A torque-limiting flywheel assembly

Abstract

The present invention discloses a torque-limiting flywheel assembly, comprising: a flywheel body, an output disc and a first friction member. A second friction member for frictional transmission is provided between the first friction member and the output disc. An elastic member in a compressed state is provided on the first friction member and is used to axially press the first friction member against the second friction member so as to press the output disc. When the output disc is arranged between the first friction member and the flywheel body, the elastic member is connected to the flywheel body, and a third friction member is provided between the output disc and the flywheel body. The first friction member rotates synchronously with the flywheel body. When the first friction member is arranged between the flywheel body and the output disc, the elastic member is arranged between the flywheel body and the first friction member. A gland for pressing the output disc against the second friction member is provided on the outer side of the output disc. The third friction member is provided between the gland and the output disc. The first friction member rotates synchronously with the gland, and the gland is connected to the flywheel body. The structure of the present application is simple, small in size, light in weight and low in manufacturing cost.

Description

Technical Field

[0001] The present invention relates to the technical field of transmission devices, and more specifically, to a torque-limiting flywheel assembly. Background Art

[0002] A torque limiter is a device that reduces the impact overload vibration energy during movement to achieve the purpose of energy absorption and torque limitation, and has been widely used in many fields.

[0003] In the prior art, most of the torsional buffer torque-limiting couplings have complex structures, large volumes, heavy weights, and high prices, and are not applicable in some occasions.

[0004] In summary, how to provide a torque-limiting coupling with a simple structure, small volume, light weight, and low price to meet the needs of buffering and torque limitation is an urgent problem to be solved by those skilled in the art at present. Summary of the Invention

[0005] In view of this, the purpose of the present invention is to provide a torque-limiting flywheel assembly with a simple structure, small volume, light weight, and low price, which can meet the needs of buffering and torque limitation.

[0006] To achieve the above purpose, the present invention provides the following technical solutions:

[0007] A torque-limiting flywheel assembly includes: a flywheel body, an output disk, and a first friction member. A second friction member for frictional transmission is provided between the first friction member and the output disk. An elastic member in a compressed state is provided on the first friction member for axially pressing the first friction member against the second friction member to press the output disk.

[0008] When the output disk is disposed between the first friction member and the flywheel body, the elastic member is connected to the flywheel body, and a third friction member is provided between the output disk and the flywheel body, and the first friction member rotates synchronously with the flywheel body.

[0009] When the first friction member is disposed between the flywheel body and the output disk, the elastic member is disposed between the flywheel body and the first friction member. A pressing cover for pressing the output disk against the second friction member is provided on the outer side of the output disk. The third friction member is provided between the pressing cover and the output disk. The first friction member rotates synchronously with the pressing cover, and the pressing cover is connected to the flywheel body.

[0010] Preferably, the flywheel body includes a flywheel toroidal surface, and an annular protrusion is provided on the outer periphery of the flywheel toroidal surface. A plurality of threaded holes are evenly provided on the annular protrusion.

[0011] When the output disc is disposed between the first friction member and the flywheel body, the elastic member is connected to the threaded hole by a first bolt;

[0012] When the first friction member is disposed between the flywheel body and the output disc, the gland is connected to the threaded hole by a second bolt.

[0013] Preferably, when the output disc is disposed between the first friction member and the flywheel body, the flywheel body is provided with a first annular step surface, and the third friction member is pressed against the first annular step surface;

[0014] When the first friction member is disposed between the flywheel body and the output disc, the flywheel body is provided with a second annular step surface, and the elastic member is pressed against the second annular step surface.

[0015] Preferably, the outer diameter of the elastic member is greater than the outer diameter of the second annular step surface. A protective cover is provided between the gland and the end face of the threaded hole. The protective cover includes an inner ring and an outer ring. The outer ring is disposed between the gland and the end face of the threaded hole, and the inner ring is pressed against the inner end face of the elastic member that exceeds the second annular step surface.

[0016] Preferably, when the output disc is disposed between the first friction member and the flywheel body, at least one first groove is provided on the inner wall of the annular protrusion, and the outer periphery of the first friction member is provided with first flanges that are equal in number to and are in one-to-one matching connection with the first grooves.

[0017] Preferably, when the first friction member is disposed between the flywheel body and the output disc, a plurality of second grooves are provided on the gland, and the outer periphery of the first friction member is provided with second flanges that are equal in number to and are in one-to-one matching connection with the second grooves.

[0018] Preferably, both the second friction member and the third friction member are friction discs.

[0019] Preferably, when the output disc is disposed between the first friction member and the flywheel body, the end face of the threaded hole is an inclined surface, and the distance between the outer periphery of the inclined surface and the flywheel body is longer than the distance between the inner periphery of the inclined surface and the flywheel body.

[0020] Preferably, the output disc includes an inner disc and an outer disc, and the inner disc and the outer disc are connected by riveting or welding.

[0021] Preferably, the elastic member is a disc spring.

[0022] When the wear between the first friction member, the second friction member and the output disc increases, a gap will be generated between the first friction member, the second friction member and the output disc, and slippage will occur between the first friction member, the second friction member and the output disc, reducing the output efficiency. Since the elastic member in this application is in a compressed state and stores elastic potential energy itself, when the wear between the first friction member, the second friction member and the output disc increases, the elastic member will release the elastic potential energy and continue to press the first friction member, the second friction member and the output disc, thereby prolonging the service life of the torque-limiting flywheel assembly; in addition, since the flywheel body and the first friction member, the second friction member, and the output disc are in frictional transmission, when the input torque is large, the torque input by the first friction member increases, causing slippage between the first friction member and the second friction member, avoiding fracture accidents caused by rigid connection, and meeting the need for buffering and torque limitation; moreover, the structure of this application is simple, small in size, light in weight, and low in manufacturing cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for the description of the embodiments or the prior art. Obviously, the drawings in the following description are only the embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained according to the provided drawings.

[0024] Figure 1 Schematic diagram of the first embodiment of the torque-limiting flywheel assembly provided by the present invention;

[0025] Figure 2 Schematic diagram of the second embodiment of the torque-limiting flywheel assembly provided by the present invention;

[0026] Figure 3 Schematic diagram of the flywheel assembly in the first embodiment of the torque-limiting flywheel assembly provided by the present invention;

[0027] Figure 4 Schematic diagram of the first friction member in the first embodiment of the torque-limiting flywheel assembly provided by the present invention;

[0028] Figure 5 Schematic diagram of the disc spring provided by the present invention;

[0029] Figure 6 Schematic diagram of the structure in which the output disc is split provided by the present invention.

[0030] Figures 1-6 Where:

[0031] 1 - elastic member, 2 - second friction member, 3 - first friction member, 4 - flywheel body, 5 - output disc, 6 - third friction member, 7 - gland, 8 - cover, 9 - first groove, 10 - first flange, 11 - rivet. Detailed implementation manners

[0032] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0033] The core of the present invention is to provide a torque-limiting flywheel assembly with a simple structure, small volume, light weight, and low price, which can meet the needs of buffering and torque limitation.

[0034] Please refer to Figures 1 to 6 , Figure 1 which is a schematic diagram of the first embodiment of the torque-limiting flywheel assembly provided by the present invention; Figure 2 which is a schematic diagram of the second embodiment of the torque-limiting flywheel assembly provided by the present invention; Figure 3 which is a schematic diagram of the flywheel assembly in the first embodiment of the torque-limiting flywheel assembly provided by the present invention; Figure 4 which is a schematic diagram of the first friction member in the first embodiment of the torque-limiting flywheel assembly provided by the present invention; Figure 5 which is a schematic diagram of the disc spring provided by the present invention; Figure 6 which is a schematic diagram of the split output disc structure provided by the present invention.

[0035] A torque-limiting flywheel assembly includes: a flywheel body 4, an output disc 5, and a first friction member 3. A second friction member 2 for frictional transmission is provided between the first friction member 3 and the output disc 5. An elastic member 1 in a compressed state is provided on the first friction member 3 for axially pressing the first friction member 3 against the second friction member 2 to press the output disc 5;

[0036] When the output disc 5 is arranged between the first friction member 3 and the flywheel body 4, the elastic member 1 is connected to the flywheel body 4, and a third friction member 6 is provided between the output disc 5 and the flywheel body 4. The first friction member 3 rotates synchronously with the flywheel body 4;

[0037] When the first friction member 3 is arranged between the flywheel body 4 and the output disc 5, the elastic member 1 is arranged between the flywheel body 4 and the first friction member 3. A pressing cover 7 for pressing the output disc 5 against the second friction member 2 is provided on the outer side of the output disc 5. The third friction member 6 is arranged between the pressing cover 7 and the output disc 5. The first friction member 3 rotates synchronously with the pressing cover 7, and the pressing cover 7 is connected to the flywheel body 4.

[0038] It should be noted that the flywheel body 4, the output disc 5, the first friction member 3, the second friction member 2, and the third friction member 6 are all provided as annular disc shapes. The center of the flywheel body 4 is provided with a central hole for inputting power as a driving member, and the center of the output disc 5 is provided with a central hole for outputting power as a driven member.

[0039] When the output disc 5 is arranged between the first friction member 3 and the flywheel body 4, the first friction member 3 rotates synchronously with the flywheel body 4. Under the pressing action of the elastic member 1, the elastic member 1 presses the first friction member 3 to generate frictional force. The first friction member 3 drives the second friction member 2 to rotate, and the second friction member 2 drives the output disc 5 to rotate, thereby transmitting power. In order to increase the frictional force between the flywheel and the output disc 5, a third friction member 6 is arranged between the flywheel and the output disc 5 to prevent slipping.

[0040] When the first friction member 3 is arranged between the flywheel body 4 and the output disc 5, the gland 7 rotates synchronously with the flywheel body 4. The gland 7 drives the first friction member 3 to rotate synchronously. Under the pressing action of the elastic member 1, frictional force is generated between the first friction member 3 and the second friction member 2, driving the second friction member 2 to rotate, and the second friction member 2 drives the output disc 5 to rotate. In order to increase the frictional force between the output disc 5 and the gland 7, a third friction member 6 is arranged between the gland 7 and the output disc 5 to prevent slipping.

[0041] When the wear between the first friction member 3, the second friction member 2, and the output disc 5 increases, a gap will be generated between the first friction member 3, the second friction member 2, and the output disc 5, and slipping will occur between the first friction member 3, the second friction member 2, and the output disc 5, reducing the output efficiency. Since the elastic member 1 in this application is in a compressed state and stores elastic potential energy by itself, when the wear between the first friction member 3, the second friction member 2, and the output disc 5 increases, the elastic member 1 will release the elastic potential energy and continue to press the first friction member 3, the second friction member 2, and the output disc 5, thereby prolonging the service life of the torque-limiting flywheel assembly; in addition, since the flywheel body 4 and the first friction member 3, the second friction member 2, and the output disc 5 are in frictional transmission, when the input torque is large, the torque input by the first friction member 3 increases, causing slipping between the first friction member 3 and the second friction member 2, avoiding the fracture accident caused by rigid connection, and meeting the need for buffering and torque limitation; moreover, the structure of this application is simple, small in size, light in weight, and low in manufacturing cost.

[0042] On the basis of the above embodiments, as a further preference, the flywheel body 4 includes a flywheel ring surface, and an annular protrusion is provided on the outer periphery of the flywheel ring surface. A plurality of threaded holes are evenly provided on the annular protrusion;

[0043] When the output disc 5 is arranged between the first friction member 3 and the flywheel body 4, the elastic member 1 is connected to the threaded hole through the first bolt;

[0044] When the first friction member 3 is disposed between the flywheel body 4 and the output disc 5, the gland 7 is connected to the threaded hole by a second bolt.

[0045] It should be noted that the outer periphery of the elastic member 1 is provided with first notches having the same number as the threaded holes, each first notch corresponding to a threaded hole, and the first notch and the threaded hole are connected by a first bolt. Second notches are provided on the outer periphery of the gland 7, each second notch corresponding to a threaded hole, and the second notch and the threaded hole are connected by a second bolt. By providing the threaded holes to connect the flywheel body 4 and the elastic member 1 or to connect the flywheel body 4 or the gland 7, disassembly and assembly can be facilitated. When the first friction member 3, the second friction member 2, the third friction member 6, and the output disc 5 are severely worn and the elastic member 1 is insufficient to press and transmit, they can be replaced in time.

[0046] On the basis of the above embodiments, as a further preference, when the output disc 5 is disposed between the first friction member 3 and the flywheel body 4, the flywheel body 4 is provided with a first annular step surface, and the third friction member 6 is pressed against the first annular step surface;

[0047] When the first friction member 3 is disposed between the flywheel body 4 and the output disc 5, the flywheel body 4 is provided with a second annular step surface, and the elastic member 1 is pressed against the second annular step surface.

[0048] It should be noted that when the output disc 5 is disposed between the first friction member 3 and the flywheel body 4, providing the first annular step surface can reduce the contact area between the flywheel body 4 and the third friction member 6, thereby reducing the volume of the third friction member 6. Similarly, when the first friction member 3 is disposed between the flywheel body 4 and the output disc 5, providing the second annular step surface can reduce the contact area between the flywheel body 4 and the elastic member 1, thereby reducing the volume of the elastic member 1.

[0049] On the basis of the above embodiments, as a further preference, the outer diameter of the elastic member 1 is greater than the outer diameter of the second annular step surface, and a protective cover 8 is provided between the gland 7 and the end face of the threaded hole. The protective cover 8 includes an inner ring and an outer ring. The outer ring is disposed between the gland 7 and the end face of the threaded hole, and the inner ring presses against the inner end face of the elastic member 1 exceeding the second annular step surface.

[0050] It should be noted that an annular groove is provided between the second annular step surface and the annular protrusion. The inner ring of the gland 7 is recessed into the annular groove. The inner ring and the outer ring are arranged in parallel. The outer ring is disposed between the pressing rod and the end face of the threaded hole, so that the inner ring serves as a fulcrum to support the inner end face of the elastic member 1 exceeding the second annular step surface. Under the pressing force of the gland 7, the elastic member 1 is compressed to store elastic potential energy. In this embodiment, the gland 7 is provided to support the inner end face of the elastic member 1, so that more choices are available for the size of the elastic member 1.

[0051] On the basis of the above embodiments, as a further preference, when the output disc 5 is arranged between the first friction member 3 and the flywheel body 4, at least one first groove 9 is provided on the inner wall of the annular protrusion, and the outer periphery of the first friction member 3 is provided with first flanges 10 having the same number as the first grooves 9 and being connected to the first grooves 9 in a one-to-one matching manner.

[0052] It should be noted that all the first grooves 9 are evenly arranged on the inner wall of the annular protrusion, all the first flanges 10 are evenly arranged on the outer periphery of the first friction member 3, and each first flange 10 extends into the first groove 9 in a one-to-one correspondence manner. When the first groove 9 drives the first flange 10 to move, the forces on different parts of the first friction member 3 are consistent, preventing the first friction member 3 from deforming. The first flange 10 can move axially in the first groove 9, so that when the wear between the first friction member 3, the second friction member 2 and the output disc 5 increases, the first friction member 3 can move axially to press the second friction member 2. The connection structure between the first friction member 3 and the flywheel body 4 provided in this embodiment is simple, convenient for processing, disassembly and assembly.

[0053] On the basis of the above embodiments, as a further preference, when the first friction member 3 is arranged between the flywheel body 4 and the output disc 5, the pressing cover 7 is provided with a plurality of second grooves, and the outer periphery of the first friction member 3 is provided with second flanges having the same number as the second grooves and being connected to the second grooves in a one-to-one matching manner.

[0054] It should be noted that all the second grooves are evenly arranged on the pressing cover 7, all the second flanges are evenly arranged on the outer periphery of the first friction member 3, and each second flange extends into the second groove in a one-to-one correspondence manner. When the second groove drives the second flange to move, the forces on different parts of the first friction member 3 are consistent, preventing the first friction member 3 from deforming. The second flange can move axially in the second groove, so that when the wear between the first friction member 3, the second friction member 2 and the output disc 5 increases, the first friction member 3 can move axially to press the second friction member 2. The connection structure between the first friction member 3 and the pressing cover 7 provided in this embodiment is simple, convenient for processing, disassembly and assembly.

[0055] On the basis of the above embodiments, as a further preference, both the second friction member 2 and the third friction member 6 are friction plates.

[0056] It should be noted that the surfaces on both sides of the friction plate are rough processed, and the roughness can be set according to the actual application situation. The friction plate has a small volume and high transmission efficiency, so as to reduce the volume of the torque-limiting flywheel assembly and improve the transmission efficiency of the torque-limiting flywheel assembly.

[0057] On the basis of the above embodiments, as a further preference, when the output disc 5 is arranged between the first friction member 3 and the flywheel body 4, the end face of the threaded hole is an inclined surface, and the distance between the outer periphery of the inclined surface and the flywheel body 4 is longer than the distance between the inner periphery of the inclined surface and the flywheel body 4.

[0058] It should be noted that since the end face of the threaded hole is an inclined plane, when the wear between the first friction member 3, the second friction member 2 and the output disc 5 increases, the elastic member 1 releases elastic potential energy. At this time, by further tightening the first bolt, the gap between the elastic member 1 and the end face of the threaded hole can be reduced, so that the elastic member 1 further presses the first friction member 3, further increasing the service life of the torque-limiting flywheel assembly.

[0059] Based on the above embodiments, as a further preference, the output disc 5 includes an inner disc and an outer disc, and the inner disc and the outer disc are connected by riveting or welding.

[0060] It should be noted that the inner disc and the outer disc can be connected by rivets 11 or by welding. By providing different inner discs, different output members can be connected, so that the torque-limiting flywheel assembly has a wider application range.

[0061] Based on the above embodiments, as a further preference, the elastic member 1 is a disc spring.

[0062] It should be noted that the disc spring is a disc-shaped spring, the outer circumference and the inner circumference are in different planes, a conical surface is provided between the inner circumference and the outer circumference, and it can be pressed into a flat shape when axially compressed and has elasticity, and can store elastic potential energy. The disc spring is small in volume, easy to process and install, and is more suitable for the torque-limiting flywheel assembly provided in this application.

[0063] Based on the above embodiments, as a further preference, the first friction member 3 is processed from a metal material, preferably steel. The second friction member 2 and the third friction member 6 are processed from non-metallic materials.

[0064] In this specification, the various embodiments are described in a progressive manner. Each embodiment focuses on the differences from other embodiments. The same or similar parts among the various embodiments can be referred to each other.

[0065] The above has introduced the torque-limiting flywheel assembly provided by the present invention in detail. Specific examples are used herein to elaborate on the principle and implementation manner of the present invention. The description of the above embodiments is only used to help understand the method and its core idea of the present invention. It should be noted that for those of ordinary skill in the art, without departing from the principle of the present invention, several improvements and modifications can be made to the present invention, and these improvements and modifications also fall within the protection scope of the claims of the present invention.

Claims

1. A torque-limiting flywheel assembly, characterized in that, Comprising: A flywheel body (4), an output disc (5) and a first friction member (3). A second friction member (2) for frictional transmission is provided between the first friction member (3) and the output disc (5). An elastic member (1) in a compressed state is provided on the first friction member (3) for axially pressing the first friction member (3) against the second friction member (2) to press the output disc (5). The flywheel body (4) includes a flywheel toroidal surface. An annular protrusion is provided on the outer periphery of the flywheel toroidal surface, and a plurality of threaded holes are evenly provided on the annular protrusion. The output disc (5) is disposed between the first friction member (3) and the flywheel body (4). The elastic member (1) is connected to the flywheel body (4), and a third friction member (6) is provided between the output disc (5) and the flywheel body (4). The first friction member (3) rotates synchronously with the flywheel body (4). The elastic member (1) is connected to the threaded hole by a first bolt. The flywheel body (4) is provided with a first annular step surface, and the third friction member (6) is pressed against the first annular step surface. The end surface of the threaded hole is an inclined surface, and the distance between the outer periphery of the inclined surface and the flywheel body (4) is longer than the distance between the inner periphery of the inclined surface and the flywheel body (4).

2. The torque-limiting flywheel assembly according to claim 1, wherein, At least one first groove (9) is provided on the inner wall of the annular protrusion, and a plurality of first flanges (10) equal in number to the first grooves (9) and matingly connected to the first grooves (9) are provided on the outer periphery of the first friction member (3).

3. The torque-limiting flywheel assembly according to claim 1, characterized in that Both the second friction member (2) and the third friction member (6) are friction plates.

4. The torque-limiting flywheel assembly according to any one of claims 1 to 3, characterized in that, The output disc (5) includes an inner disc and an outer disc, and the inner disc and the outer disc are connected by riveting or welding.

5. The torque-limiting flywheel assembly according to claim 4, characterized in that, The elastic member (1) is a disc spring.

6. A torque-limiting flywheel assembly, characterized in that, Comprising: A flywheel body (4), an output disc (5) and a first friction member (3). A second friction member (2) for frictional transmission is provided between the first friction member (3) and the output disc (5). An elastic member (1) in a compressed state is provided on the first friction member (3) for axially pressing the first friction member (3) against the second friction member (2) to press the output disc (5). The flywheel body (4) includes a flywheel toroidal surface. An annular protrusion is provided on the outer periphery of the flywheel toroidal surface, and a plurality of threaded holes are evenly provided on the annular protrusion. The first friction member (3) is arranged between the flywheel body (4) and the output disc (5), the elastic member (1) is arranged between the flywheel body (4) and the first friction member (3), a gland (7) for pressing the output disc (5) against the second friction member (2) is arranged on the outer side of the output disc (5), a third friction member (6) is arranged between the gland (7) and the output disc (5), the first friction member (3) rotates synchronously with the gland (7), and the gland (7) is connected to the flywheel body (4); the gland (7) is connected to the threaded hole through a second bolt; the flywheel body (4) is provided with a second annular step surface, and the elastic member (1) is pressed against the second annular step surface; the outer diameter of the elastic member (1) is larger than the outer diameter of the second annular step surface, a protective cover (8) is arranged between the end surface of the gland (7) and the threaded hole, the protective cover (8) includes an inner ring and an outer ring, the outer ring is arranged between the end surface of the gland (7) and the threaded hole, and the inner ring is pressed against the inner end surface of the elastic member (1) exceeding the second annular step surface; a plurality of second grooves are arranged on the gland (7), and the outer periphery of the first friction member (3) is provided with second flanges having the same number as and matingly connected to the second grooves one by one.

7. The torque-limiting flywheel assembly according to claim 6, wherein, Both the second friction member (2) and the third friction member (6) are friction plates.

8. The torque-limiting flywheel assembly according to claim 6 or 7, characterized in that, The output disc (5) includes an inner disc and an outer disc, and the inner disc and the outer disc are connected by riveting or welding.

9. The torque-limiting flywheel assembly according to claim 8, wherein The elastic member (1) is a disc spring.

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