TW201615999A - Cross roller bearing equips with separator - Google Patents

Abstract

This invention is a cross roller bearing which is equipped with a separator. The cross roller bearing comprises: an outer ring equipped with a ring shaped outside rail; an inner ring equipped with a ring shaped inside rail and arranged on the inner side of the outer ring, wherein the outside rail and the inside rail together form a load path; and a rolling module, which is formed by multiple roller rods and spacers and is provided at the load path. Each of the lateral surfaces of the spacer is equipped with a retaining surface which corresponds to the roller rod; also, the spacer is equipped with a first surface and a second surface which are adjacent to the two retaining surfaces. The first surface is set relative to the second surface. The first surface is equipped with an elastic groove which is installed along the length direction. The bottom of the elastic groove is located at the lower part of the contact line between the roller rod and the retaining surface. An elastic section is defined by the lateral sides of the elastic groove, and can be deformed due to the forces exerted by the roller rod.

Description

Cross roller bearing with spacer

The present invention is a cross roller bearing, and more particularly a spacer used in a cross roller bearing.

For example, the spacer of the cross roller bearing disclosed in Japanese Patent No. 4,440,366 is known from the third drawing of the patent. The spacer is accommodated in a rectangular track and maintains a certain gap with the track. As can be seen from Fig. 4, two adjacent rollers are arranged in a cross pattern on both sides of a spacer. However, during the actual operation of the bearing, the roller will push the spacer. The force causes the spacer to move toward the wall of the orbit, causing the spacer to interfere with the orbit, causing the bearing to run unsmoothly or even jamming. Therefore, how to avoid the push of the spacer becomes a key point in the field. one.

In view of the above problems, the main object of the present invention is to develop a spacer structure capable of absorbing the pushing force of a roller.
To achieve the above object, the present invention is a cross roller bearing having a spacer, comprising: an outer ring having an annular outer track; and an inner ring having an annular inner track, The inner ring system is disposed on the inner side of the outer ring, and the outer track and the inner track system form a load path; a rolling module is composed of a plurality of rollers and a spacer, and a spacer is disposed between the two adjacent rollers. Two adjacent rollers are arranged in a cross arrangement, and both sides of the spacer have a holding surface opposite to the roller, and the spacer has a first end surface, a second end surface, and a second end surface adjacent to the two holding surfaces The third end surface and the fourth end surface are disposed opposite to the second end surface, the third end surface is disposed opposite to the fourth end surface, and the width of the first end surface is smaller than the width of the second end surface, the first end surface The elastic groove is disposed along the longitudinal direction, and the bottom surface of the elastic groove is located below the contact line between the roller and the retaining surface, and the elastic groove is defined as an elastic portion on both sides, and the elastic portion can be The roller is deformed by force.
Preferably, the retaining surface is formed by arc surfaces of two different centers, the radius of the arc surface being greater than the radius of the roller.
Preferably, the second end surface, the third end surface and the fourth end surface are a plane.
Preferably, the second end surface has a groove, the opening width of the elastic groove is larger than the opening width of the groove, and the depth of the groove is 1/2 of the depth of the elastic groove.
Preferably, the first end surface, the second end surface, the third end surface and the fourth end surface have lubricating oil circulation grooves penetrating the two holding surfaces.
Preferably, the spacer has a consistent perforation through the two retaining surfaces.
Thereby, the elastic groove provided by the first end surface of the spacer makes the elastic portion of the elastic groove have elasticity, and when the roller applies a pushing force to the spacer, the elastic portion will Absorbs the pushing force of the roller while avoiding the displacement of the spacer and touching the wall of the load path.

90‧‧‧cross roller bearings
1‧‧‧ outer ring
11‧‧‧External orbit
2‧‧‧ Inner Ring
21‧‧‧ inner orbit
3‧‧‧ rolling module
31, 31A‧‧ ‧ Roller
32‧‧‧ Spacer
321‧‧‧ Keep face
322‧‧‧Flexible groove
3221‧‧‧ bottom
323‧‧‧Lubricating oil circulation tank
324‧‧‧second end face
325‧‧‧ first end
3251‧‧‧Flexible Department
326‧‧‧through holes
327‧‧‧3rd end face
328‧‧‧fourth end face
329‧‧‧ Groove
3291‧‧‧ bottom
T1, T2‧‧‧ width
A‧‧‧contact line
H1‧‧‧Deep groove depth
H2‧‧‧The distance from the first end to the contact line
H3‧‧‧Deep depth
3251, 3251A‧‧‧ Elastic Department
Radius of R1, R2, R3‧‧
W1, W2‧‧‧ opening width

The first figure is a system diagram of the crossed roller bearing with spacers of the present invention.
The second figure is a combination view of the crossed roller bearing with spacers of the present invention.
The third figure is a perspective view of the spacer of the present invention.
The fourth figure is a schematic view of the spacer and the roller of the present invention, and shows the shape of the elastic groove on one side when the roller gives a pushing force to the spacer.
The fifth figure is a view of the spacer end of the present invention.
The sixth figure is a schematic plan view of the spacer of the present invention in cooperation with the roller.
The seventh drawing is a structural view of another embodiment of the spacer of the present invention.

Referring to the first to seventh figures, the present invention is a spacer cross roller bearing (90) comprising: an outer ring (1) having an annular outer track (11) An inner ring (2) having an inner ring (21), the inner ring (2) being disposed inside the outer ring (1), the outer track (11) and the inner track (21) Forming a load path; a rolling module (3) consisting of a plurality of rollers (31) and a spacer (32), and a spacer (32) is disposed between the adjacent rollers (31), two phases Adjacent to the roller (31) is arranged in a cross as shown in the first figure, the spacer (32) has a holding surface (321) opposite to the roller (31), and the spacer (32) has The two holding surfaces (321) are adjacent to the first end surface (325), the second end surface (324), the third end surface (327) and the fourth end surface (328). The first end surface (325) is opposite to the second surface. The end surface (324) is disposed, the third end surface (327) is disposed opposite to the fourth end surface (328), and the width (T1) of the first end surface (325) is greater than the second a width (T2) of the surface (324), the first end surface (325) is provided with an elastic groove (322) disposed along the length direction, and two sides of the elastic groove (322) are defined as an elastic portion (3251), The elastic portion (3251) is deformed by the force applied by the roller (31), and the bottom surface (3221) of the elastic groove (322) is located at a contact line between the roller (31) and the holding surface (321) ( Below A), as can be seen from the fourth figure, the elastic groove depth (H1) is greater than the distance from the first end face to the contact line (H2), and the ratio of the two is best calculated after research: The distance from one end to the contact line (H2) = 0.4 to 0.65 times the elastic groove depth (H1). The second end surface (324), the third end surface (327) and the fourth end surface (328) are a plane, so that the pushing force of the roller (31) is absorbed by the elastic portion (3251), as described in As shown in a partial enlarged view of the four figures, the elastic portion (3251A) is deformed by the absorbing force of the absorbing roller (31A) (such as the contour of the imaginary line), and when the pushing force of the roller (31) disappears, the The elastic portion (3251) returns to its original shape. The spacer is manufactured by plastic injection molding.
Furthermore, in order to provide a good lubricating oil circulation path for the spacer (32), the roller (31) and the load path (32) are sufficiently lubricated, and the present invention enhances the lubricating oil circulation effect by the following means:
1. The retaining surface (321) is formed by two curved surfaces of different centers, as shown in the sixth figure, the radius of the curved surface (R2, R3) is greater than the radius (R1) of the roller (31), so that There is two line contact between the roller (31) and the holding surface (321), and the remaining between the roller (31) and the holding surface (321) is a gap for lubricating oil to flow, as shown in the sixth figure.
The second end surface (324) has a recess (329), the opening width (W1) of the elastic recess (322) is greater than the opening width (W2) of the recess (329), and the recess ( The depth (H3) of 329) is smaller than the depth (H1) of the elastic groove (322), and the relationship between the depth and the width between the groove (329) and the elastic groove (322) is defined, mainly to avoid the groove. The sides of (329) also have the same function of elasticity, so as to maintain the function of the elastic groove (322), which can improve the storage of lubricating oil to avoid too little storage of lubricating oil. Always replenish the lubricant.
The first end surface (325), the second end surface (324), the third end surface (327), and the fourth end surface (328) have lubricating oil circulation grooves (323) penetrating through the two holding surfaces (321). The arrangement of the lubricating oil circulation groove (323) can enhance the lubricating oil circulation effect between the end faces (325, 324, 327, 328) of the spacer (32) and the load path.
4. The spacer (32) further has a continuous perforation (326) extending through the two retaining surfaces (321), so as to enhance the flow of lubricating oil between the two adjacent rollers (31), for example: on the roller (31) In the forward rotation and the reverse rotation, the lubricating oil is caused to flow between the adjacent rollers (31) through the through hole (326).
In view of the above, the "industrial availability" of the present invention should be unquestionable. In addition, the feature technology disclosed in the embodiment of the present invention has not been seen in publications before the application, nor has it been disclosed. The use of not only has the fact that the effect is improved as described above, but also has an additional effect that cannot be neglected. Therefore, the "novelty" and "progressiveness" of the present invention are in compliance with the patent regulations, and the application for the invention patent is filed according to law. Please give us a review and grant a patent as soon as possible.
The above description of the embodiments is intended to be illustrative of the invention and is not intended to limit the scope of the invention.

32‧‧‧ spacer

321‧‧‧ Keep face

322‧‧‧Flexible groove

3221‧‧‧ bottom

323‧‧‧Lubricating oil circulation tank

324‧‧‧second end face

325‧‧‧ first end

3251‧‧‧Flexible Department

327‧‧‧3rd end face

328‧‧‧fourth end face

T1, T2‧‧‧ width

Claims (1)

A cross roller bearing having a spacer, comprising: an outer ring having an annular outer track; an inner ring having an annular inner track, the inner ring being disposed on the outer ring In the inner side, the outer rail and the inner rail system form a load path; a rolling module is composed of a plurality of rollers and a spacer, and a spacer is disposed between the two adjacent rollers, and the two adjacent rollers are adjacent to each other. Cross-arranged, each of the two sides of the spacer has a holding surface opposite to the roller, and the spacer has a first end surface, a second end surface, a third end surface and a fourth end surface disposed adjacent to the two holding surfaces, The first end surface is disposed opposite to the second end surface, the third end surface is disposed opposite to the fourth end surface, and the width of the first end surface is greater than the width of the second end surface, and the first end surface is provided with a length direction The elastic groove has a bottom surface located below the contact line between the roller and the retaining surface, and both sides of the elastic groove are defined as an elastic portion, and the elastic portion can be deformed by the force applied by the roller.
2. The spacer roller bearing of claim 1, wherein the second end surface, the third end surface, and the fourth end surface are a flat surface.
3. The cross roller bearing with a spacer according to claim 1, wherein the second end surface has a groove, the opening width of the elastic groove is larger than the opening width of the groove, and the groove is The depth is less than the depth of the elastic groove.
4. The spacer roller bearing of claim 1, wherein the first end face, the second end face, the third end face, and the fourth end face have lubricating oil flow grooves extending through the retaining faces.
5. The spacer cross roller bearing of claim 1, wherein the spacer further has a consistent perforation through the two retaining faces.
6. The cross roller bearing with spacers according to claim 1, wherein the retaining surface is formed by arcuate surfaces of two different centers, the radius of the arc surface being greater than the radius of the roller.
7. The cross roller bearing with a spacer according to claim 1, wherein the elastic groove depth is greater than a distance from the first end surface to the contact line, and the distance from the first end surface to the contact line is 0.4 to 0.65. The elastic groove depth is doubled.