U-shaped closed hydrostatic guideway structure with noise reduction function

Abstract

The invention discloses a U-shaped closed hydrostatic guideway structure with a noise reduction function, and relates to the technical field of hydrostatic guideways, the U-shaped closed hydrostatic guideway structure comprises a guideway base and a movable sliding table, a pair of U-shaped guideway sliding grooves are formed in the upper side of the guideway base in a bilateral symmetry manner, and a pair of U-shaped guideways are mounted on the lower side of the movable sliding table in a bilateral symmetry manner; the U-shaped guide rails are correspondingly connected into the U-shaped guide rail sliding grooves in a sliding mode, and a pressure oil film of 0.03-0.06 mm is formed between the U-shaped guide rails and the U-shaped guide rail sliding grooves. An n-shaped pull-down support is installed in the middle of the lower side of the movable sliding table, a pair of press-down guide rails are symmetrically installed on the left side and the right side of the pull-down support, and a pair of L-shaped pressing plates are symmetrically installed on the upper side of the guide rail base in a left-right mode. The downward pressing guide rail is correspondingly connected to the lower portion of the L-shaped pressing plate in a sliding mode, and a pressure oil film of 0.03-0.06 mm is formed between the downward pressing guide rail and the L-shaped pressing plate. Through reasonable design of the guide rail base, the pressing guide rail, the movable sliding table and the pull-down support, the whole closed hydrostatic guide rail structure and a guide rail system are simplified, stability and reliability are achieved, and stress is balanced.

Description

Technical Field

[0001] The present invention relates to the technical field of hydrostatic guides, and particularly relates to a U-shaped closed hydrostatic guide structure with a noise reduction function. Background Art

[0002] A hydrostatic guide can have a throttle valve introduce slide rail oil into the micro-gap on the guide surface to form an oil film, so that the guide surfaces maintain a liquid friction state. A hydrostatic guide is a type of guide with almost zero friction (friction coefficient less than five ten-thousandths), showing extremely high precision and excellent performance among all types of guides.

[0003] Chinese Utility Model Patent CN201763815U discloses a drift-free high-precision open hydrostatic guide. This guide cooperates a floating guide and a support guide, and uses a throttle valve to adjust the oil film thickness, and is applicable to precision and ultra-precision machine tool guides, such as precision roll grinders.

[0004] Most existing closed hydrostatic guides adopt a rectangular structure and are usually assembled from multiple guide components, using screws and positioning pins, resulting in difficult positioning and increased costs. In addition, the throttle valves of closed hydrostatic guides are prone to blockage due to contamination or oil scale, leading to reduced precision. At the same time, the traditional V-shaped structure has a small composite contact area, which easily causes guide wear and functional failure. Also, in a dusty environment, when the guide runs, due to the dust friction between the slide rail and the slide groove, noise is easily generated. Therefore, a simple and reliable closed hydrostatic guide structure is needed. Summary of the Invention

[0005] The purpose of the present invention is to provide a U-shaped closed hydrostatic guide structure with a noise reduction function to solve the above-mentioned defects in the prior art.

[0006] A U-shaped closed hydrostatic guide structure with a noise reduction function includes a guide base and a moving slide. On the upper side of the guide base, a pair of U-shaped guide grooves are symmetrically arranged on the left and right. On the lower side of the moving slide, a pair of U-shaped guides are symmetrically installed on the left and right. The U-shaped guides are correspondingly slidably connected in the U-shaped guide grooves and form a pressure oil film with a thickness of 0.03 - 0.06 mm between the two. In the middle of the lower side of the moving slide, a "︹"-shaped downward pull bracket is installed, and a pair of downward pressure guides are symmetrically installed on the left and right sides of the downward pull bracket. On the upper side of the guide base, a pair of L-shaped pressing plates are symmetrically installed on the left and right. The downward pressure guides are correspondingly slidably connected below the L-shaped pressing plates and form a pressure oil film with a thickness of 0.03 - 0.06 mm between the two.

[0007] Preferably, an oil storage cavity is provided inside the guide rail base. An oil return hole is provided beside the end of the U-shaped guide rail chute on the guide rail base, and the oil return hole is in communication with the oil storage cavity. A pair of T-shaped oil passing holes are symmetrically provided on the left and right inside the moving slide, and a row of oil injection holes are provided below the oil passing holes. The oil injection holes are directly above the L-shaped pressing plates on the same side. A pair of oil inlet pipes are symmetrically connected to the left and right sides of the moving slide, and the oil inlet pipes are in communication with the adjacent oil passing holes. Oil return blocks are installed at both ends of the U-shaped guide rail chute on the guide rail base. An oil return cavity is provided inside the oil return block, and the oil return cavity is in communication with the oil storage cavity through the oil return hole.

[0008] Preferably, an oil return filter screen is vertically fixed at the bottom of the oil return cavity, and the oil return filter screen coaxially abuts against the orifice of the adjacent oil return hole.

[0009] Preferably, a first pressure oil groove is distributed at intervals on the lower surface of the U-shaped guide rail. An introduction groove is provided in parallel inside the U-shaped guide rail, and the introduction groove is in communication with all the first pressure oil grooves.

[0010] Preferably, oil passing grooves are distributed at intervals on the left and right sides of the lower pull bracket. A second pressure oil groove is distributed at intervals on the upper surface of the lower pressing guide rail, and a lead-out groove is provided between two adjacent second pressure oil grooves. The lead-out groove is in communication with the oil passing groove.

[0011] Preferably, a guide groove is provided in the center of the bottom of the U-shaped guide rail chute. A guide strip is integrally connected to the bottom surface of the U-shaped guide rail, and the guide strip is correspondingly slidably connected inside the guide groove.

[0012] Compared with the prior art, the present invention has the following advantages:

[0013] 1. The closed-type hydrostatic guide rail structure provided by the present invention simplifies the entire guide rail system through the reasonable design of the guide rail base, the lower pressing guide rail, the moving slide and the lower pull bracket, and is stable and reliable. When the throttle valve has problems, the accuracy of the guide rail and the normal operation of the equipment can still be guaranteed.

[0014] 2. The present invention adopts a U-shaped guide rail structure, which increases the contact area of the guide rail, makes the force on the chute more balanced, and reduces the friction on the guide rail.

[0015] 3. The present invention makes the positioning of the guide rail simpler through the simple cooperation of the mechanical structure.

[0016] 4. The pressure oil grooves on the U-shaped guide rail can collect dust during operation in a dusty environment, achieving an effective sound insulation effect. Description of the Drawings

[0017] Figure 1 It is a three-dimensional structural schematic diagram of the whole of the present invention.

[0018] Figure 2 This is a schematic structural diagram of the overall explosion of the present invention.

[0019] Figure 3 This is a schematic structural diagram of the overall cross-section of the present invention.

[0020] Figure 4 This is a schematic three-dimensional structural diagram of the guide rail base as a whole.

[0021] Figure 5 This is a schematic perspective structural diagram of the moving slide as a whole.

[0022] Figure 6 This is a schematic three-dimensional structural diagram of the U-shaped guide rail as a whole.

[0023] Figure 7 This is a schematic three-dimensional structural diagram of the downward pressure guide rail as a whole.

[0024] Figure 8 This is a schematic three-dimensional structural diagram of the oil return baffle as a whole.

[0025] Wherein:

[0026] 10 - Guide rail base; 101 - U-shaped guide rail chute; 102 - Guide groove; 103 - Oil storage cavity; 104 - Oil return hole;

[0027] 20 - Moving slide; 201 - Oil passing hole; 202 - Oil injection hole;

[0028] 30 - U-shaped guide rail; 301 - Pressure oil groove I; 302 - Introduction groove; 303 - Guide strip;

[0029] 40 - Pull-down bracket; 401 - Oil passing groove;

[0030] 50 - Downward pressure guide rail; 501 - Pressure oil groove II; 502 - Export groove;

[0031] 60 - L-shaped pressing plate;

[0032] 70 - Inlet oil pipe;

[0033] 80 - Oil return baffle; 801 - Oil return cavity;

[0034] 90 - Oil return filter screen. Specific embodiments

[0035] To make the technical means, creative features, achieved purposes and effects of the present invention easy to understand, the present invention will be further described below in conjunction with specific embodiments.

[0036] As Figures 1 to 8As shown in the figure, a U-shaped closed hydrostatic guide rail structure with a sound insulation function includes a guide rail base 10 and a moving slide 20. On the upper side of the guide rail base 10, a pair of U-shaped guide rail chutes 101 are symmetrically arranged on the left and right. On the lower side of the moving slide 20, a pair of U-shaped guide rails 30 are symmetrically installed on the left and right. The U-shaped guide rails 30 are correspondingly slidably connected in the U-shaped guide rail chutes 101, and a pressure oil film with a thickness of 0.03 - 0.06 mm is formed between the two. In the middle of the lower side of the moving slide 20, a "︹"-shaped downward pull bracket 40 is installed, and a pair of downward pressure guide rails 50 are symmetrically installed on the left and right sides of the downward pull bracket 40. On the upper side of the guide rail base 10, a pair of L-shaped pressing plates 60 are symmetrically installed on the left and right. The downward pressure guide rails 50 are correspondingly slidably connected below the L-shaped pressing plates 60, and a pressure oil film with a thickness of 0.03 - 0.06 mm is formed between the two. The moving slide 20 is used to support and install a grinding head or other functional components. The moving slide 20 can overcome the overturning moment, and achieve a frictionless sliding fit between the two by using the pressure oil film between the U-shaped guide rails 30 and the U-shaped guide rail chutes 101, and achieve a frictionless sliding fit between the two by using the pressure oil film between the downward pressure guide rails 50 and the L-shaped pressing plates 60, so that all the guide rails are completely in a hydraulic suspension state.

[0037] In this embodiment, an oil storage cavity 103 is provided inside the guide rail base 10. The guide rail base 10 is provided with an oil return hole 104 beside the end of the U-shaped guide rail chute 101, and the oil return hole 104 is communicated with the oil storage cavity 103. Inside the moving slide 20, a pair of T-shaped oil passing holes 201 are symmetrically arranged on the left and right, and a row of oil spraying holes 202 are provided below the oil passing holes 201. The oil spraying holes 202 are directly above the L-shaped pressing plates 60 on the same side. A pair of oil inlet pipes 70 are symmetrically connected to the left and right sides of the moving slide 20, and the oil inlet pipes 70 are communicated with the adjacent oil passing holes 201. The guide rail base 10 is provided with oil return blocks 80 at both ends of the U-shaped guide rail chute 101. An oil return cavity 801 is provided inside the oil return blocks 80, and the oil return cavity 801 is communicated with the oil storage cavity 103 through the oil return hole 104. The slide rail oil can be pumped into the oil passing holes 201 through the oil inlet pipes 70, and then sprayed onto the top surface of the L-shaped pressing plates 60 by the oil spraying holes 202. Then, part of the oil forms a pressure oil film with a thickness of 0.03 - 0.06 mm between the U-shaped guide rails 30 and the U-shaped guide rail chutes 101, and another part of the oil forms a pressure oil film with a thickness of 0.03 - 0.06 mm between the downward pressure guide rails 50 and the L-shaped pressing plates 60. Part of the oil overflowing from the U-shaped guide rail chute 101 is temporarily stored through the oil return cavity 801 on the oil return block 80. Under the action of gravity, the heavier oil dirt will precipitate in the oil return cavity 801, and the cleaner oil will return to the oil storage cavity 103 inside the guide rail base 10 through the oil return hole 104.

[0038] In this embodiment, an oil return filter screen 90 is vertically fixed to the bottom of the oil return chamber 801, and the oil return filter screen 90 coaxially abuts against the orifice of the adjacent oil return hole 104. The relatively clean oil in the oil return chamber 801 can be filtered by the oil return filter screen 90, and then the filtered oil returns to the oil storage chamber 103 in the guide rail base 10 through the oil return hole 104 to achieve recycling.

[0039] In this embodiment, a first pressure oil groove 301 is spacedly distributed on the lower surface of the U-shaped guide rail 30, an introduction groove 302 is arranged in parallel on the inner side of the U-shaped guide rail 30, and the introduction groove 302 communicates with all the first pressure oil grooves 301. The slide rail oil flows into the first pressure oil groove 301 through the introduction groove 302, and a pressure oil film with a thickness of 0.03 - 0.06 mm is formed between the U-shaped guide rail 30 and the U-shaped guide rail chute 101.

[0040] In this embodiment, oil passing grooves 401 are spacedly distributed on the left and right sides of the lower pull bracket 40, a second pressure oil groove 501 is spacedly distributed on the upper surface of the lower pressure guide rail 50, and a lead-out groove 502 is arranged between two adjacent second pressure oil grooves 501. The lead-out groove 502 communicates with the oil passing grooves 401. The slide rail oil flows into the second pressure oil groove 501 through the oil passing grooves 401 and the lead-out groove 502, and a pressure oil film with a thickness of 0.03 - 0.06 mm is formed between the lower pressure guide rail 50 and the L-shaped pressing plate 60.

[0041] In this embodiment, a guiding groove 102 is centrally arranged at the bottom of the U-shaped guide rail chute 101, a guiding strip 303 is integrally connected to the bottom surface of the U-shaped guide rail 30, and the guiding strip 303 is correspondingly slidably connected in the guiding groove 102. Through the sliding fit between the guiding strip 303 and the guiding groove 102, the stability of the U-shaped guide rail 30 during operation in the U-shaped guide rail chute 101 can be maintained.

[0042] The working principle of this U-shaped closed hydrostatic guide rail structure with a sound absorption function:

[0043] During normal operation, there is a pressure oil film with a thickness of 0.03 - 0.06 mm between the U-shaped guide rail 30 and the U-shaped guide rail chute 101, enabling all guide rails to be in a fully hydrostatic suspension state. As a result, the frictional force is almost zero. Even if the oil passages in the vertical direction are blocked and there is no pressure oil film between the U-shaped guide rail 30 and the U-shaped guide rail chute 101, due to the existence of gravity, the U-shaped guide rail 30 on the moving slide 20 will closely fit with the U-shaped guide rail chute 101 on the guide rail base 10 and continue to maintain the normal operation of the equipment relying on its own fitting accuracy, providing a reliable guarantee for the use of the equipment and enhancing the stability of the equipment operation. At the same time, the over-positioning fit and the enlarged mating area of the two sets of symmetrically arranged U-shaped guide rails 30 and U-shaped guide rail chutes 101 make the rigidity of this type of guide rail stronger. And because the frictional forces of the two guide rails are the same, the guiding of the moving slide 20 is more accurate, especially suitable for scenarios where the load above the moving slide 20 changes continuously. Meanwhile, the oil film between the U-shaped guide rail 30 and the U-shaped guide rail chute 101 can guide dust into the oil return cavity 801 in a dusty environment, thus playing a role in noise reduction.

[0044] Therefore, the above-disclosed embodiments are illustrative in all respects and not exclusive. All changes within the scope of the present invention or within the scope equivalent to the present invention are encompassed by the present invention.

Claims

1. A U-shaped closed hydrostatic guide rail structure with a silencing function, comprising a guide rail base (10) and a movable slide (20), characterized in that: A pair of U-shaped guide rail grooves (101) are symmetrically arranged on the upper side of the guide rail base (10); a pair of U-shaped guide rails (30) are symmetrically installed on the lower side of the movable slide (20); the U-shaped guide rails (30) are correspondingly slidably connected in the U-shaped guide rail grooves (101) and form a 0.03-0.06 mm pressure oil film between the two; a "︹"-shaped pull-down bracket (40) is centrally installed on the lower side of the movable slide (20); a pair of downward pressing guide rails (50) are symmetrically installed on the left and right sides of the pull-down bracket (40); a pair of L-shaped pressing plates (60) are symmetrically installed on the upper side of the guide rail base (10); the downward pressing guide rails (50) are correspondingly slidably connected below the L-shaped pressing plate (60) and form a 0.03-0.06 mm pressure oil film between the two.

2. A U-shaped closed static pressure guide rail structure with a silencing function according to claim 1, characterized in that: An oil storage chamber (103) is provided inside the guide rail base (10), an oil return hole (104) is provided on the side of the end of the U-shaped guide rail slide groove (101) of the guide rail base (10), and the oil return hole (104) and the oil storage chamber (103) are communicated with each other, a pair of T-shaped oil holes (201) are symmetrically provided inside the movable slide (20), and a row of oil injection holes (202) are provided below the oil holes (201), and the oil injection holes (202) are located on the same side of the L-shaped pressure hole (201). Directly above the plate (60), a pair of oil inlet pipes (70) are symmetrically connected to the left and right sides of the movable slide (20), and the oil inlet pipes (70) are interconnected with adjacent oil holes (201), and the guide rail base (10) is installed with oil return blocks (80) at both ends of the U-shaped guide rail groove (101), and an oil return cavity (801) is provided inside the oil return block (80), and the oil return cavity (801) is interconnected with the oil storage cavity (103) through the oil return hole (104).

3. A U-shaped closed static pressure guide rail structure with a silencing function according to claim 2, characterized in that: An oil return filter (90) is vertically fixed to the bottom of the oil return chamber (801), and the oil return filter (90) is coaxially pressed against the opening of the adjacent oil return hole (104).

4. The U-shaped closed static pressure guide rail structure with a silencing function according to claim 1 is characterized in that: Pressure oil grooves (301) are arranged at intervals on the lower surface of the U-shaped guide rail (30), and introduction grooves (302) are arranged in parallel on the inner side of the U-shaped guide rail (30), and the introduction grooves (302) are interconnected with all the pressure oil grooves (301).

5. The U-shaped closed static pressure guide rail structure with a silencing function according to claim 1 is characterized in that: The left and right sides of the pull-down bracket (40) are provided with oil passage grooves (401) spaced apart, the upper surface of the press-down guide rail (50) is provided with pressure oil grooves (501) spaced apart, and a guide groove (502) is provided between two adjacent pressure oil grooves (501), and the guide groove (502) is communicated with the oil passage groove (401).

6. The U-shaped closed static pressure guide rail structure with a silencing function according to claim 1 is characterized in that: A guide groove (102) is provided in the center of the bottom of the U-shaped guide rail slide groove (101), and a guide bar (303) is integrally connected to the bottom surface of the U-shaped guide rail (30), and the guide bar (303) is correspondingly slidably connected in the guide groove (102).

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