JP3129443U - Dustproof device for linear transmission module - Google Patents

Abstract

A dustproof device for a linear transmission module is provided.
An end cover 5 has a through hole 51 through which a screw 4 can pass, and a through hole 51 has a concave groove 52 having a larger diameter. Can be installed. The wiper has an inner edge 71 that contacts the outer periphery of the screw, and a tongue piece 72 that contacts a spiral groove of the screw, and the wiper seals the gap between the screw and the end cover, thereby allowing foreign matter and dust to pass through the gap or Prevents the screw block from entering the slide block. Further, when the lubricating effect of the screw is maintained by preventing leakage of the lubricating oil and the wiper is a porous material, the lubricating oil can be stored to lubricate the screw, and the wiper and the lubricating oil can be lubricated. The blockage reduces the noise of the linear transmission module by 3 to 5 decibels.
[Selection] Figure 3

Description

  The present invention provides a kind of dustproof device for a linear transmission module. Above all, a wiper close to the outer periphery of the screw and the gap between the grooves is added to the slide block, so that the lubricating oil can be stored, the lubricating oil can be prevented from leaking, the lubricating effect of the screw can be maintained, and the noise can be reduced. Aim to have technology to make.

The linear transmission module is an actuator that employs a ball screw, which drives a linear guide rail. The main function is to convert rotational motion to linear motion or to convert torque to axial rebound force, and it has the characteristics of having high accuracy, reversibility, and high efficiency.
US Pat. No. US6585868 presents a variety of linear transmission modules.
US patent US6585868

As shown in Fig. 1 and Fig. 2, the end cover (5) of the existing linear transmission module has no dustproof device attached to the screw (4), and the end cover (5) and screw (4) are both rigid materials. In this case, there is always a gap (A) between the two, and if there is a gap (A), naturally the lubricating function inside the screw (4) cannot be maintained.
In addition, foreign matter and dust can easily enter the slide block (2) from the outer periphery (41) of the screw (4) or the gap (A) between the screw groove (42) and the end cover (5). It affects the circulation and wears the screw joint surface between the screw (4) and the slide block (2), thereby reducing the accuracy and life of the screw (4).

  In order to make up for the disadvantage that the linear transmission module of the known technology does not have a dustproof device for the screw, the linear transmission module of the present invention has a wiper installed on the end cover of the slide block. This wiper moves relative to the slide block and the screw, and uses the wiper to seal the gap between the screw hole and the screw, thereby preventing foreign matter and dust from entering the inside through the gap and groove, Furthermore, since the lubricating effect of the screw is maintained by preventing leakage of the lubricating oil, and the wiper is made of a porous material such as wool felt and sponge, the lubricating oil can be stored and the groove of the screw can be lubricated, and By blocking the wiper and lubricating oil, the noise of the linear transmission module can be reduced by 3 to 5 dB.

The present invention reduces the noise of the linear transmission module by 3 to 5 decibels by blocking the wiper and lubricating oil, prevents foreign matter and dust from entering the screw hole through the gap and groove, and prevents lubricating oil leakage. The lubrication effect of the screw can be maintained, and the wiper itself has a lubrication effect. Therefore, it is possible to omit the design of a large amount of oil passage for forced lubrication, and the lubrication function of the wiper is a linear transmission. It is not affected by the mounting direction of the platform, greatly improving product performance and applicability.

  In order to give the judges a better understanding of the structure, features and other objects of the present invention, here is a detailed description with reference to the drawings of the following excellent examples.

Please refer to FIGS. The present invention
A slide rail (1) having an elongated shape and having a U-shaped cut surface, and grooves (12) are axially installed on the inner walls (11) on both sides of the U-shape,
Installed between the inner walls (11) on both sides of the U-shaped slide rail (1), and has guides (21) respectively corresponding to locations facing the grooves (12) of the slide rail (1) on both sides thereof, A rolling element (3) is provided between the groove (12) of the slide rail (1) and the guide (21) of the slide block (2), and the slide block (3) is axially moved along the slide rail (1). The slide block (2) has screw holes (22) penetrating between the two grooves (21) at both ends, and these screw holes (22) are connected to the slide rail (1). The slide block (2), which is installed along the axial direction, has a spiral groove (42) on the outer periphery (41), which can be screwed into the screw hole (22) of the slide block (2). A spiral groove (23) corresponding to the location of the spiral groove (42) facing the screw (4) in the screw hole (22). A rolling element (3) is mounted between the spiral groove (42) of the screw (4) and the spiral groove (23) of the screw hole (22), and the rolling element (3) is located below the screw hole (22). A screw (4) having a reflux pipe (24), which can circulate and roll
The slide block (2) is installed at both ends in the axial direction along the slide rail (1), the end cover (5) has a through hole (51) through which the screw (4) passes, and the screw (4) The rolling element (3) can be circulated, the slide block (2) is interlocked with the rotational movement of the screw (4), and linear along the slide rail (1) in the axial direction. Positioning transmission can be performed, the end cover (5) has two end covers (5) having a concave groove (52) with a larger diameter on the outer edge of the through hole (51),
The end cover (5) is installed at both ends in the axial direction along the slide rail (1), and has a through hole (61) through which the screw (4) passes through the oil wiper (6). 61) Two oil wipers (6) whose bore is smaller than the groove (52),
An annular thin piece, mounted in the groove (52) of the end cover (5), pressed by the oil wiper (6), and the wiper (7) is oiled with the groove (52) of the end cover (5). The inner edge is fixed between the wiper (6), the wiper (7) moves relative to the slide block (2) and the screw (4), and the wiper (7) contacts the outer periphery (41) of the screw (4). (71), and a screw (4) having a tongue piece (72) that contacts the spiral groove (42), and the gap between the end cover (5) and the screw (4) is sealed by the wiper (7). A plastic wiper (7).

As described above, the present invention has at least the following effect enhancement points.
First, foreign matter and dust can be prevented from entering the slide block (2) through the gap between the screw (4) outer periphery (41) and spiral groove (42) and the end cover (5). Ensure smooth circulation of the element (3), the screw joint surface between the screw (4) and the slide block (2) will not wear, and the screw (4) will be used while maintaining the existing accuracy. Extend life.
2. Since the wiper (7) completely seals the gap between the end cover (5) and the screw (4), it prevents the lubricating oil from leaking from the rolling element (3) inside the slide block (2). The lubricating effect can be maintained.
3.When the wiper (7) is made of a porous material such as wool felt or sponge having plasticity, the wiper (7) is filled with lubricating oil. Since it can be delivered to the screw (4) and itself has a lubricating effect, it is possible to omit the design of a large amount of oil passage for forced oiling.
4. The present invention can reduce the noise of the linear transmission module by 3 to 5 dB by blocking the wiper (7) and the stored lubricating oil.

Please refer to FIG. 8, FIG. 9 and FIG. These are the second embodiment of the wiper (7) of the present invention. The embodiment has two tongue pieces (72) of the wiper (7) of the present invention, and the tongue piece (72) is equally divided from the inner edge (71) wall surface into the inner edge (71). As a result, the two tongue pieces (72) come into contact with the pair of spiral grooves (42) of the screw (4) with a symmetrical and larger surface area, thereby providing the same dustproof and lubricating effect. can get. According to the same theory, as shown in FIG. 11, the number of tongues (72) of the wiper (7) can be set to four or any other number, and the number of the spiral grooves (42) matches the number. It is sufficient that the screw (4) is protected against dust and lubrication.

Summarizing the above, the present invention reliably provides a new technique for effectively solving the dust prevention, lubrication and sound insulation of the screw. Because it is an advanced creation based on the technical philosophy that completely overcomes the problems of the accuracy of conventional screws that are easily reduced and the service life is short, and it also meets the requirements for application for utility model registration, Submit your application here under the law. However, the above-mentioned example is only one relatively excellent example of the present invention, and this does not limit the scope of implementation of the present invention. All equivalent changes and modifications depending on the scope should fall within the scope covered by the present invention.

It is a conventional three-dimensional assembly drawing. It is sectional drawing of the position of FIG. It is a partial exploded view of the present invention. It is a three-dimensional assembly drawing of the present invention. FIG. 4 is a cross-sectional view of the position of FIGS. 4B is a cross-sectional view of the position of FIG. 5C is a cross-sectional view of the position in FIGS. It is an exploded view of the second embodiment of the present invention. It is an assembly drawing of the second embodiment of the present invention. 9D is a cross-sectional view at the position of FIGS. It is sectional drawing of 3rd Example of this invention.

Explanation of symbols

1 Slide rail
11 inner wall
12 groove
2 Slide block
21 Guide
22 Screw hole
23 Spiral groove
24 Reflux tube
3 Rolling element
4 screw
41 circumference
42 Spiral groove
5 End cover
51 Through hole
52 groove
6 Oil wiper
61 Through hole
7 Wiper
71 Inner edge
72 tongue
A gap

Claims (8)

A dust-proof device for a linear transmission module, which slide-fits a slide block on a slide rail. The slide block has a screw hole penetrating through both ends in the axial direction along the slide rail, whereby the screw penetrates the slide block. This screw has a spiral groove corresponding to the screw hole, and by holding a rolling element between them, the slide block is interlocked by the rotational movement of the screw, so that linear positioning transmission can be performed The slide block has end covers attached to both ends in the axial direction along the slide rail, and the end cover has a through hole through which the screw can pass.
A separate wiper is attached to the end cover, and the wiper has an inner edge that contacts the outer periphery of the screw and a tongue that contacts the spiral groove of the screw, and this wiper can seal the gap between the screws. It prevents foreign matter and dust from entering the slide block through the gaps and grooves, prevents leakage of lubricating oil, maintains the lubrication effect of the screw, and reduces the noise generated during operation by separating the wiper. The linear transmission module dustproof device. The slide rail has an elongated shape, the cut surface is U-shaped, grooves are installed in the axial direction on the inner walls on both sides of the U-shape, and the slide blocks are on the inner walls on both sides of the U-shaped slide rail. Between the slide rail groove and the slide block guide, and has a rolling element between the slide rail guide and the end cover. 2. The dustproof device for a linear transmission module according to claim 1, wherein the dustproof device can be circulated. 2. The linear transmission module according to claim 1, wherein an oil wiper is assembled to both ends in the axial direction along the slide rail of the end cover, and the oil wiper has a through hole through which a screw passes. Dustproof device. The end cover has a groove with a large diameter at the outer edge of the through hole, and the diameter of the through hole of the oil wiper is smaller than the groove, so that the wiper is installed in the groove of the end cover, and the oil wiper 4. The dustproof device for a linear transmission module according to claim 3, wherein the wiper is pressed and fixed between the groove of the end cover and the oil wiper, and the wiper moves relative to the slide block and the screw. 2. The wiper tongue piece is installed to protrude from the inner edge wall surface into the inner edge, the inner edge is in contact with the outer periphery of the screw, and the tongue piece is in contact with the spiral groove of the screw. A dustproof device for the linear transmission module described in 1. 6. The dustproof device for a linear transmission module according to claim 5, wherein the number of tongues of the wiper is the same as the number of spiral grooves of the screw. 2. The dustproof device for a linear transmission module according to claim 1, wherein the wiper is made of a plastic material. 2. The dustproof device for a linear transmission module according to claim 1, wherein the wiper is made of a porous material.