KR101973662B1 - Reducer with an intermittent lubricating device - Google Patents

Abstract

A reducer with an intermittent lubricating device comprises an oil storage space in a body, and a contact member is elastically arranged in the oil storage space. A rigid internal gear includes an oil channel communicating with the oil storage space and internal teeth of the rigid internal gear. A pressurization member is more provided to be intermittently in contact with the contact member by moving by an inner ring or an elastic tooth type ring, and lubricating oil in the oil storage space is discharged in an intermittent manner to lubricate an engagement portion and a bearing between internal and external teeth. Therefore, intermittent lubrication can be achieved without continuous oil supply.

Description

REDUCER WITH AN INTERMITTENT LUBRICATING DEVICE,

The present invention relates to a reduction device, in particular a reducer with an intermittent lubrication device.

A harmonic reducer is a type of reducer with a high reduction ratio. A typical harmonic reducer generally includes a stiffness internal gear, an elastic stance gear disposed in the stiffness internal gear, and a wave generator rotatably disposed in the elastic stance gear. When the wave generator is assembled on the elastic shout gear, the elastic shout gear will be pressed in an elliptical shape by the outer edge of the wave generator, so that when the wave generator is rotationally driven by the power source, the stiffness internal gear and the flexible shout gear They can be fully engaged with each other along the major axis, but are completely disengaged from each other along the minor axis. Due to the difference in the number of teeth of the rigid inner ring and the elastic outer tooth cup, when the wave generator rotates, the difference in the number of teeth can achieve a high reduction ratio effect, thereby producing a high torque output.

In order to extend life and reduce wear, there are a variety of conventional lubrication designs. For example, the reduction gear disclosed in US 20080245172A1 is provided with an additional oil supply hole and an oil discharge hole, and the design of the oil supply channel allows the lubricant to simultaneously lubricate the rigid gear, the elastic gear and the bearing. Through the continuous lubrication process, the lubricant can flow out of the oil feed hole and lubricate the wave generator. However, the reduction gear requires continuous oil supply. Otherwise, there will be no lubrication cycle. On the other hand, the reduction gear disclosed in US 5984048A is provided with a seal ring on the elastic gear to prevent the lubricating oil from entering the input shaft. However, this design can detach only the different lubricants, and since it can not replenish the lubricant, it will adversely affect the lubrication effect.

The present invention seeks to eliminate and / or mitigate the above-mentioned disadvantages.

It is an object of the present invention to provide a reducer with an intermittent lubrication apparatus capable of achieving intermittent lubrication without continuous oil supply.

Another object of the present invention is to provide a reducer equipped with an intermittent lubricating device capable of replenishing lubricating oil.

In order to achieve the above object, a reducer having an intermittent lubrication apparatus includes a first end surface, a second end surface opposed to the first end surface, a receiving hole penetrating the first and second end surfaces, Wherein the oil storage space has a first oil supply hole penetrating the inner surface and a second oil supply hole communicating with the second oil supply hole and the second oil supply hole, An oil supply hole; A rigid internal gear disposed in a receiving hole of a main body and including a plurality of internal teeth and an oil channel, wherein the oil channel has a first lubricating hole communicating with the second oil supplying hole and a second lubricating hole communicating with the internal teeth A rigid internal gear; A bearing including an outer ring disposed in a receiving hole of the main body and an inner ring rotatable with respect to the outer ring; An elastic shout gear rotatably meshing with a rigid internal gear and rotatably engaged with an internal ring and including an output shaft and an elastic toothed ring, wherein the resilient toothed ring includes a plurality of external teeth engaged with the internal teeth, ; A wave generator disposed in the elastic toothed ring and including an input shaft; A contact member resiliently disposed in the oil reservoir space and movable between a normal position and a start position and including a contact portion sealing the first oil supply hole and partially projecting from the inner surface, The contact member presses the lubricating oil in the oil storage space from the first lubricating hole to the second lubricating hole so that the lubricating oil flows out from the second lubricating hole A contact member; A pressing member which is disposed on the inner ring or the elastic toothed ring and includes a pressing portion that presses the contact portion of the contact member, wherein when the pressing portion presses the contact portion, the contact member is in the start position and the pressing portion does not press the contact portion , The contact member includes a pressing member at a normal position.

Preferably, the oil storage space further includes an oil supply slot sealed with a sealing plate, and an elastic member is disposed between the contact member and the sealing plate to elastically press the contact member to return to the normal position.

Preferably, the pressing member further includes a fixing portion fixed to the inner ring and connected to the pressing portion, and the pressing portion extends between the inner and outer rings of the bearing.

The reducer provided with the intermittent lubrication apparatus includes an oil storage space in the body, and the contact member is elastically disposed in the oil storage space. The rigid internal gear includes an oil passage communicating with the oil reservoir space and the internal teeth of the rigid internal gear. The reducer is further provided with a pressing member which is moved by the inner ring or the elastic toothed ring and intermittently contacts the contact member so that the lubricating oil in the oil storage space is discharged in an intermittent manner to lubricate the engaging portion between the inner and outer teeth and the bearing . Thus, intermittent lubrication can be achieved without continuous oil supply.

These, together with other objects of the invention, will be pointed out in particularity in the claims annexed to and forming a part hereof, together with various novel features which characterize the invention. For a better understanding of the present invention, its operating advantages, and the specific advantages attained by its use, reference is made to the accompanying drawings and detailed description of preferred embodiments of the invention.

According to the present invention, it is possible to provide a reducer equipped with an intermittent lubrication device capable of achieving intermittent lubrication without continuous oil supply. Further, according to the present invention, it is possible to provide a reducer equipped with an intermittent lubrication device capable of replenishing lubricating oil.

1 is an exploded view of a reducer with an intermittent lubrication apparatus according to a preferred embodiment of the present invention;
2 is an assembly view of a reducer with an intermittent lubrication apparatus according to a preferred embodiment of the present invention.
3 is a cross-sectional view of a reducer with an intermittent lubrication apparatus in accordance with a preferred embodiment of the present invention.
4 is a cross-sectional view taken along line 4-4 of FIG. 3;
5 is an operational view of the present invention showing the pressing member in contact with the contact member;
Figure 6 is a cross-sectional view taken along line 6-6 of Figure 5;

The present invention will become more apparent from the following description taken in conjunction with the accompanying drawings, which illustrate, by way of illustration only, a preferred embodiment of the invention.

1 to 4, a reducer having an intermittent lubrication apparatus according to a preferred embodiment of the present invention includes a main body 10, a rigid internal gear 20, a bearing 30, a resilient external gear 40, a wave generator 50, two contact members 60, and a pressing member 70.

The body 10 is rectangular and has a first end face 11 and an opposing second end face 12 and an inner face 131 passing through the first and second end faces 11 and 12 An outer side surface 14 connected between the receiving end 13 and the first and second end surfaces 11 and 12 and an oil storage recessed from the outer side surface 14 to the inner surface 131, And includes a space 15. The oil storage space 15 includes a first oil supply hole 151 and a second oil supply hole 152 which pass through the inner surface 131. In this embodiment, the oil storage space 15 further includes two symmetrical oil supply slots 153 each sealed with a sealing plate 91, and each sealing plate 91 is provided with three positioning holes 911 Is provided.

The rigid internal gear 20 is disposed in the receiving hole 13 of the main body 10 and includes a plurality of internal teeth 21 and an oil channel 22. The oil channel 22 includes a first lubricant hole 221 communicating with the second oil supply hole 152 and a plurality of second lubricant holes 222 communicating with the internal tooth 21. In this embodiment, an axial oil passage 22A and a radial oil passage 22B communicating with the axial oil passage 22A are included. The first lubricating hole 221 is formed in the axial oil passage 22A and the second lubricating hole 222 is formed in the radial oil passage 22B.

The bearing 30 includes an outer ring 31 disposed in the receiving hole 13 of the body 10 and an inner ring 32 rotatable relative to the outer ring. In this embodiment, the bearing is a roller bearing, and the clearance between the inner ring and the outer ring 32, 31 extends along the inner surface 131 of the body 10.

The elastic shout gear 40 has an output shaft 41 rotatably engaged with the internal gear 32 and inserted into the internal ring 32 and an elastic toothed ring 42 connected to the output shaft 41 . The elastic toothed ring 42 includes a plurality of external teeth 421 engaged with the internal teeth 21 and the output shaft 41 extends outside the body 10. [

The wave generator (50) is disposed in the elastic toothed ring (42) and includes an input shaft (51). In this embodiment, the input shaft 51 extends to the outside of the main body 10. The cover 92 is fixed to one end of the main body 10 by a screw 96 and includes an insertion hole 921 for insertion of the input shaft 51 of the wave generator 50.

The contact member 60 is resiliently disposed in the oil reservoir 15 and movable between a normal position (shown in Figures 3 and 4) and a starting position (shown in Figures 5 and 6) 1 oil supply hole 151 and partially protruding from the inner surface 131. The oil supply hole 151 is formed in the oil supply hole 151, The contact member 61 further protrudes from the inner surface 131 at a normal position than the starting position and when the contact member 60 moves between the normal position and the starting position, the contact member 60 moves from the first lubricating hole 221 to the second lubricating hole The lubricating oil in the oil storage space 15 is pressurized by the second lubricating hole 222, so that the lubricating oil will flow out from the second lubricating hole 222. In this embodiment, each of the contact members 60 is resiliently disposed in the oil reservoir space 15 by the elastic member 93. Each elastic member 93 includes a first end 931 disposed in the positioning hole 911 and a second end 932 contacting the corresponding one of the contact members 60, It is possible to resiliently press the corresponding one of the contact members 60 to return.

The pressing member 70 is disposed on the inner ring 32 of the bearing 30 and has a fixing portion 71 fixed to the inner ring 32 and a fixing portion 70 connected to the fixing portion 71, And a pressing portion 72 serving to press the contact portion 61. [ The pressing portion 72 extends between the inner and outer rings 32, 31 of the bearing 30. Of course, the urging member 70 may be disposed on the resilient tooth ring 42 of the elastic shout gear 40, that is, on a relative part that rotates together with the elastic shout gear 40, such as on the output shaft 41 have.

The above description relates to the structural relationship of the parts of the first embodiment. It is possible to cause elastic deformation of the elastic toothed gear 42 of the elastic shout gear 40 by pressing the input shafts 51 of the wave generator 50 to rotate, 421 will be engaged with the internal teeth 21 of the rigid internal gear 20 and the engagement portion between the internal gear 20 and the external gear 40 will move along the annular path, The output shaft 41 of the output shaft 40 outputs a torque at a low rotational speed. Further, when the reducer of the present invention rotates at low speed, the intermittent lubrication will be described below.

3 to 6, when rotating at a low speed, the output shaft 41 will drive the bearing 30 to rotate, and the pressing member 70 mounted on the inner ring 32 will also rotate will be. The pressing portion 72 of the pressing member 70 presses the contact portion 61 of the contact member 60 to move the contact member 60 from the normal position to the starting position Will move. At this time, the contact member 60 presses the lubricating oil in the oil storage space 15 and presses the second oil supply hole 152, the first lubricating hole 221, the axial oil passage 22A, the radial oil passage 22B. ≪ / RTI > The lubricating oil flows out from the second lubrication hole 222 to the internal teeth 21 and the internal teeth 21 of the rigid internal gear 20 are elastically deformed by the second lubricating holes 222 communicating with the internal teeth 21. [ The external teeth 421 of the external gear 40 can be lubricated. The lubricating oil output from the second lubricating hole 222 then flows out to the inner and outer rings 32 and 31 of the bearing 30 through the inner surface 131 of the main body 10 to intermittently lubricate the bearing So that intermittent lubrication can be achieved without continuous oil supply.

In addition, when the pressing portion 72 of the pressing member 70 is moved from the normal position to the starting position by pressing the contact portion 61, the contact member 60 will compress the elastic member 93. When the pressing portion 72 of the pressing member 70 is disengaged from the contacting portion 61 of the contact member 60, the elastic member 93 is uncompressed so that the contact member 60 can be disengaged from the elastic shout gear 40 And the contact member 60 is moved to return from the starting position to the normal position and waits to be pressed again by the pressing member 70. [

The contact member 60 is resiliently disposed in the oil storage space 60 while the contact portion 61 protrudes from the inner surface 131 and the inner ring 32 or the resilient- A pressing member 70 that is moved by the pressing member 42 and intermittently contacts the contact member 60 is further provided so that the lubricating oil in the oil storing space 15 is discharged in an intermittent manner to form the inner and outer teeth 21 and 421 And the bearing 30 can be lubricated. Thus, intermittent lubrication can be achieved without continuous oil supply.

The oil storage space 15 of the main body 10 is provided with the oil supply slot 153 sealed by the seal plate 91 and therefore the lubricant can be replenished by removing the seal plate 91, Thereby improving the overall lubrication effect.

While various embodiments of the present invention have been shown and described, it will be apparent to those skilled in the art that there may be additional embodiments within the scope of the present invention.

10: Body
20: Stiffness internal gear
30: Bearings
40: elastic shout gear
50: Wave generator
60: contact member
70: pressing member

Claims (3)

A reducer having an intermittent lubrication device,
(12), a receiving hole (13) passing through the first and second end faces (11, 12), and a second end face A main body (10) comprising an outer side surface (14) connected between side surfaces (11,12) and an oil storage space (15) recessed from the outer side surface (14) 13) has an inner surface (131) and the oil storage space (15) includes a first oil supply hole (151) and a second oil supply hole (152) penetrating the inner surface (131) (10);
Wherein the oil channel (22) is a rigid internal gear (20) disposed in the receiving hole (13) of the body (10) and including a plurality of internal teeth (21) A rigid internal gear (20) including a first lubricating hole (221) communicating with the supply hole (152) and a second lubricating hole (222) communicating with the internal tooth (21);
A bearing 30 including an outer ring 31 disposed in the receiving hole 13 of the body 10 and an inner ring 32 rotatable relative to the outer ring 31;
And an elastic tooth gear (40) rotatably engaged with the stiffness internal gear (20) and including an output shaft (41) inserted into the inner ring (32) and an elastic toothed ring (42) (42) includes a plurality of external teeth (421) engaging with the internal teeth (21); an elastic shout gear (40);
A wave generator (50) disposed in the elastic toothed ring (42) and including an input shaft (51);
A contact portion 61 elastically disposed in the oil storage space 15 and movable between a normal position and a starting position and sealing the first oil supply hole 151 and partially protruding from the inner surface 131; Wherein the contact portion (61) projects further from the inner surface (131) at the normal position than at the starting position, and when the contact portion (61) moves between the normal position and the starting position, The contact member 60 presses the lubricating oil in the oil storage space from the first lubricating hole 221 to the second lubricating hole so that the lubricating oil flows out from the second lubricating hole 222, 60;
A pressing member (70) disposed on the inner ring (32) or the elastic toothed ring (42) and including a pressing portion (72) for pressing the contact portion (61) of the contact member When the pressing portion 72 presses the contact portion 61, the contact member 60 is in the starting position, and when the pressing portion 72 does not press the contact portion 61, (60) comprises a pressing member (70) at said normal position;
Wherein the lubricating device comprises: The oil supply system according to claim 1, wherein the oil storage space (15) further includes an oil supply slot (153) sealed by a seal plate (91), and an elastic member (93) 91) elastically pressurizes the contact member (60) to return to the normal position. 2. The bearing assembly of claim 1, wherein the pressing member (70) further comprises a fixing portion (71) fixed to the inner ring (32) and connected to the pressing portion (72) (32, 31) of said inner and outer rings (30).

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