Automatic horizontal air support system

Abstract

The automatic horizontal air support system of the present invention relates to an air support structure for precision mechanical equipment. Its purpose is to provide an automatic horizontal air support system that can automatically replenish air and has good support stability. The automatic horizontal air support system of the present invention includes an air floating main body. An upper cavity and a lower cavity are arranged inside the air floating main body. The lower cavity communicates with the upper cavity and an external air source respectively. An airbag is arranged on the air floating main body. A leather cavity fixing piece is arranged on the airbag. A conical barrel is arranged below the leather cavity fixing piece. The conical barrel is located in the upper cavity below the airbag. An upper layer fixing piece of the airbag is arranged above the airbag. The upper layer fixing piece of the airbag is connected with a connecting rod. A tip is arranged on the bottom surface of the connecting rod. A conical surface support pad is placed in the circular groove on the bottom surface of the conical barrel. The tip is in contact with the surface of the conical surface support pad. A rotation limiting ring is arranged on the bottom surface of the conical barrel. A cylinder is installed on the upper layer fixing piece of the airbag. The cylinder drives the switch pressing plate of the switch valve that controls the air intake of the lower cavity to move.

Description

Technical Field

[0001] The present invention relates to the technical field of pneumatic support, in particular to an automatic horizontal air support system. Background Art

[0002] In modern industry, all moving machinery is subject to vibration. Vibration is transmitted to the machine itself and its accessories, causing fatigue in all affected objects. In the case of machine tools, this can affect the machining accuracy of parts. Among current vibration isolation technologies, air-bearing isolators far outperform most other types, reducing vibration fatigue by 99% due to their use of advanced air support technology. Air support technology is increasingly being used to isolate and reduce vibration and noise in various ultra-precision CNC machine tools and other precision machinery and testing equipment, including lathes, grinders, test benches, four- and five-axis machine tools, coordinate measuring machines, and optical and laser instruments. Air-bearing vibration isolation technology is an essential, fundamental component of many precision CNC machine tools, and its vibration reduction performance determines the accuracy level of the machine tool. Air-bearing vibration isolators offer superior vibration reduction performance compared to springs and rubber-based systems. Their advantages include extremely high vibration isolation efficiency, compact size, and ease of installation. However, their disadvantages are that they require semi-annual inspection and refilling of air pressure if they become low.

[0003] In order to solve the defects of the existing air-floating shock absorber, there is an urgent need for an air-floating shock absorber structure that can automatically replenish air while ensuring the supporting effect. Summary of the Invention

[0004] The technical problem to be solved by the present invention is to provide an automatic horizontal air support system which can automatically replenish air and has good support stability.

[0005] The automatic horizontal air support system of the present invention includes an air flotation main body, an upper cavity and a lower cavity are arranged inside the air flotation main body, the lower cavity is communicated with the upper cavity and an external air source respectively, an air bag is arranged on the air bag, a leather cavity fixing part is arranged on the air bag, a conical barrel is arranged below the leather cavity fixing part, the conical barrel is located in the upper cavity below the air bag, an upper-layer fixing part of the air bag is arranged above the air bag, the upper-layer fixing part of the air bag is connected to a connecting rod, a top is provided on the bottom surface of the connecting rod, a conical support pad is placed in a circular groove on the bottom surface of the conical barrel, the top is in contact with the upper surface of the conical support pad, a cylinder is installed on the upper-layer fixing part of the air bag, and the cylinder drives the switch pressure plate of the switch valve that controls the air intake of the lower cavity to move.

[0006] The automatic horizontal air support system of the present invention, wherein a second air inlet throttle valve and an air outlet interface are provided on the outside of the air float body, the second air inlet throttle valve is connected to the interior of the upper cavity, and the air outlet interface is connected to the interior of the lower cavity, and the second air inlet throttle valve and the air outlet interface are connected through a pipeline.

[0007] The automatic horizontal air support system of the present invention, wherein a rotating limit ring is installed on the bottom surface of the conical barrel, the rotating limit ring fixes the conical surface support pad in the circular groove of the conical barrel, and also limits the movement range of the tip.

[0008] The automatic horizontal air support system of the present invention, wherein buffers are evenly installed on the inner wall of the leather cavity fixing member, and the buffers are in contact with the side wall of the connecting rod.

[0009] The automatic horizontal air support system of the present invention, wherein a swivel screw is arranged on the side surface of the upper fixing member of the airbag, a key ring is connected below the swivel screw, a pressure relief valve is connected below the key ring, and the pressure relief valve is communicated with the inside of the lower cavity through an external thread elbow.

[0010] The automatic horizontal air support system of the present invention, wherein a lock nut joint is arranged at the air inlet end of the switch valve, and a microporous setscrew is arranged inside the lock nut joint.

[0011] The automatic horizontal air support system of the present invention, wherein a second air inlet interface is arranged at the air outlet end of the switch valve, and the second air inlet interface is communicated with the inside of the lower cavity.

[0012] The automatic horizontal air support system of the present invention, wherein an airbag fixing member is installed above the airbag, and the airbag fixing member is used to press the airbag.

[0013] The automatic horizontal air support system of the present invention, which further includes a lower fixing plate, and the air floating main body is installed on the lower fixing plate.

[0014] The automatic horizontal air support system of the present invention, wherein an annular groove is machined on the contact surface between the air floating main body and the lower fixing plate, and a PTFE sealing ring is placed in the annular groove.

[0015] The difference between the automatic horizontal air support system of the present invention and the prior art is that the automatic horizontal air support system of the present invention can automatically supplement air through the switch valve when the height of the support system changes by arranging a cylinder outside the air floating main body. An upper cavity and a lower cavity are arranged inside the air floating main body. Since the lower cavity is communicated with the upper cavity, when the gas in the lower cavity is discharged, the gas in the upper cavity will quickly return to the lower cavity along the original path. As the gas in the upper cavity gradually decreases, the height of the upper fixing member of the airbag and the associated members below also gradually decreases until the adapter touches the switch pressing plate again, and the switch valve will refill the air support system again. Therefore, the air support system has the function of automatically adjusting the level.

[0016] The following further describes the automatic horizontal air support system of the present invention with reference to the accompanying drawings. Description of the Drawings

[0017] Figure 1 is a perspective view of the automatic horizontal air support system of the present invention;

[0018] Figure 2 is the front view of the automatic horizontal air support system of the present invention;

[0019] Figure 3 is Figure 2 the sectional view taken along the line A-A in

[0020] Figure 4 is the side view of the switching valve in the automatic horizontal air support system of the present invention;

[0021] Figure 5 is Figure 4 the sectional view taken along the line B-B in

[0022] The markings in the figure are indicated as follows: 1 - lower fixing plate; 2 - air floating main body; 3 - airbag; 4 - airbag fixing part; 5 - upper layer fixing part of airbag; 6 - buffer; 7 - connecting rod; 8 - leather cavity fixing part; 9 - cone barrel; 10 - tip; 11 - rotation limit ring; 12 - conical surface support pad; 13 - tetrafluoroethylene sealing ring; 14 - first intake throttle valve; 15 - cylinder; 16 - ball joint screw; 17 - key ring; 18 - pressure relief valve; 19 - external thread elbow; 20 - first intake interface; 21 - second intake interface; 22 - adapter; 23 - switch pressing plate; 24 - switching valve; 25 - lock nut joint; 26 - second intake throttle valve; 27 - outlet interface; 28 - micro hole set screw. Specific embodiments

[0023] The following embodiments are used to illustrate the present invention, but are not used to limit the scope of the present invention.

[0024] As Figure 1 and Figure 2 shown, the automatic horizontal air support system of the present invention includes a lower fixing plate 1, and the lower fixing plate 1 serves as the base of the support system. An air floating main body 2 is fixedly installed above the lower fixing plate 1, and an annular groove is machined on the contact surface between the air floating main body 2 and the lower fixing plate 1, and a tetrafluoroethylene sealing ring 13 is placed in the annular groove.

[0025] A switching valve 24, a first intake interface 20, an outlet interface 27 and an external thread elbow 19 are arranged at the lower part outside the air floating main body 2. The switching valve 24 is fixed on the air floating main body 2, and a lock nut joint 25 is arranged at the intake end of the switching valve 24, and the filtered gas can enter the inside of the switching valve 24 from the lock nut joint 25. As Figure 5 shown, a micro hole set screw 28 is arranged inside the lock nut joint 25, and the micro hole set screw 28 can play roles such as throttling, pressure regulation, buffering and shock absorption. A switch pressing plate 23 is connected to the switching valve 24, and the switch pressing plate 23 controls the opening and closing of the valve inside the switching valve 24. An adapter 22 is installed on the switch pressing plate 23, and a cylinder 15 is connected to the adapter 22.

[0026] A first intake throttle valve 14 is installed on the air cylinder 15. The filtered gas can enter the air cylinder 15 through the first intake throttle valve 14 to push the piston rod to move downward. When the air cylinder 15 moves downward to press the switch pressing plate 23, the switch valve 24 opens and the gas can enter the interior of the switch valve 24. A second intake interface 21 is provided on the switch valve 24, and the second intake interface 21 is communicated with the air outlet of the switch valve 24.

[0027] The second intake interface 21 is connected to the first intake interface 20 through a pipeline. The first intake interface 20, the air outlet interface 27, and the external thread elbow 19 are all communicated with the lower cavity inside the air floating main body 2. The external thread elbow 19 is of a 1 / 4 elbow structure.

[0028] As Figure 1 shown, a second intake throttle valve 26 is provided on the upper part of the outside of the air floating main body 2. The second intake throttle valve 26 is connected to the air outlet interface 27 through a pipeline, and the second intake throttle valve 26 is communicated with the upper cavity inside the air floating main body 2.

[0029] As Figure 3 shown, an upper cavity and a lower cavity are provided inside the air floating main body 2. The tetrafluoroethylene sealing ring 13 is used to seal the gas in the lower cavity. The upper cavity and the lower cavity are not directly communicated, but are communicated through the second intake throttle valve 26 and the air outlet interface 27 outside the air floating main body 2.

[0030] An airbag 3 is installed on the air floating main body 2, and an airbag fixing part 4 is installed above the airbag 3. The airbag fixing part 4 is used to press the airbag 3. A leather cavity fixing part 8 is provided on the airbag 3, and a cone barrel 9 is installed below the leather cavity fixing part 8. The cone barrel 9 is located in the upper cavity below the airbag 3. When the upper cavity is inflated, the cone barrel 9 and the airbag 3 can be pushed to move upward.

[0031] An airbag upper fixing part 5 is installed on the airbag fixing part 4. A connecting rod 7 is fixedly connected to the lower plane of the airbag upper fixing part 5. The upper end of the connecting rod 7 is connected to the bed of the machine tool, and a center point drill 10 is installed on the bottom surface of the connecting rod 7. The air cylinder 15 is installed on the lower plane of the airbag upper fixing part 5.

[0032] A conical surface support pad 12 is placed in the circular groove on the bottom surface of the cone barrel 9. The bottom surface of the cone barrel 9 is flush with the upper surface of the conical surface support pad 12. A rotation limiting ring 11 is installed on the bottom surface of the cone barrel 9. The rotation limiting ring 11 fixes the conical surface support pad 12 in the circular groove of the cone barrel 9 and limits the movement range of the center point drill 10. The center point drill 10 passes through the rotation limiting ring 11 and contacts the upper surface of the conical surface support pad 12.

[0033] Three hydraulic buffers 6 are evenly installed on the inner wall of the leather cavity fixing part 8. The buffers 6 are in contact with the side wall of the connecting rod 7 and are used to control the swing and keep the connecting rod 7 that can move up and down concentric with the air floating main body 2 in the axial direction.

[0034] A knuckle screw 16 is installed on the side of the upper airbag fixing member 5. A key ring 17 is connected below the knuckle screw 16, and a pressure relief valve 18's pressure relief valve is connected below the key ring 17. The air inlet hole of the pressure relief valve 18 communicates with an external thread elbow 19. When the upper airbag fixing member 5 exceeds the limit height, the knuckle screw 16 will drive the key ring 17 below to pull up the pressure relief valve of the pressure relief valve 18, and the gas in the lower cavity will enter the air inlet hole of the pressure relief valve 18 from the external thread elbow 19 for pressure relief.

[0035] When the automatic horizontal air support system of the present invention is in use, the filtered gas enters the cylinder 15 from the first intake throttle valve 14. The gas pushes the piston rod and the adapter 22 downward to the upper surface of the switch pressure plate 23. When the switch pressure plate 23 is touched, the switch valve 24 changes from the normally closed state (no gas passage) to the normally open state. At this time, the filtered gas can enter through the lock nut joint 25, and after throttling and pressure reduction by the micro-hole set screw 28, it enters the air inlet hole of the switch valve 24. After the gas is discharged from the air outlet hole of the switch valve 24, it first enters the second intake interface 21, then enters the first intake interface 20, and then enters the lower cavity. When the lower cavity is filled with gas, the gas will be discharged from the air outlet interface 27 and enter the air inlet of the second intake throttle valve 26, and then enter the upper cavity. The gas continues to be introduced until the rubber airbag 3 deforms flexibly and bulges upward, driving the upper airbag fixing member 5, the buffer 6, the connecting rod 7, the leather cavity fixing member 8, the cone barrel 9, the top 10, the rotation limit ring 11, and the conical surface support pad 12 to move upward, so that the air support system can be adjusted in six dimensions of up and down, front and back, and left and right.

[0036] When the upper airbag fixing member 5 exceeds the limit height, the knuckle screw 16 fixed on the side of the upper airbag fixing member 5 will drive the key ring 17 below to pull up the pressure relief valve of the pressure relief valve 18, and the gas in the lower cavity will enter the air inlet hole of the pressure relief valve 18 from the external thread elbow 19, and then be discharged from the exhaust hole of the pressure relief valve 18. Since the lower cavity communicates with the upper cavity, when the gas in the lower cavity is discharged, the gas in the upper cavity will quickly return to the lower cavity along the original path. As the gas in the upper cavity gradually decreases, the height of the upper airbag fixing member 5 and the associated components below also gradually decreases until the adapter 22 touches the switch pressure plate 23 again, and the switch valve 24 will inflate the air support system again. Therefore, the air support system has the function of automatically adjusting the level. If you want the air support system to maintain at a suitable height, it can be achieved by adjusting the distance between the front end of the piston rod and the upper surface of the adapter 22.

[0037] Inside the air floating main body 2, the upper cavity is equivalent to an airbag 3. A cone barrel 9 is suspended on the airbag 3. The upper part of the connecting rod 7 is connected to the bed body, and the lower part is in spherical contact P with the bottom of the cone barrel 9. After the airbag 3 is inflated, the cone barrel 9 can swing slightly around the center O point of the airbag 3 and the contact spherical point P. There is a damper between the connecting rod 7 and the cone barrel 9.

[0038] When there is vibration in the up and down direction from the outside world, the lower fixing plate 1 sways up and down. Through the slight compression of the air in the airbag 3, the vibration transmitted by the airbag 3 to the machine tool connecting rod 7 is greatly attenuated.

[0039] When there is vibration in the horizontal direction from the outside world, the lower fixing plate 1 sways horizontally. After the airbag 3 is inflated, the contact ball point P swings slightly around the center O point of the airbag 3. The lower connecting rod 7 drives the upper fixing part 5 of the airbag to swing horizontally. The action of the damper causes the rapid attenuation of the swing of the cone barrel 9. The machine tool bed can quickly maintain stability and prevent long-term vibration or resonance. Through the up and down swaying of the airbag 3 and the swinging of the cone barrel 9, the vibration transmitted from the outside world to all directions of the machine tool bed can be effectively shielded.

[0040] When the system is actually installed, four sets of suspended air floating vibration isolation systems can be used to support the machine tool bed, and an automatic level adjustment valve can be installed to effectively isolate the machine tool from external vibration in a horizontal state, and finally achieve an ideal processing effect.

[0041] The automatic level air support system of the present invention can solve the defects of existing air floating shock absorbers, improve the machining accuracy of parts and the working stability of machine tools, meet the requirements of existing precision and ultra-precision CNC machine tools, and make the automatic level air support system meet the requirements of automatic level adjustment, small volume, convenient and fast installation, large load-bearing capacity, shock absorption and noise reduction, stable operation, large application range, and long service life. It can be widely used in shock absorption and noise reduction of various precision mechanical equipment and precision test equipment such as ultra-precision CNC machine tools, such as lathes, grinders, test benches, four-axis machine tools, five-axis machine tools, coordinate measuring machines, optical and laser instruments, etc.

[0042] Although the present invention has been described in detail above with general descriptions and specific embodiments, based on the present invention, some modifications or improvements can be made, which are obvious to those skilled in the art. Therefore, these modifications or improvements made without departing from the spirit of the present invention all fall within the scope of protection required by the present invention.

Claims

1. An automatic horizontal air support system, characterized in that: It includes an air flotation main body. An upper cavity and a lower cavity are arranged inside the air flotation main body. The lower cavity is communicated with the upper cavity and an external air source respectively. An airbag is arranged on the air flotation main body. A leather cavity fixing piece is arranged on the airbag. A conical barrel is arranged below the leather cavity fixing piece. The conical barrel is located in the upper cavity below the airbag. An upper layer fixing piece of the airbag is arranged above the airbag. The upper layer fixing piece of the airbag is connected with a connecting rod. A tip is arranged on the bottom surface of the connecting rod. A conical surface support pad is placed in the circular groove on the bottom surface of the conical barrel. The tip is in contact with the upper surface of the conical surface support pad. A cylinder is installed on the upper layer fixing piece of the airbag. The cylinder drives the switch pressing plate of the switch valve for controlling the air intake of the lower cavity to move. There is a damper between the connecting rod and the conical barrel. Among them, a second intake throttle valve and an air outlet interface are arranged outside the air flotation main body. The second intake throttle valve is communicated with the inside of the upper cavity. The air outlet interface is communicated with the inside of the lower cavity. The second intake throttle valve and the air outlet interface are communicated through a pipeline. A rotary limit ring is installed on the bottom surface of the conical barrel. The rotary limit ring fixes the conical surface support pad in the circular groove of the conical barrel. And A number of buffers are evenly installed on the inner wall of the leather cavity fixing piece. The buffers are in contact with the side wall of the connecting rod.

2. The automatic horizontal air support system according to claim 1, wherein: A swivel screw is arranged on the side surface of the upper layer fixing piece of the airbag. A key ring is connected below the swivel screw. A pressure relief valve is connected below the key ring. The pressure relief valve is communicated with the inside of the lower cavity through an external thread elbow.

3. The automatic horizontal air support system according to claim 1, wherein: A lock nut joint is arranged at the air intake end of the switch valve. A microporous set screw is arranged inside the lock nut joint.

4. The automatic horizontal air support system according to claim 1 or 3, characterized in that: A second intake interface is arranged at the air outlet end of the switch valve. The second intake interface is communicated with the inside of the lower cavity.

5. The automatic horizontal air support system according to claim 1, wherein: An airbag fixing piece is installed above the airbag. The airbag fixing piece is used to press the airbag.

6. The automatic horizontal air support system according to claim 1, characterized in that: It also includes a lower fixing plate. The air flotation main body is installed on the lower fixing plate.

7. The automatic horizontal air support system according to claim 6, wherein: An annular groove is machined on the contact surface between the air flotation main body and the lower fixing plate. A tetrafluoroethylene sealing ring is placed in the annular groove.

Images