl seat 4 provides a certain angular positioning function for the first friction cam 5 through the interaction between the positioning mechanism 8 and the second positioning groove 11. At this time, even with external interference or power impact, the first friction cam 5 remains at the second defined angle position relative to the first pawl seat 4. Therefore, through the interaction between the positioning mechanism 8 and the second positioning groove 11, the friction-actuated ratchet clutch has a certain degree of shifting reliability and stability at the second defined angle position.

[0063] like Figure 33 As shown, when the first friction cam 5 rotates relative to the first pawl seat 4 to the first defined angle position, and when the first pawl 1 and the first ratchet 2 are in an engaged state, the first ratchet 2 is fixed relative to the first pawl seat 4 in the reverse direction (opposite to the rotation direction shown by the arrow in the figure).

[0064] like Figure 34 As shown, when the first friction cam 5 rotates relative to the first pawl seat 4 to the second limited angle position, the first pawl 1 disengages from the first ratchet 2, and the first ratchet 2 can rotate relative to the first pawl seat 4 in the forward rotation direction (rotation direction indicated by the arrow in the figure).

[0065] The rest is similar to Example 1.

[0066] Example 7

[0067] Friction-actuated ratchet clutch, such as Figures 35-39 As shown, it includes a first pawl 1, a first ratchet 2, a first return spring 3, a first pawl seat 4, a first friction cam 5, a third pawl 15, a third return spring 16, and a second ratchet 17.

[0068] The first friction cam 5 includes a first cam support 51, a first cam spring 53, a second cam spring 54, a first cam friction pad 55, a second cam friction pad 56, a first cam rivet 57, and a second cam rivet 58. One end of the first cam spring 53 is fixedly connected to the first cam support 51 via the first cam rivet 57. The other end of the first cam spring 53 is fixedly connected to the first cam friction pad 55. One end of the second cam spring 54 is fixedly connected to the first cam support 51 via the second cam rivet 58. The other end of the second cam spring 54 is fixedly connected to the second cam friction pad 56. Thus, the first cam support 51, the first cam spring 53, the second cam spring 54, the first cam friction pad 55, the second cam friction pad 56, the first cam rivet 57, and the second cam rivet 58 are interconnected to form a whole (i.e., the first friction cam 5).

[0069] The first pawl seat 4 includes a first pawl seat bracket 41, a second pawl seat bracket 42, a first pawl seat rivet 47, and a first pawl center seat 49. The first pawl seat bracket 41 is coaxially arranged with the right pawl bracket 42. Under the action of the first pawl seat rivet 47, the first pawl seat bracket 41, the second pawl seat bracket 42, the first pawl seat rivet 47, and the first pawl center seat 49 are connected to each other to form a whole (i.e., the first pawl seat 4).

[0070] The first ratchet 2, the first friction cam 5, and the second ratchet 17 are all coaxially arranged with the first pawl seat 4. The first ratchet 2, the first pawl seat 4, and the second ratchet 17 are respectively connected to external components (not shown, the external components refer to components excluding the "components of the friction-actuated ratchet clutch") via splines.

[0071] The axial boss 23 of the first pawl seat 49 and the axial groove 24 of the first cam support 51 are fitted with a clearance, thereby allowing the first friction cam 5 to be rotatably mounted on the first pawl seat 4, and the first friction cam 5 to be fixed axially relative to the first pawl seat 4. The axial boss 23 of the first pawl seat 49 engages with the axial groove 24 of the first cam support 51, thereby allowing the first friction cam 5 to rotate relative to the first pawl seat 4 between a first defined angle and a second defined angle. Under the elastic action of the first cam spring 53, the first cam friction pad 55 interacts with the first ratchet 2 through friction. Thus, the first ratchet 2 interacts with the first friction cam 5 through friction. Under the elastic action of the second cam spring 54, the second cam friction pad 56 interacts with the second ratchet 17 through friction. Thus, the second ratchet 17 interacts with the first friction cam 5 through friction.

[0072] The first pawl 1 is mounted on the first pawl seat 4 via a clearance fit through a shaft hole. The first pawl 1 is rotatable relative to the first pawl seat 4, and is axially fixed relative to the first pawl seat 4. The first pawl 1 is connected to the first friction cam 5 via a contact. The first return spring 3 is connected to the first pawl 1. The first pawl seat 4 interacts with the first pawl 1 through the first return spring 3 and the clearance fit through the shaft hole.

[0073] Relative to the first pawl 1, the third pawl 15 is disposed opposite to the first pawl seat 4 via a clearance fit through a shaft hole. The third pawl 15 is rotatable relative to the first pawl seat 4, and is axially fixed relative to the first pawl seat 4. The third pawl 15 is connected to the first friction cam 5 via contact. The third return spring 16 is connected to the third pawl 15. The first pawl seat 4 interacts with the third pawl 15 through the third return spring 16 and the clearance fit through the shaft hole.

[0074] Under the frictional action of the first ratchet 2 and the second ratchet 17, when the first friction cam 5 rotates relative to the first pawl seat 4 to the first limited angle position, the first pawl 1 and the first ratchet 2 can be engaged or disengaged under the action of the first return spring 3 and the first friction cam 5, and the third pawl 15 disengages from the second ratchet 17 under the action of the first friction cam 5 and the third return spring 16. At this time, through the first pawl 1, the first pawl seat 4 can selectively transmit the power or movement of the first pawl seat 4 to the first ratchet 2. Alternatively, through the first pawl 1, the first ratchet 2 can selectively transmit the power or movement of the first ratchet 2 to the first pawl seat 4.

[0075] Under the frictional action of the first ratchet 2 and the second ratchet 17, when the first friction cam 5 rotates relative to the first pawl seat 4 to the second limited angle position, the first pawl 1 disengages from the first ratchet 2 under the action of the first return spring 3 and the first friction cam 5, and the third pawl 15 engages or disengages from the second ratchet 17 under the action of the first friction cam 5 and the third return spring 16. At this time, through the third pawl 15, the first pawl seat 4 can selectively transmit the power or movement of the first pawl seat 4 to the second ratchet 17. Alternatively, through the third pawl 15, the second ratchet 17 can selectively transmit the power or movement of the second ratchet 17 to the first pawl seat 4.

[0076] Preferably, in the initial state, the first friction cam 5 is positioned at the first defined angle relative to the first pawl seat 4, the first pawl 1 is engaged with the first ratchet 2, and the third pawl 15 is disengaged from the second ratchet 17. Figure 38 As shown (for ease of illustration, the first ratchet support bracket 41 is hidden in the figure). At this time, in the forward rotation direction (the rotation direction indicated by the arrow in the figure), the first ratchet 2 is fixed relative to the first ratchet support 4, and in the reverse rotation direction (opposite to the rotation direction indicated by the arrow in the figure), the second ratchet 17 can rotate relative to the first ratchet support 4.

[0077] like Figure 39As shown (the first pawl support bracket 41 is hidden in the figure for ease of illustration), the first friction cam 5 is positioned at the first defined angle relative to the first pawl seat 4, and the first pawl 1 is separated from the first ratchet 2, while the third pawl 15 is disengaged from the second ratchet 17. At this time, when both the first ratchet 2 and the second ratchet 17 rotate clockwise relative to the first pawl seat 4 (in the direction of rotation indicated by the arrow in the figure), under the frictional action of the first ratchet 2 and the second ratchet 17, the first friction cam 5 can rotate relative to the first pawl seat 4 to the second defined angle position.

[0078] like Figure 40 (For ease of demonstration, the first pawl support bracket 41 is hidden in the figure.) As shown, the first friction cam 5 is at the second defined angle position relative to the first pawl support 4, and the first pawl 1 is in a disengaged state from the first ratchet 2, while the third pawl 15 is in an engaged state with the second ratchet 17. At this time, in the forward rotation direction (the rotation direction indicated by the arrow in the figure), the first ratchet 2 is rotatable relative to the first pawl support 4, and in the reverse rotation direction (opposite to the rotation direction indicated by the arrow in the figure), the second ratchet 17 is fixed relative to the first pawl support 4.

[0079] like Figure 41 (For ease of illustration, the first pawl support bracket 41 is hidden in the figure.) As shown, the first friction cam 5 is at the second defined angle position relative to the first pawl support 4, and the first pawl 1 is in a disengaged state from the first ratchet 2, while the third pawl 15 is separated from the second ratchet 17. At this time, when both the first ratchet 2 and the second ratchet 17 are reversed relative to the first pawl support 4 (opposite to the rotation direction indicated by the arrow in the figure), under the friction of the first ratchet 2 and the second ratchet 17, the first friction cam 5 can rotate relative to the first pawl support 4 to the first defined angle position.

[0080] Example 8

[0081] Friction-actuated ratchet clutch, such as Figures 40-44 As shown, it includes a first pawl 1, a first ratchet 2, a first return spring 3, a first pawl seat 4, a first friction cam 5, a third pawl 15, a third return spring 16, and a second ratchet 17.

[0082] The first friction cam 5 includes a first cam support 51, a second cam support 52, a first cam spring 53, a second cam spring 54, a first cam friction pad 55, a second cam friction pad 56, a first cam rivet 57, a second cam rivet 58, and a third cam rivet 59. One end of the first cam spring 53 is fixedly connected to the first cam support 51 via the second cam rivet 58. The other end of the first cam spring 53 is fixedly connected to the first cam friction pad 55. One end of the second cam spring 54 is fixedly connected to the second cam support 52 via the third cam rivet 59. The other end of the second cam spring 54 is fixedly connected to the second cam friction pad 56. Under the action of the first ratchet seat 4, the first cam support 51, the second cam support 52, the first cam spring 53, the second cam spring 54, the first cam friction pad 55, the second cam friction pad 56, the first cam rivet 57, the second cam rivet 58, and the third cam rivet 59 are interconnected to form a whole (i.e., the first friction cam 5).

[0083] The first ratchet 2, the first friction cam 5, and the second ratchet 17 are all coaxially arranged with the first pawl seat 4. The first ratchet 2, the first pawl seat 4, and the second ratchet 17 are respectively connected to external components (not shown, the external components refer to components excluding the "components of the friction-actuated ratchet clutch") via splines.

[0084] The first cam rivet 57 engages with the radial toothed groove 20 of the first pawl seat 4, thereby rotatably mounting the first friction cam 5 on the first pawl seat 4. Under the action of the first cam support 51, the second cam support 52, and the first cam rivet 57, the first friction cam 5 is axially fixed relative to the first pawl seat 4. The first cam rivet 57 engages with the radial toothed groove 20 of the first pawl seat 4, thereby allowing the first friction cam 5 to rotate relative to the first pawl seat 4 between a first defined angle and a second defined angle.

[0085] The first pawl 1 is mounted on the first cam support 51 via a clearance fit through a shaft hole. The first pawl 1 is rotatable relative to the first cam support 51 and is radially fixed relative to the first cam support 51 via a riveting boss. The first pawl 1 is connected to the first pawl seat 4 via a contact. The first return spring 3 is connected to the first pawl 1. The first friction cam 5 interacts with the first pawl 1 via the first return spring 3 and the clearance fit through the shaft hole.

[0086] Relative to the first pawl 1, the third pawl 15 is disposed in the opposite direction on the second cam support 52 via a clearance fit through a shaft hole. The third pawl 15 is rotatable relative to the second cam support 52 and is radially fixed relative to the second cam support 52 via a riveted boss. The third pawl 15 is connected to the first pawl seat 4 through contact. The third return spring 16 is connected to the third pawl 15. The first friction cam 5 interacts with the third pawl 15 through the third return spring 16 and the clearance fit through the shaft hole.

[0087] The rest is similar to Example 7.

[0088] It should be noted that the above embodiments are illustrative of the invention and not restrictive, and those skilled in the art can devise alternative embodiments without departing from the scope of the appended claims. Therefore, the embodiments should be considered exemplary and non-limiting, and the scope of the invention is defined by the appended claims rather than the foregoing description. Thus, all variations falling within the meaning and scope of equivalents of the claims are intended to be included within the invention, and no reference numerals in the claims should be construed as limiting the scope of the claims. In the claims, the word "comprising" does not exclude the presence of data or steps not listed in the claims.

[0089] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment includes only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A friction-actuated ratchet clutch for connecting at least two components of a machine, device, transmission system or mechanism, and / or selectively enabling the power or movement of the connected moving component by the interaction of pawl and ratchet, and / or selectively enabling the deceleration, stop or maintaining the stop state of the connected moving component by the interaction of pawl and ratchet, characterized in that: the friction-actuated ratchet clutch at least comprises a pawl, a ratchet, a return spring, a pawl seat, a friction cam; and / or the pawl is directly or indirectly arranged on the pawl seat, within a certain angle range, the pawl is rotatable relative to the pawl seat, or the pawl is directly or indirectly arranged on the friction cam, within a certain angle range, the pawl is rotatable relative to the friction cam; and / or the friction cam is directly or indirectly arranged on the pawl seat, within a certain angle range, the friction cam is rotatable relative to the pawl seat; and / or the friction cam is directly or indirectly connected with the pawl, or the pawl seat is directly or indirectly connected with the pawl; and / or the return spring is directly or indirectly connected with the pawl; and / or under the direct or indirect frictional action of the components of the friction-cam-actuated ratchet clutch, the pawl and the ratchet selectively achieve disengagement; and / or under the direct or indirect frictional action of the components of the friction-cam-actuated ratchet clutch, the pawl and the ratchet selectively achieve engagement; and / or the ratchet and the pawl seat are respectively connected with the components of the machine, or the ratchet and the pawl seat are respectively connected with the components of the device, or the ratchet and the pawl seat are respectively connected with the components of the transmission system, or the ratchet and the pawl seat are respectively connected with the components of the mechanism.

2. The friction-actuated ratchet clutch according to claim 1, characterized in that: the pawl at least comprises a first pawl (1); and / or the ratchet at least comprises a first ratchet (2); and / or the return spring at least comprises a first return spring (3); and / or the pawl seat at least comprises a first pawl seat (4); and / or the friction cam at least comprises a first friction cam (5); and / or the first pawl (1) is directly or indirectly arranged on the first pawl seat (4), within a certain angle range, the first pawl (1) is rotatable relative to the first pawl seat (4); and / or the first friction cam (5) is directly or indirectly arranged on the first pawl seat (4), between a first limited angle and a second limited angle, the first friction cam (5) is rotatable relative to the first pawl seat (4); and / or the first friction cam (5) and the first ratchet (2) interact by friction; and / or the first friction cam (5) is directly or indirectly connected with the first pawl (1); and / or the first return spring (3) is directly or indirectly connected with the first pawl (1); and / or ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ under the friction of the first ratchet wheel (2), when the first friction cam (5) rotates to the first limited angle position relative to the first pawl seat (4), the first pawl (1) and the first ratchet wheel (2) are selectively engaged and disengaged; and / or under the friction of the first ratchet wheel (2), when the first friction cam (5) rotates to the second limited angle position relative to the first pawl seat (4), the first pawl (1) and the first ratchet wheel (2) are disengaged; and / or The first ratchet wheel (2) and the first pawl seat (4) are respectively connected with the parts of the machine, or the first ratchet wheel (2) and the first pawl seat (4) are respectively connected with the parts of the device, or the first ratchet wheel (2) and the first pawl seat (4) are respectively connected with the parts of the transmission system, or the first ratchet wheel (2) and the first pawl seat (4) are respectively connected with the parts of the mechanism; and / or The first pawl (1) comprises at least one or more parts; and / or The first ratchet wheel (2) comprises at least one or more parts; and / or The first return spring (3) comprises at least one or more parts; and / or The first pawl seat (4) comprises at least one or more parts; and / or The first friction cam (5) comprises at least one or more parts.

3. The friction-actuated ratchet clutch according to claim 1, wherein: The pawl comprises at least a first pawl (1); and / or The ratchet wheel comprises at least a first ratchet wheel (2); and / or The return spring comprises at least a first return spring (3); and / or The pawl seat comprises at least a first pawl seat (4); and / or The friction cam comprises at least a first friction cam (5); and / or The first pawl (1) is directly or indirectly arranged on the first friction cam (5), and the first pawl (1) is rotatable relative to the first friction cam (5) within a certain angle range; and / or The first friction cam (5) is directly or indirectly arranged on the first pawl seat (4), and the first friction cam (5) is rotatable relative to the first pawl seat (4) between a first limited angle and a second limited angle; and / or The first friction cam (5) and the first ratchet wheel (2) interact through friction; and / or The first pawl seat (4) is directly or indirectly connected with the first pawl (1); and / or The first return spring (3) is directly or indirectly connected with the first pawl (1); and / or under the friction of the first ratchet wheel (2), when the first friction cam (5) rotates to the first limited angle position relative to the first pawl seat (4), the first pawl (1) and the first ratchet wheel (2) are selectively engaged and disengaged; and / or under the friction of the first ratchet wheel (2), when the first friction cam (5) rotates to the second limited angle position relative to the first pawl seat (4), the first pawl (1) and the first ratchet wheel (2) are disengaged; and / or The first ratchet (2) and the first pawl seat (4) are connected with parts of the machine, or the first ratchet (2) and the first pawl seat (4) are connected with parts of the device, or the first ratchet (2) and the first pawl seat (4) are connected with parts of the transmission system, or the first ratchet (2) and the first pawl seat (4) are connected with parts of the mechanism; and / or The first pawl (1) comprises at least one or more parts; and / or The first ratchet (2) comprises at least one or more parts; and / or The first return spring (3) comprises at least one or more parts; and / or The first pawl seat (4) comprises at least one or more parts; and / or The first friction cam (5) comprises at least one or more parts.

4. The friction-actuated ratchet clutch according to claim 1, wherein: The pawls comprise at least a first pawl (1) and a third pawl (15); and / or The ratchets comprise at least a first ratchet (2) and a second ratchet (17); and / or The return springs comprise at least a first return spring (3) and a third return spring (16); and / or The pawl seats comprise at least a first pawl seat (4); and / or The friction cams comprise at least a first friction cam (5); and / or The first pawl (1) is directly or indirectly arranged on the first pawl seat (4), and the first pawl (1) is rotatable relative to the first pawl seat (4) within a certain angle range; and / or The third pawl (15) is directly or indirectly arranged on the first pawl seat (4), and the third pawl (15) is arranged in reverse to the first pawl (1), and the third pawl (15) is rotatable relative to the first pawl seat (4) within a certain angle range; and / or The first friction cam (5) is directly or indirectly arranged on the first pawl seat (4), and the first friction cam (5) is rotatable relative to the first pawl seat (4) between a first limited angle and a second limited angle; and / or The first friction cam (5) and the first ratchet (2) interact through friction; and / or The first friction cam (5) and the second ratchet (17) interact through friction; and / or The first friction cam (5) is directly or indirectly connected with the first pawl (1); and / or The first return spring (3) is directly or indirectly connected with the first pawl (1); and / or The first friction cam (5) is directly or indirectly connected with the third pawl (15); and / or The third return spring (16) is directly or indirectly connected with the third pawl (15); and / or The third return spring (16) is directly or indirectly connected with the third pawl (15); and / or under the frictional action of the first ratchet wheel (2) and the second ratchet wheel (17), when the first friction cam (5) rotates to the first limited angular position relative to the first pawl seat (4), the first pawl (1) and the first ratchet wheel (2) are selectively in engagement and disengagement, and the third pawl (15) is out of contact with the second ratchet wheel (17); and / or under the frictional action of the first ratchet wheel (2) and the second ratchet wheel (17), when the first friction cam (5) rotates to the second limited angular position relative to the first pawl seat (4), the third pawl (15) and the second ratchet wheel (17) are selectively in engagement and disengagement, and the first pawl (1) is out of contact with the first ratchet wheel (2); and / or the first ratchet wheel (2), the first pawl seat (4) and the second ratchet wheel (17) are respectively connected with parts of the machine, or the first ratchet wheel (2), the first pawl seat (4) and the second ratchet wheel (17) are respectively connected with parts of the device, or the first ratchet wheel (2), the first pawl seat (4) and the second ratchet wheel (17) are respectively connected with parts of the transmission system, or the first ratchet wheel (2), the first pawl seat (4) and the second ratchet wheel (17) are respectively connected with parts of the mechanism; and / or the first pawl (1) comprises at least one or more parts; and / or the third pawl (15) comprises at least one or more parts; and / or the first ratchet wheel (2) comprises at least one or more parts; and / or the second ratchet wheel (17) comprises at least one or more parts; and / or the first return spring (3) comprises at least one or more parts; and / or the third return spring (16) comprises at least one or more parts; and / or the first pawl seat (4) comprises at least one or more parts; and / or the first friction cam (5) comprises at least one or more parts.

5. The friction-actuated ratchet clutch according to claim 1, wherein: the pawls comprise at least a first pawl (1) and a third pawl (15); and / or the ratchet wheels comprise at least a first ratchet wheel (2) and a second ratchet wheel (17); and / or the return springs comprise at least a first return spring (3) and a third return spring (16); and / or the pawl seats comprise at least a first pawl seat (4); and / or the friction cams comprise at least a first friction cam (5); and / or the first pawl (1) is directly or indirectly arranged on the first friction cam (5) and is rotatable relative to the first friction cam (5) within a certain angular range; and / or the third pawl (15) is directly or indirectly arranged on the first friction cam (5) and is arranged in reverse relative to the first pawl (1), and is rotatable relative to the first friction cam (5) within a certain angular range; and / or The first friction cam (5) is directly or indirectly arranged on the first pawl seat (4), and is rotatable relative to the first pawl seat (4) between a first limited angle and a second limited angle; and / or The first friction cam (5) and the first ratchet wheel (2) interact through friction; and / or The first friction cam (5) and the second ratchet wheel (17) interact through friction; and / or The first pawl seat (4) is directly or indirectly connected with the first pawl (1); and / or The first return spring (3) is directly or indirectly connected with the first pawl (1); and / or The first pawl seat (4) is directly or indirectly connected with the third pawl (15); and / or The third return spring (16) is directly or indirectly connected with the third pawl (15); and / or Under the friction of the first ratchet wheel (2) and the second ratchet wheel (17), when the first friction cam (5) rotates to the first limited angle position relative to the first pawl seat (4), the first pawl (1) and the first ratchet wheel (2) selectively realize engagement and disengagement, and the third pawl (15) is out of contact with the second ratchet wheel (17); and / or Under the friction of the first ratchet wheel (2) and the second ratchet wheel (17), when the first friction cam (5) rotates to the second limited angle position relative to the first pawl seat (4), the third pawl (15) and the second ratchet wheel (17) selectively realize engagement and disengagement, and the first pawl (1) is out of contact with the first ratchet wheel (2); and / or The first ratchet wheel (2), the first pawl seat (4) and the second ratchet wheel (17) are respectively connected with parts of the machine, or the first ratchet wheel (2), the first pawl seat (4) and the second ratchet wheel (17) are respectively connected with parts of the device, or the first ratchet wheel (2), the first pawl seat (4) and the second ratchet wheel (17) are respectively connected with parts of the transmission system, or the first ratchet wheel (2), the first pawl seat (4) and the second ratchet wheel (17) are respectively connected with parts of the mechanism; and / or The first pawl (1) comprises at least one or more parts; and / or The third pawl (15) comprises at least one or more parts; and / or The first ratchet wheel (2) comprises at least one or more parts; and / or The second ratchet wheel (17) comprises at least one or more parts; and / or The first return spring (3) comprises at least one or more parts; and / or The third return spring (16) comprises at least one or more parts; and / or The first pawl seat (4) comprises at least one or more parts; and / or The first friction cam (5) comprises at least one or more parts.

6. The friction-actuated ratchet clutch according to any one of claims 1-5, wherein: The contact force between the friction cam and the ratchet wheel is directly or indirectly derived from the spring force of a spring.

7. The friction-actuated ratchet clutch according to any one of claims 2 to 5, characterized in that: the friction cam and the pawl seat have an angular positioning function when the friction cam is rotated to the first defined angular position relative to the pawl seat; and / or the friction cam and the pawl seat have an angular positioning function when the friction cam is rotated to the second defined angular position relative to the pawl seat.

8. The friction-actuated ratchet clutch according to any one of claims 2 to 5, characterized in that: the friction cam and the pawl seat have an angular positioning function through a series of protrusions and / or recesses when the friction cam is rotated to the first defined angular position relative to the pawl seat; and / or the friction cam and the pawl seat have an angular positioning function through a series of protrusions and / or recesses when the friction cam is rotated to the second defined angular position relative to the pawl seat.

9. The friction-actuated ratchet clutch according to any one of claims 2 to 5, characterized in that: the friction-actuated ratchet clutch comprises at least a positioning mechanism (8); and / or the friction cam and the pawl seat have an angular positioning function through the positioning mechanism (8) when the friction cam is rotated to the first defined angular position relative to the pawl seat; and / or the friction cam and the pawl seat have an angular positioning function through the positioning mechanism (8) when the friction cam is rotated to the second defined angular position relative to the pawl seat.

10. The friction-actuated ratchet clutch according to any one of claims 1 to 5, characterized in that: the friction cam is arranged on the pawl seat directly or indirectly through a bearing; and / or the ratchet is connected to the pawl seat directly or indirectly through a bearing.

Images