Hydrostatic guideway device

Abstract

A hydrostatic guideway device, comprising a guide rail (1) and a slider (2) which are slidably connected. The slider is internally provided with a slider body oil inlet channel (214) and a slider body oil return channel (215). The slider comprises: a slider body (21) and a pair of bearing bars (3), wherein the bottom end of the slider body is provided with an open slot, and the guide rail and the pair of bearing bars are both located in the open slot, one side of each bearing bar being fixedly connected to the slider body, and the other side of each bearing bar being slidably connected to the guide rail. The mating surfaces of the slider body, the bearing bars and the guide rail are adapted to each other, the clearance between the bearing bars and the guide rail forming an oil film bearing area (22). Since the slider is based on a split design, the slider body serves for installation, and the bearing bars serve for hydrostatic supporting and oil film clearance adjustment, thereby reducing the difficulty in manufacturing, measurement, and installation and adjustment of the hydrostatic slider. By freely configuring slider bodies with different opening sizes and bearing bars with different thicknesses, precise adjustment of the oil film clearance can be achieved, and the consistency of the oil film clearance of all sliders can be also ensured.

Description

Hydrostatic guide rail device

[0001] Cross-references to related applications

[0002] This application claims priority to Chinese patent application No. 2024117824619, filed on December 5, 2024, entitled “Liquid Static Rail Device”, which is incorporated herein by reference in its entirety. Technical Field

[0003] This application relates to the field of precision and ultra-precision machining technology, and in particular to a hydrostatic guide rail device. Background Technology

[0004] Hydrostatic guideways are guideway systems that utilize hydrostatic pressure to support and guide objects. They offer advantages such as high rigidity, low friction, long lifespan, and high precision, and are widely used in sub-micron precision machine tools and ultra-precision machine tools to meet the highest precision manufacturing requirements of the high-end CNC machine tool industry. Currently, they are the mainstream guideway type for achieving sub-micron precision and ultra-precision machining. Hydrostatic guideways also feature low coefficient of friction, excellent dynamic performance, high rigidity, wear-free operation, and long service life.

[0005] In existing technologies, hydrostatic guide rails mainly have two structures: T-shaped guide rails and U-shaped guide rails. A T-shaped guide rail consists of a T-shaped supporting fixed guide rail and an outer slider, which moves along the T-shaped supporting fixed guide rail. The oil chamber is distributed on the outer slider, which consists of a front sliding platform, a side sliding platform, and a rear sliding platform. A U-shaped guide rail structure consists of a slider, a sliding platform, and a U-shaped supporting fixed guide rail. The slider, carrying the sliding platform, moves along the U-shaped supporting fixed guide rail. The sliding platform consists of a moving slider and a follower slider. The U-shaped supporting fixed guide rail consists of a front fixed guide rail, a side fixed guide rail, and a rear fixed guide rail. The oil chamber is distributed on the moving slider.

[0006] However, the hydrostatic guide rails of the above two structural forms are difficult to install and adjust, and the oil film clearance is inconsistent. Summary of the Invention

[0007] This application provides a hydrostatic guide rail device to solve the defects of the prior art, such as difficult installation and adjustment and poor oil film clearance consistency.

[0008] This application provides a hydrostatic guide rail device, including a slidingly connected guide rail and a slider; the slider is provided with a slider body oil inlet channel and a slider body oil return channel; the slider includes:

[0009] The slider body and a pair of support bars are provided. The bottom end of the slider body is provided with an opening groove. The guide rail and the pair of support bars are both located in the opening groove. One side of the support bar is fixedly connected to the slider body, and the other side of the support bar is slidably connected to the guide rail.

[0010] The mating surfaces of the slider, the bearing strip, and the guide rail are compatible, and the gap between the bearing strip and the guide rail constitutes an oil film bearing area, which is connected to both the oil inlet channel and the oil return channel of the slider.

[0011] According to the hydrostatic guide rail device provided in this application, on the same side of the opening groove, the opening groove has an upper mating surface and a lower mating surface of the slider body; the bearing bar has a bearing bar throttling hole, a bearing bar bearing oil cavity, a bearing bar drain groove, and a bearing bar return groove on the opposite surfaces of the upper mating surface and the lower mating surface of the slider body, respectively; the end face of the bearing bar has a first bearing bar inlet and a second bearing bar inlet, both of which are connected to the oil inlet channel of the slider body; the first and second bearing bar inlets are sequentially connected to the bearing bar throttling hole, the bearing bar drain groove, and the bearing bar return groove; the bearing bar return groove is connected to the oil return channel of the slider body.

[0012] According to the liquid hydrostatic guide rail device provided in this application, multiple bearing strip throttling holes, bearing strip bearing oil chambers and bearing strip drain grooves are provided. Each bearing strip bearing oil chamber is provided with a bearing strip throttling hole, and the bearing strip drain groove is provided between adjacent bearing strip bearing oil chambers.

[0013] According to the liquid hydrostatic guide rail device provided in this application, the bearing bar has a symmetrical structure.

[0014] According to the hydrostatic guide rail device provided in this application, it further includes:

[0015] The first sealing plate is disposed at both ends of the slider body;

[0016] A second sealing plate is disposed at the bottom of the opening groove;

[0017] A pair of sealing strips are disposed at the bottom of the slider body, and the first sealing plate, the second sealing plate and the sealing strips seal the guide rail.

[0018] According to the liquid hydrostatic guide rail device provided in this application, the first sealing plate, the second sealing plate and the sealing strip are all transitionally fitted with the guide rail, and the first sealing plate, the second sealing plate and the sealing strip are all sealing structures with inner and outer double lips.

[0019] According to the hydrostatic guide rail device provided in this application, the slider body is provided with two oil inlet channels and two oil return channels, and also includes a distributor. The distributor is disposed at at least one end of the slider body, and the distributor is provided with multiple oil inlet ports and multiple oil return ports. Each oil inlet port is connected to the oil inlet channel of the slider body, and each oil return port is connected to the oil return channel of the slider body. One of the oil inlet ports is connected to an oil inlet nozzle, one of the oil return ports is connected to an oil return nozzle, and the remaining oil inlet ports and oil return ports are sealed with plugs.

[0020] According to the hydrostatic guide rail device provided in this application, a throttle is further included. An oil inlet chamber is provided on the joint surface of the throttle body and the bearing bar. The oil inlet sealing gasket of the bearing bar is pressed tightly against the end face of the bearing bar by the throttle, together forming the oil inlet chamber. The throttle is provided with a throttle oil inlet channel. Both the oil inlet chamber and the throttle oil inlet channel are connected to the oil inlet interface.

[0021] According to the hydrostatic guide rail device provided in this application, the interface between the distributor and the slider body is provided with the oil return chamber and an opening groove for installing the oil return chamber sealing gasket; the oil return chamber sealing gasket is pressed tightly against the two end faces of the slider body by the distributor, forming the independently sealed oil return chamber; the distributor is provided with a distributor oil return channel, and both the oil return chamber and the distributor oil return channel are connected to the oil return interface.

[0022] According to the present application, a hydrostatic guide rail device is provided, wherein the plurality of oil inlet ports and the plurality of oil return ports are distributed on at least two sides of the distributor.

[0023] The hydrostatic guide rail device provided in this application consists of a slider body and a pair of support bars. The bottom end of the slider body has an open groove, within which the guide rail and the pair of support bars are located. One side of the support bar is fixedly connected to the slider, and the other side is slidably connected to the guide rail. The mating surfaces of the slider body, support bars, and guide rail are compatible, and the gap between the support bars and the guide rail constitutes the oil film bearing area. This oil film bearing area is connected to both the oil inlet and return channels. The slider body, composed of the slider body and support bars, is designed as a separate unit. The slider body serves as the installation unit, while the support bars provide hydrostatic support and adjust the oil film gap. This separation significantly reduces the difficulty of manufacturing, measuring, and assembling the hydrostatic slider, and effectively improves the control accuracy of the opening size of the central groove in the slider after the two components are combined. By freely configuring slider bodies with different opening sizes and support bars of different thicknesses, precise adjustment of the oil film gap can be achieved, ensuring the consistency of the oil film gap between each slider.

[0024] After the slider is manufactured, the assembly of the slider and the adjustment of the oil film gap consistency are completed in the factory. After leaving the factory, the user does not need to adjust the main body of the guide rail slider component. He / she only needs to assemble and adjust it according to the positioning and mounting surface of the guide rail and slider as required. This effectively solves the problems of difficult installation and adjustment of hydrostatic guide rail slider and difficulty in achieving oil film gap consistency.

[0025] Furthermore, the embedded support strip within the slider body separates the support area from the slider body, eliminating the need for any heat treatment processes and reducing material requirements and manufacturing complexity. The symmetrical structure of the support strip significantly simplifies the manufacturing of the oil cavity and oil passages, as well as the control of critical dimensions. During manufacturing, the slider body's dimensional accuracy is primarily controlled by the upper mounting surface, side mounting surfaces, and the V-groove opening. For the support strip, the thickness of the two symmetrical support surfaces is carefully controlled. In the assembly process, a pairing and adjustment principle is used for the slider body and support strip to ensure consistent oil film clearance between each slider, solving the challenge of mass production of hydrostatic guide rail sliders while effectively reducing costs.

[0026] Finally, by adding seals with bidirectional sealing lips to the upper and lower parts of the guide rail and the front and rear end faces of the slider body, the entire guide rail and slider body are sealed and isolated internally and externally. Combined with the oil return system, this achieves complete recovery of hydrostatic oil, preventing external contamination and effectively solving the problems of internal hydraulic oil leakage and external contamination. Simultaneously, by integrating independent, complex, and optimal oil inlet and return channels into the slider body, load-bearing strip, and front and rear distributors, and combining them with relevant sealing structures, the load-bearing and non-load-bearing areas are sealed and isolated. This allows for free configuration of the inlet and return ports in eight directions each, improving the convenience and autonomy of customer installation. Attached Figure Description

[0027] To more clearly illustrate the technical solutions in this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0028] Figure 1 is a cross-sectional view of the hydrostatic guide rail device provided in this application.

[0029] Figure 2 is an enlarged schematic diagram of a portion of the structure in Figure 1 provided in this application.

[0030] Figure 3 is a cross-sectional view of the slider body provided in this application.

[0031] Figure 4 is a schematic diagram of the liquid hydrostatic guide rail device provided in this application.

[0032] Figure 5 is a structural schematic diagram of the hydrostatic guide rail device provided in this application from another angle.

[0033] Figure 6 is an exploded view of the hydrostatic guide rail device provided in this application.

[0034] Figure 7 is a structural schematic diagram of the load-bearing strip provided in this application.

[0035] Figure 8 is a cross-sectional view of the load-bearing strip provided in this application.

[0036] Figure 9 is a schematic diagram of the shunt provided in this application.

[0037] Figure 10 is a side view of the shunt provided in this application.

[0038] Figure 11 is a top view of the shunt provided in this application.

[0039] Figure 12 is a cross-sectional view of AA in Figure 11.

[0040] Figure 13 is a cross-sectional view of BB in Figure 11.

[0041] Figure 14 is a side view of the slider body provided in this application.

[0042] Figure 15 is a cross-sectional view of CC in Figure 14.

[0043] Figure 16 is a cross-sectional view of DD in Figure 14.

[0044] Figure 17 is a schematic diagram of the installation structure of the diverter, guide rail and first sealing plate provided in this application.

[0045] Figure 18 is an enlarged schematic diagram of part of the structure in Figure 17.

[0046] Reference numerals: 1. Guide rail; 2. Slider; 21. Slider body; 22. Oil film bearing area; 3. Bearing strip; 4. Diverter; 5. First sealing plate; 6. Throttling device; 7. Sealing strip; 8. Second sealing plate; 9. Oil inlet; 10. Oil return; 11. Oil return chamber sealing gasket; 12. Bearing strip oil inlet sealing gasket; 13. Slider body oil inlet channel sealing ring; 110. Lower reference surface of guide rail; 120. Side reference surface of guide rail; 210. Side reference surface of slider; 211. Slider mounting hole; 212. Sealing plate mounting hole; 213. Upper reference surface of slider; 214. Slider body oil inlet channel; 215. Slider body oil return channel; 216. Upper mating surface of slider body; 217. Slider body mounting hole; 218. Lower mating surface of slider body; 219. Mounting threaded hole; 301. First screw; 302. Plug; 310. First oil inlet of the bearing strip; 311. Throttling hole of the bearing strip; 312. Bearing oil chamber of the bearing strip; 313. Oil drain groove of the bearing strip; 314. Oil return groove of the bearing strip; 315. Second oil inlet of the bearing strip; 316. Joint surface of the bearing strip; 317. Mounting hole of the bearing strip; 318. Bearing surface; 401. Second screw; 410. Upper oil return port; 411. Upper oil inlet; 412. Right oil return port; 413. Right side oil inlet; 414. Throttling device first oil inlet; 415. Diverter first oil inlet; 416. Diverter second oil inlet; 417. Throttling device second oil inlet; 418. Forward return oil inlet; 419. Forward oil inlet; 420. Return oil chamber; 421. Slider body oil inlet; 423. Throttling device oil inlet channel; 424. Sealing gasket groove; 425. Diverter oil inlet chamber; 426. Left side oil return port; 427. Diverter oil return channel; 428. Slider body oil return port; 429. Left side oil inlet; D1. Oil film gap in the bearing area; D2. Bearing strip thickness; D3. Slider body opening size. Detailed Implementation

[0047] To make the objectives, technical solutions, and advantages of this application clearer, the technical solutions of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0048] In the description of the embodiments of this application, it should be noted that the terms "center," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing the embodiments of this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the embodiments of this application. In addition, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0049] The hydrostatic guide rail device of this application is described below with reference to Figures 1-18.

[0050] As shown in Figures 1, 2, 3, and 4, the hydrostatic guide rail device provided in this application includes a guide rail 1 and a slider 2. The slider 2 has a slider body oil inlet channel 214 and a slider body oil return channel 215. The slider 2 includes a slider body 21 and a pair of support bars 3. The bottom end of the slider body 21 has an open groove. The guide rail 1 and the pair of support bars 2 are both located in the open groove. One side of the support bar 3 is fixedly connected to the slider body 21, and the other side of the support bar 3 is slidably connected to the guide rail 1. The mating surfaces of the slider body 21, the support bars 3, and the guide rail 1 are compatible, and the gap between the support bars 3 and the guide rail 1 forms an oil film bearing area 22. The oil film bearing area 22 is connected to both the slider body oil inlet channel 214 and the slider body oil return channel 215.

[0051] As shown in Figure 3, specifically, the slider body 21 is provided with a slider mounting hole 211 for mounting the slider body 21. The slider body 21 is also provided with a slider mounting hole 217 for mounting the support bar 3 onto the slider body 21.

[0052] As shown in Figures 1, 2, 3, 7, and 8, the support bar 3 is connected to the opening slot of the slider body 21 by the first screw 301. After the slider body 21, support bar 3, and guide rail 1 are combined, they form four symmetrically distributed support areas. The oil film gap D1 of the oil film support area 22 is the core control parameter in the assembly and adjustment of the hydrostatic guide rail. With the above split design scheme, the manufacturing of the slider body 21 focuses on controlling the opening size D3 of the middle V-groove, and the support bar 3 focuses on controlling the thickness size D2. The thickness deviation of the two parts of the support bar 3 can be controlled within a very small range. Since the guide rail 1 can achieve high-precision dimensional control, only the inner cavity opening size of the assembled slider needs to be controlled during the assembly process. The inner cavity opening size after assembly is jointly controlled by the slider body and the support bar. The assembler can use the pairing principle to adjust the oil film gap of a single slider and control the oil film gap of multiple sliders. Users do not need to adjust the slider body 21; they only need to assemble and adjust the hydrostatic guide rail slider as a whole according to the technical requirements via the guide rail side reference surface 120, the guide rail lower reference surface 110, the slider side reference surface 210, and the slider upper reference surface 213. This effectively solves the problems of difficult assembly and adjustment of the hydrostatic guide rail slider and difficulty in achieving consistent oil film clearance.

[0053] As shown in Figures 3-8, in a feasible embodiment of this application, on the same side of the opening groove, the opening groove has an upper mating surface 216 and a lower mating surface 218 of the slider body; the bearing strip 3 has a bearing strip throttling hole 311, a bearing strip bearing oil cavity 312, a bearing strip drain groove 313, and a bearing strip return groove 314 on the opposite surfaces of the upper mating surface 216 and the lower mating surface 218 of the slider body, respectively; the end face of the bearing strip 3 has a first bearing strip oil inlet 310 and a second bearing strip oil inlet 315, both of which are connected to the slider body oil inlet channel 214; the first bearing strip oil inlet 310 and the second bearing strip oil inlet 315 are connected in sequence to the bearing strip throttling hole 311, the bearing strip drain groove 313, and the bearing strip return groove 314; the bearing strip return groove 314 is connected to the slider body return channel 215. The slider body 21 mainly undertakes the installation function of the support bar 3, and does not require heat treatment, which reduces the material requirements of the slider body 21.

[0054] As shown in Figures 2, 3, 7, and 8, more specifically, the support strips 3 are designed with a symmetrical structure, and each support strip 3 has two support surfaces between it and the guide rail 1. Support strip mounting holes 317 are also provided on the support strips 3. A first screw 301 passes through the slider mounting hole 217 and the support strip mounting hole 317 to fix the slider body 21 and the support strip 3.

[0055] In the above embodiments, the slider body 21 mainly undertakes the installation function of the bearing strip 3 and does not require heat treatment, thus reducing the material requirements of the slider body 21. At the same time, the upper mating surface 216 and the lower mating surface 218 of the slider body are easier to process and control in terms of form and position tolerances. As the core component of the bearing, the bearing strip 3 requires high-carbon steel for heat treatment to improve its performance. Its symmetrical structural design greatly reduces the difficulty of manufacturing and measurement. The oil film gap D1 of the bearing area formed by the slider body 21, the bearing strip 3 and the guide rail 1 after assembly is a key dimension for the assembly and adjustment control of the hydrostatic guide rail. The integrated slider design results in a narrow tolerance zone for the opening size of the slider's central groove, which is difficult to process, has poor manufacturability and high cost. By adopting the split design scheme of this case, the size of the central opening groove D3 of the slider body 21 and the thickness D2 of the two symmetrical bearing surfaces of the bearing strip 3 are controlled separately. Through the matching principle, a narrower oil film gap tolerance zone can be ultimately achieved, improving the accuracy of the hydrostatic guide rail. At the same time, the dimensional accuracy requirements of individual parts are reduced, improving manufacturing feasibility and reasonable cost control. Meanwhile, the split design can achieve consistency in the oil film gap between each slider through a pairing adjustment method, thus solving the problem of mass production of hydrostatic guide sliders as a whole.

[0056] As shown in Figures 4-6, in a feasible embodiment of this application, a first sealing plate 5, a second sealing plate 8, and a pair of sealing strips 7 are further included. The first sealing plate 5 is disposed at both ends of the slider body 21; the second sealing plate 8 is disposed at the bottom of the opening groove; as shown in Figure 2, the pair of sealing strips 7 are disposed at the bottom of the slider body 21, and the sealing strips 7 are sealed to the guide rail 1. Specifically, a sealing plate mounting hole 212 can be provided on the top side of the opening groove of the slider body 21 for installing the second sealing plate 8; a mounting threaded hole 219 can be provided on the bottom side of the opening groove of the slider body 21 for installing the sealing strips 7. The pair of sealing strips 7 are arranged in parallel. The first sealing plate 5, the second sealing plate 8, and the sealing strips 7 are all transitionally fitted with the guide rail 1, and the first sealing plate 5, the second sealing plate 8, and the sealing strips 7 are all sealing structures with inner and outer double-lip characteristics. After transitioning with guide rail 1, the sealing lip is pressed against the guide rail mating surface by its own deformation. The inner lip can prevent the oil inside slider 2 from leaking out, and the outer lip can prevent external contamination from entering and causing oil contamination problems, thus achieving the overall internal and external sealing and isolation of the slider.

[0057] As shown in Figures 4-6, in a feasible embodiment of this application, a flow divider 4 and a flow throttle 6 are also included, and two slide body oil inlet channels 214 and two slide body oil return channels 215 are provided on the slide body 21.

[0058] As shown in Figures 9-18, preferably, the distributor 4 is disposed at both ends of the slider body 21. The distributor 4 is provided with multiple oil inlet ports and multiple oil return ports. The oil inlet ports are all connected to the oil inlet channel 214 of the slider body, and the oil return ports are all connected to the oil return channel 215 of the slider body. One oil inlet port is connected to the oil inlet nozzle 9, and one oil return port is connected to the oil return nozzle 10. The remaining oil inlet ports and oil return ports are all blocked by plugs 302.

[0059] The interface between the distributor 4, the slider body 21, and the support bar 3 is provided with a distributor inlet chamber 425. The support bar inlet sealing gasket 12 is pressed tightly against the end face of the support bar 3 by the distributor 4, together forming the distributor inlet chamber 425 isolated from the return chamber 420. After the oil enters the throttle inlet channel 423 through any inlet on the distributor 4, it enters the four throttles 6 through the first throttle inlet 414 and the second throttle inlet 417. The throttles 6 complete the flow through each channel. After the flow rate of the oil is adjusted, it enters the oil inlet chambers 425 of the four bearing bars 3 through the first oil inlet 415 and the second oil inlet 416 of the distributor, respectively. Then, it enters and is distributed to several bearing bar throttling holes 311 on the bearing surface through the first oil inlet 310 and the second oil inlet 315 of the bearing bar. After being depressurized from the bearing oil chamber 312 of the bearing bar, it flows into the bearing bar return oil groove 314 through the bearing bar drain groove 313, thus forming the oil inlet circuit of the slider 2 system.

[0060] The interface between the distributor 4 and the slider body 21 is provided with an oil return chamber 420 and a sealing gasket groove 424 for installing the oil return chamber sealing gasket 11. The oil return chamber sealing gasket 11 is pressed tightly against the front and rear end faces of the slider body 21 by the distributor 4, forming four independently sealed oil return chambers 420. The above four independent oil return chambers 420 are connected through the distributor oil return channel 427 and the slider body oil return channel 215 on the slider body 21, forming the oil return circuit of the slider 2 system.

[0061] In summary, as shown in Figures 1-18, this application provides a hydrostatic guide rail device, including a guide rail 1 and a slider 2. The slider 2 can perform ultra-precise linear motion along the guide rail 1. The slider 2 consists of a slider body 21, a support bar 3, a flow divider 4, a first sealing plate 5, a throttle 6, a lower sealing bar 7, a second sealing plate 8, an oil inlet 9, an oil return inlet 10, an oil return chamber sealing gasket 11, a support bar oil inlet sealing gasket 12, and a slider body oil inlet channel sealing ring 13.

[0062] The support bar 3 integrates symmetrical support surfaces 318, support bar mating surfaces 316, support bar oil bearing chambers 312, support bar throttling holes 311, support bar first oil inlet 310, and support bar oil return grooves 314. The support bar 3 is connected to the upper mating surface 216 and lower mating surface 218 of the slider body on both sides of the middle groove of the slider body 21 by the first screw 301. Together, they constitute a hydrostatic support structure. By configuring slider bodies 21 with different opening sizes D3 and support bars 3 with different thicknesses D2, the consistency of the oil film gap thickness D1 of each slider 2 can be ensured. The independent design of the support bar 3 and the slider body 21 reduces the manufacturing difficulty, measurement difficulty, and accuracy requirements of the slider, and solves the problems of difficulty in adjusting the hydrostatic guide rail slider and controlling the consistency of the oil film gap, as well as the problems of mass production.

[0063] The distributor 4 is installed on the front and rear end faces of the slider body 21 by the second screw 401. The distributor 4 has multiple oil inlet ports and multiple oil return ports, namely, forward oil return port 418, forward oil inlet port 419, right oil return port 412, right oil inlet port 413, left oil return port 426, left oil inlet port 429, upper oil return port 410, and upper oil inlet port 411, for a total of eight oil inlet and outlet ports for customers to select and configure freely. The throttle integrates the throttle oil inlet channel 423 and the distributor oil return channel 427. The slider body 21 has two slider body oil inlet channels 214 and slider body oil return channels 215 that connect the slider body oil inlet port 421 and slider body oil return port 428 at the front and rear of the two distributors 4, respectively. The combination of the two can realize the flow of oil through all the oil inlet and outlet ports. Throttling device 6 is connected to distributor 4 by screws. The oil inlet of throttle device 6 is connected to the first oil inlet 414 and the second oil inlet 417 of throttle device 4. After passing through throttle device 6, the oil enters the first oil inlet 310 of the bearing bar from the oil inlet chamber 425 of the distributor, and finally flows out from the multiple bearing oil chambers 312 on the bearing bar 3, forming the bearing surface of the hydrostatic guide rail. Through the oil circuit distribution of throttle device 6, the hydraulic oil in the four bearing areas of the hydrostatic slider can enter from the four throttle devices 6 installed on distributor 4, forming four independently adjustable oil channels. This allows the four throttle devices 6 to dynamically adjust the flow rate of the liquid entering the four bearing areas when the load changes, ensuring the stability of slider bearing capacity, oil film thickness, and accuracy. After the bearing oil is depressurized from the bearing area, it flows into the bearing bar return oil groove 314. A return oil chamber sealing gasket 11, a bearing strip oil inlet sealing gasket 12, and a slider body oil inlet channel sealing ring 13 are installed between the front and rear end faces of the distributor 4 and the slider body 21. Two parallel lower sealing strips 7 are installed on the lower part of the slider body 21. Two first sealing plates 5 are installed on the distributor 4 at the front and rear ends of the slider body 21, respectively. All of the above sealing components have a bidirectional sealing lip sealing structure, and the fit with the guide rail 1 is a transition fit. The sealing lip is deformed and pressed tightly against the guide rail mating surface. The above sealing structure realizes the isolation and sealing of the slider oil inlet channel, the return oil channel, and the outside of the slider, avoiding the risk of oil leakage and external contaminant entry. At the same time, it realizes the free selection of the inlet and return oil interfaces, improving the convenience of installation.

[0064] In the description of the embodiments of this application, it should be noted that, unless otherwise explicitly specified and limited, the terms "connected" and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in the embodiments of this application according to the specific circumstances.

[0065] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "method," "specific method," or "some methods," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or method is included in at least one embodiment or method of the present application. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or method. Furthermore, the specific features, structures, materials, or characteristics described may be combined in a suitable manner in any one or more embodiments or methods. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or methods described in this specification, as well as the features of different embodiments or methods.

[0066] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this application, and are not intended to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this application.

Claims

1. A hydrostatic guide rail device, comprising a slidingly connected guide rail (1) and a slider (2); the slider (2) is provided with a slider body oil inlet channel (214) and a slider body oil return channel (215); the slider (2) comprises: The slider (21) and a pair of support bars (3) are provided with an opening groove at the bottom end of the slider (21). The guide rail (1) and the pair of support bars (3) are both located in the opening groove. One side of the support bar (3) is fixedly connected to the slider (21), and the other side of the support bar (3) is slidably connected to the guide rail (1). The mating surfaces of the slider (21), the bearing strip (3), and the guide rail (1) are compatible, and the gap between the bearing strip (3) and the guide rail (1) constitutes the oil film bearing area (22). The oil film bearing area (22) is connected to the oil inlet channel (214) of the slider and the oil return channel (215) of the slider.

2. The hydrostatic guide rail device according to claim 1, wherein, On the same side of the opening groove, the opening groove has an upper mating surface (216) and a lower mating surface (218) of the slider body; the bearing strip (3) has a bearing strip throttling hole (311), a bearing strip bearing oil cavity (312), a bearing strip drain groove (313), and a bearing strip return groove (314) on the opposite surfaces of the upper mating surface (216) and the lower mating surface (218) of the slider body, respectively; the end face of the bearing strip (3) has a bearing strip first oil inlet (310) and a bearing strip... The second oil inlet (315) is connected to the oil inlet channel (214) of the slider body, and the first oil inlet (310) and the second oil inlet (315) of the support bar are both connected to the oil inlet channel (214) of the slider body. The first oil inlet (310) and the second oil inlet (315) of the support bar are connected to the throttling hole (311), the oil drain groove (313) of the support bar and the oil return groove (314) of the support bar in sequence. The oil return groove (314) of the support bar is connected to the oil return channel (215) of the slider body.

3. The hydrostatic guide rail device according to claim 1 or 2, wherein, Multiple bearing strip throttling holes (311), bearing strip bearing oil chambers (312), and bearing strip oil drain grooves (313) are provided. Each bearing strip bearing oil chamber (312) is provided with a bearing strip throttling hole (311), and adjacent bearing strip bearing oil chambers (312) are provided with bearing strip oil drain grooves (313).

4. The hydrostatic guide rail device according to claim 2 or 3, wherein, The bearing strip (3) has a symmetrical structure.

5. The hydrostatic guide rail device according to claim 1, further comprising: The first sealing plate (5) is disposed at both ends of the slider body (21); The second sealing plate (8) is disposed at the bottom of the opening groove; A pair of sealing strips (7) are disposed at the bottom of the slider body (21), and the first sealing plate (5), the second sealing plate (8), and the pair of sealing strips (7) are all sealed with the guide rail (1).

6. The hydrostatic guide rail device according to claim 5, wherein, The first sealing plate (5), the second sealing plate (8) and the sealing strip (7) are all transitionally fitted with the guide rail (1), and the first sealing plate (5), the second sealing plate (8) and the sealing strip (7) are all sealing structures with inner and outer double lips.

7. The hydrostatic guide rail device according to claim 1, wherein, The slider body (21) is provided with two slider body oil inlet channels (214) and two slider body oil return channels (215), and also includes a distributor (4). The distributor (4) is provided at both ends of the slider body (21). The distributor (4) is provided with multiple oil inlet ports and multiple oil return ports. The oil inlet ports are all connected to the slider body oil inlet channels (214), and the oil return ports are all connected to the slider body oil return channels (215). One of the oil inlet ports is connected to the oil inlet nozzle (9), and one of the oil return ports is connected to the oil return nozzle (10). The remaining oil inlet ports and oil return ports are all blocked with plugs (302).

8. The hydrostatic guide rail device according to claim 7 further includes a throttle (6), wherein the distributor (4) has an oil inlet cavity (425) on the mating surface with the slider body (21) and the support bar (3), and the oil inlet sealing gasket (12) of the support bar is pressed tightly by the distributor (4) on the end face of the support bar (3) to form the oil inlet cavity (425); the throttle (6) is provided with a throttle oil inlet channel (423), and the oil inlet cavity (425) and the throttle oil inlet channel (423) are both connected to the oil inlet interface.

9. The hydrostatic guide rail device according to claim 7 or 8, wherein, The interface between the distributor (4) and the slider (21) is provided with an oil return chamber (420) and an opening groove for installing the oil return chamber sealing gasket (11); the oil return chamber sealing gasket (11) is pressed tightly by the distributor (4) onto both ends of the slider (21) to form an independently sealed oil return chamber (420); the distributor (4) is provided with a distributor oil return channel (427), and both the oil return chamber (420) and the distributor oil return channel (427) are connected to the oil return interface.

10. The hydrostatic guide rail device according to any one of claims 7 to 9, wherein, The plurality of oil inlet ports and the plurality of oil return ports are distributed on at least two sides of the distributor (4).

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