A flexspline with embedded airbag and harmonic reducer

Abstract

The utility model provides a kind of inner-embedded air bag's flexible wheel and harmonic reducer, it is related to harmonic reducer technical field, inner-embedded air bag's flexible wheel includes flexible wheel body and air bag;The flexible wheel body is equipped with cavity and the inner hole for installing wave generator, outer wall is equipped with the outer tooth surface for engaging with rigid wheel;The air bag is embedded in the cavity, and it is in contact with the inner wall of the flexible wheel body in inflation state;When the internal gas of the air bag is extracted to negative pressure, the flexible wheel body is evenly shrunk under internal and external air pressure difference, the outer tooth surface is disengaged with the engagement of rigid wheel, the cooperation mode of inner wall and wave generator is converted from interference fit to clearance fit, so that rigid wheel, flexible wheel and wave generator can be separated more easily and quickly, to complete the disassembly of harmonic reducer more easily and quickly, the three parts described above will not appear plastic deformation due to uneven stress and lead to disassembly failure, improve reliability.

Description

Technical Field

[0001] This utility model relates to the field of harmonic reducer technology, and in particular to a flexible wheel with an embedded airbag and a harmonic reducer. Background Technology

[0002] A harmonic gear reducer consists of a fixed rigid gear, a flexible gear, and a wave generator that causes radial deformation of the flexible gear. It utilizes the controllable elastic deformation wave generated by the flexible gear to induce relative tooth misalignment between the rigid and flexible gears, thereby transmitting power and motion. Typically, the wave generator is the driving element, one of the flexible and rigid gears is the driven element, and the other is a fixed component. The flexible gear and wave generator are installed with an interference fit, while the flexible gear and rigid gear are installed with an transition fit.

[0003] In the existing technology, the assembly and disassembly of harmonic gear reducers require the use of specific tools and take a long time to complete the disassembly of the above three parts. Moreover, due to uneven force during disassembly, the above three parts are prone to plastic deformation, resulting in disassembly failure. Utility Model Content

[0004] In view of this, the present invention proposes a flexible wheel with an embedded airbag and a harmonic reducer to solve the technical problems mentioned in the background art, which require a long time to complete the disassembly of the rigid wheel, flexible wheel and wave generator, and the three parts are prone to plastic deformation due to uneven force during disassembly, resulting in disassembly failure.

[0005] The technical solution of this utility model is implemented as follows: In a first aspect, this utility model provides a flexible wheel with an embedded airbag, comprising a flexible wheel body and an airbag, wherein: The flexible wheel body is provided with a cavity and an inner hole for installing a wave generator, and the outer wall is provided with an outer tooth surface for meshing with the rigid wheel. The airbag is embedded in the cavity and, when inflated, abuts against the inner wall of the flexible wheel body; When the internal gas of the airbag is drawn out to a negative pressure, the flexible wheel body contracts uniformly under the pressure difference between the inside and outside, the outer tooth surface disengages from the rigid wheel, and the fit between the inner wall and the wave generator changes from an interference fit to a clearance fit.

[0006] Based on the above technical solutions, preferably, the outer wall of the airbag is attached to the outer wall of the flexible wheel body after inflation.

[0007] Based on the above technical solutions, preferably, the inner wall diameter of the inflated airbag is larger than the inner hole diameter of the flexible wheel body.

[0008] Based on the above technical solutions, preferably, the flexible wheel body is made of a material that is prone to elastic deformation.

[0009] Based on the above technical solutions, preferably, it also includes an air nozzle, which is installed on the airbag and passes through the end face of the flexible wheel body. The air nozzle is used to connect an air pump to extract gas from the airbag or inflate the airbag to normal pressure.

[0010] Based on the above technical solutions, preferably, a cover plate is also included, which is connected to the end face of the flexible wheel body.

[0011] Based on the above technical solutions, preferably, the wall thickness of the flexible wheel body is 0.5mm~3mm.

[0012] Secondly, this utility model provides a harmonic reducer, including a wave generator and a rigid wheel, as well as a flexible wheel with an embedded airbag as described in the first aspect, wherein the wave generator is fitted into the inner hole of the flexible wheel body, and the rigid wheel meshes with the outer tooth surface of the flexible wheel.

[0013] The flexible wheel with an embedded airbag in this invention has the following advantages over the prior art: (1) The airbag is embedded in the cavity and in the inflated state, it abuts against the inner wall of the flexible wheel body. When the gas inside the airbag is drawn out to a negative pressure, the flexible wheel body contracts evenly under the pressure difference between the inside and outside. The outer tooth surface disengages from the rigid wheel, and the fit between the inner wall and the wave generator changes from an interference fit to a clearance fit. This makes it easier and faster to separate the rigid wheel, the flexible wheel and the wave generator, so as to more easily and quickly complete the disassembly of the harmonic reducer. The disassembly will not fail due to plastic deformation of the above three parts caused by uneven force, thus improving reliability. (2) By inflating the airbag and having its outer wall attached to the outer wall of the flexible wheel body, the outer tooth surface can mesh well with the rigid wheel under deformation, thereby improving stability and reliability. (3) The inner wall diameter of the airbag after inflation is larger than the inner hole diameter of the flexible wheel body, which facilitates the installation of the wave generator. After the airbag is deflated, it will not move out of the cavity of the flexible wheel body. After the next inflation, it can continue to fill the space between the inner and outer walls of the flexible wheel body, thus improving the reliability of the device. (4) By using a material that is prone to elastic deformation, the gas in the airbag is drawn into negative pressure, so that the flexible wheel body contracts evenly under the pressure difference between the inside and outside. The outer tooth surface is more likely to disengage from the rigid wheel, and the inner wall and the wave generator are more likely to be converted into a clearance fit. Attached Figure Description

[0014] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0015] Figure 1 This is a schematic diagram of the flexible wheel of the embedded airbag in an embodiment of the present invention; Figure 2 This is a schematic diagram of the flexible wheel of the embedded airbag in this embodiment of the present invention after the cover plate is removed.

[0016] Explanation of reference numerals in the attached diagram: 1-Flexible wheel body, 2-Airbag, 3-Air nozzle, 4-Cover plate; 11-Cavity, 12-External tooth surface, 13-Internal hole. Detailed Implementation

[0017] The technical solutions of this utility model will be clearly and completely described below with reference to the embodiments of this utility model. Obviously, the described embodiments are only a part of the embodiments of this utility model, and not all of them. Based on the embodiments of this utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of this utility model.

[0018] Reference Figure 1 and Figure 2 As shown, in a first aspect embodiment of the present invention, a flexible wheel with an embedded airbag is provided, comprising a flexible wheel body 1 and an airbag 2, wherein: The flexible wheel body 1 has a cavity 11 and an inner hole 13 for mounting a wave generator, and the outer wall has an outer tooth surface 12 for meshing with a rigid wheel; the flexible wheel body 1 has an inner hole 13 in the middle, forming a ring structure, and the cavity 11 is annular. The airbag 2 is embedded in the cavity 11 and, when inflated, abuts against the inner wall of the flexible wheel body 1; When the internal gas of the airbag 2 is extracted to a negative pressure, the flexible wheel body 1 contracts uniformly under the pressure difference between the inside and outside, the outer tooth surface 12 disengages from the rigid wheel, and the fit between the inner wall and the wave generator changes from an interference fit to a clearance fit.

[0019] The flexible wheel with an embedded airbag proposed in this embodiment is embedded in the cavity 11 by the airbag 2, which abuts against the inner wall of the flexible wheel body 1 when inflated. When the gas inside the airbag 2 is extracted to a negative pressure, the flexible wheel body 1 contracts uniformly under the pressure difference between the inside and outside. The outer tooth surface 12 disengages from the rigid wheel, and the fit between the inner wall and the wave generator changes from an interference fit to a clearance fit. This allows for easier and faster separation of the rigid wheel, flexible wheel, and wave generator, enabling easier and faster disassembly of the harmonic reducer. Disassembly failure is not caused by plastic deformation of the three parts due to uneven force, thus improving reliability.

[0020] In some embodiments, the outer wall of the inflated airbag 2 adheres to the outer wall of the flexible wheel body 1. By having the outer wall of the inflated airbag 2 adhere to the outer wall of the flexible wheel body 1, the outer tooth surface 12 can better mesh with the rigid wheel under deformation, thereby improving stability and reliability.

[0021] In some embodiments, the inner wall diameter of the inflated airbag 2 is larger than the inner hole diameter 13 of the flexible wheel body 1. This arrangement facilitates the installation of the wave generator and ensures that the airbag 2 does not move out of the cavity 11 of the flexible wheel body 1 after deflating. It can continue to fill the space between the inner and outer walls of the flexible wheel body 1 after the next inflation, thus improving the reliability of the device.

[0022] In some embodiments, the flexible wheel body 1 is made of a material that is prone to elastic deformation. By using a material that is prone to elastic deformation for the flexible wheel body 1, the gas inside the airbag 2 is drawn into a negative pressure, causing the flexible wheel body 1 to contract uniformly under the pressure difference between the inside and outside of the airbag. This makes it easier for the outer tooth surface 12 to disengage from the rigid wheel, and the fit between the inner wall and the wave generator is more easily converted into a clearance fit.

[0023] In some embodiments, the flexible wheel further includes an air nozzle 3, which is mounted on the air bladder 2 and passes through the end face of the flexible wheel body 1. The air nozzle 3 is used to connect an air pump to extract gas from the air bladder 2 or inflate the air bladder 2 to atmospheric pressure. The air nozzle 3 can be a concealed design, flush with the end face of the flexible wheel body 1, thereby avoiding interference between the air nozzle 3 and other parts and improving the reliability and stability of the device. The air nozzle 3 is provided with a sealing cap, which is used to seal the device after inflation.

[0024] In some embodiments, the flexible wheel further includes a cover plate 4, which is connected to the end face of the flexible wheel body 1. The cover plate 4 and the flexible wheel body 1 are detachably connected, thereby facilitating the placement of the airbag 2 into the cavity 11.

[0025] In some embodiments, the wall thickness of the flexible wheel body 1 is 0.5mm to 3mm. By setting the above parameters, the wall thickness of the flexible wheel is relatively thin, and the flexible wheel body 1 can contract uniformly under the pressure difference between the inside and outside.

[0026] The working principle of the flexible wheel with embedded airbag in this embodiment of the utility model is as follows: Open the air nozzle 3 on the airbag 2, connect the air nozzle 3 with an air pump, turn on the air pump to draw air out until the airbag 2 is under negative pressure; the flexible wheel body 1 contracts evenly under the pressure difference between the inside and outside, the outer tooth surface 12 disengages from the rigid wheel, and the inner surface changes from interference fit to clearance fit with the wave generator, so that the rigid wheel, flexible wheel and wave generator can be separated more easily and quickly, so that the disassembly and inspection of the harmonic reducer can be completed more easily and quickly.

[0027] Based on the same concept, a second aspect of this utility model proposes a harmonic reducer, including a wave generator and a rigid wheel, as well as a flexible wheel with an embedded airbag as described in the first aspect embodiment. The wave generator is fitted into the inner hole 13 of the flexible wheel body 1, and the rigid wheel meshes with the outer tooth surface 12 of the flexible wheel.

[0028] The harmonic reducer proposed in this embodiment can easily and quickly separate the rigid wheel, flexible wheel, and wave generator to complete the disassembly of the harmonic reducer. Disassembly will not fail due to plastic deformation of the above three parts caused by uneven force, thus improving reliability.

[0029] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A flexible wheel with an embedded airbag, characterized in that, Includes the flexible wheel body and the airbag, wherein: The flexible wheel body is provided with a cavity and an inner hole for installing a wave generator, and the outer wall is provided with an outer tooth surface for meshing with the rigid wheel. The airbag is embedded in the cavity and, when inflated, abuts against the inner wall of the flexible wheel body; When the internal gas of the airbag is drawn out to a negative pressure, the flexible wheel body contracts uniformly under the pressure difference between the inside and outside, the outer tooth surface disengages from the rigid wheel, and the fit between the inner wall and the wave generator changes from an interference fit to a clearance fit.

2. The flexible wheel with an embedded airbag as described in claim 1, characterized in that, After the airbag is inflated, its outer wall fits against the outer wall of the flexible wheel body.

3. The flexible wheel with an embedded airbag as described in claim 2, characterized in that, The inner diameter of the inflated airbag is larger than the inner diameter of the flexible wheel body.

4. The flexible wheel with an embedded airbag as described in claim 1, characterized in that, The flexible wheel body is made of a material that is prone to elastic deformation.

5. The flexible wheel with an embedded airbag as described in claim 1, characterized in that, It also includes an air nozzle, which is mounted on the airbag and passes through the end face of the flexible wheel body. The air nozzle is used to connect an air pump to extract gas from the airbag or inflate the airbag to normal pressure.

6. The flexible wheel with an embedded airbag as described in claim 1, characterized in that, It also includes a cover plate, which is connected to the end face of the flexible wheel body.

7. The flexible wheel with an embedded airbag as described in claim 1, characterized in that, The wall thickness of the flexible wheel body is 0.5mm to 3mm.

8. A harmonic reducer, characterized in that, It includes a wave generator and a rigid wheel, as well as a flexible wheel with an embedded airbag as described in any one of claims 1-7, wherein the wave generator is fitted into the inner hole of the flexible wheel body, and the rigid wheel meshes with the outer tooth surface of the flexible wheel.

Images