TWI579472B - Dust-proof structure on the bottom of a slider - Google Patents

Description

Dustproof structure at the bottom of the slider

The invention relates to a dustproof structure, in particular to a dustproof structure at the bottom of a slider.

Generally, the linear slide rail system is provided with a plurality of balls, and since the balls are in line contact between the slider and the slide rail, the frictional resistance can be greatly reduced, and the linear slide rail can perform high-precision motion, and Such precision linear slides can be mounted on precision machinery such as semiconductor equipment, medical equipment, automation equipment and machine tools.

However, foreign matter such as dust or metal dust is usually present in the operating environment, and such foreign matter often damages the slider or the slide rail or affects machining accuracy. In order to prevent foreign matter such as dust or metal dust from entering the outer space between the slider and the slide rail, it is usually designed to fix a flat rubber on the bottom surface of the slider, and one side of the rubber and the side of the slide rail are elastic. Contact to achieve the effect of blocking foreign objects. Conventional anti-rubber dust pieces are disposed between the slide rail and the slider in a simple cover or joint manner. However, the joint strength of such a structure is poor and it is easy to fall off or the cover is incomplete.

Therefore, another dust-proof technique is also proposed in the prior art, in which a screw is inserted through the retaining piece and the dustproof piece and locked at the bottom end of the slider, and the dustproof piece is brought into contact with the outside of the sliding rail to achieve dustproof and sealing. The function of the oil, such as the structure disclosed in US Pat. No. 4,547,741, is such. However, in such a conventional structure, the retaining piece is only used to hold the dustproof sheet, usually outside the sliding rail. The side surface is still at a considerable distance, so that the dustproof sheet is only reliable to provide a function of blocking foreign matter, and the dustproof sheet is made of a soft material such as rubber, and is easily sharpened or hardened by, for example, iron filings or the like. When the foreign matter is broken, the gap is blocked, or the gap generated by the wear is added to the force deformation, so that foreign matter can enter between the slider and the slide rail to cause damage to the slider and the slide rail.

Therefore, it is necessary to provide a novel and progressive slider bottom dustproof structure to solve the above problems.

The main object of the present invention is to provide a dustproof structure at the bottom of the slider, which can effectively prevent foreign matter from entering between the slider and the slide rail, smooth sliding, avoid damage to the slider or the slide rail, avoid affecting the processing precision, and ensure the barrier member. Retention and positioning effect.

Another object of the present invention is to provide a dustproof structure for a double barrier member, which is provided by a relatively rigid support member (for example, metal) and a relatively soft barrier member (for example, rubber) for hard and large volume. The metal impurity can be firstly isolated by the relatively hard support member, and the other layer of the relatively soft barrier member can achieve the effect of double blocking external impurities, effectively avoiding the problem of excessive wear of the single rubber barrier in the past, and greatly improving the dustproof effect of the slider. .

To achieve the above object, the present invention provides a dustproof structure at the bottom of a slider. The slider is spanned on a slide rail having a side surface. The dustproof structure at the bottom of the slider includes a support member and a barrier member. The support member is coupled to the slider, the support member extending toward a side of the slide rail and having a barrier gap with the side surface. The barrier member is relatively softer than the support member, the barrier member is held between the support member and the slider, and the barrier member includes a contact with the slide rail The first lip of the side.

1‧‧‧ Slider

10‧‧‧ lower retainer

11‧‧‧ Insert

4a‧‧‧Blocks

4b‧‧‧Blocks

41‧‧‧First lip

2‧‧‧Slide rails

21‧‧‧ side

3‧‧‧Support components

3a‧‧‧Support components

31‧‧‧ slotting

31a‧‧‧ slotting

32‧‧‧Bevel

33‧‧‧"

4‧‧‧Resistance

42‧‧‧ recess

43‧‧‧ head

44‧‧‧ pins

44a‧‧‧ pins

45‧‧‧ inclined section

46‧‧‧Second lip

47‧‧‧Kneck

48‧‧‧ step convex

5‧‧‧Blocking the gap

1 is a perspective view of a first preferred embodiment of the present invention.

Figure 2 is an exploded view of a first preferred embodiment of the present invention.

Figure 3 is a partially exploded view of the first preferred embodiment of the present invention.

Figure 4 is a cross-sectional view showing a first preferred embodiment of the present invention.

Figure 5 is a partial cross-sectional view showing a first preferred embodiment of the present invention.

Figure 6 is a schematic view of a second preferred embodiment of the present invention.

Figure 7 is a schematic view of a third preferred embodiment of the present invention.

The following is a description of the possible embodiments of the present invention, and is not intended to limit the scope of the invention as claimed.

Referring to FIG. 1 to FIG. 5, a first preferred embodiment of the present invention is shown. The bottom dustproof structure of the slider of the present invention is disposed between a slider 1 and a slide rail 2, wherein the slider 1 is spanned. The slide rail 2 has a side surface 21, and the bottom dustproof structure of the slider includes a support member 3 and a barrier member 4.

Preferably, the lower holder 10 of the slider 1 is provided with at least one insertion portion 11. In the present embodiment, a plurality of the insertion portions 11 are disposed on one side of the bottom surface of the slider 1 facing the slide rail 2, and the insertion portions 11 are spaced apart along the longitudinal direction of the slide rail 2.

The support element 3 is slidably coupled to the slider 1 , the support element 3 extending toward the side 21 of the slide rail 2 and having a blocking gap 5 with the side surface 21 , the support element 3 being It is made of metal material or other material with high hardness and can be held, wherein the barrier slit 5 is preferably not more than 0.3 mm (preferably, according to the size of foreign matter that may be encountered in the working environment, For example, it can be set to 0.1, 0.2 or 0.25 mm, but not limited thereto. Thus, the supporting member 3 can further prevent, for example, iron filings or the like from entering between the slider 1 and the sliding rail 2, This ensures smooth slippage between the slider 1 and the slide rail 2, and prevents foreign matter from damaging the slider 1 or the slide rail 2, or affects machining accuracy. Specifically, the support member 3 includes at least one slot 31. In the present embodiment, the support member 3 includes a plurality of the slots 31 corresponding to the number of the insertion portions 11, and the support member 3 includes a face. The slope 32 of the bottom of the slider 1.

The barrier member 4 is relatively softer than the support member 3, and the barrier member 4 is held between the support member 3 and the slider 1. The barrier member 4 includes a contact with the side 21 of the slide rail 2 A lip 41. Preferably, the barrier member 4 is made of a rubber material or other elastic and wear-resistant material; however, only the first lip portion 41 may be made of a rubber material or other elastic and wear-resistant material. The remaining portion of the barrier member 4 is made of a relatively hard material to provide a better support effect of the first lip portion 41 and a better contact adhesion effect with the side surface 21 of the slide rail 2. In more detail, the barrier member 4 has a recess 42 facing away from the slider 1 and a head 43 provided with the first lip 41. The head 43 is in contact with the side 21 of the slide rail 2. And the thickness is greater than the thickness of the recess 42. The recess 42 can provide a better elastic margin of the first lip portion 41 and have a better contact adhesion effect with the side surface 21 of the slide rail 2, and can reduce the frictional force to make the slip smoother. In this embodiment, the thickness of the head portion 43 is greater than the thickness of the recess portion 42 . The head portion 43 is tapered toward the side surface 21 of the slide rail 2 , and the first lip portion 41 extends downward to the support member 3 . Between the projection ranges of the end faces of the side faces 21 of the slide rails 2, the first lip portion 41 is located on the action thrust line of the support member 3, and the bonding effect is better. Less offset or jitter is generated.

The barrier member 4 preferably further includes at least one pair of pins 44. In the present embodiment, the barrier member 4 includes a plurality of pairs of pins 44. The barrier member 4 is assembled with the support member 3 and each pair of pins 44 are located in the corresponding slot 31. On the opposite side of the two sides, the pair of pins 44 and the corresponding slots 31 are inserted into the insertion portion 11, and the pair of pins 44 are deformed and held by the portion of the support member 3 located near the corresponding slot 31. Between the support member 3 and the slider 1, and the width of the insertion portion 11 is less than or equal to the maximum width of each pair of pins 44, and each pair of pins 44 can be press-fitted into the corresponding insertion portion 11, such that the support The component 3 is not only pressed in parallel with the barrier member 4, which ensures that the barrier member 4 is not easily displaced, and the effect of stable holding and positioning can be achieved. In addition, the barrier member 4 and the supporting member 3 of the present invention are preferably arranged in a manner of enclosing the supporting member 3 in the blocking member 4 by using a packaging process, thereby achieving a close combination effect; The way to structure the structure and improve product reliability.

Preferably, one end of the blocking member 4 has an inclined portion 45 that abuts against the inclined surface 32. The inclined structure of the inclined portion 45 is complementary to the shape of the inclined surface 32 of the supporting member 3, such that the supporting member 3 and The barrier members 4 can be in close contact with each other. In addition, after the blocking member 4 is clamped by the supporting member 3, the blocking member 4 generates a slight flow deformation, and the inclined surface 32 can provide the flow deformation direction of the blocking member 4. The side surface 21 of the slide rail 2 can automatically maintain the contact member 4 and the side surface 21 of the slide rail 2 to maintain a good contact adhesion effect after some micro-wearing.

Referring to FIG. 6, in a second preferred embodiment of the present invention, the barrier member 4a of the second preferred embodiment further includes a gap from a first lip portion 41 as compared with the first embodiment. A second lip portion 46 is provided, and the second lip portion 46 is disposed on an end surface of the support member 3 facing the side surface 21. Wherein, the second lip portion 46 extends to be aligned with the end surface of the support member 3, However, it may extend downward beyond the end surface of the supporting member 3, and the second lip portion 46 may contact the side surface 21 of the sliding rail, so that the structure can further increase the resistance of, for example, iron filings or the like to the slider and the sliding. The effect between the rails. It can be understood that even if the second lip portion 46 does not contact the side surface 21 of the slide rail or does not contact the side surface 21 of the slide rail after being worn, the second lip portion 46 can be further reduced and The gap between the side faces 21 of the slide rails also has a good effect of blocking foreign matter. It should be noted that when the barrier member 4a is provided with two lips, it is possible to selectively make only one of the lips contact the side 21 of the slide rail, or both the lip portions and the side surface 21 of the slide rail. contact.

Referring to FIG. 7, in a third preferred embodiment of the present invention, each pair of pins 44a of the blocking member 4b of the present embodiment has a card neck 47 and a corresponding one. The card neck 47 extends toward the protrusions 48 of the slider 1 , and the two sides of the slots 31 a of the support member 3 a of the embodiment are provided with a groove 33 , and each of the card necks 47 is engaged with the corresponding groove In the 33, each of the protrusions 48 is received in the corresponding slot 31a of the slider. In this way, each of the pins 44a can be deformed by the forced compression of the supporting member 3a, and can be blocked by the edges of the supporting member 3a through the stepped projections 48, thereby ensuring that the blocking member 4b is not easily displaced and stabilized. The effect of holding and positioning.

In summary, the relatively rigid supporting member of the dustproof structure at the bottom of the slider has a relatively narrow barrier gap on the side of the sliding rail, thereby effectively preventing, for example, iron filings or the like from entering the slider and the sliding. Between the rails, the slip between the slider and the slide rail can be ensured smoothly, and the foreign matter is prevented from damaging the slider or the slide rail, or the machining accuracy is affected.

Furthermore, the relatively soft barrier member can be designed to be partially clamped or latched between the support member and the bottom of the slider to ensure that the barrier member is not easily displaced and stably held and positioned. The effect.

In addition, the relatively soft barrier can be designed to have two lips, which can be further improved. The step of reducing the gap between the side of the slide rail and the side of the slide rail is better for blocking foreign matter.

The most significant difference from the conventional structure of the present invention is that it provides a dustproof structure for a double pack, and the two sets of spacers are made of a relatively rigid support member (e.g., metal) and a relatively soft barrier member (e.g., rubber). The mutual arrangement is such that the hard and large metal impurities can be first isolated by the relatively hard support member (metal barrier), and the other layer of relatively soft barrier (rubber barrier) can achieve double barrier The effect of foreign impurities, that is, the relatively hard support member (metal barrier) can prevent external iron filings or hard impurities in time, while the other relatively soft barrier (rubber barrier) can effectively wear the sliding rail, 俾The relatively soft barrier (rubber barrier) can maximize the wear resistance, effectively avoiding the problem of excessive wear of foreign rubber and sliding rail impurities in the past single rubber barrier, and greatly improving the dustproof effect of the slider.

In summary, the overall structural design, practicability and efficiency of the present invention are indeed fully in line with the needs of industrial development, and the disclosed structural invention is also an unprecedented innovative structure, so it has "novelty" should Undoubtedly, the invention can be more effective than the conventional structure, and therefore has "progressiveness", which fully complies with the requirements of the application requirements of the invention patents of the Chinese Patent Law, and is filed according to law, and please The bureau will review it early and give it affirmation.

1‧‧‧ Slider

2‧‧‧Slide rails

21‧‧‧ side

3‧‧‧Support components

4‧‧‧Resistance

Claims (10)

a dustproof structure at the bottom of the slider, the slider is spanned on a sliding rail, the sliding rail has a side, and the dustproof structure at the bottom of the slider comprises: a supporting component coupled to the slider and extending toward the side of the sliding rail and Having a barrier gap with the side surface; and a barrier member that is relatively softer than the support member and held between the support member and the slider, including a first lip that contacts a side of the slide rail . The dust-proof structure at the bottom of the slider according to claim 1, wherein the barrier slit is not more than 0.3 mm. The dust-proof structure at the bottom of the slider according to claim 1, wherein the slider is further provided with at least one insertion portion, the support member comprises at least one slot, the barrier member comprises at least one pair of pins, the barrier member and the support member The at least one pair of pins are opposite to the side of the at least one slot, and the at least one pair of pins are inserted into the at least one insertion portion, and the at least one pair of pins are supported by the at least one pair of pins A portion of the component adjacent the at least one slot is deformably pressed against the support member and the slider. The dust-proof structure at the bottom of the slider according to claim 3, wherein the two sides of each of the slots are provided with a groove, each of the pins of each pair has a neck and a neck extending from the neck and protruding toward the slider The step is convex, and each of the card necks is disposed in the corresponding groove, and each of the protrusions is disposed in the corresponding slot. The dust-proof structure at the bottom of the slider according to claim 1, wherein the support member comprises a slope facing the bottom of the slider, and one end of the barrier member has an inclined portion oppositely abutting the slope. The slider bottom dust-proof structure according to claim 1, wherein the first lip extends downward into a projection range of one end surface of the support member side. The dustproof structure at the bottom of the slider according to claim 1, wherein the barrier member has a recess facing away from the a recess of the slider and a head provided with the first lip, the thickness of the head being greater than the thickness of the recess. The bottom dust-proof structure of the slider of claim 7, wherein the head tapers toward a side of the slide rail. The dustproof structure of the bottom of the slider according to claim 1, wherein the barrier member further comprises a second lip spaced apart from the first lip, the second lip being disposed on the side of the supporting member facing the side End face. The slider bottom dustproof structure of claim 9, wherein the second lip extends downward beyond an end surface of the support member, wherein the second lip is contactable or non-contacting the slide rail.