Hydrostatic slide and machine tool

Abstract

This invention discloses a hydrostatic slider and a machine tool. The hydrostatic slider includes a slider body. The slider body is provided with an oil inlet channel, an oil outlet channel, and a hydrostatic chamber. The hydrostatic chamber includes a first plane disposed outside the slider body, a first chamber, and a second chamber surrounding the outer periphery of the first chamber. The oil inlet channel communicates with the second chamber, and the oil outlet channel communicates with the first chamber. A first support portion flush with the first plane is disposed between the first chamber and the second chamber. The hydrostatic slider of this application can at least solve the problems of poor heat dissipation performance and low load-bearing capacity of hydrostatic sliders.

Description

Technical Field

[0001] This invention relates to the field of guide rail technology, and more specifically, to a hydrostatic slider and a machine tool. Background Technology

[0002] A hydrostatic slider is a slider device that utilizes the principle of hydrostatic pressure to form an oil film between the working surface of the slider and the relatively moving parts. This oil film has a certain pressure, which allows the moving parts to suspend on the oil film and perform relative motion. Hydrostatic sliders occupy a pivotal position in the field of precision machine tools due to their numerous advantages, including high load-bearing capacity, high power transmission efficiency, long service life, and low structural precision requirements.

[0003] The heat dissipation capacity of ordinary hydrostatic sliders is limited by their structure. When the hydrostatic slider moves, heat is generated inside the oil chamber due to friction and other reasons. The oil return method of ordinary hydrostatic sliders is singular, relying solely on the sealing edge of the outer ring of the oil chamber for oil return. This single oil return method often results in the heat generated inside the oil chamber not being dissipated in time, leading to a gradual increase in the oil temperature. This increased oil temperature leads to a series of adverse consequences. For example, due to temperature differences in different parts of the hydrostatic slider, thermal stress is generated inside the slider. The generation of thermal stress may cause bending or torsional deformation of the hydrostatic slider, thereby reducing the slider's motion accuracy and smoothness, and ultimately affecting the stability of the entire mechanical system.

[0004] Furthermore, the static load-bearing capacity of ordinary hydrostatic slides is limited by their structure and material strength. When the hydrostatic slide is in an unlubricated state, resting on the machine tool base under a large load, the contact area between the slide and the base is relatively small. Therefore, the pressure per unit area on the slide is high. Once the pressure per unit area exceeds the allowable pressure of the hydrostatic slide, indentations will appear on its surface. These indentations alter the geometry of the slide, reducing not only its motion accuracy but also its load-bearing capacity and service life. Summary of the Invention

[0005] The main objective of this invention is to provide a hydrostatic slider and machine tool, which at least solves 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, a hydrostatic slider is provided, comprising:

[0007] The slider body is provided with an oil inlet channel, an oil outlet channel, and a static pressure chamber. The static pressure chamber includes a first plane disposed outside the slider body, a first chamber, and a second chamber surrounding the outer periphery of the first chamber. The oil inlet channel communicates with the second chamber, the oil outlet channel communicates 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] Furthermore, the oil outlet channel includes a first oil outlet, a second oil outlet, a first channel section, and a second channel section;

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

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

[0011] Furthermore, along the length of the rectangle, the second chamber is provided with a plurality of spaced-apart clearance holes, and along the width 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] Furthermore, the static pressure chamber includes multiple chambers, and the slider body includes multiple working planes;

[0013] Each of the static pressure chambers is respectively disposed on each of the working planes.

[0014] Furthermore, 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 disposed on the first plane, the second static pressure chamber is disposed on the second plane opposite to the first plane, and the third static pressure chamber is disposed on the third plane, which is adjacent to the first plane and the second plane.

[0016] Furthermore, the hydrostatic slider also includes a throttling device, and the oil inlet channel includes a first oil inlet and a second oil inlet;

[0017] The throttling device is located between the first oil inlet and the second oil inlet and is connected to the oil inlet channel to control the amount of oil flowing into the static pressure chamber through the oil inlet channel.

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

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

[0020] Furthermore, the hydrostatic slider also includes a first detection device and a second detection device, both of which are disposed on the slider body. The first detection device is used at least to detect the hydraulic oil pressure in the first or second hydrostatic chamber, and the second detection device is used at least to detect the hydraulic oil pressure in the third hydrostatic chamber; or...

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

[0022] On the other hand, this application also mentions a machine tool that includes the aforementioned hydrostatic slide block.

[0023] In this invention, the slider body is provided with a first chamber and an oil outlet channel communicating with the first chamber, and a first support portion flush with the first plane is provided around the first chamber. This allows the hydrostatic slider of this application to solve the problems of poor heat dissipation performance and low load-bearing capacity of hydrostatic sliders. 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 of the second chamber to the outside of the hydrostatic chamber, while 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, because the hydraulic oil has a certain pressure, and the hydraulic oil can form an oil film of a certain thickness on the first plane of the hydrostatic slider, the hydrostatic slider is separated from the predetermined component (the predetermined component can be a guide rail, machine tool base, machine tool worktable, etc.), which can prevent wear between the hydrostatic slider and the predetermined component during relative movement. When the hydrostatic slider is not working, it is in a stationary state. At this time, no hydraulic oil is supplied to the hydrostatic slider, and the hydrostatic slider is in direct contact with the predetermined component. Since the present application provides a first support part that is 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 also preventing dents from forming on the slider body.

[0024] In other words, compared with the existing hydrostatic slider, the hydrostatic slider of this application can not only avoid the formation of dents on the slider body, but also increase the return oil path of the hydrostatic slider by setting an oil outlet channel, 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 due to the gradual increase of oil temperature inside the hydrostatic chamber. Attached Figure Description

[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 This is a structural diagram of the machine tool as shown in the first view according to an embodiment of the present invention;

[0027] Figure 2 This is an exploded view of the machine tool from a second-view perspective, as disclosed in an embodiment of the present invention.

[0028] Figure 3 This is a structural diagram of the hydrostatic slider disclosed in an embodiment of the present invention when viewed from a third-person perspective;

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

[0030] Figure 5 This is a structural diagram of the static pressure chamber disclosed in an embodiment of the present invention from a fourth-view perspective;

[0031] Figure 6 This is a structural diagram of the hydrostatic slider disclosed in an embodiment of the present invention when viewed from a fifth perspective;

[0032] Figure 7 This is a structural diagram of the hydrostatic slider disclosed in an embodiment of the present invention when viewed from a fourth perspective.

[0033] The above figures 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. a) Two chambers; b) Second center line; c) Third center line; D) Spacing; W) Width; 413) First support part; z) First direction; y) Length direction; x) Width direction; 42) Second static pressure chamber; 43) Third static pressure chamber; 50) Clearance 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 Implementation

[0035] It should be noted that, unless otherwise specified, the embodiments and features described in the present invention can be combined with each other. The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

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

[0037] Unless otherwise specifically stated, the relative arrangement, numerical expressions, and values ​​of the components and steps set forth in these embodiments do not limit the scope of the invention. It should also be understood that, for ease of description, the dimensions of the various parts shown in the drawings are not drawn to actual scale. Techniques, methods, and devices known to those skilled in the art may not be discussed in detail, but where appropriate, such techniques, methods, and devices should be considered part of the specification. In all examples shown and discussed herein, any specific values ​​should be interpreted as merely exemplary and not as limitations. Therefore, other examples of exemplary embodiments may have different values. It should be noted that similar reference numerals and letters in the following figures denote similar items; therefore, once an item is defined in one figure, it need not be further discussed in subsequent figures.

[0038] To address the problems of poor heat dissipation and low load-bearing capacity of hydrostatic sliders, an embodiment of this application provides a hydrostatic slider. The hydrostatic slider of this application will be described in detail below with reference to the accompanying drawings.

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

[0040] 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 disposed 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 to the second chamber 412, and the oil outlet channel 30 is connected to the first chamber 411. A first support portion 413 flush with the first plane 111 is disposed between the first chamber 411 and the second chamber 412.

[0041] In this application, the slider body 10 is provided with a first chamber 411 and an oil outlet channel 30 communicating with the first chamber 411. A first support portion 413, flush with the first plane 111, is provided around the first chamber 411. This allows the hydrostatic slider of this application to solve the problems of poor heat dissipation and low load-bearing capacity of hydrostatic sliders. 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. A portion of the hydraulic oil flows out from the outer edge of the second chamber 412 to the outside of the hydrostatic chamber 40, while another portion 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, due to the pressure of the hydraulic oil, an oil film of a certain thickness can be formed on the first plane 111 of the hydrostatic slider, thereby separating the hydrostatic slider from the predetermined component (which may be a guide rail, machine tool base, or machine tool worktable, etc.), thus preventing wear between the hydrostatic slider and the predetermined component during relative movement. When the hydrostatic slider is not working, it is stationary and no hydraulic oil is supplied. The hydrostatic slider is in direct contact with the predetermined component. Since the present application provides a first support portion 413 flush with the first plane 111 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 preventing dents from forming on the slider body 10.

[0042] In other words, compared with the existing hydrostatic slider, the hydrostatic slider of this application can not only avoid the formation of dents on the slider body 10, but also increase the return oil path of the hydrostatic slider by setting the oil outlet channel 30, 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 due to the gradual increase of oil temperature inside the hydrostatic chamber 40.

[0043] For example, see Figure 5 and Figure 7As shown, under the same hydraulic oil type (VG46), the same movement speed (v=60m / min), the same load (F=10000N), and the same throttle parameters (Ps=3.2MPa, Q0=30ml / min, Kr=2.185) for the first and second throttles mentioned below, compared with the hydrostatic slider of this application, which is of the same size but without an oil outlet channel 30, a first chamber 411, and a first support 413, the hydrostatic slider of this application, by reasonably setting the dimensions of the oil outlet channel 30, the first chamber 411, and the first support 413, can increase the static load-bearing capacity of the hydrostatic chamber by 46.5%, increase the oil film stiffness by 44.7%, and reduce the oil temperature rise by 14%. The improvement of these parameters fully demonstrates that the hydrostatic slider of this application has significant advantages over the existing hydrostatic slider in terms of the aforementioned performance, thereby solving the problems of poor heat dissipation performance and low load-bearing capacity of hydrostatic sliders.

[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 is perpendicular to the axis of the second channel section 34. The first oil outlet 31 is located at the end of the first channel section 33 away from the second channel section 34 and is located within the first chamber 411. The second oil outlet 32 ​​is located at the end of the second channel section 34 away from the first channel section 33 and is located outside the static pressure chamber 40.

[0045] Specifically, this application adopts a configuration where the first channel segment 33 and the second channel segment 34 are connected, and the axis of the first channel segment 33 is perpendicular to the axis of the second channel segment 34. This configuration has two significant advantages. First, since drilling is required when machining the oil outlet channel 30 on the slider body 10, the perpendicularity of the axes of the first channel segment 33 and the second channel segment 34 simplifies the machining process and makes it easier to manufacture. Therefore, this configuration can reduce production costs to a certain extent. Second, since hydraulic oil has a certain viscosity, the perpendicularity of the axes of the first channel segment 33 and the second channel segment 34 in the hydrostatic slider of this application can change the flow direction of the hydraulic oil in the oil outlet channel 30. This can better limit the outflow velocity of the hydraulic oil, keeping it within a reasonable range. This avoids insufficient oil film thickness between the hydrostatic slider and the predetermined component due to excessive hydraulic oil outflow velocity, thereby preventing the load-bearing capacity of the hydrostatic slider from being affected during operation.

[0046] Furthermore, this application employs a configuration where the oil inlet channel 20 is connected to the second chamber 412 and the oil outlet channel 30 is connected to the first chamber 411, rather than a configuration where the oil inlet channel 20 is connected to the first chamber 411 and the oil outlet channel 30 is connected to the second chamber 412, or where both the oil inlet channel 20 and the oil outlet channel 30 are connected to either the first chamber 411 or the second chamber 412. This is because if the configuration where the oil inlet channel 20 is connected to the first chamber 411 and the oil outlet channel 30 is connected to the second chamber 412 were adopted, the oil volume in the second chamber 412 would drop sharply (because the hydraulic oil in the second chamber 412 could originally flow out from the outer edge of the second chamber 412 to the outside of the hydrostatic chamber 40), resulting in insufficient load-bearing capacity of the hydrostatic slider during operation. If both the inlet channel 20 and the outlet channel 30 are connected to the first chamber 411, the hydraulic oil may flow directly out of the outlet channel 30 instead of flowing from the surface of the first support 413 into the second chamber 412, which could severely affect the load-bearing capacity of the hydrostatic slider during operation. If both the inlet channel 20 and the outlet channel 30 are connected to the second chamber 412, the oil volume in the second chamber 412 may drop sharply, which could also severely affect the load-bearing capacity of the hydrostatic slider during operation. Furthermore, this configuration could prevent the hydraulic oil in the first chamber 411 from being discharged.

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

[0048] Specifically, the first direction is Figure 3 The direction indicated by z. In this embodiment, both the static pressure cavity 40 and the first chamber 411 are rectangular. In other embodiments of this application, the static pressure cavity 40 and the first chamber 411 can also be square, circular, or elliptical, etc. That is, the shapes of the static pressure cavity 40 and the first chamber 411 can be reasonably adjusted according to the approximate shape of the static pressure slider and actual needs. In this embodiment, since the shape of the static pressure slider shown in this embodiment is approximately cuboid, in order to ensure the stability of the static pressure slider during operation and the uniformity of the oil film distribution on the surface of the static pressure slider, the static pressure cavity 40 and the first chamber 411 are specifically set to be rectangular in projection in the first direction, based on the cuboid 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 of the rectangle, this application adopts a collinear design for the first midline a of the static pressure chamber 40 and the first chamber 411. That is, both the static pressure chamber 40 and the first chamber 411 are symmetrical about the first midline a. This ensures that the first chamber 411 and the first support 413 are both located in the middle of the rectangle along its length. Furthermore, this arrangement ensures that after hydraulic oil is supplied to the static pressure slider, the oil film area and thickness on both sides separated by the first midline a are consistent. This prevents the static pressure slider from experiencing unequal forces on both sides separated by the first midline a during operation.

[0049] Further, see Figure 3 , Figure 5 as well as Figure 7 As shown, along the length of the rectangle, the second chamber 412 is provided with a plurality of spaced clearance holes 50. Along the width 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 direction indicated by x in the middle. The main function of the clearance hole 50 is to fix the hydrostatic slider to other structures (such as machine tool bases and worktables). Along the length of the rectangle (i.e. Figure 7 The number of clearance holes 50 on both sides of the first center line a is equal (in the direction indicated by y in the figure), meaning that the clearance holes 50 on both sides of the first center line a are symmetrically arranged about the first center line a. This arrangement is mainly to ensure that the static pressure slider is evenly stressed along the length of the rectangle after it is fixed to the machine tool base or worktable, preventing tilting. This is especially important when the static pressure slider is used in high-precision machine tools, where the design and processing requirements for the static pressure slider are even higher. In addition, to ensure that the end of the fixing member in the clearance hole 50 near the second chamber 412 does not protrude from the first plane 111 after the static pressure slider is installed by the fixing member (not shown in the figure), the clearance hole 50 is generally set as a countersunk hole. Moreover, the reason why this application adopts the arrangement that the distance D between the second center line b of the static pressure cavity 40 and the third center line c of the first chamber 411 is not greater than 1 / 3 of the width W of the static pressure cavity 40 is to avoid the first chamber 411 being tilted in the width direction of the rectangle (i.e., Figure 7If the distance D is too close to the edge of the hydrostatic slider (in the direction indicated by x), and the distance D is greater than 1 / 3 of the width W of the hydrostatic chamber 40, then the first chamber 411 is too close to the edge of the hydrostatic slider. This may cause uneven oil film thickness on both sides of the second bisector b of the hydrostatic chamber 40, which in turn causes inconsistent force on both sides of the second bisector b of the hydrostatic chamber 40. This can cause the hydrostatic slider to tilt during operation, affecting its normal operation and potentially damaging it in severe cases.

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

[0052] For example, the slider body 10 of this application may include one, two, or more working planes 11. Correspondingly, the hydrostatic slider may also include one, two, or more hydrostatic cavities 40, and the hydrostatic cavities 40 and the working planes 11 correspond one-to-one. This embodiment shows the case where the hydrostatic slider has three working planes 11 and three hydrostatic cavities 40. In other embodiments of this application, the number of working planes 11 and hydrostatic cavities 40 can be reasonably selected according to the shape of the hydrostatic slider and the working requirements, and the positions of the working planes 11 and hydrostatic cavities 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. 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 disposed on the first plane 111, the second static pressure chamber 42 is disposed on the second plane 112 opposite to the first plane 111, and the third static pressure chamber 43 is disposed on the third plane 113, with the third plane 113 adjacent to both 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 this application may each 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 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 can be filled with hydraulic oil with a certain pressure, thereby achieving the desired effect in the first direction (i.e., Figure 3 The hydrostatic slider is separated from the machine tool base and guide rails by an oil film formed on the first plane 111 and the second plane 112 (in the direction indicated by z). This prevents the machine tool base and guide rails from directly contacting the hydrostatic slider and avoids damage to it during operation. Furthermore, to ensure that the worktable and other structures connected to the hydrostatic slider do not obstruct movement in the width direction of the hydrostatic slider when moving on the machine tool base or guide rails (i.e., the direction indicated by z), an oil film is formed on both planes. Figure 4 as well as Figure 7 The slide block swings in the direction indicated by x. This application provides a third static pressure chamber 43 on the third plane 113 of the static pressure slide block, thus forming an oil film 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 combined action of the first static pressure chamber 41, the second static pressure chamber 42, and the third static pressure chamber 43, the worktable and other structures connected to the static pressure slide block are suspended on the machine tool base or guide rail, which is more conducive to the movement of the worktable and other structures on the machine tool base or guide rail.

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

[0056] Specifically, the throttling device 60 controls the movement speed of the hydrostatic slider. It also buffers the hydrostatic slider by slowing it down as it approaches the end of its stroke, and maintains the hydrostatic slider at a set pressure during operation. In actual operation, hydraulic oil enters the inlet channel 20 through the first inlet 21, then flows through the inlet channel 20 to the throttling device 60. After being regulated by the throttling device 60, the hydraulic oil finally enters each hydrostatic chamber 40 of the hydrostatic slider through the second inlet 22. In this embodiment, when hydraulic oil enters the first static pressure chamber 41 through the second 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). 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 part 413 which is flush with the first plane 111. Finally, it flows out to the outside of the first static pressure chamber 41 through the oil outlet 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, it finally flows out 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) to the outside of the second static pressure chamber 42 and the third static pressure chamber 43, respectively.

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

[0058] Exemplarily, this embodiment illustrates a scenario where the first throttle 61 controls the flow rate of oil from the inlet channel 20 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 from the inlet channel 20 into the first static pressure chamber 41. Furthermore, in this embodiment, the first throttle 61 is a combination of a thin-film feedback throttle and a slit throttle, and the second throttle 62 is a thin-film feedback throttle. In other embodiments of this application, the first throttle 61 and the second throttle 62 can also be fixed throttles, variable throttles, or plunger-type throttles. Of course, in other embodiments of this application, the static pressure slider can also be configured with a one-to-one correspondence between the throttle device 60 and the static pressure chamber 40, and the throttle devices 60 can be installed at different locations on the static pressure slider, or the throttle devices 60 can be uniformly placed in a fixed position on a structure such as a machine tool base. The reason why this embodiment uses a first throttle 61 composed of a thin-film feedback throttle and a slit throttle to control the flow rate of oil from the inlet channel 20 into the second static pressure chamber 42 and the third static pressure chamber 43 is that this arrangement 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 hydrostatic slider also includes a first detection device 70 and a second detection device 80. Both the first detection device 70 and the second detection device 80 are disposed on the slider body 10. The first detection device 70 is used to detect the hydraulic oil pressure of the first hydrostatic chamber 41 or the second hydrostatic chamber 42 at least, and the second detection device 80 is used to detect the hydraulic oil pressure of the third hydrostatic chamber 43 at least. Alternatively, the first detection device 70 is used to detect the hydraulic oil pressure of the third hydrostatic chamber 43 at least, and the second detection device 80 is used to detect the hydraulic oil pressure of the first hydrostatic chamber 41 or the second hydrostatic chamber 42 at least.

[0060] Specifically, in this application, it is not necessary to measure the hydraulic oil pressure of both the first static pressure chamber 41 and the second static pressure chamber 42; it is sufficient to measure the hydraulic oil pressure in only one of them. This is because the first static pressure chamber 41 and the second static pressure chamber 42 are located in two opposite positions, and the static pressure slider is in the first direction (i.e., Figure 3The hydraulic oil in the direction indicated by z is in a state of force balance. Therefore, by measuring the pressure of the hydraulic oil in only one of the first static pressure chamber 41 and the second static pressure chamber 42, the pressure of the other hydraulic oil can be determined, which can save costs and simplify the structure of the static pressure slider to a certain extent. This embodiment shows the case where the first detection device 70 is used to detect the hydraulic oil pressure in the first static pressure chamber 41 and the second detection device 80 is used to detect the hydraulic oil pressure in the third static pressure chamber 43. Moreover, in other embodiments of this application, a one-to-one correspondence can be adopted between the static pressure chamber 40 and the detection device (such as the first detection device 70 and the second detection device 80).

[0061] On the other hand, this application also mentions a machine tool that includes the aforementioned hydrostatic slide block.

[0062] Specifically, the machine tool described in this application can be a CNC milling machine, a precision grinding machine, a lathe, or a special-purpose machine tool. The hydrostatic slider of this application is used in machine tools because it not only possesses the advantages of existing hydrostatic sliders—high precision, low wear, high rigidity, and good damping characteristics—but also has advantages such as strong heat dissipation, high static load capacity, and resistance to damage. Furthermore, the hydrostatic slider of this application can also be applied to structures other than machine tools, such as conveyor devices.

[0063] For example, the machine tool in this embodiment generally includes a base 90, a pressure plate 91, and a machining table 100. When installing the hydrostatic slider onto the machine tool, firstly, a fastener is used to pass through the clearance 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 onto the machining table 100. Then, the two pressure plates 91 are fixed to the base 90 respectively. Finally, the machining table 100 with the hydrostatic slider is slid into and installed onto the base 90 with the pressure plate 91. The mating structure between the hydrostatic slider and the machining table 100 and the mating structure between the pressure plate 91 and the base 90 can form a mutually interlocking structure. Thus, when the machining table 100 slides on the base 90, due to the action of the hydrostatic slider, the machining table 100 and the base 90 can be separated by a hydraulic oil film, thereby preventing wear between the machining table 100 and the base 90. Furthermore, the two pressure plates 91 on the base 90 not only prevent the machining table 100 and the hydrostatic slider from falling off the base 90, but also ensure the stability between the machining table 100 and the base 90. In addition, since the second plane 112 of the hydrostatic slider is opposite to the pressure plate 91 during actual operation, the second plane 112 and the pressure plate 91 are also separated by an oil film, thereby preventing damage to the machine tool.

[0064] As can be seen from the above description, this application solves the problems of poor heat dissipation and low load-bearing capacity of static pressure sliders by setting a static pressure slider composed of slider body 10, oil inlet channel 20, oil outlet channel 30, static pressure chamber 40, clearance hole 50, throttling device 60, first detection device 70 and second detection device 80. In actual operation, hydraulic oil enters the oil inlet channel 20 through the first oil inlet 21. A portion 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 regulated by the first throttling device 61. Then, it 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 portion of the hydraulic oil in the oil inlet channel 20 flows into the first static pressure chamber 41 after being regulated by the second throttle 62. Immediately afterwards, a portion of the hydraulic oil in the first static pressure chamber 41 flows out along the outer edge of the second chamber 412. 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, which is 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. During this period, due to the action of the hydraulic oil, an 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. This prevents wear between the processing table 100 and the base 90. Furthermore, installing the hydrostatic slider of this application onto the machine tool can increase the machine tool's load-bearing capacity and improve its accuracy.

[0065] As can be seen, this application adds a first chamber 411 and an oil outlet channel 30 communicating with the first chamber 411 to the existing hydrostatic chamber 40, and a first support portion 413 flush with the first plane 111 is provided around the first chamber 411. This changes the structure of the hydrostatic chamber 40 and the oil return method of the existing hydrostatic slider. On the one hand, by increasing the oil return path, the heat dissipation efficiency of the hydrostatic slider is improved, solving a series of problems caused by the rise in hydraulic oil temperature. On the other hand, the internal structure of the hydrostatic chamber 40 is optimized by the first support portion 413, increasing the contact area between the hydrostatic slider and the base 90 and other structures, which improves the load-bearing capacity of the hydrostatic slider when it is stationary and not supplied with oil. This comprehensively improves the performance of the hydrostatic slider, ensuring the efficient and stable operation of precision machine tools and other equipment.

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

[0067] Furthermore, it should be noted that the use of terms such as "first" and "second" to define components is merely for the purpose of distinguishing the corresponding components. Unless otherwise stated, the above terms have no special meaning and therefore should not be construed as limiting the scope of protection of this invention.

[0068] The above are merely preferred embodiments of the present invention and are not intended to limit the present invention. Various modifications and variations can be made to the present invention by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. A hydrostatic slider, characterized in that, include: 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) disposed outside the slider body (10), a first chamber (411) and a second chamber (412) surrounding the first chamber (411). The oil inlet channel (20) communicates with the second chamber (412), and the oil outlet channel (30) communicates with the first chamber (411). A first support part (413) flush with the first plane (111) is provided between the first chamber (411) and the second chamber (412). In actual operation, hydraulic oil with a certain pressure enters the second chamber (412) of the static pressure chamber (40) through the oil inlet channel (20). A portion of the hydraulic oil flows out from the outer edge of the second chamber (412) to the outside of the static pressure chamber (40), while another portion of the hydraulic oil enters the first chamber (411) of the static pressure chamber (40) through the surface of the first support (413) and finally flows out to the outside of the static pressure chamber (40) through the oil outlet channel (30).

2. The hydrostatic slider according to claim 1, characterized in that, 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 segment (33) and the second channel segment (34) are connected and the axis of the first channel segment (33) is perpendicular to the axis of the second channel segment (34). The first oil outlet (31) is located at the end of the first channel segment (33) away from the second channel segment (34) and the first oil outlet (31) is located in the first chamber (411). The second oil outlet (32) is located at the end of the second channel segment (34) away from the first channel segment (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 cavity (40) and the first chamber (411) are both rectangular. Along the length of the rectangle, the first midline (a) of the static pressure cavity (40) and the first chamber (411) are collinear.

4. The hydrostatic slider according to claim 3, characterized in that, Along the length of the rectangle, the second chamber (412) is provided with a plurality of spaced clearance holes (50). Along the width 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).

5. The hydrostatic slider according to claim 1, characterized in that, The static pressure chamber (40) includes multiple chambers, and the slider body (10) includes multiple working planes (11). Each of the static pressure chambers (40) is respectively disposed 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), 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 disposed on the first plane (111), the second static pressure chamber (42) is disposed on the second plane (112) opposite to the first plane (111), and the third static pressure chamber (43) is disposed 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 hydrostatic slider also includes a throttling device (60), and the oil inlet channel (20) includes a first oil inlet (21) and a second oil inlet (22). The throttling device (60) is located 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 into the static pressure chamber (40) through the oil inlet channel (20).

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

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

10. A machine tool, characterized in that, The machine tool includes a hydrostatic slide block as described in any one of claims 1 to 9.

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