TWI540268B - Linear guideway - Google Patents

Description

Linear slide

The present invention provides a linear slide that is related to the structure of the linear actuator.

As shown in FIG. 1 and FIG. 2, the slider 10 of the general linear slide mainly includes a slider body 11, a plurality of reflow assemblies 12, a plurality of rolling bodies 13, and a two-end cover 14. The length extension direction of the slider body 11 is defined as In the axial direction X, the slider body 11 is formed with a plurality of return passages 111 extending through the two ends in the axial direction X, and each of the reflow assemblies 12 is rotatably accommodated in the rolling elements 13 and is respectively disposed through a return pipe 121. In each of the return channels 111, the end caps 14 are respectively fixedly disposed at two ends of the slider body 11; when the linear slide rails are in operation, each of the rolling bodies 13 is continuously connected to each of the reflowing components 12 Each of the return pipes 121 is rolled to ensure the smoothness of the end power transmission. Therefore, the good size between each of the return pipes 121 of the reflow assembly 12 and each of the rolling bodies 13 is one of the important factors for ensuring power transmission. However, due to the wide application field of the linear slide rail, when the slider body 11 is in a large size, the length of the slider body 11 in the axial direction X is correspondingly increased. At this time, the slider body 11 is processed. Each of the return channels 111 cannot be in a single time The step of molding work through return passage 111, and therefore must be fabricated from a drilling ends of the slider body 11, respectively, once processed by the respective ends of the slider body 11 so that the way of the slider body 11 The return passages 111 at both ends are not accurately aligned, and thus the phenomenon that the return passages 111 at both ends of the slider body 11 are misaligned or even skewed occurs, as shown in FIG. 2; once the return passage 111 of the slider body 11 is biased During the oblique phenomenon, when the return pipe 121 of the reflow assembly 12 is assembled into the return passage 111, the deflected return passage 111 is deformed, and once the return pipe 121 is deformed, the rolling of the rolling elements 13 is directly affected. The smoothness affects the smoothness and accuracy of the end power transmission; in view of this, the inventors have devoted themselves to research and deeper conceiving, and after a lot of research and development trials, finally invented a linear slide.

The invention provides a linear slide rail whose main purpose is to improve the lack of transmission smoothness and precision when the slider of the general linear slide rail generates the backflow channel deflection condition.

To achieve the foregoing objective, the present invention provides a linear slide rail comprising a slide rail extending along an axial length; a slider is slidably sleeved on the slide rail, and the slider has opposite end faces in the axial direction. The slider forms a plurality of return channels, each of which extends through the two end faces of the slider; the plurality of reflow assemblies are respectively accommodated in the return channels by an axially extending return pipe for rolling the plurality of rolling bodies The two end caps are respectively fixed on the two end faces of the slider; wherein the return pipes of each of the reflow assemblies are sequentially divided into a first body segment, a second body segment and a a third body segment having a first body diameter, the second body segment having a second body diameter, the third body segment having a third body diameter, the first body diameter And the diameter of the third body segment is smaller than the diameter of the second body segment, respectively, and the second body segment of each of the returning assemblies contacts the return channel, and the first body segment and the third body segment are respectively separated from the return channel Has a gap.

The invention is configured by the outer diameter of the return pipe of the reflow assembly, so that the return pipe is placed in the deflected return channel and can be naturally yawed with the second body as a fulcrum, thereby avoiding deformation of the return pipe due to the corresponding deflected return channel. The situation occurs, thereby improving the smoothness and precision of the transmission and reducing the processing difficulty of the return channel and improving the production efficiency.

"Knowledge Technology"

10‧‧‧ Slider

11‧‧‧ slider body

111‧‧‧Return channel

12‧‧‧Reflow components

121‧‧‧Return pipe

13‧‧‧ rolling elements

14‧‧‧End cover

X‧‧‧ axial

"this invention"

20‧‧‧Slide rails

21‧‧‧ rolling groove

30‧‧‧ Slider

31‧‧‧ end face

32‧‧‧Return channel

33‧‧‧ rolling trough

40‧‧‧Reflow components

41‧‧‧Return pipe

410‧‧‧ hollow return channel

411‧‧‧ first leg

412‧‧‧Second body segment

413‧‧‧ third leg

414‧‧‧ fulcrum convex

415‧‧‧First oblique cone

416‧‧‧Second inclined cone

42‧‧‧ rolling element retention department

43‧‧‧Return Department

50‧‧‧ rolling elements

60‧‧‧End cover

61‧‧‧ Return Road

X‧‧‧ axial

D1‧‧‧first body diameter

D2‧‧‧Second body diameter

D3‧‧‧ third leg diameter

L1‧‧‧First leg length

L2‧‧‧Second body length

L3‧‧‧ third leg length

S‧‧‧ gap

R‧‧‧Second section

Figure 1 is a schematic exploded view of a conventional linear slide.

2 is a partial cross-sectional view showing the structural combination of a conventional linear slide.

3 is a schematic exploded view of the linear slide of the present invention.

4 is an exploded perspective view of another perspective view of the linear slide rail of the present invention.

Figure 5 is a partial cross-sectional view showing the ideal state combination of the linear slide rail of the present invention.

Figure 6 is a partial enlarged view of Figure 5.

Fig. 7 is a partially enlarged cross-sectional view showing the combination of the linear slide rails of the present invention, and showing a state in which the holes are biased.

In order to enable your review committee to have a better understanding and understanding of the purpose, features and effects of the present invention, please refer to the following [simplified description of the drawings] for details:

A preferred embodiment of the linear slide rail of the present invention, as shown in FIG. 3 to FIG. 7 , includes: a slide rail 20 extending along an axial direction X, and the slide rail 20 is provided with a plurality of rolling grooves 21 along the axial direction X. In the embodiment, two rolling grooves 21 are respectively disposed on two sides of the sliding rail 20; a slider 30 is slidably sleeved on the sliding rail 20, and the slider 30 has opposite end faces in the axial direction X. 31. The slider 30 is formed with a plurality of return passages 32. Each of the return passages 32 respectively penetrates the two end faces 31 of the slider 30. The one surface of the slider 30 facing the slide rail 20 corresponds to the position of each of the rolling grooves 21 respectively. A rolling groove 33 is disposed along the axial direction X. In this embodiment, the two sliding grooves 33 and the two return channels 32 are respectively disposed on the two sides of the corresponding sliding rail 20; the plurality of returning assemblies 40 respectively include a return pipe 41 extending along the axial direction X. And a rolling element holding portion 42 extending in the axial direction X, and the returning tube 41 and the rolling element holding portion 42 are connected by a reflow portion 43; each of the returning tubes 41 is a hollow tube structure and has a hollow reflow a track 410, and each of the return pipes 41 is sequentially divided into a first body segment 411, a second body segment 412, and a third body in the axial direction X. Section 413, the first body segment 411 has a first body segment diameter D1, the second body segment 412 has a second body segment diameter D2, and the third body segment 413 has a third body segment diameter D3, and the The first body segment diameter D1 and the third body segment diameter D3 are respectively smaller than the second body segment diameter D2; further, the first body segment 411 has a first body segment length L1 in the axial direction X, the second body The section 412 has a second leg length L2 in the axial direction X. The third leg section 413 has a third leg length L3 in the axial direction X. The full length of the return pipe 41 is L1+L2+L3. The ratio of the second leg length L2 to the total length of the return pipe 41 is the second body length ratio α , wherein And the total length of the return pipe 41 extending 20% from the center position on the axial direction X of each of the return pipes 41 is a second body range R, and the second body segment 412 is located in the second body segment range. The surface of the second body segment 412 is further convexly provided with at least one point convex portion 414. The fulcrum convex portion 414 has a semi-circular arc shape, and each of the reflow assemblies 40 is accommodated in the return flow by the return pipe 41. In the channel 32, the rolling element holding portion 42 extends into the position of the slider 30 corresponding to the rolling groove 33; and the second body portion 412 of each of the returning assemblies 40 contacts the return passage 32, and the first body segment 411 and the third body segment 413 and the return channel 32 respectively have a gap S, when the second leg portion 412 is provided with the fulcrum protrusion 414, the fulcrum protrusion 414 contacts the return channel 32; The first body segment 411 and the second body segment 412 may be connected by a first inclined cone segment 415, and the second body segment 413 and the second body segment 412 may have a second tapered cone. Section 416 is coupled, the first inclined cone section 415 and the second inclined cone section 416 obliquely engage the second body section 412 and the first body section 411, the third body section 413; The number of the reflow assemblies 40 of the present embodiment is four; the plurality of rolling elements 50 are rollably disposed in the respective reflow assemblies 40 and pass through the return tubes 41; and the two end covers 60 are formed with a plurality of return passages 61 on one side, each of the end covers 60 The side of the return passage 61 is disposed opposite to the end surface 31 of the slider 30, and the return passage 61 of the end cover 60 is engaged with the hollow return passage 410 of the return pipe 41 and the rolling element holding portion 42 becomes complete. The return path; each of the end covers 60 of the embodiment is provided with two return channels 61 on both sides.

The above is the structural configuration and characteristics of the invention linear slide rail, as shown in Figs. 5 and 6 are ideal state diagrams of the linear slide rail assembly. The ideal state diagram referred to herein means that the return passage 32 of the slider 30 is completely unprocessed after processing. In any deviation, the return passage 32 can be completely aligned by the two end faces 31 of the slider 30 and can be accurately formed in the axial direction X. The return pipe 41 of each of the reflow assemblies 40 can be It is accommodated in each of the return passages 32 without any deformation, and the rolling elements 50 can be smoothly circulated in the return pipe 41 of each of the reflow assemblies 40; however, not all processes can be processed as shown in FIG. 4. In the ideal state, most of the conditions are as shown in Fig. 7. The general processing state causes the return passage 32 of the slider 30 to be deflected from the axial direction X when the return passage 32 is offset from the axial direction X. In the oblique state, since the third body diameter D3 of the return pipe 41 of the reflow assembly 40 of the present invention and the first body diameter D1 are smaller than the second body diameter D2, and the first body segment 411, the third There is a gap S between the body section 413 and the return passage 32, and at the same time, the second The segment 412 is in turn in contact with the return passage 32, so that the return pipe 41 of each of the reflow assemblies 40 can serve as a fulcrum with the second leg portion 412 contacting the return passage 32, and the first leg portion 411 and the first portion The three-legged section 413 can generate a yaw with the second leg section 412 contacting the return passage 32 as a fulcrum, and the return pipe 41 can be adapted to the deflected return passage 32 to naturally generate a yaw, thereby avoiding the reflow. The condition that the return pipe 41 of the assembly 40 is deformed to accommodate the deflected return passage 32 ensures that the return pipe 41 of each of the reflow assemblies 40 maintains its shape extending in the axial direction X, and accordingly ensures each of the rolling elements 50 can smoothly and continuously shift, improve the accuracy and smoothness of the transmission; and it is worth noting that, experimentally, when the second body length ratio α is less than 0.07, the second leg length L2 occupies the return pipe 41 The ratio of the first leg length L1 and the third leg length L3 are longer, so that a significant buckling phenomenon occurs, so that each of the rolling bodies 50 passes. The first body segment 411 and the third body segment 413 at both ends are generated The phenomenon that the running is not smooth occurs; in addition, when the second body length ratio α is greater than 0.07, the second leg length L2 of the second body segment 412 is caused to be too long in the proportion of the return pipe 41. When the return passage 32 of the slider 30 has a hole deviation phenomenon, the reflow tube 41 of the reflow assembly 40 is not easily assembled; therefore, the second body length ratio α is the most in the range of 0.07 to 0.33. In addition, since the return pipe 41 of the reflow assembly 40 of the present invention can adapt to the automatic yaw of the return passage 32, the processing accuracy requirement of the return passage 32 can be reduced, thereby reducing the processing difficulty and improving the processing efficiency. And economic benefit, in the same way, since the return pipe 41 of the reflow assembly 40 of the present invention can adapt to the automatic yaw of the return passage 32 to adapt to the return passage 32, the slider 30 which may be eliminated as long as the return passage 32 has slight deviation is only required to cooperate with the present invention. The reflow assembly 40 of the invention can be utilized, thereby increasing product utilization, reducing unnecessary material cost waste, and improving economic efficiency.

20‧‧‧Slide rails

21‧‧‧ rolling groove

30‧‧‧ Slider

31‧‧‧ end face

32‧‧‧Return channel

33‧‧‧ rolling trough

40‧‧‧Reflow components

41‧‧‧Return pipe

411‧‧‧ first leg

412‧‧‧Second body segment

413‧‧‧ third leg

414‧‧‧ fulcrum convex

415‧‧‧First oblique cone

416‧‧‧Second inclined cone

42‧‧‧ rolling element retention department

43‧‧‧Return Department

50‧‧‧ rolling elements

60‧‧‧End cover

X‧‧‧ axial

Claims (6)

A linear slide rail includes a slide rail extending along an axial length; a slider is slidably sleeved on the slide rail, and the slider has opposite end faces in the axial direction, and the slider forms a plurality of return passages Each of the return channels respectively penetrates the two end faces of the slider; the plurality of reflow assemblies are respectively accommodated in the return channels by an axially extending return pipe for rolling the plurality of rolling bodies; the two end caps are respectively fixed Provided on the two end faces of the slider; the return tube of each of the reflow assemblies is sequentially divided into a first body segment, a second body segment and a third body segment, the first The body segment has a first body diameter, the second body segment has a second body segment diameter, and the third body segment has a third body segment diameter, the first body segment diameter and the third body segment diameter respectively Less than the diameter of the second body segment, and the second body segments of each of the returning assemblies contact the return channel, and the first body segment and the third body segment respectively have a gap between the return channel and the first The body has a first body length (L1) in the axial direction, the second body The segment has a second leg length (L2) in the axial direction, the third leg portion has a third leg length (L3) in the axial direction; 20% extending from the center position of each of the return pipes in the axial direction The total length of the return pipe is a second body range, and the second body segment is located within the second body segment. The linear slide rail according to claim 1, wherein the ratio of the second body length (L2) to the total length of the return pipe is a second body length ratio ( α ), wherein α= . The linear slide rail according to claim 1, wherein the surface of the second body segment is further convexly provided with at least one point convex portion, and the second body portion contacts the return passage with the fulcrum convex portion. The linear slide rail according to claim 3, wherein the fulcrum convex portion has a semicircular arc shape. The linear slide rail according to claim 1, wherein the first body segment and the second body segment are coupled by a first inclined cone segment, and the third body segment and the second body segment are The second inclined cone segment and the second inclined tapered portion are obliquely coupled to the second body segment and the first body segment and the third body segment. The linear slide rail according to claim 1, wherein the slide rail is provided with a plurality of rolling grooves along the axial direction; a side of the slider facing the slide rail is disposed along the axial direction corresponding to each of the rolling groove positions. a rolling groove; each of the reflowing components further comprises an axially extending rolling body holding portion, the return pipe and the rolling body holding portion are connected by a reflow portion; each of the return pipes is a hollow pipe structure And having a hollow return passage, each of the reflow assemblies being received in the return passage by the return pipe, and the rolling element retaining portion extends into the slider corresponding to the position of the rolling groove; and the end cover is Forming a plurality of return passages on one side, each of the end covers being disposed opposite to the end surface of the slider with a side on which the return passage is disposed, and the return passage of the end cover is coupled to the hollow return passage of the return pipe and the rolling element holding portion Complete return path.