KR200487409Y1 - Ball screw with a dust-proof and self-lubricating module - Google Patents

Abstract

Ball screws with vibration and self-lubricating modules basically include screws, nuts, dustproof and self-lubricating modules. The vibration and self-lubricating module includes a guide ring, a wiper, a solid lubricating unit, and a confinement ring. The wiper is positioned closer to the end face of the nut than the guide ring so that the wiper can perform the first vibration operation and the guide ring performs the second vibration operation to improve the vibration proof effect. Further, the guide ring can lubricate the screw by guiding the lubricant to the screw while performing the dustproof operation, so that the ball screw can improve the dustproof effect while certainly providing the self lubrication function.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a ball screw having a vibration and self-lubricating module,

The present invention relates to ball screws, in particular to ball screws having vibration and self-lubricating modules.

Taiwan Patent Application No. 099217662 discloses a method of making a wiper, an annular liner and a C-shaped retainer in such a manner that an annular liner contacts the first lateral edge of the wiper and the C- shaped retaining ring contacts the annular liner to limit the position of the annular liner and wiper. Discloses an "improved wiper for a ball screw" in which the ring is disposed together with the nut of the ball screw to achieve a vibration-proof function as a result. However, this application only has a dust-proofing function and does not have a lubrication function. Therefore, practicality is clearly insufficient. To obtain the lubrication function, a common practice is to add an additional lubricant vessel to the end face of the nut, but this will increase the length of the nut, while reducing the running length of the nut.

1, which is a drawing of one of the drawings describing the lubrication structure of the ball screw disclosed in Japanese Patent JPB-0003508402, the solid lubricating unit 11 is fixed to the nut 13 and the screw 14 And the solid lubricating unit 11 includes a lubricating portion 111 which is disposed in the outer spiral groove 141 of the screw 14. [ With the solid lubrication unit 11, the screw 14 can be directly lubricated, so that the ball 15 can smoothly circulate and remove stress. However, this invention has only a lubrication function without a strong anti-vibration function. The dustproof function may be achieved by the lubricating portion 111 disposed in the outer spiral groove 141 of the screw 14, but the lubricating portion 111 alone performs the single dustproofing, and the final dustproofing effect is certainly insufficient.

The present invention seeks to eliminate and / or mitigate the above-mentioned disadvantages.

One object of the present invention is to provide a ball screw having a vibration-proof and self-lubricating module capable of improving the dust-proofing effect while providing a self-lubricating function.

In order to achieve the above object, a ball screw having a vibration and self-lubricating module according to the present invention is a screw comprising a shaft, a screw including an external helical groove formed on an outer surface of the screw so as to surround the shaft, And an annular receiving groove formed in one of the two end faces of the nut and extending in the direction of the axis, the inner spiral groove being formed on one of the two end faces of the nut, the inner spiral groove being formed on the inner surface of the nut, And an outer spiral groove comprising a nut defining a load path for receiving a plurality of balls, wherein the vibration and self-lubricating module is inserted along the axis into the annular receiving groove and comprises a guide ring, a wiper, Ring.

The guide ring is sleeved on the screw and is disposed in the annular receiving groove of the nut and has a first annular guide surface for contacting the bottom surface of the annular receiving groove, a second annular guide surface opposed to the first annular guide surface, And an inner annular guide surface connected between the second annular guide surface and contacting the outer surface of the screw, and a guide protruding from the inner annular guide surface and contacting the outer helical groove.

The wiper is sleeved on the screw, is disposed in the annular receiving groove and has a first annular wiping surface for contacting the second annular guide surface, a second annular wiping surface opposite the first annular wiping surface, A lubrication groove recessed from the ping surface toward the second annular wiping surface, and a wiping portion for contacting the outer spiral groove.

The solid lubricating unit is made of a lubricating material and disposed in the lubricating groove such that it is in contact with the second annular guide surface of the guide ring so that the second annular guide surface can guide the lubricant to the guide and the outer spiral groove.

The limiting ring is sleeved on the screw, disposed in the annular receiving groove and in contact with the second annular wiping surface to prevent disengagement of the guide ring, wiper and solid lubricating unit from the annular receiving groove.

Preferably, the nut includes two annular receiving grooves each formed in two end faces of the nut and extending in the direction of the shaft. There are two anti-vibration and self-lubricating modules inserted along the axis into two annular receiving grooves.

Preferably, the vibration and self-lubricating module includes a washer which is sleeve-coupled onto the screw and is located between the bottom surface of the annular receiving groove and the first annular guide surface.

Preferably, the guide ring is made of felt or foam.

Preferably, a positioning recess is formed in the inner surface of the annular receiving groove, and the limiting ring is disposed in the positioning recess and contacts the second annular wiping surface of the wiper.

Preferably, the volume of the lubricant groove accounts for 9% to 43% of the total volume of the wiper.

Preferably, the retaining ring is a C-shaped ring.

The wiper is positioned closer to the end face of the nut than the guide ring so that the wiper can perform the first vibration operation and the guide ring performs the second vibration operation to improve the vibration proof effect. Further, the guide ring can lubricate the screw by guiding the lubricant to the screw while performing the dustproof operation, so that the ball screw can improve the dustproof effect while certainly providing the self lubrication function.

Together with various other novel features which characterize the invention, are pointed out with particularity in the claims annexed hereto and forming a part of the disclosure. For a better understanding of the present invention, its operating advantages and the particular objects attained by its uses, reference should be made to the accompanying drawings and description, in which preferred embodiments of the invention are shown.

According to the present invention, it is possible to provide a ball screw having a dustproof and self-lubricating module capable of improving the dustproof effect while providing a self-lubricating function.

1 is a view of one of the drawings describing a lubrication structure of a ball screw disclosed in Japanese Patent JPB-0003508402.
2 is an exploded view of a ball screw having a vibration and self-lubricating module according to a first preferred embodiment of the present invention;
3 is an assembly view of a ball screw having a vibration and self-lubricating module according to a first preferred embodiment of the present invention;
4 is a cross-sectional view of a ball screw having a vibration and self-lubricating module according to a first preferred embodiment of the present invention;
5 is an enlarged view of Fig.
6 is a cross-sectional view of a ball screw having an anti-vibration and self-lubricating module according to a second preferred embodiment of the present invention, showing that the anti-vibration and self-lubricating module is disposed on the other end face of the nut;
7 is a cross-sectional view of a ball screw having a vibration and self-lubricating module according to a third preferred embodiment of the present invention, showing that the vibration and self-lubricating module is disposed on two end faces of the nut.

BRIEF DESCRIPTION OF THE DRAWINGS The present invention will become more fully apparent from the following description, taken in conjunction with the accompanying drawings, which illustrate, by way of illustration only, a preferred embodiment of the invention.

Before a detailed description, it is important to note that, in the following description, similar elements are denoted by the same numerals.

2 to 5, a ball screw having a vibration and self-lubricating module A according to the first preferred embodiment of the present invention is basically composed of a screw 21, a nut 23, a dustproof module 25, Vibration and self-lubricating module (A).

The screw 21 includes an outer helical groove 212 formed on the outer surface of the screw 21 so as to enclose the shaft 211 and the shaft 211.

The nut 23 is inserted along the shaft 211 onto the screw 21 and has an inner spiral groove 231 formed on the inner surface of the nut 23 so as to surround the shaft 211, And two annular receiving grooves 232, 233 respectively formed on the two end faces of the shaft 211 and extending in the direction of the shaft 211. The inner spiral groove 231 and the outer spiral groove 212 define a load path for accommodating a plurality of balls 27. In this embodiment, the positioning recess 234 is formed in the inner surfaces 232A and 233A of the annular receiving grooves 232 and 233, respectively.

The vibration damping module 25 is disposed in the annular receiving groove 232 adjacent to the flange-shaped end 235 of the nut 24 and includes an annular liner 251, a wiper 252, Shaped ring 253 that is disposed in sequence on the first ring-shaped ring 232.

The method of assembling the screw 21, the nut 23 and the dustproof module 25 is known and the operation thereof is the same as that of the prior art and is not the core of the present invention. (Hereinafter referred to as the dustproof module 23 and the dustproof module 25) is assembled and operated is omitted.

The vibration and self-lubricating module A is inserted into the annular receiving groove 233 along the shaft 211 and is inserted into the annular receiving groove 233 through the washer 30, the guide ring 40, the wiper 50, the solid lubricating unit 60, Ring 70 as shown in FIG.

The washer 30 is sleeve-engaged onto the screw 21 and is brought into contact with the bottom surface 233B of the annular receiving groove 233.

The guide ring 40 is sleeved on the screw 21 and is disposed in the annular receiving groove 233 of the nut and has a first annular guide surface 41 for leaning against the lateral surface of the washer 30, A second annular guide surface 42 facing the annular guide surface 41 and an inner annular guide surface 42 connected between the first and second annular guide surfaces 41 and 42 and in contact with the outer surface 213 of the screw 21 43 and a guide portion 44 protruding from the inner annular guide surface 43 and contacting the outer helical groove 212. In this embodiment, the guide ring 40 is felt but not limited thereto, and may be a porous object such as a foam.

The wiper 50 is sleeved on the screw 21 and is disposed in the annular receiving groove 233 and includes a first annular wiping surface 51 for contacting the second annular guide surface 42, A second annular wiping surface 52 opposed to the ping surface 51 and a lubrication groove 53 recessed from the first annular wiping surface 51 toward the second annular wiping surface 52 and an outer annular wiping surface 52, And a wiping portion 54 for contacting the wiping portion 54.

The solid lubricating unit 60 is made of a lubricating material and disposed in the lubricating groove 53 to come into contact with the second annular guide surface 42 of the guide ring 40 so that the second annular guide surface 42 guides the lubricant And guide the guide portion of the ring 40 and the outer spiral groove 212 of the screw 21. In this embodiment, the limiting ring 70 is a C-shaped retaining ring disposed in the positioning recess 234 and in contact with the second annular wiping surface 52 of the wiper 50.

The above is the main constituent elements of the first embodiment, and the present invention operation and function are described as follows.

The vibration and self-lubrication module A is inserted along the shaft 211 into the annular receiving groove 233 of the nut 23 and the guide ring 40 of the vibration and self-lubricating module A and the wiper 50, Are sequentially disposed in the annular receiving groove 233. [ The wiper 50 is located closer to the end face of the nut 23 than the guide ring 40 and as a result the wiper 50 blocks the dust or iron powder having a relatively large diameter, The dust or iron powder having a relatively large diameter can be prevented from damaging the guide ring 40 made of felt. Further, the guide ring 40 can block dust having a smaller diameter. In particular, by the inner annular guide surface 43 of the guide ring 40 contacting the outer surface 213 of the screw 21 and the guide 44 contacting the outer spiral groove 212 of the screw 21 , The micro dust particles can be prevented from passing through the guide ring 40 and adhering to the balls 27, so that the second dustproof operation is performed by the guide ring 40. Therefore, the vibration and self-lubricating module (A) of the present invention provides double anti-vibration protection, and the anti-vibration effect can be surely improved.

The solid lubricating unit 60 made of a lubricating material is provided in the lubrication groove 53 and the wiper 50 of the guide ring 40 is formed in the lubrication groove 53, The annular guide surface 42 causes the lubricant material to be guided by the guide ring 40 to the outer spiral groove 212 and the guide portion 44 of the screw 21 to lubricate the screw 21, Thereby making the balls 27 circulate more smoothly and eliminate stress. Thus, the guide ring 40 can guide the lubricant material to the screw 21 to lubricate the screw while performing the dust-proofing operation, so that the present invention provides a self-lubricating function, .

It should be noted that the lubrication groove 53 of the wiper 50 may be a single groove formed in a ring shape and may also be formed of a plurality of arc-shaped grooves. The volume of the lubricating groove 53 occupies 9% to 43% of the entire volume of the wiper 50 regardless of the number of the lubricating grooves 53. [ When the volume of the lubricating groove 53 is less than 9% of the total volume of the wiper 50, the lubrication life of the lubricating oil contained therein is less than two years. When the volume of the lubricating groove 53 is larger than 43% of the total volume of the wiper 50, the wiper 50 is formed poorly to produce a non-standardized product.

6, a ball screw having a vibration and self-lubricating module A according to a second preferred embodiment of the present invention basically comprises a screw 21, a vibration damping module 25, a vibration and self-lubricating module A). The vibration and self-lubricating module A also includes a washer 30, a guide ring 40, a wiper 50, a solid lubricating unit 60 and a confinement ring 70. Since the second embodiment is assembled and operated in the same manner as the first embodiment, no further explanation is provided. The difference between the second embodiment and the first embodiment will be described below.

The vibration and self-lubricating module A is disposed in the annular receiving groove 232 adjacent the flanged end 235 of the nut 23 while the dustproof module 25 is disposed in the flanged end 235 of the nut 23, In the annular receiving groove 233, which is located far away from the annular receiving groove 233, which forms another embodiment.

Referring to FIG. 7, a ball screw having a vibration and self-lubricating module A according to a third preferred embodiment of the present invention basically comprises a screw 21, a nut 23, a vibration and self- ). The vibration and self-lubricating module A also includes a washer 30, a guide ring 40, a wiper 50, a solid lubricating unit 60 and a confinement ring 70. Since the third embodiment is assembled and operated in the same manner as the first embodiment, no further explanation is provided. Differences between the third embodiment and the first embodiment will be described below.

Two annular receiving grooves 232 and 233 are formed in the two end faces of the nut 23 and extend in the direction of the shaft 211, respectively. There are two anti-vibration and self-lubricating modules A which are inserted into the two annular receiving grooves 232, 233 along the axis 211, which not only improves the anti-vibration effect but also improves the lubrication function.

While various embodiments of the present invention have been shown and described, it will be apparent to those skilled in the art that there may be additional embodiments within the scope of the present invention.

A: Anti-vibration and self-lubricating module 21: Screw
23, 24: nut 25: dustproof module
27: Ball 30: Washer
40: guide ring 41: first annular guide surface
42: second annular guide surface 43: inner annular guide surface
44: guide portion 50: wiper
51: first annular wiping surface 52: second annular wiping surface
53: lubrication groove 54: wiping part
60: solid lubricating unit 70: proposal ring
211: Axis 212: External spiral groove
213: outer surface 231: inner spiral groove
232, 233: annular receiving groove 232A, 233A: inner surface
233B: Bottom face 234: Positioning recess
235: flanged end 251: annular liner
252: wiper 253: C-shaped ring

Claims (3)

A ball screw having a vibration and self-lubricating module (A)
A screw (21) comprising a shaft (211) and an outer helical groove (212) formed on the outer surface of the screw (21) to surround the shaft (211)
A nut 23 which is inserted into the screw 21 along the shaft 211 and has an inner spiral groove 231 formed on the inner surface of the nut 23 so as to surround the shaft 211, And an annular receiving groove (232, 233) formed in one of the two end faces of the nut (23) and extending in the direction of the shaft (211), wherein the inner spiral groove (231) and the outer spiral groove (212) includes a nut (23) defining a load path for receiving a plurality of balls (27)
The vibration and self-lubricating module A is inserted into the annular receiving groove 233 along the shaft 211 and is inserted into the guide ring 40, the wiper 50, the solid lubricating unit 60, 70,
The guide ring 40 is sleeved on the screw 21 and is disposed in the annular receiving groove 233 of the nut 23 and contacts the bottom surface 233B of the annular receiving groove 233 A second annular guide surface 42 facing the first annular guide surface 41 and a second annular guide surface 42 connected between the first and second annular guide surfaces 41 and 42, An inner annular guiding surface 43 contacting the outer surface 213 of the outer annular guiding surface 43 and a guiding portion 44 projecting from the inner annular guiding surface 43 and contacting the outer spiral groove 212,
The wiper 50 is sleeved on the screw 21 and is disposed in the annular receiving groove 233 and has a first annular wiping surface 51 for contacting the second annular guide surface 42, A second annular wiping surface 52 facing the first annular wiping surface 51 and a lubricating groove 53 recessed from the first annular wiping surface 51 toward the second annular wiping surface 52, , And a wiping portion (54) for contacting the outer helical groove (212)
The solid lubricating unit 60 is disposed in the lubricating groove 53 so as to be made of a lubricating material and to be in contact with the second annular guide surface 42 of the guide ring 40, Can guide the lubricant to the guide (44) and the outer spiral groove (212)
The restriction ring 70 is sleeve-coupled onto the screw 21 and is disposed in the annular receiving groove 233 and contacts the second annular wiping surface 52 to define the guide ring 40, (50) and the solid lubricating unit (60) from being disengaged from the annular receiving groove (233). 3. The nut according to claim 1 wherein a positioning recess is formed in the inner surfaces of the annular receiving grooves of the nut and the limiting ring is positioned on the inner surface of the annular receiving groove, Is disposed in the recess (234) and contacts the second annular wiping surface (52) of the wiper (50). The ball screw of claim 1, wherein the volume of the lubricating groove (53) occupies 9% to 43% of the total volume of the wiper (50).

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