Backlash-eliminating rotary lifting device without solid rotating shaft

Abstract

A backlash-eliminating rotary lifting device without a solid rotating shaft belongs to a transmission device and is characterized in that a base is provided with an arc-shaped slope surface, a swing rod, a torsion spring and a motor gear box are fixed at the rear part of the motor gear box through a swing rod rotating shaft, the motor gear box is arranged in the base, and gear box output gears connected with two sides of the motor gear box are meshed with an inner gear; the motor gear box is driven to move up and down along the arc-shaped slope of the base, and the rotary lifting load is installed on the rear portion of the motor gear box. The motor gear box has the advantages that the V-shaped groove bearing fixes the motor gear box on the arc-shaped slope surface of the base through the pressure of the torsion spring, so that the motor gear box can only move along the arc-shaped slope surface of the base, solid-rotating-shaft-free rotating motion is achieved, a gear box output gear is affected by the pressure of the torsion spring to be tightly meshed with an inner gear, and the effect of eliminating backlash is achieved; and the operation stability of the whole device is improved, and the rotary lifting load is not prone to shaking.

Description

Technical Field

[0001] The invention belongs to the field of mechanical transmission, and in particular relates to a non-substantial rotating shaft backlash-eliminating rotating lifting device. Background Art

[0002] In recent years, with the improvement of living standards, people have higher requirements for product and usability, as well as appearance. In order to improve the appearance and use of products, many products are designed to adjust the height of functional components by controlling the transmission mechanism, or hide the product under the platform when not in use. To this end, the rotary lifting device currently provided by various manufacturers to achieve the above functions is realized in the form of a rotating part rotating around a solid axis, and the rotating transmission mechanism is realized by a motor or a gearbox plus a motor. This rotary lifting device has the following defects: 1. The rotating part rotates around the solid axis, and the solid axis will occupy a part of the space, which has certain restrictions on the appearance design. 2. When using a reducer, the tooth gap of the reducer will cause the functional components of the rotary lifting to vibrate when the external environment vibrates, affecting the user experience. Summary of the invention

[0003] The object of the present invention is to overcome the above-mentioned defects and provide a non-substantial shaft backlash-eliminating rotary lifting device, which realizes the rotation of the non-substantial shaft and avoids the load from shaking due to external vibration and transmission gap.

[0004] The object of the present invention is achieved through the following technical solutions: a non-substantial rotating shaft anti-gear backlash rotating lifting device, characterized in that it includes a base, an internal gear, a motor gear box, a swing rod and a torsion spring, arc-shaped slopes are provided on both sides of the front of the base, mounting grooves are provided on the arc-shaped slopes, and internal gears matching the arc-shaped slopes are installed on both sides of the mounting grooves, two hanging ears are symmetrically provided at the rear of the motor gear box, and hanging ear shaft holes and hanging ear plug holes are provided on the two hanging ears, respectively, and the swing rod is provided with a swing rod shaft hole and a swing rod plug hole, respectively, and the two ends of the swing rod rotating shaft are inserted in the hanging ear shaft hole and the swing rod shaft hole, respectively, and a torsion spring is set on the swing rod rotating shaft, the inner support arm of the torsion spring is inserted in the hanging ear plug hole, and the outer support arm of the torsion spring is inserted in the swing rod plug hole, the motor gear box is installed in the base, and the arc-shaped surfaces on both sides of the rear of the motor gear box are installed in the mounting grooves, the output shafts on both sides of the motor gear box are connected to the gear box output gear, and the gear box output gear is meshed with the internal gear, and the rear of the motor gear box is installed with a rotating lifting load.

[0005] A V-shaped protrusion along the arc-shaped slope is provided at the rear of the base, a threaded hole is provided on the swing arm, a stepped shaft screw is inserted into the threaded hole, a V-groove bearing is mounted on the stepped shaft screw, and the V-groove of the V-groove bearing fits with the V-shaped protrusions on both sides of the base.

[0006] The rear portion of the motor gearbox is provided with a locating pin and a threaded hole for mounting a rotating lifting load.

[0007] The beneficial effects of the present invention are:

[0008] 1. The output shaft of the motor gearbox rotates and transmits torque to the output gear of the gearbox. The output gear of the gearbox meshes with the internal gear and moves up and down along the arc slope of the base. The output gear of the gearbox is tightly meshed with the internal gear under the pressure of the torsion spring, which plays a role in eliminating tooth clearance, improving the stability of the operation of the entire non-solid shaft rotary lifting device, and making the load that needs to be rotated and lifted not easy to shake in complex environments such as external vibration.

[0009] 2. The V-groove bearing on the rocker arm cooperates with the V-shaped protrusion on the base through the pressure of the torsion spring to fix the motor gear box to the arc-shaped slope of the base, so that the motor gear box can only move along the arc-shaped slope of the base, thereby realizing the rotational movement of the non-solid shaft. At the same time, the motor gear box is pressed against the arc-shaped slope of the base, so that the load that needs to be rotated and lifted is not prone to jitter in complex environments such as external vibration. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] Figure 1 It is a schematic diagram of the structure of the present invention.

[0011] Figure 2 It is a schematic diagram of the rear structure of the motor gearbox of the present invention.

[0012] Figure 3 It is a side structural schematic diagram of the present invention.

[0013] Figure 4 It is a schematic diagram of the top structure of the present invention.

[0014] in:

[0015] 1-base, 2-rocker shaft, 3-mounting slot, 4-motor gearbox, 5-internal gear, 6-gearbox output gear, 7-rocker, 8-hanging ear, 9-hanging ear shaft hole, 10-hanging ear socket, 11-V-shaped protrusion, 12-rocker socket, 13-torsion spring, 14-V-groove bearing, 15-step shaft screw, 16-rocker shaft hole, 17-locating pin, 18-threaded hole. DETAILED DESCRIPTION

[0016] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0017] Embodiment: In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the present invention is further described in detail below with reference to the accompanying drawings and specific embodiments.

[0018] As shown in the figure, a non-substantial shaft anti-gear backlash rotary lifting device includes a base 1, an internal gear 5, a motor gear box 4, a gear box output gear 6, a V-groove bearing 14, a torsion spring 13, a swing rod 7 and a swing rod shaft 2. The front two sides of the base 1 are provided with arc-shaped slopes, the arc-shaped slopes are provided with mounting grooves 3, and the two sides of the mounting grooves 3 are provided with internal gears 5 that match the arc-shaped slopes. The rear of the motor gear box 4 is symmetrically provided with two hanging ears 8, and each hanging ear 8 is provided with upper and lower hanging ears respectively. The swing rod 7 is provided with a swing rod shaft hole 16 and a swing rod plug hole 12 respectively. One end of the swing rod shaft 2 is inserted in the hanging ear shaft hole 9 and fixed with the motor gear box 4. The other end of the swing rod shaft 2 is inserted in the swing rod shaft hole 16. A torsion spring 13 is mounted on the swing rod shaft 2. The inner arm of the torsion spring 13 is inserted in the hanging ear plug hole 10. The outer arm of the torsion spring 13 is inserted in the swing rod plug hole 12. The V-groove bearing 14 is mounted on the step shaft screw 15. The end thread of the stepped shaft screw 15 is connected with the threaded hole on the swing rod 7 to fix the V-groove bearing 14 to the swing rod 7. The hanging ear 8 of the motor gear box 4 is equipped with 4 sets of swing rod rotating shafts 2, swing rods 7, torsion springs 13 and V-groove bearings 14 symmetrically arranged on the upper, lower, left and right sides; the rear part of the arcuate slope on both sides of the base 1 is provided with a V-shaped protrusion 11 along the arcuate slope, the motor gear box 4 is installed in the base 1, and the arcuate surfaces on both sides of the rear part of the motor gear box 4 are installed on the mounting plate that matches the arcuate surface thereof. The motor gear box 4 is installed in the groove 3, and output shafts extending out of the gear box are provided on both sides of the motor gear box 4. Two gear box output gears 6 are respectively fixed to the output shafts on both sides of the motor gear box 4. The gear box output gear 6 is meshed with the internal gear 5, and moves the motor gear box 4 up and down along the arc slope of the base 1. The V-groove of the V-groove bearing 14 is installed in the V-shaped protrusions 11 on both sides of the gear box 4. The rear part of the motor gear box 4 is provided with a locating pin 17 and a threaded hole 18 for installing a rotating lifting load.

[0019] Working principle:

[0020] The output shaft of the motor gearbox rotates, transmitting torque to the gearbox output gear 6 , which meshes with the internal gear 5 , and the motor gearbox moves up and down along the arc-shaped slope of the base 1 .

[0021] The V-groove bearing 14 on the rocker arm 7 cooperates with the V-shaped protrusion 11 on the base 1 through the pressure of the torsion spring 13 to fix the motor gear box 4 to the arc-shaped slope of the base 1, so that the motor gear box 4 can only move along the arc-shaped slope of the base 1, thereby realizing the rotational movement without a solid shaft. At the same time, the motor gear box 4 is pressed against the arc-shaped slope of the base 1, so that the load that needs to be rotated and lifted is not prone to shaking even in complex environments such as external vibrations.

[0022] The output gear 6 of the gear box is tightly meshed with the internal gear 5 under the pressure of the torsion spring 13, which plays a role in eliminating tooth clearance, improving the stability of the operation of the entire non-solid shaft rotary lifting device, and also making the load that needs to be rotated and lifted not prone to shaking in complex environments such as external vibrations.

[0023] The above is an exemplary description of the present invention. It should be noted that, without departing from the core of the present invention, any simple deformation, modification or other equivalent replacement that can be made by other technicians in this field without expending creative labor falls within the scope of protection of the patent.

Claims

1. A non-substantial shaft backlash-eliminating rotary lifting device, characterized in that: It includes a base, an internal gear, a motor gear box, a rocker arm and a torsion spring, wherein arc-shaped slopes are provided on both sides of the front part of the base, and mounting grooves are provided on the arc-shaped slopes, and internal gears matching the arc-shaped slopes are installed on both sides of the mounting grooves, and two hanging ears are symmetrically provided on the rear part of the motor gear box, and the two hanging ears are respectively provided with hanging ear shaft holes and hanging ear plug holes, and the rocker arm is respectively provided with a rocker arm shaft hole and a rocker arm plug hole, and the two ends of the rocker arm rotating shaft are respectively inserted in the hanging ear shaft hole and the rocker arm shaft hole, and a torsion spring is set on the rocker arm rotating shaft, the inner support arm of the torsion spring is inserted in the hanging ear plug hole, and the outer support arm of the torsion spring is inserted in the rocker arm plug hole, and the motor gear box is installed in the base, and the arc-shaped surfaces on both sides of the rear part of the motor gear box are installed in the mounting grooves, and the output shafts on both sides of the motor gear box are connected to the gear box output gear, and the gear box output gear is meshed with the internal gear, and a rotating lifting load is installed at the rear part of the motor gear box.

2. According to claim 1, the non-substantial shaft backlash-eliminating rotary lifting device is characterized in that: A V-shaped protrusion along the arc-shaped slope is provided at the rear of the base, a threaded hole is provided on the swing arm, a stepped shaft screw is inserted into the threaded hole, a V-groove bearing is mounted on the stepped shaft screw, and the V-groove of the V-groove bearing fits with the V-shaped protrusions on both sides of the base.

3. According to claim 1, the non-substantial shaft backlash-eliminating rotary lifting device is characterized in that: The rear portion of the motor gearbox is provided with a locating pin and a threaded hole for mounting a rotating lifting load.

Images