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CN-122014822-A - Worm speed reduction transmission device

CN122014822ACN 122014822 ACN122014822 ACN 122014822ACN-122014822-A

Abstract

The invention discloses a worm reduction transmission device which comprises a shell component, a main worm component, an auxiliary worm component and a side-shaft component, wherein the main worm component and the auxiliary worm component are arranged in the shell component. The speed reduction ratio adjusting assembly comprises a driving gear ring and a driven gear ring, the driving gear ring is fixedly connected with the input half shaft, the driven gear ring is fixedly connected with the output half shaft, a plurality of first transmission gears are uniformly distributed along the inner periphery of the driving gear ring and meshed with the driving gear ring, a plurality of second transmission gears are uniformly distributed along the inner periphery of the driven gear ring and meshed with the driven gear ring, eccentric wheels are arranged on the first transmission gears, adjusting grooves are arranged on the eccentric wheels, shaft rods are slidably arranged in the adjusting grooves, electromagnetic blocks are arranged at two ends of the adjusting grooves and on the shaft rods, the positions of the shaft rods in the adjusting grooves are controlled by the electromagnetic blocks to change the eccentricity, so that the continuous adjustment of the transmission ratio is realized, the large speed reduction ratio and the self-locking characteristic of worm transmission are maintained, and the requirements of load change and speed adjustment are met.

Inventors

  • ZHU ZHIQIANG
  • YAO CHAOYING
  • ZHU ZHIYONG
  • WEI BINHUA

Assignees

  • 东莞市阿巴斯精密传动科技有限公司

Dates

Publication Date
20260512
Application Date
20260205

Claims (10)

  1. 1. A worm reduction transmission device, comprising a housing assembly (10), a main worm assembly (20) and an auxiliary worm assembly (30) arranged inside the housing assembly (10), and a half-shaft assembly (40), characterized in that, The half shaft component (40) consists of an input half shaft and an output half shaft, the reduction ratio adjusting component (50) comprises a driving gear ring (501) and a driven gear ring (502), the driving gear ring (501) is fixedly connected with the input half shaft, the driven gear ring (502) is fixedly connected with the output half shaft, A plurality of first transmission gears (503) are uniformly distributed along the inner periphery of the driving gear ring (501) and meshed with the driving gear ring, a plurality of second transmission gears (504) are uniformly distributed along the inner periphery of the driven gear ring (502) and meshed with the driven gear ring, Wherein, the The eccentric gear (505) is arranged on the first transmission gear (503), the eccentric gear (505) is provided with an adjusting groove (506), the shaft lever (507) is slidably arranged in the adjusting groove (506), electromagnetic blocks (508) are arranged at two ends of the adjusting groove (506) and on the shaft lever (507), and the electromagnetic blocks (508) control the position of the shaft lever (507) in the adjusting groove (506) so as to change the eccentricity.
  2. 2. The worm reduction gear according to claim 1, characterized in that the reduction ratio adjusting assembly (50) further comprises a link (509), one end of the link (509) is slidably connected to the shaft (507) and the other end is rotatably connected to the second transmission gear (504) through a rotation shaft (511), An overrunning clutch (512) is arranged between the second transmission gear (504) and the rotating shaft (511) and is used for unidirectionally transmitting power.
  3. 3. Worm reduction gear according to claim 1, characterized in that the electromagnetic blocks (508) are equally spaced circumferentially along the shaft (507) for providing a stable magnetic field force to maintain the set position of the shaft (507) in the adjustment groove (506).
  4. 4. Worm reduction gear according to claim 1, characterized in that the first (503) and the second (504) transmission gear are provided with groups, respectively, the eccentric (505) in each group differing from the initial phase angle of the first transmission gear (503) by 360 °/n, where n is the number of groups.
  5. 5. A worm reduction gear as claimed in claim 2, wherein the overrunning clutch (512) is arranged to transmit power to the second transfer gear (504) only when the link (509) is oscillated in the first direction and to effect idle rotation when oscillated in the second direction.
  6. 6. Worm reduction gear according to claim 1, characterized in that the adjustment groove (506) is a radially extending straight groove or an arc-shaped groove for guiding the shaft (507) to move radially for adjusting the eccentricity, the connecting rod (509) is provided with a through groove (510), and the end of the shaft (507) is located in the through groove (510) and can slide therein.
  7. 7. The worm reduction gear according to claim 1, characterized in that the housing assembly (10) comprises a first housing (101), a second housing (102) and a third housing (103) connected in sequence, the main worm assembly (20) and the secondary worm assembly (30) being mounted in the second housing (102).
  8. 8. The worm reduction gear according to claim 1, characterized in that the secondary worm assembly (30) comprises a second worm (302) and a second worm wheel (301), the second worm wheel (301) being mounted on the primary worm (202) for a two-stage worm drive.
  9. 9. The worm reduction gear according to claim 1, characterized in that the total gear ratio of the driving ring gear (501) and the driven ring gear (502) satisfies the following formula: wherein Z a represents the number of teeth of the driving gear ring, Z d represents the number of teeth of the driven gear ring, Z p1 represents the number of teeth of the first transmission gear, Z p2 represents the number of teeth of the second transmission gear ring, n a represents the rotating speed of the driving gear ring, n d represents the rotating speed of the driven gear ring, r represents the radius of the second transmission gear ring, k represents the transmission coefficient of the connecting rod, and e represents the eccentric distance between the shaft rod and the center of the eccentric wheel.
  10. 10. The worm reduction gear according to claim 1, characterized in that the center positions of the first transmission gear (503) and the second transmission gear (504) are fixed, and only rotatable about their own axes.

Description

Worm speed reduction transmission device Technical Field The invention relates to the transmission technology, in particular to a worm speed reduction transmission device. Background The worm speed reducer can realize larger transmission ratio due to single stage, and is applied to the scene requiring large reduction ratio and self-locking function. The prior art, for example, chinese patent application CN112388666a, proposes a robot shoulder joint device. In this patent, a worm gear pair is used to achieve lateral swinging of the robot arm, and the self-locking feature of the worm drive is used to lock the joint position when the power is off. The transmission ratio of the traditional worm pair is determined by the number of worm heads and the number of worm gears, and the reduction ratio is a fixed value after manufacturing is completed. The output rotational speed and torque cannot be dynamically adjusted according to actual load changes, speed requirements or process requirements. If the transmission characteristics are to be changed, the corresponding worm wheel or worm part must be stopped and replaced. In order to solve the problem of fixed speed ratio, the prior art generally adopts multi-motor switching at the driving source end or serial gear shifting mechanisms, stepless speed change devices and the like at the front end and the rear end. Although a certain range of speed regulation can be realized, the complexity of the transmission chain is increased, and the transmission chain is often difficult to implement in occasions with strict limited installation space. Disclosure of Invention In order to solve the defects in the prior art, the invention provides a worm speed reduction transmission device which adopts an electromagnetic eccentricity adjustment mode and realizes continuous adjustment of transmission ratio on the premise of not changing the number of worm heads or the number of worm gears. The technical scheme of the invention is realized as follows: a worm reduction transmission device comprises a shell component, a main worm component, an auxiliary worm component and a side-shaft component, wherein the main worm component and the auxiliary worm component are arranged in the shell component, The half-shaft component consists of an input half shaft and an output half shaft, the reduction ratio adjusting component comprises a driving gear ring and a driven gear ring, the driving gear ring is fixedly connected with the input half shaft, the driven gear ring is fixedly connected with the output half shaft, A plurality of first transmission gears are uniformly distributed along the inner periphery of the driving gear ring and meshed with the driving gear ring, a plurality of second transmission gears are uniformly distributed along the inner periphery of the driven gear ring and meshed with the driven gear ring, Wherein, the The eccentric wheel is arranged on the first transmission gear, the eccentric wheel is provided with an adjusting groove, the shaft rod is arranged in the adjusting groove in a sliding mode, electromagnetic blocks are arranged at two ends of the adjusting groove and on the shaft rod, and the electromagnetic blocks control the position of the shaft rod in the adjusting groove to change the eccentricity. In the invention, the speed reduction ratio adjusting component further comprises a connecting rod, one end of the connecting rod is connected with the shaft lever in a sliding way, the other end of the connecting rod is connected with the second transmission gear in a rotating way through a rotating shaft, And an overrunning clutch is arranged between the second transmission gear and the rotating shaft and is used for unidirectionally transmitting power. In the invention, the electromagnetic blocks are equidistantly arranged along the circumferential direction of the shaft rod and are used for providing stable magnetic field force to keep the shaft rod at a set position in the adjusting groove. In the invention, the first transmission gear and the second transmission gear are respectively provided with a plurality of groups, and the initial phase angle of the eccentric wheel in each group and the first transmission gear is different by 360 degrees/n, wherein n is the number of groups. In the invention, the overrunning clutch is arranged to transmit power to the second transmission gear only when the connecting rod swings in the first direction, and to realize idling when swinging in the second direction. In the invention, the adjusting groove is a radial extending straight line groove or an arc groove and is used for guiding the shaft rod to move along the radial direction to adjust the eccentricity, the connecting rod is provided with a through groove, and the end part of the shaft rod is positioned in the through groove and can slide in the through groove. In the invention, the shell component comprises a first shell, a second shell and a third shell which are sequential