Mute ratchet mechanism and winch brake device based on mute ratchet mechanism

Abstract

The invention relates to the technical field of traction and lifting equipment, in particular to a silent ratchet mechanism and a winch brake device based on the silent ratchet mechanism, the silent ratchet mechanism comprises a pawl seat, a ratchet and a pawl, the ratchet and the pawl are matched with each other, and a contact striking part of at least one of the ratchet and the pawl is provided with a silencing part made of a non-metal wear-resistant material; the shaft body is provided with a first thread part; the ratchet mechanism is arranged on the shaft body; the movable part is in threaded fit with the first threaded part; and the limiting part limits the movement stroke of the movable part. The impact noise is remarkably reduced, the application requirement of a high-silence working environment is met, the applicability is higher, the acting force on a winch brake device of a ratchet wheel and a pawl and an external mounting support in the braking process is effectively reduced, the requirement for the winch brake device of the ratchet wheel and the pawl and the mounting support is lower, a lighter support is allowed to be used in cooperation with the winch brake device, and the practicability is high. The weight and the cost of the whole product series are reduced, and the safety and the reliability are remarkably improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of traction and lifting equipment, and particularly relates to a silent ratchet mechanism and a winch brake device based on the same. BACKGROUND

[0002] As a common traction equipment, the core function of a winch is to lift or drag heavy objects by winding a cable, and the winch is widely used in many fields such as automobile rescue, industrial lifting, ship wharf operation, forestry mining and emergency rescue. In these working conditions, the winch not only needs to provide strong traction, but also needs reliable self-locking brake capability to ensure the safety of the equipment and personnel. That is, in the moment of power interruption (such as motor stop, engine stall), the winch brake device must be able to immediately and automatically lock the transmission system to effectively prevent the load from dragging the cable in the opposite direction due to gravity or inertia, thereby preventing serious accidents such as vehicle sliding and heavy object falling.

[0003] The ratchet mechanism is generally considered as one of the ideal choices for the winch brake device in the winch drive system due to its inherent mechanical characteristics of achieving one-way transmission and generating reliable self-locking in the reverse direction. The basic working principle is as follows: when the driving mechanism is driven, the ratchet and the friction plate are separated or overtake combined, so as to transmit power; when the motor stops, the external load drives in the opposite direction through the transmission chain, so that the movable part in the ratchet mechanism is axially pressed against the friction plate group, and the pawl is quickly clamped into the ratchet teeth under the action of the torsional spring, thereby achieving braking by mechanical interlocking. However, the traditional technical solution has the following obvious defects: Firstly, there is a serious deficiency in the silent performance of the ratchet and pawl during normal power output. The pawl and ratchet of the existing technology are usually made of metal materials. During normal power output, the metal pawl falls from the end of the ratchet tooth and collides with the main body of the ratchet, producing sharp and high-frequency impact noise. This noise is particularly prominent in closed or high-silence environments, causing noise pollution and affecting the comfort of operation. The industry generally lacks a simple and reliable solution to effectively suppress the noise source.

[0004] Secondly, in order to reduce the high-frequency noise caused by the number of revolutions, the winch brake device composed of the ratchet mechanism is usually installed at the second or more reduction of the reduction box or the maximum load position, which requires extremely strict requirements for the material and process treatment of the parts of the ratchet mechanism. Under the long-term, high-load and especially vibration conditions of the winch, the winch brake device is prone to failure due to thread pair wear and vibration, which poses a safety risk of brake failure. SUMMARY

[0005] The present application provides a silent ratchet mechanism and a winch brake device based on the same to solve at least one of the above-mentioned problems in the prior art, and adopts the following technical solution: The mute ratchet mechanism comprises a pawl seat, a ratchet wheel and a pawl, and a mute part is arranged on the contact part of at least one of the ratchet wheel and the pawl; the pawl is composed of a pawl body and a hitting end at the end of the pawl, and the mute part arranged on the pawl comprises one of the following modes: the mute part is wrapped on the pawl body; the mute part is arranged at the hitting end; the mute part is arranged on the opposite contact surface of the pawl and the ratchet wheel; or the ratchet wheel is composed of a ratchet wheel body and a ratchet tooth, and the mute part arranged on the ratchet wheel comprises one of the following modes: the mute part is wrapped on the ratchet wheel body; the mute part is arranged on both sides of the ratchet wheel body; the mute part is arranged on the outer circumferential surface of the ratchet wheel body, and the mute part is located below the ratchet tooth step.

[0006] Preferably, the mute part wrapped on the pawl body, the mute part arranged at the hitting end, the mute part wrapped on the ratchet wheel body, the mute part arranged on both sides of the ratchet wheel body, and the mute part arranged on the outer circumferential surface of the ratchet wheel body and located below the ratchet tooth step are all made of non-metallic materials.

[0007] Preferably, the outer contour size of the mute part arranged on both sides of the ratchet wheel body is greater than the outer contour size of the ratchet wheel body.

[0008] Preferably, the ratchet wheel and the pawl are made of metallic materials or non-metallic materials, the mute part is wrapped on the pawl body or the ratchet wheel body, and the pawl or the ratchet wheel and the mute part are made of the same material, so that the pawl or the ratchet wheel and the mute part are integrally formed.

[0009] A winch brake device based on the mute ratchet mechanism comprises the mute ratchet mechanism, and further comprises: a shaft body, the mute ratchet mechanism is arranged on the shaft body, a first threaded part is arranged on the shaft body, the threaded direction of the first threaded part towards the direction of the mute ratchet mechanism matches the locking and limiting rotation direction formed by the cooperation of the ratchet wheel and the pawl; a movable part, the movable part is threadedly connected with the first threaded part; and a limiting part, the limiting part limits the movement stroke of the movable part.

[0010] Preferably, the movable part comprises a coupling, the coupling is provided with an internal thread, the internal thread is located at the end of the coupling close to the shaft body, an output connecting part is arranged at the other end of the coupling, the output connecting part is used for connecting with a transmission shaft, a positioning part is further arranged in the coupling, the positioning part is arranged on the thread side, and the positioning part is movably positioned with the end of the shaft body, so that the shaft body is moved along the axial direction in the positioning part through the cooperation of the first threaded part and the internal thread.

[0011] Preferably, a limiting piece is fixedly connected to the outer wall of the coupling, a limiting ring groove is formed in the shaft body, the limiting ring groove is located between the first threaded part and the end of the shaft body, the limiting piece passes through the outer wall of the coupling and cooperates with the limiting ring groove, thereby limiting the relative movement stroke of the movable part and the first threaded part when they are threadedly connected.

[0012] Preferably, an annular groove is formed in the outer wall of the coupling, the limiting piece is located in the annular groove, and a retainer ring is arranged on the annular groove to fixedly clamp the limiting piece.

[0013] Preferably, a coupling is further arranged at the end of the shaft body, an output connecting part is formed at one end of the coupling, the coupling is connected with the movable part, and the coupling cooperates with the movable part to realize the transmission connection between the shaft body and the coupling. A positioning part is further formed in the coupling and cooperates with the shaft body.

[0014] Preferably, a meshing part is formed at the end of the coupling away from the output connecting part, the movable part is insertedly connected with the meshing part to realize the transmission connection between the coupling and the movable part.

[0015] Preferably, the coupling is integrally connected with the movable part, a side groove is formed in the middle of the coupling, the limiting part is located in the side groove to limit the relative movement stroke of the movable part and the first threaded part when they are threadedly connected, and the positioning part is formed in the coupling.

[0016] Preferably, the limiting part comprises a limiting sleeve and a fixed stop piece, the limiting sleeve is sleeved on the shaft body, the limiting sleeve is located in the side groove and close to the end of the first threaded part, and the fixed stop piece is inserted on the shaft body and cooperates with the limiting sleeve to form a limit.

[0017] Preferably, the output connecting part is arranged in the coupling, and the output connecting part is matched with and transmissionally connected with a transmission shaft.

[0018] Preferably, the output connecting part is arranged on the outer circumferential surface of the coupling, and the output connecting part is a toothed structure.

[0019] Preferably, the winch brake device is arranged at the end of the speed reducer, the toothed structure of the output connecting part is engaged with a speed reduction gear in the speed reducer to realize transmission, the shaft body is transmissionally connected with the transmission shaft, and the silent ratchet mechanism is arranged at the end of the shaft body away from the transmission shaft.

[0020] Preferably, the limiting part comprises a limiting nut and a stop washer, the limiting nut is threadedly connected with the second threaded part arranged on the shaft body, and the stop washer is arranged between the limiting nut and the shaft body and is installed in cooperation with the stop groove arranged on the shaft body.

[0021] Preferably, the stop washer comprises a stop angle arranged at the inner and outer circles of the stop washer respectively, the stop angle at the inner circle cooperates with the stop groove to stop, and the stop angle at the outer circle is bent after the limiting nut is tightened and cooperates with the limiting groove arranged on the limiting nut.

[0022] Preferably, the device further comprises a rotation-stopping washer and a rotation-stopping flat square arranged on the shaft body, the rotation-stopping washer and the rotation-stopping flat square are arranged at the end of the first threaded part away from the limiting part, the inner circle of the rotation-stopping washer is provided with a rotation-stopping surface, and the rotation-stopping surface cooperates with the rotation-stopping flat square to stop rotation.

[0023] Preferably, a plurality of holes are arranged on the rotation-stopping washer and are arranged on the side of the rotation-stopping washer facing the ratchet wheel.

[0024] Preferably, the brake device is arranged between the driving device and the speed reducer, the shaft body is arranged as an output shaft of the driving device, and the pawl and the pawl seat are connected with the output end support of the driving device.

[0025] Compared with the prior art, the device has the following beneficial effects: 1. The noise reduction ratchet mechanism of the winch brake device is provided with a noise reduction part made of non-metallic material on the contact and beating part of the ratchet and / or pawl, so that the rigid impact between the ratchet and the pawl is converted into flexible contact and buffering of the non-metallic material from the source of noise, thereby fundamentally and significantly reducing the impact noise, making the external noise of the device extremely low during operation, meeting the application requirements of high-quiet working environment, and being suitable for selection of the ratchet mechanism according to different working conditions, performance requirements, process costs and maintenance requirements, and having higher applicability.

[0026] 2. The shaft coupling of the winch brake device is provided with an output connecting part, an engaging part and a positioning part, so as to realize three functions of output connection, axial sliding guidance and circumferential positioning by one component. The prior art usually needs separate positioning sleeves, key grooves and sliding connection mechanisms to realize the same functions, thereby greatly simplifying the assembly process, making the overall structure of the brake device more compact, effectively saving axial space and having higher reliability.

[0027] 3. The winch brake device integrates the whole device on the shaft body end, effectively reduces the force acting on the external mounting support during braking, has lower requirements for the mounting support, allows a lighter support to be used, and reduces the weight and cost of the whole product series.

[0028] 4. The winch brake device effectively prevents the movable part from disengaging from the shaft body when the lock is released and power is outputted outward through the design of the limiting part. The two designs of the limiting nut and the stop washer, the limiting sleeve and the fixed stopper can adapt to different working conditions. The limiting nut and the stop washer provide mechanical locking, which is more effective than the conventional spring washer. The cooperation design of the limiting sleeve and the fixed stopper fundamentally eliminates the situation of thread aging and loosening, and is suitable for high vibration working conditions. The design of the limiting part significantly improves safety and reliability. BRIEF DESCRIPTION OF DRAWINGS

[0029] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the drawings needed to be used in the embodiments or prior art description will be described below. Obviously, the technical solutions described in the description in combination with the drawings are only some embodiments of the present application. For those skilled in the art, other embodiments and drawings can be obtained from the embodiments shown in the drawings without creative labor.

[0030] Figure 1 is a structure schematic diagram of the pawl of the embodiment 1 of the present application; Figure 2 is a structure schematic diagram of the pawl of the embodiment 2 of the present application; Figure 3 is a structure schematic diagram of the pawl of the embodiment 3 of the present application; Figure 4 is a structure schematic diagram of the pawl of the embodiment 4 of the present application; Figure 5 is a structure schematic diagram of the pawl of the embodiment 5 of the present application; Figure 6 is a structure schematic diagram of the ratchet wheel of the embodiment 6 of the present application; Figure 7 is a structure schematic diagram of the ratchet wheel of the embodiment 7 of the present application; Figure 8 is a structure schematic diagram of the ratchet wheel of the embodiment 8 of the present application; Figure 9 is an exploded view of the embodiment 9 of the present application; Figure 10 is an exploded view of the limiting part of the embodiment 9 of the present application; Figure 11 is a sectional view of the coupling of the embodiment 9 of the present application; Figure 12 is a schematic diagram of the embodiment 9 of the present application installed to the driving output end; Figure 13 is a structure schematic diagram of the shaft body of the embodiment 10 of the present application; Figure 14 is an exploded view of the embodiment 10 of the present application; Figure 15、 Figure 16 、 Figure 17 is a structural schematic diagram of the coupling of the present application; Figure 18 is a schematic diagram of the present application installed in the driving output end state; Figure 19 is a structural cross-sectional view of the present application after installation; Figure 20 is a schematic diagram of the present application installed in the speed reduction device; Figure 21 is a structural schematic diagram of the present application of the rotation stop washer; Figure 22 is a structural schematic diagram of the hole on the rotation stop washer of the present application; Figure 23 、 Figure 24 is a structural schematic diagram of the limiting part of embodiment 10 of the present application; Figure 25 is a structural schematic diagram of embodiment 11 of the present application; Figure 26 is an exploded view of embodiment 11 of the present application; Figure 27 is a cross-sectional view of the coupling of embodiment 11 of the present application; Figure 28 is a structural schematic diagram of the internal engagement of the ratchet and the pawl of the present application.

[0031] Reference signs: 1, sound reduction part; 2, pawl main body; 201, hitting end; 3, ratchet main body; 301, ratchet teeth; 4, shaft body; 401, first threaded part; 402, second threaded part; 403, stop groove; 404, rotation stop flat; 405, limiting ring groove; 5, movable part; 6, limiting nut; 601, stop washer; 611, stop angle; 602, limiting groove; 7, limiting sleeve; 701, fixed stop; 8, rotation stop washer; 801, rotation stop surface; 802, hole; 9, coupling; 901, output connecting part; 902, engagement part; 903, positioning part; 12, limiting part; 13, retainer. DETAILED DESCRIPTION

[0032] The technical solutions of the embodiments of the present application will be described in detail below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present application, not all embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative labor are within the scope of protection of the present application.

[0033] In the description of the present application, it should be noted that the terms "upper", "lower", "inner", "outer", "front end", "rear end", "both ends", "one end", "the other end" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present application. In addition, the terms "first" and "second" are only for descriptive purposes and cannot be understood as indicating or implying relative importance.

[0034] In the description of the present application, it should be noted that unless otherwise explicitly specified and limited, the terms "mounting", "provided with", "connection" and the like should be broadly understood, for example, "connection" can be fixed connection, can also be detachable connection, or integral connection; can be mechanical connection, can also be electrical connection; can be directly connected, can also be indirectly connected through an intermediate medium, can be internal communication of two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0035] Embodiments of the present application provide a silent ratchet mechanism and a winch brake device based thereon.

[0036] A silent ratchet mechanism, comprising a ratchet mechanism, the ratchet mechanism comprising a pawl seat, a ratchet and a pawl cooperating with each other, and a sound-attenuating part 1 provided on the contact part of at least one of the ratchet and the pawl.

[0037] A winch brake device based on a silent ratchet mechanism, comprising a silent ratchet mechanism, further comprising: a shaft body 4, the silent ratchet mechanism being arranged on the shaft body 4, the shaft body 4 being provided with a first threaded part 401, the threaded rotation direction of the first threaded part 401 towards the silent ratchet mechanism being matched with the locking limiting rotation direction formed by the cooperation of the ratchet and the pawl; a movable part 5, the movable part 5 being threadedly matched with the first threaded part 401, the movable part 5 can be selected from a nut, a threaded column and other components having internal threads capable of cooperating with the first threaded part 401, and the specific type of component is not specifically limited, as long as it can cooperate with the first threaded part 401, the internal threads of the movable part 5 can adopt a multi-start lead, and the response speed is faster and the bearing force is larger when the brake is released or applied. Further comprising a limiting part to limit the movement stroke of the movable part 5, and when the brake is released, the movable part 5 is limited from being pulled out, thereby providing reliable mechanical limiting for the axial movement of the movable part 5, preventing the movable part 5 from being pulled out of the shaft body 4 in the state of releasing the brake, and ensuring the safety and stability of the device.

[0038] The silent ratchet mechanism comprises a ratchet mechanism, the ratchet mechanism comprising a pawl seat, a ratchet and a pawl cooperating with each other, and a sound-attenuating part 1 provided on the contact part of at least one of the ratchet and the pawl.

[0039] Example 1: As Figure 1 As shown, the noise-reducing part 1 is disposed on the pawl: In a preferred embodiment of this application, the pawl is composed of a pawl body 2 and a noise-reducing part 1 covered thereon by a high-strength non-metallic wear-resistant material. This embodiment has a simple and reliable process, can achieve all-round noise reduction and impact protection, and at the same time avoids corrosion and wear of the metal pawl body 2, thus extending its service life.

[0040] Example 2: As Figure 2 As shown, the noise-reducing part 1 is disposed on the pawl: In a preferred embodiment of this application, the pawl is partially provided with a noise-reducing part 1 made of high-strength non-metallic wear-resistant material, and the noise-reducing part 1 is located at the striking end 201 at the end of the pawl. The noise-reducing part 1 is embedded into the contact point between the striking end 201 and the ratchet body 3, and the noise-reducing part 1 and the pawl form an integral whole. Without changing the shape of the pawl, the noise generated when the pawl strikes the ratchet is effectively reduced. This embodiment ensures the noise reduction effect at key contact points while maximizing the structural strength and rigidity of the metal pawl body 2, and saves on the amount of high-performance non-metallic materials used, thus reducing manufacturing costs.

[0041] Example 3: As Figure 3 As shown, the noise-reducing part 1 is disposed on the pawl: In a preferred embodiment of this application, the pawl is partially provided with a noise-reducing part 1 made of high-strength non-metallic wear-resistant material, and the noise-reducing part 1 is located at the striking end 201 at the end of the pawl. The noise-reducing part 1 covers the striking end 201 at the end of the pawl, so that the contact surface between the striking end 201 and the ratchet body 3 is covered by the noise-reducing part 1. In use, this embodiment not only effectively reduces the striking noise generated by the pawl striking end 201 and the ratchet body 3 when it falls from the ratchet tooth 301, but also effectively reduces the friction between the side of the pawl striking end 201 and the ratchet tooth 301 during the falling process, resulting in better noise reduction.

[0042] Example 4: Figure 4 As shown, the noise-absorbing part 1 is disposed on the pawl: In a preferred embodiment of this application, the noise-absorbing part 1 is disposed on the opposing contact surface between the pawl and the ratchet. A hole is formed in the pawl. The noise-absorbing part 1 includes a spring and a buffer portion, which are located within the hole of the pawl. One end of the spring is fixedly connected to the pawl, and the other end is fixedly connected to the buffer portion. During the rotation of the pawl and ratchet, when the pawl falls from the ratchet tooth 301 end of the ratchet, the noise-absorbing part 1 contacts the ratchet body 3 before the pawl. The spring and buffer portion effectively buffer the impact, significantly reducing the noise generated by the pawl striking the ratchet body 3.

[0043] Example 5: Figure 5As shown, the noise-absorbing part 1 is disposed on the pawl: In a preferred embodiment of this application, the noise-absorbing part 1 is disposed on the opposing contact surface of the pawl and the ratchet. The noise-absorbing part 1 is a buffer spring disposed on the pawl. The buffer spring is integrally connected with the pawl. The buffer spring has a certain elasticity. During the operation of the pawl and the ratchet, when the pawl falls from the ratchet tooth 301 of the ratchet, the buffer spring contacts the ratchet body 3 before the pawl. After contact, the buffer spring plays a buffering role and gradually fits against the pawl, effectively reducing the impact force during the process of the pawl falling from the ratchet tooth 301, thereby effectively reducing the noise generated during the collision between the pawl and the ratchet.

[0044] Example 6: As Figure 6 As shown, the noise-reducing part 1 is disposed on the ratchet: In a preferred embodiment of this application, the ratchet is composed of a ratchet body 3, a noise-reducing part 1 covered thereon with a high-strength non-metallic wear-resistant material, and ratchet teeth 301. In this embodiment, the pawl can achieve a good noise reduction effect when it contacts the ratchet at any angle, and the non-metallic layer can protect the ratchet body 3 and reduce its wear.

[0045] Example 7: Figure 7 As shown, the muffler 1 is disposed on the ratchet: In a preferred embodiment of this application, the ratchet as a whole is composed of a ratchet body 3, mufflers 1 located on both sides of the ratchet body 3, and ratchet teeth 301. The outer contour dimension of the muffler 1 is larger than the outer contour dimension of the ratchet body 3. This embodiment facilitates the replacement and repair of worn parts and reduces maintenance costs.

[0046] In a preferred embodiment of this example 7, holes are formed in the ratchet body 3, which cooperate with the noise-absorbing parts 1 located on both sides to achieve a firm adhesion between the ratchet body 3 and the noise-absorbing parts 1 on both sides, avoiding a hollow state. This increases the adhesion of non-metallic materials, prevents them from falling off, and avoids abnormal noise caused by internal hollowness, further improving the quality and reliability of the product.

[0047] Example 8: As Figure 8 As shown, the muffler 1 is disposed on the ratchet: In a preferred embodiment of this application, the ratchet is composed of a ratchet body 3 and ratchet teeth 301. The ratchet body 3 is provided with the muffler 1, which is located in the area below the tooth step of the ratchet teeth 301. This embodiment provides a buffer against the impact of the pawl, reduces the impact stress, and avoids the muffler material from directly meshing with the highly worn tooth surface, focusing more on the muffler function and extending the service life of the muffler 1.

[0048] The combination of the silent ratchet mechanism embodiments of the present application: those skilled in the art can understand that the above-mentioned embodiments 1-8 can be combined in any way. For example, embodiments 1, 2, etc. can be used alone to reduce noise; or one of embodiments 1-5 can be combined with one of embodiments 6-8. All these combinations can achieve the silent purpose of the present application. Therefore, the present application not only protects each embodiment itself, but also protects the technical solutions formed by any combination of the above-mentioned embodiments.

[0049] As a preferred embodiment of the present application, the high-strength non-metal wear-resistant material of the sound-absorbing part 1 can be selected from silicone rubber, ultra-high molecular weight polyethylene, polyformaldehyde, etc. The selection of the high-strength non-metal wear-resistant material of the sound-absorbing part 1 is not specifically limited.

[0050] As a preferred embodiment of the present application, the ratchet and the pawl are made of metal or non-metal materials. When the sound-absorbing part 1 is coated on the pawl body 2 or the ratchet body 3 and the pawl or the ratchet is made of the same material as the sound-absorbing part 1, the pawl or the ratchet is integrally formed with the sound-absorbing part 1.

[0051] Those skilled in the art can understand that the pawl body 2 and the ratchet body 3 can be made of metal or non-metal materials. For example, the pawl body 2 or the ratchet body 3 is made of non-metal materials. As a preferred embodiment of the present application, when the sound-absorbing part 1 is coated on the pawl body 2 or the ratchet body 3, the pawl body 2 and the ratchet body 3 can be made of the same material as the sound-absorbing part 1 and integrally formed by one-step forming process. Since the sound-absorbing part 1 is made of the same material as the main body and is seamlessly combined, the interface stress or abnormal sound caused by the difference in thermal expansion coefficient of different materials is avoided. At the same time, the integrated structure can uniformly transfer the load and reduce stress concentration, thereby improving the running noise reduction effect of the ratchet and the ratchet tooth, and improving the overall structural strength.

[0052] In other embodiments, the pawl body 2 and the ratchet body 3 can also partially use metal matrix and be combined with the non-metal wear-resistant sound-absorbing part 1 by insert injection molding process or other methods to retain the metal properties in specific areas that require extremely high strength.

[0053] The specific material used for the pawl body 2 and the ratchet body 3 is not specifically limited in the present application.

[0054] For example, the pawl body 2 and the ratchet body 3 can be made of metal materials, such as steel, aluminum, etc. The sound-absorbing part 1 can be made of non-metal materials, such as silicone rubber, ultra-high molecular weight polyethylene, polyformaldehyde, etc. Figure 28As shown: in the mute ratchet mechanism, the pawl and the ratchet can also be arranged as the ratchet and the pawl meshing in the application, the ratchet body 3 inner circle is provided with a ratchet tooth 301, the pawl body 2 hitting end 201 is located in the ratchet inside, and is matched with the ratchet tooth 301, so as to realize one-way rotation and locking. The inner meshing structure has the advantages of compact structure and small size. In order to realize the mute operation, in the embodiment, the contact part of at least one of the ratchet and the pawl is provided with a silencer 1, which is the core means of reducing the meshing impact and noise.

[0055] The skilled in the art should understand that the above-mentioned inner meshing form is only one specific embodiment for realizing the mute effect of the application, and is not a limitation on the protection scope of the application. Without departing from the core principle of the application (i.e. reducing the ratchet and pawl hitting noise by setting the silencer 1), the pawl and the ratchet can also adopt the form of outer meshing or inner meshing. Whether outer meshing or inner meshing, any scheme that uses the silencer 1 on the contact part of at least one of the ratchet and the pawl to achieve the mute effect should fall within the protection scope of the application.

[0056] Embodiment 9: as shown in Figure 9 and Figure 11 As shown: as a preferred embodiment of the application, the movable part 5 is composed of a coupling 9 in the embodiment, the coupling 9 is provided with an internal thread, the internal thread is located at the end of the coupling 9 close to the shaft body 4, the other end of the coupling 9 is provided with an output connecting part 901, which is used for connecting with the transmission shaft, the coupling 9 is also provided with a positioning part 903, which is opened towards the internal thread side, the positioning part 903 is movably positioned with the end part of the shaft body 4, so as to realize the movement of the shaft body 4 in the positioning part 903 through the cooperation of the first threaded part 401 and the internal thread along the axial direction.

[0057] As shown in Figure 10As shown: the outer wall of the coupling 9 is fixedly connected with a limiting piece 12, which can be fixedly connected with the outer wall of the coupling 9 through a threaded connection, so as to facilitate disassembly and maintenance of parts. The shaft body 4 is provided with a limiting ring groove 405 between the first threaded portion 401 and the end portion of the shaft body 4. The limiting piece 12 passes through the outer wall of the coupling 9 and cooperates with the limiting ring groove 405 to limit the movement stroke of the movable part 5. The outer wall of the coupling 9 is provided with an annular groove, and the limiting piece 12 is located in the annular groove. The annular groove is provided with a retainer 13, which forms a fixed clamping on the limiting piece 12. The retainer 13 itself has a slight elasticity, and is provided with an opening. By applying tension to both ends of the opening of the retainer 13, the opening of the retainer 13 can be expanded to insert the limiting piece 12 into the limiting ring groove 405. When the tension on both sides of the opening of the retainer 13 is removed, the retainer 13 is reset due to its own elasticity. At this time, the retainer 13 clamps the limiting piece 12 in the limiting ring groove 405, effectively preventing the limiting piece 12 from loosening due to high-frequency vibration and thus separating from the coupling 9, which affects the operation of the device. The design is safer and more stable. The coupling 9 not only has the functions of internal threads, positioning portions 903 and output connection portions 901, but also has limiting pieces 12 to limit the movement stroke of the movable part 5. The overall structure is simplified, the number of parts and the assembly complexity are reduced, and the manufacturing cost is effectively reduced. The cooperation between the limiting piece 12 and the limiting ring groove 405 is fixed by the retainer 13, which ensures the stability of the limiting piece 12 under high-frequency vibration and avoids the failure of the limiting stroke function due to loosening, so that the shaft body 4 and the movable part 5 are separated from each other. This embodiment further improves the reliability and service life of the capstan brake device, ensures the instantaneity of brake response, and has a more compact overall structure and stronger compatibility. It can adapt to various types of transmission shafts, expand the application range, and meet the lightweight design trend.

[0058] As shown in Figure 12 When the inner threads of the coupling 9 are threadedly rotated with the first threaded portion 401, when the coupling 9 moves away from the shaft body 4, the limiting piece 12 is located in the limiting ring groove 405 during the movement. At this time, the limiting ring groove 405 gradually approaches the limiting piece 12 near the end portion of the shaft body 4, until the limiting piece 12 abuts against the groove wall of the limiting ring groove 405. At this time, the limiting piece 12 limits the relative separation movement stroke of the coupling 9 and the shaft body 4. At this time, the coupling 9 and the shaft body 4 cannot continue to move away from each other through threaded rotation.

[0059] Embodiment 10: as shown in Figure 15-17As shown: as a preferred embodiment of the present application, a shaft coupling 9 is arranged at the end of the shaft body 4, an output connecting portion 901 is arranged at one end of the shaft coupling 9, the shaft coupling 9 is connected with the movable part 5, the shaft coupling 9 is matched with the movable part 5 to realize the transmission connection between the shaft body 4 and the shaft coupling 9, a positioning portion 903 is further arranged in the shaft coupling 9, and the positioning portion 903 is matched with the shaft body 4 for positioning. A meshing portion 902 is arranged at the end of the shaft coupling 9 away from the output connecting portion 901, the movable part 5 is inserted and matched with the meshing portion 902 to realize the transmission connection between the shaft coupling 9 and the movable part 5. The sliding meshing portion 902 ensures the centration and stability of the movable part 5 during the axial movement, and reduces the risk of jamming. The precise circumferential positioning with the shaft body 4 is realized, the synchronization and accuracy of power transmission are ensured, and the axial sliding cooperation provides the necessary freedom for the braking action. When the brake is released or operated, the shaft coupling 9 is ensured to slide smoothly and stably in the axial direction. The shaft coupling 9 greatly simplifies the structure, and has the functions of output, positioning and sliding, effectively reducing the number of parts and the axial installation space. The movable part 5 can be selected as a nut, a threaded column or other components with internal threads.

[0060] As shown in Figure 13-14 and Figure 23-24 , the limiting portion includes a limiting nut 6 and a stop washer 601, the limiting nut 6 is threadedly matched with a second threaded portion 402 arranged on the shaft body 4, the stop washer 601 is arranged between the limiting nut 6 and the shaft body 4, and the stop washer 601 is installed in cooperation with a stop groove 403 arranged on the shaft body 4. The embodiment provides a double-protected anti-loosening mechanism.

[0061] The stop washer 601 includes stop angles 611 at the inner and outer circles of the stop washer 601, respectively, the stop angle 611 at the inner circle cooperates with the stop groove 403 for stopping, and the stop angle 611 at the outer circle is bent after the limiting nut 6 is tightened and is matched with a limiting groove 602 arranged on the limiting nut 6. The inner and outer stop angles 611 of the stop washer 601 are respectively matched into the stop groove 403 and the limiting groove 602, which can effectively prevent the nut from rotating and loosening in a vibrating environment, has high reliability, simple structure and low cost.

[0062] As a preferred embodiment of the present application, the output connecting portion 901 is arranged in the shaft coupling 9, and the output connecting portion 901 is matched with and transmission-connected with a transmission shaft.

[0063] As a preferred embodiment of the present application, the output connecting portion 901 is arranged on the outer circumferential surface of the shaft coupling 9, and the output connecting portion 901 is a toothed structure.

[0064] Embodiment 11: as shown in Figure 25 and Figure 27As shown: as a preferred embodiment of the present application, further comprising a shaft coupling 9 arranged at the end of the shaft body 4, the shaft coupling 9 is provided with an output connecting part 901 at one end, the shaft coupling 9 is connected with the movable part 5, the shaft coupling 9 is matched with the movable part 5 to realize the transmission connection between the shaft body 4 and the shaft coupling 9, and the shaft coupling 9 is further provided with a positioning part 903, which is matched with the shaft body 4. The shaft coupling 9 is integrally connected with the movable part 5, a side groove is provided in the middle of the shaft coupling 9, and a limiting part is arranged in the side groove to limit the relative movement stroke of the movable part 5 and the first threaded part 401 when they are threadedly matched, and the positioning part 903 is provided in the shaft coupling 9.

[0065] As shown: Figure 26 The limiting part includes a limiting sleeve 7 and a fixed stopper 701, the limiting sleeve 7 is sleeved on the shaft body 4, the limiting sleeve 7 is arranged in the side groove and close to one end of the first threaded part 401, and the fixed stopper 701 is inserted on the shaft body 4, which is matched with the limiting sleeve 7 to form a limiting. This embodiment avoids the wear and loosening of the threaded pair, and is particularly suitable for working conditions that require frequent axial sliding or have high requirements for anti-loosening, and has a longer service life. And the limiting sleeve 7 is fixedly connected with the movable part 5, so as to realize integrated design.

[0066] As shown: Figure 21 And Figure 22 As a preferred embodiment of the present application, further comprising a rotation-stopping washer 8 and a rotation-stopping flat square 404 provided on the shaft body 4, the rotation-stopping washer 8 and the rotation-stopping flat square 404 are arranged at one end of the first threaded part 401 away from the limiting part, the rotation-stopping washer 8 is provided with a rotation-stopping surface 801 at the inner circle, which is matched with the rotation-stopping flat square 404 to realize rotation-stopping, and effectively prevent the ratchet from slipping when it is pressed tightly. As a preferred embodiment of the present application, a plurality of holes 802 are provided on the rotation-stopping washer 8, which are located on the side of the rotation-stopping washer 8 facing the ratchet. The holes 802 are used to store lubricating substances such as lubricating oil, which can effectively reduce the friction between the ratchet and the rotation-stopping washer 8, and further reduce the noise generated during the rotation of the ratchet.

[0067] As shown: Figure 18-19As a preferred embodiment of the application, the winch brake device of the application is arranged between the driving device and the speed reduction device, the shaft body 4 is the output shaft of the driving device, and the brake force generated during braking is only the torque of the motor. In the prior art, when braking occurs, the brake force usually acts on the support, resulting in a higher strength requirement for the support. In the present application, the entire winch brake device is integrated on the output end of the motor, which has the beneficial effect of optimizing the force transmission path. The brake force transmitted to the external support is very small, which greatly reduces the material strength and machining precision requirements of the external fixed structure such as the support, achieving compact and lightweight design. The pawl seat includes a fixed support on the motor device, a shaft pin on the winch brake device, a torsional spring, a shaft pin, and a fixed plate. The fixed plate has a sliding shaft pin hole and a fixed through hole. The shaft pin installs the pawl and the torsional spring on the fixed plate through the sliding pin hole on the fixed plate, and the fixed plate is fixed and locked on the fixed support through the bolt passing through the fixed through hole. The fixed plate is designed in a whole circular shape, which increases the strength and stability of the fixed plate. The beneficial effect of the fixed plate designed in a whole circular shape is that compared with a non-closed or non-circular structure, it has better mechanical properties, can uniformly disperse stress, effectively resist deformation, and thus significantly increase the strength of the mounting point and the stability of the entire mechanism.

[0068] The ratchet mechanism is arranged in the drum. The beneficial effect of arranging the ratchet mechanism in the drum is to achieve double sound insulation: first, the sound is reduced by the sound reduction part 1 from the sound source, and second, the drum structure physically shields and absorbs sound, further ensuring that noise is not leaked out, meeting the application requirements of high-quiet occasions.

[0069] As shown in Figure 20 As a preferred embodiment of the application, the winch brake device of the application can also be arranged in the gear reduction device, the shaft body 4 is a shaft body that rotates synchronously with the transmission shaft, and the winch brake device is located at the end of the gear reduction device. The coupling 9 has a toothed structure on the outer peripheral surface at the output connection part 901, which is used to mesh with the reduction gear in the gear reduction device. The silent ratchet mechanism is arranged at the end of the shaft body 4 away from the transmission shaft to achieve rotation of the winch brake device through the gear reduction device when the transmission shaft is not rotating and the drum is rotating, thereby achieving braking.

[0070] When the winch brake device of the application is installed at the output end of the driving device, when the driving mechanism operates in the first direction, the movable part 5 rotates away from the one end of the shaft body 4 far from the output end through the first threaded part 401, and gradually presses the ratchet mechanism during the rotation process, drives the ratchet wheel to rotate in the same direction as the direction allowed by the ratchet wheel and the pawl to form, realizes the transmission of power to the shaft body 4, and then to the transmission shaft through the shaft coupling 9. When the pawl rotates to the tooth step position of the ratchet teeth 301 of the ratchet wheel, the impact end 201 of the pawl falls and hits on the ratchet wheel body 3 of the ratchet wheel, and the sound reduction part 1 provided with high-strength non-metal wear-resistant material on the contact and impact part of at least one of the ratchet wheel and the pawl effectively reduces the noise generated. When the motor stops rotating during the rotation process, the shaft body 4 stops rotating at this time, and the external force is transmitted to the shaft coupling 9 through the transmission shaft to drive the movable part 5 to rotate in the opposite direction. At this time, the movable part 5 rotates away from the shaft body 4 far from the output end, and at this time, the brake is released, realizing the transmission of power to the transmission shaft. At this time, the pawl abuts against the ratchet teeth, and since the ratchet wheel is in an unpressed state and relatively moves with the shaft body 4, the ratchet wheel and the pawl do not rotate synchronously at this time, and no noise is generated. When the driving mechanism stops operating, the external force is transmitted to the movable part 5 through the transmission shaft and the shaft coupling 9 to drive the movable part 5 to rotate in the opposite direction. At this time, the movable part 5 presses the ratchet wheel to drive the ratchet wheel to rotate in the direction not allowed by the ratchet wheel and the pawl to form, that is, to generate brake.

[0071] When the driving mechanism operates in the second direction opposite to the first direction, the shaft body 4 drives the movable part 5 to rotate, and at this time, the movable part 5 moves away from the ratchet wheel during the rotation process and moves towards the limiting part. At this time, the brake is released, realizing the transmission of power to the transmission shaft. At this time, the pawl abuts against the ratchet teeth, and since the ratchet wheel is in an unpressed state and relatively moves with the shaft body 4, the ratchet wheel and the pawl do not rotate synchronously at this time, and no noise is generated. When the driving mechanism stops operating, the external force is transmitted to the movable part 5 through the transmission shaft and the shaft coupling 9 to drive the movable part 5 to rotate in the opposite direction. At this time, the movable part 5 presses the ratchet wheel to drive the ratchet wheel to rotate in the direction not allowed by the ratchet wheel and the pawl to form, that is, to generate brake.

[0072] It is apparent to those skilled in the art that the application is not limited to the details of the foregoing exemplary embodiments, and that the application can be implemented in other specific forms without departing from the spirit or essential characteristics of the application. Therefore, the embodiments should be considered in all respects as illustrative and not restrictive. The scope of the application is defined by the appended claims rather than the foregoing description, and therefore all changes that come within the meaning and range of equivalents of the claims are intended to be embraced therein. Any reference signs in the claims should not be construed as limiting the claims to the figures in which the reference signs are used.

[0073] Furthermore, it should be understood that although the specification is described in terms of embodiments, not every embodiment includes every feature described. The specification can include implicit combinations of explicitly mentioned features and / or explicit combinations of implicitely mentioned features. Each embodiment depends on the explicit combinations of features and / or the implicit combinations of features made specifically within that embodiment, and each such embodiment can be combined with every other such embodiment to create further embodiments.

Claims

1. A silent ratchet mechanism, comprising a pawl seat, a ratchet and a pawl that cooperate with each other, characterized in that, At least one of the ratchet and the pawl has a sound-absorbing part (1) on its contact portion. The pawl consists of a pawl body (2) and a striking end (201) located at the end of the pawl. The silencing part (1) is disposed on the pawl in one of the following ways: The noise-absorbing part (1) covers the pawl body (2); The silencing part (1) is embedded in the striking end (201) and forms an integral structure with the pawl body (2); The silencing part (1) covers the striking end (201) and the contact surface between the striking end (201) and the ratchet; The noise-reducing part (1) is provided on the opposing contact surface of the pawl and the ratchet; or The ratchet consists of a ratchet body (3) and ratchet teeth (301), and the noise-reducing part (1) is disposed on the ratchet in one of the following ways: The noise-reducing part (1) is provided on both sides of the ratchet body (3); The noise-reducing part (1) is provided on the outer peripheral surface of the ratchet body (3), and the noise-reducing part (1) is located below the tooth step of the ratchet (301).

2. The silent ratchet mechanism according to claim 1, characterized in that: The silencing part (1) covering the pawl body (2), the silencing part (1) located at the striking end (201), the silencing part (1) covering the ratchet body (3), the silencing parts (1) located on both sides of the ratchet body (3), and the silencing part (1) located on the outer peripheral surface of the ratchet body (3) and below the tooth step of the ratchet tooth (301) are all made of non-metallic materials.

3. A silent ratchet mechanism according to claim 2, characterized in that: The outer contour dimension of the noise-silencing part (1) located on both sides of the ratchet body (3) is larger than the outer contour dimension of the ratchet body (3).

4. A silent ratchet mechanism according to claim 1, characterized in that: The ratchet and pawl are made of metal or non-metal materials. When the silencing part (1) covers the pawl body (2) or the ratchet body (3) and the pawl or ratchet and the silencing part (1) are made of the same material, the ratchet or pawl and the silencing part (1) are integrally formed.

5. A winch brake device based on a silent ratchet mechanism, comprising the silent ratchet mechanism as described in any one of claims 1-4, characterized in that, Also includes: Shaft (4), the silent ratchet mechanism is provided on the shaft (4), the shaft (4) is provided with a first threaded part (401), the thread direction of the first threaded part (401) toward the silent ratchet mechanism is matched with the locking and limiting rotation direction formed by the ratchet and pawl; The movable part (5) is threadedly engaged with the first threaded part (401); The limiting part restricts the movement stroke of the movable part (5).

6. A winch brake device based on a silent ratchet mechanism according to claim 5, characterized in that: The movable part (5) includes a coupling (9), which has an internal thread located at one end of the coupling (9) near the shaft (4). The other end of the coupling (9) has an output connection part (901) for connecting to the drive shaft. The coupling (9) also has a positioning part (903) facing the thread. The positioning part (903) is movably positioned with the end of the shaft (4) so ​​that the shaft (4) can move axially within the positioning part (903) through the engagement of the first thread part (401) and the internal thread.

7. A winch brake device based on a silent ratchet mechanism according to claim 6, characterized in that: A limiting member (12) is fixedly connected to the outer wall of the coupling (9). A limiting ring groove (405) is opened on the shaft (4). The limiting ring groove (405) is located between the first threaded part (401) and the end of the shaft (4). The limiting member (12) passes through the outer wall of the coupling (9) and cooperates with the limiting ring groove (405), thereby limiting the relative movement stroke of the movable part (5) when it is threadedly engaged with the first threaded part (401).

8. A winch brake device based on a silent ratchet mechanism according to claim 7, characterized in that: The coupling (9) has an annular groove on its outer wall, and the limiting member (12) is located in the annular groove. A protective ring (13) is provided on the annular groove, and the protective ring (13) forms a fixed clamp on the limiting member (12).

9. A winch brake device based on a silent ratchet mechanism according to claim 5, characterized in that: It also includes a coupling (9) located at the end of the shaft (4). One end of the coupling (9) is provided with an output connection part (901). The coupling (9) is connected to the movable part (5). The coupling (9) and the movable part (5) cooperate to realize the transmission connection between the shaft (4) and the coupling (9). The coupling (9) is also provided with a positioning part (903). The positioning part (903) is positioned and cooperates with the shaft (4).

10. A winch brake device based on a silent ratchet mechanism according to claim 9, characterized in that: The coupling (9) has a meshing part (902) at one end away from the output connection part (901). The movable part (5) is inserted into the meshing part (902) to realize the transmission connection between the coupling (9) and the movable part (5).

11. A winch brake device based on a silent ratchet mechanism according to claim 9, characterized in that: The coupling (9) is integrally connected to the movable part (5). A side groove is provided through the middle of the coupling (9). The limiting part is located in the side groove to limit the relative movement stroke of the movable part (5) when it is threadedly engaged with the first threaded part (401). The positioning part (903) is provided through the coupling (9).

12. A winch brake device based on a silent ratchet mechanism according to claim 11, characterized in that: The limiting part includes a limiting sleeve (7) and a fixing stop (701). The limiting sleeve (7) is sleeved on the shaft (4). The limiting sleeve (7) is located in the side groove and near one end of the first threaded part (401). The fixing stop (701) is inserted into the shaft (4). The fixing stop (701) cooperates with the limiting sleeve (7) to form a limiting position.

13. A winch brake device based on a silent ratchet mechanism according to claim 9, characterized in that: The output connection part (901) is located inside the coupling (9), and the output connection part (901) is matched with the drive shaft and connected for transmission.

14. A winch brake device based on a silent ratchet mechanism according to claim 9, characterized in that: The output connection part (901) is provided on the outer peripheral surface of the coupling (9), and the output connection part (901) has a toothed structure.

15. A winch brake device based on a silent ratchet mechanism according to claim 14, characterized in that: The braking device is located at the end of the deceleration device. The toothed structure of the output connection part (901) meshes with the deceleration gear in the deceleration device. The shaft (4) is connected to the transmission shaft. The silent ratchet mechanism is located at the end of the shaft (4) away from the transmission shaft.

16. A winch brake device based on a silent ratchet mechanism according to claim 5, characterized in that: The limiting part includes a limiting nut (6) and a stop washer (601). The limiting nut (6) is threadedly engaged with a second threaded part (402) provided on the shaft (4). The stop washer (601) is provided between the limiting nut (6) and the shaft (4). The stop washer (601) is installed in conjunction with a stop groove (403) opened on the shaft (4).

17. A winch brake device based on a silent ratchet mechanism according to claim 16, characterized in that: The stop washer (601) includes a stop angle (611), which is located at the inner and outer rings of the stop washer (601). The stop angle (611) at the inner ring cooperates with the stop groove (403) to stop, and the stop angle (611) at the outer ring bends after the limit nut (6) is tightened and engages with the limit groove (602) opened on the limit nut (6).

18. A winch brake device based on a silent ratchet mechanism according to claim 5, characterized in that: It also includes an anti-rotation washer (8) and an anti-rotation flat (404) formed on the shaft (4). The anti-rotation washer (8) and the anti-rotation flat (404) are located at the end of the first threaded portion (401) away from the limiting portion. The anti-rotation washer (8) has an anti-rotation surface (801) on its inner ring. The anti-rotation surface (801) cooperates with the anti-rotation flat (404) to achieve anti-rotation.

19. A winch brake device based on a silent ratchet mechanism according to claim 18, characterized in that: The anti-rotation washer (8) has several holes (802) on it, and the holes (802) are located on the side of the anti-rotation washer (8) facing the ratchet.

20. A winch brake device based on a silent ratchet mechanism according to claim 19, characterized in that: The winch brake device is located between the drive device and the deceleration device, the shaft (4) is the output shaft of the drive device, and the pawl and pawl seat are connected to the output end bracket of the drive device.

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