Static pressure sliding block and machine tool

Abstract

The invention discloses a static pressure sliding block and a machine tool. The static pressure sliding block comprises a sliding block body. An oil inlet channel, an oil outlet channel and a static pressure cavity are formed in the sliding block body, the static pressure cavity comprises a first plane arranged outside the sliding block body, a first cavity and a second cavity surrounding the periphery of the first cavity, the oil inlet channel is communicated with the second cavity, the oil outlet channel is communicated with the first cavity, and the first plane is communicated with the first cavity. A first supporting part flush with the first plane is arranged between the first cavity and the second cavity. The static pressure sliding block at least can solve the problems that the static pressure sliding block is poor in heat dissipation performance and low in bearing capacity.

Description

Technical Field

[0001] The present invention relates to the technical field of guide rails, and in particular to a static pressure slide block and a machine tool. Background Art

[0002] The hydrostatic slider is a slider device that uses the principle of liquid hydrostatic pressure to form an oil film between the working surface of the hydrostatic slider and the relatively moving parts. The oil film has a certain pressure, which allows the moving parts to suspend on the oil film for relative movement. With many advantages such as strong load-bearing capacity, high power transmission efficiency, long service life and low structural accuracy requirements, the hydrostatic slider occupies a pivotal position in the field of precision machine tools.

[0003] The heat dissipation capacity of an ordinary hydrostatic slider is limited by its structure. When the hydrostatic slider moves, heat will be generated inside the oil chamber of the hydrostatic slider due to friction and other reasons. The oil return method of the oil chamber of an ordinary hydrostatic slider is single, and the oil return is only through the oil sealing edge of the outer ring of the oil chamber. This single oil return method often causes the heat to fail to be dissipated in time after the heat is generated inside the oil chamber, which leads to a gradual increase in the oil temperature inside the oil chamber. The increase in oil temperature will bring a series of adverse consequences. For example, due to the temperature difference between different parts of the hydrostatic slider, thermal stress will be generated inside the hydrostatic slider. The generation of thermal stress may cause the hydrostatic slider to bend or twist, thereby reducing the movement accuracy and movement smoothness of the hydrostatic slider, and thus affecting the stability of the entire mechanical system.

[0004] In addition, the static load-bearing capacity of ordinary hydrostatic sliders is limited by their structure and material strength. When the hydrostatic slider is not oiled, when the hydrostatic slider is stationary on the base of the machine tool and bears a large load, the contact area between the hydrostatic slider and the base is relatively small, so the pressure per unit area on the hydrostatic slider is large. Once the pressure per unit area of ​​the hydrostatic slider exceeds the allowable pressure of the hydrostatic slider, a depression will appear on the surface of the hydrostatic slider. Once this depression is formed, it will change the geometric shape of the hydrostatic slider, which will not only reduce the motion accuracy of the hydrostatic slider, but also reduce the load-bearing performance and service life of the hydrostatic slider. Summary of the invention

[0005] The main purpose of the present invention is to provide a hydrostatic slider and a machine tool, which at least solve the problems of poor heat dissipation performance and low load-bearing capacity of the hydrostatic slider.

[0006] According to one aspect of the present invention, there is provided a static pressure slider, comprising:

[0007] A slider body, wherein an oil inlet channel, an oil outlet channel and a static pressure chamber are provided on the slider body, wherein the static pressure chamber comprises a first plane provided outside the slider body, a first chamber and a second chamber surrounding the outer periphery of the first chamber, wherein the oil inlet channel is communicated with the second chamber, the oil outlet channel is communicated with the first chamber, and a first support portion flush with the first plane is provided between the first chamber and the second chamber.

[0008] Further, the oil outlet channel includes a first oil outlet, a second oil outlet, a first channel section and a second channel section;

[0009] Wherein, the first channel section and the second channel section are connected and the axis of the first channel section is perpendicular to the axis of the second channel section, the first oil outlet is arranged at an end of the first channel section away from the second channel section and the first oil outlet is located in the first chamber, and the second oil outlet is arranged at an end of the second channel section away from the first channel section and the second oil outlet is located outside the static pressure chamber.

[0010] Furthermore, in the projection along the first direction of the slider body, the static pressure chamber and the first chamber are both arranged in a rectangular shape, and along the length direction of the rectangle, first midlines of the static pressure chamber and the first chamber are collinear.

[0011] Furthermore, along the length direction of the rectangle, a plurality of avoidance holes arranged at intervals are arranged in the second chamber, and along the width direction of the rectangle, the distance between the second midline of the static pressure chamber and the third midline of the first chamber is not greater than 1 / 3 of the width of the static pressure chamber.

[0012] Further, the static pressure chamber includes a plurality of chambers, and the slider body includes a plurality of working planes;

[0013] Wherein, each of the static pressure chambers is respectively arranged on each of the working planes.

[0014] Further, the static pressure chamber includes a first static pressure chamber, a second static pressure chamber and a third static pressure chamber, and the working plane includes the first plane, the second plane and the third plane;

[0015] The first static pressure chamber is arranged on the first plane, the second static pressure chamber is arranged on the second plane opposite to the first plane, the third static pressure chamber is arranged on the third plane and the third plane is adjacent to the first plane and the second plane.

[0016] Furthermore, the static pressure slider further comprises a throttling device, and the oil inlet passage comprises a first oil inlet and a second oil inlet;

[0017] Wherein, the throttling device is arranged between the first oil inlet and the second oil inlet and connected to the oil inlet channel to control the amount of oil flowing from the oil inlet channel into the static pressure chamber.

[0018] Further, the throttling device includes a first throttle and a second throttle, one of the first throttle and the second throttle controls the amount of oil flowing from the oil inlet passage into the first static pressure chamber and the third static pressure chamber, and the other of the first throttle and the second throttle controls the amount of oil flowing from the oil inlet passage into the second static pressure chamber; or,

[0019] One of the first throttle and the second throttle controls the flow rate of the oil inlet passage flowing into the second static pressure chamber and the third static pressure chamber, and the other of the first throttle and the second throttle controls the amount of oil flowing into the first static pressure chamber from the oil inlet passage.

[0020] Further, the static pressure slider further includes a first detection device and a second detection device, both of which are arranged on the slider body, and the first detection device is at least used to detect the hydraulic oil pressure of the first static pressure chamber or the second static pressure chamber, and the second detection device is at least used to detect the hydraulic oil pressure of the third static pressure chamber; or,

[0021] The first detection device is at least used to detect the hydraulic oil pressure of the third static pressure chamber, and the second detection device is at least used to detect the hydraulic oil pressure of the first static pressure chamber or the second static pressure chamber.

[0022] On the other hand, the present application also mentions a machine tool, which includes the above-mentioned static pressure slide.

[0023] In the present invention, a first chamber and an oil outlet channel connected to the first chamber are provided on the slider body, and a first support portion flush with the first plane is provided around the first chamber, so that the hydrostatic slider of the present application can solve the problems of poor heat dissipation performance and low load-bearing capacity of the hydrostatic slider. In actual operation, hydraulic oil with a certain pressure enters the second chamber of the hydrostatic chamber through the oil inlet channel. Among them, a part of the hydraulic oil flows out from the outer edge around the second chamber to the outside of the hydrostatic chamber, and another part of the hydraulic oil enters the first chamber of the hydrostatic chamber through the surface of the first support portion, and finally flows out to the outside of the hydrostatic chamber through the oil outlet channel. During this period, since the hydraulic oil has a certain pressure, and the hydraulic oil can form an oil film with a certain thickness on the first plane of the hydrostatic slider, thereby separating the hydrostatic slider from the predetermined component (the predetermined component can be a guide rail, a machine tool base, a machine tool workbench, etc.), wear between the hydrostatic slider and the predetermined component can be avoided when performing relative movement. When the hydrostatic slider is not working, the hydrostatic slider is in a stationary state. At this time, no hydraulic oil is provided to the hydrostatic slider, and the hydrostatic slider is in direct contact with the predetermined component. Since the present application provides a first support portion flush with the first plane between the first chamber and the second chamber, the force-bearing area of ​​the hydrostatic slider can be increased, thereby improving the load-bearing capacity of the hydrostatic slider and avoiding the formation of depressions on the slider body.

[0024] That is to say, compared with the existing hydrostatic slider, the hydrostatic slider of the present application can not only avoid the formation of depressions on the slider body, but also increase the oil return path of the hydrostatic slider by setting an oil outlet channel in the present application, which can improve the heat dissipation performance of the hydrostatic slider to a certain extent, thereby avoiding the deformation and failure of the hydrostatic slider caused by the gradual increase in oil temperature inside the hydrostatic chamber. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] The drawings described herein are used to provide a further understanding of the present invention and constitute a part of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention. In the drawings:

[0026] Figure 1 It is a structural diagram of the machine tool disclosed in the embodiment of the present invention when it is in a first viewing angle;

[0027] Figure 2 An exploded view of the machine tool disclosed in the embodiment of the present invention when it is in a second viewing angle;

[0028] Figure 3 It is a structural diagram of the static pressure slider disclosed in an embodiment of the present invention when it is at a third viewing angle;

[0029] Figure 4 It is a structural diagram of the oil outlet channel disclosed in an embodiment of the present invention;

[0030] Figure 5 It is a structural diagram of the static pressure chamber disclosed in an embodiment of the present invention when it is at a fourth viewing angle;

[0031] Figure 6 It is a structural diagram of the static pressure slider disclosed in an embodiment of the present invention when it is at a fifth viewing angle;

[0032] Figure 7 This is a structural diagram of the static pressure slider disclosed in an embodiment of the present invention when it is at a fourth viewing angle.

[0033] The above drawings include the following reference numerals:

[0034] 10. Slider body; 11. Working plane; 111. First plane; 112. Second plane; 113. Third plane; 20. Oil inlet channel; 21. First oil inlet; 22. Second oil inlet; 30. Oil outlet channel; 31. First oil outlet; 32. Second oil outlet; 33. First channel section; 34. Second channel section; 40. Static pressure chamber; 41. First static pressure chamber; 411. First chamber; a. First center line; 412. First Two chambers; b, second center dividing line; c, third center dividing line; d, spacing; w, width; 413, first supporting part; z, first direction; y, length direction; x, width direction; 42, second static pressure chamber; 43, third static pressure chamber; 50, avoidance hole; 60, throttling device; 61, first throttle; 62, second throttle; 70, first detection device; 80, second detection device; 90, base; 91, pressure plate; 100, processing table. DETAILED DESCRIPTION

[0035] It should be noted that, in the absence of conflict, the embodiments of the present invention and the features in the embodiments can be combined with each other. The present invention will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0036] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit exemplary embodiments according to the present invention. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprising" and / or "including" are used in this specification, it indicates the presence of features, steps, operations, devices, components and / or combinations thereof.

[0037] Unless otherwise specifically stated, the relative arrangement of the parts and steps described in these embodiments, numerical expressions and numerical values ​​do not limit the scope of the present invention. At the same time, it should be understood that, for ease of description, the sizes of the various parts shown in the accompanying drawings are not drawn according to the actual proportional relationship. The technology, methods and equipment known to ordinary technicians in the relevant field may not be discussed in detail, but in appropriate cases, the technology, methods and equipment should be regarded as a part of the authorization specification. In all examples shown and discussed here, any specific value should be interpreted as being merely exemplary, rather than as a limitation. Therefore, other examples of exemplary embodiments may have different values. It should be noted that similar reference numerals and letters represent similar items in the following drawings, so once a certain item is defined in an accompanying drawing, it does not need to be further discussed in subsequent drawings.

[0038] In order to solve the problems of poor heat dissipation performance and low load-bearing capacity of the hydrostatic slider, a hydrostatic slider is provided according to an embodiment of the present application. The hydrostatic slider of the present application will be described in detail below in conjunction with the accompanying drawings.

[0039] See also Figures 1 to 7 As shown, according to an embodiment of the present application, a hydrostatic slider is provided, which includes a slider body 10 .

[0040] Among them, the slider body 10 is provided with an oil inlet channel 20, an oil outlet channel 30 and a static pressure chamber 40, the static pressure chamber 40 includes a first plane 111 arranged outside the slider body 10, a first chamber 411 and a second chamber 412 surrounding the outer periphery of the first chamber 411, the oil inlet channel 20 is connected with the second chamber 412, the oil outlet channel 30 is connected with the first chamber 411, and a first support portion 413 flush with the first plane 111 is arranged between the first chamber 411 and the second chamber 412.

[0041] In the present application, a first chamber 411 and an oil outlet channel 30 connected to the first chamber 411 are provided on the slider body 10, and a first support portion 413 flush with the first plane 111 is provided around the first chamber 411, so that the hydrostatic slider of the present application can solve the problems of poor heat dissipation performance and low load-bearing capacity of the hydrostatic slider. During actual operation, hydraulic oil with a certain pressure enters the second chamber 412 of the hydrostatic chamber 40 through the oil inlet channel 20. Among them, a part of the hydraulic oil flows out from the outer edge around the second chamber 412 to the outside of the hydrostatic chamber 40, and another part of the hydraulic oil enters the first chamber 411 of the hydrostatic chamber 40 through the surface of the first support portion 413, and finally flows out to the outside of the hydrostatic chamber 40 through the oil outlet channel 30. During this period, since the hydraulic oil has a certain pressure and the hydraulic oil can form an oil film with a certain thickness on the first plane 111 of the hydrostatic slider, the hydrostatic slider is separated from the predetermined component (the predetermined component can be a guide rail, a machine tool base, a machine tool worktable, etc.), which can avoid the wear between the hydrostatic slider and the predetermined component during relative movement. When the hydrostatic slider is not working, the hydrostatic slider is in a stationary state. At this time, no hydraulic oil is provided to the hydrostatic slider, and the hydrostatic slider is in direct contact with the predetermined component. Since the first support portion 413 flush with the first plane 111 is provided between the first chamber 411 and the second chamber 412, the force-bearing area of ​​the hydrostatic slider can be increased, thereby improving the load-bearing capacity of the hydrostatic slider, and avoiding the generation of depressions on the slider body 10.

[0042] That is to say, compared with the existing hydrostatic slider, the hydrostatic slider of the present application can not only avoid the formation of depressions on the slider body 10, but also increase the oil return path of the hydrostatic slider by setting the oil outlet channel 30 in the present application, which can improve the heat dissipation performance of the hydrostatic slider to a certain extent, thereby avoiding the deformation and failure of the hydrostatic slider caused by the gradual increase in oil temperature inside the hydrostatic chamber 40.

[0043] For example, see Figure 5 and Figure 7As shown, under the same hydraulic oil model (VG46), the same movement speed (v=60m / min), the same load (F=10000N), and the same throttle (i.e., the first throttle 61 and the second throttle 62 mentioned below) parameters (Ps=3.2MPa, Q0=30ml / min, Kr=2.185), when the existing hydrostatic slider of the same size without the oil outlet channel 30, the first chamber 411, and the first support portion 413 is compared with the hydrostatic slider of the present application, the hydrostatic slider of the present application can improve the static bearing capacity of the hydrostatic chamber of the hydrostatic slider of the present application by 46.5%, improve the oil film stiffness by 44.7%, and reduce the oil temperature rise by 14% by reasonably setting the dimensions of the oil outlet channel 30, the first chamber 411, and the first support portion 413. The improvement of this series of parameters can fully demonstrate that the hydrostatic slider of the present application has obvious advantages in the above-mentioned performance compared with the existing hydrostatic slider, thereby solving the problems of poor heat dissipation performance and low load-bearing capacity of the hydrostatic slider.

[0044] Further, see Figure 3 and Figure 4 As shown, the oil outlet channel 30 includes a first oil outlet 31, a second oil outlet 32, a first channel section 33 and a second channel section 34. The first channel section 33 and the second channel section 34 are connected and the axis of the first channel section 33 and the axis of the second channel section 34 are perpendicular to each other. The first oil outlet 31 is arranged at one end of the first channel section 33 away from the second channel section 34 and the first oil outlet 31 is located in the first chamber 411. The second oil outlet 32 ​​is arranged at one end of the second channel section 34 away from the first channel section 33 and the second oil outlet 32 ​​is located outside the static pressure chamber 40.

[0045] Specifically, the present application adopts the setting mode that the first channel section 33 and the second channel section 34 are connected and the axis of the first channel section 33 and the axis of the second channel section 34 are perpendicular to each other because such setting mode has two significant advantages. First, since the drilling method is required when processing the oil outlet channel 30 on the slider body 10, the setting mode that the axes of the first channel section 33 and the second channel section 34 are perpendicular to each other can make the processing technology simpler, thereby making it easier to process, so such setting mode can reduce the production cost to a certain extent. Second, since the hydraulic oil has a certain viscosity, the static pressure slider of the present application adopts the setting mode that the axes of the first channel section 33 and the second channel section 34 are perpendicular to each other, which can change the flow direction of the hydraulic oil flowing in the oil outlet channel 30, and can better limit the outflow speed of the hydraulic oil, so that the outflow speed of the hydraulic oil is kept within a reasonable range, thereby avoiding the insufficient oil film thickness between the static pressure slider and the predetermined component caused by the excessive outflow speed of the hydraulic oil, and thus avoiding the load-bearing capacity of the static pressure slider during operation being affected.

[0046] In addition, the present application adopts the setting mode that the oil inlet channel 20 is connected with the second chamber 412 and the oil outlet channel 30 is connected with the first chamber 411, rather than the setting mode that the oil inlet channel 20 is connected with the first chamber 411 and the oil outlet channel 30 is connected with the second chamber 412, or the setting mode that both the oil inlet channel 20 and the oil outlet channel 30 are connected with the first chamber 411 or the second chamber 412. This is because if the setting mode that the oil inlet channel 20 is connected with the first chamber 411 and the oil outlet channel 30 is connected with the second chamber 412 is adopted, the oil volume in the second chamber 412 will drop suddenly (because the hydraulic oil in the second chamber 412 can originally flow out from the outer edge of the second chamber 412 to the outside of the static pressure chamber 40), thereby resulting in insufficient load-bearing capacity of the static pressure slider when working. If the oil inlet channel 20 and the oil outlet channel 30 are both connected to the first chamber 411, the hydraulic oil may flow out directly from the oil outlet channel 30 instead of flowing into the second chamber 412 from the surface of the first support portion 413, which may seriously affect the load-bearing capacity of the hydrostatic slider during operation. If the oil inlet channel 20 and the oil outlet channel 30 are both connected to the second chamber 412, the oil volume in the second chamber 412 may drop suddenly, which may seriously affect the load-bearing capacity of the hydrostatic slider during operation. Moreover, such a setting may also make it impossible for the hydraulic oil in the first chamber 411 to be discharged.

[0047] Further, see Figure 3 , Figure 5 as well as Figure 7 As shown, in the projection along the first direction of the slider body 10, the static pressure chamber 40 and the first chamber 411 are both arranged in a rectangular shape, and along the length direction of the rectangle, the first midline a of the static pressure chamber 40 and the first chamber 411 are collinear.

[0048] Specifically, the first direction is Figure 3 The direction indicated by z in the figure. In the present embodiment, the static pressure chamber 40 and the first chamber 411 are both arranged in a rectangular shape. In other embodiments of the present application, the static pressure chamber 40 and the first chamber 411 may also be in a square, circular, elliptical or other shapes. That is to say, the shapes of the static pressure chamber 40 and the first chamber 411 may be reasonably adjusted according to the approximate shape of the static pressure slider and actual needs. In the present embodiment, since the shape of the static pressure slider shown in the present embodiment is roughly a rectangular parallelepiped, in order to ensure the stability of the static pressure slider during operation and the uniform distribution of the oil film on the surface of the static pressure slider, the static pressure chamber 40 and the first chamber 411 are specially arranged in the present embodiment according to the rectangular parallelepiped shape of the static pressure slider and actual needs. The length direction of the rectangle is Figure 5 and Figure 7In the direction indicated by y, along the length direction of the rectangle, the present application adopts a colinear design for the first centerline a of the static pressure chamber 40 and the first chamber 411, that is, the static pressure chamber 40 and the first chamber 411 are symmetrical about the first centerline a, so that the first chamber 411 and the first support portion 413 can be located in the middle of the rectangle in the length direction of the rectangle. In addition, such a setting can also ensure that after the hydraulic oil is provided to the static pressure slider, the oil film area and oil film thickness on the two sides separated by the first centerline a are consistent, so that the static pressure slider can avoid the situation where the forces on the two sides separated by the first centerline a are different during operation.

[0049] Further, see Figure 3 , Figure 5 as well as Figure 7 As shown, along the length direction of the rectangle, a plurality of avoidance holes 50 are arranged at intervals in the second chamber 412, and along the width direction of the rectangle, the distance D between the second midline b of the static pressure chamber 40 and the third midline c of the first chamber 411 is not greater than 1 / 3 of the width W of the static pressure chamber 40.

[0050] Specifically, the width direction of the rectangle is Figure 4 as well as Figure 7 The avoidance hole 50 is mainly used to fix the static pressure slider on other structures (such as machine tool base and workbench). Figure 7 In the figure, the number of avoidance holes 50 on both sides of the first midline a is equal, that is, the avoidance holes 50 on both sides of the first midline a are symmetrically arranged about the first midline a. Such an arrangement is mainly to ensure that after the static pressure slider is fixed on a structure such as a machine tool base or a workbench, the static pressure slider is subjected to uniform force along the length direction of the rectangle and does not tilt. In particular, when the static pressure slider is used on a high-precision machine tool, higher requirements are placed on the design and processing of the static pressure slider. In addition, in order to ensure that after the static pressure slider is installed through a fixing member (not shown in the figure), the end of the fixing member in the avoidance hole 50 close to the second chamber 412 does not protrude from the first plane 111, the avoidance hole 50 generally adopts a countersunk hole arrangement. Moreover, the reason why the present application adopts the setting mode that the distance D between the second bisecting line b of the static pressure chamber 40 and the third bisecting line c of the first chamber 411 is not greater than 1 / 3 of the width W of the static pressure chamber 40 is to avoid the first chamber 411 in the width direction of the rectangle (i.e. Figure 7If the spacing D is greater than 1 / 3 of the width W of the static pressure chamber 40, the first chamber 411 is too close to the edge of the static pressure slider, which may cause uneven oil film thickness on both sides of the second midline b of the static pressure chamber 40, and further cause inconsistent forces on both sides of the second midline b of the static pressure chamber 40, causing the static pressure slider to tilt during operation, affecting the normal operation of the static pressure slider, and in severe cases, causing damage to the static pressure slider.

[0051] Further, see Figure 3 , Figure 6 as well as Figure 7 As shown, the static pressure chamber 40 includes a plurality of static pressure chambers, and the slider body 10 includes a plurality of working planes 11. Each static pressure chamber 40 is disposed on each working plane 11, respectively.

[0052] For example, the slider body 10 of the present application may include one, two or more working planes 11, and accordingly, the hydrostatic slider may also include one, two or more hydrostatic chambers 40, and the hydrostatic chambers 40 correspond to the working planes 11. This embodiment shows that the hydrostatic slider has three working planes 11 and three hydrostatic chambers 40. In other embodiments of the present application, the number of working planes 11 and hydrostatic chambers 40 can be reasonably selected according to the appearance of the hydrostatic slider and working needs, and the positions of the working planes 11 and the hydrostatic chambers 40 on the hydrostatic slider can also be reasonably selected according to actual needs.

[0053] Further, see Figure 3 , Figure 5 , Figure 6 as well as Figure 7 As shown, the static pressure chamber 40 includes a first static pressure chamber 41, a second static pressure chamber 42 and a third static pressure chamber 43, and the working plane 11 includes a first plane 111, a second plane 112 and a third plane 113. The first static pressure chamber 41 is arranged on the first plane 111, the second static pressure chamber 42 is arranged on the second plane 112 opposite to the first plane 111, and the third static pressure chamber 43 is arranged on the third plane 113 and the third plane 113 is adjacent to the first plane 111 and the second plane 112.

[0054] Specifically, the first static pressure chamber 41, the second static pressure chamber 42 and the third static pressure chamber 43 of the present application may include an oil outlet channel 30, a first chamber 411 and a first support portion 413. This embodiment shows that the first static pressure chamber 41 is independently provided with an oil outlet channel 30, a first chamber 411 and a first support portion 413, while the second static pressure chamber 42 and the third static pressure chamber 43 are not provided with an oil outlet channel 30, a first chamber 411 and a first support portion 413. The first static pressure chamber 41 and the second static pressure chamber 42 may be filled with hydraulic oil having a certain pressure, so that in the first direction (i.e. Figure 3 In the direction indicated by z in the figure, the hydrostatic slider is separated from the matching structures such as the machine tool base and the guide rail, that is, an oil film is formed on the first plane 111 and the second plane 112, so that the machine tool base and the guide rail do not directly contact the hydrostatic slider, thereby avoiding damage to the hydrostatic slider during operation. In addition, in order to ensure that the workbench and other structures connected to the hydrostatic slider do not move in the width direction (i.e., the width direction) of the hydrostatic slider when moving on the machine tool base or the guide rail, Figure 4 as well as Figure 7 The present application sets a third static pressure chamber 43 on the third plane 113 of the static pressure slider, so that an oil film can be formed between the third static pressure chamber 43 and the working surface of the machine tool base or guide rail opposite to the third static pressure chamber 43. Under the joint action of the first static pressure chamber 41, the second static pressure chamber 42 and the third static pressure chamber 43, the workbench and other structures connected to the static pressure slider can be suspended on the machine tool base or guide rail and other structures, which is more conducive to the movement of the workbench and other structures on the machine tool base or guide rail and other structures.

[0055] Further, see Figure 3 , Figure 6 as well as Figure 7 As shown, the static pressure slider further includes a throttling device 60, and the oil inlet channel 20 includes a first oil inlet port 21 and a second oil inlet port 22. The throttling device 60 is disposed between the first oil inlet port 21 and the second oil inlet port 22 and connected to the oil inlet channel 20 to control the amount of oil flowing from the oil inlet channel 20 into the static pressure chamber 40.

[0056] Specifically, the throttling device 60 has the function of controlling the moving speed of the hydrostatic slider, and at the same time, can buffer the hydrostatic slider by slowing down its speed when it approaches the end of the stroke, and can keep the hydrostatic slider working at the set pressure during the operation of the hydrostatic slider, etc. In actual operation, the hydraulic oil enters the oil inlet channel 20 through the first oil inlet 21, and then enters the throttling device 60 through the oil inlet channel 20, and then the hydraulic oil is adjusted by the throttling device 60, and finally enters each hydrostatic chamber 40 of the hydrostatic slider through the second oil inlet 22. In this embodiment, after the hydraulic oil enters the first static pressure chamber 41 through the second oil inlet 22, it first enters the second chamber 412 of the first static pressure chamber 41, a portion of the hydraulic oil in the first static pressure chamber 41 flows out of the first static pressure chamber 41 through the outer edge of the second chamber 412 (that is, the first plane 111), and another portion of the hydraulic oil in the first static pressure chamber 41 flows into the second chamber 412 through the upper surface of the first support portion 413 flush with the first plane 111, and finally flows out to the outside of the first static pressure chamber 41 through the oil outlet channel 30. After the hydraulic oil enters the second static pressure chamber 42 and the third static pressure chamber 43 through the second oil inlet 22 of the second static pressure chamber 42 and the third static pressure chamber 43 respectively, it finally flows out to the outside of the second static pressure chamber 42 and the third static pressure chamber 43 from the outer edge of the second static pressure chamber 42 (the outer edge flush with the second plane 112) and the outer edge of the third static pressure chamber 43 (the outer edge flush with the third plane 113).

[0057] Further, see Figure 3 , Figure 6 as well as Figure 7 As shown, the throttling device 60 includes a first throttle 61 and a second throttle 62, one of the first throttle 61 and the second throttle 62 controls the amount of oil flowing from the oil inlet passage 20 into the first static pressure chamber 41 and the third static pressure chamber 43, and the other of the first throttle 61 and the second throttle 62 controls the amount of oil flowing from the oil inlet passage 20 into the second static pressure chamber 42. Alternatively, one of the first throttle 61 and the second throttle 62 controls the flow rate of the oil inlet passage 20 flowing into the second static pressure chamber 42 and the third static pressure chamber 43, and the other of the first throttle 61 and the second throttle 62 controls the amount of oil flowing from the oil inlet passage 20 into the first static pressure chamber 41.

[0058] Exemplarily, this embodiment shows that the first throttle 61 controls the flow rate of the oil inlet channel 20 flowing into the second static pressure chamber 42 and the third static pressure chamber 43, and the second throttle 62 controls the amount of oil flowing into the first static pressure chamber 41 from the oil inlet channel 20. In addition, in this embodiment, the first throttle 61 is a combination structure of a diaphragm feedback throttle and a slit throttle, and the second throttle 62 is a diaphragm feedback throttle. In other embodiments of the present application, the first throttle 61 and the second throttle 62 can also be throttles such as fixed throttles, variable throttles and plunger throttles. Of course, in other embodiments of the present application, the static pressure slider can also adopt a one-to-one corresponding setting mode of the throttle device 60 and the static pressure chamber 40, and the throttle device 60 is respectively installed at different parts of the static pressure slider, or the throttle device 60 is uniformly placed in a fixed position of a structure such as a machine tool base. The reason why the present embodiment adopts the first throttle 61 composed of a diaphragm feedback throttle and a slit throttle to control the flow of the oil inlet channel 20 into the second static pressure chamber 42 and the third static pressure chamber 43 is that such a setting can not only improve stability, enhance response speed and optimize flow distribution, but also has the advantages of simplifying structure and installation, saving space and extending service life.

[0059] Further, see Figure 3 , Figure 6 as well as Figure 7 As shown, the static pressure slider further includes a first detection device 70 and a second detection device 80, both of which are arranged on the slider body 10, and the first detection device 70 is at least used to detect the hydraulic oil pressure of the first static pressure chamber 41 or the second static pressure chamber 42, and the second detection device 80 is at least used to detect the hydraulic oil pressure of the third static pressure chamber 43. Alternatively, the first detection device 70 is at least used to detect the hydraulic oil pressure of the third static pressure chamber 43, and the second detection device 80 is at least used to detect the hydraulic oil pressure of the first static pressure chamber 41 or the second static pressure chamber 42.

[0060] Specifically, in the present application, the hydraulic oil pressures of the first static pressure chamber 41 and the second static pressure chamber 42 do not need to be measured in full, and only the hydraulic oil pressure in one of the first static pressure chamber 41 and the second static pressure chamber 42 needs to be measured. This is because the first static pressure chamber 41 and the second static pressure chamber 42 are in two opposite positions, and the static pressure slider is in the first direction (i.e. Figure 3The first static pressure chamber 41 and the second static pressure chamber 42 are in a state of force balance. Therefore, only by measuring the pressure of the hydraulic oil in one of the first static pressure chamber 41 and the second static pressure chamber 42, the pressure of the hydraulic oil in the other one can be obtained, which can save costs and simplify the structure of the static pressure slider to a certain extent. This embodiment shows a situation where the first detection device 70 is used to detect the hydraulic oil pressure of the first static pressure chamber 41 and the second detection device 80 is used to detect the hydraulic oil pressure of the third static pressure chamber 43. Moreover, in other embodiments of the present application, a one-to-one correspondence arrangement between the static pressure chamber 40 and the detection device (such as the first detection device 70 and the second detection device 80) can also be adopted.

[0061] On the other hand, the present application also mentions a machine tool, which includes the above-mentioned static pressure slide.

[0062] Specifically, the machine tool of the present application can be a CNC milling machine, a precision grinder, a lathe, a special processing machine tool, etc. The reason why the static pressure slider of the present application is applied to the machine tool is that the static pressure slider of the present application not only has the advantages of high precision, low wear, high rigidity and good damping characteristics of the existing static pressure slider, but also has the advantages of strong heat dissipation ability, large static load-bearing capacity, and not easy to damage. In addition, the static pressure slider of the present application can also be applied to some structures other than machine tools, such as transmission devices and other structures.

[0063] Exemplarily, the machine tool of the present embodiment generally includes a base 90, a pressure plate 91 and a processing table 100. When installing the hydrostatic slider on the machine tool, first, a fixing piece is used to penetrate from the avoidance hole 50 of the first plane 111 of each hydrostatic slider to the second plane 112 of each hydrostatic slider to fix the hydrostatic slider on the processing table 100, then two pressure plates 91 are fixed to the base 90 respectively, and finally the processing table 100 equipped with the hydrostatic slider is slid into and installed on the base 90 equipped with the pressure plate 91. The matching structure between the hydrostatic slider and the processing table 100 and the matching structure between the pressure plate 91 and the base 90 can form a mutually engaging structure, so that when the processing table 100 slides on the base 90, due to the action of the hydrostatic slider, the processing table 100 and the base 90 can be separated by a hydraulic oil film, thereby avoiding wear between the processing table 100 and the base 90. Moreover, the two pressing plates 91 on the base 90 can not only prevent the processing table 100 and the static pressure slider from falling off the base 90, but also ensure the stability between the processing table 100 and the base 90. In addition, since the second plane 112 of the static pressure slider is opposite to the pressing plate 91 during actual operation, the second plane 112 and the pressing plate 91 are also separated by an oil film, thereby preventing the machine tool from being damaged.

[0064] From the above statements, it can be known that the present application can solve the problems of poor heat dissipation performance and low load-bearing capacity of the static pressure slider by providing a static pressure slider composed of a slider body 10, an oil inlet channel 20, an oil outlet channel 30, a static pressure chamber 40, an avoidance hole 50, a throttling device 60, a first detection device 70 and a second detection device 80. In actual operation, the hydraulic oil enters the oil inlet channel 20 through the first oil inlet 21, and a part of the hydraulic oil in the oil inlet channel 20 flows into the second static pressure chamber 42 and the third static pressure chamber 43 after being adjusted by the first throttle 61, and then flows out from the outer edge of the second static pressure chamber 42 and the outer edge of the third static pressure chamber 43 to the outside of the second static pressure chamber 42 and the third static pressure chamber 43. Another part of the hydraulic oil in the oil inlet channel 20 flows into the first static pressure chamber 41 after being adjusted by the second throttle 62, and then a part of the hydraulic oil in the first static pressure chamber 41 flows out of the first static pressure chamber 41 through the outer edge of the second chamber 412, and another part of the hydraulic oil in the first static pressure chamber 41 flows into the second chamber 412 through the upper surface of the first support portion 413 flush with the first plane 111, and finally flows out of the first static pressure chamber 41 through the oil outlet channel 30. During this period, due to the action of the hydraulic oil, a layer of oil film can be formed between the first plane 111 and the base 90, between the second plane 112 and the pressure plate 91, and between the third plane 113 and the base 90, thereby avoiding wear between the processing table 100 and the base 90. In addition, after the static pressure slide block of the present application is installed on the machine tool, the load-bearing capacity of the machine tool can be increased and the accuracy of the machine tool can be improved.

[0065] It can be seen that the present application adds a first chamber 411 and an oil outlet channel 30 connected to the first chamber 411 on the basis of the existing hydrostatic chamber 40, and a first support portion 413 flush with the first plane 111 is provided around the first chamber 411. In this way, the structure of the hydrostatic chamber 40 of the existing hydrostatic slider and the oil return method can be changed. On the one hand, the heat dissipation efficiency of the hydrostatic slider is improved by increasing the oil return path, which can solve a series of problems caused by the increase in the temperature of the hydraulic oil. On the other hand, the internal structure of the hydrostatic chamber 40 is optimized by the first support portion 413, and the contact area between the hydrostatic slider and the base 90 and other structures is increased, which can improve the load-bearing capacity of the hydrostatic slider when it is stationary and not supplied with oil, thereby comprehensively improving the performance of the hydrostatic slider and ensuring the efficient and stable operation of equipment such as precision machine tools.

[0066] For ease of description, spatially relative terms such as "above", "above", "on the upper surface of", "above", etc. may be used here to describe the spatial positional relationship between a device or feature and other devices or features as shown in the figure. It should be understood that spatially relative terms are intended to include different orientations of the device in use or operation in addition to the orientation described in the figure. For example, if the device in the accompanying drawings is inverted, the device described as "above other devices or structures" or "above other devices or structures" will be positioned as "below other devices or structures" or "below other devices or structures". Thus, the exemplary term "above" can include both "above" and "below". The device can also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatially relative descriptions used here are interpreted accordingly.

[0067] In addition, it should be noted that the use of terms such as "first" and "second" to limit components is only for the convenience of distinguishing the corresponding components. If not otherwise stated, the above terms have no special meaning and therefore cannot be understood as limiting the scope of protection of the present invention.

[0068] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A static pressure slider, characterized in that: include: A slider body (10), wherein the slider body (10) is provided with an oil inlet channel (20), an oil outlet channel (30) and a static pressure chamber (40), wherein the static pressure chamber (40) comprises a first plane (111) arranged outside the slider body (10), a first chamber (411) and a second chamber (412) surrounding the outer periphery of the first chamber (411), wherein the oil inlet channel (20) is communicated with the second chamber (412), the oil outlet channel (30) is communicated with the first chamber (411), and a first support portion (413) flush with the first plane (111) is provided between the first chamber (411) and the second chamber (412).

2. The hydrostatic slider according to claim 1, characterized in that: The oil outlet channel (30) comprises a first oil outlet (31), a second oil outlet (32), a first channel section (33) and a second channel section (34); The first channel section (33) and the second channel section (34) are connected and the axis of the first channel section (33) is perpendicular to the axis of the second channel section (34). The first oil outlet (31) is arranged at one end of the first channel section (33) away from the second channel section (34) and the first oil outlet (31) is located in the first chamber (411). The second oil outlet (32) is arranged at one end of the second channel section (34) away from the first channel section (33) and the second oil outlet (32) is located outside the static pressure chamber (40).

3. The hydrostatic slider according to claim 1, characterized in that: In the projection along the first direction of the slider body (10), the static pressure chamber (40) and the first chamber (411) are both arranged in a rectangular shape, and along the length direction of the rectangle, the first midline (a) of the static pressure chamber (40) and the first chamber (411) are collinear.

4. The hydrostatic slider according to claim 3, characterized in that: Along the length direction of the rectangle, a plurality of avoidance holes (50) are arranged at intervals in the second chamber (412), and along the width direction of the rectangle, a distance (D) between a second midline (b) of the static pressure chamber (40) and a third midline (c) of the first chamber (411) is no greater than 1 / 3 of a width (W) of the static pressure chamber (40).

5. The hydrostatic slider according to claim 1, characterized in that: The static pressure chamber (40) includes a plurality of them, and the slider body (10) includes a plurality of working planes (11); Wherein, each of the static pressure chambers (40) is respectively arranged on each of the working planes (11).

6. The hydrostatic slider according to claim 5, characterized in that: The static pressure chamber (40) includes a first static pressure chamber (41), a second static pressure chamber (42) and a third static pressure chamber (43); the working plane (11) includes the first plane (111), the second plane (112) and the third plane (113); Wherein, the first static pressure chamber (41) is arranged on the first plane (111), the second static pressure chamber (42) is arranged on the second plane (112) opposite to the first plane (111), the third static pressure chamber (43) is arranged on the third plane (113) and the third plane (113) is adjacent to the first plane (111) and the second plane (112).

7. The hydrostatic slider according to claim 6, characterized in that: The static pressure slider further comprises a throttling device (60), and the oil inlet passage (20) comprises a first oil inlet (21) and a second oil inlet (22); The throttling device (60) is arranged between the first oil inlet (21) and the second oil inlet (22) and is connected to the oil inlet channel (20) to control the amount of oil flowing from the oil inlet channel (20) into the static pressure chamber (40).

8. The hydrostatic slider according to claim 7, characterized in that: The throttling device (60) comprises a first throttle (61) and a second throttle (62), one of the first throttle (61) and the second throttle (62) controls the amount of oil flowing from the oil inlet passage (20) into the first static pressure chamber (41) and the third static pressure chamber (43), and the other of the first throttle (61) and the second throttle (62) controls the amount of oil flowing from the oil inlet passage (20) into the second static pressure chamber (42); or, One of the first throttle (61) and the second throttle (62) controls the flow rate of the oil inlet passage (20) flowing into the second static pressure chamber (42) and the third static pressure chamber (43), and the other of the first throttle (61) and the second throttle (62) controls the amount of oil flowing from the oil inlet passage (20) into the first static pressure chamber (41).

9. The hydrostatic slider according to claim 6, characterized in that: The static pressure slider further comprises a first detection device (70) and a second detection device (80), wherein the first detection device (70) and the second detection device (80) are both arranged on the slider body (10), and the first detection device (70) is at least used to detect the hydraulic oil pressure of the first static pressure chamber (41) or the second static pressure chamber (42), and the second detection device (80) is at least used to detect the hydraulic oil pressure of the third static pressure chamber (43); or, The first detection device (70) is at least used to detect the hydraulic oil pressure of the third static pressure chamber (43), and the second detection device (80) is at least used to detect the hydraulic oil pressure of the first static pressure chamber (41) or the second static pressure chamber (42).

10. A machine tool, characterized in that: The machine tool comprises the hydrostatic slide according to any one of claims 1 to 9.

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