CN212003968U - Linear slide - Google Patents

Abstract

The utility model provides a linear slide rail, which includes a rail, a slider and a plurality of return parts. The two opposite sides of the rail each have a first load rolling groove in the shape of a Gothic arc. The slider is arranged on the rail and has two second load rolling grooves in the shape of a Gothic arc. The second load rolling grooves of the slider correspond to the first load rolling grooves of the rail. The two end surfaces of the slider are respectively provided with an end cover, each end cover has two first return grooves, and a plurality of return parts are respectively arranged between the slider and the end cover, and each return part has a second return groove in the shape of a Gothic arc. Therefore, the linear slide rail of the utility model eliminates the connection step difference between the second load rolling groove and the second return groove to improve the running smoothness of the ball.

Description

Linear slide

technical field

The utility model relates to a linear sliding rail, in particular to a linear sliding rail which can improve the smoothness of running.

Background technique

General linear slides mainly use rails, sliders and two end caps to form a circulating path for multiple balls to run. However, the load path formed between the rail and the slider is a Gothic arc cross section, but the return path provided by each end cap is a circular arc cross section, so there must be a junction between the two. The discontinuous step difference causes the balls to easily collide or jam when passing through the step difference, which in turn causes the balls to be unsmooth during reflow.

Taiwan Patent Publication No. I308621 discloses a ball screw recirculation element, wherein the inlet and outlet of the recirculation channel of the recirculation element are made into a Gothic thread corresponding to the thread of the nut, and the recirculation channel is smooth and unequal. The cross section changes from the entrance and exit of one end of the Gothic tooth to an arc-shaped path, and then from the arc-shaped path to the entrance and exit of the other end of the Gothic tooth. However, the smooth and unequal cross-section of the return channel of the return element has the disadvantage of being difficult to manufacture, and may still cause the ball to run unsmoothly.

Utility model content

The main purpose of the utility model is to provide a linear slide rail, which can improve the running smoothness of the balls.

In order to achieve the above main purpose, the linear slide rail of the present invention includes a rail, a slider, two end caps, four return parts, and a plurality of balls. Two opposite sides of the rail are respectively provided with a first load rolling groove, and the cross-sectional shape of each first load rolling groove is a Gothic arc; the sliding block has a sliding groove, and the sliding block can slide with the sliding groove Displaced on the rail, the groove wall of the chute has two opposite second load rolling grooves, the cross-sectional shape of each second load rolling groove is a Gothic arc, and one of the second load rolling grooves of the slider The load rolling groove and one of the first load rolling grooves of the rail correspond to each other to form a load path together. The slider also has two non-load return holes, and the two non-load return holes are located on two opposite sides of the chute. The two end covers are arranged on the two end surfaces of the slider, and each end cover has two first return grooves on one side of the end cover facing the slider. The cross-sectional shape is arc-shaped; the four return parts are arranged in pairs between the slider and one of the end caps, each return part has a second return groove, and the cross-sectional shape of the second return groove The cross-sectional shape of each second load rolling groove is the same as that of the Gothic arc, and the second recirculation groove of each recirculation portion and the first recirculation groove of the end cover cooperate with each other to form a recirculation path. One end of each return path is connected to one end of the load path, and the other end of each return path is connected to one end of the unloaded return hole, so that the load path, the unloaded return hole and the two return paths form together A circular path for these balls to travel.

It can be seen from the above that the linear slide rail of the present invention eliminates the difference in the connecting section between the second load rolling groove and the second return groove, so as to avoid the collision or the ball jamming of these balls during operation, thereby achieving smooth lifting operation. degree purpose.

Preferably, the four return parts can be integrally formed with the slider or assembled with the two end caps in a separable manner.

Preferably, the radius of each first load rolling groove, the radius of each second load rolling groove and the radius of each second return groove are all between 0.2mm-2mm.

Preferably, the hole wall of each unloaded return hole is composed of a first surface and a second surface, the first surface is connected to the second return groove of the return portion, and the second surface is connected to the end cap One of the first recirculation grooves, the cross-sectional shape of the first surface is the same as the cross-sectional shape of the second load rolling groove and the cross-sectional shape of the second recirculation groove, which is a Gothic arc, so that the load return hole can be eliminated. The difference in the connecting section with the second recirculation groove can further improve the smoothness of the running of the balls. In addition, the radius of the first surface is preferably between 0.2mm-2mm, and the cross-sectional shape of the second surface can be circular arc or ellipse.

The detailed structure, characteristics, assembly or usage of the linear slide rail provided by the present invention will be described in the detailed description of the following embodiments. However, those skilled in the art in the field of the present utility model should understand that these detailed descriptions and the specific examples for implementing the present utility model are only used to illustrate the present utility model, but not to limit the scope of the present utility model.

Description of drawings

FIG. 1 is a perspective view of a linear slide rail according to the first embodiment of the present invention.

FIG. 2 is a partial perspective exploded view of the linear slide rail according to the first embodiment of the present invention.

FIG. 3 is an end view of the linear slide rail according to the first embodiment of the present invention with one end cover removed.

4 is a partial cross-sectional view of the linear slide rail according to the first embodiment of the present invention.

5 is a top sectional view of the linear slide rail according to the first embodiment of the present invention.

FIG. 6 is a partial perspective exploded view of the linear slide rail according to the second embodiment of the present invention.

【Symbol Description】

10: Linear slide

20: Rails

22: The first load rolling groove

30: Slider

31: Chute

32: The second load rolling groove

33: Non-load return hole

34: First Surface

35: Second Surface

36: End face

40: End cap

42: The first reflow tank

44: Bolts

50: Return part

52: Second reflow tank

60: Ball

62: Load Path

64: Return path

66: Loop Path

Detailed ways

First of all, it is explained here that in the entire specification, including the embodiments described below and the claims, the terms related to the directionality are based on the directions in the drawings. Next, in the embodiments to be introduced below and the accompanying drawings, the same element numbers represent the same or similar elements or their structural features.

Referring to FIGS. 1 to 3 , the linear slide rail 10 of the first embodiment of the present invention includes a rail 20 , a slider 30 , two end caps 40 , four return parts 50 , and a plurality of balls 60 ( unlimited number).

Two opposite sides of the rail 20 respectively have a first load rolling groove 22 , and each first load rolling groove 22 extends along the length direction of the rail 20 . As shown in FIG. 3 , the cross-sectional shape of each of the first load rolling grooves 22 is a Gothic arch, and the radius is preferably between 0.2 mm and 2 mm.

The sliding block 30 has a sliding groove 31 , and the sliding block 30 straddles the rail 20 with the sliding groove 31 , so that the sliding block 30 can slide along the rail 20 . As shown in FIG. 2 and FIG. 3 , the groove wall of the chute 31 has two second load rolling grooves 32 , and the cross-sectional shape of each second load rolling groove 32 is a Gothic arch. Preferably between 0.2mm-2mm. As shown in FIG. 3 and FIG. 5 , the second load rolling groove 32 of the slider 30 and the first load rolling groove 22 of the rail 20 are matched with each other in a one-to-one manner, so that a load path is formed between them. 62. In addition, as shown in FIG. 2 and FIG. 3 , the slider 30 also has two unloaded return holes 33 , and the two unloaded return holes 33 pass through the two end faces 36 of the slider 30 and are parallel to the two second load rolling grooves 32. As shown in FIG. 3 , the hole wall of each unloaded return hole 33 is composed of a first surface 34 and a second surface 35 , wherein the first surface 34 has the same cross-sectional shape as the second load rolling groove 32 . It is a Gothic arch, preferably between 0.2mm-2mm in terms of radius. As for the cross-sectional shape of the second surface 35, it can be a circular arc or an ellipse, and the circular arc is used here. For example.

The two end caps 40 are respectively locked on the two end faces 36 of the slider 30 by two bolts 44 . Each end cover 40 has two first recirculation grooves 42 on one side of the end cover 40 facing the slider. As shown in FIG. 2 and FIG. 4 , the cross-sectional shape of each first recirculation groove 42 is a circular arc.

The four return parts 50 are provided in pairs between the slider 30 and each end cover 40 in pairs. In this embodiment, the four return parts 50 are integrally formed on two end faces of the slider 30 . 36. As shown in FIGS. 2 to 4 , each recirculation portion 50 has a second recirculation groove 52 , and the second recirculation groove 52 has the same cross-sectional shape as the second load rolling groove 32 of the slider 30 and is in the shape of a Gothic arc. (Gothic arch), preferably between 0.2mm-2mm in terms of radius. The first surface 34 of each unloaded recirculation hole 33 engages with the second recirculation groove of the recirculation portion 50 , and the second surface engages with the first recirculation groove 42 of the end cap 40 . As shown in FIGS. 4 and 5 , the second recirculation groove 52 of each recirculation portion 50 and a first recirculation groove 42 of the end cover 40 cooperate with each other to form a recirculation path 64 , and one end of the recirculation path 64 is connected to the load path 62 . At one end, the other end of the return path 64 is connected to one end of the unloaded return hole 33 , so that the load path 62 , the unloaded return hole 33 and the front and rear return paths 64 together form a circulation path 66 for the balls 60 to run.

As can be seen from the above, the cross-sectional shape of the first loaded rolling groove 22, the cross-sectional shape of the second loaded rolling groove 32, the cross-sectional shape of the second recirculation groove 52, and the cross-sectional shape of the first surface 34 of the unloaded recirculation hole 33 are all in the same shape. The form of the German arc is presented, so that the linear slide rail 10 of the present invention effectively eliminates the difference in the connection stage between the second load rolling groove 32 and the second return groove 52 and the connection stage difference between the second return groove 52 and the non-load return hole 33 , so as to effectively prevent the balls 60 from colliding or jamming during operation, thereby achieving the purpose of improving the smoothness of operation.

In addition, it should be added that the return portion 50 does not necessarily have to be integrally formed on the slider 30 , but can also be a separate component assembled to the end cover 40 , as shown in FIG. 6 , which can also improve the smoothness of operation. Effect. In addition, in order to facilitate the processing of the slider 30, the first surface 34 can also have an arc-shaped cross-sectional shape like the second surface 35, so that the overall cross-sectional shape of the unloaded return hole 33 is presented in a circular form. In this case, since the unloaded recirculation hole 33 is in the unloaded area, even if the cross-sectional shape of the first surface 34 is not a Gothic arc, it will not greatly affect the running smoothness of the balls 60 .

Claims (8)

1. a linear slide rail, is characterized in that, comprises: a rail, two opposite sides of the rail respectively have a first load rolling groove extending along the length direction, and the cross-sectional shape of each first load rolling groove is a Gothic arc; A sliding block has a sliding groove, the sliding block is slidably arranged on the rail with the sliding groove, and the groove wall of the sliding groove has two opposite second load rolling grooves, and each second load rolling groove is in the shape of a second load rolling groove. Gothic arc shape, the second load rolling groove of the slider and the first load rolling groove of the rail are matched with each other to form a load path together, the slider is on two opposite sides of the chute There is a non-load return hole respectively, and the two non-load return holes penetrate through the two end faces of the slider; Two end caps are arranged on the two end faces of the slider, and each end cap has two first return grooves on one side of the end cap facing the slider; A plurality of recirculation parts are respectively arranged between the slider and an end cover, each recirculation part has a second recirculation groove, and the cross-sectional shape of the second recirculation groove is the same as the cross-sectional shape of the second load rolling grooves In the shape of a Gothic arc, the second recirculation groove of each recirculation portion and the first recirculation groove of the end cover cooperate with each other to form a recirculation path, and one end of each recirculation path is connected to an end of the load path. one end, the other end of each return path is connected to one end of the unloaded return hole, so that the load path, the unloaded return hole and the two return paths together form a circulation path; and A plurality of balls are arranged in the two circulation paths. 2 . The linear slide rail as claimed in claim 1 , wherein a plurality of the return portions are integrally formed on the two end surfaces of the slider. 3 . 3 . The linear slide rail as claimed in claim 1 , wherein a plurality of the return portions are detachably assembled on one side of the two end caps facing the slider. 4 . 4. The linear slide rail according to any one of claims 1 to 3, wherein the radius of each first load rolling groove, the radius of each second load rolling groove and the radius of each second return groove are The radius is between 0.2mm-2mm. 5. The linear slide rail according to any one of claims 1 to 3, wherein the hole wall of each unloaded return hole is formed by a first surface and a second surface, and the first surface is connected to each other. The second recirculation groove of the recirculation portion, the second surface is connected to the first recirculation groove of the end cover, and the cross-sectional shape of the first surface is the same as the cross-sectional shape of the second load rolling groove and the second recirculation groove. The cross-sectional shape of the reflow tank is a Gothic arc. 6 . The linear slide rail of claim 5 , wherein the cross-sectional shape of the second surface is a circular arc. 7 . 7 . The linear slide rail of claim 5 , wherein the cross-sectional shape of the second surface is an ellipse. 8 . 8 . The linear slide rail of claim 5 , wherein the radius of each first load rolling groove, the radius of each second load rolling groove, the radius of the first surface of each unloaded return hole and the The radius of each of the second reflow grooves is between 0.2mm-2mm.

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