KR101751317B1

KR101751317B1 - Dustproof device for ball screw

Info

Publication number: KR101751317B1
Application number: KR1020150175611A
Authority: KR
Inventors: 홍-춘 텡; 스츄-웨이 유; 웨이-런 리우
Original assignee: 하이윈 테크놀로지스 코포레이션
Priority date: 2015-12-10
Filing date: 2015-12-10
Publication date: 2017-06-27
Also published as: KR20170068756A

Abstract

A preventive element applied to a ball screw, wherein the ball screw includes a set of nuts installed on the screw and the screw, the dustproof element includes a ring-shaped body and an elastic valve seat, and the ring- And an abrasive dust outlet is provided on the outer surface of the ring-shaped body, one end of the abrasive dust outlet communicates with a spiral channel formed between the screw and the nut, and the elastic valve seat is connected to the abrasive dust outlet And is installed at the other end. Therefore, when the fluid thrusts the elastic valve seat, the resilient valve seat is pushed open so that the abrasive dust outlet is opened. At this time, the abrasive dust is discharged smoothly from the abrasive dust outlet together with the fluid, .

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a dust-

The present invention relates to a ball screw, and more particularly to a vibration damping element for a ball screw.

In the process of using the ball screw, abrasive dust is generated by rolling contact between the screw, the nut and the ball, and when the abrasive dust remaining in the inside is not removed, the power transmission accuracy of the ball screw, And thus shortening the life time of the ball screw is accelerated.

In the prior art, for example, US Pat. No. 5,231,888 sucks abrasive dust generated internally by a suction device. However, inhalation devices make the overall configuration more complex and increase installation costs. Further, Japanese Patent JP 4,967,809 increases the adhesion between the lips of the dustproof element and the screw by the magnet, but rather the abrasive dust is easily sucked into the screw groove of the screw and accumulated. Therefore, although the sealing effect is improved by installing the magnets, the operating resistance of the entire structure indirectly increases.

SUMMARY OF THE INVENTION The primary object of the present invention is to provide a vibration damping element for a ball screw, which is simple in structure, has an excellent sealing effect, effectively removes abrasive dust therein, and increases the service life of the ball screw.

To achieve the above object, the first type of vibration damping element provided in the present invention includes a ring-shaped body and an elastic valve seat. The ring-shaped main body is provided at one end of the nut and is provided with a screw through the inner surface of the ring-shaped main body. The inner surface of the ring-shaped main body is provided with a dustproof lip contacting the outer circumferential surface of the screw. At least one abrasive dust outlet communicating with a spiral channel formed between the screws, the elastic valve seat being connected to the ring-shaped body and located at the other end of the abrasive dust outlet of the ring-shaped body.

As can be seen from the above description, when the elastic valve seat receives the pressure of the fluid, the abrasive dust outlet is opened to discharge the abrasive dust from the abrasive dust outlet together with the fluid. When the pressure of the fluid is released, The valve seat closes the abrasive dust outlet by its elastic recovery force.

In the second type of vibration damping element provided in the present invention, an abrasive dust outlet is provided on a side surface remote from the nut, and the abrasive dust outlet communicates with the screw type channel by at least one fine hole. Thus, when a fluid reaches the dustproof element along the threaded channel, the pressure of the fluid opens the micropores so that the abrasive dust, together with the fluid, passes through the micropores and is discharged from the abrasive dust outlet, The micropores are restored to their original pore diameters.

Detailed configuration, characteristics, assembly or use method of the vibration damping element provided in the present invention will be described in detail in the following embodiments. However, it will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention as defined by the appended claims.

1 is a perspective view of Embodiment 1 of the present invention.
FIG. 2 is a perspective view of the ball screw used in Example 1 of the present invention. FIG.
Fig. 3 is a cross-sectional view of the first embodiment of the present invention when the ball screw is used in combination, and mainly shows a state in which the dust discharge outlet is closed.
Fig. 4 is a cross-sectional view of the first embodiment of the present invention when the ball screw is used in combination, and mainly shows a state in which the dust discharge outlet is open.
5 is a perspective view of Embodiment 2 of the present invention.
Fig. 6 is a perspective view showing a combination of a nut and a nut according to a second embodiment of the present invention.
FIG. 7 is a cross-sectional view of the second embodiment of the present invention when the nut is used in combination, and mainly shows a state in which the dust discharge outlet is closed.
FIG. 8 is a cross-sectional view of the second embodiment of the present invention when a nut is used in combination, and mainly shows a state in which a dust discharge outlet is opened.
9 is a perspective view of Embodiment 3 of the present invention.
10 is a front view of Embodiment 3 of the present invention.
11 is a cross-sectional view of a third embodiment of the present invention in combination with a ball screw.
12 is a perspective view of Embodiment 4 of the present invention.
13 is a front view of a fourth embodiment of the present invention.
Fig. 14 is a cross-sectional view of the fourth embodiment of the present invention when a ball screw is used in combination. Fig.

Referring to Figures 2 and 3, the ball screw 10 shown in the figure is mounted between a screw 12 and a set of nuts 14 provided on the screw 12 and a screw 12 and a nut 14 An outer threaded groove 122 is provided on the outer circumferential surface of the screw 12 and an inner threaded groove 142 is formed on the inner circumferential surface of the nut 14, The external threaded grooves 122 and the internal threaded grooves 142 of the nut 14 correspond to each other to form the helical channels 16 in common so that the balls are allowed to circulate along the helical channel 16. [ Referring again to Fig. 1, the vibration-proofing device 18 of the present invention includes a ring-shaped main body 20 and three resilient valve sheets 30.

The ring-shaped main body 20 is provided with two opposing positioning flanges 21 on its outer surface, two inner ring-shaped main bodies 20 are provided with two opposing anti-vibration ribs 22, The screw 12 is inserted into the positioning concave groove 144 of the inner circumferential surface of the nut 14 by the positioning flange 21 and is inserted into the positioning concave groove 144 of the ring- 20 are brought into contact with the outer circumferential surface of the screw 12, thereby preventing foreign matter from entering the inside of the nut 14, thereby providing a sealing effect. The abrasive dust outlet 23 is provided on the outer surface of the ring-shaped main body 20 at three equally spaced apart abrasive dust outlets 23, which extend toward the one end of the nut 14, Communicate.

The elastic valve seat 30 is located at one end spaced from the nut 14 at the abrasive dust outlet 23 of the ring-shaped main body 20. In the present embodiment, the inner circumferential surface of the nut 14 is provided with positioning recessed grooves The resilient valve seat 30 is located inside the valve seat groove 146 of the nut 14 and one end of the resilient valve seat 30 is connected to the ring- (20) to seal the abrasive dust outlet (23).

As can be seen from the above description, when a fluid (e.g., oil) is injected into the nut 14, the helical channel 16 directs the abrasive dust to the abrasive dust outlet 23, The elastic valve seat 30 receives the pressure of the fluid and opens the abrasive dust outlet 23 (as shown in Fig. 4), and the abrasive dust is discharged from the fluid The fluid is released from the abrasive dust outlet 23 and the fluid stops the thrust against the elastic valve seat 30. At this time, the resilient valve seat 30, due to its elastic recovery force, The outlet 23 is closed (as shown in Fig. 3).

5, one end of the elastic valve seat 44 is connected to the inner surface of the ring-shaped body 42 and the other end of the elastic valve seat 44 And the other end extends in the direction away from the anti-vibration lip 46 and contacts the end face of the nut 14. [ 7 and 8, the resilient valve seat 44 opens the abrasive dust outlet 48 even when subjected to fluid pressure so that the abrasive dust is discharged from the abrasive dust outlet 48 together with the fluid And after releasing the pressure of the fluid, the elastic valve seat 44 closes the abrasive dust outlet 48 by its elastic recovery force.

In addition, the vibration damping element is not necessarily designed as an elastic valve seat. 9 and 10, in the third embodiment of the present invention, the anti-vibration element 50 is made of an elastic material such as rubber, and on the side surface of the anti-vibration element 50 remote from the nut 14 Three equally distributed worn-out dust outlets 52 are provided and each worn out dust outlet 52 communicates with the helical channel 16 by four circular micro-holes 54. Thus, as shown in Fig. 11, after the fluid has reached the dustproof element 50 along the spiral channel 16, the pressure of the fluid opens all the circular micropores 54 so that the abrasive dust, The diameter of the circular micropores 54 is allowed to flow through the circular micropores 54 and discharged from the abrasive dust outlet 52. When the pressure of the fluid is released, the hole walls of the circular micropores 54 are elastic materials, The circular micropore 54 is restored to its original pore diameter. With the same principle, the micro holes 64 of the dustproof element 60 are not necessarily formed in the form of a plurality of circular holes, or may be designed in the shape of a single cross-shaped hole. As shown in Figs. 12-14, when the pressure of the fluid is applied, the cruciform micropores 64 are opened, the abrasive dust is discharged from the abrasive dust outlet 62, and when the fluid pressure is released, 64) is restored to the original pore diameter size.

In addition, when comparing the dustproof element of the present invention with the conventional art, it is possible to provide the same excellent sealing effect as well as a relatively simple structure, effectively discharging the abrasive dust therein, .

10: Ball Screw
12: Screw
122: External thread groove
14: Nut
142: Internal thread groove
144: Positioning recessed groove
146: Valve seat groove
16: Spiral channel
18:
20: ring-shaped body
21: Positioning flange
22: Antivibration Lip
23: abrasive dust outlet
30: Elastic valve seat
40:
42: ring body
44: Elastic valve seat
46: Antivibration Lip
48: abrasive outlet
50:
52: abrasive dust outlet
54: fine holes
60: anti-vibration element
62: abrasive dust outlet
64: microball

Claims

A vibration damping element for a ball screw,
Wherein the ball screw includes a screw and a set of nuts provided on the screw, an outer helical groove is provided on an outer circumferential surface of the screw, an inner helical groove is provided on an inner circumferential surface of the nut, Wherein the internal spiral grooves of the nut correspond to each other to form a helical channel in common,
The vibration-
And a ring having one end connected to the spiral channel and having at least one abrasive dust outlet connected to the outer surface of the screw, A shape body; And
At least one resilient valve seat connected to the ring-shaped body and positioned at the other end of the abrasive dust outlet of the ring-shaped body;
And a vibration damping element for a ball screw.

The method according to claim 1,
Wherein one end of the elastic valve seat is connected to an inner surface of the ring-shaped main body, and the other end of the elastic valve sheet extends in a direction away from the vibration-proof lip and contacts the nut.

The method according to claim 1,
And the elastic valve seat is located inside the valve seat groove of the nut and one end of the elastic valve seat is connected to the outer surface of the ring-shaped main body.

A vibration damping element for a ball screw,
Wherein the ball screw includes a screw and a set of nuts provided on the screw, an outer helical groove is provided on an outer circumferential surface of the screw, an inner helical groove is formed on an inner circumferential surface of the nut, The inner spiral grooves of the nut correspond to each other to form the helical channel in common,
Wherein the dustproof element is provided at one end of the nut and the screw is inserted through the dustproof element and the inner surface of the dustproof element is provided with a dustproof lip contacting the outer circumferential surface of the screw, Wherein the abrasive dust outlet is communicated with the helical channel through at least one of the micropores,
Wherein the vibration damping element is made of an elastic material,
Dustproof element for ball screw.

5. The method of claim 4,
Wherein the cross-sectional shape of the fine holes is circular.

5. The method of claim 4,
Wherein the cross-sectional shape of the fine holes is a cross shape.

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