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CN-224229133-U - Brake for transmission

CN224229133UCN 224229133 UCN224229133 UCN 224229133UCN-224229133-U

Abstract

The utility model provides a brake for a transmission, wherein abrasion and noise generated by relative motion do not exist between a middle shaft serving as a rotating part and a brake piston in use, and noise pollution is reduced compared with the prior art. In addition, the mounting position of the dual-plate is optimized, so that the intermediate shaft can be designed into a hollow structure, the whole mass is reduced, the structure of the brake piston is simplified, the effect of reducing the processing and manufacturing difficulty is achieved, and the brake piston is suitable for industrial large-scale use and popularization.

Inventors

  • LU FEI
  • LI XINYU
  • ZHANG YADONG
  • ZHANG HAITAO
  • YIN CHONGYI
  • PENG LIYIN

Assignees

  • 陕西法士特齿轮有限责任公司

Dates

Publication Date
20260512
Application Date
20250605

Claims (7)

  1. 1. The brake for the transmission comprises a transmission shell (1) and a brake cylinder (2), wherein an air inlet (3) is formed in the brake cylinder (2), a brake piston (4) is slidably arranged in the brake cylinder (2), and an intermediate shaft (15) capable of rotating around a central shaft is arranged in the transmission, and the brake is characterized in that the transmission shell (1) is connected with the brake cylinder (2), and a plurality of mounting holes are formed in the transmission shell (1); A friction plate (6) and a pair of plates (7) are sleeved at one end of the intermediate shaft (15) close to the brake piston (4), semicircular notches (8) of the pair of plates (7) are aligned with mounting holes of the transmission shell (1) in a one-to-one correspondence manner, and a positioning pin (5) is arranged in each mounting hole; The brake piston (4) can be pressed or separated from the friction plate (6) by sliding in the brake cylinder (2); A ring empty area is formed among the brake cylinder (2), the brake piston (4) and the boss of the transmission shell (1), a gasket (9) and a compression spring (10) are arranged in the ring empty area, and the gasket (9) is arranged on the boss of the transmission shell (1).
  2. 2. Brake for a transmission according to claim 1, characterized in that the intermediate shaft (15) is a hollow shaft.
  3. 3. Brake for a transmission according to claim 1, characterized in that the outer wall of the brake piston (4) is provided with at least one sealing ring groove, in which a matching sealing ring (11) is arranged.
  4. 4. A brake for a transmission according to claim 3, characterized in that the sealing ring (11) is a lip seal.
  5. 5. A brake for a transmission according to claim 1, characterized in that the outer wall of the brake piston (4) is provided with a supporting ring groove, and the supporting ring groove is internally provided with a matched supporting ring (12).
  6. 6. Brake for a transmission according to claim 1, characterized in that a gasket (13) is arranged between the transmission housing (1) and the brake cylinder (2).
  7. 7. A brake for a transmission according to claim 1, characterized in that the intermediate shaft (15) is rotatably arranged inside the transmission by means of bearings (14).

Description

Brake for transmission Technical Field The utility model belongs to the field of speed variators, and particularly relates to a brake for a speed changer. Background In the market of commercial vehicles in recent years, the acceptance of automatic transmissions by users is continuously improved, AMT transmissions are becoming one of the main trends, and the reliability and comfort of AMT transmissions by users are also continuously improved. The brake is one of key components of the AMT transmission and is mainly used for braking the intermediate shaft when the AMT transmission is in upshift, so that the two shafts of the AMT transmission are subjected to rotational speed synchronization and gear shifting is completed. In the prior art, on one hand, the ejector pin is pressed between the brake piston and the intermediate shaft by a spring, and when the intermediate shaft rotates, as the piston is provided with a sealing ring, the resistance between the piston and the brake cylinder is larger, so that relative motion can exist between the intermediate shaft and the spring, between the spring and the ejector pin, and between the ejector pin and the brake piston, further metal friction is generated, and finally abnormal abrasion and noise are generated, so that the user is difficult to accept. On the other hand, the lightweight requirement to the gearbox is higher and higher at present, and prior art is adorned reset spring in jackshaft axle head, makes the jackshaft unable design hollow structure, makes gearbox weight increase. Disclosure of utility model The utility model aims to provide a brake for a transmission, which is used for solving the problems of loud noise and heavy self weight of the transmission in the prior art. In order to solve the technical problems, the utility model adopts the following technical scheme: the brake for the speed changer comprises a speed changer shell and a brake cylinder, wherein an air inlet is formed in the brake cylinder, a brake piston is slidably arranged in the brake cylinder, and an intermediate shaft capable of rotating around a central shaft is arranged in the speed changer; The half-round notch of the dual piece is aligned with the mounting holes of the transmission shell in a one-to-one correspondence manner, and a positioning pin is arranged in each mounting hole; The brake piston can be extruded or separated from the friction plate in a sliding manner in the brake cylinder; And a ring empty area is formed among the brake cylinder, the brake piston and the boss of the transmission shell, a gasket and a compression spring are arranged in the ring empty area, and the gasket is arranged on the boss of the transmission shell. The utility model also has the following characteristics: Further, the intermediate shaft is a hollow shaft. Further, at least one sealing ring groove is formed in the outer wall of the brake piston, and a matched sealing ring is arranged in the sealing ring groove. Further, the sealing ring is a lip-shaped sealing ring. Further, a supporting ring groove is formed in the outer wall of the brake piston, and a matched supporting ring is arranged in the supporting ring groove. Further, a gasket is arranged between the transmission shell and the brake cylinder. Further, the intermediate shaft is rotatably arranged in the transmission through a bearing Compared with the prior art, the utility model has the following technical effects: When the brake for the transmission is used, abrasion and noise generated by relative motion do not exist between the intermediate shaft serving as a rotating component and the brake piston, and compared with the prior art, noise pollution is reduced. In addition, the mounting position of the dual-plate is optimized, so that the intermediate shaft can be designed into a hollow structure, the whole mass is reduced, the structure of the brake piston is simplified, the effect of reducing the processing and manufacturing difficulty is achieved, and the brake piston is suitable for industrial large-scale use and popularization. Drawings FIG. 1 is a cross-sectional view of a brake for a transmission of the present utility model; FIG. 2 is a schematic illustration of the connection of the intermediate shaft, friction plate and dual plate in the present utility model; fig. 3 is an enlarged view of the S section in fig. 1; FIG. 4 is a schematic illustration of the transmission housing and dual plate connection of the present utility model. The meaning of each reference numeral in the figures is: 1. A transmission housing; 2, a brake cylinder, 3, an air inlet, 4, a brake piston, 5, a locating pin, 6, a friction plate, 7, a pair plate, 8, a semicircular notch, 9, a gasket, 10, a compression spring, 11, a sealing ring, 12, a support ring, 13, a gasket, 14, a bearing, 15 and a central shaft. Detailed Description All the components in the present utility model are known in the art unless otherwise specified. For example, a known co