CN116136232A

CN116136232A - Roller type linear slide rail

Info

Publication number: CN116136232A
Application number: CN202111365920.XA
Authority: CN
Inventors: 林冠延; 蔡朝轩; 杨文豪; 黄柏翰
Original assignee: Hiwin Technologies Corp
Current assignee: Hiwin Technologies Corp
Priority date: 2021-11-18
Filing date: 2021-11-18
Publication date: 2023-05-19
Anticipated expiration: 2041-11-18
Also published as: CN116136232B

Abstract

The present invention provides a roller type linear slide rail, comprising: a track, a slider sleeved on the track, and end cover units installed at both ends of the slider, wherein one end cover unit includes a first cover plate, a second Cover plate, open end cover, outer end cover, wherein, the first cover plate has a plurality of through holes communicating with non-load passages, the second cover plate is installed on the first cover plate and has through holes communicating with the through holes, and the open end The cover is installed on one end of the slider and has a through hole communicating with the perforation. The outer end cover closes the through hole to allow the plurality of rolling parts to flow back. The present invention consists of the through hole of the open end cover, the through hole of the second cover plate, the second The through hole of a cover plate communicates with the non-load passage, so four rows of rolling elements can be poured in at the same time.

Description

Roller type linear slide rail

Technical Field

The invention relates to the field of linear sliding rails, in particular to a linear sliding rail with a reflux system.

Background

The return system of the linear slide generally comprises a rolling element, a return channel, a return module and the like, and the return system of the linear slide is generally divided into a mode of independent part combination and a mode of integral forming.

The reflux system is a combined mode of independent parts, and can refer to taiwan patent publication No. TWI422762, referring to fig. 1A-1B, the first reflux path R1 of this design is formed by the first reflux pipe 91, the first reflux portion 92 and the first channel 93, the roller W mounted on the first reflux path R1 is poured in through the first column mounting hole 911 penetrating through the first reflux pipe 91, referring to fig. 2A-2B, a cover plate J is further covered outside the first reflux pipe 91, the first column mounting hole 911 is completely closed by the steering portion J1 of the cover plate J, after covering the cover plate J, referring to fig. 3A-3B, the second reflux pipe 97, the second reflux portion 98 and the turning portion J2 of the cover plate J form a second reflux path R2, and a second column mounting hole J21 is opened on the turning portion J2, and the roller W mounted on the second reflux path R2 is poured in through the second column mounting hole J21.

However, in this design, two rows of rollers W accommodated in the first rotary channel R1 need to be poured first during assembly, then the cover plate J is covered to close the first column mounting hole 911, and then the other two rows of rollers W can be poured through the second column mounting hole J21, and finally the end cover is mounted, so that the problem that four rows of rollers cannot be poured at the same time is caused, and further the assembly process is increased, and the assembly time is prolonged.

Disclosure of Invention

In view of the above-mentioned drawbacks of the prior art, an objective of the present invention is to provide a roller-type linear sliding rail, which is mainly aimed at solving the problem that the assembly efficiency is poor due to the fact that four rows of rollers cannot be poured into the same side of a sliding block at a time.

To achieve the above object, the present invention provides a roller type linear slide comprising:

a track;

the sliding block is slidably sleeved on the track and is provided with a plurality of non-load channels, and the sliding block and the track form a plurality of load channels together;

two end cover units installed at two ends of the slider, the end cover units, the load channels and the non-load channels forming a circulation path for the backflow of the plurality of rolling elements, wherein one end cover unit comprises:

a first cover plate mounted on the slider and having a plurality of through holes for communicating with the non-load channels;

the second cover plate is arranged on the other side of the first cover plate facing the sliding block, a first rotary channel is formed between the second cover plate and the first cover plate, the first rotary channel is communicated with the load channel and the non-load channel, and the second cover plate is provided with a plurality of through holes which are respectively communicated with the through holes of the first cover plate;

an open end cover arranged at one end of the sliding block and positioned at the other side of the second cover plate facing the first cover plate, wherein a second rotary channel is formed between the open end cover and the second cover plate, an included angle is formed between the extending direction of the second rotary channel and the extending direction of the first rotary channel, and the open end cover is provided with a plurality of through holes which are respectively communicated with the perforations;

an outer end cap is installed on the open end cap and seals the through holes.

As can be seen from the above, according to the present invention, the through hole of the open end cover, the through hole of the second cover plate, and the through hole of the first cover plate are communicated with the non-load channel, so that the rolling elements can be directly poured into the non-load channel through the through hole, and thus four rows of rolling elements can be simultaneously poured without turning or batch-wise pouring of the rolling elements, and further, the assembly man-hour can be greatly reduced, and the possibility of automation can be improved.

Drawings

FIG. 1A is a schematic diagram of a prior art roller linear slide with rollers loaded in a first rotary track;

FIG. 1B is a cross-sectional view of FIG. 1A;

FIG. 2A is a schematic view of a prior art roller linear slide covered with a cover plate;

FIG. 2B is a cross-sectional view of FIG. 2A;

FIG. 3A is a schematic diagram of a prior art roller linear slide with rollers loaded into a second rotary track;

FIG. 3B is a cross-sectional view of FIG. 3A;

FIG. 4 is a perspective view of the present invention;

FIG. 5 is an exploded view of the present invention;

FIG. 6 is a perspective view of the present invention showing the first cover plate and the slider;

FIG. 7 is a perspective view of the present invention showing the second cover plate and another view of the first cover plate;

FIG. 8 is a perspective view of the present invention showing an alternative view of the second cover plate and the open end cap;

FIG. 9 is a perspective view of the present invention showing an alternative view of the open end cap and the outer end cap;

FIG. 10 is a schematic view of the first cover plate of the present invention mounted on the slider;

FIG. 11 is a schematic view of the second cover plate of the present invention installed outside the first cover plate;

FIG. 12 is a schematic view of an open end cap of the present invention covering the first cover plate and the second cover plate;

FIG. 13 is a cross-sectional view taken along line 13-13 of FIG. 11;

FIG. 14 is a cross-sectional view taken along line 14-14 of FIG. 11;

FIG. 15 is a cross-sectional view taken along line 15-15 of FIG. 4;

FIG. 16 is a perspective view of a second cover plate, closed end cap, attached to the second end of the slider;

fig. 17 is an exploded view of another embodiment of the present invention.

Wherein, prior art:

first return pipe 91

First column mounting hole 911

First return portion 92

First channel 93

First rotary road R1

Second return pipe 97

Second reflux portion 98

Second rotary path R2

Cover plate J

Steering section J1

Turning part J2

Second column mounting hole J21

A roller W;

the invention comprises the following steps:

track 10

First rolling groove 11

Second rolling groove 12

Third rolling groove 13

Fourth rolling groove 14

Slider 20

First end 20A

Second end 20B

Non-load path 21

First non-load path 211

Second non-load path 212

Third non-load path 213

Fourth non-load path 214

First rolling surface 221

Second rolling surface 222

Third rolling surface 223

Fourth rolling surface 224

Cage 30

First cover plate 40

Body portion 41

First turning part 411

Inner side 41A

Outside 41B

Return pipe 42

First return pipe 421

Second return pipe 422

Third return pipe 423

Fourth return line 424

Second cover plate 50

Inner corresponding side 51

First surface of revolution 511

Outer corresponding side 52

Second turning part 521

Perforations 53

First through hole 531

Second through hole 532

Third through hole 533

Fourth through hole 534

Open end cap 60

First side 61

Second surface of revolution 611

Second side 62

Accommodation groove 621

Through hole 63

First through hole 631

Second through hole 632

Third through hole 633

Fourth through hole 634

Outer end cap 70

Shielding portion 71

First shielding portion 71A

Second shielding portion 71B

Guide surface 711

First guide surface 711A

Second guide surface 711B

Connection portion 72

Closed end cap 80

Inner side 81 of the closure

Curved portion 82

Closing convex portion 83

Fixing piece C

Sliding direction X

First rotation direction Y1

Second rotation direction Y2

Load path T

First load path T1

Second load path T2

Third load path T3

Fourth load path T4

Rolling element R

First rotary passage K1

Second rotary passage K2

Third rotary passage K3

Through hole H

And an end cap unit Q.

Detailed Description

Other advantages and effects of the present invention will become apparent to those skilled in the art from the following disclosure, which describes the embodiments of the present invention with reference to specific examples. The invention may be practiced or carried out in other embodiments that depart from the specific details, and the details of the present description may be modified or varied from the spirit and scope of the present invention.

The present invention provides a roller type linear slide, in one embodiment, as shown in fig. 4-16, comprising:

each end cap unit Q is respectively installed at two ends of the slider 20, wherein one end cap unit Q comprises a first cover plate 40, a second cover plate 50, an open end cap 60, an outer end cap 70, and the other end cap unit Q comprises the first cover plate 40, the second cover plate 50 and a closed end cap 80, and the other end cap unit Q comprises:

the track 10 is an elongated member, and the outer peripheral surface of the track 10 is provided with a first rolling groove 11, a second rolling groove 12, a third rolling groove 13 and a fourth rolling groove 14;

the sliding block 20 is slidably sleeved on the track 10, the sliding block 20 is provided with four non-load channels 21 along a sliding direction X, the non-load channels 21 are defined as a first non-load channel 211, a second non-load channel 212, a third non-load channel 213 and a fourth non-load channel 214, the first non-load channel 211 is adjacent to the second non-load channel 212 and is located at one side of the sliding block 20, the third non-load channel 213 is adjacent to the fourth non-load channel 214 and is located at the other side of the sliding block 20, the sliding block 20 has a first rolling surface 221, a second rolling surface 222, a third rolling surface 223 and a fourth rolling surface 224 along the sliding direction X, and the sliding block 20 defines a first end 20A and a second end 20B along the sliding direction X.

The slider 20 and the track 10 together form four load channels T, which are defined as a first load channel T1, a second load channel T2, a third load channel T3, and a fourth load channel T4, the first rolling groove 11 and the first rolling surface 221 together form the first load channel T1, the second rolling groove 12 and the second rolling surface 222 together form the second load channel T2, the third rolling groove 13 and the third rolling surface 223 together form the third load channel T3, and the fourth rolling groove 14 and the fourth rolling surface 224 together form the fourth load channel T4.

Preferably, the sliding block 20 further comprises two retainers 30, wherein the two retainers 30 are mounted on the sliding block 20 for retaining the plurality of rolling elements R, one of the retainers 30 faces the first rolling surface 221 and the second rolling surface 222, and the other retainer 30 faces the third rolling surface 223 and the fourth rolling surface 224.

As shown in fig. 5-7, the first cover plates 40 have a body portion 41 and four return pipes 42 connected to the body portion 41, the return pipes 42 respectively penetrating through a through hole H penetrating through the body portion 41, one of the first cover plates 40 being disposed at the first end 20A of the slider 20, the other of the first cover plates 40 being disposed at the second end 20B of the slider 20, the body portion 41 having opposite first inner side 41A and first outer side 41B along the sliding direction X, the return pipes 42 being connected to the inner side 41A, the return pipes 42 defining first return pipes 421, first second return pipes 422, third return pipes 423 and first fourth return pipes 424, the first return pipe 421 of the first cover plate 40 at the first end 20A being inserted into the first non-load channel 211, the second return pipes 422 being inserted into the second non-load channel 212, the third return pipe 423 being inserted into the third non-load channel 213, the fourth return pipe 424 being inserted into the fourth non-load channel 214, the first return pipe 423 of the first cover plate 40 at the second end 20B being inserted into the second end of the non-load channel 40 being in abutment with the second cover plate 40, the other return pipe 422 being inserted into the second non-load channel 212, the second cover plate 40 being inserted into the second non-load channel 40 being abutted with the second cover plate 40 at the second end of the second cover plate 40B being inserted into the second non-load channel 40, the second return pipe 422 being inserted into the second end of the second cover plate 40 being abutted with the second return pipe 40 being inserted into the second return pipe 40, and the second return pipe 40 being inserted into the second return pipe communication with the second return pipe 40 being inserted into the second return pipe communication port, the through holes H are used for accommodating the rolling elements R.

The outer side 41B of each main body 41 has two first turning parts 411, and the two first turning parts 411 extend along a first turning direction Y1, wherein one of the first turning parts 411 is connected to the first return pipe 421, and the other first turning part 411 is connected to the fourth return pipe 424.

As shown in fig. 5 and 7, the second cover plates 50 are disposed on the outer side 41B of the first cover plate 40, the second cover plates 50 have an inner corresponding side 51 and an outer corresponding side 52 opposite to each other along the sliding direction X, the inner corresponding side 51 has two first rotation surfaces 511, the first rotation surfaces 511 are cambered surfaces, the first rotation surfaces 511 extend along the first rotation direction Y1, and the first rotation surfaces 511 face the first rotation portions 411 and jointly form a first rotation channel K1;

referring to fig. 10 and 15, one of the first rotary passages K1 at the first end 20A is in communication with the first non-load passage 211 and the second load passage T2, the other of the first rotary passages K1 is in communication with the fourth non-load passage 214 and the third load passage T3, one of the first rotary passages K1 at the second end 20B is in communication with the second non-load passage 212 and the first load passage T1, and the other of the first rotary passages K1 is in communication with the third non-load passage 213 and the fourth load passage T4.

Referring to fig. 7, the second cover 50 has four through holes 53, the through holes 53 are a first through hole 531, a second through hole 532, a third through hole 533 and a fourth through hole 534, the position of the first through hole 531 corresponds to the first non-load channel 211, the position of the second through hole 532 corresponds to the second non-load channel 212, the position of the third through hole 533 corresponds to the third non-load channel 213, the position of the fourth through hole 534 corresponds to the fourth non-load channel 214, referring to fig. 8, the outer corresponding side 52 has two second rotating parts 521, the two second rotating parts 521 extend along a second rotating direction Y2, an included angle is formed between the second rotating direction Y2 and the first rotating direction Y1, and preferably, the second rotating direction Y2 is perpendicular to the first rotating direction Y1.

As shown in fig. 5, 8 and 9, the open end cover 60 is covered outside the first cover 40 and the second cover 50, the open end cover 60 is located at the first end 20A of the slider 20, the open end cover 60 has a first side 61 and a second side 62 opposite to each other along the sliding direction X, the first side 61 faces the second cover 50, the second side 62 faces away from the second cover 50, the first side 61 has two second rotating surfaces 611, the second rotating surfaces 611 extend along the second rotating direction Y2, the second rotating surfaces 611 are cambered surfaces, the second rotating surfaces 611 face the second rotating portions 521 and form a second rotating channel K2 together, referring to fig. 15, the position of the second rotating channel K2 in the sliding direction X is different from the position of the first rotating channel K1 in the sliding direction X, the first rotating channel K1 is closer to the slider 20 than the second rotating channel K2, one of the second rotating channels K2 is in communication with the second non-load channel 212, the second load channel T1 and the third load channel T4 are in communication with the other load channel T2.

Referring to fig. 8 and 9, the open end cap 60 has four through holes 63, the through holes 63 are a first through hole 631, a second through hole 632, a third through hole 633 and a fourth through hole 634, the position of the first through hole 631 corresponds to the first through hole 531, the position of the second through hole 632 corresponds to the second through hole 532, the position of the third through hole 633 corresponds to the third through hole 533, the position of the fourth through hole 634 corresponds to the fourth through hole 534, and the second side 62 has a receiving slot 621.

As shown in fig. 9, the outer end cover 70 has four shielding portions 71, the shielding portions 71 respectively close the first through hole 631, the second through hole 632, the third through hole 633 and the fourth through hole 634, wherein a connecting portion 72 is connected between two of the shielding portions 71 and another two of the shielding portions 71, the connecting portion 72 is accommodated in the accommodating groove 621, in this embodiment, the shielding portions 71 are bumps, the shielding portions 71 extend along the sliding direction X, the shielding portions 71 respectively have a guiding surface 711, the guiding surfaces 711 are cambered surfaces, the guiding surfaces 711 are formed as side walls of the first rotating channel K1 or the second rotating channel K2, and the guiding surfaces 711 are used for guiding the rolling members R to rotate.

In a preferred embodiment, referring to fig. 9 and 15, the shielding portions 71 can be further divided into two first shielding portions 71A and two second shielding portions 71B, the two first shielding portions 71A close the first through hole 631 and the fourth through hole 634, the two second shielding portions 71B close the second through hole 632 and the three-way hole 633, the length of the first shielding portion 71A along the sliding direction X is greater than the length of the second shielding portion 71B along the sliding direction X, the guiding surface 711 of the two first shielding portions 71A is a first guiding surface 711A, the first guiding surface 711A is a sidewall of the first rotating channel K1, the guiding surface 711 of the two second shielding portions 71B is a second guiding surface 711B, and the second guiding surface 711B is a sidewall of the second rotating channel K2.

As shown in fig. 5 and 16, the closed end cover 80 is covered outside the first cover 40 and the second cover 50, the closed end cover 80 is located at the second end 20B of the sliding block 20, the closed end cover 80 has a closed inner side 81, the closed inner side 81 faces the second cover 50, the closed inner side 81 has two curved portions 82, the curved portions 82 extend along the second rotation direction Y2, the curved portions 82 face the second rotation portions 521 and form a third rotation channel K3 together with the second rotation portion 521, referring to fig. 15, the position of the third rotation channel K3 in the sliding direction X is different from the position of the first rotation channel K1 in the sliding direction X, the first rotation channel K1 is closer to the sliding block 20 than the third rotation channel K3, one of the third rotation channel K3 is in communication with the first non-load channel 211, the second load channel T2, the other third rotation channel K3 is in communication with the fourth non-load channel 214, the third load channel T3, the other third load channel T3 is in communication with the third load channel T3, the other third rotation channel K3 has another closure protrusion 83, the other closure protrusion 83 is close to the fourth closure protrusion 83, and the closure protrusion 83 is close to the closure protrusion 83.

Preferably, referring to fig. 5, there are two fixing members C, wherein one of the fixing members C is locked to the open end cap 60, so that the outer end cap 70 is located between the fixing member C and the open end cap 60 to fix the outer end cap 70, and the other fixing member C is locked to the closed end cap 80 to fix the closed end cap 80.

In another embodiment of the present invention, please refer to fig. 17, which includes:

a track 10, a slider 20, and two end cap units Q, each of the end cap units Q is respectively mounted at two ends of the slider 20, and the two end cap units Q respectively comprise a first cover 40, a second cover 50, an open end cap 60, and an outer end cap 70:

the sliding block 20 is slidably sleeved on the track 10 and provided with a plurality of non-load channels 21, and the sliding block 20 and the track 10 jointly form a plurality of load channels T, and the sliding block 20 defines the first end 20A and the second end 20B along the sliding direction X;

the first cover plates 40 are respectively installed at the first end 20A and the second end 20B of the slider 20, and the first cover plates 40 have a plurality of through holes H communicating with the non-load channels 21;

the second cover plates 50 are respectively arranged at the first end 20A and the second end 20B of the sliding block 20, the second cover plates 50 are respectively arranged at the other side of the first cover plate 40 facing the sliding block 20, the first rotary channel K1 is formed between the second cover plate 50 and the first cover plate 40, the first rotary channel K1 is communicated with the load channel T and the non-load channel 21, and the second cover plate 50 is provided with a plurality of through holes 53 respectively communicated with the through holes H of the first cover plate 40;

two open end caps 60 respectively mounted at the first end 20A and the second end 20B of the slider 20, wherein each open end cap 60 is located at the other side of one of the second cover plates 50 facing the first cover plate 40, the second rotary channel K2 is formed between the open end cap 60 and the second cover plate 50, an included angle is formed between the extending direction of the second rotary channel K2 and the extending direction of the first rotary channel K1, and the open end cap 60 has a plurality of through holes 63 respectively communicating with the through holes 53; and

and outer end caps 70 respectively installed on the open end caps 60 and closing the through holes 63.

The above description is a configuration of the main components of each embodiment of the present invention, and the operation mode and the efficacy of the present invention are as follows:

referring to fig. 10 and 15, when the rolling elements R roll, they can move from the first non-load channel 211 to the first end 20A, move to the second load channel T2 through the first rotating channel K1, move to the second end 20B, and then enter the first non-load channel 211 again through the third rotating channel K3; referring to fig. 11 and 15, the rolling element R located in the second non-load channel 212 moves to the first end 20A, moves to the first load channel T1 through the second rotating channel K2, moves to the second end 20B, and then enters the second non-load channel 212 again through the first rotating channel K1; the rolling elements R are circulated in the third load path T3, the fourth load path T4, the third non-load path 213, and the fourth non-load path 214 in the same manner as in the first load path T1, the second load path T2, the first non-load path 211, and the second non-load path 212, and thus the description thereof will be omitted.

Referring to fig. 12, the through holes 63 of the open end cover 60, the through holes 53 of the second cover 50, and the through holes H of the first cover 40 are communicated with the non-load channel 21, so that the rolling elements R can be directly poured into the non-load channel 21 through the through holes 63, the through holes 53, and the through holes H, and further four rows of rolling elements R can be simultaneously poured without turning or pouring the rolling elements R in batches, thereby greatly reducing assembly time and improving automation possibility.

In addition, the first cover plate 40 and the second cover plate 50 can be symmetrically arranged at the first end 20A and the second end 20B of the sliding block 20 in a same mode, so that compared with the prior art that the designs of the elements at the open end and the closed end are different, the die opening cost can be saved, and the automatic assembly efficiency can be improved.

It should be noted that, the illustrations provided in the present embodiment merely illustrate the basic concept of the present invention by way of illustration, and only the components related to the present invention are shown in the drawings and are not drawn according to the number, shape and size of the components in actual implementation, and the form, number and proportion of the components in actual implementation may be arbitrarily changed, and the layout of the components may be more complex.

The above embodiments are merely illustrative of the principles of the present invention and its effectiveness, and are not intended to limit the invention. Modifications and variations may be made to the above-described embodiments by those skilled in the art without departing from the spirit and scope of the invention. Accordingly, it is intended that all equivalent modifications and variations of the invention be covered by the claims, which are within the ordinary skill of the art, be within the spirit and scope of the present disclosure.

Claims

1. A roller linear slide comprising:

a track;

a sliding block slidably sleeved on the track and having a plurality of non-load channels

The sliding block and the track form a plurality of load channels together;

an outer end cap is installed on the open end cap and seals the through holes.

2. The roller linear slide of claim 1, wherein: the extending direction of the second rotary channel is perpendicular to the extending direction of the first rotary channel.

3. The roller linear slide of claim 1, wherein: the other end cover unit comprises a first cover plate, a second cover plate and a closed end cover.

4. The roller linear slide of claim 1, wherein: the other end cap unit comprises the first cover plate, the second cover plate, the open end cap and the outer end cap.

5. A roller linear slide as claimed in claim 3, wherein: the sliding block is provided with four rolling surfaces along a sliding direction, a first end and a second end are defined by the sliding block along the sliding direction, and the non-load channels penetrate through the first end and the second end of the sliding block;

the outer peripheral surface of the track is provided with a plurality of opposite rolling grooves, the rolling grooves and the rolling surfaces jointly form the load channels, and the number of the load channels and the non-load channels is four;

one of the first cover plates is arranged at the first end of the sliding block, the other first cover plate is arranged at the second end of the sliding block, the first cover plate is provided with a main body part and four return pipes which are connected with the main body part and communicated with the through holes, the main body part is provided with an inner side and an outer side which are opposite along the sliding direction, the return pipes are connected with the inner side and are respectively inserted into the non-load channels, and the outer side of the main body part is provided with two first rotating parts;

the second cover plates are respectively arranged on the outer sides of the first cover plates, the second cover plates are provided with an inner corresponding side and an outer corresponding side which are opposite along the sliding direction, the inner corresponding side is provided with two first rotating surfaces, the first rotating surfaces face the first rotating parts and jointly form the first rotating channels, the outer corresponding side is provided with two second rotating parts, and the number of the perforations on the second cover plates is four;

the open end cover is positioned at the first end, the open end cover is provided with a first side facing the second cover plate, the first side is provided with two second rotating surfaces facing the second rotating parts and jointly forming the second rotating channels, and the number of the through holes is four.

6. The roller linear slide of claim 5, wherein: defining the non-load channels as a first non-load channel, a second non-load channel, a third non-load channel and a fourth non-load channel, and defining the load channels as a first load channel, a second load channel, a third load channel and a fourth load channel;

defining the return pipes as a first return pipe, a second return pipe, a third return pipe and a fourth return pipe, wherein the first return pipe of the first cover plate positioned at the first end is inserted into the first non-load channel, the second return pipe is inserted into the second non-load channel, the third return pipe is inserted into the third non-load channel, the fourth return pipe is inserted into the fourth non-load channel, the first return pipe of the first cover plate positioned at the second end is inserted into the third non-load channel, the second return pipe is inserted into the fourth non-load channel, the third return pipe is inserted into the first non-load channel, and the fourth return pipe is inserted into the second non-load channel;

the number of the first rotary channels at the first end is two, one of the first rotary channels is communicated with the first non-load channel and the second load channel, the other of the first rotary channels is communicated with the fourth non-load channel and the third load channel, the number of the first rotary channels at the second end is two, one of the first rotary channels is communicated with the second non-load channel and the first load channel, and the other of the first rotary channels is communicated with the third non-load channel and the fourth load channel;

the number of the second rotary channels is two, one of the second rotary channels is communicated with the second non-load channel and the first load channel, and the other second rotary channel is communicated with the third non-load channel and the fourth load channel.

7. The roller linear slide of claim 5, wherein: the first rotating surfaces and the first rotating parts extend along a first rotating direction, the second rotating surfaces and the second rotating parts extend along a second rotating direction, and the first rotating direction is perpendicular to the second rotating direction.

8. The roller linear slide of claim 5, wherein: the outer end cover is provided with four shielding parts, the shielding parts respectively seal the through hole, the shielding parts extend along the sliding direction, the shielding parts are respectively divided into two first shielding parts and two second shielding parts, the length of the first shielding parts along the sliding direction is larger than that of the second shielding parts along the sliding direction, the shielding parts are provided with a guide surface, the guide surfaces are cambered surfaces and are used for guiding the rolling parts to rotate, the guide surfaces of the first shielding parts are first guide surfaces, the guide surfaces of the second shielding parts are second guide surfaces, the first guide surfaces are side walls of the first rotating channel, and the second guide surfaces are side walls of the second rotating channel.

9. The roller linear slide of claim 5, wherein: the closed end cover is positioned at the second end, the closed end cover is provided with a closed inner side facing the second cover plate, the closed inner side is provided with two curved parts and two closed convex parts, the Qu Bumian pairs of the second rotary parts form two third rotary channels together, one third rotary channel is communicated with the first non-load channel and the second load channel, the other third rotary channel is communicated with the fourth non-load channel and the third load channel, and the closed convex parts are used for sealing the through holes.

10. The roller linear slide of claim 8, wherein: the open end cover is provided with a second side opposite to the first side, the second side is provided with a containing groove, a connecting part is connected between the two shielding parts and the other two shielding parts, and the connecting part is contained in the containing groove.