CN102311063B - Dry-type braking device for lifting hoist speed reducer - Google Patents

Abstract

A dry braking device for a hoisting hoist reducer, including a support plate and a motor connecting plate, a cylindrical cylinder body is arranged inside the support disk, a brake hub is arranged at the inner side of the cylinder body, and a flower is arranged in the cylinder body. A cylindrical piston is arranged between the key sleeve, the spline sleeve and the cylinder body, and a plurality of axial blind holes are evenly distributed on the circumferential surface of the outer end of the piston. Springs are arranged in the axial blind holes, and the outer end of the piston is arranged There is a gland, the inner end of the piston is provided with dynamic and static friction plates arranged alternately, the spline sleeve is processed with external teeth, the brake hub is processed with internal teeth, the inner side of the dynamic and static friction plates is provided with a baffle plate, and the baffle plate and A skeleton oil seal is installed between the input shafts of the reducer; the cylinder wall is provided with axial holes and radial oblique holes, and the middle part of the brake hub is provided with radial air holes; It is equipped with a sealing assembly to prevent oil from entering the dynamic and static friction plates and from leaking out. The utility model has the advantages of simple structure, strong adaptability, compactness and reasonableness, high reliability, long service life and convenient disassembly and assembly.

Description

Dry braking device for hoisting hoist reducer

technical field

The invention relates to a braking device, in particular to a dry multi-disc friction braking device used for a hoisting hoist reducer.

Background technique

The brake is the key component of the drum-reducer assembly, which plays an important role in ensuring the safe and reliable hoisting operation of the truck crane. At present, the brakes of the drum-reducer assembly used on the active truck cranes mainly have the following problems: (1) The service life and reliability are low, that is, the seal on the brake piston is easily damaged and seriously affects the brake. Performance, the material selection of the brake friction plate and the force of the compression spring are not suitable, so that the brake wears quickly and the braking torque is insufficient; (2) Disassembly and assembly is time-consuming and laborious, which not only affects the assembly efficiency and quality, but also is not convenient for on-site maintenance operations; ( 3) The structure is complex and the manufacturing cost is relatively high.

Contents of the invention

Technical problem: The purpose of the present invention is to overcome the deficiencies in the prior art and provide a braking device for hoisting hoisting field reducer with compact and simple structure, high reliability, and easy disassembly and assembly.

Technical solution: The dry braking device of the hoisting reducer of the present invention includes a support plate connected to the reducer housing in the reel, and a motor connecting plate is provided at the inner opening on the left side of the support plate. A cylindrical cylinder body is arranged inside the support plate, a brake hub is arranged at the inner end of the cylinder body, and a spline sleeve sleeved on the input shaft of the reducer is arranged in the cylinder body. There is a cylindrical piston, and a plurality of axial blind holes are evenly distributed on the peripheral surface of the outer end of the piston. Springs are arranged in the axial blind holes, and the outer end of the piston is provided with a pressure clamp fixed between the motor connection plate and the cylinder body. The inner end of the piston is provided with alternately arranged dynamic and static friction plates, the spline sleeve is processed with external teeth meshing with the dynamic friction plates, and the brake hub is processed with internal teeth meshing with the static friction plates. 1. There is a baffle plate on the inside of the static friction plate, and a skeleton oil seal is installed between the baffle plate and the input shaft of the reducer; the cylinder wall of the cylinder block is provided with an axial hole and a radial Slanted hole, the middle part of the brake hub is provided with a radial air hole, and the inner and outer sides between the cylinder and the piston are respectively provided with sealing components to prevent oil from entering the dynamic and static friction plates and from leaking out.

There are 10-16 axial blind holes arranged on the left end surface of the piston; the number of springs is the same as or different from the number of axial blind holes.

Beneficial effects: due to the adoption of the above technical scheme, a skeleton oil seal is set on the input shaft of the reducer, and a sealing assembly is set between the cylinder body and the piston, which can effectively prevent the oil from entering the brake friction plate, and its production The dynamic torque is large, the braking reliability is high, and the wear debris or pollution particles generated by the braking friction are not easy to enter between the piston and the cylinder, which can significantly improve the reliability of the sealing assembly; There are two blind holes for placing brake springs, and the braking torque can be adjusted by increasing or decreasing the number of brake springs, so that the brake device has strong adaptability; because the brake hub, cylinder body and support disc are uniform As an independent part, it is easy to process and manufacture, and greatly improves the convenience of disassembly and assembly, reduces the manufacturing cost, can effectively increase the braking friction surface, and reduce the contact stress of the braking friction, thereby improving the wear resistance of the friction plate life. Its structure is simple, compact and reasonable, high reliability, long service life, convenient disassembly and assembly, and has wide practicability.

Description of drawings

Fig. 1 is a structural diagram of the dry braking device of the hoisting hoist reducer of the present invention.

In the figure: 1-Gland; 2-Piston; 3-Cylinder; 4-I sealing assembly; 5-II sealing assembly; 6-Brake hub; 10-stop plate; 11-reducer; 12-skeleton oil seal; 13-reducer housing; 14-reel; 15-support plate; 16-motor connection plate;

Detailed ways

An embodiment of the present invention will be further described below in conjunction with accompanying drawing:

As shown in Figure 1, the dry braking device of the hoisting hoist reducer is located inside the reel 14 and is connected to the reducer 11 located inside the reel 14. It is mainly composed of a gland 1, a piston 2, a cylinder 3. The sealing assembly, the brake hub 6, the friction plate, the baffle plate 10, the spring 17 and the spline sleeve 18 are composed. The cylinder body 3 is a cylindrical structure, and its inner hole is two sections of through holes with different diameters, and an axial hole and a radial oblique hole for brake fluid circulation are processed on the cylinder wall. The piston 2 is placed in the inner hole of the cylinder body 3, and the I seal assembly 4 and the II seal assembly 5 composed of an O-ring and a back-up ring are installed on both sides between the piston 2 and the cylinder body 3; the left end of the piston 2 is along the shaft There are 10 to 16 blind holes processed uniformly, and the number of springs 17 configured according to the braking torque is placed in the blind holes. The number of springs 17 can be increased or decreased according to the needs of the braking torque. The number of springs 17 and The number of axial blind holes is the same or different. The brake hub 6 has a cylindrical structure, and an axial gear hole and a radial vent hole 7 are processed in the brake hub 6, and a plurality of static friction plates 8 with external teeth are installed in the axial gear hole. The gland 1 is located between the motor connection plate 16 and the cylinder body 3, and both the gland 1 and the motor connection plate 16 are provided with oil passages for delivering brake fluid; the baffle plate 10 is located between the brake hub 6 and the reducer housing 13 Between the baffle plate 10 and the input shaft of the reducer 11, a skeleton oil seal 12 is installed; the motor connection plate 16, the gland 1, the cylinder body 3, the brake hub 6, the baffle plate 10, and the reducer housing 13 are mutually connected by screws. are fixedly connected together, and the reducer housing 13 is fixedly connected together with the support plate 15 fixed on the frame by screws. The spline sleeve 18 is sleeved on the input shaft of the reducer 11, and the outer cylindrical surface of its inner end is processed with outer teeth meshed with the dynamic friction plate 9 with inner teeth.

Working process and principle: When hoisting operation is required, the brake fluid is first introduced into the cylinder body through the oil passages on the motor connection plate 16, gland 1, cylinder body 3, etc., and the piston 2 is pushed to overcome the springs 17 to the left move, release the mutual pressing force between each moving friction plate 9 and each static friction plate 8, that is, the brake is released. When the lifting heavy object needs to be positioned in the air, in order to prevent the heavy object from falling, the brake pressure oil between the piston 2 and the cylinder body 3 is passed through the oil on the motor connection plate 16, gland 1, cylinder body 3, etc. The oil pressure acting on the piston 2 to the left is basically relieved, each spring 17 pushes the piston 2 to the right, and makes each dynamic friction plate 9 and each static friction plate 8 press together, and the splines are made by friction force The sleeve 18 and the brake hub 6 are fixed together, and the reel 14 is fixed by the speed reducer 11 simultaneously.

Claims (1)

1. dry-type braking device for lifting hoist speed reducer, device comprises and is located at the step disk (15) that is connected with reducer shell (13) in reel (14), the internal orifice place, left side of step disk (15) is provided with motor and connects dish (16), it is characterized in that: be provided with columnar cylinder body (3) in described step disk (15), the medial extremity of cylinder body (3) is provided with brake hub (6), be provided with the spline housing (18) that is socketed on reductor (11) input shaft in cylinder body (3), be provided with columnar piston (2) between spline housing (18) and cylinder body (3), be evenly equipped with a plurality of axial blind holes on the external side end periphery of piston (2), be provided with spring (17) in axial blind hole, the outer end of piston (2) is provided with to be fixed in motor and to connect gland (1) between dish (16) and cylinder body (3), the inner of piston (2) is provided with the movable friction plate with internal tooth (9) of alternative arrangement and with the static friction sheet (8) of external tooth, be processed with the external tooth that is meshed with movable friction plate (9) with internal tooth on the inner external cylindrical surface of described spline housing (18), be processed with the axial gears hole that is meshed with static friction sheet (8) with external tooth on brake hub (6), the inboard of sound friction lining is provided with block plate (10), outside framework oil seal (12) is housed between the input shaft of block plate (10) and reductor (11), the casing wall of cylinder body (3) is provided with and connects dish (16) oil circuit with motor and be connected and enter the axial hole of fluid and inclined hole radially, and the inside and outside both sides between cylinder body (3) and piston (2) are respectively equipped with and prevent that fluid from entering the poted assemblies of dynamic and static friction lining (9,8) and external leakage.

2. dry-type braking device for lifting hoist speed reducer according to claim 1, it is characterized in that: a plurality of axial blind holes of laying on the left side of described piston (2) are 10～16.

3. dry-type braking device for lifting hoist speed reducer according to claim 1, it is characterized in that: the number of described spring (17) is identical with the number of axial blind hole or not identical.

4. dry-type braking device for lifting hoist speed reducer according to claim 1, is characterized in that: have radially breather hole (7) in described brake hub (6).

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