CN218817652U - Sealing structure, sliding body and linear guide rail - Google Patents

Abstract

The application relates to the field of linear motion devices, and particularly provides a sealing structure, a sliding body and a linear guide rail. The first sealing element is provided with a clamping part. The second sealing element is provided with a connecting part, the connecting part can be inserted into the clamping part along the third direction so as to limit the connecting part to move relative to the clamping part along the second direction, and a gap is formed between at least one side of the connecting part along the first direction and the side wall corresponding to the clamping part so that the connecting part can move along the first relative clamping part within a preset range. When the side surface of the sliding body is inclined relative to the first side surface, the first sealing piece can be inclined along with the side surface of the sliding body and is arranged on the side surface of the sliding body for preventing the lubricant in the sliding body from leaking. The second seal member is not limited to overlap with the first seal member, but is movable relative to the first seal member so that the second seal member can interfere with the slide rail to block foreign matter such as dust from entering the slide body.

Description

Sealing structure, sliding body and linear guide rail

Technical Field

The application relates to the field of linear motion devices, in particular to a sealing structure, a sliding body and a linear guide rail.

Background

The linear guide rail comprises a slide rail and a sliding body, and the sliding body is in sliding fit with the slide rail. Impurities such as dust enter the sliding body from a gap between the sliding rail and the sliding body to affect the sliding precision of the sliding body, and lubricating liquid of the sliding body leaks from the gap between the sliding body and the sliding rail to pollute the sliding rail. Therefore, the sliding body generally includes a sealing structure and a sliding block, and the sealing structure needs to be arranged on two sections of the sliding body so as to reduce dust entering the sliding body and lubricant leaking from the sliding body. When the end cover of the sliding body inclines relative to the X axis, the sealing structure also inclines relative to the Z axis, and at the moment, a gap is easily generated between the sealing structure and the sliding rail, so that impurities such as dust can enter the inside of the sliding body through the gap between the sealing structure and the sliding rail.

SUMMERY OF THE UTILITY MODEL

In view of the above, it is desirable to provide a sealing structure, a sliding body and a linear guide rail, which can effectively prevent impurities such as dust from entering the sliding body.

The embodiment of the application provides a sealing structure, is applied to the slider can slide along first direction, sealing structure includes first sealing member and second sealing member. The first sealing element is used for being connected with an end cover of the sliding block and provided with a clamping portion. The second sealing element is provided with a connecting part, the connecting part is matched with the clamping part to limit the connecting part to move relative to the clamping part along the second direction, the connecting part can be inserted into the clamping part along the third direction, and a gap is formed between the side wall of at least one side of the connecting part corresponding to the clamping part along the first direction, so that the connecting part can move relative to the clamping part along the first direction.

In the sealing structure of the above embodiment, the first sealing member and the second sealing member are movable in the first direction and the third direction relative to each other, the first sealing member and the second sealing member can be easily attached to the slider, and when the side surface of the slider is inclined relative to the first direction, the first sealing member can be inclined with the side surface of the slider and is provided to the end cap of the slider for preventing the lubricant in the slider from leaking. The second seal member is not limited to overlapping the first seal member, but is movable relative to the first seal member so that the second seal member can interfere with the slide rail to block foreign matter such as dust from entering the slide rail. Therefore, the first sealing element and the second sealing element have better sealing effect.

In at least one embodiment, the clamping portion includes a guide groove and a limiting groove, the guide groove and the limiting groove are communicated, and the length of the limiting groove along the second direction is greater than that of the guide groove. The connecting part comprises a first part and a second part which are connected, the first part is in sliding fit with the guide groove, the second part is positioned in the limiting groove, and a gap is formed between at least one side of the second part and the groove wall of the limiting groove along the first direction.

In the sealing structure of the above embodiment, when the second portion is located in the limiting groove, the second portion can relatively move in the limiting groove along the first direction, and the second portion cannot extend out of the limiting groove through the guide groove. The first sealing element and the second sealing element can move relatively in a first range and can be stably and initially connected.

In at least one embodiment, the thickness of the first portion in the second direction is less than the length of the second portion in the second direction.

In the sealing structure of the above embodiment, the thickness of the first portion in the second direction is smaller than the length of the second portion in the second direction, so that the first portion can be inserted into the stopper groove through the guide groove, while the second portion can move within the range of the stopper groove.

In at least one embodiment, a thickness of the first portion in the second direction cooperates with a length of the guide slot in the second direction to define a position of the first portion in the second direction.

In the seal structure of the above embodiment, the thickness of the first portion in the second direction is matched with the length of the guide groove in the second direction to define the position of the first portion in the second direction. Therefore, the two opposite sides of the second part along the second direction can be in contact with the groove wall corresponding to the limiting groove or not. The shape and size of the second part are more flexibly set.

In at least one embodiment, the first seal includes a first body and a first seal portion. The first main body is used for being connected with the sliding block, the clamping portion is located on the first main body, and the first main body is provided with a first limiting recess. The first sealing portion is arranged in the first limiting recess and provided with a first sealing lip portion, and the first sealing lip portion faces away from one side of the second sealing element.

In the sealing structure of the above embodiment, the first sealing portion is provided in the first stopper recess, and the relative position of the first sealing portion and the first main body can be defined. The first seal lip of the first seal portion faces the side away from the second seal member, and lubricant can be effectively prevented from leaking out of the sliding body from the sliding body.

In at least one embodiment, the second seal includes a second body and a second seal portion. The second main body is connected with the first sealing element, and the connecting part is positioned on the second main body; the second sealing portion is arranged on the second main body and is provided with a second sealing lip portion, the second sealing lip portion faces away from one side of the first sealing piece, and the second sealing lip portion is used for abutting against the sliding rail.

In the sealing structure of the above embodiment, the second sealing lip portion is abutted to the slide rail, so that dust can be prevented from entering the slide body from a gap between the slide rail and the slide body, and the dustproof effect of the slide body is favorably improved.

In at least one embodiment, the second main body part is provided with a second limiting recess, the second sealing part is located in the second limiting recess, and the second sealing element further comprises a retaining part which is connected with the second main body and is matched with the second main body part to clamp and fix the second sealing part.

In the sealing structure of the above embodiment, the second sealing portion is located in the second stopper recess, and the relative position of the second main body and the second sealing portion can be defined. The holding part is connected with the second main body, and the second sealing part is clamped and fixed by being matched with the second main body part, so that the stability of the second sealing part can be improved, and the second sealing part can stably prevent dust from entering the sliding body.

In at least one embodiment, the slider further comprises a fastener, the first sealing element penetrates through a first connecting hole along a first direction, the second sealing element penetrates through a second connecting hole along the first direction, and the fastener penetrates through the first connecting hole and the second connecting hole and is used for being connected with the slider.

In the sealing structure of the embodiment, the first sealing element and the second sealing element are tightly abutted against the sliding body through the fastening piece, so that the connection is simple and stable.

The embodiment of the application also provides a sliding body, and the sliding body includes slider and seal structure, seal structure set up in slider one end.

The embodiment of the application further provides a linear guide rail, which comprises a sliding rail and a sliding body, wherein the sliding body is in sliding fit with the sliding rail.

The sealing structure, the sliding body and the linear guide rail can enable the first sealing element and the second sealing element to move relatively through the matching of the clamping portion and the connecting portion, and therefore the relative positions of the first sealing element and the second sealing element can be adjusted according to the position of the sliding block and the position of the sliding rail. Make first sealing member can block the emollient leakage in the slider effectively, the second locating part can contradict the slide rail effectively to block inside the dust gets into the slider.

Drawings

Fig. 1 is a perspective view of a linear guide according to an embodiment of the present application.

FIG. 2 is an exploded view of the seal and slider of FIG. 1.

Figure 3 is a top view of the seal structure of figure 2.

Fig. 4 is a top view of another embodiment seal configuration of fig. 2.

Fig. 5 is a side view of a portion of the linear guide of the alternate embodiment of fig. 1.

Figure 6 is an exploded view of the sealing structure of figure 2.

Fig. 7 is a side cross-sectional view of a portion of the seal structure of fig. 1.

Description of the main elements

Seal structure 100

First seal 10

First body 11

First limit recess 111

First connection hole 112

First seal portion 12

First sealing lip 121

Retaining part 13

Guide groove 131

Limiting groove 132

Second seal 20

Second body 21

Second limiting recess 211

Second connection hole 212

Pressing through hole 2121

Sealing through-hole 2122

Second seal 22

Second sealing lip 221

Connecting part 23

First part 231

Second portion 232

Holding part 24

Fastener 30

Slider 200

End cap 201

Sliding rail 300

Linear guide 001

Sliding body 002

First direction X

Second direction Y

Third direction Z

Detailed Description

The technical solutions in the embodiments of the present application will be described below with reference to the drawings in the embodiments of the present application, and it should be apparent that the described embodiments are only one sub-embodiments of the present application, and not all embodiments.

It will be understood that when an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. When an element is referred to as being "on" another element, it can be directly on the other element or intervening elements may also be present. The terms "top," "bottom," "upper," "lower," "left," "right," "front," "rear," and the like as used herein are for illustrative purposes only.

When two elements (planes, lines) are arranged in parallel, it is to be understood that the relationship between the two elements includes both parallel and substantially parallel. By substantially parallel is understood that there may be an included angle between two elements, the included angle being greater than 0 ° and less than or equal to 10 °.

When two elements (planes, lines) are arranged vertically, it is understood that the relationship between the two elements includes both vertical and substantially vertical. By substantially perpendicular is understood that the angle between the two elements is greater than or equal to 80 ° and less than 90 °.

When a parameter is greater than, equal to, or less than an endpoint value, it is understood that the endpoint value allows a tolerance of ± 10%, e.g., a to B is greater than 10, which is understood to include the case where a to B is greater than 9, as well as the case where a to B is greater than 11.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used herein in the description of the present application is for the purpose of describing particular embodiments only and is not intended to be limiting of the application.

Some embodiments of this application provide a seal structure, are applied to linear guide, linear guide includes slide rail and slider, the slider with slide rail sliding fit, the slider can slide along first direction on the slide rail, the slider includes seal structure and slider, seal structure includes first sealing member and second sealing member. The first sealing element is used for being connected with an end cover of the sliding block and provided with a clamping portion. The second sealing element is provided with a connecting part, the connecting part is matched with the clamping part to limit the connecting part to move relative to the clamping part along the second direction, the connecting part can be inserted into the clamping part along the third direction, and a gap is formed between the side wall of at least one side of the connecting part corresponding to the clamping part along the first direction, so that the connecting part can move relative to the clamping part along the first direction.

In the sealing structure of the above embodiment, when the side surface of the slider is inclined with respect to the first direction, the first seal member may be inclined with the side surface of the slider and provided to the side surface of the slider for preventing the lubricant in the slider from leaking. The second seal member is not limited to overlapping the first seal member, but is movable relative to the first seal member so that the second seal member can interfere with the slide rail to block foreign matter such as dust from entering the slide rail. Therefore, the first sealing element and the second sealing element have better sealing effect.

In order to more clearly describe the technical solutions of the embodiments of the present application, a coordinate system is established in the figure, and the following description about each orientation of the linear guide rail is performed based on the coordinate system, the X-axis is a first direction, and the sliding body repeatedly slides along the first direction. The Y-axis is a second direction perpendicular to the first direction in a horizontal plane, the Z-axis is a third direction perpendicular to a plane formed by the first direction and the second direction, and the terms "above", "below", "upward" and "downward" in the description of the present application are relative to the third direction.

Some embodiments of the present application will be described below with reference to the accompanying drawings. The embodiments described below and the features of the embodiments can be combined with each other without conflict.

Referring to fig. 1, an embodiment of the present application provides a linear guide 001, where the linear guide 001 includes a sliding body 002 and a sliding rail 300. The slide rail 300 extends along the first direction X, and the sliding body 002 is slidably engaged with the slide rail 300, so that the sliding body 002 can slide along the first direction X in a reciprocating manner. The sliding body 002 includes two sealing structures 100 and two sliding blocks 200, the sealing structures 100 are spaced along the first direction X, and are disposed on the end caps 201 at two opposite ends of the sliding block 200. The sealing structure 100 is used to block foreign substances such as dust from entering the slider 200 from a gap between the slider 200 and the slide rail 300, and the sealing structure 100 is used to block lubricating liquid in the slider 200 from leaking out of the slider 200 from the gap between the slider 200 and the slide rail 300.

Referring to fig. 2, the sealing structure 100 includes a first sealing member 10 and a second sealing member 20. The first seal 10 is used in connection with the slider 200 for blocking leakage of lubricant inside the slider 200. The first sealing member 10 is provided with a catching portion 13 at a side away from the slider 200. Optionally, the blocking portion 13 is a through groove, and the blocking portion 13 penetrates through a side of the first sealing member 10 close to the second sealing member 20, and the blocking portion 13 penetrates through an upper end of the first sealing member 10 along the third direction Z. Optionally, the cross-sectional shape of the first seal 10 is substantially the same as the cross-sectional shape of the slider 200 to facilitate fitting to the slide rail 300.

The second sealing member 20 is used to interfere with the slide rail 300 to block dust from entering the slider 200. The second sealing member 20 has a connecting portion 23 on the side close to the first sealing member 10, and since the capture portion 13 penetrates the first sealing member 10, the connecting portion 23 can be inserted into the capture portion 13 in the third direction Z, and the second sealing member 20 can still be located on the side of the first sealing member 10. The connecting portion 23 is inserted into the positioning portion 13, and can restrict the movement of the connecting portion 23 relative to the positioning portion 13 along the second direction Y. And a gap S is formed between at least one side of the connecting portion 23 and a certain sidewall of the blocking portion 13 along the first direction X, so that the connecting portion 23 can relatively move along the first direction X within a preset range. Therefore, the first seal 10 is movable in the third direction Z and the first direction X relative to the second seal 20. The predetermined range is understood as the difference between the distance between two opposite side walls of the locking portion 13 corresponding to the connecting portion 23 and the distance between two opposite sides of the connecting portion 23 along the first direction X. For example, along the first direction X, when one side of the connecting portion 23 abuts against the side wall corresponding to the position-locking portion 13, the gap S formed between the other side of the connecting portion 23 and the side wall corresponding to the position-locking portion 13 is within a predetermined range.

Alternatively, the cross-sectional shape of the second seal 20 is substantially the same as the cross-sectional shape of the first seal 10.

The first and second sealing members can move in the first direction and the third direction relative to each other, so that the first and second sealing members can be conveniently mounted on the slider, and when the end cap 201 of the slider 200 is inclined relative to the first direction X (as shown in fig. 5), the first sealing member 10 can be inclined with the side surface of the slider 200 and is disposed on the side surface of the slider 200, so as to prevent the lubricant in the slider 200 from leaking. The second sealing member 20 does not overlap the first sealing member 10, but can move relative to the first sealing member 10 so that the second sealing member 20 can interfere with the slide rail 300 to block foreign substances such as dust from entering into the slider 200. For example, the first seal 10 has the same inclination as the second seal 20, but the first seal 10 is closer to the slide rail 300 than the second seal 20. The first sealing member 10 is inclined with respect to the second sealing member 20 so that the first sealing member 10 has a larger interference area with the sliding rail 300, and so on.

It can be understood that the sealing structure 100 of the present application is not limited to the structure in which the second sealing member 20 can stably collide by adjusting the relative positions of the first sealing member 10 and the second sealing member 20 when the side surface of the slider 200 is inclined. When the side surface of the slider 200 is vertically disposed, the relative position between the first sealing element 10 and the second sealing element 20 can also be adjusted, so that the first sealing element 10 can accurately block the lubricant leakage, and meanwhile, the second sealing element 20 can preferably abut against the sliding rail 300 to block dust from entering the slider 200.

It is understood that the depth of the detent portion 13 in the third direction Z is greater than the thickness of the connecting portion 23 in the third direction Z, so that the connecting portion 23 can move in the third direction Z relative to the detent portion 13.

Referring to fig. 3, the locking portion 13 includes a guide groove 131 and a limiting groove 132, the guide groove 131 penetrates through the upper end of the first sealing member 10 and the side close to the second sealing member 20, the limiting groove 132 is located on the side of the guide groove 131 far from the second sealing member 20, the limiting groove 132 is communicated with the guide groove 131, and the limiting groove 132 penetrates through the upper end of the first sealing member 10. The connecting portion 23 includes a first portion 231 and a second portion 232, and the first portion 231 and the second portion 232 are connected. The first portion 231 is slidably engaged with the guide groove 131, and the first portion 231 can be limited to move along the second direction Y by the guide groove 131. The second portion 232 is located in the limiting groove 132, and a gap S is formed between at least one side of the second portion 232 and a groove wall corresponding to the limiting groove 132 along the first direction X, so that the second portion 232 can move relative to the limiting groove 132 within a preset range. The predetermined range is defined as the sum of the distances from the opposite sides of the second portion 232 to the gap S of the groove wall of the corresponding limiting groove 132 along the first direction X.

The length L1 of the guide groove 131 is smaller than the length L2 of the limiting groove 132 along the second direction Y, so that the first portion 231 is located in the guide groove 131, and when the second portion 232 is located in the limiting groove 132, the second portion 232 can move relatively in the limiting groove 132 along the first direction X, and the second portion 232 cannot extend out of the limiting groove 132 through the guide groove 131. So that the first sealing member 10 and the second sealing member 20 can be stably primarily coupled.

The thickness L1 of the first portion 231 in the second direction Y is smaller than the length L2 of the second portion 232 in the second direction Y, so that the first portion 231 can be inserted into the stopper groove 132 through the guide groove 131, and the second portion 232 can move within the range of the stopper groove 132.

The thickness L1 of the first portion 231 in the second direction Y cooperates with the length L1 of the guide groove 131 in the second direction Y to define the position of the first portion 231 in the second direction Y. It is understood that two opposite sides of the second portion 232 along the second direction Y may or may not contact the corresponding groove walls of the limiting groove 132. The shape and size of the second portion 232 can be more flexibly set.

Optionally, in some embodiments, the guide groove 131 and the limiting groove 132 are both rectangular in shape, and form the blocking portion 13 in a T shape. The first portion 231 and the second portion 232 are also rectangular, and form a connecting portion 23 having a T-shape.

Referring to fig. 4, in other embodiments, the shape of the limiting groove 132 is circular, and the shape of the second portion 232 is also circular and smaller than the limiting groove 132, so that a gap S is formed between the second portion 232 and the groove wall of the limiting groove 132.

It is understood that the shape of the position-limiting groove 132 and the shape of the second portion 232 are not limited to be the same, but may be different, for example, the shape of the position-limiting groove 132 is circular, the shape of the second portion 232 is rectangular, and the like.

Optionally, in some embodiments, the sealing structure 100 further includes a fastener 30, the first sealing member 10 has a first connection hole 112 extending therethrough along the first direction X, and the second sealing member 20 has a second connection hole 212 extending therethrough along the first direction X. The fastener 30 can be inserted through the first connection hole 112 and the second connection hole 212 and connected to the slider 200.

The second connection hole 212 has a larger aperture than the first connection hole 112, and the first connection hole 112 and the second connection hole 212 each have a larger aperture than the diameter of the fastener 30. Therefore, when the first sealing element 10 and the second sealing element 20 are not overlapped, the fastener 30 can still penetrate through the first connecting hole 112 and the second connecting hole 212, and the situation that the fastener 30 cannot fix the sealing structure 100 to the sliding block 200 because the first sealing element 10 and the second sealing element 20 are not overlapped is reduced. Alternatively, the fasteners 30 are bolts.

Referring to fig. 6 and 7, alternatively, in some embodiments, the first sealing member 10 includes a first main body 11 and a first sealing portion 12, and the first main body 11 is connected to the slider 200. The engaging portion 13 and the first connecting hole 112 are located in the first body 11. First main part 11 is equipped with first spacing sunken 111 towards second sealing member 20 one side, and first sealing 12 sets up in first spacing sunken 111, and second sealing member 20 is located first main part 11 one side to cooperate with first main part 11, the fixed first sealing 12 of centre gripping. The first sealing portion 12 has a first sealing lip 121, and the first sealing lip 121 faces the slider 200 to block lubricant inside the slider 200 from leaking.

Optionally, in some embodiments, the second sealing element 20 includes a second main body 21 and a second sealing portion 22, the second main body 21 is connected to the first main body 11, the connecting portion 23 is located on the first main body 11, the second main body 21 is provided with a second limiting recess 211, and the second sealing portion 22 is disposed on the second limiting recess 211. The second sealing portion 22 has a second sealing lip 221, and the second sealing lip 221 faces a side away from the first sealing member 10 to interfere with the slide rail 300, thereby blocking dust from entering the slider 200.

Optionally, in some embodiments, the second sealing element 20 further includes a retaining portion 24, and the retaining portion 24 is connected to the second main body 21 and cooperates with the second main body 21 to clamp two opposite sides of the second sealing portion 22, such that the second sealing portion 22 is fixed in the second limiting recess 211.

The second connecting hole 212 includes a pressing through hole 2121 and a sealing through hole 2122, the pressing through hole 2121 is located in the holding portion 24, and the sealing through hole 2122 is located in the second body 21. The diameter of the pressing through-hole 2121 is the same as that of the sealing through-hole 2122.

As described above, in the embodiment of the present invention, the first seal 10 and the second seal 20 can be relatively moved by the engagement of the catching portion 13 and the connecting portion 23, and the relative positions of the first seal 10 and the second seal 20 can be adjusted according to the position of the slider 200 and the position of the slide rail 300. So that the first seal 10 can effectively block the lubricant inside the slider 200 from leaking and the second seal 20 can effectively abut against the slide rail 300 to block dust from entering the inside of the slider 200.

In addition, those skilled in the art should recognize that the above embodiments are provided for illustration only, and not for the purpose of limiting the invention, and that suitable modifications and variations of the above embodiments are possible within the spirit and scope of the disclosure.

Claims (10)

1. A sealing structure applied to a slider that is slidable in a first direction, the sealing structure comprising:

the first sealing element is used for being connected with an end cover of the sliding block and provided with a clamping part;

the second sealing element is provided with a connecting part, the connecting part is matched with the clamping part to limit the movement of the connecting part relative to the clamping part along the second direction, the connecting part can be inserted into the clamping part along the third direction, and a gap is formed between at least one side of the connecting part and the side wall corresponding to the clamping part along the first direction, so that the connecting part can move relative to the clamping part along the first direction.

2. The seal structure of claim 1, wherein the detent portion includes a guide groove and a limit groove, the guide groove and the limit groove are in communication, and the length of the limit groove in the second direction is greater than the length of the guide groove;

the connecting part comprises a first part and a second part which are connected, the first part is in sliding fit with the guide groove, the second part is positioned in the limiting groove, and a gap is formed between at least one side of the second part and the groove wall of the limiting groove along the first direction.

3. The seal structure of claim 2, wherein a thickness of the first portion in the second direction is less than a length of the second portion in the second direction.

4. The seal structure of claim 2, wherein a thickness of the first portion in the second direction cooperates with a length of the guide slot in the second direction to define a position of the first portion in the second direction.

5. The seal structure of claim 1, wherein the first seal comprises:

the first main body is used for being connected with the sliding block, the clamping part is positioned on the first main body, and the first main body is provided with a first limiting recess;

the first sealing part is arranged in the first limiting recess and provided with a first sealing lip, and the first sealing lip faces away from one side of the second sealing element.

6. The seal structure of claim 1, wherein the second seal comprises:

a second body coupled to the first seal, the coupling portion being located on the second body;

the second sealing portion is arranged on the second main body and provided with a second sealing lip portion, the second sealing lip portion faces away from one side of the first sealing piece, and the second sealing lip portion is used for abutting against the sliding rail.

7. The seal structure of claim 6, wherein the second body portion defines a second retention recess, the second seal portion being positioned in the second retention recess, the second seal member further including a retention portion coupled to the second body portion and cooperating with the second body portion to clampingly secure the second seal portion.

8. The sealing structure of claim 1, further comprising a fastening member, wherein the first sealing member is provided with a first connection hole penetrating through the first sealing member in the first direction, the second sealing member is provided with a second connection hole penetrating through the second sealing member in the first direction, and the fastening member is inserted through the first connection hole and the second connection hole and is adapted to be connected to the slider.

9. A slider comprising a slider, characterized in that the slider further comprises a sealing structure according to any one of claims 1 to 8, which sealing structure is provided at an end cap of the slider.

10. A linear guide comprising a slide rail, wherein the linear guide further comprises a slider body according to claim 9, the slider body being in sliding engagement with the slide rail.

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