Linear guide rail pair with novel lubricating mechanism

Abstract

The utility model relates to a linear guide rail pair with a novel lubricating mechanism, which comprises a guide rail, a sliding block body and end covers mounted at the front end and the rear end of the sliding block body, a fixing cover is connected to one end, close to the sliding block body, of each end cover, an oil storage groove is formed in one end, close to the fixing cover, of each end cover, and a pressing shaft is slidably connected to the inner side of each oil storage groove. A through hole is formed in the end, away from the fixing cover, of the oil storage tank, the connecting shaft is located on the inner side of the through hole and penetrates out of the end cover, and a spring is installed on the outer side of the connecting shaft. When the sliding block is in a lateral vertical installation state, the spring pushes the pressing shaft to move towards one end close to the fixed cover, the pressing shaft pushes lubricating oil on the inner side of the oil storage groove to the connecting oil way, and the lubricating oil in the connecting oil way flows to the inner side of the backflow groove through the distribution oil way to lubricate the balls. Lubricating oil can be evenly distributed into a connecting oil way, and the lubricating oil is prevented from flowing to an oil way at the lower end under the action of gravity.

Description

Technical Field

[0001] The utility model relates to the technical field of linear guide rail pairs, in particular to a linear guide rail pair with a novel lubrication mechanism. Background Art

[0002] The utility model patent with application number: CN202222852547.7 discloses a ball slider, including a slider body, end covers installed at the front and rear ends of the slider body, the end covers are connected to fixed covers near the slider body, the left and right ends of the front fixed cover are fixedly connected to fixed blocks, through holes are opened on the fixed blocks, balls are installed on the inner sides of the through holes, the fixed blocks are located at the left and right ends of the outer side of the slider body, the left and right ends of the front fixed cover are fixedly connected to arc blocks, the arc blocks are located at the left and right ends of the inner side of the slider body, the left and right sides of one end of the fixed cover near the end cover are fixedly connected to circulation blocks, the circulation blocks are used to connect the arc blocks and the through holes, the left and right ends of one end of the end cover near the slider body are opened with reflux grooves compatible with the circulation blocks, the upper end of the end cover is opened with an upper oil circuit, the upper end of the upper oil circuit is provided with an upper bolt threadedly connected to the end cover, the left and right sides of the lower end of the upper oil circuit are provided with connecting oil circuits opened on the end cover, the lower end of the connecting oil circuit is provided with a distribution oil circuit opened on the end cover, and the distribution oil circuit is connected to the reflux groove. In the above technical solution, the balls are connected to the inner side of the circulation channel composed of the through hole, arc block, circulation block and reflux groove. The balls do not contact the slider body, so the balls roll more smoothly, the cost is low, and the slider is easy to add lubricating oil. However, when the slider is in a lateral vertical installation state, when lubricating the balls, the lubricating oil will flow to the oil path at the lower end under the action of gravity to lubricate the reflux groove and balls at the lower end, but the lubricating oil cannot be added to the upper end balls that are actually under load, which leads to increased wear of the upper end balls under load and greatly reduces the service life of the slider. Utility Model Content

[0003] The utility model aims to solve the problems existing in the above-mentioned prior art and provides a linear guide pair with a novel lubrication mechanism, which can continuously provide an extrusion force to the lubricating oil in the oil storage tank to prevent the lubricating oil from flowing to the oil path at the lower end due to gravity.

[0004] The utility model adopts a technical solution to solve its technical problems: the linear guide pair with a novel lubrication mechanism comprises a guide rail and a slider body, end covers installed at the front and rear ends of the slider body, the end of the end cover close to the slider body is connected to a fixed cover, the end of the end cover close to the fixed cover is provided with an oil storage tank, the inner side of the oil storage tank is slidably connected to a pressure shaft, the end of the pressure shaft away from the fixed cover is fixedly connected to a connecting shaft, the end of the connecting shaft away from the pressure shaft is fixedly connected to a pull handle, the end of the oil storage tank away from the fixed cover is provided with a through hole, the connecting shaft is located inside the through hole and passes through the end cover, a spring is installed outside the connecting shaft, and the spring is located between the end cover and the pressure shaft. The left and right sides of the lower end of the oil storage tank are provided with connecting oil passages opened on the end cover, and the left and right sides of the lower end of the connecting oil passage are provided with distribution oil passages opened on the end cover, the distribution oil passages are connected with the reflux groove, and the spring pushes the pressing shaft to move toward one end close to the fixed cover, and the pressing shaft pushes the lubricating oil inside the oil storage tank to the connecting oil passage, and the lubricating oil in the connecting oil passage flows to the inside of the reflux groove through the distribution oil passage to lubricate the ball bearings. When the slider is in a lateral upright installation state, the pressing shaft can continuously provide an extruding force to the lubricating oil in the oil storage tank, so that the lubricating oil can be evenly distributed into the connecting oil passage, thereby preventing the lubricating oil from flowing to the oil passage at the lower end due to gravity.

[0005] In order to further improve it, the oil storage tank is provided with oil inlet grooves opened on the end covers at both the upper and lower ends, and a one-way valve is installed on the inside of the oil inlet groove. The lubricating oil enters the inside of the oil storage tank through the oil inlet groove. Due to the action of the one-way valve, the lubricating oil inside the oil storage tank will not flow out, making it convenient to use.

[0006] To be further improved, the oil storage tank is provided with oil inlet grooves opened on the end covers at both the upper and lower ends, and a sealing screw threadedly connected to the end cover is provided on the inner side of the oil inlet groove. The lubricating oil enters the inner side of the oil storage tank through the oil inlet groove, and the oil inlet groove is sealed by the sealing screw to prevent the lubricating oil inside the oil storage tank from being discharged through the oil inlet groove. The structure is simple and easy to use.

[0007] For further improvement, the cross-sectional dimension of the oil inlet groove is larger than the cross-sectional dimension of the connecting oil path, and the cross-sectional dimension of the connecting oil path is larger than the cross-sectional dimension of the distribution oil path.

[0008] For further improvement, the left and right ends of the fixed cover at the front end are fixedly connected with pipes, a through hole is opened on the slider body, the pipe is slidably connected to the inner side of the through hole, and a ball is installed on the inner side of the pipe. The left and right ends of the fixed cover at the front end are fixedly connected with arc blocks, the arc blocks are located at the left and right ends of the inner side of the slider body, and the left and right sides of one end of the fixed cover close to the end cover are fixedly connected with circulation blocks, the circulation block is used to connect the arc block and the pipe, and the left and right ends of the end cover close to the slider body are opened with reflux grooves compatible with the circulation blocks, the balls are rollingly connected to the inner side of the circulation channel composed of the pipe, the arc block, the circulation block and the reflux groove, the balls do not contact the slider body, the balls roll more smoothly, and the cost is low.

[0009] Further improvement, the fixed cover is integrally injection-molded from plastic and has a self-lubricating effect, so that the ball rolls more smoothly and the manufacturing cost is lower.

[0010] For further improvement, a positioning hole is opened at the rear end of the pipeline, and positioning rings are fixedly connected to the left and right sides of the front end of the fixed cover at the rear end. The positioning rings are slidably connected to the inner side of the positioning hole. The positioning effect of the fixed cover is better, and no additional positioning pins are required for positioning, making the slider assembly more convenient.

[0011] For further improvement, arc grooves are provided at both left and right ends of the inner side of the slider body, and the arc blocks are slidably connected to the inner sides of the arc grooves, so that the positioning effect of the arc blocks is better and the assembly of the slider is more convenient.

[0012] For further improvement, the end cover is provided with a placement groove at one end close to the slider body, and the fixed cover is slidably connected to the inner side of the placement groove, so that the positioning effect of the fixed cover is better and the assembly of the slider is more convenient.

[0013] To further improve, an upper mounting groove is opened on the upper end of the slider body, an upper dustproof block is slidably connected to the inner side of the upper mounting groove, an upper positioning groove is opened on the fixed cover, the upper dustproof block is slidably connected to the inner side of the upper positioning groove, clamping blocks are fixedly connected to the front and rear ends of the upper dustproof block, an upper clamping groove is opened on the end cover, and the clamping block is slidably connected to the inner side of the upper clamping groove, so that the dustproof effect of the slider is better.

[0014] To be further improved, lower installation grooves are opened on both sides of the lower end of the slider body, and a connecting strip is slidably connected to the inner side of the lower installation groove. The two connecting strips are fixedly connected to a lower dustproof strip at one end close to each other, and lower positioning grooves are opened on both sides of the lower end of the fixed cover, and the connecting strip is slidably connected to the inner side of the lower positioning groove. Lower clamping grooves are opened on both sides of the lower end of the end cover, and the connecting strip is slidably connected to the inner side of the lower clamping groove, so that the slider is more comprehensive in dust prevention and has a better dust prevention effect.

[0015] The beneficial effect of the utility model is that the spring pushes the pressing shaft to move toward one end of the fixed cover, and the pressing shaft pushes the lubricating oil inside the oil storage tank to the connecting oil circuit, and the lubricating oil in the connecting oil circuit flows to the inside of the reflux groove through the distribution oil circuit to lubricate the ball bearings; when the slider is in a lateral upright installation state, the pressing shaft can continuously provide an extruding force to the lubricating oil in the oil storage tank, so that the lubricating oil can be evenly distributed into the connecting oil circuit, preventing the lubricating oil from flowing to the oil circuit at the lower end due to gravity. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a structural schematic diagram of the utility model;

[0017] Figure 2 It is an exploded view of the utility model;

[0018] Figure 3 It is a structural schematic diagram of the end cover of the utility model;

[0019] Figure 4 It is a right sectional view of the end cover of the utility model;

[0020] Figure 5 It is a structural schematic diagram of the end cover of the utility model;

[0021] Figure 6 It is a right sectional view of the end cover of the utility model;

[0022] Figure 7 It is a structural schematic diagram of the slider body of the utility model;

[0023] Figure 8 This is a structural schematic diagram of the fixed cover of the utility model;

[0024] Fig. 9 This is a structural schematic diagram of the fixed cover of the utility model;

[0025] Fig.10 This is a structural schematic diagram of the fixed cover of the utility model;

[0026] Fig.11 This is a schematic diagram of the structure of the dustproof block of the utility model;

[0027] Fig.12 It is a structural schematic diagram of the lower dustproof strip of the utility model.

[0028] Explanation of the reference numerals: 1. Slider body; 11. Through hole; 12. Arc groove; 13. Upper mounting groove; 14. Lower mounting groove; 2. Fixed cover; 21. Pipe; 211. Positioning hole; 22. Arc block; 23. Circulation block; 24. Positioning ring; 25. Upper positioning groove; 26. Lower positioning groove; 3. End cover; 31. Reflux groove; 32. Placement groove; 33. Upper clamping groove; 34. Lower clamping groove; 35. Oil storage groove; 351. Oil inlet groove; 352. One-way valve; 353. Sealing screw; 354. Through hole; 355. Connecting oil circuit; 356. Distribution oil circuit; 36. Press shaft; 361. Connecting shaft; 362. Pull handle; 37. Spring; 4. Upper dustproof block; 41. Clamping block; 5. Lower dustproof strip; 51. Connecting strip; 6. Ball bearing; 7. Guide rail. DETAILED DESCRIPTION

[0029] The following is combined with Figure 1-9 The utility model is further described as follows:

[0030] Example 1

[0031] like Figure 1-Figure 4As shown: In this embodiment, a linear guide pair with a novel lubrication mechanism includes a guide rail 7 and a slider body 1, and end covers 3 are installed at the front and rear ends of the slider body 1. The end of the end cover 3 close to the slider body 1 is provided with a placement groove 32, and the inner side of the placement groove 32 is slidably connected with a fixed cover 2. The fixed cover 2 is integrally injection molded by plastic. An oil storage groove 35 is provided at one end of the end cover 3 close to the fixed cover 2, and a pressure shaft 36 is slidably connected to the inner side of the oil storage groove 35. The pressure shaft 36 is fixedly connected to a connecting shaft 361 at one end away from the fixed cover 2, and a pull handle 362 is fixedly connected to the end of the connecting shaft 361 away from the pressure shaft 36. The oil storage groove 35 is away from the fixed cover 2. A through hole 354 is opened at one end, and the connecting shaft 361 is located on the inner side of the through hole 354 and passes through the end cover 3. A spring 37 is installed on the outer side of the connecting shaft 361, and the spring 37 is located between the end cover 3 and the pressure shaft 36. The left and right sides of the lower end of the oil storage tank 35 are provided with connecting oil circuits 355 opened on the end cover 3, and the lower end of the connecting oil circuit 355 is provided with a distribution oil circuit 356 opened on the end cover 3, and the distribution oil circuit 356 is connected with the reflux groove 31. The upper and lower ends of the oil storage tank 35 are provided with oil inlet grooves 351 opened on the end cover 3, and a one-way valve 352 is installed on the inner side of the oil inlet groove 351, and the lubricating oil enters the inner side of the oil storage tank 35 through the oil inlet groove 351.

[0032] like Figure 1-Figure 4 and Figure 7-10 As shown: the left and right ends of the front end fixed cover 2 are fixedly connected with pipes 21, the left and right ends of the slider body 1 are provided with through holes 11, the pipe 21 is slidably connected to the inner side of the through holes 11, and the rear end of the pipe 21 is provided with a positioning hole 211, the left and right sides of the front end of the rear end fixed cover 2 are fixedly connected with positioning rings 24, the positioning rings 24 are slidably connected to the inner side of the positioning hole 211, and the inner side of the pipe 21 is installed with a ball 6, the left and right ends of the front end fixed cover 2 are fixedly connected with arc blocks 22, the left and right ends of the inner side of the slider body 1 are provided with arc grooves 12, the arc block 22 is slidably connected to the inner side of the arc groove 12, the left and right sides of the fixed cover 2 close to the end cover 3 are fixedly connected with circulation blocks 23, the circulation block 23 is used to connect the arc block 22 and the pipe 21, the left and right sides of the end cover 3 close to the slider body 1 are provided with reflux grooves 31 adapted to the circulation block 23, and the ball 6 is rollingly connected to the inner side of the circulation channel composed of the pipe 21, the arc block 22, the circulation block 23 and the reflux groove 31.

[0033] like Figure 1-Figure 4 and Figure 7-Figure 12As shown: an upper mounting groove 13 is opened on the upper end of the slider body 1, and an upper dustproof block 4 is slidably connected to the inner side of the upper mounting groove 13; an upper positioning groove 25 is opened on the fixed cover 2, and the upper dustproof block 4 is slidably connected to the inner side of the upper positioning groove 25; a clamping block 41 is fixedly connected to the front and rear ends of the upper dustproof block 4; an upper clamping groove 33 is opened on the end cover 3, and the clamping block 41 is slidably connected to the inner side of the upper clamping groove 33; lower mounting grooves 14 are opened on the left and right sides of the lower end of the slider body 1, and a connecting strip 51 is slidably connected to the inner side of the lower mounting groove 14; the two connecting strips 51 are fixedly connected to the lower dustproof strip 5 at one end close to each other; lower positioning grooves 26 are opened on the left and right sides of the lower end of the fixed cover 2, and the connecting strip 51 is slidably connected to the inner side of the lower positioning groove 26; lower clamping grooves 34 are opened on the left and right sides of the lower end of the end cover 3, and the connecting strip 51 is slidably connected to the inner side of the lower clamping groove 34.

[0034] Example 2

[0035] like Figure 1-Figure 2 and Figure 5-Figure 6 As shown: In this embodiment, a linear guide pair with a novel lubrication mechanism includes a guide rail 7 and a slider body 1, and end covers 3 are installed at the front and rear ends of the slider body 1. The end of the end cover 3 close to the slider body 1 is provided with a placement groove 32, and the inner side of the placement groove 32 is slidably connected with a fixed cover 2. The fixed cover 2 is integrally injection molded by plastic. An oil storage groove 35 is provided at one end of the end cover 3 close to the fixed cover 2, and a pressure shaft 36 is slidably connected to the inner side of the oil storage groove 35. The pressure shaft 36 is fixedly connected to a connecting shaft 361 at one end away from the fixed cover 2, and a pull handle 362 is fixedly connected to the end of the connecting shaft 361 away from the pressure shaft 36. The end of the oil storage groove 35 away from the fixed cover 2 is provided with a through hole Through hole 354, connecting shaft 361 is located on the inner side of through hole 354 and passes through end cover 3, spring 37 is installed on the outer side of connecting shaft 361, spring 37 is located between end cover 3 and pressing shaft 36, connecting oil passages 355 opened on end cover 3 are provided on left and right sides of the lower end of oil storage tank 35, distribution oil passage 356 opened on end cover 3 is provided on the lower end of connecting oil passage 355, distribution oil passage 356 is communicated with reflux groove 31, oil inlet groove 351 opened on end cover 3 is provided on the upper and lower ends of oil storage tank 35, sealing screw 353 threadedly connected to end cover 3 is provided on the inner side of oil inlet groove 351, lubricating oil enters the inner side of oil storage tank 35 through oil inlet groove 351.

[0036] like Figure 1-Figure 2 and Figure 5-Figure 10As shown: the left and right ends of the front end fixed cover 2 are fixedly connected with pipes 21, the slider body 1 is provided with a through hole 11, the pipe 21 is slidably connected to the inner side of the through hole 11, and the rear end of the pipe 21 is provided with a positioning hole 211, the left and right sides of the front end of the rear end fixed cover 2 are fixedly connected with positioning rings 24, the positioning rings 24 are slidably connected to the inner side of the positioning hole 211, and the inner side of the pipe 21 is installed with balls 6, the left and right ends of the front end fixed cover 2 are fixedly connected with arc blocks 22, the left and right ends of the inner side of the slider body 1 are provided with arc grooves 12, the arc block 22 is slidably connected to the inner side of the arc groove 12, the left and right sides of the fixed cover 2 close to the end cover 3 are fixedly connected with circulation blocks 23, the circulation block 23 is used to connect the arc block 22 and the pipe 21, the left and right ends of the end cover 3 close to the slider body 1 are provided with reflux grooves 31 adapted to the circulation block 23, and the balls 6 are rollingly connected to the inner side of the circulation channel composed of the pipe 21, the arc block 22, the circulation block 23 and the reflux groove 31.

[0037] like Figure 1-Figure 2 and Figure 5-Figure 12 As shown: an upper mounting groove 13 is opened on the upper end of the slider body 1, and an upper dustproof block 4 is slidably connected to the inner side of the upper mounting groove 13; an upper positioning groove 25 is opened on the fixed cover 2, and the upper dustproof block 4 is slidably connected to the inner side of the upper positioning groove 25; a clamping block 41 is fixedly connected to the front and rear ends of the upper dustproof block 4; an upper clamping groove 33 is opened on the end cover 3, and the clamping block 41 is slidably connected to the inner side of the upper clamping groove 33; lower mounting grooves 14 are opened on the left and right sides of the lower end of the slider body 1, and a connecting strip 51 is slidably connected to the inner side of the lower mounting groove 14; the two connecting strips 51 are fixedly connected to the lower dustproof strip 5 at one end close to each other; lower positioning grooves 26 are opened on the left and right sides of the lower end of the fixed cover 2, and the connecting strip 51 is slidably connected to the inner side of the lower positioning groove 26; lower clamping grooves 34 are opened on the left and right sides of the lower end of the end cover 3, and the connecting strip 51 is slidably connected to the inner side of the lower clamping groove 34.

[0038] When the utility model is in use: the pressing shaft 36 is driven by the connecting shaft 361 to move away from the end of the fixed cover 2, the spring 37 is compressed, and the lubricating oil is poured from the oil inlet groove 351 into the inner side of the oil storage groove 35, the connecting shaft 361 is loosened, the spring 37 rebounds and drives the pressing shaft 36 to move toward the end of the fixed cover 2, the pressing shaft 36 presses the lubricating oil into the connecting oil circuit 355, the connecting oil circuit 355 transports the lubricating oil to the inner side of the reflux groove 31 through the distribution oil circuit 356, the lubricating oil contacts the ball 6, and lubricates the ball 6.

[0039] Although the present invention has been illustrated and described with reference to the preferred embodiments, it should be understood by those skilled in the art that various changes in form and detail of the linear guide pair with the novel lubrication mechanism may be made within the scope of the claims.

Claims

1. A linear guide pair with a novel lubrication mechanism, comprising a guide rail (7) and a slider body (1), end covers (3) mounted on the front and rear ends of the slider body (1), and a fixed cover (2) connected to one end of the end cover (3) close to the slider body (1), wherein: An oil storage tank (35) is provided at one end of the end cover (3) close to the fixed cover (2), a pressure shaft (36) is slidably connected to the inner side of the oil storage tank (35), a connecting shaft (361) is fixedly connected to the end of the pressure shaft (36) away from the fixed cover (2), a through hole (354) is provided at the end of the oil storage tank (35) away from the fixed cover (2), the connecting shaft (361) is located inside the through hole (354) and passes through the end cover (3), a spring (37) is installed outside the connecting shaft (361), the spring (37) is located between the end cover (3) and the pressure shaft (36), a connecting oil path (355) opened on the end cover (3) is provided on the left and right sides of the lower end of the oil storage tank (35), a distribution oil path (356) opened on the end cover (3) is provided at the lower end of the connecting oil path (355), and the distribution oil path (356) is connected to the reflux tank (31).

2. According to claim 1, the linear guide pair with a novel lubrication mechanism is characterized in that: The oil storage tank (35) is provided with an oil inlet groove (351) opened on the end cover (3), and a one-way valve (352) is installed inside the oil inlet groove (351).

3. According to claim 1, the linear guide pair with a novel lubrication mechanism is characterized in that: The oil storage tank (35) is provided with an oil inlet groove (351) opened on the end cover (3), and a sealing screw (353) threadedly connected to the end cover (3) is provided inside the oil inlet groove (351).

4. A linear guide pair with a novel lubrication mechanism according to claim 1, 2 or 3, characterized in that: The fixed cover (2) is fixedly connected to the left and right ends with pipes (21), the slider body (1) is provided with a through hole (11), the pipe (21) is slidably connected to the inner side of the through hole (11), the inner side of the pipe (21) is installed with a ball (6), the fixed cover (2) at the front end is fixedly connected to the left and right ends with arc blocks (22), the arc blocks (22) are located at the left and right ends of the inner side of the slider body (1), the fixed cover (2) is fixedly connected to the left and right ends with a circulation block (23) on one end close to the end cover (3), the circulation block (23) is used to connect the arc block (22) and the pipe (21), the end cover (3) is provided with a reflux groove (31) adapted to the circulation block (23) on the left and right ends on the side close to the slider body (1), and the ball (6) is rollingly connected to the inner side of the circulation channel composed of the pipe (21), the arc block (22), the circulation block (23) and the reflux groove (31).

5. The linear guide pair with a novel lubrication mechanism according to claim 4 is characterized in that: The fixed cover (2) is integrally injection-molded from plastic.

6. The linear guide pair with a novel lubrication mechanism according to claim 4 is characterized in that: The rear end of the pipe (21) is provided with a positioning hole (211), and the left and right sides of the front end of the fixed cover (2) at the rear end are fixedly connected with positioning rings (24), and the positioning rings (24) are slidably connected to the inner side of the positioning hole (211).

7. The linear guide pair with a novel lubrication mechanism according to claim 4 is characterized in that: The left and right ends of the inner side of the slider body (1) are provided with arc grooves (12), and the arc blocks (22) are slidably connected to the inner sides of the arc grooves (12).

8. The linear guide pair with a novel lubrication mechanism according to claim 1 is characterized in that: The end cover (3) is provided with a placement groove (32) at one end close to the slider body (1), and the fixed cover (2) is slidably connected to the inner side of the placement groove (32).

9. The linear guide pair with a novel lubrication mechanism according to claim 1 is characterized in that: An upper mounting groove (13) is formed at the inner upper end of the slider body (1), an upper dust block (4) is slidably connected to the inner side of the upper mounting groove (13), an upper positioning groove (25) is formed on the fixed cover (2), the upper dust block (4) is slidably connected to the inner side of the upper positioning groove (25), a clamping block (41) is fixedly connected to the front and rear ends of the upper dust block (4), an upper clamping groove (33) is formed on the end cover (3), and the clamping block (41) is slidably connected to the inner side of the upper clamping groove (33).

10. The linear guide pair with a novel lubrication mechanism according to claim 1 is characterized in that: The slider body (1) is provided with lower mounting grooves (14) on both sides of the inner lower end, and a connecting strip (51) is slidably connected to the inner side of the lower mounting groove (14). The two connecting strips (51) are fixedly connected to a lower dustproof strip (5) at one end close to each other. The fixed cover (2) is provided with lower positioning grooves (26) on both sides of the lower end, and the connecting strip (51) is slidably connected to the inner side of the lower positioning groove (26). The end cover (3) is provided with lower clamping grooves (34) on both sides of the lower end, and the connecting strip (51) is slidably connected to the inner side of the lower clamping groove (34).

Images