JP2018135898A - Wave motion decelerator including self-lubrication device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a wave motion decelerator having a self-lubrication function.SOLUTION: A wave motion decelerator including a self-lubrication device, further includes a main body 1, a flexible outer gear b, a wave generator, and a self-lubrication device. The main body has an accommodation hole, the accommodation hole is provided with an annular inner gear, the flexible outer gear is disposed in the accommodation hole, an outer gear corresponding to the inner gear is disposed on the flexible outer gear, the inner gear and the outer gear are partially engaged, the flexible outer gear has a mounting hole B1, the wave generator is disposed in the mounting hole, the wave generator includes a cam A and a bearing 2, an inner ring 24 of the bearing is fitted on the cam, the outer ring 21 of the bearing is kept into contact with an inner peripheral face of the mounting hole, a plurality of rolling elements 23 are disposed between the inner ring and the outer ring, the self-lubrication device is disposed at one side of the bearing, the self-lubrication device includes a base seat 3, an oil-containing member 4, and a lubrication member 5, the oil-containing member is disposed on the base seat, and the oil-containing member includes the self-lubrication device kept into contact with the lubrication member.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a wave reducer, and more particularly to a wave reducer provided with a self-lubricating device.

  In the design process of the robot arm mechanism, the limit of the weight of the normal motor and the output demand of the preset torque are considered. Therefore, a low-power, low-torque, high-rotation output motor is selected, and the output torque is increased to the output demand by combining with a wave gear reducer having an appropriate reduction ratio. The wave gear mainly has a structure including a wave generator, a flexible external gear, and a rigid internal gear. The wave generator is constructed by fitting an elliptical cam into a thin-walled deep groove ball bearing. The flexible external gear is a thin cup-shaped elastic body and has an external gear on the surface of the opening. The number of teeth of the rigid internal gear is two more than the number of teeth of the external gear. In operation, the rigid internal gear is fixed, and the elliptical cam is rotated by high-speed shaft input. The thin-walled deep groove ball bearing is fixed to the cam, and the outer ring of the bearing is elastically deformed by the rotation of the elliptical cam. In conjunction with this, the flexible external gear is elastically deformed and partially meshed with the rigid internal gear. As a result, the flexible external gear starts to move relative to the rigid internal gear. At this time, since the difference in the number of teeth between the flexible external gear and the rigid internal gear is small, the flexible external gear outputs a considerable torque at a low rotation.

  In the wave gear, the outer ring of the bearing and the flexible external gear are elastically deformed during operation, so that a large number of teeth mesh with each other to achieve a speed reduction effect. During operation, the outer ring of the bearing and the beads in the bearing have high frictional heat due to the drive of the elliptical cam, and become very high especially when the input rotational speed is 3000 RPM or more. However, since the wave gear reducer is in a closed state after being attached to the facility, it is difficult to lubricate the above parts using an external lubricating device. For this reason, the wave gear is frequently damaged or malfunctioned due to insufficient lubrication. Due to such problems, the rotational speed of the input shaft is limited, and the conditions under which the wave gear can be applied are also limited.

  In view of the above problems, a main object of the present invention is to provide a wave reducer having a self-lubricating function.

  In order to solve the above problems, a wave reducer including a self-lubricating device according to the present invention includes a main body, a flexible external gear, a wave generator, and a self-lubricating device, and the main body is accommodated. An annular internal gear is provided in the accommodation hole, the flexible external gear is disposed in the accommodation hole, and an external gear corresponding to the internal gear is provided in the flexible external gear. The internal gear and the external gear partially mesh with each other, the flexible external gear has a mounting hole, the wave generator is disposed in the mounting hole, and the wave generator is a cam and A bearing, an inner ring of the bearing is fitted into the cam, an outer ring of the bearing is in contact with an inner peripheral surface of the mounting hole, and a plurality of rolling elements are provided between the inner ring and the outer ring. The self-lubricating device is provided on one side of the bearing, and the self-lubricating device includes a base and an oil retaining member. The oil-impregnated member is disposed on the base seat, and the oil-impregnated member is in contact with the rolling element.

  Preferably, the base seat is provided with a concave groove and a through hole, the concave groove communicates with the through hole, the oil retaining member is disposed in the concave groove, and the self-lubricating device further includes the through hole. The lubrication member has one end in contact with the oil-impregnated member and the other end in contact with the rolling element or the inner ring of the bearing.

  Preferably, the cam is provided with a plurality of fixing holes, the base seat is provided with a plurality of fixing columns corresponding to the plurality of fixing holes, and the fixing holes and the fixing columns are fitted to each other. Thus, the base is fixed to the side surface of the bearing.

  In addition, preferably, it further includes an outer lid that covers the outside of the self-lubricating device.

  According to the present invention, the lubricating device is arranged in an extra space of the wave reducer by the configuration related to the lubricating device, and the oil-containing member (lubricating member) and the rolling element come into contact with each other, so that the lubricating oil is transferred to the bearing and peripheral parts (possible The flexible external gear (main body) is supplied and these parts are sufficiently lubricated.

It is a disassembled perspective view (the 1) of the wave reducer provided with the self-lubricating device concerning the present invention. It is a disassembled perspective view (the 2) of the wave reducer provided with the self-lubricating device which concerns on this invention. It is an assembly drawing of the wave reducer provided with the self-lubricating device according to the present invention. It is sectional drawing (the 1) of the wave reducer provided with the self-lubricating apparatus which concerns on this invention. It is sectional drawing (the 2) of the wave reducer provided with the self-lubricating apparatus which concerns on this invention.

  Please refer to FIG. 1 to FIG. 1 to 5 show an example of a preferred embodiment. A wave reducer provided with a self-lubricating device according to the present invention includes a main body 1, a flexible external gear B, a wave generator, and a self-lubricating device. The main body 1 has an accommodation hole 11. An annular internal gear 111 is provided in the accommodation hole 11. The flexible external gear B is disposed in the accommodation hole 11. The flexible external gear B has an external gear B2 corresponding to the internal gear 111, and the internal gear 111 and the external gear B2 partially mesh with each other. The flexible external gear B has a mounting hole B1. The wave generator is disposed in the mounting hole B1. The wave generator includes a cam A and a bearing 2. The inner ring 24 of the bearing 2 is fitted into the cam A, and the outer ring 21 of the bearing 2 is in contact (contact) with the inner peripheral surface of the mounting hole B1. A plurality of rolling elements 23 are provided between the inner ring 24 and the outer ring 21. The self-lubricating device is provided on one side of the bearing 2. The cam A is provided with a plurality of fixing holes A1, the base 3 is provided with a fixing column 33 corresponding to the fixing hole A1, and the fixing hole A1 and the fixing column 33 are fitted to each other. 3 is fixed to the side surface of the bearing 2. The self-lubricating device includes a base 3 and an oil retaining member 4. The oil impregnated member 4 is installed on the base 3. The base 3 is provided with a recessed groove 31 and a through hole 32. The concave groove 31 communicates with the through hole 32. The oil impregnated member 4 is disposed in the concave groove 31. The self-lubricating device further includes a lubricating member 5. The lubricating member 5 is disposed in the through hole 32. The lubricating member 5 may have one end in contact with the oil retaining member 4, the other end in contact with the rolling element 23, and further in contact with the inner ring 24. A wool felt may be used for the lubricating member 5 of the present embodiment. For the oil-containing member 4, wool felt, oil or fat, or solid oil lump that absorbs oil may be used. When a wool felt is used for the oil-containing member 4, the lubricating member 5 may be formed integrally with the oil-containing member 4. When oil or fat or a solid oil lump is used for the oil-containing member 4, it is necessary that the lubricating member 5 be formed separately and absorb the oil or oil of the solid oil lump and apply it to the rolling elements 23. The outer lid 6 is provided outside the self-lubricating device.

  As described above, there is no doubt that the present invention has “industrial applicability”. In addition, the technical features disclosed in the present embodiment were not published in publications prior to filing, nor were they used publicly, and not only had the fact that the effects were enhanced, but also had additional effects. I can't miss it. Therefore, the “novelty” and “inventive step” of the present invention satisfy the provisions of the patent laws and regulations, and since the patent application is filed according to the law, it is expected that the patent will be assessed early through examination.

  The disclosure by the above embodiment is for explaining the present invention, and does not limit the present invention. Therefore, any change in numerical value, replacement of equivalent elements, etc. are all included in the scope of the present invention.

DESCRIPTION OF SYMBOLS 1 Main body 11 Accommodating hole 111 Internal gear 2 Bearing 21 Outer ring 23 Rolling element 24 Inner ring A Cam A1 Fixing hole B Flexible external gear B1 Mounting hole B2 External gear 3 Base seat 31 Groove 32 Through hole 33 Fixed column 4 Oil containing member 5 Lubricating member 6 Outer lid

Claims (4)

A wave reducer with a self-lubricating device,
A main body, a flexible external gear, a wave generator, and a self-lubricating device,
The main body has a receiving hole, and the receiving hole is provided with an annular internal gear,
The flexible external gear is disposed in the accommodation hole, the flexible external gear is provided with an external gear corresponding to the internal gear, and the internal gear and the external gear are partially meshed, The flexible external gear has a mounting hole,
The wave generator is disposed in the mounting hole, and the wave generator includes a cam and a bearing;
The inner ring of the bearing is fitted to the cam, the outer ring of the bearing is in contact with the inner peripheral surface of the mounting hole, and a plurality of rolling elements are provided between the inner ring and the outer ring,
The self-lubricating device is provided on one side of the bearing, and the self-lubricating device includes a base, an oil retaining member, and a lubricating member,
The oil-reducing member is disposed on the base, and the oil-retaining member includes a self-lubricating device that contacts the lubricating member. A wave reducer comprising the self-lubricating device according to claim 1,
The base seat is provided with a concave groove and a through hole, and the concave groove communicates with the through hole,
The oil-impregnated member is disposed in the concave groove,
The lubricating member is disposed in the through hole;
The lubrication member is a wave reducer provided with a self-lubricating device having one end in contact with the oil-impregnated member and the other end in contact with the rolling element or the inner ring of the bearing. A wave reducer comprising the self-lubricating device according to claim 1,
The cam is provided with a plurality of fixing holes,
The base seat is provided with a plurality of fixing columns corresponding to the plurality of fixing holes,
A wave reducer provided with a self-lubricating device in which the base is fixed to a side surface of the bearing by fitting the fixing hole and the fixing column to each other. A wave reducer comprising the self-lubricating device according to claim 1,
Furthermore, the wave reducer provided with the self-lubricating apparatus containing the outer cover covered on the outer side of the said self-lubricating apparatus.

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