CN108080974A - A kind of railroad - Google Patents

Abstract

The slideway device of the present invention includes a slideway assembly and a sliding part, the slideway assembly includes a slideway with a sliding surface and an outer surface of the slideway, a plurality of static pressure bushes and a plurality of dynamic pressure bushes, and the slideway has a plurality of static pressure bushes The pressure channel and the dynamic pressure channel, the static pressure channel and the dynamic pressure channel are respectively arranged in the inner wall of the slideway and pass through the sliding surface and the outer surface of the slideway. The first concave cavity and the static pressure channel on the outer surface of the slideway. The dynamic pressure channel includes a second concave cavity set on the sliding surface and a dynamic pressure channel connected to the second concave cavity and the outer surface of the slideway. The static pressure bushing is provided At the opening of the first cavity and the opening of the static pressure cavity faces the sliding surface, the dynamic pressure bushing is arranged at the opening of the second cavity and the opening of the dynamic pressure cavity faces the sliding surface, the bottom of the dynamic pressure cavity is in contact with the second cavity The two cavities are connected, and the cross section of the dynamic pressure cavity gradually expands from the bottom to the opening.

Description

a slide rail device

technical field

The invention belongs to the field of machinery, and in particular relates to a slide rail device.

Background technique

With the need of ultra-precision, nanometerization and high-speed processing, higher requirements are put forward for the working characteristics of machine tools. As the main part of the machine tool, the dynamic and static characteristics of the guide rail directly affect the working characteristics of the machine tool.

Traditional hydrostatic guideways use a single layer of oil chambers. In order to resist the change of external load, the oil entering the oil chamber changes the pressure of the oil chamber to meet the requirements of the external load through the liquid resistance of the parallel plate gap that changes with the load change. When the load acting on the slider changes , especially when working under large load and partial load, the traditional hydrostatic guideway has seriously affected the accuracy of the machine tool.

According to the basic principles of gas (air) or liquid (oil) dynamic and static pressure technology, the liquid or gas medium enters the multiple chambers on the sliding surface of the slide rail respectively, and the gas or liquid dynamic and static pressure technology is combined with the guide rail. The advanced slide rail device can make up for the deficiency of the single hydrostatic technology, and is one of the effective ways to improve the dynamic and static characteristics of the guide rail at present.

However, the machining accuracy of the sliding surface and the chamber of the slide rail is high, and the machining cost is high.

Contents of the invention

The present invention is made to solve the above problems, and the purpose is to provide a slide rail device with low requirements on the machining accuracy of the sliding surface and the chamber of the slide rail, which can reduce the processing cost and has dynamic pressure and static pressure technology.

The present invention provides a slideway device, which is characterized in that it includes: a slideway assembly, including a slideway having a sliding surface and an outer surface of the slideway, a plurality of static pressure bushes and a plurality of dynamic pressure bushes, and a sliding member , set on the sliding surface and reciprocate along the slideway, wherein the slideway has a plurality of static pressure passages and dynamic pressure passages for passing fluid, the static pressure passages and dynamic pressure passages are respectively arranged in the inner wall of the slideway and pass through The sliding surface and the outer surface of the slideway, the static pressure passage includes a first concave cavity arranged on the sliding surface and a static pressure channel connecting the first concave cavity and the outer surface of the slideway, and the dynamic pressure passage includes an inward concave cavity arranged on the sliding surface The concave second cavity and the dynamic pressure channel connecting the second cavity and the outer surface of the slideway, the static pressure bushing has a static pressure cavity, the static pressure bush is arranged at the opening of the first cavity and the static pressure cavity opens Facing the sliding surface, the bottom of the static pressure cavity communicates with the first cavity, the dynamic pressure bushing has a dynamic pressure cavity, the dynamic pressure bushing is arranged at the opening of the second cavity and the opening of the dynamic pressure cavity faces On the sliding surface, the bottom of the dynamic pressure cavity communicates with the second cavity, and the cross section of the dynamic pressure cavity gradually expands from the bottom to the opening.

In the slide rail device provided by the present invention, it may also have such a feature: wherein, the slideway is any one of a straight slideway, an arc-type slideway and a wave-type slideway, and the slideway is a closed slideway or For open slides, the cross section of closed slides is any one of circular, oval or square, and the cross section of open slides is any one of semicircle, V-shaped or U-shaped.

In addition, in the slide rail device provided by the present invention, it may also have such a feature: wherein, the slideway further includes a plurality of discharge units uniformly arranged at the bottom of the slideway, and the discharge units include discharge holes and throttling holes. In the valve, the discharge hole is arranged in the inner wall of the slideway and communicates with the sliding surface and the outer surface of the slideway, and the throttle valve is arranged in the discharge hole for controlling the fluid flow speed in the discharge hole.

In addition, in the slide rail device provided by the present invention, it may also have such a feature: wherein, the slideway is a linear open slideway, the cross section of the slideway is in a semicircular shape, and the length of the slide member is less than the length of the slideway , the top surface of the static pressure bushing is an arc-shaped surface that coincides with the inner cylindrical surface of the slideway and coincides with the inner cylindrical surface of the slideway, and the top surface of the dynamic pressure bushing is an arc that coincides with the inner cylindrical surface of the slideway Shaped surface and coincides with the inner cylindrical surface of the slideway.

In addition, the slide rail device provided by the present invention may also have such a feature: wherein, the top end surface of the static pressure bushing is higher than the inner cylindrical surface of the slideway, and the top end surface of the dynamic pressure bushing is higher than the inner cylindrical surface of the slideway. cylindrical surface.

In addition, in the slide rail device provided by the present invention, it may also have such a feature: wherein, the static pressure cavity is cylindrical, and the shape of the cavity opening is any one of circular, elliptical, square, rectangular and trapezoidal , the shape of the mouth of the dynamic pressure cavity is any one of circle, ellipse, square, rectangle and trapezoid.

In addition, the slide rail device provided by the present invention may also have such a feature: wherein, the first concave cavities and the second concave cavities are uniformly and alternately arranged on the sliding surface.

In addition, in the slide rail device provided by the present invention, it may also have such a feature: wherein, the slide member has an outer cylindrical surface matching the surface of the slideway, and the dynamic pressure cavity is crescent-shaped or along the cross section of the slideway. The two ends of the cross section of the slideway are wedge-shaped, the gap ratio is 2-2.5, and the expression of the gap ratio is h2/h1, h2 is the distance between the bottom of the dynamic pressure cavity and the outer cylindrical surface, and h1 is the distance between the dynamic pressure bushing The distance between the top face and the outer cylindrical face.

In addition, the slide rail device provided by the present invention may also have such a feature: wherein, the static pressure bushing and the slideway are fixedly connected or detachably connected, and the dynamic pressure bushing and the slideway are fixedly connected or detachably connected .

In addition, in the slide rail device provided by the present invention, it may also have such a feature: wherein, the depth of the concave of the static pressure cavity is 0.5-5mm, and the total surface area of the static pressure cavity accounts for 20% of the total surface area of the concave cylindrical surface. -60%, the concave depth of the dynamic pressure cavity is 4-8mm, and the total surface area of the dynamic pressure cavity accounts for 20-60% of the total surface area of the concave cylindrical surface.

The present invention also provides a slide rail device, which has the characteristics of including a slideway with a sliding surface of the slideway, and a sliding assembly arranged on the sliding surface of the slideway and reciprocatingly moving along the slideway, wherein the sliding assembly includes a Sliding surfaces and slides on the outer side of the slide, multiple hydrostatic bushings and multiple hydrodynamic bushings, the sliding surfaces match the sliding surface of the slideway, the slide has multiple hydrostatic channels for passing fluid and dynamic pressure The channel, the static pressure channel and the dynamic pressure channel are respectively arranged in the inner wall of the slider and pass through the sliding surface and the outer surface of the slider. and the static pressure channel on the outer surface of the slider. The dynamic pressure channel includes a fourth concave cavity set on the sliding surface and a dynamic pressure channel connecting the fourth concave cavity and the outer surface of the slider. The static pressure bushing has a static pressure A cavity, the static pressure bushing is arranged at the opening of the third cavity and the opening of the static pressure cavity faces the sliding surface, the bottom of the static pressure cavity communicates with the third cavity, the dynamic pressure bush has a dynamic pressure cavity, The dynamic pressure bushing is arranged at the opening of the fourth cavity and the opening of the dynamic pressure cavity faces the sliding surface, the bottom of the dynamic pressure cavity communicates with the fourth cavity, and the cross section of the dynamic pressure cavity is from the bottom to the opening It gradually expands, wherein the slideway is a linear open slideway, the length of the sliding part is less than the length of the slideway, the top surface of the static pressure bushing protrudes from the sliding surface, and the top surface of the dynamic pressure bushing protrudes On the sliding surface, the static pressure cavity is cylindrical, the shape of the cavity opening is any one of circle, ellipse, square, rectangle and trapezoid, and the shape of the dynamic pressure cavity cavity is round, ellipse, square Any one of , rectangle and trapezoid, the depth of the concave of the static pressure cavity is 0.5-5mm, the depth of the concave of the dynamic pressure cavity is 4-8mm, the static pressure bushing and the sliding part are fixedly connected or can be used The connection is disassembled, and the dynamic pressure bushing and the sliding part are fixedly connected or detachably connected.

Function and Effect of Invention

According to the slide rail device involved in the present invention, in the working state, the slider does not contact with the slideway surface when it slides, and is always in a state of gas or liquid friction. The error is not directly related. Compared with the static pressure gas or liquid slide rail, the use of gas or liquid dynamic and static pressure technology can improve the dynamic running accuracy of the sliding parts on the slide rail device, reaching a straightness of 0.05-1.0μm per meter.

The external oil tank is divided into two ways to supply oil, and the oil pressure and flow are controlled by the throttle respectively, and then enters the static pressure oil chamber and the dynamic pressure oil chamber. Equipment should use hydrostatic and dynamic pressure slide rails at the same time, use static pressure slide rails for low-speed and heavy-load equipment, and use dynamic pressure slide rails for high-speed light-load equipment. A machine can be used for multiple purposes, thereby saving production costs.

In addition, since the dynamic pressure bushing and the static pressure bushing are arranged on the slideway surface later, the processing of the dynamic pressure cavity and the static pressure cavity can be processed separately, so the processing difficulty is greatly reduced, thereby improving the dynamic pressure cavity. And the working efficiency of static pressure concave cavity processing reduces the processing cost.

Description of drawings

Fig. 1 is a cross-sectional schematic view of a cross section of a slide rail device in an embodiment of the present invention;

Fig. 2 is a schematic cross-sectional view of a slide rail in an embodiment of the present invention;

Figure 3 is an enlarged schematic view of part A in Figure 1; and

FIG. 4 is an enlarged schematic view of part B in FIG. 1 .

Detailed ways

In order to make the technical means, creative features, goals and effects of the present invention easy to understand, the following embodiments will specifically illustrate the slide rail device of the present invention in conjunction with the accompanying drawings.

Example 1

As shown in FIG. 1 , the sliding rail device 100 includes a sliding track assembly 10 and a sliding member 20 .

The slideway assembly 10 includes a slideway 11 , a plurality of static pressure bushes 12 and a plurality of dynamic pressure bushes 13 .

In this embodiment, the slideway 11 is a linear open slideway, and the slideway 11 has a concave cavity with a semicircular cross section.

As shown in FIG. 2 , the slideway 11 has a sliding surface 111 , a slideway outer surface 112 , a plurality of static pressure passages 113 and a plurality of dynamic pressure passages 114 .

The static pressure channel 113 is arranged in the inner wall of the slideway 11 and runs through the sliding surface 111 and the outer surface 112 of the slideway. The static pressure channel 113 includes a first concave cavity 113a which is set on the sliding surface 111 and is inwardly concave and communicates with the first concave cavity 113a. And the static pressure channel 113b on the outer surface 112 of the slideway, the static pressure channel 113 is used for passing fluid, and the external high-pressure fluid enters the sliding surface 111 through the static pressure channel 113b on the outer surface. In this embodiment, the fluid is liquid oil.

The dynamic pressure channel 114 is arranged in the inner wall of the slideway 11 and runs through the sliding surface 111 and the outer surface 112 of the slideway. The dynamic pressure channel 114 includes a second concave cavity 114a which is set on the sliding surface 111 and is inwardly concave and communicates with the second concave cavity 114a. And the dynamic pressure hole 114b on the outer surface 112 of the slideway, the dynamic pressure channel 114 is used for passing fluid, and the external fluid enters the sliding surface 111 through the dynamic pressure hole 114b on the outer surface. In this embodiment, the fluid is liquid oil.

As shown in FIG. 4, the static pressure bushing 12 has a cylindrical static pressure cavity 121, the static pressure bushing 12 is disposed at the opening of the first cavity 113a and the opening of the static pressure cavity 121 faces the sliding surface 111, The bottom of the static pressure cavity 121 communicates with the first cavity 113a. In the embodiment, the first cavity 113a is cylindrical, and the static pressure bushing 12 is made of metal.

As shown in Figure 3, the dynamic pressure bushing 13 has a dynamic pressure cavity 131, the dynamic pressure bushing 13 is arranged at the opening of the second cavity 114a and the opening of the dynamic pressure cavity 131 faces the sliding surface 111, the dynamic pressure cavity The bottom of 131 communicates with the second cavity 114a, and the cross section of the dynamic pressure cavity 131 gradually expands from the bottom to the opening. In the embodiment, the second cavity 114a is cylindrical, and the dynamic pressure bushing 13 is made of metal to make.

As shown in Figure 1, a plurality of static pressure bushings 12 and a plurality of dynamic pressure bushings 13 are arranged on the sliding surface 111 along the cross section of the slideway 11, and in an embodiment, three static pressure bushings are arranged on a cross section 12 and three dynamic pressure bushings 13, a plurality of cross sections with static pressure bushings 12 and dynamic pressure bushings 13 are arranged on a slideway 11.

As shown in Figures 3 and 4, the top surface of the static pressure bushing 12 is an arc-shaped surface that coincides with the inner cylindrical surface of the slideway 11 and coincides with the inner cylindrical surface of the slideway 11, and the top surface of the dynamic pressure bushing 13 The surface is an arc-shaped surface matching with the inner cylindrical surface of the slideway 11 and coincides with the inner cylindrical surface of the slideway 11 .

As shown in Figure 1, the slider 20 is in the shape of a straight line and has a convex semi-cylindrical surface 21. The convex semi-cylindrical surface 21 of the slider 20 is matched with the sliding surface 111. There is a certain gap, and the sliding member 20 does not contact the sliding surface 111 when sliding. When the external liquid oil enters the sliding surface 111 through the static pressure channel 113b and the dynamic pressure channel 114b on the outer surface, the sliding member 20 floats, and the sliding member 20 is in non-contact state with slideway 11 when sliding.

The slider 20 is arranged on the sliding surface 111 and moves back and forth along the slideway 11 , the length of the slider 20 is shorter than the length of the slideway 11 .

Example 2

The other structure of this embodiment is the same as that of Embodiment 1, the difference is that the slideway assembly 10 also includes a plurality of discharge units 14, which are evenly arranged at the bottom of the slideway 11, and the discharge unit 14 includes a discharge passage 115 and a throttle valve 141, as shown in Figure 1, the discharge passage 115 is arranged in the inner wall of the bottom of the slideway 11 and communicates with the sliding surface 111 and the outer surface 112 of the slideway, and the throttle valve 141 is arranged in the discharge passage 115 for controlling the discharge passage The speed at which the hydraulic oil flows in 115.

Example 3

Other structures of this embodiment are the same as those of Embodiment 2, except that the top surface of the static pressure bushing 12 is higher than the sliding surface 111 of the slideway 11, and the top surface of the dynamic pressure bushing 13 is higher than the sliding surface 111 of the slideway 11.

In this embodiment, the distances between the top surfaces of the static pressure bushing 12 and the dynamic pressure bushing 13 and the sliding surface 111 are both 0.5 mm.

Example 4

The other structure of this embodiment is the same as that of Embodiment 2, the difference is that the shape of the mouth of the static pressure cavity 121 is any one of circular, elliptical, square, rectangular and trapezoidal, and the shape of the mouth of the dynamic pressure cavity 131 is Any one of circle, ellipse, square, rectangle and trapezoid.

Along the moving direction of the slideway 11 , the dynamic pressure cavity 131 in the axial section of the dynamic pressure bush 13 is crescent-shaped or the two ends of the dynamic pressure cavity 131 in the section are wedge-shaped.

In Embodiment 4, the shape of the opening of the static pressure cavity 121 is oval, and the shape of the cavity opening of the dynamic pressure cavity 131 is trapezoidal. Along the moving direction of the slideway 11, the dynamic pressure cavity 131 in the axial section of the dynamic pressure bush 13 It is crescent-shaped.

Example 5

Other structures of this embodiment are the same as those of Embodiment 4, except that the first concave cavities 113 and the second concave cavities 114 are uniformly and alternately arranged on the sliding surface 111 .

Example 6

Other structures of this embodiment are the same as those of Embodiment 4, except that the inward concave depth of the static pressure cavity 121 is 0.5-5mm, and the total surface area of the static pressure cavity 121 accounts for 20-60% of the total surface area of the sliding surface 111. The inward concave depth of the dynamic pressure cavity 131 is 4-8mm, the total surface area of the dynamic pressure cavity 131 accounts for 20-60% of the total surface area of the sliding surface 111, the clearance ratio is 2-2.5, and the expression of the clearance ratio is h2/ h1 and h2 are the distances between the bottom of the dynamic pressure cavity 131 and the outer cylindrical surface 21 , and h1 is the distance between the top surface of the dynamic pressure bushing 13 and the outer cylindrical surface 21 . When the gap ratio is 2.2, the bearing capacity is the largest. It is determined by factors such as the speed of the sliding part, the size of the bushing, the gap between the sliding part and the bushing, the viscosity of the oil, and the external load.

In Example 9, the inward concave depths of the static pressure cavity 121 and the dynamic pressure cavity 131 are both 4.5mm, and the total surface area of the static pressure cavity 121 accounts for 22% of the total surface area of the concave hemispherical surface 11, and the dynamic pressure cavity 131 The total surface area accounts for 22% of the total surface area of the concave hemispherical surface 11, and the gap ratio is 2.1.

Example 7

The other structure of this embodiment is the same as that of Embodiment 4, the difference is that the static pressure bushing 12 is fixedly connected to the first cavity 113a, the dynamic pressure bushing 13 is fixedly connected to the second cavity 114a, and the static pressure bushing 12 The connection method with the first cavity 113a adopts bonding or interference fit, and the connection method between the dynamic pressure bush 13 and the second cavity 114a adopts bonding or interference fit. In Embodiment 7, the static pressure bush 12 and the first The connection method of the cavity 113a is bonding, and the connection method of the dynamic pressure bush 13 and the second cavity 114a is bonding.

Example 8

Other structures of this embodiment are the same as those of Embodiment 4, except that the static pressure bush 12 is detachably connected to the first cavity 113a, and the dynamic pressure bush 13 is detachably connected to the second cavity 114a.

In Embodiment 7, the static pressure bushing 12 is connected to the first cavity 113a by screws, and the dynamic pressure bushing 13 and 114a are connected by screws.

Example 9

The other structures of this embodiment are the same as those of Embodiment 4, except that the cross section of the open slideway is any one of circular arc, V-shape or U-shape.

The cross section of the open slideway in this embodiment is U-shaped.

Example 10

The other structures of this embodiment are the same as those of Embodiment 4, except that the open slideway can also be an arc-shaped slideway or a wave-shaped slideway.

In this embodiment, the open slideway is an arc type slideway.

Example 11

Other structures of this embodiment are the same as those of Embodiment 4, except that the slideway 11 can be a closed slideway.

The cross section of the enclosed slideway is any one of circular, oval or square,

The cross section of the enclosed slideway in this embodiment is circular.

Example 12

In this embodiment, the slide rail device includes a slideway and a slide assembly.

The slide assembly includes a slide having a slide surface and a slide outer side, a plurality of hydrostatic bushings, and a plurality of hydrodynamic bushings.

The slideway has a slideway sliding surface, the sliding surface matches the slideway sliding surface,

The sliding assembly is arranged on the sliding surface of the slideway and moves back and forth along the slideway.

In this embodiment, the slideway is a linear open slideway, and the slideway has a concave cavity with a V-shaped cross section.

The slider has a plurality of static pressure channels and dynamic pressure channels for passing fluid, and the static pressure channels and dynamic pressure channels are respectively arranged in the inner wall of the slider and pass through the sliding surface and the outer surface of the slider.

The slider has a sliding surface, an outer side of the slider, a plurality of static pressure channels, and a plurality of dynamic pressure channels.

The slider has a plurality of static pressure channels and dynamic pressure channels for passing fluid, and the static pressure channels and dynamic pressure channels are respectively arranged in the inner wall of the slider and pass through the sliding surface and the outer surface of the slider.

The static pressure channel includes a third concave cavity concaved inwardly on the sliding surface and a static pressure hole connecting the third concave cavity and the outer surface of the sliding part.

The static pressure channel is arranged in the inner wall of the slider and runs through the sliding surface and the outer surface of the slider. The static pressure channel includes a third concave cavity that is concave upward and a static pressure channel that communicates with the third concave cavity and the outer surface of the slider. , the static pressure channel is used to pass the fluid, and the external high-pressure fluid enters the sliding surface of the slideway through the static pressure channel on the outer surface. In this embodiment, the fluid is liquid oil.

The dynamic pressure channel is arranged in the inner wall of the slider and runs through the sliding surface and the outer surface of the slider. The dynamic pressure channel includes a fourth concave cavity that is set upward and inwardly concave and a dynamic pressure channel that communicates with the fourth concave cavity and the outer surface of the slider. , the dynamic pressure channel is used to pass the fluid, and the external fluid enters the sliding surface of the slideway through the dynamic pressure channel on the outer surface. In this embodiment, the fluid is liquid oil.

The static pressure bushing has a cylindrical static pressure cavity, the static pressure bushing is arranged at the opening of the third cavity and the opening of the static pressure cavity faces the sliding surface, and the bottom of the static pressure cavity is connected with the third cavity Generally, in the embodiment, the third cavity is cylindrical, and the static pressure bushing is made of metal.

The dynamic pressure bushing has a dynamic pressure cavity, the dynamic pressure bushing is arranged at the opening of the fourth cavity and the opening of the dynamic pressure cavity faces the sliding surface, the bottom of the dynamic pressure cavity communicates with the fourth cavity, and the dynamic pressure The cross section of the cavity gradually expands from the bottom to the opening. In the embodiment, the fourth cavity is cylindrical, and the dynamic pressure bushing is made of metal.

A plurality of static pressure bushes and a plurality of dynamic pressure bushes are arranged on the sliding surface along the cross section of the slider. In this embodiment, three static pressure bushes and three dynamic pressure bushes are arranged on one cross section. A plurality of cross-sections with static pressure bushes and dynamic pressure bushes are arranged on one slide.

The top surface of the static pressure bush protrudes from the sliding surface, and the top surface of the dynamic pressure bush protrudes from the sliding surface.

The static pressure cavity is cylindrical, the shape of the cavity opening is any one of circle, ellipse, square, rectangle and trapezoid, and the shape of the dynamic pressure cavity cavity is circle, ellipse, square, rectangle and trapezoid any of the

In the embodiment, the shape of the mouth of the static pressure cavity is oval, and the shape of the mouth of the dynamic pressure cavity is trapezoidal. Along the moving direction of the slideway, the dynamic pressure cavity in the axial section of the dynamic pressure bush is crescent-shaped.

The indentation depth of the static pressure cavity is 0.5-5mm, and the indentation depth of the dynamic pressure cavity is 4-8mm. In the embodiment, the indentation depth of the static pressure cavity is 4mm, and the indentation depth of the dynamic pressure cavity The depth of the recess is 4mm.

The static pressure bushing is fixedly connected with the sliding part, and the dynamic pressure bushing is fixedly connected with the sliding part.

The sliding part is arranged on the sliding surface of the slideway and moves back and forth along the slideway, and the length of the sliding part is shorter than that of the slideway. The sliding part is in the shape of a straight line with a V-shaped cross section, which matches the sliding surface of the slideway. There is a certain gap between the sliding surface of the sliding part and the sliding surface of the slideway. No contact, when the external liquid oil enters the sliding surface of the slideway through the static pressure channel and the dynamic pressure channel, the sliding part floats, and the sliding part is in a non-contact state with the slideway when sliding.

Function and effect of embodiment

According to the slide rail device involved in this embodiment, in the working state, the slider does not contact with the slideway surface when it slides, and is always in a state of gas or liquid friction. The manufacturing error is not directly related. Compared with the static pressure gas or liquid slide rail, the use of gas or liquid dynamic and static pressure technology can improve the dynamic running accuracy of the sliding parts on the slide rail device, reaching 0.1-1.0μm.

In addition, since the dynamic pressure bushing and the static pressure bushing are arranged on the slideway surface later, the processing of the dynamic pressure cavity and the static pressure cavity can be processed separately, so the processing difficulty is greatly reduced, thereby improving the dynamic pressure cavity. And the working efficiency of static pressure concave cavity processing reduces the processing cost.

Furthermore, the top ends of the static pressure bushing and the dynamic pressure bushing are higher than the sliding surface, and the processing accuracy of the sliding surface is not high, which has the effect of improving work efficiency and reducing the processing cost of the sliding surface.

Furthermore, the static pressure bushing, the dynamic pressure bushing and the slideway are all bonded and fixedly connected, which has the characteristics of convenient processing.

The above embodiments are preferred examples of the present invention, and are not intended to limit the protection scope of the present invention.

Claims (10)

1. A slide rail device, characterized in that, comprising: a slideway assembly including a slideway having a sliding surface and a slideway outer surface, a plurality of hydrostatic bushings and a plurality of hydrodynamic bushings, and a slider, arranged on the sliding surface, reciprocatingly moves along the slideway, Wherein, the slideway has a plurality of static pressure passages and dynamic pressure passages for passing fluid, and the static pressure passages and the dynamic pressure passages are respectively arranged in the inner wall of the slideway and pass through the sliding surface and the outer surface of the slideway, The static pressure passage includes a first concave cavity set on the sliding surface and a static pressure hole communicating with the first concave cavity and the outer surface of the slideway, The dynamic pressure passage includes a second concave cavity provided on the sliding surface and a second concave cavity that is concave inward, and a dynamic pressure hole that communicates with the second concave cavity and the outer surface of the slideway, The static pressure bushing has a static pressure concave cavity, the static pressure bushing is arranged at the opening of the first concave cavity and the opening of the static pressure concave cavity faces the sliding surface, and the static pressure concave cavity The bottom communicates with the first cavity, The dynamic pressure bushing has a dynamic pressure concave cavity, the dynamic pressure bushing is arranged at the opening of the second concave cavity and the opening of the dynamic pressure concave cavity faces the sliding surface, and the dynamic pressure concave cavity The bottom of the cavity communicates with the second cavity, and the cross section of the dynamic pressure cavity gradually expands from the bottom to the opening. 2. The slide rail device according to claim 1, characterized in that: Wherein, the slideway is any one of a linear slideway, an arc-shaped slideway and a wave-shaped slideway, The slideway is a closed slideway or an open slideway, The cross section of the enclosed slideway is any one of circular, elliptical or square, The cross-section of the open slideway is any one of semicircle, V-shape or U-shape. 3. The slide rail device according to claim 2, characterized in that: Wherein, the slideway also includes a plurality of discharge units uniformly arranged at the bottom of the slideway, The discharge unit includes a discharge channel and a throttle valve, The discharge channel is arranged in the inner wall of the slideway and communicates with the sliding surface and the outer surface of the slideway, The throttle valve is disposed in the discharge passage for controlling the velocity of the fluid flowing in the discharge hole. 4. The slide rail device according to claim 2, characterized in that: Wherein, the slideway is a linear open slideway, and the cross section of the slideway is in a semicircular shape, the length of the slider is less than the length of the slideway, The top end surface of the static pressure bushing is an arc-shaped surface that coincides with the concave cylindrical surface of the slideway and coincides with the concave cylindrical surface of the slideway, The top end surface of the dynamic pressure bushing is an arc-shaped surface coincident with the concave cylindrical surface of the slideway and coincides with the concave cylindrical surface of the slideway. 5. The slide rail device according to claim 4, characterized in that: Wherein, the top end surface of the static pressure bushing is higher than the concave cylindrical surface of the slideway, The top end surface of the dynamic pressure bush is higher than the concave cylindrical surface of the slideway. 6. The slide rail device according to claim 4, characterized in that: Wherein, the static pressure concave cavity is cylindrical, and the shape of the cavity opening is any one of circular, oval, square, rectangular and trapezoidal, The shape of the mouth of the dynamic pressure cavity is any one of circle, ellipse, square, rectangle and trapezoid. 7. The slide rail device according to claim 1, characterized in that: Wherein, the depth of the indentation of the static pressure cavity is 0.5-5mm, The total surface area of the static pressure cavity accounts for 20-60% of the total surface area of the concave cylindrical surface, The concave depth of the dynamic pressure cavity is 4-8mm, and the total surface area of the dynamic pressure cavity accounts for 20-60% of the total surface area of the concave cylindrical surface. 8. The slide rail device according to claim 4, characterized in that: Wherein, the sliding member has an outer cylindrical surface matching the surface of the slideway, The dynamic pressure cavity is crescent-shaped along the cross-section of the slideway or wedge-shaped along both ends of the cross-section of the slideway, The gap ratio is 2-2.5, and the expression of the gap ratio is h2/h1, h2 is the distance between the bottom of the dynamic pressure cavity and the outer cylindrical surface, and h1 is the distance between the top end surface of the dynamic pressure bushing and the outer cylindrical surface. 9. The slide rail device according to claim 1, characterized in that: Wherein, the static pressure bushing is fixedly connected or detachably connected to the slideway, The dynamic pressure bush is fixedly connected or detachably connected to the slideway. 10. A slide rail device, characterized in that it comprises: a slideway having a slideway sliding surface, and the sliding assembly is arranged on the sliding surface of the slideway and reciprocates along the slideway, Wherein, the sliding assembly includes a sliding member having a sliding surface and an outer surface of the sliding member, a plurality of static pressure bushings and a plurality of dynamic pressure bushings, the sliding surface matches the sliding surface of the slideway, The slider has a plurality of static pressure passages and dynamic pressure passages for passing fluid, and the static pressure passages and the dynamic pressure passages are respectively provided in the inner wall of the slider and pass through the sliding surface and the the outer side of the slide, The static pressure channel includes a third concave cavity provided on the sliding surface and concave inwardly, and a static pressure channel connecting the third concave cavity and the outer surface of the slider, The dynamic pressure channel includes a fourth concave cavity provided on the sliding surface and concave inwardly, and a dynamic pressure hole connecting the fourth concave cavity and the outer surface of the slider, The static pressure bushing has a static pressure concave cavity, the static pressure bushing is arranged at the opening of the third concave cavity and the opening of the static pressure concave cavity faces the sliding surface, and the static pressure concave cavity The bottom communicates with the third cavity, The dynamic pressure bushing has a dynamic pressure concave cavity, the dynamic pressure bushing is arranged at the opening of the fourth concave cavity and the opening of the dynamic pressure concave cavity faces the sliding surface, and the dynamic pressure concave cavity The bottom of the cavity communicates with the fourth cavity, and the cross section of the dynamic pressure cavity gradually expands from the bottom to the opening, Wherein, the slideway is a linear open slideway, and the length of the slide member is less than the length of the slideway, the top end surface of the hydrostatic bush protrudes from the sliding surface, the top end surface of the dynamic pressure bush protrudes from the sliding surface, The static pressure concave cavity is cylindrical, and the shape of the cavity opening is any one of circular, oval, square, rectangular and trapezoidal, The shape of the mouth of the dynamic pressure cavity is any one of circle, ellipse, square, rectangle and trapezoid.