Hydrostatic guideway structure and beam slide structure

Abstract

A hydrostatic guide rail structure, belonging to the technical field of heavy-duty vertical lathes, includes a fixed part and a sliding part. The fixed part includes a fixed assembly, a guide rail plate, and a hydrostatic system. A guide rail is formed on one side of the sliding part. The guide rail plate is fixed to the fixed assembly, and the guide rail is attached to the guide rail plate. The guide rail plate has a hydrostatic cavity, which is connected to the hydrostatic system. The fixed assembly includes a fixing member, a first pressure plate, and a second pressure plate. The first pressure plate and the second pressure plate are fixed to the fixing member. The first guide rail is attached to the first pressure plate and the fixing member, and the second guide rail is attached to the second pressure plate and the fixing member. The first pressure plate presses against the fixing member from top to bottom, and the second pressure plate engages with the fixing member via a keyway. The advantage of this invention is that a hydrostatic oil film is formed between the fixed assembly and the guide rail of the sliding part. Through the structural design of the first and second pressure plates, deformation of the first and second pressure plates due to hydrostatic pressure is avoided, which could damage the stability of the hydrostatic oil film and improve the machine tool accuracy.

Description

Technical Field

[0001] This utility model relates to the field of heavy-duty vertical machine tool technology, and in particular to a hydrostatic guide rail structure and a crossbeam slide structure. Background Technology

[0002] In order to ensure the motion accuracy of heavy-duty vertical machine tools, hydrostatic guideways are often used. Hydrostatic technology uses the static pressure of liquid to support the load-bearing object. By introducing lubricating fluid between the guideway surfaces, pure liquid friction is created between the guideway surfaces, which improves the accuracy of the guideway movement.

[0003] The existing vertical machine tool's crossbeam slide structure uses a pressure plate to install the crossbeam onto the slide. When the crossbeam is subjected to heavy-load cutting, the screws fixing the pressure plate are prone to deformation due to stress. Under the action of static pressure, the gap between the pressure plate and the slide will increase, thereby increasing the static pressure oil film, leading to static pressure failure and affecting the machine tool's accuracy. Utility Model Content

[0004] To address the shortcomings of existing technologies, the purpose of this utility model is to provide a hydrostatic guide rail structure and a crossbeam slide structure, the technical solution of which is as follows:

[0005] A hydrostatic guide rail structure includes a fixed part and a sliding part. The fixed part includes a fixed component, a guide rail plate, and a hydrostatic system. One side of the sliding part extends to form a guide rail. The guide rail plate is fixed to the fixed component and the guide rail is in contact with the guide rail surface of the guide rail plate. The guide rail plate has a hydrostatic cavity that communicates with the hydrostatic system, thereby forming a hydrostatic oil film between the guide rail and the guide rail plate. The fixed component includes a fixing member, a first pressure plate, and a second pressure plate. The guide rail includes a first guide rail and a second guide rail. The first pressure plate and the second pressure plate are fixed to the fixing member. The first guide rail is in contact with the first pressure plate and the fixing member on both sides. The second guide rail is in contact with the second pressure plate and the fixing member on both sides. The first pressure plate presses against the fixing member from top to bottom. The second pressure plate engages with the keyway of the fixing member and is vertically embedded in the fixing member.

[0006] Furthermore, the hydrostatic system includes a motor, an oil suction filter, a gear pump, a filter, and a capillary damping tube. The motor and the gear pump are electrically connected. The oil suction filter, the gear pump, and the filter are sequentially arranged on the main oil line. The hydrostatic oil enters the capillary damping tube through the filter. There are multiple capillary damping tubes, and each capillary damping tube is connected to one of the hydrostatic chambers.

[0007] A crossbeam slide structure includes the hydrostatic guide rail structure described in any one of the above claims. The fixing member is a slide, and the sliding part is a crossbeam. The slide includes a first part, a second part, and a third part, which are parallel to each other and arranged sequentially from top to bottom. The first pressure plate is fixed to the end face of the first part, and the second pressure plate is fixed to the side of the third part.

[0008] Furthermore, the crossbeam slide structure also includes a first screw, the edge of the first pressure plate forms a pressing part, the first screw horizontally fixes the first pressure plate and the first split body, and the pressing part presses against the first split body from top to bottom.

[0009] Furthermore, the crossbeam slide structure also includes a second screw, and the bottom protrusion of the second pressure plate forms a mounting key. The mounting key is embedded in the third part, and the second screw fixes the second pressure plate and the third part from bottom to top.

[0010] Furthermore, the crossbeam also includes a main body and a connecting part. The main body extends a first connecting part and a second connecting part to one side of the guide rail. The first guide rail is located at the end of the first connecting part, and the second guide rail is located at the end of the second connecting part.

[0011] Furthermore, the second guide rail is attached to the side of the second pressure plate, the upper surface of the third split, and the side of the slide, and the upper surface of the second connecting part is attached to the lower surface of the second split.

[0012] Furthermore, the first guide rail and the second guide rail are arranged vertically, and there are multiple guide rail plates. The guide rail plates include a first guide rail plate, a second guide rail plate, a third guide rail plate, a fourth guide rail plate, a fifth guide rail plate, and a sixth guide rail plate. The first guide rail plate is located at the contact surface between the first pressure plate and the first guide rail. The second guide rail plate is located at the contact surface between the slide and the first guide rail. The third guide rail plate is located at the contact surface between the second split body and the second connecting part. The fourth guide rail plate is located at the contact surface between the slide and the second guide rail. The fifth guide rail plate is located at the contact surface between the third split body and the second guide rail. The sixth guide rail plate is located at the contact surface between the second pressure plate and the second guide rail.

[0013] Furthermore, the crossbeam slide structure also includes a strip assembly, which includes a first strip and a second strip. The first strip is disposed on the contact surface between the second guide rail and the second pressure plate, and the second strip is disposed on the contact surface between the second guide rail and the second pressure plate. The first strip abuts against the sixth guide rail plate, and the second strip abuts against the fifth guide rail plate.

[0014] Furthermore, the insert assembly also includes multiple insert covers, one of which fixes the first insert to the second pressure plate, and another insert cover fixes the second insert to the contact surface of the third component.

[0015] The advantages of this utility model are:

[0016] A static pressure oil film is formed between the slide assembly and the guide rail. Through the structural design of the first pressure plate and the second pressure plate, the deformation of the first pressure plate and the second pressure plate caused by the static pressure oil film and the load of the crossbeam is reduced, so as to avoid the deformation of the first pressure plate and the second pressure plate from destroying the stability of the static pressure oil film and maintaining the accuracy of the machine tool. Attached Figure Description

[0017] Figure 1 This is a cross-sectional schematic diagram of the crossbeam slide structure of this utility model;

[0018] Figure 2 for Figure 1 A partial enlarged view of the crossbeam slide structure;

[0019] Figure 3 for Figure 1 A partial enlarged view B of the crossbeam slide structure;

[0020] Figure 4 for Figure 1 Another cross-sectional view of the beam-slide structure;

[0021] Figure 5 for Figure 1 Another cross-sectional view of the beam-slide structure;

[0022] Figure 6 This is a schematic diagram of the oil circuit of the hydrostatic system for a hydrostatic guide rail structure.

[0023] In the diagram: 1. Slide; 11. First split part; 12. Second split part; 13. Third split part; 2. Crossbeam; 21. Main body; 22. First connecting part; 221. First guide rail; 23. Second connecting part; 231. Second guide rail; 3. First pressure plate; 31. Pressing part; 4. Second pressure plate; 41. Mounting key; 5. Inlay assembly; 51. First inlay; 52. Second inlay; 53. Inlay cover; 6. Guide rail plate; 61. First guide rail plate; 62. Second guide rail plate; 63. Third guide rail plate; 64. Fourth guide rail plate; 65. Fifth guide rail plate; 66. Sixth guide rail plate; 7. First screw; 8. Second screw; 9. Static pressure system; 91. Motor; 92. Oil suction filter; 93. Gear pump; 94. Filter; 95. Capillary damping tube; 96. Overflow valve; 97. Pressure buffer; 98. Pressure gauge. Detailed Implementation

[0024] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0025] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The term "and / as well" as used herein includes any and all combinations of one or more of the associated listed items.

[0026] The following describes the embodiments in conjunction with the appendix. Figure 1-6 This utility model will be described in further detail.

[0027] A hydrostatic guide rail structure includes a slide assembly, a crossbeam 2, and a guide rail plate 6.

[0028] The slide assembly includes a slide 1, a first pressure plate 3, a second pressure plate 4, and a hydrostatic system 9. The first pressure plate 3 and the second pressure plate 4 are mounted on the slide 1. There are multiple guide rail plates 6, which are respectively fixed to the first pressure plate 3, the second pressure plate 4, and the slide 1. One side of the crossbeam 2 extends to form a guide rail, which includes a first guide rail 221 and a second guide rail 231. The first guide rail 221 is attached to the first pressure plate 3 and the slide 1 on both sides, and the second guide rail 231 is attached to the second pressure plate 4 and the slide 1 on both sides. The first guide rail 221 and the second guide rail 231 are attached to the guide rail surface of the guide rail plate 6. The guide rail is attached to the guide rail surface of the guide rail plate 6. The guide rail plate 6 is provided with a hydrostatic cavity, which is connected to the hydrostatic system 9 and is used to form a hydrostatic oil film between the guide rail and the guide rail plate 6.

[0029] The static pressure system 9 includes a motor 91; an oil suction filter 92; a gear pump 93; a filter 94; a capillary damping tube 95; an overflow valve 96; a pressure buffer 97; and a pressure gauge 98.

[0030] like Figure 6As shown, motor 91 is electrically connected to gear pump 93. Suction filter 92, gear pump 93, and filter 94 are sequentially arranged on the main oil circuit. Gear pump 93 draws static pressure oil from the oil tank, which passes through suction filter 92 and filter 94 and enters the capillary damping tube 95 on the branch oil circuit. There are multiple capillary damping tubes 95, and the static pressure chamber of one guide plate 6 is connected to one capillary damping tube 95. Overflow valve 96 is connected in parallel on the main oil circuit. Pressure buffer 97 and pressure gauge 98 are connected in series and in parallel with the main oil circuit to display the pressure of the main oil circuit. Each capillary damping tube 95 is connected in series with a pressure gauge 98 to detect the pressure of the branch circuit where the capillary damping tube 95 is located.

[0031] A beam guide rail structure includes the hydrostatic guide rail structure described above, and also includes a strip assembly 5.

[0032] The slide 1 has a protrusion on one side to form a first part 11, a second part 12 and a third part 13. The first part 11, the second part 12 and the third part 13 are arranged in order from top to bottom, and the extension directions of the first part 11, the second part 12 and the third part 13 are parallel to each other.

[0033] The crossbeam 2 includes a main body 21, with a first connecting part 22 and a second connecting part 23 extending from one end of the main body 21. A first guide rail 221 extends from the end of the first connecting part 22, and a second guide rail 231 extends from the end of the second connecting part 23. The first guide rail 221 and the second guide rail 231 are arranged vertically.

[0034] One edge of the first pressure plate 3 protrudes to form a pressing part 31, and the cross-section of the first pressure plate 3 is L-shaped.

[0035] A protrusion on one side of the second pressure plate 4 forms a mounting key 41, which is used to mount the second pressure plate 4.

[0036] The strip assembly 5 includes a first strip 51, a second strip 52, and a strip cover 53. There are multiple strip covers 53, which are used to install the first strip 51 and the second strip 52.

[0037] An installation relationship for a beam-slide structure:

[0038] The first pressure plate 3 is installed on the end face of the first split body 11. The first screw 7 horizontally fixes the first pressure plate 3 to the first split body 11. The pressing part 31 of the first pressure plate 3 presses against the first split body 11 from top to bottom. The second pressure plate 4 is installed on the side of the third split body 13. The third split body 13 is provided with a mounting groove that matches the mounting key 41 of the second pressure plate 4. The mounting key 41 is installed in the mounting groove. The second screw 8 fixes the second pressure plate 4 to the third split body 13 from bottom to top.

[0039] The first guide rail 221 of the crossbeam 2 is attached to the first pressure plate 3 and the slide 1 on both sides. The second guide rail 231 is attached to the second pressure plate 4 and the third split 13. The second connecting part 23 is attached to the second split 12 and the slide 1. Specifically, the upper surface of the second connecting part 23 is attached to the lower surface of the second split 12, and the side of the second connecting part 23 is attached to the side of the slide 1, so that the slide 1 hugs the second guide rail 231.

[0040] The guide plate 6 includes a first guide plate 61, a second guide plate 62, a third guide plate 63, a fourth guide plate 64, a fifth guide plate 65, and a sixth guide plate 66. The first guide plate 61 is disposed on the contact surface between the first pressure plate 3 and the first guide rail 221. The second guide plate 62 is disposed on the contact surface between the slide 1 and the first guide rail 221. The third guide plate 63 is disposed on the contact surface between the second split 12 and the second connecting part 23. The fourth guide plate 64 is disposed on the contact surface between the slide 1 and the second connecting part 23. The fifth guide plate 65 is disposed on the contact surface between the third split 13 and the second guide rail 231. The sixth guide plate 66 is disposed on the base surface between the second pressure plate 4 and the second guide rail 231.

[0041] One insert cover 53 of the insert assembly 5 fixes the first insert 51 to the second pressure plate 4, and the first insert 51 is attached to the sixth guide rail plate 66. The other insert cover 53 installs the second insert 52 on the third split 13, and the second insert 52 is attached to the fifth guide rail plate 65. The installation position of the insert is adjusted by adjusting the insert cover 53, thereby adjusting the gap between the guide rail plate and the guide rail, and thus adjusting the gap between the pressure plate and the guide rail.

[0042] Working principle of a beam sliding block structure:

[0043] Motor 91 drives gear pump 93, causing oil to enter the oil circuit from oil suction filter 92, and then enter the static pressure chamber of guide rail plate 6 through capillary damping tube 95, thereby forming a static pressure oil film in the gap between guide rail and slide assembly of crossbeam 2; the pressing part 31 of first pressure plate 3 presses against slide 1 from top to bottom. When the first pressure plate 3 and slide 1 are subjected to static pressure, the pressing part 31 is supported by slide 1, thereby reducing the force on the first screw 7 that fixes the first pressure plate 3, reducing the deformation of the first pressure plate 3, and maintaining the stability of the static pressure oil film; the mounting key 41 of second pressure plate 4 is embedded in slide 1 and locked from bottom to top by second screw 8, thereby the second The keyway surfaces of the pressure plate 4 and the slide 1 are subjected to force to prevent the gap between the second pressure plate 4 and the crossbeam 2 from increasing and to maintain the stability of the static pressure oil film. The crossbeam 2 and the slide 1 adopt a lower guide structure. The second guide rail 231 of the crossbeam 2 is held tightly by the second part 12 and the third part 13 of the slide 1, so that the second guide rail 231 is constrained by the slide 1, thereby ensuring the parallelism of the upper and lower guide rails when the crossbeam 2 is installed. The contact surfaces of the second guide rail 231, the slide 1, and the second pressure plate 4 are provided with a strip assembly 5. The installation position of the strip is adjusted by adjusting the installation position of the strip by adjusting the strip cover 53, thereby adjusting the gap between the pressure plate and the guide rail, and thus adjusting the static pressure oil film, avoiding repeated disassembly of the pressure plate.

[0044] The advantages of this utility model are:

[0045] A static pressure oil film is formed between the slide assembly and the guide rail of the crossbeam 2. Through the structural design of the first pressure plate 3 and the second pressure plate 4, the first pressure plate 3 and the second pressure plate 4 are prevented from deforming due to the static pressure of the static pressure oil film, thus maintaining the machine tool accuracy.

[0046] The above embodiments only illustrate one implementation of the present utility model, and should not be construed as limiting the scope of the utility model patent. It should be noted that, for those skilled in the art, several modifications and improvements can be made without departing from the concept of the present utility model. These are all equivalent modifications and improvements made to the above embodiments based on the essential technology of the present utility model, and all of these fall within the protection scope of the present utility model.

Claims

1. A hydrostatic guide rail structure, comprising a fixed part and a sliding part, characterized in that: The fixing part includes a fixing component, a guide rail plate, and a hydrostatic system. One side of the sliding part extends to form a guide rail. The guide rail plate is fixed to the fixing component. The guide rail is in contact with the guide rail surface of the guide rail plate. The guide rail plate is provided with a hydrostatic cavity, which is connected to the hydrostatic system, so that a hydrostatic oil film is formed between the guide rail and the guide rail plate. The fixing component includes a fixing member, a first pressure plate, and a second pressure plate. The guide rail includes a first guide rail and a second guide rail. The first pressure plate and the second pressure plate are fixed to the fixing member. The two sides of the first guide rail are in contact with the first pressure plate and the fixing member. The two sides of the second guide rail are in contact with the second pressure plate and the fixing member. The first pressure plate presses against the fixing member from top to bottom. The second pressure plate cooperates with the keyway of the fixing member. The second pressure plate is vertically embedded in the fixing member.

2. The hydrostatic guide rail structure according to claim 1, characterized in that: The hydrostatic system includes a motor, an oil suction filter, a gear pump, a filter, and a capillary damping tube. The motor is electrically connected to the gear pump. The oil suction filter, the gear pump, and the filter are sequentially arranged on the main oil line. The hydrostatic oil enters the capillary damping tube through the filter. There are multiple capillary damping tubes, and each capillary damping tube is connected to one of the hydrostatic chambers.

3. A beam slide structure, comprising the hydrostatic guide rail structure as described in any one of claims 1-2, characterized in that: The fixing component is a slide block, the sliding part is a crossbeam, and the slide block includes a first part, a second part, and a third part. The first part, the second part, and the third part are parallel to each other and are arranged sequentially from top to bottom. The first pressure plate is fixed to the end face of the first part, and the second pressure plate is fixed to the side of the third part.

4. The beam slide structure according to claim 3, characterized in that: The crossbeam slide structure also includes a first screw, the edge of the first pressure plate forms a pressing part, the first screw horizontally fixes the first pressure plate and the first split body, and the pressing part presses against the first split body from top to bottom.

5. The beam slide structure according to claim 3, characterized in that: The crossbeam slide structure also includes a second screw, and the bottom protrusion of the second pressure plate forms a mounting key. The mounting key is embedded in the third part, and the second screw fixes the second pressure plate and the third part from bottom to top.

6. The beam slide structure according to claim 3, characterized in that: The crossbeam also includes a main body and a connecting part. The main body extends a first connecting part and a second connecting part to one side of the guide rail. The first guide rail is located at the end of the first connecting part, and the second guide rail is located at the end of the second connecting part.

7. The beam slide structure according to claim 6, characterized in that: The second guide rail is attached to the side of the second pressure plate, the upper surface of the third split, and the side of the slide, and the upper surface of the second connecting part is attached to the lower surface of the second split.

8. The beam slide structure according to claim 6, characterized in that: The first guide rail and the second guide rail are arranged vertically. There are multiple guide rail plates, including a first guide rail plate, a second guide rail plate, a third guide rail plate, a fourth guide rail plate, a fifth guide rail plate, and a sixth guide rail plate. The first guide rail plate is located at the contact surface between the first pressure plate and the first guide rail. The second guide rail plate is located at the contact surface between the slide and the first guide rail. The third guide rail plate is located at the contact surface between the second split body and the second connecting part. The fourth guide rail plate is located at the contact surface between the slide and the second guide rail. The fifth guide rail plate is located at the contact surface between the third split body and the second guide rail. The sixth guide rail plate is located at the contact surface between the second pressure plate and the second guide rail.

9. The beam slide structure according to claim 8, characterized in that: The crossbeam slide structure also includes a strip assembly, which includes a first strip and a second strip. The first strip is disposed on the contact surface between the second guide rail and the second pressure plate, and the second strip is disposed on the contact surface between the second guide rail and the second pressure plate. The first strip abuts against the sixth guide rail plate, and the second strip abuts against the fifth guide rail plate.

10. The beam slide structure according to claim 9, characterized in that: The insert assembly further includes multiple insert covers, one of which fixes the first insert to the second pressure plate, and another insert cover fixes the second insert to the contact surface of the third component.

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