Linear guide rail with adjustable pre-tightening force

Abstract

The utility model relates to the technical field of linear guide rail manufacturing, in particular to a linear guide rail capable of adjusting pretightening force, which comprises a guide rail, a sliding block is slidably mounted on the guide rail, loop covers are fixedly mounted at the front end and the rear end of the sliding block, side sealing rings are fixedly mounted on the outer side surfaces of the loop covers, and a lubricating component is arranged in the sliding block. A plurality of rotating grooves are formed in the left side wall and the right side wall of the sliding block at equal intervals, lifting assemblies are arranged in the rotating grooves, ball bearing pieces are installed at the working ends of the lifting assemblies, rotating balls are installed in the ball bearing pieces, clamping grooves are formed in the two sides of the guide rail, and clamping grooves are formed in the clamping grooves. The side, away from the ball bearing piece, of the rotating ball is matched with the clamping groove in shape. The rotating ball can be adjusted to a proper position in the clamping groove according to needs, so that the friction force between the rotating ball and the clamping groove is adjusted, and the pre-tightening force can be further adjusted.

Description

Technical Field

[0001] This utility model relates to the field of linear guide manufacturing technology, and in particular to a linear guide with adjustable preload. Background Technology

[0002] With the continuous development of modern manufacturing technology, CNC technology, mechatronics, and industrial robots are increasingly being used in production.

[0003] With the continuous improvement of the positioning, guiding accuracy, cutting speed, and rapid feed of mechanical transmission mechanisms, linear rolling guides have replaced the previously widely used sliding linear guides. Centralized lubrication in control systems has replaced manual oil supply. Linear rolling guides can achieve high-precision linear motion under high loads. Preload is a very important parameter for rolling guides. By adjusting the preload, the flexibility and rigidity of the slider can be changed, thereby improving the accuracy of the rolling guide.

[0004] The adjustment of the friction between the existing guide rail and slide is equivalent to the adjustment of the synchronous preload. Currently, the preload is usually adjusted by adjusting the screw on the spindle, but the adjustment effect is not intuitive. Utility Model Content

[0005] The purpose of this invention is to solve the aforementioned problems in the prior art by proposing an adjustable preload linear guide rail.

[0006] To achieve the above objectives, the present invention adopts the following technical solution:

[0007] An adjustable preload linear guide rail includes a guide rail, a slider slidably mounted on the guide rail, a circuit cover fixedly mounted at both ends of the slider, a side sealing ring fixedly mounted on the outer side of the circuit cover, a lubrication component inside the slider, multiple rotating grooves evenly spaced on the left and right side walls of the slider, a lifting component inside the rotating groove, a ball bearing component mounted at the working end of the lifting component, a rotating ball mounted inside the ball bearing component, and a locking groove on both sides of the guide rail, the side of the rotating ball away from the ball bearing component conforming to the shape of the locking groove.

[0008] Preferably, the lubrication assembly includes multiple oil pipe grooves opened inside the upper part of the slider, an oil inlet connected to the multiple oil pipe grooves is fixedly installed on one side of the slider, the end of the oil inlet away from the cavity is connected to an external lubricating oil supply device, and multiple oil outlets connected to the oil pipe grooves are evenly distributed below the middle position of the slider.

[0009] Preferably, the lifting assembly comprises a rotating shaft rotatably installed inside a rotating groove, a telescopic rod fixedly installed at the lower end of the rotating shaft, a lifting piece fixedly connected to the working end of the telescopic rod, a connecting piece fixedly connected to one end of the lifting piece, and the upper end of the connecting piece is fixedly connected with the ball supporting piece.

[0010] Preferably, the inner wall of the clamping groove is attached with a glue layer.

[0011] Preferably, the clamping groove is divided into three parts from top to bottom, the upper part clamps one third of the rotating ball, the middle part clamps one half of the rotating ball, and the lower part clamps two thirds of the rotating ball.

[0012] Compared with the prior art, the utility model has the advantages that:

[0013] In the application, the rotating ball can be adjusted into a suitable position in the clamping groove according to the need, so as to adjust the friction force between the two, and further adjust the pre-tightening force. BRIEF DESCRIPTION OF DRAWINGS

[0014] Fig. 1 It is a side view structural schematic diagram of the linear guide rail with adjustable pre-tightening force;

[0015] Fig. 2 It is a schematic diagram of the mutual cooperation structure of the sliding block and the oil inlet of the linear guide rail with adjustable pre-tightening force;

[0016] Fig. 3 It is a schematic diagram of the mutual cooperation structure of the sliding block and the rotating ball of the linear guide rail with adjustable pre-tightening force;

[0017] Fig. 4 It is a schematic diagram of the mutual cooperation structure of the rotating ball and the ball supporting piece of the linear guide rail with adjustable pre-tightening force.

[0018] In the drawing: 1 sliding block, 2 guide rail, 3 circuit cover, 4 side sealing ring, 5 oil inlet, 6 oil outlet, 7 rotating groove, 8 rotating ball, 9 ball supporting piece, 10 connecting piece, 11 lifting piece, 12 rotating shaft, 13 telescopic rod, 14 limiting groove, 15 clamping groove, 16 glue layer, 17 oil pipe groove. DETAILED DESCRIPTION

[0019] The technical solutions in the embodiments of the utility model will be clearly and completely described below with reference to the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all the embodiments.

[0020] REFERENCE Figs. 1 to 4The utility model provides a kind of adjustable pre-tightening force linear guide rail, including guide rail 2, guide rail 2 both sides are provided with clamping groove 15, clamping groove 15 inner wall is attached with adhesive layer 16, guide rail 2 is slidably installed with slider 1, slider 1 front and rear ends are fixedly installed with loop cover 3, loop cover 3 outer side is fixedly installed with side sealing ring 4, loop cover 3 and side sealing ring 4 are prior art, and their specific structure design is not repeated here, multiple oil pipe grooves 17 are set in slider 1 upper inside, slider 1 one side is fixedly installed with the oil inlet 5 communicated with multiple oil pipe grooves 17, the end of oil inlet 5 away from cavity is connected with external lubricating oil supply equipment, multiple oil outlets 6 communicated with oil pipe groove 17 are evenly distributed in the lower middle position of slider 1.

[0021] Multiple rotating grooves 7 are set in the left and right side walls of slider 1 with equal interval, rotating shaft 12 is rotatably installed in rotating groove 7, telescopic rod 13 is fixedly installed in the lower end of rotating shaft 12, lifting piece 11 is fixedly connected with the working end of telescopic rod 13, connecting piece 10 is fixedly connected with one end of lifting piece 11, lifting piece 11 and connecting piece 10 form approximate "V" shape structure design, so that lifting piece 11 can rotate around rotating shaft 12 with connecting piece 10 when lifting piece 11 is actuated, ball holder 9 is fixedly connected with the upper end of connecting piece 10, limiting groove 14 is set in the inner side wall of slider 1, ball holder 9 rotates in limiting groove 14, rotating bead 8 is installed in ball holder 9, rotating bead 8 side away from ball holder 9 is adapted to the shape of clamping groove 15, and clamping groove 15 is divided into three parts from top to bottom, the upper position can clamp one third of rotating bead 8, the middle position can clamp one half of rotating bead 8, and the lower position can clamp two thirds of rotating bead 8.

[0022] The specific working principle of the utility model is as follows: firstly, the sliding block 1 is slid into the guide rail 2 with the loop cover 3 and the side sealing ring 4, then the oil pipe and the oil inlet 5 are connected, the lubricating oil flows from the oil outlet 6 on the sliding block 1, drops on the rotating ball 8 along the oil pipe groove 17, so that the lubricating can be carried out, and the sliding on the guide rail 2 can be carried out. When adjustment is needed, firstly, the clamping groove 15 is arranged on the guide rail 2, the shape of the clamping groove 15 is one third of the rotating ball 8, one half of the rotating ball 8 and two thirds of the rotating ball 8, the position of the rotating ball 8 is in the uppermost one third groove at the beginning, then the lifting piece 11 is pulled, the connecting piece 10 is driven to drive the ball supporting piece 9 to rotate downward, the connecting piece 10 rotates in the rotating groove 7, the ball supporting piece 9 rotates in the limiting groove 14, the inner rotating shaft 12 also rotates, the telescopic rod 13 is retracted, a limiting function is realized, then when the ball falls into the one half groove, the rotating is stopped, at this time, a bottom feeling is felt due to the glue layer 16 arranged in the clamping groove 15, the rotating is stopped at this time, the rotating ball 8 enters the one half groove, so that the contact area between the rotating ball 8 and the clamping groove 15 is increased, the friction is increased, the pre-tightening force is adjusted, so that the pre-tightening force can be adjusted according to the need, and if the rotating ball 8 needs to be moved to the two thirds groove of the clamping groove 15, the same operation is also carried out.

[0023] The above is only the preferred specific implementation manner of the utility model, but the protection scope of the utility model is not limited to this, any skilled person in the technical field according to the technical scheme and the utility model concept of the utility model within the technical range disclosed by the utility model carries out equivalent replacement or change, should be covered in the protection scope of the utility model.

Claims

1. An adjustable pre-tightening force linear guide rail, comprising a guide rail (2), a sliding block (1) is slidingly installed on the guide rail (2), a loop cover (3) is fixedly installed at both front and rear ends of the sliding block (1), and a side sealing ring (4) is fixedly installed on the outer side surface of the loop cover (3), characterized in that, The slider (1) is internally provided with a lubricating assembly, a plurality of rotating grooves (7) are equally and periodically arranged on the left and right side walls of the slider (1), the rotating grooves (7) are internally provided with a lifting assembly, a ball receiving member (9) is mounted at the working end of the lifting assembly, a rotating ball (8) is internally mounted in the ball receiving member (9), the guide rail (2) is provided with a clamping groove (15) on both sides, and the side, away from the ball receiving member (9), of the rotating ball (8) is adapted to the shape of the clamping groove (15).

2. The linear guide rail with adjustable pre-tightening force according to claim 1, wherein The lubricating assembly comprises a plurality of oil pipe grooves (17) arranged in the upper part of the slider (1), an oil inlet (5) is fixedly mounted on one side of the slider (1) and communicates with the oil pipe grooves (17), one end of the oil inlet (5), away from the cavity, is connected with external lubricating oil supply equipment, and a plurality of oil outlets (6) are evenly distributed below the middle position of the slider (1) and communicate with the oil pipe grooves (17).

3. The linear guide rail with adjustable pre-tightening force according to claim 1, wherein The lifting assembly comprises a rotating shaft (12) rotatably mounted in the rotating groove (7), a telescopic rod (13) is fixedly mounted at the lower end of the rotating shaft (12), a lifting member (11) is fixedly connected at the working end of the telescopic rod (13), a connecting member (10) is fixedly connected at one end of the lifting member (11), and the upper end of the connecting member (10) is fixedly connected with the ball receiving member (9).

4. The linear guide rail with adjustable pre-tightening force according to claim 1, wherein The inner wall of the clamping groove (15) is attached with a glue layer (16).

5. The linear guide rail with adjustable pre-tightening force according to claim 1, wherein The clamping groove (15) is divided into three parts from top to bottom, the upper part clamps one third of the rotating ball (8), the middle part clamps one half of the rotating ball (8), and the lower part clamps two thirds of the rotating ball (8).

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