CN110529574B

CN110529574B - Steel ball spacing ring of linear transmission device

Info

Publication number: CN110529574B
Application number: CN201810500481.0A
Authority: CN
Inventors: 杨家铭; 吴政翰; 孙溢隆; 庄裕纬
Original assignee: Hiwin Technologies Corp
Current assignee: Hiwin Technologies Corp
Priority date: 2018-05-23
Filing date: 2018-05-23
Publication date: 2021-09-10
Anticipated expiration: 2038-05-23
Also published as: CN110529574A

Abstract

A steel ball spacer ring of a linear transmission device includes a plurality of spacers, and the effect of adjusting the thickness of the steel ball spacer ring is achieved by cooperating with each other through the convex parts arranged on the spacer and a plurality of concave parts with different depths.

Description

Steel ball spacing ring of linear transmission device

Technical Field

The invention relates to an element of a linear transmission device, in particular to a steel ball spacing ring of the linear transmission device.

Background

Taiwan patent No. 1491817 discloses a transmission element with an adjustable spacer, which includes a first member and a second member. The first member has a first retaining surface at one end and a recess at the other end, and the recess has an internal thread. The second member has a second holding surface at one end and a lug at the other end, and the lug has external threads which can be screwed with the internal threads. The first member or the second member can be relatively rotated by screwing the internal threads and the external threads of the first member and the second member, so that the distance between the first holding surface and the second holding surface and the thickness of the spacer can be adjusted.

However, in the structure in which the internal thread is disposed in the groove of the first member and the external thread is disposed on the protrusion of the second member, in order to make the screwing of the first member and the second member stable, the thickness of the internal thread section of the first member and the external thread section of the second member needs to be increased, which results in an increase in material cost and a reduction in the number of effective steel balls in the circulation path. In addition, the aforesaid internal and external threads are screwed together, so that the first member and the second member may relatively rotate due to the rolling friction of the rolling elements (steel balls), and the distance between the first member and the second member may not be fixed, or may be separated.

Disclosure of Invention

The invention mainly aims to provide a steel ball spacing ring of a linear transmission device, which can adjust the thickness of the steel ball spacing ring by matching convex parts of a member with concave parts with different depths, thereby achieving the effects of saving material cost and avoiding space change and member separation.

To achieve the above object, according to the present invention, a ball spacer for a linear actuator is inserted into a circulating path of the linear actuator between two rolling elements to fill the circulating path, the ball spacer includes a first spacer having a first retaining surface at one end and a first set of contact surfaces at the other end. The first spacer is provided with a first convex part on the first assembling surface, and the first convex part has a height. A second spacer having a second retaining surface at one end and a second set of junction surfaces at the other end. The second piece spacer forms a first concave part and a second concave part on the second assembly surface, the first concave part and the second concave part respectively have a first depth and a second depth, the first depth is greater than the second depth and the second depth is less than the first height, and the first convex part can be selectively inserted into the first concave part or the second concave part. Therefore, the thickness of the steel ball spacing ring can be adjusted by a user through selecting the first convex part to be inserted into the first concave part or the second concave part. In addition, the combination of the first convex part and the first concave part or the second concave part is adopted, so that the thickness of the spacer is not required to be increased, and the effect of saving material cost can be achieved. After the first convex part is combined with the first concave part or the second concave part, the distance between the first spacing part and the second spacing part is fixed, and the effects of spacing change and separation of the first spacing part and the second spacing part are avoided.

It should be noted that the first convex portion can be a long arc-shaped convex portion, and the first concave portion and the second concave portion are a long arc-shaped groove matching with the first convex portion.

In addition, the number of the first convex portions can be three, and each first convex portion is evenly arranged along a virtual first virtual circle. The number of the first concave parts and the second concave parts on the second set of contact surfaces is three, and each first concave part and each second concave part are respectively and evenly arranged along a second imaginary circle which is the same as the circumference of the first imaginary circle.

In addition, the invention also provides a steel ball spacing ring of the linear transmission device, which comprises two third spacing pieces, wherein one end of each third spacing piece is provided with a third group of junction surfaces, a second convex part, a third concave part and a fourth concave part are arranged on the third group of junction surfaces, the second convex part is provided with a second height, the third concave part and the fourth concave part are respectively provided with a third depth and a fourth depth, the third depth is greater than the fourth depth, and the fourth depth is less than the second height. Therefore, the thickness of the steel ball spacing ring can be adjusted by a user through selecting the second convex part to be inserted into the third concave part or the fourth concave part.

It should be noted that the second protrusion is a long arc protrusion, and the third recess and the fourth recess are long arc grooves matching with the second protrusion.

In addition, the number of the second convex portions, the third concave portions and the fourth concave portions is two, and each of the second convex portions, each of the third concave portions and each of the fourth concave portions are arranged along a third imaginary circle on average.

Drawings

Fig. 1 is a perspective view of a first preferred embodiment of the present invention.

Fig. 2 is an exploded view of the first preferred embodiment of the present invention.

Fig. 3 is a cross-sectional view of fig. 1.

Fig. 4 is a cross-sectional view of fig. 2.

Fig. 5 is a sectional view showing another assembled state.

Fig. 6 is an exploded view of a second preferred embodiment of the present invention.

Fig. 7 is a cross-sectional view of fig. 6.

Fig. 8 is an assembled sectional view of fig. 6.

Fig. 9 is a view showing a state of use of the spacer ring of the present invention.

[ notation ] to show

10 steel ball spacer ring 11 first spacer

111 first retaining surface 112 first set of abutment surfaces

12 second spacer 121 second holding surface

122 second set of 13 first protrusions

14 first recess 15 second recess

20 steel ball spacer ring 21 third spacer

211 third set of junction surfaces 22 second projection

23 third recess 24 fourth recess

C1 first imaginary circle C2 second imaginary circle

C3 third imaginary circle H1 first height

D1 first depth D2 second depth

H2 second height D3 third depth

Fourth depth D4

100 circulation path 200 rolling body

Detailed Description

For a detailed description of the construction and features of the invention, reference will now be made to the following preferred embodiments, taken in conjunction with the accompanying drawings, in which:

referring to fig. 9, the ball spacer ring 10 of the linear actuator according to the present invention is used for being inserted into the circulating path 100 of the linear actuator, and between two rolling elements 200, so that the circulating path 100 is filled up, and the linear actuator may be a ball screw, a bearing, a linear slide rail, a roller screw, etc. The embodiment of the present invention is described as applied to a general ball screw, the ball screw of the linear transmission device includes a long shaft and a moving body capable of sliding on the long shaft, and the long shaft and the moving body are not described herein nor shown in the drawings because they belong to the prior art and are not the main technical features of the present invention, and the rolling element circulation path 200 is filled with steel balls in the rolling element circulation path 100.

As shown in fig. 1 to 5, a ball spacer ring 10 according to a first preferred embodiment of the present invention includes a first spacer 11 and a second spacer 12.

The first spacer 11 has a first holding surface 111 at one end and a first mating surface 112 at the other end. The first spacer 11 has a first protrusion 13 on the first mating surface 112, and the first protrusion 13 has a first height H1 (as shown in fig. 3). It should be noted that, in the present embodiment, three first protrusions 13 are used for illustration, because the combination stability can be enhanced by using three first protrusions 13, but the beneficial effect of the present invention can be achieved by only one first protrusion 13. Each of the first protrusions 13 is an elongated arc-shaped convex strip and is disposed evenly along a virtual first imaginary circle C1.

The second spacer 12 has a second holding surface 121 at one end and a second set of junction surfaces 122 at the other end. The second spacer 12 is provided with three first concave portions 14 and three second concave portions 15 on the second set of contact surfaces 122 in cooperation with the first convex portion 13, and each of the first concave portions 14 and each of the second concave portions 15 are respectively evenly arranged along a second imaginary circle C2 having the same circumferential size as the first imaginary circle C1 in order.

Each of the first concave portions 14 and each of the second concave portions 15 is a long arc-shaped groove matching each of the first convex portions 13, each of the first concave portions 14 and each of the second concave portions 15 respectively has a first depth D1 and a second depth D2, the first depth D1 is greater than the second depth D2, and the second depth D2 is less than the first height H1 (please refer to fig. 3).

With the above structure, the user can selectively insert each first protrusion 13 into each first recess 14 or each second recess 15 to adjust the overall thickness of the steel ball spacer ring 10.

In an actual operation process, the gap between the two rolling elements 200 in the circulation path 100 is small, and the steel ball spacer ring 10 with a small overall thickness needs to be filled, as shown in fig. 4, so that each first protrusion 13 is inserted into each first recess 14 correspondingly. Since the first depth D1 of each first recess 14 is equal to the first height H1 of each first protrusion 13, the first spacer 11 engages with the second spacer 12 to minimize the thickness of the ball spacer ring 10.

However, when the gap between the two rolling elements 200 in the circulation path 100 is large, the steel ball spacer ring 10 having a large thickness as a whole needs to be filled. As shown in fig. 5, each first protrusion 13 can be inserted into each second recess 15, because the second depth D2 of each second recess 15 is smaller than the first height H1, so that a gap is generated between the first spacer 11 and the second spacer 12, and the thickness of the ball spacer ring 10 is increased.

By adjusting the distance between the first spacer 11 and the second spacer 12, the thickness of the ball spacer ring 10 can be changed, and the circulation path 100 can be filled with a plurality of rolling elements 200.

Referring to fig. 6 to 8, a ball spacer 20 of a linear actuator according to a second preferred embodiment of the present invention includes two third spacers 21.

One end of each third spacer 21 has a third set of contact surfaces 211, and each third spacer has two second protrusions 22, two third recesses 23 and two fourth recesses 24 on the third set of contact surfaces 211. It should be noted that, in the present embodiment, two second protrusions 22 are used for illustration, because the combination stability can be enhanced by using two second protrusions 22, but the beneficial effects of the present invention can be achieved by only one second protrusion 22. Each of the second protrusions 22 has a second height H2, each of the third recesses 23 and each of the fourth recesses 24 has a third depth D3 and a fourth depth D4, respectively, each of the third depths D3 is greater than each of the fourth depths D4, and each of the fourth depths D4 is less than each of the second heights H2 (please refer to fig. 7).

It should be noted that each second protrusion 22 is a long arc-shaped convex strip, and each third concave section 23 and each fourth concave section 24 are long arc-shaped concave grooves matching each second protrusion 22. Further, the second convex portions 22, the third concave portions 23, and the fourth concave portions 24 are arranged on average along a third imaginary circle C3.

The user can selectively insert each second protrusion 22 into each third recess 23 or each fourth recess 24 by approaching each third spacer 21, thereby adjusting the overall thickness of the ball spacer 20.

Claims

1. A steel ball spacer ring of a linear transmission device, used to be placed in the circulation path of the linear transmission device and bounded between two rolling bodies, so that the circulation path is filled, the steel ball spacer ring comprises:

A first spacer has a first holding surface at one end and a first assembly surface at the other end, the first spacer is provided with a first convex portion on the first assembly surface, and the first convex portion has a first height;

A second spacer has a second holding surface at one end and a second assembly surface at the other end. The second spacer is provided with a first concave portion and a second concave portion on the second assembly surface. A concave portion and the second concave portion respectively have a first depth and a second depth, the first depth is greater than the second depth and the second depth is smaller than the first height, the first convex portion can be selectively inserted into the first convex portion a recess or the second recess.

2 . The steel ball spacer ring of a linear transmission device according to claim 1 , wherein: the first convex part is a long arc convex part, and the first concave part and the second concave part are matched with the first convex part. 3 . long arc groove.

3 . The steel ball spacer ring of a linear transmission device according to claim 1 , wherein: the number of the first convex parts is three, and each of the first convex parts is evenly arranged along a first imaginary circle; On the second set of junctions, the number of the first concave portion and the second concave portion is three, and each of the first concave portion and each of the second concave portions are along a second imaginary circle with the same size as the circumference of the first imaginary circle. Circle averaging settings.

4. A steel ball spacer ring of a linear transmission device, used to be placed in the circulation path of the linear transmission device and bounded between two rolling bodies, so that the circulation path is filled, the steel ball spacer ring, comprising:

Two third spacers, one end of each third spacer has a third set surface, and a second convex part, a third concave part and a fourth concave part are arranged on the third set surface, the second The convex part has a second height, the third concave part and the fourth concave part respectively have a third depth and a fourth depth, the third depth is greater than the fourth depth and the fourth depth is less than the second height, the The second convex portion can be selectively inserted into the third concave portion or the fourth concave portion.

5 . The steel ball spacer ring of a linear transmission device according to claim 4 , wherein: the second convex part is a long arc convex part, and the third concave part and the fourth concave part are matched with the second convex part. 6 . long arc groove.

6. The steel ball spacer ring of a linear transmission device according to claim 4, wherein the number of the second convex portion, the third concave portion and the fourth concave portion is two, each of the second convex portion, each of the The third concave portion and each of the fourth concave portions are evenly arranged along a third imaginary circle.