Automatic lubricating device for gantry machining center

Abstract

The invention relates to the field of numerical control machine tools, and discloses an automatic lubricating device for a gantry machining center. Comprising a base, gantry machining equipment located on the outer side of the base, a sliding rail installed on the base, a sliding block installed on the sliding rail in a sliding mode, an oil injection channel formed in the sliding rail, an oil inlet pipeline and an oil outlet pipeline, and the oil inlet pipeline and the oil outlet pipeline communicate with the oil injection channel. A lubricating assembly communicating with the oil injection channel is installed in the installation cavity, and the lubricating assembly makes contact with the inner wall of the sliding block and injects oil into the sliding block. Compared with the prior art, the lubricating device has the following advantages and effects that the sliding block continuously makes contact with the plugging ball when moving on the sliding rail, the sliding block and the sliding rail are evenly lubricated through rolling between the plugging ball and the sliding block, the filling amount each time is fixed, waste of lubricating oil caused by the too large filling amount is avoided, and the service life of the lubricating device is prolonged. And oil leakage is avoided during oil injection, so that the production cost is reduced.

Description

Technical Field

[0001] The invention relates to the technical field of numerically controlled machine tools, and in particular to an automatic lubrication device for a gantry machining center. Background Art

[0002] A gantry machining center is a machining center in which the axis of the spindle Z-axis is arranged perpendicular to the worktable. The overall structure is a large-scale machining center with a double base and a top beam forming a gantry structure frame. There is also a cross beam in the middle of the double base. It is particularly suitable for machining large workpieces and workpieces with complex shapes.

[0003] At present, when a gantry machining center is in use, it is necessary to add lubricating oil to the slide rails and the sliders to ensure the normal operation of the slide rails and the sliders. For example, a gantry machining center slider lubrication device disclosed in Chinese patent CN117506546B realizes the control of the amount of lubricating oil added after the ball is squeezed by the slider. The squeezed ball is automatically reset by a spring to achieve repeated filling of lubricating oil. However, after repeated use, the rebound potential energy of the spring is weakened, resulting in the ball failing to return to the initial position and the oil outlet being unable to be sealed. When there is no need to add lubricating oil, oil leakage may occur, resulting in a waste of lubricating oil. The lubricating oil also needs to be cleaned additionally, increasing production costs. Therefore, we propose an automatic lubricating device for a gantry machining center. Summary of the invention

[0004] The purpose of the present invention is to provide an automatic lubrication device for a gantry machining center, which has the effect of controlling the amount of lubricating oil added and avoiding oil leakage.

[0005] The above technical objectives of the present invention are achieved through the following technical solutions: an automatic lubrication device for a gantry machining center, comprising a base, a gantry machining equipment located outside the base, a slide rail installed on the base, a slider slidably installed on the slide rail, an oil injection channel opened on the slide rail, and an oil inlet pipe and an oil outlet pipe connected to the oil injection channel, an installation cavity connected to the oil injection channel is opened on the slide rail, a lubrication component connected to the oil injection channel is installed in the installation cavity, the lubrication component contacts the inner wall of the slider and injects oil therein, a control component for controlling the oil suction and oil injection of the lubrication component is also installed in the installation cavity, an air blowing component for discharging air toward the outer surface of the slide rail is installed on the inner side of the slider, and an extrusion component for causing the air blowing component to discharge air is installed on the slide rail.

[0006] By adopting the above technical scheme, when the gantry processing equipment processes the workpiece, the slider moves back and forth on the slide rail, and the oil outlet pipe can be connected to a lubricating oil barrel at one end away from the slide rail, and the oil inlet pipe is connected to the lubricating oil barrel through a pump. When the pump is started, the lubricating oil in the lubricating oil barrel can be transported to the oil filling channel in the slide rail, and then flows out from the oil outlet pipe back to the lubricating oil barrel to circulate the lubricating oil. The circulating lubricating oil can absorb the heat generated by the friction of the slider on the slide rail, thereby cooling the slide rail and improving the accuracy of the slide rail. When the slider and the slide rail are automatically lubricated, the control component controls the lubrication component to absorb the lubricating oil from the oil filling channel and then fills the contact surface of the slide rail and the slider, thereby realizing automatic lubrication of the slide rail slider. As the slider moves on the slide rail, the extrusion component continuously squeezes the blowing component on the slider, so that the air flow blows the filled lubricating oil evenly, so that the lubricating oil can be filled more evenly, thereby improving the lubrication effect of the slide rail and the slider, and no oil leakage will occur during oil filling, which is beneficial to reducing production costs.

[0007] The present invention is further configured as follows: the oil injection channel is distributed in an S shape on the slide rail, and two ends of the oil injection channel are respectively connected to an oil inlet pipeline and an oil outlet pipeline.

[0008] By adopting the above technical solution, the S-shaped oil injection channel prolongs the flow path of the lubricating oil in the slide rail, which can be better carried away.

[0009] The present invention is further configured as follows: the lubrication assembly includes a bracket installed in the installation cavity, an oil bag installed on the bracket, an oil inlet pipe connecting the oil bag and the oil injection channel, a one-way valve installed on the oil inlet pipe, an oil outlet pipe connected to the oil bag, and a sealing ball rotatably connected to the oil outlet end of the oil outlet pipe and in contact with the inner wall of the slider.

[0010] The present invention is further configured as follows: the oil outlet end of the oil outlet pipe is closed, an oil outlet hole matched with the blocking ball is opened at the oil outlet end of the oil outlet pipe, and the blocking ball is rotatably connected to the oil outlet hole.

[0011] By adopting the above technical solution, the extrusion component intermittently squeezes the oil bag, so that the oil bag is squeezed and then reset, so that the oil outlet pipe absorbs the lubricating oil in the oil filling channel and then squeezes it out through the oil outlet pipe, and the slider continuously contacts the blocking ball when moving on the slide rail, and relies on the rolling between the blocking ball and the slider to evenly lubricate the slider and the slide rail. The setting of the one-way valve allows the oil inlet pipe to only take in oil but not discharge oil, ensuring that the oil sucked in by the oil inlet pipe will be squeezed into the oil outlet pipe for oil filling, and there will be no oil leakage during oil filling, which is beneficial to reduce production costs.

[0012] The present invention is further configured as follows: the control component includes a base plate installed in the installation cavity, a pressure plate slidably connected to the base plate and respectively in contact with the two oil bags, a connecting spring connecting the two pressure plates, a cylinder installed on the inner wall of the installation cavity, and a push block connected to the output end of the cylinder.

[0013] The present invention is further configured as follows: the opposite sides of the two pressing plates are inclined surfaces, and the front and rear sides of the push block are in close contact with the pressing plates and are configured as inclined surfaces that match the pressing plates.

[0014] By adopting the above technical scheme, the cylinder is started to drive the push block to move up and down. When the push block moves up, the inclined surface on the push block squeezes the inclined surface on the pressure plate, so that the two pressure plates move away from each other and squeeze the oil bag. Then the push block moves down, and the connecting spring is reset so that the inclined surface on the push block no longer squeezes the inclined surface on the pressure plate. The two pressure plates are close to each other and the oil bag is reset. In this process, the oil outlet pipe absorbs the lubricating oil in the oil filling channel and then squeezes it out through the oil outlet pipe. When the slider moves on the slide rail, it constantly contacts the blocking ball, and relies on the rolling between the blocking ball and the slider to evenly lubricate the slider and the slide rail. The amount of each filling is fixed to avoid excessive filling amount leading to waste of lubricating oil, and there will be no oil leakage during oil filling, which is beneficial to reduce production costs.

[0015] The present invention is further configured as follows: a limiting plate is further installed on the bottom plate, and when the pressing plate abuts against the limiting plate, the inclined surface on the push block and the inclined surface on the pressing plate still fit each other.

[0016] By adopting the above technical solution and utilizing the design of the limit plate, the inclined surface on the pressure plate and the inclined surface on the push block are always in contact with each other and will not be completely offset, so that the up and down movement of the push block is converted into a change in the distance between the two pressure plates, thereby controlling the oil bag to absorb and inject oil.

[0017] The present invention is further configured as follows: the blowing assembly includes air bags installed on the front and rear sides of the inner wall of the slider and an air pipe connected to the air bag, and the air pipe is provided with two, and the two air pipes face the top and side of the slide rail respectively.

[0018] The present invention is further configured as follows: the extrusion assembly includes an extrusion protrusion installed on the slide rail, the side of the extrusion protrusion away from the slide rail can be configured as an arc or a rounded corner, and a plurality of the extrusion protrusions are provided on the slide rail and are distributed at equal distances.

[0019] By adopting the above technical solution, as the slider moves on the slide rail, the airbag on the slider is continuously squeezed by the extrusion protrusion on the slide rail, so that the airbag is compressed and then reset. The air pipe is used to continuously discharge air to the outer surface of the slide rail, so that the airflow blows the added lubricating oil evenly, so that the lubricating oil can be added more evenly, thereby improving the lubrication effect of the slide rail and the slider. The extrusion protrusion with an arc or rounded design can protect the airbag and prevent the sharp contact surface from scratching the airbag.

[0020] The present invention is further configured as follows: bristles that fit the outer side of the slide rail are also mounted on the slide block, and the bristles are arranged in two rows and are located on the left and right sides of the airbag.

[0021] By adopting the above technical solution, when the slider reciprocates on the slide rail, the bristles on both sides cooperate, one side will comb the bristles to clean the debris attached to the slide rail, and the bristles on the other side can further brush the added lubricating oil evenly, so that the lubricating oil can be added more evenly.

[0022] The present invention is further configured as follows: two or more installation cavities may be provided on the slide rail, and when in use, a controller may be electrically connected to the cylinder to control the operation of the cylinders in the plurality of installation cavities.

[0023] By adopting the above technical solution, when the rebound performance of the connecting spring is affected after repeated use, the degree of deformation of the oil bag may be reduced, thereby resulting in a reduction in oil absorption and oil injection. A plurality of installation cavities are provided, and the controller can control the cylinder in each installation cavity to squeeze the oil bag for oil injection. When the oil injection amount in a single installation cavity is reduced, the oil injection amount of the installation cavity can be increased to improve the lubrication effect of the slide rail and the slider.

[0024] The beneficial effects of the present invention are:

[0025] 1. The cylinder is started to drive the push block to move up and down. When the push block moves up, the inclined surface on the push block squeezes the inclined surface on the pressure plate, so that the two pressure plates move away from each other and squeeze the oil bag. Then the push block moves down, and the connecting spring is reset so that the inclined surface on the push block no longer squeezes the inclined surface on the pressure plate. The two pressure plates are close to each other and the oil bag is reset. In this process, the oil outlet pipe absorbs the lubricating oil in the oil filling channel and then squeezes it out through the oil outlet pipe. When the slider moves on the slide rail, it constantly contacts the blocking ball, and relies on the rolling between the blocking ball and the slider to evenly lubricate the slider and the slide rail. The amount of each filling is fixed to avoid excessive filling amount leading to waste of lubricating oil, and there will be no oil leakage during oil filling, which is beneficial to reduce production costs.

[0026] 2. As the slider moves on the slide rail, the airbag on the slider is continuously squeezed by the extrusion protrusion on the slide rail, so that the airbag is compressed and then reset. The air pipe is used to continuously discharge air to the outer surface of the slide rail, so that the airflow blows the added lubricating oil evenly, so that the lubricating oil can be added more evenly, improving the lubrication effect of the slide rail and the slider. The extrusion protrusion with arc or rounded design can protect the airbag and prevent the sharp contact surface from scratching the airbag.

[0027] 3. When the slider moves back and forth on the slide rail, the bristles on both sides cooperate with each other. One side will use the combing bristles to clean the debris attached to the slide rail, and the bristles on the other side can further spread the added lubricating oil evenly, so that the lubricating oil can be added more evenly.

[0028] 4. When the rebound performance of the connecting spring is affected after repeated use, the degree of deformation of the oil bag may be reduced, which will lead to a reduction in oil absorption and oil injection. Multiple installation cavities are provided, and the controller can control the cylinder in each installation cavity to squeeze the oil bag for oil injection. When the oil injection amount in a single installation cavity is reduced, the oil injection amount of the installation cavity 8 can be increased to improve the lubrication effect of the slide rail 3 and the slider 4. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0030] Figure 1 It is a schematic diagram of the structure of the present invention;

[0031] Figure 2 It is a schematic diagram of the connection structure between the slide rail and the slider of the present invention;

[0032] Figure 3 It is a schematic cross-sectional structure diagram of the connection between the oil injection channel and the slide rail of the present invention;

[0033] Figure 4 is a side sectional view of the connection between the slide rail and the slider of the present invention;

[0034] Figure 5 It is a schematic diagram of the connection structure between the control component and the lubrication component of the present invention;

[0035] Figure 6 It is a schematic diagram of the connection structure between the slider and the blowing assembly of the present invention.

[0036] In the figure, 1. base; 2. gantry processing equipment; 3. slide rail; 4. slider; 5. oil injection channel; 6. oil inlet pipe; 7. oil outlet pipe; 8. installation cavity; 9. bracket; 10. oil bag; 11. oil inlet pipe; 12. one-way valve; 13. oil outlet pipe; 14. blocking ball; 15. bottom plate; 16. pressure plate; 17. connecting spring; 18. cylinder; 19. push block; 20. limit plate; 21. air bag; 22. air pipe; 23. extrusion protrusion; 24. bristles. DETAILED DESCRIPTION

[0037] The technical solution of the present invention will be clearly and completely described below in conjunction with specific embodiments. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0038] See also Figure 1-6 The present invention provides an automatic lubrication device for a gantry machining center, comprising a base 1, a gantry machining equipment 2 located outside the base 1, a slide rail 3 installed on the base 1, a slider 4 slidably installed on the slide rail 3, an oil injection channel 5 provided on the slide rail 1, and an oil inlet pipe 6 and an oil outlet pipe 7 connected to the oil injection channel 5, a mounting cavity 8 connected to the oil injection channel 5 is provided on the slide rail 3, a lubrication component connected to the oil injection channel 5 is installed in the mounting cavity 8, the lubrication component contacts the inner wall of the slider 4 and injects oil thereto, a control component for controlling the oil suction and injection of the lubrication component is also installed in the mounting cavity 8, an air blowing component for discharging air toward the outer surface of the slide rail 3 is installed on the inner side of the slider 4, and an extrusion component for causing the air blowing component to discharge air is installed on the slide rail 3.

[0039] When the gantry processing equipment 2 processes the workpiece, the slider 4 moves back and forth on the slide rail 3, and the end of the oil outlet pipe 7 away from the slide rail 3 can be connected to a lubricating oil barrel, and the oil inlet pipe 6 is connected to the lubricating oil barrel through a pump. When the pump is started, the lubricating oil in the lubricating oil barrel can be transported to the oil filling channel 5 in the slide rail 3, and then flows out from the oil outlet pipe 7 back to the lubricating oil barrel to circulate the lubricating oil. The circulating lubricating oil can absorb the heat generated by the friction of the slider 4 on the slide rail 3, thereby cooling the slide rail 3 and improving the accuracy of the slide rail 3. When the slider 4 and the slide rail 3 are automatically lubricated, the control component controls the lubrication component to absorb the lubricating oil from the oil filling channel 5 and then fills the contact surface of the slide rail 3 and the slider 4, thereby realizing the automatic lubrication of the slide rail 3 and the slider 4. As the slider 4 moves on the slide rail 3, the extrusion component continuously squeezes the blowing component on the slider 4, so that the airflow blows the filled lubricating oil evenly, so that the lubricating oil can be filled more evenly, thereby improving the lubrication effect of the slide rail 3 and the slider 4, and there will be no oil leakage during oil filling, which is beneficial to reducing production costs.

[0040] The oil injection channel 5 is distributed in an S shape on the slide rail 3, and the two ends of the oil injection channel 5 are respectively connected to the oil inlet pipe 6 and the oil outlet pipe 7. The S-shaped oil injection channel 5 extends the flow path of the lubricating oil in the slide rail 3, which can be better carried away.

[0041] The lubrication assembly includes a bracket 9 installed in the installation cavity 8, an oil bag 10 installed on the bracket 9, an oil inlet pipe 11 connecting the oil bag 10 and the oil filling channel 5, a one-way valve 12 installed on the oil inlet pipe 11, an oil outlet pipe 13 connected to the oil bag 10, and a sealing ball 14 rotatably connected to the oil outlet end of the oil outlet pipe 13 and fitted with the inner wall of the slider 4, the oil outlet end of the oil outlet pipe 13 is in a closed state, and the oil outlet end of the oil outlet pipe 13 is provided with an oil outlet hole matched with the sealing ball 14, and the sealing ball 14 is rotatably connected in the oil outlet hole.

[0042] The extrusion component intermittently squeezes the oil bag 10, so that the oil bag 10 is squeezed and then reset, so that the oil outlet pipe 13 absorbs the lubricating oil in the oil filling channel 5 and then squeezes it out through the oil outlet pipe 13. The slider 4 continuously contacts the blocking ball 14 when moving on the slide rail 3, and relies on the rolling between the blocking ball 14 and the slider 4 to evenly lubricate the slider 4 and the slide rail 3. The setting of the one-way valve 12 allows the oil inlet pipe 11 to only take in oil but not discharge oil, ensuring that the oil sucked in by the oil inlet pipe 11 will be squeezed into the oil outlet pipe 13 for oil filling. There will be no oil leakage during oil filling, which is beneficial to reduce production costs.

[0043] The control assembly includes a base plate 15 installed in the installation cavity 8, a pressure plate 16 slidably connected to the base plate 15 and respectively fitted with the two oil bags 10, a connecting spring 17 connecting the two pressure plates 16, a cylinder 18 installed on the inner wall of the installation cavity 8, and a push block 19 connected to the output end of the cylinder 18. The opposite sides of the two pressure plates 16 are both inclined surfaces, and the front and rear sides of the push block 19 are tightly attached to the pressure plates 16 and are set to be inclined surfaces adapted to the pressure plates 16.

[0044] The cylinder 18 is started to drive the push block 19 to move up and down. When the push block 19 moves up, the inclined surface on the push block 19 squeezes the inclined surface on the pressure plate 16, so that the two pressure plates 16 move away from each other, squeezing the oil bag 10, and then the push block 19 moves down, and the connecting spring 17 is reset so that the inclined surface on the push block 19 no longer squeezes the inclined surface on the pressure plate 16, and the two pressure plates 16 approach each other, and the oil bag 10 is reset. In this process, the oil outlet pipe 13 absorbs the lubricating oil in the oil filling channel 5 and then squeezes it out through the oil outlet pipe 13. When the slider 4 moves on the slide rail 3, it constantly contacts the blocking ball 14, and relies on the rolling between the blocking ball 14 and the slider 4 to evenly lubricate the slider 4 and the slide rail 3. The amount of each filling is fixed to avoid excessive filling amount leading to waste of lubricating oil, and there will be no oil leakage during oil filling, which is beneficial to reduce production costs.

[0045] A limiting plate 20 is also installed on the bottom plate 15. When the pressure plate 16 is in contact with the limiting plate 20, the inclined surface on the push block 19 and the inclined surface on the pressure plate 16 are still in contact with each other. By utilizing the design of the limiting plate 20, the inclined surface on the pressure plate 16 and the inclined surface on the push block 19 are always in contact with each other and will not be completely offset, so that the up and down movement of the push block 19 is converted into a change in the distance between the two pressure plates 16, thereby controlling the oil bag 10 to absorb and inject oil.

[0046] The blowing assembly includes an air bag 21 installed on the front and rear sides of the inner wall of the slider 4 and an air pipe 22 connected to the air bag 21. The air pipe 22 is provided in two, and the two air pipes 22 face the top and the side of the slide rail 3 respectively. The extrusion assembly includes an extrusion protrusion 23 installed on the slide rail 3. The side of the extrusion protrusion 23 away from the slide rail 3 can be set to an arc or a rounded corner. The extrusion protrusion 23 is provided in plurality on the slide rail 3 and is distributed at equal distances.

[0047] As the slider 4 moves on the slide rail 3, the airbag 21 on the slider 4 is continuously squeezed by the squeezing protrusion 23 on the slide rail 3, so that the airbag 2 is compressed and then reset. The air pipe 22 is used to continuously discharge air to the outer surface of the slide rail 3, so that the airflow blows the injected lubricating oil evenly, so that the lubricating oil can be injected more evenly, thereby improving the lubrication effect of the slide rail 3 and the slider 4. The squeezing protrusion 23 with an arc or rounded design can protect the airbag 21 and prevent the sharp contact surface from scratching the airbag 21.

[0048] The slider 4 is also equipped with bristles 24 that fit with the outer side of the slide rail 3. The bristles 24 are arranged in two rows and are located on the left and right sides of the airbag 21. When the slider 4 reciprocates on the slide rail 3, the bristles 24 on both sides cooperate with each other. The bristles 24 on one side can clean the debris attached to the slide rail 3, and the bristles 24 on the other side can further brush the added lubricating oil evenly, so that the lubricating oil can be added more evenly.

[0049] There may be two or more mounting cavities 8 on the slide rail 3. When in use, the controller can be electrically connected to the cylinder 18 to control the operation of the cylinders 18 in the multiple mounting cavities 8. When the rebound performance of the connecting spring 17 is affected after repeated use, the degree of deformation of the oil bag 10 may be reduced, thereby resulting in a reduction in the amount of oil suction and injection. There are multiple mounting cavities 8, and the controller 18 can control the cylinder 18 in each mounting cavity 8 to squeeze the oil bag 10 for oil injection. When the amount of oil injected in a single mounting cavity 8 is reduced, the amount of oil injected in the mounting cavity 8 can be increased to improve the lubrication effect of the slide rail 3 and the slider 4.

Claims

1. An automatic lubrication device for a gantry machining center, comprising a base (1), a gantry machining device (2) located outside the base (1), a slide rail (3) mounted on the base (1), a slider (4) slidably mounted on the slide rail (3), an oil injection channel (5) provided on the slide rail (1), and an oil inlet pipe (6) and an oil outlet pipe (7) connected to the oil injection channel (5), characterized in that: The slide rail (3) is provided with an installation cavity (8) connected to the oil injection channel (5), and a lubrication component connected to the oil injection channel (5) is installed in the installation cavity (8). The lubrication component contacts the inner wall of the slider (4) and injects oil thereto. A control component for controlling the oil suction and oil injection of the lubrication component is also installed in the installation cavity (8). An air blowing component for blowing air toward the outer surface of the slide rail (3) is installed on the inner side of the slider (4), and an extrusion component for causing the air blowing component to blow air is installed on the slide rail (3).

2. The automatic lubrication device for a gantry machining center according to claim 1, characterized in that: The oil injection channel (5) is distributed in an S shape on the slide rail (3), and the two ends of the oil injection channel (5) are respectively connected to the oil inlet pipeline (6) and the oil outlet pipeline (7).

3. The automatic lubrication device for a gantry machining center according to claim 2, characterized in that: The lubrication assembly comprises a bracket (9) installed in the installation cavity (8), an oil bag (10) installed on the bracket (9), an oil inlet pipe (11) connecting the oil bag (10) and the oil injection channel (5), a one-way valve (12) installed on the oil inlet pipe (11), an oil outlet pipe (13) connected to the oil bag (10), and a sealing ball (14) rotatably connected to the oil outlet end of the oil outlet pipe (13) and in contact with the inner wall of the slider (4).

4. The automatic lubrication device for a gantry machining center according to claim 3, characterized in that: The oil outlet end of the oil outlet pipe (13) is in a closed shape, and an oil outlet hole matched with the blocking ball (14) is opened at the oil outlet end of the oil outlet pipe (13), and the blocking ball (14) is rotatably connected in the oil outlet hole.

5. The automatic lubrication device for a gantry machining center according to claim 4, characterized in that: The control assembly comprises a base plate (15) installed in the installation cavity (8), a pressure plate (16) slidably connected to the base plate (15) and respectively in contact with the two oil bags (10), a connecting spring (17) connecting the two pressure plates (16), a cylinder (18) installed on the inner wall of the installation cavity (8), and a push block (19) connected to the output end of the cylinder (18).

6. The automatic lubrication device for a gantry machining center according to claim 5, characterized in that: The opposite sides of the two pressing plates (16) are both inclined surfaces, and the front and rear sides of the push block (19) are in close contact with the pressing plates (16) and are arranged to be inclined surfaces that match the pressing plates (16). A limiting plate (20) is also installed on the bottom plate (15). When the pressing plates (16) are in contact with the limiting plate (20), the inclined surfaces on the push block (19) and the inclined surfaces on the pressing plates (16) are still in close contact with each other.

7. The automatic lubrication device for a gantry machining center according to claim 6, characterized in that: The blowing assembly comprises an air bag (21) mounted on the front and rear sides of the inner wall of the slider (4) and an air pipe (22) connected to the air bag (21), wherein the number of the air pipes (22) is two, and the two air pipes (22) are respectively directed towards the top and the side of the slide rail (3).

8. The automatic lubrication device for a gantry machining center according to claim 7, characterized in that: The extrusion assembly comprises an extrusion protrusion (23) mounted on the slide rail (3); a side of the extrusion protrusion (23) away from the slide rail (3) can be set to an arc or a rounded corner; a plurality of the extrusion protrusions (23) are arranged on the slide rail (3) and are distributed at equal distances.

9. The automatic lubrication device for a gantry machining center according to claim 8, characterized in that: The slider (4) is also provided with brushes (24) that are in contact with the outer side of the slide rail (3). The brushes (24) are arranged in two rows and are located on the left and right sides of the airbag (21).

10. The automatic lubrication device for a gantry machining center according to claim 9, characterized in that: Two or more installation cavities (8) may be provided on the slide rail (3), and when in use, the cylinders (18) in the plurality of installation cavities (8) may be controlled to operate by electrically connecting the controller to the cylinder (18).

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