Screw type linear guide rail

Abstract

The utility model discloses a screw type linear guide rail which comprises a sliding rail, a ball screw is rotatably installed on the sliding rail, a sliding seat in sliding fit with the sliding rail is assembled on the ball screw, a motor in transmission connection with the ball screw is fixedly installed at one end of the sliding rail, and the sliding seat comprises an upper sliding block and a lower sliding block which are combined to form a split structure; the fixed table is fixedly connected to the top of the upper sliding block. One end of the double-end stud is in screwed connection with the lower sliding block through threads, and the other end of the double-end stud penetrates through the upper sliding block and the fixed table; the nut is connected to the other end of the double-end stud in a screwed mode through threads. The compression spring is sleeved on the double-end stud between the fixed table and the nut; the dustproof sheet is fixedly connected to the bottom side, close to the edge, of the upper sliding block. According to the utility model, the maintenance process is simplified by utilizing the design of the split sliding seat, and meanwhile, the long-term stable performance is ensured through an effective dustproof and lubricating structure.

Description

TECHNICAL FIELD

[0001] The utility model relates to linear guide rail technical field especially relates to a screw rod type linear guide rail. BACKGROUND

[0002] The screw rod type linear guide rail is a precision mechanical assembly integrating a ball screw transmission device and a linear guide rail, aiming to realize high-precision and high-efficiency linear motion.

[0003] However, this structure has a disadvantage: since multiple balls roll in the same circulating channel, once one ball is damaged or stuck, the entire ball circulating device cannot operate normally. Moreover, for this structure, it is relatively difficult to replace the damaged ball alone, and usually the entire slider unit needs to be replaced, which not only increases the maintenance cost, but also makes the maintenance process complex and time-consuming and laborious. SUMMARY

[0004] The utility model aims at: in order to solve the technical problem mentioned in the above background art, a screw rod type linear guide rail is provided.

[0005] In order to achieve the above purpose, the utility model adopts the following technical scheme:

[0006] A screw rod type linear guide rail, comprising a slide rail, a ball screw rotatably installed on the slide rail, a sliding seat assembled on the ball screw and slidingly matched with the slide rail, a motor fixedly installed at one end of the slide rail and drivingly connected with the ball screw, the sliding seat comprising:

[0007] The upper slide block and the lower slide block are combined in a split type structure.

[0008] A fixed table is fixedly connected to the top of the upper slide block.

[0009] A double-headed stud is threadedly connected between one end and the lower slide block, and the other end passes through the upper slide block and the fixed table.

[0010] A nut is threadedly connected to the other end of the double-headed stud.

[0011] A compression spring is sleeved on the double-headed stud between the fixed table and the nut.

[0012] A dustproof sheet is fixedly connected to the bottom side of the upper slide block near the edge.

[0013] As a further description of the above technical scheme:

[0014] Oil overflow grooves are formed on both sides of the top of the lower slide block near the center hole, and the oil overflow grooves and the center hole of the lower slide block are connected through a plurality of oil return grooves arranged in the axial direction of the center hole.

[0015] As a further description of the above technical solution:

[0016] The lower sliding block is provided with a frame groove matched with the dustproof sheet.

[0017] As a further description of the above technical solution:

[0018] The fixed table and the upper sliding block are fixedly connected through a plurality of bolts.

[0019] As a further description of the above technical solution:

[0020] The upper sliding block is provided with a second positioning hole on both sides of the top, and the fixed table is fixedly connected with a second positioning column matched with the second positioning hole on both sides of the bottom.

[0021] As a further description of the above technical solution:

[0022] The upper sliding block is provided with a second positioning hole on both sides of the top, and the fixed table is fixedly connected with a second positioning column matched with the second positioning hole on both sides of the bottom.

[0023] As a further description of the above technical solution, the beneficial effects of the present application are:

[0024] 1、In the present application, when the ball needs to be replaced due to wear, the nut is removed, the fixed table and the upper sliding block are taken out from the double-headed stud, the ball is exposed, the worn ball is taken out, and a new ball is installed, which is convenient to replace and does not need to replace the whole sliding seat.

[0025] 2、In the present application, when the ball is worn due to long-term use, the compression spring continuously applies pressure to the upper and lower sliding blocks, so that even if the ball is worn, the elastic potential energy of the compression spring can push the upper sliding block to move downward, automatically adjust and compensate the gap caused by the wear of the ball, and ensure that the ball always maintains close contact with the ball screw and the sliding block, thereby maintaining the high-precision operation of the device.

[0026] 3、In the present application, the excess lubricating oil flows out from the oil overflow groove and returns to the upper and lower sliding blocks through the oil return groove, which ensures good lubrication between the ball screw and the upper and lower sliding blocks, reduces friction, and prolongs the service life.

[0027] 4、In the present application, the dustproof sheet is fixedly connected to the edge of the bottom side of the upper sliding block, and the lower sliding block is provided with a frame groove matched with the dustproof sheet, which effectively prevents dust and other impurities from entering the working area of the sliding rail and the ball screw, and protects the internal components from pollution and wear. BRIEF DESCRIPTION OF DRAWINGS

[0028] Figure 1 A perspective structural schematic view of a screw type linear guide rail according to an embodiment of the present application is shown;

[0029] Figure 2 A connection structure schematic diagram of a sliding block and a ball screw is shown according to an embodiment of the utility model;

[0030] Figure 3 An explosion structure schematic diagram of a sliding block is shown according to an embodiment of the utility model;

[0031] Figure 4 An enlarged schematic diagram at A in the middle is shown; Figure 3 An enlarged schematic diagram at A in the middle is shown;

[0032] Figure 5 A structure schematic diagram of an upper sliding block is shown according to an embodiment of the utility model;

[0033] Figure 6 A structure schematic diagram of a fixed platform is shown according to an embodiment of the utility model.

[0034] Legend:

[0035] 1, slide rail; 2, motor; 3, sliding seat; 31, lower sliding block; 3101, first positioning hole; 3102, frame groove; 3103, oil overflow groove; 3104, oil return groove; 32, upper sliding block; 3201, second positioning hole; 33, fixed platform; 4, ball screw; 5, bolt; 6, dustproof sheet; 7, nut; 8, double-headed stud; 9, compression spring; 10, first positioning column; 11, second positioning column. DETAILED DESCRIPTION

[0036] 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, rather than all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the utility model.

[0037] Please refer to Figures 1-6 The utility model provides a technical scheme: a screw rod type linear guide rail, including slide rail 1, the slide rail 1 is rotationally installed with ball screw 4, the ball screw 4 is assembled with the sliding fit sliding seat 3 of slide rail 1, and the slide rail 1 one end is fixedly installed with the motor 2 of transmission connection with ball screw 4, when the motor 2 drives the rotation of ball screw 4, the sliding seat 3 (including upper sliding block 32 and lower sliding block 31) assembled on ball screw 4 carries out accurate linear motion along slide rail 1.

[0038] Specifically, as Figures 2-6As shown, the sliding seat 3 comprises: the upper sliding block 32 and the lower sliding block 31 combined in a split structure, facilitating the disassembly and maintenance of the ball between the two groups of sliding blocks; the fixed table 33 and the upper sliding block 32 are fixedly connected through a plurality of bolts 5, the top of the upper sliding block 32 is provided with a second positioning hole 3201 on both sides, the bottom of the fixed table 33 is fixedly connected with a second positioning column 11 matched with the second positioning hole 3201, the top of the lower sliding block 31 is provided with a first positioning hole 3101 on both sides, and the bottom of the upper sliding block 32 is fixedly connected with a first positioning column 10 matched with the first positioning hole 3101, so as to realize precise alignment; one end of the stud bolt 8 is threadedly connected with the lower sliding block 31, the other end penetrates through the upper sliding block 32 and the fixed table 33, the nut 7 is threadedly connected at the other end of the stud bolt 8, the compression spring 9 is sleeved on the stud bolt 8 between the fixed table 33 and the nut 7, necessary pre-tightening force is provided to ensure the close contact between the two groups of sliding blocks, reduce the gap, improve the rigidity and precision of the device, and when the ball is worn, the ball is kept in contact with the sliding block and the ball screw 4 under the pressure of the compression spring 9; the dustproof sheet 6 is fixedly connected to the position close to the edge on the bottom side of the upper sliding block 32, and the lower sliding block 31 is provided with a frame groove 3102 matched with the dustproof sheet 6, which effectively prevents dust and other impurities from entering the working area of the slide rail 1 and the ball screw 4, and protects the internal components from pollution and wear.

[0039] Further, when the ball is worn due to long-term use, the compression spring 9 continuously exerts pressure on the upper and lower sliding blocks, so that even if the ball is worn, the elastic potential energy of the compression spring 9 can push the upper sliding block 32 to move downward, automatically adjust and compensate for the gap caused by the wear of the ball, which ensures that the ball is always in close contact with the ball screw 4 and the sliding block, and maintains high-precision operation of the device. Through this dynamic compensation mechanism, not only the performance decline problem caused by the wear of the ball is reduced, but also the stability and reliability of the entire device are enhanced, which helps to prolong the maintenance cycle of the device, reduce downtime, and improve production efficiency.

[0040] Specifically, as shown in the figure, Figure 4 The top of the lower sliding block 31 is provided with an oil overflow groove 3103 near the hole, and the oil overflow groove 3103 and the hole of the lower sliding block 31 are connected through a plurality of oil return grooves 3104 arranged along the axial direction of the hole, so that the excess lubricating oil flows out from the oil overflow groove 3103 and returns to the upper and lower sliding blocks through the oil return grooves 3104, ensuring good lubrication between the ball screw 4 and the upper and lower sliding blocks, reducing friction and prolonging service life.

[0041] Working principle: in use, first, when the motor 2 drives the ball screw 4 to rotate, the sliding seat 3 (including the upper sliding block 32 and the lower sliding block 31) assembled on the ball screw 4 performs precise linear motion along the slide rail 1;

[0042] Secondly, when the ball is worn out due to long-term use, the compression spring 9 continuously exerts pressure on the upper and lower sliders, and even if the ball is worn out, the elastic potential energy of the compression spring 9 can push the upper slider 32 to move downward, automatically adjust and compensate the gap caused by the wear of the ball;

[0043] Finally, when the ball needs to be replaced due to wear, the nut 7 is disassembled, the fixed table 33 and the upper slider 32 are taken out from the stud 8, the ball is exposed, the worn ball is taken out, and a new ball is installed, so that the replacement is convenient and the entire slide 3 does not need to be replaced.

[0044] The above is only a preferred specific embodiment of the present application, but the protection scope of the present application is not limited thereto, any person skilled in the art can make equivalent replacement or change according to the technical scheme and the inventive concept of the present application within the technical range disclosed by the present application, which should be covered within the protection scope of the present application.

Claims

1. A screw linear guide rail, comprising a slide rail (1), a ball screw (4) rotatably mounted on the slide rail (1), a slide block (3) slidably fitted on the ball screw (4), and a motor (2) fixedly mounted at one end of the slide rail (1) and in driving connection with the ball screw (4), characterized in that, The sliding seat (3) comprises: An upper sliding block (32) and a lower sliding block (31) combined in a split structure; A fixed platform (33) fixedly connected to the top of the upper sliding block (32); A stud (8) threadedly connected between one end and the lower sliding block (31) and the other end passing through the upper sliding block (32) and the fixed platform (33); A nut (7) threadedly connected to the other end of the stud (8); A compression spring (9) sleeved on the stud (8) between the fixed platform (33) and the nut (7); A dustproof sheet (6) fixedly connected to the bottom side of the upper sliding block (32) near the edge.

2. The linear screw guideway according to claim 1, characterized in that The top of the lower sliding block (31) is provided with an oil overflow groove (3103) near the center hole on both sides, and the oil overflow groove (3103) and the center hole of the lower sliding block (31) are connected by a plurality of oil return grooves (3104) arranged in the axial direction of the center hole.

3. A linear screw guideway according to claim 2, characterized in that The lower sliding block (31) is provided with a frame groove (3102) matched with the dustproof sheet (6).

4. The linear screw guideway according to claim 3, characterized in that The fixed platform (33) and the upper sliding block (32) are fixedly connected by a plurality of bolts (5).

5. A linear screw guideway according to claim 4, characterized in that The top of the lower sliding block (31) is provided with a first positioning hole (3101) on both sides, and the bottom of the upper sliding block (32) is fixedly connected with a first positioning column (10) matched with the first positioning hole (3101).

6. A linear screw guideway according to claim 5, characterized in that The top of the upper sliding block (32) is provided with a second positioning hole (3201) on both sides, and the bottom of the fixed platform (33) is fixedly connected with a second positioning column (11) matched with the second positioning hole (3201).

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