CN212079978U

CN212079978U - Clutch with high safety

Info

Publication number: CN212079978U
Application number: CN202020793125.5U
Authority: CN
Inventors: 周森淇
Original assignee: Zhejiang Wanfutong Motor Co ltd
Current assignee: Zhejiang Wanfutong Motor Co ltd
Priority date: 2020-05-13
Filing date: 2020-05-13
Publication date: 2020-12-04
Anticipated expiration: 2030-05-13

Abstract

The utility model relates to a clutch field, aim at provides one kind and has good overload protection function, and the efficiency prevents that the clutch from the overload situation to have the heat dispersion of preferred, the clutch of safety in utilization is high. The technical scheme is as follows: the utility model provides a clutch that possesses high security, includes clutch cover body and sets up the drive mechanism in the cover body, drive mechanism includes the output shaft, the cover is equipped with friction disk, pressure disk and diaphragm spring on the output shaft in proper order, be equipped with the radiating component that can the quick release friction disk produced because of sliding friction between friction disk and the pressure disk to be equipped with overload protection subassembly on lieing in the outside output shaft of lid.

Description

Clutch with high safety

Technical Field

The utility model relates to a clutch field, concretely relates to clutch that possesses high security.

Background

The clutch is installed between an engine and a transmission, and is a member for cutting off and transmitting power between a transmission system of a device such as an automobile and the engine. During the process of engagement or disengagement of the clutch and emergency braking of the transmission system, a large amount of friction heat is generated in the clutch due to friction, if the heat is not dissipated in time, the working safety and the service life of the clutch are seriously affected, and the heat dissipation mode in the prior art cannot directly aim at a heating component of the clutch, so that the heat dissipation efficiency is low; meanwhile, during emergency braking, in order to avoid excessive friction and heat generated in the clutch due to overload, and further damage transmission parts in the clutch, overload protection is usually arranged on an output shaft of the clutch to prevent the clutch from being overloaded, and a mode of limiting the friction torque of the output shaft is usually adopted to protect the clutch in the prior art, but the mode has relatively large loss, frequent maintenance and relatively high maintenance cost.

Disclosure of Invention

An object of the utility model is to provide a clutch that possesses high security, this clutch have good overload protection function, and the overload situation appears in the clutch is prevented to the efficiency to have the heat dispersion of preferred, the application safety factor of clutch is high.

In order to realize the purpose of the utility model, the utility model adopts the technical proposal that: the utility model provides a clutch that possesses high security, includes clutch cover body and sets up the drive mechanism in the cover body, drive mechanism includes the output shaft, the cover is equipped with friction disk, pressure disk and diaphragm spring on the output shaft in proper order, be equipped with the radiating component that can the quick release friction disk produced because of sliding friction between friction disk and the pressure disk to be equipped with the overload protection subassembly that prevents output shaft overload and damage the friction disk on the output shaft that lies in the cover body outside.

The heat dissipation assembly comprises a heat dissipation plate which is coaxial with the friction plate, a plurality of inner cavities are arranged in the heat dissipation plate along the radial direction, an annular opening is formed in the middle of the wall surface of one side, away from the friction plate, of the heat dissipation plate, annular bulges are arranged on the edges of the annular openings, and a plurality of air guide sheets are arranged in the bulges; a plurality of fan-shaped openings corresponding to the inner cavity are formed in the side wall, opposite to the friction disc, of the heat dissipation disc, heat absorption sheets are embedded in the fan-shaped openings and attached to the heat dissipation disc; the side wall of the heat absorbing sheet positioned in the inner cavity is connected with a plurality of radiating fins, and the axial side wall of the radiating disc is provided with a plurality of exhaust holes.

The radiating fin comprises a fan-shaped copper sheet, a plurality of copper strips are arranged on the copper sheet, and the copper strips are porous.

And a heat dissipation port is arranged on the cover body of the clutch.

The overload protection assembly comprises a ring body coaxially arranged outside the output shaft, a plurality of connecting rods extending along the radial direction of the ring body are arranged on the side wall of the ring body, and one ends of the connecting rods far away from the ring body are connected to the outer wall of a bearing sleeved outside the output shaft; a driven disc is arranged on one side, away from the connecting rod, of the ring body, the section of the driven disc is U-shaped, the ring body is inserted into the driven disc, and a connecting shaft is fixedly connected to the middle of one side, away from the ring body, of the driven disc;

the end part of the output shaft is provided with an installation sleeve, the outer wall of the installation sleeve is provided with a plurality of pairs of connecting lugs, the connecting lugs are connected with first springs, the first springs are all connected to a T-shaped telescopic column, a plurality of through holes are formed in the ring body, the side wall of the driven disc opposite to the ring body is provided with a limiting groove, and the head part of the telescopic column penetrates through the through holes and is clamped in the limiting groove;

the inner wall of the through hole is provided with a circle of limiting convex ribs, the telescopic column is sleeved with a second spring, and two ends of the second spring are respectively abutted between the limiting convex ribs and the telescopic column.

The inner wall of the through hole is provided with threads, an external thread sleeve penetrates through the through hole, the external thread sleeve and the through hole form thread fit, and the telescopic column penetrates through the external thread sleeve; and a nut is fixedly arranged at the end part of the external thread sleeve positioned outside the through hole.

The beneficial effects of the utility model are concentrated and are embodied in: the utility model has good overload protection function, can effectively prevent the clutch from overload, and has high safety factor; meanwhile, the heat dissipation assembly is arranged between the friction disc and the pressure plate, so that heat generated on the friction disc can be directly and quickly taken away, the damage to parts in the clutch due to overhigh temperature of the friction disc is avoided, the use safety factor of the clutch is further improved, the service life of the clutch is longer, and the practicability is high; secondly radiator unit and overload protection subassembly simple structure, simple to operate, the maintenance of being convenient for.

Drawings

FIG. 1 is a schematic view of the overall structure of the present invention;

FIG. 2 is an enlarged view of portion A of the structure shown in FIG. 1;

fig. 3 is a side view of the overload protection assembly of the present invention;

FIG. 4 is a view from the B-B direction of the structure shown in FIG. 3;

fig. 5 is an enlarged view of the portion C of the structure shown in fig. 4.

Detailed Description

In order to make those skilled in the art better understand the technical solution of the present invention, the present invention will be further described in detail with reference to the accompanying drawings and specific embodiments.

As shown in fig. 1-5, a clutch with high safety comprises a clutch cover 1 and a transmission mechanism arranged in the cover 1, the transmission mechanism comprises an output shaft 2 and a flywheel 0 arranged on one side of the output shaft 2, a friction disc 3, a pressure plate 4 and a diaphragm spring 5 are sequentially sleeved on the output shaft 2, the pressure plate 4 enables the friction disc 3 to compress or separate the flywheel 0 under the action of the diaphragm spring 5, and then the connection and the separation of the transmission mechanism are realized, during the engaging and disengaging processes, the friction disc 3 and the flywheel 0 will rotate relatively, sliding friction will occur between the two, a great deal of heat will be generated on the friction disc 3, if the heat is not dissipated in time, the safety of the clutch will be affected, in order to avoid the above conditions, therefore, a heat dissipation component capable of quickly releasing heat generated by the friction disc 3 due to sliding friction is arranged between the friction disc 3 and the pressure plate 4;

specifically, as shown in fig. 2 and 3, the heat dissipation assembly includes a heat dissipation plate 6 coaxially disposed with the friction plate 3, the heat dissipation plate 6 is also disposed on the output shaft 2 in a penetrating manner, the heat dissipation plate 6 is connected with the friction plate 3 by bolts, so as to ensure that the heat dissipation plate 6 and the friction plate 3 can rotate synchronously, a plurality of inner cavities 7 are radially disposed inside the heat dissipation plate 6, in this embodiment, four cavities are disposed, each cavity is partitioned, the partitioned area is that the heat dissipation plate 6 is a solid, so that the heat dissipation plate 6 has a certain pressure-bearing capacity, an annular opening 8 is disposed in the middle of a wall surface of one side of the heat dissipation plate 6, which is far away from the friction plate 3, annular protrusions 9 are disposed at edges of the annular opening 8, and a plurality of air guide fins 10 are disposed in the protrusions 9; the side wall of the heat dissipation plate 6 opposite to the friction plate 3 is provided with a plurality of fan-shaped openings corresponding to the inner cavity 7, heat absorption sheets 11 are embedded in the fan-shaped openings, in the embodiment, the heat absorption sheets 11 are heat conduction silicone sheets, the heat conduction silicone sheets have high heat conductivity and excellent heat conductivity, the service temperature is wide, the service stability is good, heat generated on the friction plates can be quickly absorbed, and the heat absorption sheets 11 are attached to the heat dissipation plate 6; the side wall of the heat absorbing sheet 11 inside the inner cavity 7 is connected with a plurality of radiating fins, and the axial side wall of the radiating disc 6 is provided with a plurality of exhaust holes 15.

When the friction disc 3 is jointed with the flywheel, the heat generated by the sliding friction between the friction disc and the flywheel can be quickly transferred to the heat-conducting silicone grease sheet and then gradually transferred to the radiating fins; during engagement, the friction discs 3 will rotate and will gradually increase in speed until they are synchronised with the flywheel; in the rotation process of the friction disc 3, the heat dissipation disc 6 also rotates along with the friction disc 3, so that the air guide sheet 10 on the heat dissipation disc 6 is equivalent to a fan when rotating, and air with lower outside temperature can be blown into the heat dissipation box; after airflow is formed in the heat dissipation box, heat on the heat dissipation fins can be taken away quickly, and the heat dissipation efficiency is improved; in this embodiment, the heat dissipation assembly is directly installed between the friction disc 3 and the pressure plate 4, so that the installation and the replacement are convenient, the assembly can directly act on the friction disc 3, and the heat dissipation performance is stronger.

Further, in order to further enhance the heat dissipation efficiency of the heat dissipation fins and facilitate the installation of the heat dissipation fins in the heat dissipation plate 6, the heat dissipation fins include a fan-shaped copper sheet 12, a plurality of copper bars 13 are arranged on the copper sheet 12, the copper bars 13 are porous, and the heat dissipation fins in this embodiment can also be made of materials with good heat dissipation performance, such as aluminum.

Furthermore, a heat dissipation port 14 is formed in the cover body 1 of the clutch, so that hot air exhausted from the heat dissipation disc 6 can be conveniently exhausted out of the clutch.

Because the output torque of the clutch is limited, when the load on the output shaft 2 is overlarge, the friction disc 3 is damaged, and the output shaft 2 positioned outside the cover body 1 is provided with an overload protection component;

specifically, as shown in fig. 4 and 5, the overload protection assembly includes a ring body 16 coaxially disposed outside the output shaft 2, a plurality of connecting rods 17 extending along the radial direction of the ring body 16 are disposed on the side wall of the ring body 16, preferably three connecting rods 17 are employed, 90 ° is formed between two adjacent connecting rods, one end of each connecting rod 17 is connected to the ring body 16 through a bolt, one end of each connecting rod 17 far from the ring body 16 is connected to the outer wall of a bearing sleeved outside the output shaft 2, and the connecting rods 17 are fixedly connected to the outer wall of the bearing through welding; a driven disc 18 is arranged on one side, away from the connecting rod 17, of the ring body 16, the section of the driven disc 18 is U-shaped, the ring body 16 is inserted into the driven disc 18, a connecting shaft 19 is fixedly connected to the middle of one side, away from the ring body 16, of the driven disc 18, and a load transmission is mounted on the connecting shaft 19, so that the clutch can be output in a limited torque manner by controlling the connection or separation between the ring body 16 and the driven disc 18, the overload protection of the clutch is realized, and the safe operation of the clutch can be guaranteed;

the mounting sleeve 20 is arranged on the end portion of the output shaft 2, the mounting sleeve 20 is connected with the output shaft 2 through splines, a plurality of pairs of connecting lugs 21 are arranged on the outer wall of the mounting sleeve 20, in the embodiment, two pairs of connecting lugs 21 are preferably adopted, each pair of connecting lugs 21 is provided with two connecting lugs, and the included angle of each pair of two connecting lugs 21 is 90-100 degrees; the connecting lugs 21 are connected with first springs 22, the number of the first springs 22 corresponds to that of the connecting lugs 21 one by one, one ends, far away from the connecting lugs 21, of the first springs 22 are connected to a T-shaped telescopic column 23, the ring body 16 is provided with a plurality of through holes 24, and the side wall, opposite to the ring body 16, of the driven plate 18 is provided with a limiting groove 25; therefore, in the embodiment, the number of the telescopic columns 23 is two, the telescopic columns are in circular symmetry, and the telescopic columns 23 are positioned among the three connecting rods 17; two first springs 22 are arranged on each telescopic column 23 to adapt to the positive and negative rotation of the output shaft 2, the number of the through holes 24 and the limiting grooves 25 is two, and the head of each telescopic column 23 penetrates through the through hole 24 and is clamped in the limiting groove 25; when the telescopic rod is clamped in the limiting groove 25, the first spring 22 is in a stretching state, and the second spring 26 is in a compressing state; when the load on the connecting shaft 19 is gradually increased, the moment of the output shaft 2 is also increased, at this time, one first spring 22 is stretched, the other spring is contracted, when the elastic force of the first spring 22 is increased to a certain value, the telescopic column 23 is pulled out from the through hole 24, the second spring 26 is continuously compressed, and the head of the telescopic column 23 gradually slides out of the limiting groove 25; when the load exceeds the maximum load of the clutch, the head of the telescopic column 23 is separated from the limiting groove 25, the ring body 16 and the driven disc 18 can rotate relatively, abrasion to all parts of the assembly is relatively small, and when the output shaft 2 is started, the first spring 22 has a dynamic buffering effect, the starting impact force is reduced, the safe operation of the clutch can be guaranteed, and the safety factor of the clutch is further improved.

Furthermore, in order to adjust the maximum limit moment value, a thread is arranged on the inner wall of the through hole 24 and an external thread sleeve 27 is arranged in a penetrating manner, the external thread sleeve 27 and the through hole 24 form a thread fit, the telescopic column 23 is arranged in the external thread sleeve 27 in a penetrating manner, two ends of the second spring 26 respectively abut against the head of the telescopic column 23 and the external thread sleeve 27, which is equivalent to replacing the limit rib in the previous embodiment with the external thread sleeve 27, a nut is fixedly arranged at the end part of the external thread sleeve 27 positioned outside the through hole 24, and the compression amount of the second spring 26 is changed by adjusting the external thread sleeve 27, so that the limit moment value is adjusted, and the structure is simple and the universality is strong; when the amount of compression of the second spring 26 is adjusted, the spring force generated by the second spring 26 is larger than the spring force generated by the first spring 22 when the clutch is not in operation.

It should be noted that, for simplicity of description, the above-mentioned embodiments of the method are described as a series of acts or combinations, but those skilled in the art should understand that the present application is not limited by the order of acts described, as some steps may be performed in other orders or simultaneously according to the present application. Further, those skilled in the art should also appreciate that the embodiments described in the specification are preferred embodiments and that the acts and elements referred to are not necessarily required in this application.

Claims

1. A clutch that possesses high security, includes clutch lid (1) and sets up the drive mechanism in lid (1), its characterized in that: the transmission mechanism comprises an output shaft (2), a friction disc (3), a pressure plate (4) and a diaphragm spring (5) are sequentially sleeved on the output shaft (2), a heat dissipation assembly capable of quickly releasing heat generated by the friction disc (3) due to sliding friction is arranged between the friction disc (3) and the pressure plate (4), and an overload protection assembly for preventing the output shaft (2) from being overloaded to damage the friction disc (3) is arranged on the output shaft (2) outside the cover body (1).

2. A clutch with high safety according to claim 1, characterized in that: the heat dissipation assembly comprises a heat dissipation plate (6) which is coaxial with the friction plate (3), a plurality of inner cavities (7) are radially arranged in the heat dissipation plate (6), an annular opening (8) is formed in the middle of the wall surface of one side, away from the friction plate (3), of the heat dissipation plate (6), annular protrusions (9) are arranged on the edges of the annular opening (8), and a plurality of air guide sheets (10) are arranged in the protrusions (9); a plurality of fan-shaped openings corresponding to the inner cavity (7) are formed in the side wall, opposite to the friction disc (3), of the heat dissipation disc (6), heat absorption sheets (11) are embedded in the fan-shaped openings, and the heat absorption sheets (11) are attached to the heat dissipation disc (6); the heat absorbing sheet (11) is connected with a plurality of radiating fins on the side wall positioned in the inner cavity (7), and a plurality of exhaust holes (15) are formed in the axial side wall of the radiating disc (6).

3. A clutch with high safety according to claim 2, characterized in that: the radiating fin comprises a fan-shaped copper sheet (12), a plurality of copper strips (13) are arranged on the copper sheet (12), and the copper strips (13) are porous.

4. A clutch with high safety according to claim 2, characterized in that: the cover body (1) of the clutch is provided with a heat dissipation port (14).

5. A clutch with high safety according to claim 1, characterized in that: the overload protection assembly comprises a ring body (16) coaxially arranged outside the output shaft (2), a plurality of connecting rods (17) radially extending along the ring body (16) are arranged on the side wall of the ring body (16), and one ends, far away from the ring body (16), of the connecting rods (17) are connected to the outer wall of a bearing sleeved outside the output shaft (2); a driven disc (18) is arranged on one side, away from the connecting rod (17), of the ring body (16), the section of the driven disc (18) is U-shaped, the ring body (16) is inserted into the driven disc (18), and a connecting shaft (19) is fixedly connected to the middle of one side, away from the ring body (16), of the driven disc (18);

the end part of the output shaft (2) is provided with a mounting sleeve (20), the outer wall of the mounting sleeve (20) is provided with a plurality of pairs of connecting lugs (21), the connecting lugs (21) are connected with first springs (22), the first springs (22) are connected to a T-shaped telescopic column (23), a plurality of through holes (24) are formed in the ring body (16), a limiting groove (25) is formed in the side wall of the driven disc (18) opposite to the ring body (16), and the head part of the telescopic column (23) penetrates through the through holes (24) and is clamped in the limiting groove (25);

the inner wall of the through hole (24) is provided with a circle of limiting convex ribs, the telescopic column (23) is sleeved with a second spring (26), and two ends of the second spring (26) are respectively abutted between the limiting convex ribs and the telescopic column (23).

6. The clutch with high safety as claimed in claim 5, wherein: the inner wall of the through hole (24) is provided with threads, an external thread sleeve (27) penetrates through the through hole, the external thread sleeve (27) and the through hole (24) form thread fit, and the telescopic column (23) penetrates through the external thread sleeve (27); a nut is fixedly arranged at the end part of the external thread sleeve (27) positioned outside the through hole (24).