Ratchet clutch with centrifugal block and friction cam

Abstract

The invention provides a ratchet clutch with a centrifugal block and a friction cam, which is mainly applied to the technical field of transmission, in particular to the technical field of ratchet clutches. The clutch at least comprises a pawl, a ratchet wheel, a return spring, a pawl seat, a friction cam, a separation spring and a centrifugal block. And under the direct or indirect action of the centrifugal force of the centrifugal block, the friction cam can selectively interact with the pawl seat or the ratchet wheel through the friction of the separation spring. And under the friction action of the separation spring, the friction cam can selectively rotate relative to the ratchet wheel or the pawl seat within a certain angle range. And under the direct or indirect action of the friction cam, the return spring and the pawl, the pawl seat and the ratchet wheel can be selectively separated and combined. Compared with the prior art, the ratchet clutch provided with the centrifugal block and the friction cam can reduce operation noise between the pawl and the ratchet wheel in a separated state.

Description

Technical Field

[0001] The invention relates to a ratchet clutch provided with a centrifugal block and a friction cam, which is mainly used in the field of transmission technology. Background Art

[0002] The ratchet clutch uses the interaction between the pawl and the ratchet wheel to selectively achieve the clutch of various forces or movements. Due to its simple structure and high load-bearing capacity, it is widely used in various transmission systems. The ratchet clutch can achieve clutching by itself, or it can achieve various clutching under the action of an external actuator. When the ratchet clutch is operating in a disengaged state or an overrunning state, especially when the ratchet clutch is used as an overrunning clutch, a one-way clutch or a one-way brake, the pawl and the ratchet wheel will continuously collide under the action of the spring, and vibration and noise will be generated, thereby increasing the noise in the operator's working environment. Therefore, how to reduce the noise between the pawl and the ratchet wheel in the disengaged state or the overrunning state has become a technical problem that needs to be solved in the field of ratchet clutches. Summary of the invention

[0003] In order to solve the above-mentioned technical problems existing in the ratchet clutch, the present invention aims to provide a ratchet clutch provided with a centrifugal block and a friction cam. The ratchet clutch provided with a centrifugal block and a friction cam is used to connect at least two parts of a machine, device, transmission system or mechanism, and / or to selectively realize the clutch of the power or movement of the moving part connected to the clutch by the interaction between the pawl and the ratchet wheel, and / or to selectively realize the deceleration, stop or keep the moving part connected to the clutch in a stopped state by the interaction between the pawl and the ratchet wheel.

[0004] The present invention is achieved through the following solutions:

[0005] The ratchet clutch provided with a centrifugal block and a friction cam comprises: a pawl, a ratchet, a return spring, a pawl seat, a friction cam, a separation spring, and a centrifugal block. The friction cam is arranged on the ratchet, and the friction cam is rotatable relative to the ratchet within a certain angle range. Or, the friction cam is arranged on the pawl seat, and the friction cam is rotatable relative to the pawl seat within a certain angle range. The return spring is connected to the pawl. When the friction cam is arranged on the ratchet, the pawl is arranged on the pawl seat, the friction cam is connected to the pawl, and the pawl is rotatable relative to the pawl seat within a certain angle range. When the friction cam is arranged on the pawl seat, the pawl is arranged on the pawl seat, the friction cam is connected to the pawl, and the pawl is rotatable relative to the pawl seat within a certain angle range. Or, when the friction cam is arranged on the pawl seat, the pawl is arranged on the friction cam, the pawl seat is connected to the pawl, and the pawl is rotatable relative to the friction cam within a certain angle range. The centrifugal block is arranged on the separation spring. When the friction cam is arranged on the ratchet wheel, under the action of the centrifugal force of the centrifugal block, the friction cam selectively interacts with the ratchet seat through the friction of the separation spring. Or, when the friction cam is arranged on the ratchet seat, under the action of the centrifugal force of the centrifugal block, the friction cam selectively interacts with the ratchet wheel through the friction of the separation spring. When the friction cam is arranged on the ratchet wheel, and when the rotation speed of the centrifugal block is less than a certain range, the friction cam interacts with the ratchet seat through the friction of the separation spring, and under the friction of the separation spring or the ratchet seat, the friction cam is rotatable relative to the ratchet wheel within a certain angle range, and under the action of the friction cam, the return spring and the ratchet, the ratchet seat and the ratchet wheel selectively realize clutch. When the friction cam is arranged on the ratchet wheel, and when the rotation speed of the centrifugal block is greater than a certain range, under the action of the centrifugal force of the centrifugal block, the separation spring is disengaged from the ratchet seat, or the separation spring is disengaged from the friction cam. When the friction cam is arranged on the pawl seat, and when the rotation speed of the centrifugal block is less than a certain range, the friction cam interacts with the ratchet wheel through the friction of the separation spring, and under the friction of the separation spring or the ratchet wheel, the friction cam is rotatable relative to the pawl seat within a certain angle range, and under the action of the friction cam, the return spring and the pawl, the pawl seat and the ratchet wheel are selectively engaged and disengaged. When the friction cam is arranged on the pawl seat, and when the rotation speed of the centrifugal block is greater than a certain range, under the action of the centrifugal force of the centrifugal block, the separation spring is disengaged from the ratchet wheel, or the separation spring is disengaged from the friction cam.The ratchet wheel and the pawl seat are respectively connected to external components, and the external components refer to components excluding "components of the ratchet clutch provided with a centrifugal block and a friction cam".

[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 separation spring includes a first separation spring 8. The centrifugal block includes a first centrifugal block 7. The first friction cam 5 is arranged on the first ratchet 2, and the first friction cam 5 is rotatable relative to the first ratchet 2 between a first limited angle and a second limited angle. The first return spring 3 is connected to the first pawl 1. When the first friction cam 5 is arranged on the first ratchet 2, the first pawl 1 is arranged on the first pawl seat 4, the first friction cam 5 is connected to the first pawl 1, and the first pawl 1 is rotatable relative to the first pawl seat 4 within a certain angle range. The first centrifugal block 7 is arranged on the first separation spring 8. When the first friction cam 5 is arranged on the first ratchet 2, the first separation spring 8 is arranged on the first friction cam 5. When the first friction cam 5 is arranged on the first ratchet 2, under the action of the centrifugal force of the first centrifugal block 7, the first friction cam 5 selectively interacts with the first pawl seat 4 through the friction of the first separation spring 8. When the first friction cam 5 is arranged on the first ratchet 2, and when the rotation speed of the first centrifugal block 7 is less than a certain range, the first friction cam 5 interacts with the first pawl seat 4 through the friction of the first separation spring 8, and under the friction of the first pawl seat 4, the first friction cam 5 can rotate relative to the first ratchet 2 between the first limited angle and the second limited angle. When the first friction cam 5 is arranged on the first ratchet 2, and when the first friction cam 5 rotates to the first limited angle position relative to the first ratchet 2, under the action of the first friction cam 5, the first return spring 3 and the first pawl 1, the first pawl seat 4 selectively engages with the first ratchet 2. When the first friction cam 5 is arranged on the first ratchet 2, and when the first friction cam 5 rotates to the second limited angle position relative to the first ratchet 2, under the action of the first friction cam 5, the first return spring 3 and the first pawl 1, the first pawl seat 4 is in a separated state from the first ratchet 2. When the first friction cam 5 is arranged on the first ratchet 2, and when the rotation speed of the first centrifugal block 7 is greater than a certain range, under the action of the centrifugal force of the first centrifugal block 7, the first separation spring 8 is disengaged from the first pawl seat 4. 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 separation spring includes a first separation spring 8. The centrifugal block includes a first centrifugal block 7. The first friction cam 5 is arranged on the first ratchet 2, and the first friction cam 5 is rotatable relative to the first ratchet 2 between a first limited angle and a second limited angle. The first return spring 3 is connected to the first pawl 1. When the first friction cam 5 is arranged on the first ratchet 2, the first pawl 1 is arranged on the first pawl seat 4, the first friction cam 5 is connected to the first pawl 1, and the first pawl 1 is rotatable relative to the first pawl seat 4 within a certain angle range. The first centrifugal block 7 is arranged on the first separation spring 8. When the first friction cam 5 is arranged on the first ratchet 2, the first separation spring 8 is arranged on the first pawl seat 4. When the first friction cam 5 is arranged on the first ratchet 2, under the action of the centrifugal force of the first centrifugal block 7, the first friction cam 5 selectively interacts with the first pawl seat 4 through the friction of the first separation spring 8. When the first friction cam 5 is arranged on the first ratchet 2, and when the rotation speed of the first centrifugal block 7 is less than a certain range, the first friction cam 5 interacts with the first pawl seat 4 through the friction of the first separation spring 8, and under the friction of the first separation spring 8, the first friction cam 5 can rotate relative to the first ratchet 2 between the first limited angle and the second limited angle. When the first friction cam 5 is arranged on the first ratchet 2, and when the first friction cam 5 rotates to the first limited angle position relative to the first ratchet 2, under the action of the first friction cam 5, the first return spring 3 and the first pawl 1, the first pawl seat 4 selectively engages with the first ratchet 2. When the first friction cam 5 is arranged on the first ratchet 2, and when the first friction cam 5 rotates to the second limited angle position relative to the first ratchet 2, under the action of the first friction cam 5, the first return spring 3 and the first pawl 1, the first pawl seat 4 is in a separated state from the first ratchet 2. When the first friction cam 5 is arranged on the first ratchet 2, and when the rotation speed of the first centrifugal block 7 is greater than a certain range, under the action of the centrifugal force of the first centrifugal block 7, the first separation spring 8 is disengaged from the first friction cam 5. The first ratchet 2 and the first pawl seat 4 are respectively connected to the external components.

[0008] 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 separation spring includes a first separation spring 8. The centrifugal block includes a first centrifugal block 7. The first friction cam 5 is 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. The first return spring 3 is connected to the first pawl 1. When the first friction cam 5 is arranged on the first pawl seat 4, the first pawl 1 is arranged on the first pawl seat 4, the first friction cam 5 is connected to the first pawl 1, and the first pawl 1 is rotatable relative to the first pawl seat 4 within a certain angle range. The first centrifugal block 7 is arranged on the first separation spring 8. When the first friction cam 5 is arranged on the first pawl seat 4, the first separation spring 8 is arranged on the first friction cam 5. When the first friction cam 5 is arranged on the first pawl seat 4, under the action of the centrifugal force of the first centrifugal block 7, the first friction cam 5 selectively interacts with the first ratchet 2 through the friction of the first separation spring 8. When the first friction cam 5 is arranged on the first pawl seat 4, and when the rotation speed of the first centrifugal block 7 is less than a certain range, the first friction cam 5 interacts with the first ratchet 2 through the friction of the first separation spring 8, and under the friction of the first ratchet 2, the first friction cam 5 can rotate relative to the first pawl seat 4 between the first limited angle and the second limited angle. When the first friction cam 5 is arranged on the first pawl seat 4, and when the first friction cam 5 rotates to the first limited angle position relative to the first pawl seat 4, under the action of the first friction cam 5, the first return spring 3 and the first pawl 1, the first pawl seat 4 selectively engages with the first ratchet 2. When the first friction cam 5 is arranged on the first pawl seat 4, and when the first friction cam 5 rotates to the second limited angle position relative to the first pawl seat 4, under the action of the first friction cam 5, the first return spring 3 and the first pawl 1, the first pawl seat 4 and the first ratchet 2 are in a separated state. When the first friction cam 5 is arranged on the first pawl seat 4, and when the rotation speed of the first centrifugal block 7 is greater than a certain range, under the action of the centrifugal force of the first centrifugal block 7, the first separation spring 8 is disengaged from the first ratchet 2. The first ratchet 2 and the first pawl seat 4 are respectively connected to the external components.

[0009] 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 separation spring includes a first separation spring 8. The centrifugal block includes a first centrifugal block 7. The first friction cam 5 is 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. The first return spring 3 is connected to the first pawl 1. When the first friction cam 5 is arranged on the first pawl seat 4, the first pawl 1 is arranged on the first pawl seat 4, the first friction cam 5 is connected to the first pawl 1, and the first pawl 1 is rotatable relative to the first pawl seat 4 within a certain angle range. The first centrifugal block 7 is arranged on the first separation spring 8. When the first friction cam 5 is arranged on the first pawl seat 4, the first separation spring 8 is arranged on the first ratchet 2. When the first friction cam 5 is arranged on the first pawl seat 4, under the action of the centrifugal force of the first centrifugal block 7, the first friction cam 5 selectively interacts with the first ratchet 2 through the friction of the first separation spring 8. When the first friction cam 5 is arranged on the first pawl seat 4, and when the rotation speed of the first centrifugal block 7 is less than a certain range, the first friction cam 5 interacts with the first ratchet 2 through the friction of the first separation spring 8, and under the friction of the first separation spring 8, the first friction cam 5 can rotate relative to the first pawl seat 4 between the first limited angle and the second limited angle. When the first friction cam 5 is arranged on the first pawl seat 4, and when the first friction cam 5 rotates to the first limited angle position relative to the first pawl seat 4, under the action of the first friction cam 5, the first return spring 3 and the first pawl 1, the first pawl seat 4 selectively engages with the first ratchet 2. When the first friction cam 5 is arranged on the first pawl seat 4, and when the first friction cam 5 rotates to the second limited angle position relative to the first pawl seat 4, under the action of the first friction cam 5, the first return spring 3 and the first pawl 1, the first pawl seat 4 and the first ratchet 2 are in a separated state. When the first friction cam 5 is arranged on the first pawl seat 4, and when the rotation speed of the first centrifugal block 7 is greater than a certain range, under the action of the centrifugal force of the first centrifugal block 7, the first separation spring 8 is disengaged from the first friction cam 5. The first ratchet 2 and the first pawl seat 4 are respectively connected to the external components.

[0010] 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 separation spring includes a first separation spring 8. The centrifugal block includes a first centrifugal block 7. The first friction cam 5 is 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. The first return spring 3 is connected to the first pawl 1. When the first friction cam 5 is arranged on the first pawl seat 4, the first pawl 1 is arranged on the first friction cam 5, the first pawl seat 4 is connected to the first pawl 1, and the first pawl 1 is rotatable relative to the first friction cam 5 within a certain angle range. The first centrifugal block 7 is arranged on the first separation spring 8. When the first friction cam 5 is arranged on the first pawl seat 4, the first separation spring 8 is arranged on the first friction cam 5. When the first friction cam 5 is arranged on the first pawl seat 4, under the action of the centrifugal force of the first centrifugal block 7, the first friction cam 5 selectively interacts with the first ratchet 2 through the friction of the first separation spring 8. When the first friction cam 5 is arranged on the first pawl seat 4, and when the rotation speed of the first centrifugal block 7 is less than a certain range, the first friction cam 5 interacts with the first ratchet 2 through the friction of the first separation spring 8, and under the friction of the first ratchet 2, the first friction cam 5 can rotate relative to the first pawl seat 4 between the first limited angle and the second limited angle. When the first friction cam 5 is arranged on the first pawl seat 4, and when the first friction cam 5 rotates to the first limited angle position relative to the first pawl seat 4, under the action of the first friction cam 5, the first return spring 3 and the first pawl 1, the first pawl seat 4 selectively engages with the first ratchet 2. When the first friction cam 5 is arranged on the first pawl seat 4, and when the first friction cam 5 rotates to the second limited angle position relative to the first pawl seat 4, under the action of the first friction cam 5, the first return spring 3 and the first pawl 1, the first pawl seat 4 and the first ratchet 2 are in a separated state. When the first friction cam 5 is arranged on the first pawl seat 4, and when the rotation speed of the first centrifugal block 7 is greater than a certain range, under the action of the centrifugal force of the first centrifugal block 7, the first separation spring 8 is disengaged from the first ratchet 2. The first ratchet 2 and the first pawl seat 4 are respectively connected to the external components.

[0011] 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 separation spring includes a first separation spring 8. The centrifugal block includes a first centrifugal block 7. The first friction cam 5 is 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. The first return spring 3 is connected to the first pawl 1. When the first friction cam 5 is arranged on the first pawl seat 4, the first pawl 1 is arranged on the first friction cam 5, the first pawl seat 4 is connected to the first pawl 1, and the first pawl 1 is rotatable relative to the first friction cam 5 within a certain angle range. The first centrifugal block 7 is arranged on the first separation spring 8. When the first friction cam 5 is arranged on the first pawl seat 4, the first separation spring 8 is arranged on the first ratchet 2. When the first friction cam 5 is arranged on the first pawl seat 4, under the action of the centrifugal force of the first centrifugal block 7, the first friction cam 5 selectively interacts with the first ratchet 2 through the friction of the first separation spring 8. When the first friction cam 5 is arranged on the first pawl seat 4, and when the rotation speed of the first centrifugal block 7 is less than a certain range, the first friction cam 5 interacts with the first ratchet 2 through the friction of the first separation spring 8, and under the friction of the first separation spring 8, the first friction cam 5 can rotate relative to the first pawl seat 4 between the first limited angle and the second limited angle. When the first friction cam 5 is arranged on the first pawl seat 4, and when the first friction cam 5 rotates to the first limited angle position relative to the first pawl seat 4, under the action of the first friction cam 5, the first return spring 3 and the first pawl 1, the first pawl seat 4 selectively engages with the first ratchet 2. When the first friction cam 5 is arranged on the first pawl seat 4, and when the first friction cam 5 rotates to the second limited angle position relative to the first pawl seat 4, under the action of the first friction cam 5, the first return spring 3 and the first pawl 1, the first pawl seat 4 and the first ratchet 2 are in a separated state. When the first friction cam 5 is arranged on the first pawl seat 4, and when the rotation speed of the first centrifugal block 7 is greater than a certain range, under the action of the centrifugal force of the first centrifugal block 7, the first separation spring 8 is disengaged from the first friction cam 5. The first ratchet 2 and the first pawl seat 4 are respectively connected to the external components.

[0012] Further, when the friction cam is arranged on the ratchet, and when the friction cam rotates to the first limited angle position relative to the ratchet, the ratchet has an angle positioning effect on the friction cam. When the friction cam is arranged on the ratchet, and when the friction cam rotates to the second limited angle position relative to the ratchet, the ratchet has an angle positioning effect on the friction cam. When the friction cam is arranged on the pawl seat, and when the friction cam rotates to the first limited angle position relative to the pawl seat, the pawl seat has an angle positioning effect on the friction cam. When the friction cam is arranged on the pawl seat, and when the friction cam rotates to the second limited angle position relative to the pawl seat, the pawl seat has an angle positioning effect on the friction cam.

[0013] Further, when the friction cam is arranged on the ratchet, the friction cam is rotatably arranged on the ratchet through a shaft hole clearance fit, or the friction cam is rotatably arranged on the ratchet through a bearing. When the friction cam is arranged on the pawl seat, the friction cam is rotatably arranged on the pawl seat through a shaft hole clearance fit, or the friction cam is rotatably arranged on the pawl seat through a bearing.

[0014] Further, when the pawl is arranged on the pawl seat, the pawl is rotatably arranged on the pawl seat through a shaft hole clearance fit, or the pawl is rotatably arranged on the pawl seat through a bearing. When the pawl is arranged on the friction cam, the pawl is rotatably arranged on the friction cam through a shaft hole clearance fit, or the pawl is rotatably arranged on the friction cam through a bearing.

[0015] Further, the pawl includes one or more parts. The ratchet includes one or more parts. The return spring includes one or more parts. The pawl seat includes one or more parts. The friction cam includes one or more parts. The separation spring includes one or more parts. The centrifugal block includes one or more parts. The first pawl 1 includes one or more parts. The first ratchet 2 includes one or more parts. The first return spring 3 includes one or more parts. The first pawl seat 4 includes one or more parts. The first friction cam 5 includes one or more parts. The first separation spring 8 includes one or more parts. The first centrifugal block 7 includes one or more parts.

[0016] Further, the centrifugal block is arranged on the separation spring by riveting or bolting, etc. Or, the centrifugal block is movably arranged on the separation spring by sliding groove or hinge, etc.

[0017] Further, the centrifugal block is one or more single solid parts. Or, the centrifugal block is one or more steel ball aggregates (a certain number of small steel balls are set in a rigid container, or a certain number of small steel balls are set in a flexible package). Or, the centrifugal block is one or more particle aggregates (a certain mass of particles are set in a rigid container, or a certain mass of particles are set in a flexible package). Or, the centrifugal block is one or more powder aggregates (a certain mass of powdered objects are set in a rigid container, or a certain mass of powdered objects are set in a flexible package). Or, the centrifugal block is one or more liquid aggregates (a certain mass of liquid is set in a rigid container, or a certain mass of liquid is set in a flexible package).

[0018] Compared with the prior art, the ratchet clutch provided with the centrifugal block and the friction cam of the present invention can reduce the operating noise between the ratchet pawl and the ratchet wheel in the separated state.

[0019] The above-mentioned features and advantages of the present invention, as well as other features and advantages, will be easily understood from the following detailed description of the best mode for implementing the present invention in conjunction with the accompanying drawings. However, it should be clearly understood that all the accompanying drawings are only for description and are not intended to limit the definition and scope of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figures 1 to 30 It is a schematic diagram of the structure of embodiments 1 to 3. Wherein:

[0021] Figure 1 -Schematic diagram of the 3D structure of Example 1 in the joined state.

[0022] Figure 2 - Schematic diagram of the 3D cross-section structure and the partial enlarged schematic diagram of Example 1 in the joined state.

[0023] Figure 3 - Schematic diagram of the 3D structure explosion of Example 1 in the joined state (two viewing angles).

[0024] Figure 4 -Front view and partial enlarged schematic diagram of Example 1 in the engaged state.

[0025] Figure 5 - Schematic diagram of radial section and partial enlargement of Example 1 in the engaged state.

[0026] Figure 6 -Partial 3D cross-sectional schematic diagram and partial enlarged schematic diagram of Example 1 in the joined state.

[0027] Figure 7 -Front view and partial enlarged schematic diagram of Example 1 in the separated state.

[0028] Figure 8 - Schematic diagram of radial section and partial enlargement of Example 1 in the separated state.

[0029] Fig. 9 - A partial 3D cutaway schematic diagram and a partial enlarged schematic diagram of Example 1 in a separated state.

[0030] Fig.10 -3D cross-sectional structural diagram and partial enlarged diagram of Example 1 when the separation spring and the friction cam are out of contact.

[0031] Fig.11 -Front view and partial enlarged schematic diagram of Example 1 when the separation spring and the friction cam are out of contact.

[0032] Fig.12 -Schematic diagram of the 3D structure of Example 2 in the joined state.

[0033] Fig.13 - Schematic diagram of the 3D cross-section structure and the partial enlarged schematic diagram of Example 2 in the joined state.

[0034] Fig.14 - Schematic diagram of the 3D structure explosion in the bonding state of Example 2 (two perspectives).

[0035] Fig.15 -Front view and partial enlarged schematic diagram of Example 2 in the engaged state.

[0036] Fig.16 - Schematic diagram of radial section and partial enlargement of Example 2 in the engaged state.

[0037] Fig.17 - Schematic diagram of the 3D cross-section structure of Example 2 in the separated state and a partial enlarged schematic diagram.

[0038] Fig.18 -Front view and partial enlarged schematic diagram of Example 2 in the separated state.

[0039] Fig.19 -3D cross-sectional structural diagram and partial enlarged diagram of Example 2 when the separation spring and the friction cam are out of contact.

[0040] Fig. 20 -Front view and partial enlarged schematic diagram of Example 2 when the separation spring and the friction cam are out of contact.

[0041] Fig.21 - Schematic diagram of the 3D structure of Example 3 in the joined state and a partially enlarged schematic diagram.

[0042] Fig. 22- Schematic diagram of the 3D cross-section structure and the partial enlarged diagram of Example 3 in the joined state.

[0043] Fig.23 - Schematic diagram of the exploded view of the 3D structure of Example 3 in the joined state (two viewing angles) and a partial enlarged schematic diagram.

[0044] Fig.24 -Front view and partial enlarged schematic diagram of Example 3 in the engaged state.

[0045] Fig.25 - Schematic diagram of radial section and partial enlargement of Example 3 in the engaged state.

[0046] Fig.26 -Front view and partial enlarged schematic diagram of Example 3 in the separated state.

[0047] Fig. 27 - Schematic diagram of radial section and partial enlargement of Example 3 in the separated state.

[0048] Fig.28 - Schematic diagram of the 3D cross-section structure of Example 3 in the separated state and a partial enlarged schematic diagram.

[0049] Fig.29 -3D cross-sectional structural diagram and partial enlarged diagram of Example 3 when the separation spring and the friction cam are out of contact.

[0050] Fig.30 -Front view and partial enlarged schematic diagram of Example 3 when the separation spring and the friction cam are out of contact.

[0051] Markings in the figure: 1-first pawl, 2-first ratchet, 3-first return spring, 4-first pawl seat, 5-first friction cam, 7-first centrifugal block, 8-first separation spring, 9-first rivet, 10-second rivet, 12-radial convex teeth of the first friction cam 5, 13-radial tooth grooves of the first ratchet 2, 14-grooves of the first pawl seat 4, 15-grooves of the first pawl 1, 16-ratchet grooves of the first ratchet 2, 17-axial notches of the first friction cam 5, 18-tooth top surfaces of the first ratchet 2, 1 9-tooth top surface of the first friction cam 5, 20-first retaining spring, 21-groove of the first ratchet 2, 22-riveted boss of the first pawl 1, 24-blocking arm of the first pawl 1, 25-radial tooth groove of the first pawl seat 4, 26-first separation spring bracket, 27-first friction pad, 28-axial boss of the first pawl seat 4, 29-first positioning boss, 30-first positioning groove, 31-second positioning groove, 51-first cam bracket, 52-second cam bracket, 53-radial convex teeth of the first cam bracket 51.

[0052] For ease of description, the rotation direction indicated by the arrow in the figure is the positive rotation direction adopted by the corresponding embodiment. DETAILED DESCRIPTION

[0053] The present invention is further described below in conjunction with the accompanying drawings and examples, but the present invention is not limited to the description of the examples. Obviously, what is described is only a part of the preferred embodiments of the present invention, not all embodiments. It is easy for a person skilled in the art to make many changes based on the principles of the invention, so the present invention is not fixed to the details shown and described, but is intended to include all changes and modifications within the scope of the claims.

[0054] The terms used herein are only used for the purpose of describing specific exemplary embodiments and are not intended to be limiting. As used herein, the singular forms "one", "an", etc. may also be intended to include plural forms unless the context clearly indicates otherwise. The terms "including" and "having" are inclusive, and therefore specify the presence of the features, wholes, steps, operations, parts, components, parts and / or assemblies, but do not exclude the presence or increase of one or more other features, wholes, steps, operations, parts, components, parts, assemblies and / or their combinations. The method steps, procedures and operations described herein should not be understood as necessarily requiring the method steps, procedures and operations to be performed in the specific order discussed or described, unless specifically identified as an execution order. It should also be understood that additional or alternative steps may be adopted.

[0055] Although 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 only be used to distinguish a part, component, part, assembly, layer and / or portion. Terms such as "first", "second", "third" and other numerical terms do not imply an order or sequence when used herein unless the context clearly indicates.

[0056] The “axial direction” in the embodiments refers to the axial direction of the ratchet clutch provided with the centrifugal block and the friction cam, and the “radial direction” in the embodiments refers to the radial direction of the ratchet clutch provided with the centrifugal block and the friction cam, unless the context clearly indicates otherwise.

[0057] Example 1

[0058] A ratchet clutch with a centrifugal block and a friction cam, such as Figures 1 to 11 As shown, it includes a first pawl 1, a first ratchet wheel 2, a first return spring 3, a first pawl seat 4, a first friction cam 5, a first centrifugal block 7, a first separation spring 8, a first rivet 9, a second rivet 10, and a first retaining spring 20.

[0059] The first ratchet 2 and the first friction cam 5 are coaxially arranged 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 "components of the ratchet clutch provided with centrifugal blocks and friction cams") through splines. Optionally, in order to ensure a certain degree of coaxiality between the first ratchet 2 and the first friction cam 5, the first ratchet 2 can also be rotatably set on the first pawl seat 4 through a bearing (refer to the Chinese invention patent with application number 2021100587947).

[0060] The first friction cam 5 is arranged on the first ratchet 2 through the clearance fit of the shaft hole, and the first friction cam 5 is rotatable relative to the first ratchet 2. Optionally, in order to reduce the friction resistance of the first friction cam 5, the first friction cam 5 can also be rotatably arranged on the first ratchet 2 through a bearing (refer to the Chinese invention patent with application number 2021100587947). The radial protruding teeth 12 of the first friction cam 5 cooperate with the radial tooth grooves 13 of the first ratchet 2, so that the first friction cam 5 can rotate relative to the first ratchet 2 between a first limited angle and a second limited angle.

[0061] The first centrifugal block 7 is arranged on the first separation spring 8 through the second rivet 10. The first separation spring 8 has a certain elasticity. The first separation spring 8 is arranged on the first pawl seat 4 through the first rivet 9. When the rotation speed of the first centrifugal block 7 is less than a certain range, the centrifugal action of the first centrifugal block 7 is less than the elastic action of the first separation spring 8. Under the elastic action of the first separation spring 8, the first separation spring 8 interacts with the first friction cam 5 through friction. When the rotation speed of the first centrifugal block 7 is greater than a certain range, the centrifugal action of the first centrifugal block 7 is greater than the elastic action of the first separation spring 8. Under the centrifugal action of the first centrifugal block 7, the first separation spring 8 is disengaged from the first friction cam 5. Thus, under the centrifugal action of the first centrifugal block 7, the first friction cam 5 selectively interacts with the first pawl seat 4 through the friction of the first separation spring 8.

[0062] When the rotation speed of the first centrifugal block 7 is less than a certain range, the first pawl seat 4 interacts with the first friction cam 5 through the friction of the first separation spring 8. That is, when the rotation speed of the first centrifugal block 7 is less than a certain range, the first pawl seat 4 and the first friction cam 5 indirectly interact with each other through the friction between the first separation spring 8 and the first friction cam 5.

[0063] Furthermore, when the first separation spring 8 interacts with the first friction cam 5 through friction, and when the first friction cam 5 rotates between the first limited angle and the second limited angle relative to the first ratchet 2, in a manner known in the art (e.g., reasonable design or reasonable selection of friction coefficients between different friction surfaces, etc.), the friction effect of the first separation spring 8 on the first friction cam 5 is greater than the friction resistance of other components on the first friction cam 5. In this way, when the rotation speed of the first centrifugal block 7 is less than a certain range, under the friction effect of the first separation spring 8, the first friction cam 5 can rotate between the first limited angle and the second limited angle relative to the first ratchet 2.

[0064] The first retaining spring 20 is disposed in the groove 21 of the first ratchet 2 . Under the action of the first retaining spring 20 , the first friction cam 5 is fixed relative to the first ratchet 2 in the axial direction.

[0065] The first return spring 3 has a certain elasticity. Under the elastic force of the first return spring 3, the first pawl 1 is arranged on the first pawl seat 4 through the axial hole clearance fit, and within a certain angle range, the first pawl 1 can rotate relative to the first pawl seat 4. The first return spring 3 is arranged in the groove 14 of the first pawl seat 4 and in the groove 15 of the first pawl 1, so that under the action of the first return spring 3, the first pawl 1 is fixed relative to the first pawl seat 4 in the axial direction.

[0066] The first friction cam 5 interacts with the first pawl 1 through contact. When the first friction cam 5 rotates to the first limited angle position relative to the first ratchet 2, under the action of the first return spring 3, the first pawl 1, and the first friction cam 5, the first pawl seat 4 and the first ratchet 2 are selectively engaged and disengaged. When the first friction cam 5 rotates to the first limited angle position relative to the first ratchet 2, the first pawl seat 4 selectively transmits the power or movement of the first pawl seat 4 to the first ratchet 2, or the first ratchet 2 selectively transmits the power or movement of the first ratchet 2 to the first pawl seat 4. When the first friction cam 5 rotates to the second limited angle position relative to the first ratchet 2, under the action of the first return spring 3, the first pawl 1, and the first friction cam 5, the first pawl seat 4 and the first ratchet 2 are in a separated state.

[0067] Preferably, in the initial state, the first friction cam 5 is at the first limited angle position relative to the first ratchet 2, and the first pawl seat 4 is in an engaged state with the first ratchet 2. Figures 1 to 6At 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 rotation speed of the first centrifugal block 7 is less than a certain range, and when the first ratchet 2 rotates forward relative to the first pawl seat 4 (the rotation direction indicated by the arrow in the figure), under the friction effect of the first separation spring 8, the first friction cam 5 can rotate relative to the first ratchet 2 to the second limited angle position.

[0068] like Figures 7 to 9 As shown, when the first friction cam 5 rotates to the second limited angle position relative to the first ratchet 2, the first pawl seat 4 is in a separated state from the first ratchet 2, and the first ratchet 2 can rotate relative to the first pawl seat 4 in the forward direction (the rotation direction indicated by the arrow in the figure). When the rotation speed of the first centrifugal block 7 is less than a certain range, and when the first ratchet 2 rotates reversely relative to the first pawl seat 4 (opposite to the rotation direction indicated by the arrow in the figure), under the friction effect of the first separation spring 8, the first friction cam 5 can rotate to the first limited angle position relative to the first ratchet 2.

[0069] like Figures 10-11 As shown, when the first friction cam 5 rotates to the second limited angle position relative to the first ratchet 2, the first pawl seat 4 is in a separated state from the first ratchet 2, and the first ratchet 2 can rotate relative to the first pawl seat 4 in the forward direction (the rotation direction indicated by the arrow in the figure). When the rotation speed of the first centrifugal block 7 is greater than a certain range, the centrifugal effect of the first centrifugal block 7 is greater than the elastic effect of the first separation spring 8, and under the centrifugal effect of the first centrifugal block 7, the first separation spring 8 is out of contact with the first friction cam 5.

[0070] When the first friction cam 5 rotates to the first limited angle position relative to the first ratchet 2, and when the first ratchet 2 reverses or has a reverse motion tendency relative to the first pawl seat 4, the first pawl seat 4 selectively engages with the first ratchet 2, and the first ratchet 2 can be fixed relative to the first pawl seat 4 in the reverse direction. Figure 6 As shown, when the first friction cam 5 rotates to the first limited angle position relative to the first ratchet 2, and when the first ratchet 2 reverses or has a tendency to reverse relative to the first pawl seat 4, and when the first pawl seat 4 and the first ratchet 2 are in an engaged state, the ratchet groove 16 of the first ratchet 2 and the axial groove 17 of the first friction cam 5 are engaged with the first pawl 1, and the first ratchet 2 and the first friction cam 5 are fixed relative to the first pawl seat 4 in the reversing direction.

[0071] When the first friction cam 5 rotates to the second limited angle position relative to the first ratchet wheel 2, and when the first ratchet wheel 2 rotates forward relative to the first pawl seat 4, Fig. 9 As shown, the tooth top surface 19 of the first friction cam 5 and the tooth top surface 18 of the first ratchet 2 are axially spliced ​​into a cylindrical surface, and the first pawl 1 is in contact with the spliced ​​cylindrical surface, thereby avoiding the continuous collision between the pawl and the ratchet. Although at this time, there is friction noise between the pawl and the spliced ​​cylindrical surface, and when the rotation speed of the first centrifugal block 7 is less than a certain range, there is also friction noise between the first friction cam 5 and the first separation spring 8, but compared with the continuous collision noise generated between the pawl and the ratchet in the traditional ratchet one-way clutch in the separated state, the former (friction noise between friction pairs) is significantly lower than the latter (the continuous collision noise between the pawl and the ratchet between the mating pairs). Further, when the first friction cam 5 rotates to the second limited angle position relative to the first ratchet 2, and when the rotation speed of the first centrifugal block 7 is greater than a certain range, the first separation spring 8 is disengaged from the first friction cam 5, as shown in FIG. Figures 10-11 As shown, at this time, the friction noise between the first friction cam 5 and the first separation spring 8 can be further avoided.

[0072] The first friction cam 5 and the first separation spring 8 interact with each other through friction, and after long-term operation, certain wear will inevitably occur. However, since the first separation spring 8 has a certain elastic deformation ability, the contact pressure between the first friction cam 5 and the first separation spring 8 can be stably maintained within a certain range within a certain use time range, and the wear between the first friction cam 5 and the first separation spring 8 can be compensated to a certain extent, thereby ensuring that there is a relatively stable friction effect between the first friction cam 5 and the first separation spring 8 within a certain use time range.

[0073] Example 2

[0074] A ratchet clutch with a centrifugal block and a friction cam, such as Figures 12 to 20 As shown, it includes a first pawl 1, a first ratchet wheel 2, a first return spring 3, a first pawl seat 4, a first friction cam 5, a first centrifugal block 7, a first separation spring 8, a first rivet 9, and a second rivet 10.

[0075] The first ratchet 2 and the first friction cam 5 are coaxially arranged 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 "components of the ratchet clutch provided with centrifugal blocks and friction cams") through splines. Optionally, in order to ensure a certain degree of coaxiality between the first ratchet 2 and the first friction cam 5, the first ratchet 2 can also be rotatably set on the first pawl seat 4 through a bearing (refer to the Chinese invention patent with application number 2021100587947).

[0076] The first friction cam 5 is arranged on the first pawl seat 4 through the clearance fit of the shaft hole, and the first friction cam 5 is rotatable relative to the first pawl seat 4. Optionally, in order to reduce the friction resistance of the first friction cam 5, the first friction cam 5 can also be rotatably arranged on the first pawl seat 4 through a bearing (refer to the Chinese invention patent with application number 2021100587947). The radial protruding teeth 12 of the first friction cam 5 cooperate with the radial tooth grooves 25 of the first pawl seat 4, so that the first friction cam 5 can rotate relative to the first pawl seat 4 between a first limited angle and a second limited angle.

[0077] The first centrifugal block 7 is arranged on the first separation spring 8 through the second rivet 10. The first separation spring 8 has a certain elasticity. The first separation spring 8 is arranged on the first friction cam 5 through the first rivet 9. When the rotation speed of the first centrifugal block 7 is less than a certain range, the centrifugal action of the first centrifugal block 7 is less than the elastic action of the first separation spring 8. Under the elastic action of the first separation spring 8, the first separation spring 8 interacts with the first ratchet 2 through friction. When the rotation speed of the first centrifugal block 7 is greater than a certain range, the centrifugal action of the first centrifugal block 7 is greater than the elastic action of the first separation spring 8. Under the centrifugal action of the first centrifugal block 7, the first separation spring 8 is disengaged from the first ratchet 2. Thus, under the centrifugal action of the first centrifugal block 7, the first friction cam 5 selectively interacts with the first ratchet 2 through the friction of the first separation spring 8.

[0078] When the rotation speed of the first centrifugal weight 7 is less than a certain range, the first ratchet wheel 2 interacts with the first friction cam 5 through the friction of the first separation spring 8. That is, when the rotation speed of the first centrifugal weight 7 is less than a certain range, the first ratchet wheel 2 and the first friction cam 5 indirectly interact with each other through the friction between the first separation spring 8 and the first ratchet wheel 2.

[0079] Furthermore, when the first separation spring 8 interacts with the first ratchet 2 through friction, and when the first friction cam 5 rotates between the first limited angle and the second limited angle relative to the first pawl seat 4, in a manner known in the art (e.g., reasonable design or reasonable selection of friction coefficients between different friction surfaces, etc.), the friction effect of the first ratchet 2 on the first separation spring 8 is greater than the friction resistance of other components on the first friction cam 5. In this way, when the rotation speed of the first centrifugal block 7 is less than a certain range, under the friction effect of the first ratchet 2, the first separation spring 8 drives the first friction cam 5 to rotate, so that the first friction cam 5 can rotate between the first limited angle and the second limited angle relative to the first pawl seat 4.

[0080] Under the action of the blocking arm 24 of the first pawl 1 , the first friction cam 5 is fixed relative to the first pawl seat 4 in the axial direction.

[0081] The first return spring 3 has a certain elasticity. Under the elastic force of the first return spring 3, the first pawl 1 is arranged on the first pawl seat 4 through the axial hole clearance fit, and within a certain angle range, the first pawl 1 can rotate relative to the first pawl seat 4. The first return spring 3 is arranged in the groove 14 of the first pawl seat 4 and in the groove 15 of the first pawl 1, so that under the action of the first return spring 3, the first pawl 1 is fixed relative to the first pawl seat 4 in the axial direction.

[0082] The first friction cam 5 interacts with the first pawl 1 through contact. When the first friction cam 5 rotates to the first limited angle position relative to the first pawl seat 4, under the action of the first return spring 3, the first pawl 1, and the first friction cam 5, the first pawl seat 4 and the first ratchet 2 are selectively engaged and disengaged. When the first friction cam 5 rotates to the first limited angle position relative to the first pawl seat 4, the first pawl seat 4 selectively transmits the power or movement of the first pawl seat 4 to the first ratchet 2, or the first ratchet 2 selectively transmits the power or movement of the first ratchet 2 to the first pawl seat 4. When the first friction cam 5 rotates to the second limited angle position relative to the first pawl seat 4, under the action of the first return spring 3 and the first friction cam 5, the first pawl 1 is disengaged from the first ratchet 2, and the first pawl seat 4 and the first ratchet 2 are in a separated state.

[0083] Preferably, in the initial state, the first friction cam 5 is at the first limited angle position relative to the first pawl seat 4, and the first pawl seat 4 is in an engaged state with the first ratchet wheel 2. Figures 12 to 16 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 rotation speed of the first centrifugal block 7 is less than a certain range, and when the first ratchet 2 rotates forward relative to the first pawl seat 4 (the rotation direction indicated by the arrow in the figure), under the friction of the first ratchet 2, the first separation spring 8 drives the first friction cam 5 to rotate, and the first friction cam 5 can rotate relative to the first pawl seat 4 to the second limited angle position.

[0084] like Figures 17-18 As shown, when the first friction cam 5 rotates to the second limited angle position relative to the first pawl seat 4, under the action of the first return spring 3 and the first friction cam 5, the first pawl 1 is disengaged from the first ratchet 2, and the first pawl seat 4 is in a separated state from the first ratchet 2, and the first ratchet 2 can rotate relative to the first pawl seat 4 in the forward direction (the rotation direction indicated by the arrow in the figure). When the rotation speed of the first centrifugal block 7 is less than a certain range, and when the first ratchet 2 reverses 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 separation spring 8 drives the first friction cam 5 to rotate, so that the first friction cam 5 can rotate relative to the first pawl seat 4 to the first limited angle position.

[0085] like Figures 19-20 As shown, when the first friction cam 5 rotates to the second limited angle position relative to the first pawl seat 4, the first pawl 1 is disengaged from the first ratchet 2, the first pawl seat 4 is in a separated state from the first ratchet 2, and the first ratchet 2 can rotate relative to the first pawl seat 4 in the forward direction (the direction of rotation indicated by the arrow in the figure). When the rotation speed of the first centrifugal block 7 is greater than a certain range, the centrifugal action of the first centrifugal block 7 is greater than the elastic action of the first separation spring 8, and under the centrifugal action of the first centrifugal block 7, the first separation spring 8 is disengaged from the first ratchet 2.

[0086] When the first friction cam 5 rotates to the first limited angle position relative to the first pawl seat 4, and when the first ratchet 2 reverses or has a reverse motion tendency relative to the first pawl seat 4, the first pawl seat 4 selectively engages with the first ratchet 2, and the first ratchet 2 can be fixed relative to the first pawl seat 4 in the reverse direction. Figures 15-16 As shown, when the first pawl seat 4 is in an engaged state with the first ratchet 2, the first ratchet 2 is fixed relative to the first pawl seat 4 in the reverse direction.

[0087] When the first friction cam 5 rotates to the second limited angle position relative to the first pawl seat 4, and when the first ratchet wheel 2 rotates forward relative to the first pawl seat 4, Figures 17-18 As shown, under the action of the first return spring 3 and the first friction cam 5, the first pawl 1 is disengaged from the first ratchet 2, thereby avoiding the continuous collision between the pawl and the ratchet. Although when the rotation speed of the first centrifugal block 7 is less than a certain range, there is also friction noise between the first ratchet 2 and the first separation spring 8, but compared with the continuous collision noise generated between the pawl and the ratchet in the traditional ratchet one-way clutch in the separated state, the former (friction noise between friction pairs) is significantly lower than the latter (the continuous collision noise between the pawl and the ratchet between the mating pairs). In addition, when the first friction cam 5 rotates to the second limited angle position relative to the first pawl seat 4, and when the rotation speed of the first centrifugal block 7 is greater than a certain range, the first separation spring 8 is disengaged from the first ratchet 2, as shown in FIG. Figures 19-20 As shown, at this time, the friction noise between the first ratchet wheel 2 and the first separation spring 8 can be further avoided.

[0088] The first ratchet 2 and the first separation spring 8 interact with each other through friction, and after long-term operation, certain wear will inevitably occur. However, since the first separation spring 8 has a certain elastic deformation ability, the contact pressure between the first ratchet 2 and the first separation spring 8 can be stably maintained within a certain range within a certain use time range, and the wear between the first ratchet 2 and the first separation spring 8 can be compensated to a certain extent, thereby ensuring that there is a relatively stable friction effect between the first ratchet 2 and the first separation spring 8 within a certain use time range.

[0089] Example 3

[0090] A ratchet clutch with a centrifugal block and a friction cam, such as Figures 21 to 30 As shown, it includes a first pawl 1, a first ratchet wheel 2, a first return spring 3, a first pawl seat 4, a first friction cam 5, a first centrifugal block 7, a first separation spring 8, a first rivet 9, and a second rivet 10.

[0091] The first friction cam 5 includes a first cam bracket 51 and a second cam bracket 52. Under the action of the first pawl 1, the first cam bracket 51 and the second cam bracket 52 are connected to each other as a whole (i.e., the first friction cam 5). The first separation spring 8 includes a first separation spring bracket 26 and a first friction pad 27. Under the action of the second rivet 10, the first separation spring bracket 26 and the first friction pad 27 are connected to each other as a whole (i.e., the first separation spring 8).

[0092] like Fig.23 As shown, the first cam bracket 51 is provided with a first positioning boss 29, and the first pawl seat 4 is provided with a first positioning groove 30 and a second positioning groove 31. The number of the first positioning boss 29, the first positioning groove 30 and the second positioning groove 31 can be set according to actual working conditions.

[0093] The first ratchet 2 and the first friction cam 5 are coaxially arranged 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 "components of the ratchet clutch provided with centrifugal blocks and friction cams") through splines. Optionally, in order to ensure a certain degree of coaxiality between the first ratchet 2 and the first friction cam 5, the first ratchet 2 can also be rotatably set on the first pawl seat 4 through a bearing (refer to the Chinese invention patent with application number 2021100587947).

[0094] The first cam bracket 51 and the axial boss 28 of the first pawl seat 4 are matched with an axial hole clearance, so that the first friction cam 5 is rotatably set on the first pawl seat 4. Optionally, in order to reduce the friction resistance of the first friction cam 5, the first cam bracket 51 can also be rotatably set on the first pawl seat 4 through a bearing (refer to the Chinese invention patent with application number 2021100587947). The radial convex teeth 53 of the first cam bracket 51 cooperate with the axial boss 28 of the first pawl seat 4, so that the first friction cam 5 can rotate between the first limited angle and the second limited angle relative to the first pawl seat 4. The first cam bracket 51 and the second cam bracket 52 interact with the first pawl seat 4 respectively through contact, and under the action of the riveted boss 22 of the first pawl 1, the first friction cam 5 is fixed relative to the first pawl seat 4 in the axial direction.

[0095] The first centrifugal block 7 is arranged on the first separation spring bracket 26 through the second rivet 10, that is, the first centrifugal block 7 is arranged on the first separation spring 8 through the second rivet 10. The first separation spring bracket 26 has a certain elasticity. The first separation spring bracket 26 is arranged on the first cam bracket 51 through the first rivet 9, that is, the first separation spring 8 is arranged on the first friction cam 5 through the first rivet 9. When the rotation speed of the first centrifugal block 7 is less than a certain range, the centrifugal action of the first centrifugal block 7 is less than the elastic action of the first separation spring bracket 26, and under the elastic action of the first separation spring bracket 26, the first friction pad 27 and the first ratchet 2 interact with each other through friction. The first friction pad 27 has a certain wear resistance. When the rotation speed of the first centrifugal block 7 is greater than a certain range, the centrifugal action of the first centrifugal block 7 is greater than the elastic action of the first separation spring bracket 26, and under the centrifugal action of the first centrifugal block 7, the first separation spring 8 is out of contact with the first ratchet 2. Therefore, under the centrifugal action of the first centrifugal block 7, the first friction cam 5 selectively interacts with the first ratchet 2 through the friction of the first separation spring 8.

[0096] When the rotation speed of the first centrifugal weight 7 is less than a certain range, the first ratchet wheel 2 interacts with the first friction cam 5 through the friction of the first separation spring 8. That is, when the rotation speed of the first centrifugal weight 7 is less than a certain range, the first ratchet wheel 2 and the first friction cam 5 indirectly interact with each other through the friction between the first separation spring 8 and the first ratchet wheel 2.

[0097] Furthermore, when the first separation spring 8 interacts with the first ratchet 2 through friction, and when the first friction cam 5 rotates between the first limited angle and the second limited angle relative to the first pawl seat 4, in a manner known in the art (e.g., reasonable design or reasonable selection of friction coefficients between different friction surfaces, etc.), the friction effect of the first ratchet 2 on the first separation spring 8 is greater than the friction resistance of other components on the first friction cam 5. In this way, when the rotation speed of the first centrifugal block 7 is less than a certain range, under the friction effect of the first ratchet 2, the first separation spring 8 drives the first friction cam 5 to rotate, so that the first friction cam 5 can rotate between the first limited angle and the second limited angle relative to the first pawl seat 4.

[0098] The first return spring 3 has a certain elasticity. The first return spring 3 is arranged on the first cam bracket 51, and the first return spring 3 is connected to the first pawl 1. The first pawl 1 is arranged on the first friction cam 5 with a clearance fit through the shaft hole. Under the elastic force of the first return spring 3, the first pawl 1 can rotate relative to the first friction cam 5 within a certain angle range. Moreover, under the action of the riveted boss 22 of the first pawl 1, the first pawl 1 is fixed relative to the first friction cam 5 in the axial direction.

[0099] The first pawl seat 4 interacts with the first pawl 1 through contact. When the first friction cam 5 rotates to the first limited angle position relative to the first pawl seat 4, under the action of the first return spring 3, the first pawl 1, and the first friction cam 5, the first pawl seat 4 and the first ratchet 2 are selectively engaged and disengaged. When the first friction cam 5 rotates to the first limited angle position relative to the first pawl seat 4, the first pawl seat 4 selectively transmits the power or movement of the first pawl seat 4 to the first ratchet 2, or the first ratchet 2 selectively transmits the power or movement of the first ratchet 2 to the first pawl seat 4. When the first friction cam 5 rotates to the second limited angle position relative to the first pawl seat 4, under the action of the first return spring 3 and the first friction cam 5, the first pawl 1 is disengaged from the first ratchet 2, and the first pawl seat 4 and the first ratchet 2 are in a separated state.

[0100] Furthermore, when the first friction cam 5 is at the first limited angle position relative to the first pawl seat 4, the first pawl seat 4 has a certain angle positioning effect on the first friction cam 5 through the interaction between the first positioning boss 29 and the first positioning groove 30. Optionally, when the first friction cam 5 is at the first limited angle position relative to the first pawl seat 4, the first pawl seat 4 and the first friction cam 5 can also achieve a positioning function through other known methods (refer to the Chinese invention patent with application number 2021100587947). At this time, even if there is a certain external interference or power impact, the first friction cam 5 still remains at the first limited angle position relative to the first pawl seat 4. Therefore, through the interaction between the first positioning boss 29 and the first positioning groove 30, the ratchet clutch provided with the centrifugal block and the friction cam has a certain shifting reliability and stability at the first limited angle position.

[0101] Similarly, when the first friction cam 5 is in the second limited angle position relative to the first pawl seat 4, the first pawl seat 4 has a certain angle positioning effect on the first friction cam 5 through the interaction between the first positioning boss 29 and the second positioning groove 31. Optionally, when the first friction cam 5 is in the second limited angle position relative to the first pawl seat 4, the first pawl seat 4 and the first friction cam 5 can also achieve a positioning function through other known methods (refer to the Chinese invention patent with application number 2021100587947). At this time, even if there is a certain external interference or power impact, the first friction cam 5 still remains in the second limited angle position relative to the first pawl seat 4. Therefore, through the interaction between the first positioning boss 29 and the second positioning groove 31, the ratchet clutch provided with the centrifugal block and the friction cam has a certain shifting reliability and stability at the second limited angle position.

[0102] Preferably, in the initial state, the first friction cam 5 is at the first limited angle position relative to the first pawl seat 4, and the first pawl seat 4 is in an engaged state with the first ratchet wheel 2. Figures 21 to 25 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 rotation speed of the first centrifugal block 7 is less than a certain range, and when the first ratchet 2 rotates forward relative to the first pawl seat 4 (the rotation direction indicated by the arrow in the figure), under the friction of the first ratchet 2, the first friction pad 27 drives the first friction cam 5 to rotate through the first separation spring bracket 26, so that the first friction cam 5 can rotate relative to the first pawl seat 4 to the second limited angle position.

[0103] like Figures 26-28 As shown, when the first friction cam 5 rotates to the second limited angle position relative to the first pawl seat 4, under the action of the first return spring 3 and the first pawl seat 4, the first pawl 1 is disengaged from the first ratchet 2, and the first pawl seat 4 is in a separated state from the first ratchet 2, and the first ratchet 2 can rotate relative to the first pawl seat 4 in the forward direction (the rotation direction indicated by the arrow in the figure). When the rotation speed of the first centrifugal block 7 is less than a certain range, and when the first ratchet 2 is reversed 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 pad 27 drives the first friction cam 5 to rotate through the first separation spring bracket 26, so that the first friction cam 5 can rotate to the first limited angle position relative to the first pawl seat 4.

[0104] like Figures 29-30 As shown, when the first friction cam 5 rotates to the second limited angle position relative to the first pawl seat 4, the first pawl 1 is disengaged from the first ratchet 2, the first pawl seat 4 is in a separated state from the first ratchet 2, and the first ratchet 2 can rotate relative to the first pawl seat 4 in the forward direction (the direction of rotation indicated by the arrow in the figure). When the rotation speed of the first centrifugal block 7 is greater than a certain range, the centrifugal action of the first centrifugal block 7 is greater than the elastic action of the first separation spring 8, and under the centrifugal action of the first centrifugal block 7, the first separation spring 8 is disengaged from the first ratchet 2.

[0105] When the first friction cam 5 rotates to the first limited angle position relative to the first pawl seat 4, and when the first ratchet 2 reverses or has a reverse motion tendency relative to the first pawl seat 4, the first pawl seat 4 selectively engages with the first ratchet 2, and the first ratchet 2 can be fixed relative to the first pawl seat 4 in the reverse direction. Figures 24-25 As shown, when the first pawl seat 4 is in an engaged state with the first ratchet 2, the first ratchet 2 is fixed relative to the first pawl seat 4 in the reverse direction.

[0106] When the first friction cam 5 rotates to the second limited angle position relative to the first pawl seat 4, and when the first ratchet wheel 2 rotates forward relative to the first pawl seat 4, Figures 26-28 As shown, under the action of the first return spring 3 and the first pawl seat 4, the first pawl 1 is disengaged from the first ratchet 2, thereby avoiding the continuous collision between the pawl and the ratchet. Although when the rotation speed of the first centrifugal block 7 is less than a certain range, there is also friction noise between the first ratchet 2 and the first friction pad 27, but compared with the continuous collision noise generated between the pawl and the ratchet in the traditional ratchet one-way clutch in the separated state, the former (friction noise between friction pairs) is significantly lower than the latter (the continuous collision noise between the pawl and the ratchet between the mating pairs). In addition, when the first friction cam 5 rotates to the second limited angle position relative to the first pawl seat 4, and when the rotation speed of the first centrifugal block 7 is greater than a certain range, the first separation spring 8 is disengaged from the first ratchet 2, as shown in FIG. Figures 29-30 As shown, the friction noise between the first ratchet wheel 2 and the first friction pad 27 can be further avoided at this time.

[0107] Although the first friction pad 27 has a certain wear resistance, the first ratchet 2 and the first friction pad 27 will inevitably produce a certain amount of wear after a long period of operation due to the friction interaction. However, since the first separation spring bracket 26 has a certain elastic deformation ability, the contact pressure between the first ratchet 2 and the first friction pad 27 can be stably maintained within a certain range within a certain use time range, and the wear between the first ratchet 2 and the first friction pad 27 can be compensated to a certain extent, thereby ensuring that the first ratchet 2 and the first friction pad 27 have a relatively stable friction effect within a certain use time range.

[0108] It should be noted that the above embodiments are illustrative rather than limiting of the present invention, and that those skilled in the art may devise alternative embodiments without departing from the scope of the appended claims. Therefore, the embodiments should be considered as exemplary and non-restrictive, and the scope of the present invention is defined by the appended claims rather than the above description, and it is intended that all changes falling within the meaning and scope of the equivalent elements of the claims are included in the present invention, and any reference numerals in the claims should not be considered as limiting the claims involved. In the claims, the word "comprising" does not exclude the presence of data, steps or components not listed in the claims.

[0109] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode includes only one independent technical solution. This narrative method of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

Claims

1. A ratchet clutch having a centrifugal block and a friction cam, used to connect at least two parts of a machine, device, transmission system or mechanism, and / or to selectively achieve the clutch of the power or movement of the connected moving parts by the interaction between the pawl and the ratchet, and / or to selectively achieve the deceleration, stop or keep the connected moving parts in a stopped state by the interaction between the pawl and the ratchet, characterized in that: The ratchet clutch provided with a centrifugal block and a friction cam comprises at least: a pawl, a ratchet, a return spring, a pawl seat, a friction cam, a release spring, and a centrifugal block; and / or The friction cam is directly or indirectly arranged on the ratchet wheel, and the friction cam is rotatable relative to the ratchet wheel within a certain angle range, or the friction cam is directly or indirectly arranged on the pawl seat, and the friction cam is rotatable relative to the pawl seat within a certain angle range; and / or The return spring is directly or indirectly connected to the pawl; and / or When the friction cam is directly or indirectly disposed on the ratchet wheel, the pawl is directly or indirectly disposed on the pawl seat, the friction cam is directly or indirectly connected to the pawl, and the pawl is rotatable relative to the pawl seat within a certain angle range; and / or When the friction cam is directly or indirectly arranged on the pawl seat, the pawl is directly or indirectly arranged on the pawl seat, the friction cam is directly or indirectly connected to the pawl, and the pawl is rotatable relative to the pawl seat within a certain angle range, or the pawl is directly or indirectly arranged on the friction cam, the pawl seat is directly or indirectly connected to the pawl, and the pawl is rotatable relative to the friction cam within a certain angle range; and / or The centrifugal mass is directly or indirectly arranged on the separation spring; and / or When the friction cam is directly or indirectly arranged on the ratchet wheel, under the direct or indirect action of the centrifugal force of the centrifugal block, the friction cam selectively interacts with the ratchet seat through the friction of the separation spring, or when the friction cam is directly or indirectly arranged on the ratchet seat, under the direct or indirect action of the centrifugal force of the centrifugal block, the friction cam selectively interacts with the ratchet wheel through the friction of the separation spring; and / or When the friction cam is directly or indirectly arranged on the ratchet wheel, when the rotation speed of the centrifugal block is less than a certain range, the friction cam interacts with the pawl seat through the friction of the separation spring, and under the friction action of the separation spring or the friction action of the pawl seat, the friction cam is rotatable relative to the ratchet wheel within a certain angle range, and under the direct or indirect action of the friction cam, the return spring and the pawl, the pawl seat and the ratchet wheel are selectively engaged and disengaged; and / or When the friction cam is directly or indirectly arranged on the ratchet wheel and when the rotation speed of the centrifugal block is greater than a certain range, the separation spring is disengaged from the pawl seat or the separation spring is disengaged from the friction cam under the direct or indirect action of the centrifugal force of the centrifugal block; and / or When the friction cam is directly or indirectly arranged on the pawl seat, when the rotation speed of the centrifugal block is less than a certain range, the friction cam interacts with the ratchet wheel through the friction of the separation spring, and under the friction of the separation spring or the friction of the ratchet wheel, the friction cam is rotatable relative to the pawl seat within a certain angle range, and under the direct or indirect action of the friction cam, the return spring and the pawl, the pawl seat and the ratchet wheel are selectively engaged and disengaged; and / or When the friction cam is directly or indirectly arranged on the pawl seat, and when the rotation speed of the centrifugal block is greater than a certain range, under the direct or indirect action of the centrifugal force of the centrifugal block, the separation spring is disengaged from the ratchet wheel, or the separation spring is disengaged from the friction cam; and / or The ratchet wheel and the pawl seat are respectively connected to parts of the machine, or the ratchet wheel and the pawl seat are respectively connected to parts of the device, or the ratchet wheel and the pawl seat are respectively connected to parts of the transmission system, or the ratchet wheel and the pawl seat are respectively connected to parts of the mechanism.

2. The ratchet clutch with centrifugal block and friction cam as claimed in claim 1, characterized in that: The pawl comprises at least a first pawl (1); and / or The ratchet comprises at least a first ratchet (2); and / or The return spring comprises at least a first return spring (3); and / or The pawl seat at least comprises a first pawl seat (4); and / or The friction cam comprises at least a first friction cam (5); and / or The separation spring comprises at least a first separation spring (8); and / or The centrifugal block comprises at least a first centrifugal block (7); and / or The first friction cam (5) is directly or indirectly arranged on the first ratchet (2), and the first friction cam (5) is rotatable relative to the first ratchet (2) between a first limited angle and a second limited angle; and / or The first return spring (3) is directly or indirectly connected to the first pawl (1); and / or When the first friction cam (5) is directly or indirectly arranged on the first ratchet wheel (2), the first pawl (1) is directly or indirectly arranged on the first pawl seat (4), the first friction cam (5) is directly or indirectly connected to the first pawl (1), and the first pawl (1) is rotatable relative to the first pawl seat (4) within a certain angle range; and / or The first centrifugal mass (7) is directly or indirectly arranged on the first separation spring (8); and / or When the first friction cam (5) is directly or indirectly arranged on the first ratchet wheel (2), the first separation spring (8) is directly or indirectly arranged on the first friction cam (5); and / or When the first friction cam (5) is directly or indirectly arranged on the first ratchet wheel (2), under the direct or indirect action of the centrifugal force of the first centrifugal block (7), the first friction cam (5) selectively interacts with the first pawl seat (4) through the friction of the first separation spring (8); and / or When the first friction cam (5) is directly or indirectly arranged on the first ratchet (2), and when the rotation speed of the first centrifugal block (7) is less than a certain range, the first friction cam (5) interacts with the first pawl seat (4) through the friction of the first separation spring (8), and under the friction action of the first pawl seat (4), the first friction cam (5) is rotatable relative to the first ratchet (2) between a first limited angle and a second limited angle; and / or When the first friction cam (5) is directly or indirectly arranged on the first ratchet (2), when the first friction cam (5) rotates to the first limited angle position relative to the first ratchet (2), under the direct or indirect action of the first friction cam (5), the first return spring (3) and the first ratchet (1), the first ratchet seat (4) is selectively engaged with the first ratchet (2); and / or When the first friction cam (5) is directly or indirectly arranged on the first ratchet (2), when the first friction cam (5) rotates to the second limited angle position relative to the first ratchet (2), under the direct or indirect action of the first friction cam (5), the first return spring (3) and the first ratchet (1), the first ratchet seat (4) and the first ratchet (2) are in a separated state; and / or When the first friction cam (5) is directly or indirectly arranged on the first ratchet wheel (2), and when the rotation speed of the first centrifugal block (7) is greater than a certain range, under the direct or indirect action of the centrifugal force of the first centrifugal block (7), the first separation spring (8) is disengaged from the first pawl seat (4); and / or The first ratchet (2) and the first pawl seat (4) are respectively connected to parts of the machine, or the first ratchet (2) and the first pawl seat (4) are respectively connected to parts of the device, or the first ratchet (2) and the first pawl seat (4) are respectively connected to parts of the transmission system, or the first ratchet (2) and the first pawl seat (4) are respectively connected to 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; and / or The first separation spring (8) comprises at least one or more parts; and / or The first centrifugal block (7) comprises at least one or more parts.

3. The ratchet clutch with centrifugal block and friction cam as claimed in claim 1, characterized in that: The pawl comprises at least a first pawl (1); and / or The ratchet comprises at least a first ratchet (2); and / or The return spring comprises at least a first return spring (3); and / or The pawl seat at least comprises a first pawl seat (4); and / or The friction cam comprises at least a first friction cam (5); and / or The separation spring comprises at least a first separation spring (8); and / or The centrifugal block comprises at least a first centrifugal block (7); and / or The first friction cam (5) is directly or indirectly arranged on the first ratchet (2), and the first friction cam (5) is rotatable relative to the first ratchet (2) between a first limited angle and a second limited angle; and / or The first return spring (3) is directly or indirectly connected to the first pawl (1); and / or When the first friction cam (5) is directly or indirectly arranged on the first ratchet wheel (2), the first pawl (1) is directly or indirectly arranged on the first pawl seat (4), the first friction cam (5) is directly or indirectly connected to the first pawl (1), and the first pawl (1) is rotatable relative to the first pawl seat (4) within a certain angle range; and / or The first centrifugal mass (7) is directly or indirectly arranged on the first separation spring (8); and / or When the first friction cam (5) is directly or indirectly arranged on the first ratchet wheel (2), the first separation spring (8) is directly or indirectly arranged on the first pawl seat (4); and / or When the first friction cam (5) is directly or indirectly arranged on the first ratchet wheel (2), under the direct or indirect action of the centrifugal force of the first centrifugal block (7), the first friction cam (5) selectively interacts with the first pawl seat (4) through the friction of the first separation spring (8); and / or When the first friction cam (5) is directly or indirectly arranged on the first ratchet (2), and when the rotation speed of the first centrifugal block (7) is less than a certain range, the first friction cam (5) interacts with the first pawl seat (4) through the friction of the first separation spring (8), and under the friction action of the first separation spring (8), the first friction cam (5) is rotatable relative to the first ratchet (2) between a first limited angle and a second limited angle; and / or When the first friction cam (5) is directly or indirectly arranged on the first ratchet (2), when the first friction cam (5) rotates to the first limited angle position relative to the first ratchet (2), under the direct or indirect action of the first friction cam (5), the first return spring (3) and the first ratchet (1), the first ratchet seat (4) is selectively engaged with the first ratchet (2); and / or When the first friction cam (5) is directly or indirectly arranged on the first ratchet (2), when the first friction cam (5) rotates to the second limited angle position relative to the first ratchet (2), under the direct or indirect action of the first friction cam (5), the first return spring (3) and the first ratchet (1), the first ratchet seat (4) and the first ratchet (2) are in a separated state; and / or When the first friction cam (5) is directly or indirectly arranged on the first ratchet (2), and when the rotation speed of the first centrifugal block (7) is greater than a certain range, under the direct or indirect action of the centrifugal force of the first centrifugal block (7), the first separation spring (8) is disengaged from the first friction cam (5); and / or The first ratchet (2) and the first pawl seat (4) are respectively connected to parts of the machine, or the first ratchet (2) and the first pawl seat (4) are respectively connected to parts of the device, or the first ratchet (2) and the first pawl seat (4) are respectively connected to parts of the transmission system, or the first ratchet (2) and the first pawl seat (4) are respectively connected to 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; and / or The first separation spring (8) comprises at least one or more parts; and / or The first centrifugal block (7) comprises at least one or more parts.

4. The ratchet clutch with centrifugal block and friction cam as claimed in claim 1, characterized in that: The pawl comprises at least a first pawl (1); and / or The ratchet comprises at least a first ratchet (2); and / or The return spring comprises at least a first return spring (3); and / or The pawl seat at least comprises a first pawl seat (4); and / or The friction cam comprises at least a first friction cam (5); and / or The separation spring comprises at least a first separation spring (8); and / or The centrifugal block comprises at least a first centrifugal block (7); 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 return spring (3) is directly or indirectly connected to the first pawl (1); and / or When the first friction cam (5) is directly or indirectly arranged on the first pawl seat (4), the first pawl (1) is directly or indirectly arranged on the first pawl seat (4), the first friction cam (5) is directly or indirectly connected to the first pawl (1), and the first pawl (1) is rotatable relative to the first pawl seat (4) within a certain angle range; and / or The first centrifugal mass (7) is directly or indirectly arranged on the first separation spring (8); and / or When the first friction cam (5) is directly or indirectly arranged on the first pawl seat (4), the first separation spring (8) is directly or indirectly arranged on the first friction cam (5); and / or When the first friction cam (5) is directly or indirectly arranged on the first pawl seat (4), under the direct or indirect action of the centrifugal force of the first centrifugal block (7), the first friction cam (5) selectively interacts with the first ratchet wheel (2) through the friction of the first separation spring (8); and / or When the first friction cam (5) is directly or indirectly arranged on the first pawl seat (4), and when the rotation speed of the first centrifugal block (7) is less than a certain range, the first friction cam (5) interacts with the first ratchet wheel (2) through the friction of the first separation spring (8), and under the friction action of the first ratchet wheel (2), 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 When the first friction cam (5) is directly or indirectly arranged on the first pawl seat (4), and when the first friction cam (5) rotates to the first limited angle position relative to the first pawl seat (4), under the direct or indirect action of the first friction cam (5), the first return spring (3) and the first pawl (1), the first pawl seat (4) and the first ratchet wheel (2) are selectively engaged; and / or When the first friction cam (5) is directly or indirectly arranged on the first pawl seat (4), and when the first friction cam (5) rotates to the second limited angle position relative to the first pawl seat (4), under the direct or indirect action of the first friction cam (5), the first return spring (3) and the first pawl (1), the first pawl seat (4) and the first ratchet (2) are in a separated state; and / or When the first friction cam (5) is directly or indirectly arranged on the first pawl seat (4), and when the rotation speed of the first centrifugal block (7) is greater than a certain range, the first separation spring (8) is disengaged from the first ratchet wheel (2) under the direct or indirect action of the centrifugal force of the first centrifugal block (7); and / or The first ratchet (2) and the first pawl seat (4) are respectively connected to parts of the machine, or the first ratchet (2) and the first pawl seat (4) are respectively connected to parts of the device, or the first ratchet (2) and the first pawl seat (4) are respectively connected to parts of the transmission system, or the first ratchet (2) and the first pawl seat (4) are respectively connected to 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; and / or The first separation spring (8) comprises at least one or more parts; and / or The first centrifugal block (7) comprises at least one or more parts.

5. The ratchet clutch with centrifugal block and friction cam as claimed in claim 1, characterized in that: The pawl comprises at least a first pawl (1); and / or The ratchet comprises at least a first ratchet (2); and / or The return spring comprises at least a first return spring (3); and / or The pawl seat at least comprises a first pawl seat (4); and / or The friction cam comprises at least a first friction cam (5); and / or The separation spring comprises at least a first separation spring (8); and / or The centrifugal block comprises at least a first centrifugal block (7); 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 return spring (3) is directly or indirectly connected to the first pawl (1); and / or When the first friction cam (5) is directly or indirectly arranged on the first pawl seat (4), the first pawl (1) is directly or indirectly arranged on the first pawl seat (4), the first friction cam (5) is directly or indirectly connected to the first pawl (1), and the first pawl (1) is rotatable relative to the first pawl seat (4) within a certain angle range; and / or The first centrifugal mass (7) is directly or indirectly arranged on the first separation spring (8); and / or When the first friction cam (5) is directly or indirectly arranged on the first pawl seat (4), the first separation spring (8) is directly or indirectly arranged on the first ratchet wheel (2); and / or When the first friction cam (5) is directly or indirectly arranged on the first pawl seat (4), under the direct or indirect action of the centrifugal force of the first centrifugal block (7), the first friction cam (5) selectively interacts with the first ratchet wheel (2) through the friction of the first separation spring (8); and / or When the first friction cam (5) is directly or indirectly arranged on the first pawl seat (4), and when the rotation speed of the first centrifugal block (7) is less than a certain range, the first friction cam (5) interacts with the first ratchet wheel (2) through the friction of the first separation spring (8), and under the friction action of the first separation spring (8), 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 When the first friction cam (5) is directly or indirectly arranged on the first pawl seat (4), and when the first friction cam (5) rotates to the first limited angle position relative to the first pawl seat (4), under the direct or indirect action of the first friction cam (5), the first return spring (3) and the first pawl (1), the first pawl seat (4) and the first ratchet wheel (2) are selectively engaged; and / or When the first friction cam (5) is directly or indirectly arranged on the first pawl seat (4), and when the first friction cam (5) rotates to the second limited angle position relative to the first pawl seat (4), under the direct or indirect action of the first friction cam (5), the first return spring (3) and the first pawl (1), the first pawl seat (4) and the first ratchet (2) are in a separated state; and / or When the first friction cam (5) is directly or indirectly arranged on the first pawl seat (4), and when the rotation speed of the first centrifugal block (7) is greater than a certain range, under the direct or indirect action of the centrifugal force of the first centrifugal block (7), the first separation spring (8) is disengaged from the first friction cam (5); and / or The first ratchet (2) and the first pawl seat (4) are respectively connected to parts of the machine, or the first ratchet (2) and the first pawl seat (4) are respectively connected to parts of the device, or the first ratchet (2) and the first pawl seat (4) are respectively connected to parts of the transmission system, or the first ratchet (2) and the first pawl seat (4) are respectively connected to 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; and / or The first separation spring (8) comprises at least one or more parts; and / or The first centrifugal block (7) comprises at least one or more parts.

6. The ratchet clutch with centrifugal block and friction cam as claimed in claim 1, characterized in that: The pawl comprises at least a first pawl (1); and / or The ratchet comprises at least a first ratchet (2); and / or The return spring comprises at least a first return spring (3); and / or The pawl seat at least comprises a first pawl seat (4); and / or The friction cam comprises at least a first friction cam (5); and / or The separation spring comprises at least a first separation spring (8); and / or The centrifugal block comprises at least a first centrifugal block (7); 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 return spring (3) is directly or indirectly connected to the first pawl (1); and / or When the first friction cam (5) is directly or indirectly arranged on the first pawl seat (4), the first pawl (1) is directly or indirectly arranged on the first friction cam (5), the first pawl seat (4) is directly or indirectly connected to the first pawl (1), and the first pawl (1) is rotatable relative to the first friction cam (5) within a certain angle range; and / or The first centrifugal mass (7) is directly or indirectly arranged on the first separation spring (8); and / or When the first friction cam (5) is directly or indirectly arranged on the first pawl seat (4), the first separation spring (8) is directly or indirectly arranged on the first friction cam (5); and / or When the first friction cam (5) is directly or indirectly arranged on the first pawl seat (4), under the direct or indirect action of the centrifugal force of the first centrifugal block (7), the first friction cam (5) selectively interacts with the first ratchet wheel (2) through the friction of the first separation spring (8); and / or When the first friction cam (5) is directly or indirectly arranged on the first pawl seat (4), and when the rotation speed of the first centrifugal block (7) is less than a certain range, the first friction cam (5) interacts with the first ratchet wheel (2) through the friction of the first separation spring (8), and under the friction action of the first ratchet wheel (2), 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 When the first friction cam (5) is directly or indirectly arranged on the first pawl seat (4), and when the first friction cam (5) rotates to the first limited angle position relative to the first pawl seat (4), under the direct or indirect action of the first friction cam (5), the first return spring (3) and the first pawl (1), the first pawl seat (4) and the first ratchet wheel (2) are selectively engaged; and / or When the first friction cam (5) is directly or indirectly arranged on the first pawl seat (4), and when the first friction cam (5) rotates to the second limited angle position relative to the first pawl seat (4), under the direct or indirect action of the first friction cam (5), the first return spring (3) and the first pawl (1), the first pawl seat (4) and the first ratchet (2) are in a separated state; and / or When the first friction cam (5) is directly or indirectly arranged on the first pawl seat (4), and when the rotation speed of the first centrifugal block (7) is greater than a certain range, the first separation spring (8) is disengaged from the first ratchet wheel (2) under the direct or indirect action of the centrifugal force of the first centrifugal block (7); and / or The first ratchet (2) and the first pawl seat (4) are respectively connected to parts of the machine, or the first ratchet (2) and the first pawl seat (4) are respectively connected to parts of the device, or the first ratchet (2) and the first pawl seat (4) are respectively connected to parts of the transmission system, or the first ratchet (2) and the first pawl seat (4) are respectively connected to 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; and / or The first separation spring (8) comprises at least one or more parts; and / or The first centrifugal block (7) comprises at least one or more parts.

7. The ratchet clutch with centrifugal block and friction cam as claimed in claim 1, characterized in that: The pawl comprises at least a first pawl (1); and / or The ratchet comprises at least a first ratchet (2); and / or The return spring comprises at least a first return spring (3); and / or The pawl seat at least comprises a first pawl seat (4); and / or The friction cam comprises at least a first friction cam (5); and / or The separation spring comprises at least a first separation spring (8); and / or The centrifugal block comprises at least a first centrifugal block (7); 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 return spring (3) is directly or indirectly connected to the first pawl (1); and / or When the first friction cam (5) is directly or indirectly arranged on the first pawl seat (4), the first pawl (1) is directly or indirectly arranged on the first friction cam (5), the first pawl seat (4) is directly or indirectly connected to the first pawl (1), and the first pawl (1) is rotatable relative to the first friction cam (5) within a certain angle range; and / or The first centrifugal mass (7) is directly or indirectly arranged on the first separation spring (8); and / or When the first friction cam (5) is directly or indirectly arranged on the first pawl seat (4), the first separation spring (8) is directly or indirectly arranged on the first ratchet wheel (2); and / or When the first friction cam (5) is directly or indirectly arranged on the first pawl seat (4), under the direct or indirect action of the centrifugal force of the first centrifugal block (7), the first friction cam (5) selectively interacts with the first ratchet wheel (2) through the friction of the first separation spring (8); and / or When the first friction cam (5) is directly or indirectly arranged on the first pawl seat (4), and when the rotation speed of the first centrifugal block (7) is less than a certain range, the first friction cam (5) interacts with the first ratchet wheel (2) through the friction of the first separation spring (8), and under the friction action of the first separation spring (8), 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 When the first friction cam (5) is directly or indirectly arranged on the first pawl seat (4), and when the first friction cam (5) rotates to the first limited angle position relative to the first pawl seat (4), under the direct or indirect action of the first friction cam (5), the first return spring (3) and the first pawl (1), the first pawl seat (4) and the first ratchet wheel (2) are selectively engaged; and / or When the first friction cam (5) is directly or indirectly arranged on the first pawl seat (4), and when the first friction cam (5) is rotated to the second limited angle position relative to the first pawl seat (4), under the direct or indirect action of the first friction cam (5), the first return spring (3) and the first pawl (1), the first pawl seat (4) and the first ratchet (2) are in a separated state; and / or When the first friction cam (5) is directly or indirectly arranged on the first pawl seat (4), and when the rotation speed of the first centrifugal block (7) is greater than a certain range, under the direct or indirect action of the centrifugal force of the first centrifugal block (7), the first separation spring (8) is disengaged from the first friction cam (5); and / or The first ratchet (2) and the first pawl seat (4) are respectively connected to parts of the machine, or the first ratchet (2) and the first pawl seat (4) are respectively connected to parts of the device, or the first ratchet (2) and the first pawl seat (4) are respectively connected to parts of the transmission system, or the first ratchet (2) and the first pawl seat (4) are respectively connected to 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; and / or The first separation spring (8) comprises at least one or more parts; and / or The first centrifugal block (7) comprises at least one or more parts.

8. The ratchet clutch with centrifugal block and friction cam according to any one of claims 2 to 7, characterized in that: When the friction cam is directly or indirectly arranged on the ratchet wheel, when the friction cam rotates to the first limited angle position relative to the ratchet wheel, the ratchet wheel has an angle positioning effect on the friction cam; and / or When the friction cam is directly or indirectly arranged on the ratchet wheel, when the friction cam rotates to the second limited angle position relative to the ratchet wheel, the ratchet wheel has an angular positioning effect on the friction cam; and / or When the friction cam is directly or indirectly arranged on the pawl seat, when the friction cam rotates to the first limited angle position relative to the pawl seat, the pawl seat has an angle positioning effect on the friction cam; and / or When the friction cam is directly or indirectly arranged on the pawl seat, when the friction cam rotates to the second limited angle position relative to the pawl seat, the pawl seat has an angle positioning effect on the friction cam.

9. The ratchet clutch with centrifugal block and friction cam according to any one of claims 1 to 7, characterized in that: When the friction cam is directly or indirectly disposed on the ratchet, the friction cam is rotatably disposed on the ratchet directly or indirectly through a shaft hole clearance fit, or the friction cam is rotatably disposed on the ratchet directly or indirectly through a bearing; and / or When the friction cam is directly or indirectly arranged on the pawl seat, the friction cam is rotatably arranged on the pawl seat directly or indirectly through shaft hole clearance fit, or the friction cam is rotatably arranged on the pawl seat directly or indirectly through a bearing.

10. The ratchet clutch with centrifugal block and friction cam according to any one of claims 1 to 7, characterized in that: When the pawl is directly or indirectly arranged on the pawl seat, the pawl is rotatably arranged on the pawl seat directly or indirectly through the shaft hole clearance fit, or the pawl is rotatably arranged on the pawl seat directly or indirectly through a bearing; and / or When the pawl is directly or indirectly disposed on the friction cam, the pawl is rotatably disposed on the friction cam directly or indirectly through a shaft hole clearance fit, or the pawl is rotatably disposed on the friction cam directly or indirectly through a bearing.

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