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CN-224201092-U - Rotary speed reducer for hydraulic accessory

CN224201092UCN 224201092 UCN224201092 UCN 224201092UCN-224201092-U

Abstract

The utility model relates to the technical field of speed reducers, and discloses a rotary speed reducer for hydraulic accessories, which comprises a base, a shell arranged at the end part of the base and a rotary support arranged in the shell, wherein the rotary support comprises an inner ring body and an outer ring body which are rotationally connected through rolling bodies, the inner ring body is fixed with the shell through bolts, a lubricating gap exists between the periphery of the outer ring body and the inner wall of the shell and is sealed through a framework oil seal, and a hydraulic motor for driving the outer ring body to rotate is arranged on the side part of the base. According to the utility model, the inner ring body of the slewing bearing is fixed with the shell, the outer ring body is meshed with the gear driven by the hydraulic motor, so that a transmission mode of 'fixed inner ring plus rotary outer ring' is formed, actual measurement data shows that the transmission efficiency of the design reaches more than 90%, the design is improved by 50% compared with a traditional worm gear reducer, the shaking amplitude is less than or equal to 0.5 degrees under the vertical transmission working condition, and the requirement of hydraulic accessory on accurate rotation is met.

Inventors

  • WANG RUI
  • WU DELIN
  • ZHANG YONGMENG
  • TANG WEI
  • GU ZHEN

Assignees

  • 马鞍山经纬新能源传动设备有限公司

Dates

Publication Date
20260505
Application Date
20250701

Claims (9)

  1. 1. The rotary speed reducer for the hydraulic accessory comprises a base (1), a shell (2) arranged at the end part of the base (1) and a rotary support (3) arranged in the shell (2), and is characterized in that, The slewing bearing (3) comprises an inner ring body (31) and an outer ring body (32) which are rotationally connected through rolling bodies, the inner ring body (31) is fixed with the shell (2) through bolts, and a lubricating gap exists between the periphery of the outer ring body (32) and the inner wall of the shell (2) and is sealed through a framework oil seal (4); the side part of the base (1) is provided with a hydraulic motor (5) for driving the outer ring body (32) to rotate.
  2. 2. The rotary speed reducer for hydraulic accessories according to claim 1, characterized in that the inside of the base (1) is provided with a cavity communicated with the shell (2), the output end of the hydraulic motor (5) extends into the cavity and is provided with a gear (6), the periphery of the outer ring body (32) is provided with a toothed ring which is arranged in a centering way, and the toothed ring is meshed with the gear (6).
  3. 3. The rotary speed reducer for hydraulic accessory according to claim 2, wherein one end periphery of the outer ring body (32) is provided with an annular step, the toothed ring is fixedly sleeved on the periphery of the annular step, and a lubrication gap formed by the other end periphery of the outer ring body (32) and the inner wall of the shell (2) is matched with the framework oil seal (4).
  4. 4. The rotary speed reducer for hydraulic attachment according to claim 1, wherein a retainer ring (7) is provided between the inner ring body (31) and the outer ring body (32), one end of the retainer ring (7) is engaged with an inner peripheral surface of the outer ring body (32), and the other end of the retainer ring (7) is overlapped on an end surface of the inner ring body (31).
  5. 5. The rotary speed reducer for hydraulic attachment according to claim 4, wherein the retainer ring (7) comprises a retainer ring body (71), one end of the retainer ring body (71) is mounted on the inner peripheral surface of the outer ring body (32) in a clamped manner, the other end of the retainer ring body (71) is flush with the inner peripheral surface of the outer ring body (32) and is provided with an annular shielding part (72), and the cross section of the annular shielding part (72) is triangular, and one end far from the retainer ring body (71) is inclined toward the center of the inner ring body (31) and is overlapped with the end surface of the inner ring body (31).
  6. 6. The rotary speed reducer for hydraulic attachment according to claim 5, wherein an annular groove adapted to the retainer body (71) is provided on the inner peripheral surface of the outer ring body (32), the retainer body (71) has anti-slip portions (73) on both side end surfaces, and the anti-slip portions (73) are in close contact with the inner wall of the annular groove.
  7. 7. The rotary speed reducer for hydraulic accessory according to claim 1, wherein a seal groove opposite to the end face of the inner ring body (31) is provided on the inner wall of the housing (2), a seal ring (8) is provided on one side end face of the inner ring body (31), and the seal ring (8) is in interference fit with the seal groove.
  8. 8. The rotary speed reducer for hydraulic accessory according to claim 7, characterized in that a clamping groove (9) opposite to the end face of the inner ring body (31) is formed in the inner wall of the shell (2), a clamping block (10) matched with the clamping groove (9) is mounted on one side end face of the inner ring body (31), a sealing groove is formed in the inner wall of the clamping groove (9), and a groove for accommodating the sealing ring (8) is formed in the clamping block (10).
  9. 9. The rotary speed reducer for hydraulic accessory according to claim 1, wherein an annular track groove (12) opposite to the end face of the inner ring body (31) is formed in the inner wall of the shell (2), a ball (11) which is matched with and corresponds to the annular track groove (12) is mounted on the end face of one side, far away from the framework oil seal (4), of the outer ring body (32), and the outer ring body (32) is movably connected with the annular track groove (12) through the ball (11).

Description

Rotary speed reducer for hydraulic accessory Technical Field The utility model relates to the technical field of speed reducers, in particular to a rotary speed reducer for hydraulic tools. Background Along with the rapid development of social construction, the engineering machinery industry also makes great progress, and more stringent requirements are put forward on the flexibility and the multifunction of the excavator, so that various professional accessories emerge like spring bamboo shoots after rain for meeting the requirements, and the hydraulic wrist accessory has been widely focused on with the unique multifunction. In the field of engineering machinery, such as hydraulic accessory application scenes of equipment such as an excavator, a loader and the like, the defects of the traditional worm gear speed reducer are more remarkable, and the method specifically comprises the following steps: 1. low transmission efficiency and serious energy loss The transmission efficiency of the traditional worm gear reducer is usually only 40%, the energy loss is remarkable under the working conditions of frequent start-stop and heavy-load operation of hydraulic accessories, for example, when a mine excavator uses the traditional reducer to drive a breaking hammer, the input power of a hydraulic system is 50kW, the actual output power is only 20kW, the extra 30kW energy is converted into heat energy, the temperature of the reducer is greatly increased, a cooling system is required to be additionally configured, the equipment cost is increased, and meanwhile, the high energy consumption increases the fuel consumption of the equipment; 2. poor vertical transmission stability and insufficient operation precision The traditional worm gear speed reducer is easy to shake obviously when the vertical direction is transmitted, the shaking amplitude can reach +/-3 degrees, the operation precision is seriously influenced, when a hydraulic grab bucket is used for pipeline laying in a certain municipal engineering, the locating deviation of the grab bucket is large due to shaking of the speed reducer, multiple adjustment operations are needed, the single-section pipeline laying time is prolonged, the whole construction period is delayed, larger economic loss is caused, in addition, in a precise operation scene (such as excavating of a document), shaking of the traditional speed reducer can even lead to damage of the cultural relics, and great safety risks exist. In order to solve the problems, the application provides a rotary speed reducer for hydraulic accessories. Disclosure of utility model In order to solve the technical problems in the background technology, the utility model provides a rotary speed reducer for a hydraulic accessory. The utility model provides a rotary speed reducer for hydraulic accessory, which comprises a base, a shell arranged at the end part of the base and a rotary support arranged in the shell; The slewing bearing comprises an inner ring body and an outer ring body which are rotationally connected through rolling bodies, the inner ring body is fixed with the shell through bolts, a lubricating gap exists between the periphery of the outer ring body and the inner wall of the shell, and the outer ring body is sealed through a framework oil seal; the side part of the base is provided with a hydraulic motor for driving the outer ring body to rotate; Aiming at the problems of low transmission efficiency and easy shaking of vertical transmission of the traditional worm gear reducer, the design adopts a slewing bearing to replace the traditional structure, an inner ring body is fixed with a shell, an outer ring body is driven by a hydraulic motor to form a transmission mode of 'fixed inner ring + rotating outer ring', the transmission efficiency is effectively improved, a lubrication clearance is matched with a framework oil seal, the formation of a lubrication film is ensured, leakage is prevented, and the actual leakage amount is reduced; The speed reducer can be adapted to the pressure of a hydraulic system of 10-35MPa, the output rotating speed of 0-150rpm, the hydraulic accessory requirements of various engineering machinery such as an excavator, a loader and the like are met, and in different working conditions such as municipal construction, mining and the like, the equipment adaptation rate reaches more than 90% by replacing slewing bearings and hydraulic motors with corresponding specifications, so that the application range of the speed reducer is remarkably expanded compared with that of a traditional single-function speed reducer. As a further optimized scheme of the utility model, a cavity communicated with the shell is formed in the base, the output end of the hydraulic motor extends into the cavity and is provided with a gear, the periphery of the outer ring body is provided with a centrally arranged toothed ring, and the toothed ring is in meshed connection with the gear; The gear is meshe