Linear guide rail pair multi-section type braking device

Abstract

A linear guide rail pair multi-section type braking device comprises a guide rail and a sliding block matched with the guide rail. The braking cylinders are arranged on the two sides of the guide rail and can move along with the sliding block, the front pressing inner cavity and the rear pressing inner cavity are formed in the braking cylinders and do not communicate with each other, the front pressing piece is connected into the front pressing inner cavity in a sliding mode and abuts against the two sides of the guide rail in a pressing mode, and the front pressure applying part is used for applying pressure to the front pressing piece for the first time. One end of the rear pressing part is arranged in the rear pressing inner cavity, the other end of the rear pressing part penetrates into the front pressing inner cavity to abut against the front pressing part, the rear pressure applying part is arranged in the rear pressing inner cavity and can apply pressure to the front pressing part again through the rear pressing part, and the segmented braking part can sequentially drive the front pressure applying part and the rear pressure applying part to apply pressure to the front pressing part. According to the linear guide rail, the contact area of the clamping blocks and the guide rail is increased, a two-section braking mode is arranged, the situation that the clamping blocks generate large impact force on the guide rail during braking is effectively avoided, the service life of the linear guide rail is prolonged, and meanwhile the durability of the linear guide rail is improved.

Description

Technical Field

[0001] The invention relates to the technical field of linear guide rail braking, and in particular to a linear guide rail pair multi-stage braking device. Background Art

[0002] At present, the linear guide pair is composed of two parts: a guide rail and a slider. Longitudinal grooves are opened on both sides of the guide rail. The slider is sleeved on the outer side of the guide rail and slides with the longitudinal groove. The guide rail and the slider are often used in situations where linear reciprocating motion is required. The mutual cooperation between the guide rail and the slider can reduce friction as much as possible while guiding the movement of the equipment, and at the same time can bear a certain torque, and can achieve high-precision linear motion under high load conditions; currently, for the braking of the linear guide, usually clamps that can move with the slider are installed on both sides of the slider, and an oil circuit is arranged inside the clamp, and the oil circuit is arranged to be open at one end and sealed at the other end. The open end of the oil circuit is connected to an oil pump. When braking is required, the oil pump pumps hydraulic oil into the oil circuit, and the hydraulic oil generates high pressure in the oil circuit, forcing the clamp to bend and deform close to one end of the guide rail to clamp the guide rail, thereby braking the slider.

[0003] However, this traditional slider brake structure has two problems. The first problem is that since the clamping block clamps the guide rail by bending and deformation, the contact between the inner side of the clamping block and the guide rail is point contact rather than surface contact. Since the contact area of ​​the point contact is small, a large impact force will be generated on the surface of the guide rail during braking. Under the repeated impact of the impact force, the material on the surface of the guide rail is prone to fatigue and fall off, affecting the braking effect. In addition, due to the small contact area, a large impact force is also required to brake the slider. The second problem is that the method of braking by the clamping block will instantly apply the maximum pressure to the guide rail for braking. When the sliding speed of the slider is high, since the clamping block is in point contact with the guide rail, these two factors will cause the clamping block to hit the guide rail to form small pits, which will develop into sponge-like scars over time, thereby further weakening the braking effect. Summary of the invention

[0004] The present invention aims to solve the problems existing in the above-mentioned prior art and provides a multi-stage braking device for a linear guide pair, which increases the contact area between the clamping block and the guide rail and can perform adjustable two-stage braking. The clamping force of the first stage of braking is relatively small, which is used to allow the braking part to contact the guide rail and reduce the initial velocity. The clamping force of the second stage of braking is relatively large, which is used to completely brake the slider.

[0005] The technical solution adopted by the present invention to solve its technical problems is as follows: this linear guide pair multi-stage braking device includes a guide rail, a slider installed in cooperation with the guide rail; a brake cylinder arranged on both sides of the guide rail and capable of moving with the slider, a front pressure cavity and a rear pressure cavity arranged inside the brake cylinder and not connected to each other, a front pressure piece slidably connected inside the front pressure cavity and pressing against both sides of the guide rail, a front pressure part for initially applying pressure to the front pressure piece, a rear pressure piece with one end arranged in the rear pressure cavity and the other end penetrating into the front pressure cavity to press against the front pressure piece, a rear pressure part arranged in the rear pressure cavity and capable of applying pressure to the front pressure piece again through the rear pressure piece, and a segmented brake piece which can successively drive the front pressure part and the rear pressure part to apply pressure to the front pressure piece.

[0006] For further improvement, the front pressure piece includes a front pressure plate sealingly and slidingly connected to the front pressure cavity, a clamping arm rod fixed on the front pressure plate and passing through the front end of the front pressure cavity, and the clamping arm rod presses on both sides of the guide rail.

[0007] To be further improved, the front pressure-applying part includes a push plate slidably connected to the inside of the front pressure inner cavity, a front pressure plunger sealingly and slidably connected to the inside of the front pressure inner cavity and located between the push plate and the front pressure plate, a pressure space formed between the front pressure plunger and the front pressure plate, and a front pressure spring installed between the push plate and the front pressure plunger. The push plate can indirectly push the front pressure plunger to compress the gas in the pressure space through the front pressure spring to apply pressure to the front pressure plate. A ventilation groove is provided on the push plate to facilitate its sliding in the front pressure inner cavity, and a ventilation port is opened at the top of the front pressure inner cavity and located behind the front pressure plunger.

[0008] Further improvement, the rear pressure piece is a cylinder, the rear pressure piece axially passes through the center of the push plate and the front pressure plunger and supports the front pressure plate, the rear pressure piece is slidingly connected with the push plate and the front pressure plunger, and the rear pressure piece is surrounded by the front pressure spring.

[0009] To further improve, the rear pressure-applying part includes a rear pressure plate that is sealingly and slidably connected inside the rear pressure inner cavity, the rear pressure plate is fixedly connected to one end of the rear pressure member located inside the rear pressure inner cavity, hydraulic oil is filled between the rear pressure plate and the inner wall at the rear end of the rear pressure inner cavity, a rear pressure plunger immersed in the hydraulic oil is slidingly connected inside the rear pressure inner cavity, an oil passage groove that passes through the rear pressure plunger in an axial direction is provided, and pressure is applied to the rear pressure plate through the hydraulic oil when the rear pressure plunger slides, and the hydraulic oil flows in the rear pressure inner cavity through the oil passage groove, a rear push rod that passes through the rear end of the rear pressure inner cavity and is sealingly and slidably connected is fixedly installed at the rear end of the rear pressure plunger, a reset plate is fixedly installed at the rear end of the rear push rod, and a reset spring that is fixedly connected to the reset plate is fixedly installed at the rear end of the brake cylinder.

[0010] To be further improved, the segmented brake component includes a mounting plate fixed on the outside of the brake cylinder, a cylinder fixed on the mounting plate, a linkage plate fixedly connected to the cylinder piston rod, a linkage rod fixed on the linkage plate and passing through the rear pressure inner cavity and the front pressure inner cavity and fixedly connected to the push plate, the linkage rod passes through the rear pressure plunger and the rear pressure plate and is slidably connected to the two.

[0011] To further improve, a front pressure adjusting part for adjusting the pressure applied by the front pressure part to the front pressure piece is provided in the front pressure inner cavity, the front pressure adjusting part includes an adjusting opening opened at the top of the front pressure inner cavity and located between the push plate and the front pressure plunger, an adjusting block slidably connected to the inner wall of the adjusting opening, and a limiting inclined surface provided at the bottom of the adjusting block and used for the sliding of the front pressure plunger. The adjusting block adjusts the height of the limiting inclined surface by sliding to limit the maximum sliding distance of the front pressure plunger.

[0012] For further improvement, a screw is rotatably connected to the top of the brake cylinder, a lifting plate is threadedly connected to the outer side of the screw, the lifting plate is fixedly connected to the adjusting block, and the screw can drive the adjusting block to rise and fall by rotating.

[0013] To further improve, a rear pressure adjusting part for adjusting the pressure applied by the rear pressure part to the front pressure part is provided inside the rear pressure inner cavity, the rear pressure adjusting part includes an adjusting block arranged inside the rear pressure inner cavity and located in the oil passage groove, the adjusting block controls the flow of hydraulic oil flowing through the oil passage groove by rotation, an adjusting shaft passing through the top of the rear pressure inner cavity is fixedly installed on the top of the adjusting block, a spiral groove is provided on the outside of the adjusting shaft, an adjusting sleeve is slidably connected to the outside of the adjusting shaft, the inner wall of the adjusting sleeve is provided with a protrusion cooperating with the spiral groove, the protrusion drives the adjusting shaft to rotate by sliding along the spiral groove.

[0014] For further improvement, a fixing bracket fixedly connected to the sliding block is fixedly installed on the outer side of the brake cylinder.

[0015] The beneficial effects of the present invention are as follows: the present invention increases the contact area between the clamp and the guide rail, and sets a two-stage braking method, which effectively avoids the clamp generating a large impact force on the guide rail during braking, and extends the service life of the linear guide without significantly increasing the braking time and braking distance, while also increasing the durability of the linear guide. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a structural schematic diagram of the present invention;

[0017] Figure 2 It is the axonometric cross-sectional view of the brake cylinder;

[0018] Figure 3 It is a structural schematic diagram of a front pressure piece, a front pressure-applying portion, a rear pressure piece, a rear pressure-applying portion, a segmented brake piece, and a front pressure-adjusting portion;

[0019] Figure 4 It is a structural schematic diagram of the rear pressure regulating part;

[0020] Figure 5 It is a structural schematic diagram of the oil passage groove and the regulating block;

[0021] Figure 6Schematic diagram of the linkage plate pushing the forward pressure plunger.

[0022] Description of the accompanying drawings: guide rail 1, slider 2, brake cylinder 3, front pressure cavity 4, rear pressure cavity 5, front pressure piece 6, front pressure plate 6-1, clamp arm rod 6-2, front pressure portion 7, push plate 7-1, front pressure plunger 7-2, pressure space 7-3, front pressure spring 7-4, ventilation groove 7-5, ventilation port 7-6, rear pressure piece 8, rear pressure portion 9, rear pressure plate 9-1, rear pressure plunger 9-2, oil passage groove 9-3, rear push rod 9-4, reset plate 9-5, reset Position spring 9-6, segmented brake 10, mounting plate 10-1, cylinder 10-2, linkage plate 10-3, linkage rod 10-4, front pressure adjustment part 11, adjustment opening 11-1, adjustment block 11-2, limiting inclined surface 11-3, screw 11-4, lifting plate 11-5, rear pressure adjustment part 12, adjustment block 12-1, adjustment shaft 12-2, spiral groove 12-3, adjustment sleeve 12-4, protrusion 12-5, fixing bracket 13. DETAILED DESCRIPTION

[0023] The following provides a preferred specific implementation of the present invention in conjunction with the accompanying drawings. What is disclosed is only a preferred specific implementation of the present invention, and it is certainly not intended to limit the scope of rights of the new use model. Therefore, equivalent changes made according to the claims of the present invention are still within the scope covered by the present invention.

[0024] Refer to the attached Figures 1 to 6 : In this embodiment, the linear guide multi-stage braking device includes a guide rail 1, a slider 2 is slidably connected to the outer side of the guide rail 1, a groove is provided on the outer side of the guide rail 1, and an inner wall of the slider 2 is provided with an inner protrusion that cooperates with the groove of the guide rail 1 to achieve sliding on the guide rail 1, brake cylinders 3 are provided on both sides of the guide rail 1, and a fixed bracket 13 fixedly connected to the slider 2 is fixedly installed on the outer side of the brake cylinder 3. The brake cylinder 3 slides with the slider 2 through the fixed bracket 13, and a front pressure inner cavity 4 and a rear pressure inner cavity 5 are provided inside the brake cylinder 1. The front pressure inner cavity 4 and the rear pressure inner cavity 5 are arranged to be disconnected from each other. The front pressure inner cavity 4 is closer to the guide rail 1 than the rear pressure inner cavity 5, and the front pressure inner cavity 4 is sealed and slidably connected to A front pressure piece 6, one end of which presses on the grooves on both sides of the guide rail 1, a front pressure portion 7 for applying pressure to the front pressure piece 6 for the first time is provided inside the front pressure inner cavity 4, and a rear pressure piece 8 is cooperated with the front pressure piece 6, one end of the rear pressure piece 8 is provided in the rear pressure inner cavity 5, and the other end penetrates into the front pressure inner cavity 4 to support the front pressure piece 6, a rear pressure portion 9 is provided inside the rear pressure inner cavity 5, and the rear pressure portion 9 can apply pressure to the front pressure piece 6 for the second time through the rear pressure piece 8, and a segmented brake member 10 is cooperated with the front pressure piece 6 and the rear pressure piece 8, and the segmented brake member 10 is used to first drive the front pressure portion 7 to apply pressure to the front pressure piece 6 for the first time, and then drive the rear pressure portion 9 to apply pressure to the front pressure piece 6 for the second time.

[0025] Refer to the attached Figures 1 to 6 The front pressure member 6 includes a front pressure plate 6-1 which is sealingly and slidably connected to the interior of the front pressure cavity 4, a clamp arm rod 6-2 which is fixed on the front pressure plate 6-1 and passes through the front end of the front pressure cavity 4, the clamp arm rod 6-2 is cylindrical, and the end of the clamp arm rod 6-2 which contacts the groove of the guide rail 1 is a plane setting, and the clamp arm rod 6-2 is in surface contact with the groove of the guide rail 1, and the clamp arm rod 6-2 presses on both sides 1 of the guide rail, and the front pressure plate 6-1 is set to have a certain distance from the inner wall of the front end of the front pressure cavity 4. Although the clamp arm rod 6-2 presses on both sides 1 of the guide rail However, the front pressure plate 6-1 will still move a small distance when receiving pressure. In order to prevent the front end inner wall of the front pressure cavity 4 from hindering the pressure application, the front pressure plate 6-1 needs to be set to maintain a certain distance from the front end inner wall of the front pressure cavity 4. An opening with a diameter larger than the clamp arm rod 6-2 is provided on the front end inner wall of the front pressure cavity 4 to allow the clamp arm rod 6-2 to pass through. The purpose is to prevent a very small amount of gas from being retained between the front pressure plate 6-1 and the front end inner wall of the front pressure cavity 4, thereby hindering the small movement of the front pressure plate 6-1.

[0026] Refer to the attached Figures 1 to 6 The front pressure-applying part 7 includes a push plate 7-1 slidably connected to the front pressure inner cavity 4, a front pressure plunger 7-2 sealingly slidably connected to the front pressure inner cavity 4 and located between the push plate 7-1 and the front pressure plate 6-1, a pressure space 7-3 formed between the front pressure plunger 7-2 and the front pressure plate 6-1, and a front pressure spring 7-4 installed between the push plate 7-1 and the front pressure plunger 7-2. The push plate 7-1 can indirectly push the front pressure plunger 7-2 to compress the gas in the pressure space 7-3 through the front pressure spring 7-4 to apply pressure to the front pressure plate 6-1. The push plate 7-1 is provided with a ventilation groove 7-5 for facilitating its sliding in the front pressure inner cavity 4. The top of the front pressure inner cavity 4 is provided with a ventilation port 7-6 located behind the front pressure plunger 7-2. The purpose of setting the ventilation groove 7-5 is to In order to prevent the push plate 7-1 from compressing the air between the front pressure plunger 7-2 and the push plate 7-1 and allow the push plate 7-1 to slide smoothly, the purpose of setting the vent 7-6 is to balance the air pressure between the front pressure plunger 7-2 and the push plate 7-1. Since the subsequent linkage rod 10-4 will occupy a part of the space between the front pressure plunger 7-2 and the push plate 7-1 when pushing the push plate 7-1 again, in order to prevent the pressure between the front pressure plunger 7-2 and the push plate 7-1 from increasing, a vent 7-6 connected to the outside is set; the rear pressure piece 8 is a cylinder, the rear pressure piece 8 axially passes through the center of the push plate 7-1 and the front pressure plunger 7-2 and supports the front pressure plate 6-1, the rear pressure piece 8 is slidably connected to the push plate 7-1 and the front pressure plunger 7-2, and the rear pressure piece 8 is surrounded by the front pressure spring 7-4.

[0027] Refer to the attached Figures 1 to 6: The rear pressure-applying portion 9 includes a rear pressure plate 9-1 that is sealingly and slidably connected inside the rear pressure inner cavity 5. The rear pressure plate 9-1 is fixedly connected to one end of the rear pressure member 8 located inside the rear pressure inner cavity 5. Hydraulic oil is filled between the rear pressure plate 9-1 and the inner wall at the rear end of the rear pressure inner cavity 5. The amount of hydraulic oil filled is approximately three-fifths to four-fifths. A certain amount of air needs to be left because the subsequent push rod 9-4 extending into the rear pressure inner cavity 5 will occupy a part of the space. If the hydraulic oil is completely filled, the push rod 9-4 cannot be inserted. A rear pressure plunger 9-2 immersed in the hydraulic oil is slidably connected inside the rear pressure inner cavity 5. The rear pressure plunger 9-2 is provided with an oil path groove 9-3 that runs through the axial direction. When the rear pressure plunger 9-2 slides, pressure is applied to the rear pressure plate 9-1 through the hydraulic oil. The hydraulic oil passes through the oil The oil passage groove 9-3 flows in the rear pressure cavity 5, and the hydraulic oil between the rear pressure plate 9-1 and the rear pressure plunger 9-2 slides with the rear pressure plunger 9-2, and flows from the oil passage groove 9-3 to between the rear pressure plunger 9-2 and the rear end inner wall of the rear pressure cavity 5, and the rear end of the rear pressure plunger 9-2 is fixedly installed with a rear push rod 9-4 that passes through the rear end of the rear pressure cavity 5 and is sealed and slidably connected, and the rear end of the rear push rod 9-4 is fixed with a reset plate 9-5, and the rear end of the brake cylinder 1 is fixedly installed with a reset spring 9-6 that is fixedly connected to the reset plate 9-5. The function of the reset spring 9-6 is to reset the rear pressure plunger 9-2 and return the hydraulic oil between the rear pressure plunger 9-2 and the rear end inner wall of the rear pressure cavity 5 through the oil passage groove 9-3 to between the rear pressure plunger 9-2 and the rear pressure plate 9-1.

[0028] Refer to the attached Figures 1 to 6 The segmented brake component 10 includes a mounting plate 10-1 fixed to the outside of the brake cylinder 1, a cylinder 10-2 fixed on the mounting plate 10-1, a linkage plate 10-3 fixedly connected to the piston rod of the cylinder 10-2, and a linkage rod 10-4 fixed on the linkage plate 10-3 and passing through the rear pressure cavity 5 and the front pressure cavity 4 and fixedly connected to the push plate 7-1. The linkage rod 10-4 passes through the rear pressure plunger 9-2 and the rear pressure plate 9-1 and is slidably connected to the two.

[0029] Refer to the attached Figures 1 to 6The front pressure inner cavity 4 is provided with a front pressure regulating part 11 for regulating the pressure size of the front pressure applying part 7 on the front pressure member 6. The front pressure regulating part 11 includes an regulating opening 11-1 opened at the top of the front pressure inner cavity 4 and located between the push plate 7-1 and the front pressure plunger 7-2, an regulating stopper 11-2 slidably connected to the inner wall of the regulating opening 11-1, and a limiting inclined surface 11-3 provided at the bottom of the regulating stopper 11-2 and used to block the sliding of the front pressure plunger 7-2. The end of the front pressure plunger 7-2 used for contacting with the limiting inclined surface 11-3 is provided with a chamfered surface matched with the limiting inclined surface 11-3, and the inclination angle of the chamfered surface is the same as the angle of the limiting inclined surface 11-3. The height of the limiting slope 11-3 is adjusted by sliding to adjust the height of the limiting slope 11-3 to limit the maximum sliding distance of the front pressure plunger 7-2. The greater the distance the adjusting block 11-2 descends, the shorter the distance the front pressure plunger 7-2 can move, and the smaller the degree of air compression in the pressure space 7-3. A screw 11-4 is rotatably connected to the top of the brake cylinder 3, and a lifting plate 11-5 is threadedly connected to the outer side of the screw 11-4. The lifting plate 11-5 is fixedly connected to the adjusting block 11-2, and the screw 11-4 can drive the adjusting block 11-2 to rise and fall by rotation.

[0030] Refer to the attached Figures 1 to 6 : A rear pressure regulating part 12 for regulating the pressure applied by the rear pressure-applying part 9 to the front pressure piece 6 is provided inside the rear pressure inner cavity 5. The rear pressure regulating part 12 includes an regulating block 12-1 arranged inside the rear pressure inner cavity 5 and located in the oil passage groove 9-3. The regulating block 12-1 is elliptical, and the diameter of the long side of the ellipse of the regulating block 12-1 just matches the width of the oil passage groove 9-3. The regulating block 12-1 controls the flow of hydraulic oil passing through the oil passage groove 9-3 by rotation. An adjusting shaft 12-2 passing through the top of the rear pressure inner cavity 5 is fixedly installed on the top of the regulating block 12-1. A spiral groove 12-3 is provided on the outer side of the adjusting shaft 12-2. An adjusting sleeve 12-4 is slidably connected to the outer side of the adjusting shaft 12-2. A convex block 12-5 matching the spiral groove 12-3 is provided on the inner wall of the adjusting sleeve 12-4. The convex block 12-5 drives the adjusting shaft 12-2 to rotate by sliding along the spiral groove 12-3.

[0031] When in use, the piston rod of the cylinder 10-2 contracts to drive the linkage plate 10-3 to move. When the linkage plate 10-3 moves, the first braking is performed first, that is, the push plate 7-1 is pushed to slide through the linkage rod 10-4, and the push plate 7-1 pushes the front pressure plunger 7-2 to slide through the front pressure spring 7-4. The front pressure plunger 7-2 indirectly presses the front pressure plate 6-1 by compressing the air inside the pressure space 7-3. The degree to which the front pressure plunger 7-2 compresses the air depends on the height of the adjustment block 11-2. The front pressure plunger 7-2 will slide until it contacts the limiting inclined surface 11-3 and stop. The front pressure plate 6-1 transmits the force to the clamp arm rod 6-2, and the clamp arm The rod 6-2 applies the first pressure to both sides of the guide rail 1 for braking, the purpose is to make the clamp arm rod 6-2 fully close to the outer side of the guide rail 1 and reduce the speed of the slider 2 to a certain extent, the piston rod of the cylinder 10-2 continues to contract to drive the linkage plate 10-3 to continue to move, the linkage plate 10-3 begins to push the rear push rod 9-4 to slide, the rear push rod 9-4 pushes the rear pressure plunger 9-2 to slide, the rear pressure plunger 9-2 will use the hydraulic oil between the rear pressure plunger 9-2 and the rear pressure plate 9-1 as the medium to apply pressure to the rear pressure plate 9-1, the rear pressure plate 9-1 will transfer the force to the front pressure plate 6-1 through the rear pressure piece 8, the front pressure plate 6-1 will The force is transmitted to the clamp arm rod 6-2, and the clamp arm rod 6-2 applies pressure to both sides of the guide rail 1 for the second time. The pressure applied for the second time is greater than the pressure applied for the first time, and braking is performed. When the rear pressure plunger 9-2 slides, the hydraulic oil between the rear pressure plunger 9-2 and the rear pressure plate 9-1 will flow through the oil passage groove 9-3 to between the rear pressure plunger 9-2 and the rear end inner wall of the rear pressure inner cavity 5. When the hydraulic oil between the rear pressure plunger 9-2 and the rear pressure plate 9-1 completely flows to between the rear pressure plunger 9-2 and the rear end inner wall of the rear pressure inner cavity 5, the rear pressure plunger 9-2 will contact the rear pressure plate 9-1 and apply pressure to it, and the rear pressure plate 9-1 will transmit the force to the front pressure piece 8 through the rear pressure piece 8. The pressure plate 6-1 and the front pressure plate 6-1 transmit the force to the clamp arm rod 6-2, and the clamp arm rod 6-2 applies pressure to both sides of the guide rail 1 for the third time. The pressure applied for the third time is greater than the pressure applied for the second time. The pressure applied for the third time is not necessary. The contraction length of the piston rod of the cylinder 10-2 can also be set so that the rear pressure plunger 9-2 does not contact the rear pressure plate 9-1, thereby not performing the step of applying pressure for the third time. The flow rate of the oil circuit groove 9-3 can be changed by rotating the adjustment block 12-1. By changing the flow rate of the oil circuit groove 9-3, the pressure applied by the rear pressure plunger 9-2 to the rear pressure plate 9-1 through the hydraulic oil can be controlled.

[0032] When the front pressure plate 6-1 applies pressure for the second and third time, it will drive the push plate 7-1 to compress the front pressure spring 4. However, at this time, since the front pressure plunger 7-2 has been blocked by the adjustment block 11-2, the front pressure spring 4 cannot push the adjustment block 11-2 and can only compress itself to provide space for the movement of the front pressure plate 6-1.

[0033] When facing sliders 2 of different speeds, the pressure of the first braking and the second braking can be adjusted at the same time. First, the screw 11-4 is rotated to drive the lifting plate 11-5 to rise and fall. The lifting and falling of the lifting plate 11-5 drives the adjusting block 11-2 and the adjusting sleeve 12-4 to descend at the same time. The greater the distance the adjusting block 11-2 descends, the shorter the distance the front pressure plunger 7-2 can slide, and thus the compression degree of the air inside the pressure space 7-3 by the front pressure plunger 7-2 is smaller. The smaller the compression degree of the air inside the pressure space 7-3, the smaller the pressure applied to the front pressure piece 6. When the adjusting sleeve 12-4 descends, the spiral groove 12-3 and the protrusion 12-5 are cooperated to drive the rotation of the adjusting shaft 12-2. The rotation of the adjusting shaft 12-2 drives the adjusting block 12-1 to rotate. The adjusting block 12-1 increases the flow of hydraulic oil through the oil passage groove 9-3 by rotation, thereby reducing the pressure during the second braking.

[0034] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A linear guide multi-stage brake device, comprising a guide rail (1) and a slider (2) mounted in cooperation with the guide rail (1); characterized in that: A brake cylinder (3) is arranged on both sides of the guide rail (1) and can move with the slider (2); a front pressure cavity (4) and a rear pressure cavity (5) are arranged inside the brake cylinder (1) and are not connected to each other; a front pressure piece (6) is slidably connected inside the front pressure cavity (4) and presses against both sides of the guide rail (1); a front pressure part (7) is used to initially apply pressure to the front pressure piece (6); a rear pressure piece (8) one end of which is arranged in the rear pressure cavity (5) and the other end of which penetrates into the front pressure cavity (4) to press against the front pressure piece (6); a rear pressure part (9) is arranged inside the rear pressure cavity (5) and can apply pressure to the front pressure piece (6) again through the rear pressure piece (8); and a segmented brake piece (10) can successively drive the front pressure part (7) and the rear pressure part (9) to apply pressure to the front pressure piece (6).

2. The linear guide multi-stage brake device according to claim 1 is characterized in that: The front pressure member (6) comprises a front pressure plate (6-1) sealingly and slidably connected to the interior of the front pressure inner cavity (4), and a clamping arm rod (6-2) fixed to the front pressure plate (6-1) and passing through the front end of the front pressure inner cavity (4), wherein the clamping arm rod (6-2) presses against both sides of the guide rail (1).

3. The linear guide multi-stage brake device according to claim 2 is characterized in that: The front pressure-applying part (7) comprises a push plate (7-1) slidably connected to the interior of the front pressure inner cavity (4), a front pressure plunger (7-2) sealingly slidably connected to the interior of the front pressure inner cavity (4) and located between the push plate (7-1) and the front pressure plate (6-1), a pressure space (7-3) formed between the front pressure plunger (7-2) and the front pressure plate (6-1), and a front pressure spring (7-4) installed between the push plate (7-1) and the front pressure plunger (7-2). The push plate (7-1) can indirectly push the front pressure plunger (7-2) to compress the gas in the pressure space (7-3) through the front pressure spring (7-4) to apply pressure to the front pressure plate (6-1). The push plate (7-1) is provided with a ventilation groove (7-5) for facilitating its sliding in the front pressure inner cavity (4). The top of the front pressure inner cavity (4) is provided with a ventilation port (7-6) located behind the front pressure plunger (7-2).

4. The linear guide multi-stage brake device according to claim 3 is characterized in that: The rear pressure piece (8) is a cylinder, and the rear pressure piece (8) axially passes through the center of the push plate (7-1) and the front pressure plunger (7-2) and presses against the front pressure plate (6-1). The rear pressure piece (8) is slidably connected to the push plate (7-1) and the front pressure plunger (7-2), and the rear pressure piece (8) is surrounded by the front pressure spring (7-4).

5. The linear guide multi-stage brake device according to claim 1 is characterized in that: The rear pressure-applying portion (9) comprises a rear pressure plate (9-1) sealingly and slidably connected inside the rear pressure inner cavity (5); the rear pressure plate (9-1) is fixedly connected to one end of the rear pressure member (8) located inside the rear pressure inner cavity (5); hydraulic oil is filled between the rear pressure plate (9-1) and the rear end inner wall of the rear pressure inner cavity (5); a rear pressure plunger (9-2) immersed in the hydraulic oil is slidably connected inside the rear pressure inner cavity (5); an oil passage groove (9-3) penetrating in the axial direction is provided on the rear pressure plunger (9-2); When the rear pressure plunger (9-2) slides, pressure is applied to the rear pressure plate (9-1) through hydraulic oil, and the hydraulic oil flows in the rear pressure inner cavity (5) through the oil passage groove (9-3). A rear push rod (9-4) passing through the rear end of the rear pressure inner cavity (5) and sealingly slidably connected is fixedly installed at the rear end of the rear pressure plunger (9-2), and a reset plate (9-5) is fixedly installed at the rear end of the rear push rod (9-4). A reset spring (9-6) fixedly connected to the reset plate (9-5) is fixedly installed at the rear end of the brake cylinder (1).

6. The linear guide multi-stage brake device according to claim 5 is characterized in that: The segmented brake component (10) comprises a mounting plate (10-1) fixed on the outside of the brake cylinder (1), a cylinder (10-2) fixed on the mounting plate (10-1), a linkage plate (10-3) fixedly connected to the piston rod of the cylinder (10-2), and a linkage rod (10-4) fixed on the linkage plate (10-3) and passing through the rear pressure inner cavity (5) and the front pressure inner cavity (4) and fixedly connected to the push plate (7-1); the linkage rod (10-4) passes through the rear pressure plunger (9-2) and the rear pressure plate (9-1) and is slidably connected to the two.

7. The linear guide multi-stage brake device according to claim 3 is characterized in that: The front pressure inner cavity (4) is provided with a front pressure regulating portion (11) for regulating the pressure applied by the front pressure applying portion (7) to the front pressure member (6). The front pressure regulating portion (11) comprises an regulating opening (11-1) opened at the top of the front pressure inner cavity (4) and located between the push plate (7-1) and the front pressure plunger (7-2), an regulating block (11-2) slidably connected to the inner wall of the regulating opening (11-1), and a limiting inclined surface (11-3) provided at the bottom of the regulating block (11-2) and used to block the sliding of the front pressure plunger (7-2). The regulating block (11-2) adjusts the height of the limiting inclined surface (11-3) by sliding to limit the maximum sliding distance of the front pressure plunger (7-2).

8. The linear guide multi-stage brake device according to claim 7 is characterized in that: The top of the brake cylinder (3) is rotatably connected to a screw rod (11-4), the outer side of the screw rod (11-4) is threadedly connected to a lifting plate (11-5), the lifting plate (11-5) is fixedly connected to the adjustment block (11-2), and the screw rod (11-4) can drive the adjustment block (11-2) to rise and fall by rotating.

9. The linear guide multi-stage brake device according to claim 8, characterized in that: The rear pressure inner cavity (5) is provided with a rear pressure regulating part (12) for regulating the pressure applied by the rear pressure applying part (9) to the front pressure member (6). The rear pressure regulating part (12) comprises a regulating block (12-1) arranged in the rear pressure inner cavity (5) and located in the oil passage groove (9-3). The regulating block (12-1) controls the flow of hydraulic oil flowing through the oil passage groove (9-3) by rotating. A hydraulic oil pump (12-1) is fixedly mounted on the top of the regulating block (12-1) and passes through the rear pressure applying part (9). An adjusting shaft (12-2) is arranged at the top of the inner cavity (5), a spiral groove (12-3) is arranged on the outer side of the adjusting shaft (12-2), an adjusting sleeve (12-4) is slidably connected to the outer side of the adjusting shaft (12-2), a convex block (12-5) matching with the spiral groove (12-3) is arranged on the inner wall of the adjusting sleeve (12-4), and the convex block (12-5) drives the adjusting shaft (12-2) to rotate by sliding along the spiral groove (12-3).

10. The linear guide multi-stage brake device according to claim 1, characterized in that: A fixing bracket (13) fixedly connected to the sliding block (2) is fixedly mounted on the outer side of the brake cylinder (3).

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