CN211343915U - Dustproof device and ball screw using same - Google Patents
Dustproof device and ball screw using same Download PDFInfo
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- CN211343915U CN211343915U CN201922308048.XU CN201922308048U CN211343915U CN 211343915 U CN211343915 U CN 211343915U CN 201922308048 U CN201922308048 U CN 201922308048U CN 211343915 U CN211343915 U CN 211343915U
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- annular body
- dust
- clamping convex
- convex parts
- dustproof
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Abstract
The utility model relates to a dust keeper for ball screw, it includes a first dustproof piece and a second dustproof piece. The first dustproof piece is provided with a first annular body, a plurality of first clamping convex parts are convexly extended out of the outer end face of the first annular body, a chip groove is formed between every two adjacent first clamping convex parts, the second dustproof piece is provided with a second annular body, a dustproof lip part is convexly extended out of the inner annular face of the second annular body, a plurality of second clamping convex parts are convexly extended out of the outer annular face of the second annular body, the second clamping convex parts of the second dustproof piece are embedded and clamped in the chip grooves of the first dustproof piece in a one-to-one mode, and the effect of forcing and fixing is achieved by utilizing an elastic ring. Thereby, the utility model discloses a dust keeper can promote dustproof performance under the condition that does not influence the operation stroke. Furthermore, the utility model also provides an use aforementioned dust keeper's ball screw.
Description
Technical Field
The present invention relates to a ball screw, and more particularly to a dust-proof device and a ball screw using the same.
Background
During the operation of the ball screw, chips of the workpiece or dust in the working environment are easily attached to the surface of the screw, and then along with the rotation of the screw and the movement of the nut, the attachments reach the balls through the gap between the screw and the nut, so that the actions of the balls are interfered, the abrasion of the balls is increased, and the service life and the precision of the ball screw are finally influenced.
In order to solve the problem of clearance, two ends of a traditional nut cap are respectively provided with a wiper which is provided with a lip part accommodated in an external thread groove of a screw rod, and when the screw rod rotates, attachments in the external thread groove are scraped through the lip part of the wiper. However, after practical use, the aforementioned scraper has limited dust-proof capability and is not suitable for more severe working environment (such as high dust). In order to further improve the dust-proof capability, the related patent documents such as TWI568956 and US8096201 are assembled by stacking a plurality of dust-proof fittings in an axial direction, but this not only increases the difficulty of assembly, but also lengthens the nut, which affects the operation stroke.
SUMMERY OF THE UTILITY MODEL
A primary object of the present invention is to provide a dust-proof device for a ball screw, which can improve the dust-proof performance without affecting the operation stroke of the ball screw.
In order to achieve the above objective, the present invention provides a dust-proof device, which comprises a first dust-proof member, a second dust-proof member, and an elastic ring. The first dust-proof part is provided with a first annular body and a plurality of first clamping convex parts, the first clamping convex parts are arranged on the first annular body in an equally-spaced annular arrangement mode, so that a chip groove is formed between every two adjacent first clamping convex parts, and in addition, the peripheral surface of each first clamping convex part is provided with a groove; the second dustproof piece is provided with a second annular body, a dustproof lip and a plurality of second clamping convex parts, the second annular body is abutted against the first annular body, the outer annular surface of the second annular body is abutted against the inner circumferential surfaces of the first clamping convex parts of the first dustproof piece, the dustproof lip is arranged on the inner annular surface of the second annular body, the second clamping convex parts are arranged on the outer annular surface of the first annular body in an equally-spaced annular arrangement mode, and the second clamping convex parts of the second dustproof piece are embedded in the chip grooves of the first dustproof piece in a one-to-one mode; the elastic ring is arranged in the grooves of the first clamping parts of the first dustproof piece and abuts against the second clamping convex parts of the second dustproof piece so as to provide elasticity for fixing the first dustproof piece and the second dustproof piece together.
Therefore, the utility model discloses a collocation (the outer anchor ring of this second ring body supports the inner peripheral surface that leans on these first block convex parts in this first dust proof) of this first dust proof and this second dust proof is utilized to dust keeper to utilize this elastic ring to carry out the matched stack fixed, make the utility model discloses a dust keeper can promote dustproof performance under the condition that does not influence this ball screw's operation stroke.
Preferably, each of the second engaging protrusions of the second dust-proof member has an engaging groove for the elastic ring to be inserted and fixed. In addition, the distance between each clamping groove and the center of the second annular body is larger than the distance between each groove and the center of the first annular body, so that the elastic ring is prevented from falling off.
Preferably, the first annular body has a groove penetrating through the inner and outer end surfaces.
Preferably, the dust lip is arc-shaped.
Preferably, the dust lip has two inner and outer opposing inclined surfaces, the two inclined surfaces having the same inclination direction.
Preferably, the first engaging protrusions are rotationally symmetric with respect to the center of the first annular body, and the second engaging protrusions are rotationally symmetric with respect to the center of the second annular body.
In addition, the utility model also provides a ball screw using the dustproof device, which comprises a screw shaft, a screw cap which is arranged on the screw shaft in a displaceable way and a dustproof device which is arranged on one end surface of the screw cap; the dustproof device is provided with a first dustproof piece, a second dustproof piece and an elastic ring; the first dustproof piece is provided with a first annular body and a plurality of first clamping convex parts, the first clamping convex parts are arranged on the first annular body in an equally-spaced annular arrangement mode, so that a chip discharge groove is formed between every two adjacent first clamping convex parts, the first clamping convex parts abut against the end face of the nut, and the peripheral face of each first clamping convex part is provided with a groove; the second dustproof piece is provided with a second annular body, a dustproof lip and a plurality of second clamping convex parts, the second annular body is abutted against the first annular body, the outer annular surface of the second annular body is abutted against the inner circumferential surfaces of the first clamping convex parts of the first dustproof piece, the dustproof lip is arranged on the inner annular surface of the second annular body and contacts the screw shaft, the second clamping convex parts are arranged on the outer annular surface of the second annular body in an equally-spaced annular arrangement mode, and the second clamping convex parts of the second dustproof piece are embedded in the chip grooves of the first dustproof piece in a one-to-one mode; the elastic ring is arranged in the grooves of the first clamping parts of the first dustproof piece and abuts against the second clamping convex parts of the second dustproof piece.
The detailed structure, features, assembly or use of the dust-proof device for a ball screw according to the present invention will be described in the following detailed description of the preferred embodiments. However, it should be understood by those skilled in the art that the detailed description and specific examples, while indicating the specific embodiment of the invention, are intended for purposes of illustration only and are not intended to limit the scope of the invention.
Drawings
Fig. 1 is a perspective view of the ball screw to which the dust-proof device according to embodiment 1 of the present invention is applied.
Fig. 2 is a perspective view of a dust-proof device according to embodiment 1 of the present invention.
Fig. 3 is an exploded perspective view of the dustproof device according to embodiment 1 of the present invention.
Fig. 4 is a sectional view of a second dust-proof member provided in the dust-proof device according to embodiment 1 of the present invention.
Fig. 5 is a partially enlarged sectional view showing the use of the dust-proof device according to embodiment 1 of the present invention in cooperation with a ball screw.
Fig. 6 is an exploded perspective view of the dust-proof device according to embodiment 2 of the present invention.
Fig. 7 is a sectional view of a second dust-proof member provided in the dust-proof device according to embodiment 2 of the present invention.
Fig. 8 is a partially enlarged sectional view of the dust-proof device according to embodiment 2 of the present invention, which is used in cooperation with a ball screw.
[ legend of main assembly symbols in the drawings ] for the embodiments of the present disclosure
10 ball screw 12 screw shaft
14 nut 16 dust-proof device
20 first dust guard 22 first annular body
24 grooves 26 first engaging projections
28 groove 29 chip groove
30 second dust guard 32 second annular body
34 dust lip 36 second engaging projection
38 snap groove 40 elastic ring
50 second dust guard 52 dust lip
54 inclined plane
Detailed Description
Applicants first describe herein, throughout this specification, including the examples and claims that follow, directional terminology will be used with reference to the orientation of the figures. Next, in the embodiments and the drawings to be described below, the same element numbers denote the same or similar elements or structural features thereof.
Referring first to fig. 1, a ball screw 10 shown in fig. 1 includes a screw shaft 12 and a nut 14 movably disposed on the screw shaft 12. Referring to fig. 2 and 3, the dust-proof device 16 according to embodiment 1 of the present invention includes a first dust-proof member 20, a second dust-proof member 30, and an elastic ring 40. When the dust-proof device 16 is used in cooperation with the ball screw 10, the dust-proof device 16 according to embodiment 1 of the present invention is provided at each of both ends of the nut 14.
The first dust-proof member 20 is a one-piece structure made of an elastic material such as rubber or engineering plastic. The first dust-proof member 20 has a first annular body 22, the first annular body 22 has a groove 24 penetrating through the inner and outer end faces, and the groove 24 allows the first annular body 22 to be radially deformed so as to fit over the screw shaft 12. The first dust-proof component 20 further has a plurality of first engaging protrusions 26 (the number is not limited, eight are taken as an example here), the first engaging protrusions 26 are arranged on the outer end surface of the first annular body 22 in an equally spaced annular arrangement and are rotationally symmetric with respect to the center of the first annular body 22, so that a chip groove 29 is formed between two adjacent first engaging protrusions 26, and the first engaging protrusions 26 abut against the end surface of the nut 14. Further, the outer peripheral surface of each first engaging projection 26 has one recessed groove 28.
The second dust-proof member 30 is a one-piece structure made of an elastic material such as rubber or engineering plastic. The second dust-proof component 30 has a second annular body 32, the inner end surface of the second annular body 32 abuts against the outer end surface of the first annular body 22 of the first dust-proof component 20, and the outer annular surface of the second annular body 32 abuts against the inner peripheral surfaces of the first engaging protrusions 26 of the first dust-proof component 20. The second dust-proof member 30 further has a dust-proof lip 34, the dust-proof lip 34 is arc-shaped in this embodiment and protrudes from the inner annular surface of the second annular body 32, as shown in fig. 4 and 5, and the second dust-proof member 30 contacts the surface of the screw shaft 12 with the dust-proof lip 34 to scrape off foreign substances (such as dust or cutting chips of the work) attached to the surface of the screw shaft 12. The second dust-proof member 30 further has a plurality of second engaging protrusions 36 (the number is not limited, eight are taken as an example here), the second engaging protrusions 36 are arranged on the outer annular surface of the second annular body 32 at equal intervals in a ring shape and are rotationally symmetric with respect to the center of the second annular body 32, and the second engaging protrusions 36 of the second dust-proof member 30 are fitted into the chip grooves 29 of the first dust-proof member 20 in a one-to-one manner. In addition, the outer end surface of each second engaging portion 36 has an engaging groove 38, and the distance between each engaging groove 38 and the center of the second annular body 32 is greater than the distance between each concave groove 28 and the center of the first annular body 22, as shown in fig. 3 and 5.
The elastic ring 40 is made of an elastic material such as rubber or engineering plastic. As shown in fig. 5, the elastic ring 40 is disposed in the concave groove 28 of the first engaging protrusions 26 of the first dust-proof member 20 and is inserted into the engaging groove 38 of the second engaging protrusions 36 of the second dust-proof member 30, on one hand, provides an elastic force to the first engaging portions of the first dust-proof member 20, so that the first engaging protrusions 26 of the first dust-proof member 20 are tightly fixed to the screw shaft 12, and on the other hand, provides an elastic force to the second engaging portions 36 of the second dust-proof member 30, so that the second dust-proof member 30 is tightly fixed to the first dust-proof member 20. In addition, besides the elastic ring 40, the first dust-proof member 20 and the second dust-proof member 30 may be additionally fixed by using an adhesive.
Therefore, the utility model discloses a collocation of first dust keeper 20 and second dust keeper 30 is utilized to dust keeper 16, for example the outer anchor ring of second ring body 32 supports the inner peripheral surface that leans on these first block convex part 26 in first dust keeper 20, can improve the shortcoming that background art produced when with the axial stack with a plurality of dustproof accessories to utilize elastic ring 40 to compel tight fixed to the two, make the utility model discloses a dust keeper 16 can promote dustproof performance under the condition that does not influence ball screw 10's operation stroke, also replaces very easily if there is the structure to take place to damage, with the convenience that increases in the use.
It should be added here that the configuration of the dust lip can be varied in different ways. As shown in fig. 6 to 8, in the embodiment of the present invention 2, the dust lip 52 of the second dust-proof member 50 has two inner and outer opposite inclined surfaces 54, and the inner and outer inclined surfaces 54 have the same inclination direction, so that the contact area between the dust lip 52 and the screw shaft 12 can be increased, and the dust-proof effect can be further improved.
Claims (8)
1. A dust keeper for a ball screw, comprising:
the first dustproof piece is provided with a first annular body and a plurality of first clamping convex parts, the first clamping convex parts are arranged on the first annular body in an equally-spaced annular arrangement mode, so that a chip groove is formed between every two adjacent first clamping convex parts, and the peripheral surface of each first clamping convex part is provided with a groove;
the second dustproof piece is provided with a second annular body, a dustproof lip and a plurality of second clamping convex parts, the second annular body is abutted against the first annular body, the outer annular surface of the second annular body is abutted against the inner circumferential surfaces of the first clamping convex parts of the first dustproof piece, the dustproof lip is arranged on the inner annular surface of the second annular body, the second clamping convex parts are arranged on the outer annular surface of the second annular body in an equally-spaced annular arrangement mode, and the second clamping convex parts of the second dustproof piece are embedded in the chip removal grooves of the first dustproof piece in a one-to-one mode; and
and the elastic ring is arranged in the grooves of the first clamping parts of the first dustproof piece and abuts against the second clamping convex parts of the second dustproof piece.
2. The dust-proof device for a ball screw according to claim 1, wherein each of the second engaging protrusions of the second dust-proof member has an engaging groove, and a part of the elastic ring is fitted in the engaging grooves.
3. The dust-proof device for a ball screw according to claim 1 or 2, wherein a distance between each of the engaging grooves and a center of the second annular body is larger than a distance between each of the grooves and a center of the first annular body.
4. The dust keeper of claim 1, wherein the first annular body has a groove extending through both the inner and outer end surfaces.
5. The dust keeper of claim 1, wherein the dust lip is arcuate.
6. The dust prevention device for a ball screw of claim 1, wherein the dust lip portion has two inner and outer opposite inclined surfaces having the same inclination direction.
7. The dust-proof device for a ball screw according to claim 1, wherein the first engaging protrusions are rotationally symmetrical with respect to a center of the first annular body, and the second engaging protrusions are rotationally symmetrical with respect to a center of the second annular body.
8. A ball screw, comprising:
a screw shaft;
a nut displaceably provided on the screw shaft; and
a dust-proof device, set up in an terminal surface of this nut, this dust-proof device has:
the first dustproof piece is provided with a first annular body and a plurality of first clamping convex parts, the first clamping convex parts are arranged on the first annular body in an equally-spaced annular arrangement mode, so that a chip groove is formed between every two adjacent first clamping convex parts, the first clamping convex parts abut against the end face of the nut, and the peripheral surface of each first clamping convex part is provided with a groove;
the second dustproof piece is provided with a second annular body, a dustproof lip and a plurality of second clamping convex parts, the second annular body is abutted against the first annular body, the outer annular surface of the second annular body is abutted against the inner circumferential surfaces of the first clamping convex parts of the first dustproof piece, the dustproof lip is arranged on the inner annular surface of the second annular body and contacts with the screw shaft, the second clamping convex parts are arranged on the outer annular surface of the second annular body in an equally-spaced annular arrangement mode, and the second clamping convex parts of the second dustproof piece are embedded in the chip grooves of the first dustproof piece in a one-to-one mode; and
and the elastic ring is arranged in the grooves of the first clamping parts of the first dustproof piece and abuts against the second clamping convex parts of the second dustproof piece.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922308048.XU CN211343915U (en) | 2019-12-20 | 2019-12-20 | Dustproof device and ball screw using same |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922308048.XU CN211343915U (en) | 2019-12-20 | 2019-12-20 | Dustproof device and ball screw using same |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN211343915U true CN211343915U (en) | 2020-08-25 |
Family
ID=72097493
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201922308048.XU Active CN211343915U (en) | 2019-12-20 | 2019-12-20 | Dustproof device and ball screw using same |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN211343915U (en) |
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2019
- 2019-12-20 CN CN201922308048.XU patent/CN211343915U/en active Active
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