Rotary speed reducer capable of adjusting frictional damping through external screws

Abstract

The rotary speed reducer comprises a shell, the shell comprises a seat ring and a shaft shell, a slewing bearing is arranged in the seat ring, the slewing bearing comprises a bearing inner ring and a bearing outer gear ring, a rolling body is arranged between the bearing inner ring and the bearing outer gear ring, and the rolling body is connected with the bearing inner ring and the bearing outer gear ring. A worm is arranged in the shaft shell, the bearing outer gear ring is matched with the worm, an installation step is arranged at the bottom of the seat ring, a friction plate bevel edge lifting plate is arranged on the installation step, and a shell friction plate is arranged between the friction plate bevel edge lifting plate and the bearing outer gear ring. According to the rotary speed reducer with the friction damping adjusted through the external screws, the problem that in the prior art, friction force of a friction gasket and a slewing bearing gear of a rotary speed reducer cannot be adjusted and controlled during assembly can be solved.

Description

Technical Field

[0001] The present invention relates to a rotary reducer with external screw adjustment of friction damping, belonging to the technical field of rotary reducers. Background Art

[0002] With the increasing application of drive rotary components and construction machinery, the technical solutions of using rotary speed reduction drives for the drive rotary parts are also increasing. The market's requirements for rotary speed reducers for drives are becoming more and more diverse, demanding higher load resistance, structural reliability, and more stable operation of the speed reducers.

[0003] Existing rotary reducers for construction machinery include a housing, a slewing bearing gear, a worm, a driving device, and a friction gasket. The friction gasket is fixedly combined with the housing, and the outer ring of the slewing bearing gear is in contact and cooperation with the friction gasket. When operating, the worm rotates to drive the slewing bearing gear, and the outer ring of the slewing bearing gear and the friction gasket make relative rotational movements. The friction plates generate frictional resistance to give a certain damping torque to the slewing bearing, making the device operate smoothly. However, it has the following disadvantages: 1. For the existing rotary reducer for construction machinery, the sizes of its friction gasket, housing, and slewing bearing gear are fixed during assembly, and the frictional torque cannot be adjusted during the assembly of components; 2. For the existing rotary reducer for construction machinery, after being used for a period of time, after the friction between the friction gasket and the slewing bearing gear, the friction plates become thinner or the surface roughness of the contact surface decreases, resulting in a smaller frictional force generated between the friction plates and the slewing bearing. At this time, the frictional torque cannot be adjusted, affecting the performance of the device. Summary of the Invention

[0004] The technical problem to be solved by the present invention is to provide a rotary reducer with external screw adjustment of friction damping for the above-mentioned existing technology, which can solve the problem that the frictional force between the friction gasket and the slewing bearing gear of the rotary reducer in the existing technology cannot be adjusted during assembly.

[0005] Another technical problem to be solved by the present invention is to provide a rotary reducer with external screw adjustment of friction damping for the above-mentioned existing technology, which can solve the problem that the frictional force between the friction gasket and the slewing bearing gear of the rotary reducer in the existing technology cannot be adjusted after on-site use, affecting the performance of the device.

[0006] The technical solution adopted by the present invention to solve the above problems is as follows: A rotary reducer with external screw adjustment of friction damping, which includes a housing. The housing includes a seat ring and a shaft housing. A slewing bearing is arranged inside the seat ring. The slewing bearing includes a bearing inner ring and a bearing outer gear ring. Rolling elements are arranged between the bearing inner ring and the bearing outer gear ring. A worm is arranged inside the shaft housing. The bearing outer gear ring is matched with the worm. An installation step is arranged at the bottom of the seat ring. A friction plate bevel lifting plate is arranged on the installation step. A housing friction plate is arranged between the friction plate bevel lifting plate and the bearing outer gear ring.

[0007] The housing friction plate is arranged on the installation step.

[0008] A plurality of cone head screws are arranged on the outer peripheral wall of the seat ring. The inner end of the cone head screw abuts against the friction plate bevel lifting plate.

[0009] The cone head screw and the friction plate bevel lifting plate are matched through an inclined plane.

[0010] A gear ring friction plate is arranged on the bearing outer gear ring.

[0011] The gear ring friction plate is connected to the bearing outer gear ring through a fixing screw.

[0012] The gear ring friction plate and the bearing outer gear ring are of an integral structure.

[0013] A locking nut is arranged on the cone head screw.

[0014] A driving motor is arranged on one side of the shaft housing. The worm is driven by the driving motor.

[0015] Compared with the prior art, the advantages of the present invention are as follows: 1. Through the contact and lifting action of the front cone surface of the cone head screw and the outer bevel of the housing friction plate bevel lifting plate, the present invention controls the friction force between the housing friction plate and the gear friction plate, thus solving the problem that the friction force between the friction gasket of the rotary reducer and the slewing bearing gear cannot be adjusted during production and assembly, making production control easier and saving costs; 2. Through the contact and lifting action of the front cone surface of the cone head screw and the outer bevel of the housing friction plate bevel lifting plate, the present invention controls the friction force between the housing friction plate and the gear friction plate. After the cone head screw used for external adjustment on the housing is installed and used by the customer, it is easier to adjust on-site according to the use working conditions, avoiding the problem of affecting the use after disassembly and replacement, being convenient and fast, and saving costs. Description of the Drawings

[0016] Figure 1 It is a three-dimensional structural schematic diagram of a rotary reducer with external screw adjustment of friction damping according to the present invention.

[0017] Figure 2 is Figure 1 the main sectional view of

[0018] Figure 3 is Figure 2 the A-A sectional view of

[0019] Figure 4 is Figure 3 the enlarged view of part B of

[0020] Wherein: housing 1 seat ring 1.1 shaft housing 1.2 slewing bearing 2 inner support ring 2.1 outer support gear ring 2.2 rolling element 2.3 worm 3 mounting step 4 friction plate bevel lifting plate 5 housing friction plate 6 cone head screw 7 gear ring friction plate 8 fixing screw 9 lock nut 10 drive motor 11. Specific embodiments

[0021] The present invention will be further described in detail below in conjunction with the embodiments of the accompanying drawings.

[0022] As Figures 1 to 4 shown, a rotary reducer with externally screwed adjustment of friction damping in this embodiment includes a housing 1, the housing 1 includes a seat ring 1.1 and a shaft housing 1.2, a slewing bearing 2 is arranged inside the seat ring 1.1, the slewing bearing 2 includes an inner support ring 2.1 and an outer support gear ring 2.2, rolling elements 2.3 are arranged between the inner support ring 2.1 and the outer support gear ring 2.2, a worm 3 is arranged inside the shaft housing 1.2, the outer support gear ring 2.2 is matched with the worm 3, a mounting step 4 is arranged at the bottom of the seat ring 1.1, a friction plate bevel lifting plate 5 is arranged on the mounting step 4, and a housing friction plate 6 is arranged between the friction plate bevel lifting plate 5 and the outer support gear ring 2.2; The housing friction plate 6 is arranged on the mounting step 4; A plurality of cone head screws 7 are arranged on the outer peripheral wall of the seat ring 1.1, and the inner ends of the cone head screws 7 abut against the friction plate bevel lifting plate 5; The cone head screw 7 is matched with the friction plate bevel lifting plate 5 through an inclined surface; A gear ring friction plate 8 is arranged on the outer support gear ring 2.2; The ring gear friction plate 8 is connected to the supporting outer ring gear 2.2 by fixing screws 9; Or the ring gear friction plate 8 and the supporting outer ring gear 2.2 are of an integral structure; A locking nut 10 is provided on the tapered head screw 7; A driving motor 11 is provided on one side of the shaft housing 1.2, and the worm 3 is driven by the driving motor 11.

[0023] Working principle: The housing fixes the friction plate bevel lifting plate and the housing friction plate through the mounting step to prevent them from rotating, and the friction plate bevel lifting plate 9 and the housing friction plate 8 are not axially fixed and can move axially; The ring gear friction plate is fixed to the supporting outer ring gear by fixing screws. By turning the tapered head screw, the front tapered surface of the tapered head screw contacts the outer bevel of the friction plate bevel lifting plate. As the tapered head screw moves towards the outer bevel of the friction plate bevel lifting plate, under the action of the inclined plane force, the friction plate bevel lifting plate moves upward towards the supporting outer ring gear. The friction plate bevel lifting plate drives the housing friction plate to move towards the supporting outer ring gear. The housing friction plate contacts the ring gear friction plate, and the acting pressure on the contact surface between the housing friction plate and the ring gear friction plate continuously increases, so the relative movement friction force between the housing friction plate and the ring gear friction plate increases; When the movement friction force is adjusted to the appropriate size, lock the locking nut to fix it.

[0024] The driving motor drives the worm to rotate. The worm meshes with the supporting outer ring gear to realize the operation of the supporting outer ring gear. The operation of the supporting outer ring gear drives the ring gear friction plate to rotate, so the relative movement friction force between the housing friction plate and the ring gear friction plate plays a friction damping role.

[0025] In addition to the above embodiments, the present invention also includes other implementation manners. All technical solutions formed by equivalent transformation or equivalent substitution shall fall within the protection scope of the claims of the present invention.

Claims

1. A rotary reducer with external screw adjustment of friction damping, characterized in that: It includes a housing (1), the housing (1) includes a seat ring (1.1) and a shaft housing (1.2), a slewing bearing (2) is arranged in the seat ring (1.1), the slewing bearing (2) includes a bearing inner ring (2.1) and a bearing outer gear ring (2.2), rolling elements (2.3) are arranged between the bearing inner ring (2.1) and the bearing outer gear ring (2.2), a worm (3) is arranged in the shaft housing (1.2), the bearing outer gear ring (2.2) is matched with the worm (3), an installation step (4) is arranged at the bottom of the seat ring (1.1), a friction plate bevel lifting plate (5) is arranged on the installation step (4), and a housing friction plate (6) is arranged between the friction plate bevel lifting plate (5) and the bearing outer gear ring (2.2).

2. The rotary reducer with externally screwed adjustment of frictional damping according to claim 1, wherein: The housing friction plate (6) is arranged on the installation step (4).

3. The rotary reducer with externally screwed adjustment of friction damping according to claim 1, characterized in that: A plurality of cone head screws (7) are arranged on the outer peripheral wall of the seat ring (1.1), and the inner ends of the cone head screws (7) abut against the friction plate bevel lifting plate (5).

4. The swing reducer with externally screwed adjustment of friction damping according to claim 4, characterized in that: The cone head screws (7) are matched with the friction plate bevel lifting plate (5) through an inclined surface.

5. The rotary reducer for externally adjusting friction damping by a screw according to claim 1, wherein: A gear ring friction plate (8) is arranged on the bearing outer gear ring (2.2).

6. The rotary reducer for externally adjusting friction damping by screws according to claim 5, characterized in that: The gear ring friction plate (8) is connected with the bearing outer gear ring (2.2) through a fixing screw (9).

7. A rotary reducer with externally screwed adjustment of friction damping according to claim 5, characterized in that: The gear ring friction plate (8) and the bearing outer gear ring (2.2) are of an integral structure.

8. A rotary reducer with externally screwed adjustment of frictional damping according to claim 3, characterized in that: A locking nut (10) is arranged on the cone head screw (7).

9. A rotary reducer with external screw-adjusted friction damping according to claim 1, characterized in that: A driving motor (11) is arranged on one side of the shaft housing (1.2), and the worm (3) is driven by the driving motor (11).

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