Hydrostatic guideway device

Abstract

The utility model relates to the technical field of machine tools, in particular to a hydrostatic guideway device. The guide rail is provided with a limiting sliding groove, the static pressure sliding block is provided with a limiting protruding block, the base is arranged on the lower portion of the guide rail and supports the guide rail, the workbench is fixedly installed at the upper end of the static pressure sliding block, oil tanks are arranged on the two side walls of the workbench, and a plurality of oil cavities are formed in the side wall, making contact with the limiting sliding groove, of the limiting protruding block. An oil inlet channel is formed in the static pressure sliding block, oil collecting grooves are formed in the two sides of the static pressure sliding block, the oil tank is connected with the oil inlet channel through an oil inlet pipe, and the oil tank is connected with the oil collecting grooves through oil return pipes. According to the hydrostatic guide rail, the oil flow can be effectively adjusted, the stability of an oil film is guaranteed, oil backflow is uniform, and an oil scraping plate is avoided.

Description

TECHNICAL FIELD

[0001] The utility model relates to processing machine tool technical field especially is related to a static pressure guide rail device. BACKGROUND

[0002] The static pressure guide rail device as a kind of mechanical device that can meet the stable and low friction motion control demand, plays an important role in key field.The working principle of static pressure guide rail device is based on forming an oil film with specific pressure between guide rail and slider, realizes the non-contact motion between moving parts and guide rail by this oil film, thereby reducing friction and wear, provides guarantee for the high-precision motion and long-term stable operation of equipment, and static pressure guide rail is divided into open type and closed type according to structure.

[0003] The pressure oil of open static pressure guide rail enters each oil cavity of guide rail through throttler, guide rail face is effectively separated by oil film, and oil in oil cavity flows back to oil tank through oil sealing edge, forming a dynamic cycle.Open static pressure guide rail cannot provide high enough carrying capacity when facing larger external load.Closed guide rail is designed with oil cavity on upper and lower guide rail face, and this design makes it can bear bidirectional external load, thereby improving the stability of moving parts work.

[0004] But traditional static pressure guide rail, whether open type or closed type, needs to design oil scraping plate, which not only increases the complexity of structure, but also may appear problems such as wear of oil scraping plate, poor oil scraping effect and the like in use process, influence the performance and service life of guide rail.In addition, in order to ensure the normal operation of static pressure guide rail, it is necessary to ensure that oil film is uniform and liquid can flow back smoothly, and continuous oiling is also needed to be realized, to meet the demand of long-term stable operation of equipment.However, the existing static pressure guide rail often has certain deficiencies in these aspects, and it is difficult to completely meet the working requirements of high precision and high reliability.

[0005] In summary, as a key technology in mechanical manufacturing field, static pressure guide rail device needs to solve the problems existing in existing static pressure guide rail device, to meet the actual production needs. UTILITY MODEL CONTENT

[0006] In order to solve the problem of static pressure guide rail without oil scraping plate and convenient oil liquid backflow, the utility model provides a static pressure guide rail device.

[0007] The utility model provides a kind of static pressure guide rail device, including the guide rail of limit sliding slot, the static pressure slider of limit protruding block, the base of being arranged in the lower part of guide rail and supporting guide rail, the workbench of being fixedly installed on the upper end of static pressure slider, the oil tank is equipped in the both sides wall of workbench, multiple oil cavities are equipped on the side wall of limit protruding block and limit sliding slot contact, oil inlet passage is opened in static pressure slider, oil collecting groove is equipped in the both sides of static pressure slider, oil tank is connected with oil inlet passage by oil inlet pipe, oil tank is connected with oil collecting groove by oil return pipe.

[0008] Further, the oil cavity is provided with an oil discharge groove around, and the oil cavity and the guide rail have an oil film gap.

[0009] Further, the oil inlet passage includes a horizontal main passage and a plurality of longitudinal branch passages communicated with the main passage, the main passage is connected with the oil inlet pipe, the branch passage is communicated with the corresponding oil cavity, and the main passage is provided with a throttle and a sealing ring at the contact position with the oil inlet pipe.

[0010] Further, a valve mounting hole is formed on the oil tank, an oil inlet valve is inserted into the valve mounting hole, and the oil inlet valve is connected with the oil inlet pipe.

[0011] Further, the guide rail includes an upper plate, a side plate connected with the upper plate and symmetrically arranged on both sides of the upper plate and recessed towards the center, the side plate includes an upper side plate, a vertical side plate and a lower side plate, the upper side plate, the vertical side plate and the lower side plate constitute the limit sliding slot, the oil cavity includes an upper oil cavity, an upper side oil cavity, a vertical oil cavity and a lower side oil cavity arranged on the static pressure slider corresponding to the upper plate and the side plate, and the oil discharge grooves of the upper oil cavity, the upper side oil cavity, the vertical oil cavity and the lower side oil cavity are communicated.

[0012] Further, the static pressure slider is provided with a trapezoidal groove, and the upper oil cavities are distributed on both sides of the trapezoidal groove.

[0013] Further, the oil discharge grooves of the upper oil cavities are distributed in the form of being surrounded by three sides, the oil discharge grooves of the upper side oil cavity, the vertical oil cavity and the lower side oil cavity are distributed in the form of being surrounded by four sides, and the oil collecting grooves communicated with the oil discharge grooves of the lower side oil cavity are arranged on both sides of the static pressure slider.

[0014] Further, the oil tank includes an oil filter and an oil pump, the oil inlet pipe is connected with the oil filter, an overflow pipe is arranged on the oil inlet pipe between the oil pump and the oil filter, the overflow pipe is connected with the oil tank, and an overflow valve is arranged on the overflow pipe.

[0015] Further, an oil return pump is arranged between the oil tank and the oil return pipe.

[0016] Further, a plurality of mounting holes for fixing the workbench are arranged on the static pressure slider, and protective plates are movably connected on both sides of the workbench.

[0017] In summary, the utility model has the beneficial technical effects as follows:

[0018] 1. The utility model provides a kind of static pressure guide rail device, oil backflow is convenient, static pressure slider both sides are equipped with oil collecting groove, oil cavity is equipped with oil discharge groove around, and the oil discharge groove of upper oil cavity, upper oil cavity, vertical oil cavity and lower oil cavity is connected, the oil discharge groove of oil collecting groove and lower oil cavity is communicated, provide smooth passage for oil backflow, ensure that oil can be efficiently flowed back to oil tank, while overflow pipe is equipped on the oil inlet pipe between oil pump and oil filter, can overflow protection when pressure is too high, ensure the safe and stable operation of system.

[0019] 2. The utility model provides a kind of static pressure guide rail device is exempted from oil scraping board, avoid the influence of the problems such as poor oil scraping effect on guide rail performance and service life, realize the natural backflow and circulation of oil by reasonable oil cavity, oil discharge groove and oil collecting groove design, and the connection mode of oil tank and oil inlet channel, oil collecting groove, does not need to rely on oil scraping board to carry out oil treatment.

[0020] 3. The utility model discloses the both sides wall of workbench is equipped with oil tank, and the whole device structure is compact, and the space is small, and oil inlet channel includes horizontal main channel and multiple longitudinal branch channels communicated with main channel, and branch channel is communicated with corresponding oil cavity, and main channel is equipped with throttler and sealing ring at the contact place of oil inlet pipe, can effectively adjust oil flow, guarantee the stability of oil film.

[0021] 4. The utility model provides a kind of static pressure guide rail device, oil tank is set in the both sides of static pressure slider and supplies oil to static pressure slider, and 0.02-0.03mm oil film is formed between guide rail and static pressure slider, because oil cavity is not opened in guide rail, so guide rail can be intercepted according to operating length requirement. BRIEF DESCRIPTION OF DRAWINGS

[0022] Figure 1 It is the structure schematic view of a kind of static pressure guide rail device of the utility model embodiment.

[0023] Figure 2 It is the sectional view of static pressure slider of the utility model embodiment.

[0024] Figure 3 It is the structure schematic view of guide rail of the utility model embodiment.

[0025] Figure 4 It is the structure schematic view of static pressure slider of the utility model embodiment.

[0026] Figure 5 It is another structure schematic view of static pressure slider of the utility model embodiment.

[0027] Figure 6 It is the structure schematic view of oil cavity and oil discharge groove of the utility model embodiment.

[0028] 1, guide rail; 101, upper plate; 102, upper side plate; 103, vertical side plate; 104, lower side plate; 2, static pressure slider; 201, trapezoidal groove; 202, mounting hole; 3, base; 4, workbench; 401, guard plate; 5, oil cavity; 501, upper oil cavity; 502, upper side oil cavity; 503, vertical oil cavity; 504, lower side oil cavity; 505, oil discharge groove; 6, oil inlet channel; 601, main channel; 602, branch channel; 7, oil inlet pipe; 8, oil return pipe; 9, oil tank; 10, oil collecting groove; 11, oil filter; 12, overflow pipe; 13, throttle; 14, oil inlet valve; 15, overflow valve. DETAILED DESCRIPTION

[0029] The utility model will be made further detailed explanation below combining the drawings.

[0030] Example 1

[0031] With reference to Figure 1 , the static pressure guide rail 1 device of the embodiment includes the guide rail 1 provided with a limiting sliding groove, the static pressure slider 2 provided with a limiting protrusion, the base 3 arranged at the lower part of the guide rail 1 and supporting the guide rail 1, the workbench 4 fixedly installed on the upper end of the static pressure slider 2, the oil tank 9 arranged on the two side walls of the workbench 4, a plurality of oil cavities 5 arranged on the side wall of the limiting protrusion in contact with the limiting sliding groove, the oil inlet channel 6 formed in the static pressure slider 2, the oil collecting groove 10 arranged on the two sides of the static pressure slider 2, the oil tank 9 connected with the oil inlet channel 6 through the oil inlet pipe 7, and the oil tank 9 connected with the oil collecting groove 10 through the oil return pipe 8.

[0032] The oil discharge groove 505 is arranged around the oil cavity 5, and the oil cavity 5 has an oil film gap with the guide rail 1.

[0033] With reference to Figure 2 , the oil inlet channel 6 includes the horizontal main channel 601 and a plurality of vertical branch channels 602 communicated with the main channel 601, the main channel 601 is connected with the oil inlet pipe 7, the branch channel 602 is communicated with the corresponding oil cavity 5, and the main channel 601 is provided with the throttle 13 and the sealing ring at the contact position with the oil inlet pipe 7.

[0034] The throttle 13 adjusts the flow of oil entering the oil cavity 5, so as to control the thickness and pressure of the oil film.

[0035] With reference to Figure 4 , the valve mounting hole 202 is formed on the oil tank 9, the oil inlet valve 14 is inserted into the valve mounting hole 202, and the oil inlet valve 14 is connected with the oil inlet pipe 7.

[0036] With reference to Figure 3 , Figure 5 and Figure 6The guide rail 1 comprises an upper plate 101, double-side symmetrical side plates connected with the upper plate 101 and recessed towards the center, the side plates comprising an upper side plate 102, a vertical side plate 103 and a lower side plate 104, the upper side plate 102, the vertical side plate 103 and the lower side plate 104 constituting a limiting sliding groove, the oil cavity 5 comprising the upper plate 101 and the side plates and corresponding upper oil cavities 501, upper side oil cavities 502, vertical oil cavities 503 and lower side oil cavities 504 arranged on the static pressure sliding block 2, the upper oil cavities 501, the upper side oil cavities 502, the vertical oil cavities 503 and the lower side oil cavities 504 being connected through oil discharge grooves 505.

[0037] The upper side plate 102, the vertical side plate 103 and the lower side plate 104 of the guide rail 1 constitute a limiting sliding groove, cooperating with the limiting protrusions of the static pressure sliding block 2 to play a role of bearing and guiding. The upper oil cavities 501, the upper side oil cavities 502, the vertical oil cavities 503 and the lower side oil cavities 504 arranged on the static pressure sliding block 2 enable the guide rail 1 to bear loads from different directions, improving the bearing capacity and the stability of the moving parts.

[0038] The static pressure sliding block 2 is provided with trapezoidal grooves 201, and the upper oil cavities 501 are arranged on both sides of the trapezoidal grooves 201.

[0039] Referring to Figure 4 and Figure 6 , the oil discharge grooves 505 of the upper oil cavities 501 are arranged in a three-sided surrounding manner, the upper side oil cavities 502, the vertical oil cavities 503 and the lower side oil cavities 504 are arranged in a four-sided surrounding manner, and the static pressure sliding block 2 is provided with oil collecting grooves 10 on both sides and connected with the oil discharge grooves 505 of the lower side oil cavities 504.

[0040] Referring to Figure 4 , the oil tank 9 comprises an oil filter 11 and an oil pump, the oil inlet pipe 7 is connected with the oil filter 11, the oil inlet pipe 7 between the oil pump and the oil filter 11 is provided with an overflow pipe 12, the overflow pipe 12 is connected with the oil tank 9, and the overflow pipe 12 is provided with an overflow valve 15.

[0041] The arrangement of the overflow pipe 12 and the overflow valve 15 ensures the stability of the oil inlet pressure, avoids excessive oil pressure, and prevents waste caused by excessive oil amount.

[0042] The oil tank 9 is provided with an oil return pump between the oil tank 9 and the oil return pipe 8.

[0043] Referring to Figure 4 , the static pressure sliding block 2 is provided with a plurality of mounting holes 202 for fixing the workbench 4, and the workbench 4 is movably connected with the protective plates 401 on both sides.

[0044] Referring to Figure 1The static pressure sliding block 2 is provided with a plurality of mounting holes 202 for fixing the workbench 4, so that the workbench 4 is fixedly mounted on the static pressure sliding block 2.

[0045] During work, the oil in the oil tank 9 is filtered by the oil filter 11 and then enters the oil inlet channel 6 of the static pressure sliding block 2 through the oil inlet valve 14 and the oil inlet pipe 7 under the action of the oil pump.

[0046] When the static pressure sliding block 2 slides on the guide rail 1, the oil is consumed, and the oil in the oil cavity 5 is extruded, and part of the oil flows out from the oil discharge groove 505 around the oil cavity 5.

[0047] The overflow pipe 12 is arranged on the oil inlet pipe 7 between the oil pump and the oil filter 11, and when the oil inlet pressure is too high, the overflow valve 15 is opened, and the excess oil flows back to the oil tank 9 through the overflow pipe 12, so as to ensure the safe and stable operation of the system.

[0048] The above are preferred embodiments of the present application, and are not intended to limit the protection scope of the present application, therefore: any equivalent changes made according to the structure, shape and principle of the present application shall be covered within the protection scope of the present application.

Claims

1. A hydrostatic guide rail device, characterized in that: The invention comprises a guide rail (1) provided with a limit slide groove, a static pressure slider (2) provided with a limit protrusion, a base (3) provided at the lower part of the guide rail (1) to support the guide rail (1), and a workbench (4) fixedly installed on the upper end of the static pressure slider (2). The two side walls of the workbench (4) are provided with an oil tank (9), and the side walls where the limit protrusion contacts the limit slide groove are provided with a plurality of oil chambers (5). The static pressure slider (2) is provided with an oil inlet channel (6), and the two sides of the static pressure slider (2) are provided with oil collecting grooves (10). The oil tank (9) is connected to the oil inlet channel (6) through an oil inlet pipe (7), and the oil tank (9) is connected to the oil collecting groove (10) through an oil return pipe (8).

2. A hydrostatic guide rail device according to claim 1, characterized in that: An oil drain groove (505) is provided around the oil cavity (5), and an oil film gap is provided between the oil cavity (5) and the guide rail (1).

3. The hydrostatic guide rail device according to claim 1, characterized in that: The oil inlet channel (6) comprises a transverse main channel (601) and a plurality of longitudinal branch channels (602) communicating with the main channel (601); the main channel (601) is connected to the oil inlet pipe (7); the branch channels (602) are communicated with the corresponding oil chambers (5); and a throttle (13) and a sealing ring are provided at the contact point between the main channel (601) and the oil inlet pipe (7).

4. The hydrostatic guide rail device according to claim 1, characterized in that: The oil tank (9) is provided with a valve mounting hole (202), an oil inlet valve (14) is plugged into the valve mounting hole (202), and the oil inlet valve (14) is connected to the oil inlet pipe (7).

5. The hydrostatic guide rail device according to claim 1, characterized in that: The guide rail (1) includes an upper plate (101) and a side plate connected to the upper plate (101) and symmetrically on both sides and concave toward the center. The side plate includes an upper side plate (102), a vertical side plate (103) and a lower side plate (104). The upper side plate (102), the vertical side plate (103) and the lower side plate (104) constitute a limiting sliding groove. The oil chamber (5) includes an upper oil chamber (501), an upper oil chamber (502), a vertical oil chamber (503) and a lower oil chamber (504) which are correspondingly arranged on the static pressure slider (2) on the upper plate (101) and the side plate. The oil drain grooves (505) of the upper oil chamber (501), the upper oil chamber (502), the vertical oil chamber (503) and the lower oil chamber (504) are connected.

6. The hydrostatic guide rail device according to claim 5, characterized in that: The static pressure slider (2) is provided with a trapezoidal groove (201), and upper oil chambers (501) are distributed on both sides of the trapezoidal groove (201).

7. The hydrostatic guide rail device according to claim 6, characterized in that: The oil drain groove (505) of the upper oil chamber (501) is distributed in a form of being surrounded on three sides, and the upper oil chamber (502), the vertical oil chamber (503) and the lower oil chamber (504) are distributed in a form of being surrounded on four sides. Oil collecting grooves (10) communicating with the oil drain groove (505) of the lower oil chamber (504) are provided on both sides of the static pressure slider (2).

8. The hydrostatic guide rail device according to claim 1, characterized in that: The oil tank (9) comprises an oil filter (11) and an oil pump, the oil inlet pipe (7) is connected to the oil filter (11), an overflow pipe (12) is provided on the oil inlet pipe (7) between the oil pump and the oil filter (11), the overflow pipe (12) is connected to the oil tank (9), and an overflow valve (15) is provided on the overflow pipe (12).

9. The hydrostatic guide rail device according to claim 1, characterized in that: An oil return pump is provided between the oil tank (9) and the oil return pipe (8).

10. The hydrostatic guide rail device according to claim 1, characterized in that: The static pressure slider (2) is provided with a plurality of mounting holes (202) for fixing the workbench (4), and protective plates (401) are movably connected to both sides of the workbench (4).

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