TW200536687A - Vibration damping device for pneumatic tool - Google Patents

Abstract

A vibration damping device for pneumatic tools, including: a body having a chamber therein, the chamber communicating with an air conduit controlled by a switch base for its on/off state; a buffer sliding base engaging in the chamber, the buffer sliding base being driven to slide in the body chamber by air pressure, so as to form an airtight compartment between the chamber and the rear end of the sliding base, the buffer sliding base being provided therein with a directional control valve and an actuating base and then assembled in placed with the body by a mounting base. As such, upon activating the actuating base, the reaction force generated by the actuating base upon colliding a workpiece, will be transmitted by the buffer sliding base, where the buffer sliding base would retreat to compress air in the airtight compartment whereby the buffering effect provided by the air compartment would reduce the vibration force encountered during operation thereby enhancing comfort and efficiency during operation.

Description

200536687 · V. Description of the invention (1) [Technical field to which the invention belongs] The present invention particularly relates to a method of utilizing air in a closed air chamber to provide a pneumatic cushioning effect when the pneumatic tool is operated to reduce operating vibration. . Vibration damping device for pneumatic tools. [Previous technology] According to the method, the pneumatic tool can be roughly divided into linear reciprocating type and rotary type. Regardless of linear reciprocating type or rotary type, when it comes into contact with the work piece, the work piece will generate a reaction force and return it. On the body of the pneumatic tool, the operator will feel uncomfortable when holding the operation, which will reduce _ work efficiency. In order to reduce the vibration caused by the reaction force during operation, that is, _ an operator adds a buffer device to the pneumatic tool; Please refer to Figures 1 and 2 for Taiwan Patent Application No. 9 1 2 1 8 8 2 5 "Damping device for reciprocating pneumatic tools", which is screwed together on the inner surface of the joint part 10 of the body 10 A buffer assembly 1 1 having a horizontal and straight communication slot 1 1 1 is provided with a vent valve 12 at one end of the buffer assembly 1 1 and a screw rod 1 3 with a gas push shaft 1 3 1, and then the rod 1 3 Screwed into the inner surface of the body joint 1 0 1 with a protective tube body 14 having an air inlet 141. When high pressure air passes from the air inlet 102 through the air inlet 1 of the protective tube body 1 4 1 into the slot of the buffer assembly 1 1 After 11 1 will flow to the ventilation valve 1 2 and use the ventilation valve 1 2 The control of the valve disc guides the high-pressure air to the air channel 1 3 2 on the side wall of the actuating rod 1 3, and then pushes the air pushing shaft 1 3 1 back in the actuating rod 13; refer to Figure 3, when the air pushing When the shaft 1 3 1 is pushed back to the position close to the ventilating valve 12, the air pushed by the air pushing shaft 1 3 1 in the actuating rod 13 will shift the valve plate of the venting valve 12 and reverse the pressure. Air turns into the actuator 1 3

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Page 5 200536687 V. Description of the invention (2) Rear end and pushing against the air push shaft 1 3 1 Push forward the impact knocker 1 5 at this time. At this time, the air at the front end of the actuating rod 1 3 will be pushed and carried by the airway. 1 3 2 Reverse flow to the ventilating valve 1 2, so that the valve plate of the ventilating valve 12 is displaced and re-oriented again, and then the ventilating valve 12 is repeatedly switched in a flow-controlled manner, so that the air pushing shaft 1 3 1 For reciprocating telescopic impact; since the air push shaft 1 3 1 hits the work piece when the ejector knock rod 15 hits the work piece, the work piece generates a reaction force and is transmitted back to the pneumatic tool, so it is provided with a buffer assembly 1 1 , And the horizontal and vertical cut grooves 1 1 1 on the buffer assembly 11 are used as guides to extend the travel of the shock wave to dissipate the energy of the shock wave, thereby reducing the vibration force to the operator; however, such a design still has The disadvantages are as follows: _ 1 · When the reaction force generated by the impact is transmitted back, its main force will be transmitted to the main body of the actuating rod 1 3, and the actuating rod 1 3 and the buffer assembly 1 1 and the protective tube 1 4 and the body 10 are rigidly connected to each other, so the vibration of the reaction force is still unavoidable. The grip portion 1 to 0 on the body, so that the buffer is limited. 2 · When the vibration caused by the reaction force cannot be effectively reduced, the connected components are easily damaged by the vibration, which reduces the service life. 3 · The buffer assembly 11 is provided with horizontal and vertical cut grooves 1 1 1. It is very difficult to process in practice, and the relative processing cost is too high. Obviously _ does not meet economic benefits. In view of this, the inventor has developed a pneumatic damping device through continuous research and design based on his many years of working experience to effectively improve the shortcomings of the conventional damping device. [Summary of the Invention]

Page 6 200536687 V. Description of the invention (3) The main object of the present invention is to provide a shock absorbing device for a pneumatic tool, which is mainly provided with a cavity in the body, and the cavity is connected with an opening and closing controllable by a switch seat. A trachea, a buffer slide is set in the chamber, and the buffer slide can be pushed and slid by high pressure gas in the body cavity, and then a closed air chamber is formed between the chamber and the rear end of the buffer slide, and the buffer slide A reversing valve and an actuating seat are installed in the seat, and the seat is limited to a fixed position; thereby, when the acting force of the acting seat and the work piece collide with each other, the vibration on the actuating seat can be transmitted to the buffer slide, The air in the closed air chamber is compressed by the buffer slide back, and the air chamber provides a pneumatic cushioning effect to effectively reduce the vibration force during operation and achieve the purpose of improving the comfort and efficiency of operation. Another object of the present invention is to provide a shock absorbing device for a pneumatic tool, in which a closed air chamber formed between a cavity and a rear end of a buffer slide seat communicates with an exhaust passage which can be opened and closed by a switch seat, so that The high-pressure gas in the enclosed gas chamber is relieved of pressure and closed before the actuation seat is operated to maintain the closed state of the air chamber; thereby, when the buffer slide retracts and compresses the air in the enclosed gas chamber, a smaller gas compression pressure can be achieved. , Resulting in a softer buffering effect. Another object of the present invention is to provide a shock absorbing device for a pneumatic tool, wherein another chamber is provided at the rear end of the chamber and the buffer slide, and the chamber is connected to the outside of the body by an air suction channel, and the air suction channel end is provided There is a non-return valve; thereby, when the buffer slide is pushed forward by the south-pressure gas in the body chamber, the chamber can use the suction pipe to suck the outside air to form a second air chamber and check the flow. The valve prevents air from being exhausted to the outside in the opposite direction, and provides another auxiliary pneumatic buffering effect when the buffer slide is retracted. 200536687 V. Description of the invention (4) [Embodiment] In order for your reviewing committee to have a deeper understanding of the present invention, a preferred embodiment is enumerated, and illustrated with the drawings as follows: Please refer to Figures 4 and 5, The main body 20 of the present invention has a handle portion 21 and a first chamber 2 2 and a second chamber 2 3 in a step-like shape. The handle portion 2 1 is provided with an air inlet pipe 24 connected to a high-pressure gas source and connected to the outside. The exhaust pipe 25, the intake pipe 24 and the exhaust pipe 25 are connected to a valve chamber 26. The valve chamber 26 is provided with air passages 2 7 and 2 8 communicating with the first chamber 22 at appropriate positions. The rear end of the second chamber 23 is provided with a suction channel 29 which communicates with the outside, and a check valve 3 0 is provided at the 9 9 end of the suction channel; the switch seat 40 is a valve chamber 2 assembled in the body 20 In 6, it includes a sleeve 4 1 and a pressing rod 4 2. A through hole 4 1 1 is provided in the sleeve 4 1 for installing the pressing rod 4 2, and a communicating hole 4 is provided in the sleeve 4 1. 1 1 and the perforation 412 of the airway 28, and the upper and lower positions on the outer ring surface of the sleeve 41 are connected to the through hole 4 1 1 and the upper cut groove 4 1 3, the lower cut groove 4 1 4 and the upper cut groove 41 3 corresponds to the airway 2 7, and the lower cutout 4 1 4 corresponds to the exhaust pipe 2 5. A pressing rod 4 2 can be moved in the socket 4 1 through hole 4 1 1, and one end has a baffle 4 2 1 There is an air storage channel 422 and air channels 423 and 4 2 4 communicating with the air storage channel 422, and a ring groove 4 2 5 is provided on the outer surface of the pressing rod 4 2. Therefore, when the pressing rod 4 2 is at the initial position, The baffle 4 2 1 will close the path of the valve chamber 2 6 to the gas storage channel 4 2 2, and the high-pressure gas from the gas inlet pipe 2 4 will not be sent to the gas storage channel 4 2 2; The diameter end 5 0 2 is sleeved in the second chamber 23 of the body 20 and the large diameter end

200536687 V. Description of the invention (5) 5 0 1 sets the position of the first chamber 2 2, a large-diameter end 50 1 is provided with a ring seat 5 0 3, a ring seat 5 0 3 and a connection to the airway 2 8 The side hole 5 0 4 is equipped with a ventilation valve 60 in the ring seat 5 0 3, which has an air inlet 60 1, a first air outlet 60 2, and a second air outlet 6 0 3 And a valve disc 6 0 4, an actuating seat 70 is screwed in from the outside of the ring seat 5 0 3, and abuts against the ventilation valve 60 0, and the actuating seat 70 is provided with a chamber 7 0 1 to An impact head 70 2 is provided, and the side wall of the actuating seat 70 is additionally provided with an air inlet pipe 70 3 communicating with the chamber 701. The end of the air inlet pipe 70 3 corresponds to the first air outlet 6 of the ventilation valve 60. 0 2, and the end of the chamber 7 0 1 corresponds to the second air outlet 6 0 3 of the ventilation valve 60, the chamber 7 0 1 is additionally provided with an exhaust hole 7 0 4 communicating with the outside, and a fixed seat 80, the end of the body is screwed with the body 20 to reach the limit buffer slide 50 in the first chamber 22 of the body 20, and the other fixed seat 80 is provided with a connecting actuating seat 7 0 exhaust hole 7 0 4 的 槽孔 8 0 1, a connector 90 is installed at one end of the actuating seat 70, which has a The ring 9 0 1 can compress the spring 9 0 2 to retract the steel ball 9 0 3 for assembling or replacing the knock rod 904. The knock rod 904-end extends into the chamber 701 of the actuating seat 70 for the impact head 7 0 2 impact, and then the workpiece is processed. Please refer to Figs. 6 and 7. When the lever 4 2 is pressed in the first stage, the baffle 4 2 1 moves backward, so that the air inlet pipe 2 4 passes through the valve chamber 2 6 from the air passage 4 2 3 and communicates with the air storage passage 4 A groove 413 is formed on the upper part 22 and the seat 41, and then communicates with the first chamber 22 through the air passage 27. At this time, the high-pressure gas introduced by the air inlet pipe 2 4 will push the buffer slide 50, the air exchange valve 6 0 and the actuating seat 70 slide outwards, while the buffering seat 50 and the first cavity 200536687 V. Description of the invention (6) The chamber 22 forms a first air chamber 221, and the first air chamber 221 is filled with high-pressure gas. In addition, the buffer slide 50 and the second chamber 23 form a second air chamber 23 1. When the second air chamber 23 1 is formed, it will be sucked from the air suction channel 2 and 9 through the check valve 3 0 due to the vacuum. Outside air, the air in the second air chamber 231 is at a normal pressure. Please refer to FIGS. 8 and 9. When the rod 4 2 is pressed in the second stage, although the air inlet pipe 24 communicates with the valve chamber 26 and still passes through the air passage 423, and communicates with the air storage passage 4 2 2, the air passage 4 2 3 causes Displaced to communicate

The groove 4 1 3 is cut above the socket 4 1, and the air intake path from the gas storage channel 4 2 2 to the first chamber 22 is closed. However, at this time, the ring groove 4 2 5 of the lever 4 2 will correspond to the socket. 4 1 upper slot 4 1 3 and lower slot 4 1 4 so that air passage 2 7 communicates with exhaust pipe 25 through upper slot 4 1 3, ring groove 4 2 5 and lower slot 4 1 4 The high-pressure gas in the first air chamber 22 1 is released to a normal pressure through the exhaust pipe 25. The purpose of this pressure relief is to make the buffer slide 50 back to compress the first air chamber 2 2 1. A softer cushioning effect can be obtained.

Please refer to Figs. 10 and 11. When the lever 4 2 is pressed in the third stage, the air intake path from the air channel 4 2 2 to the first chamber 22 is still closed, and the ring groove 4 2 5 will be disengaged. Corresponds to the upper slot 4 1 3 and the lower slot 4 1 4 of the socket 41, and closes the path of the air passage 27 to the exhaust pipe 25. At this time, the first air chamber 2 21 is a closed air chamber And the atmospheric pressure is maintained in the air chamber, but the air channel 4 2 4 of the rod 4 2 will be connected to the perforation 4 1 2 and the air channel 2 8, and communicate with the side hole 5 04 of the buffer slide 50, which can further increase the high pressure. Gas inlet ring seat 5 0 3 and ventilation valve 6 0

P.200536687 V. Description of the invention (7) The high-pressure gas enters the air inlet 6 0 1 of the ventilation valve 60 and enters the air inlet pipe 7 0 3 from the first air outlet 6 0 2. Entered the chamber 7 0 1 and pushed back against the impact head 7 0 2. Please refer to Figs. 12 and 13. Press the lever 4 2 to maintain the third stage of pressing (as in the state of Fig. 10). The impact head 7 0 2 in the chamber 7 0 1 moves back to approach the ventilation valve. At 0600, the impact head 7 0 2 pushed the air at the rear end of the chamber 701, and the air pushed the valve disc 6 0 4 from the second air outlet 603. At the same time, it pushed the high-pressure air backed by the impact head 7 0 2 It will be discharged from the exhaust hole 7 0 4 and the slot hole 8 0 1. After the valve disc 6 0 4 is pushed, it will close the path of the first air outlet 6 0 2 and enter the stomach while high pressure air enters the air channel 6 0 1 is switched into the second air passage 6 0 3, and high-pressure air enters the chamber 7 0 1 from the second air passage 6 0 3 and pushes the impact head 7 0 2 to exit. Please refer to Figures 1, 4 and 15. Pressing the lever 4 2 continuously maintains the third stage of compression (as shown in the state of Figure 10). The impact head 7 0 2 shoots out will hit the lever 9 0 4 vigorously, and The workpiece is processed. At this time, the impact head 702 pushes the air at the front end of the chamber 70 1, so that the air is reversed from the intake pipe 70 3 into the first air outlet 6 0 2, and then the valve plate 6 0 4 is pushed again. Reversing, and the reciprocating in and out movement of the impact head 702, continued to hit the knock rod 904. Please refer to Figs. 16 and 17. When the impact head 7 0 2 strongly strikes the knock rod 9 0 4 to process the machined part, the machined part will generate a reaction force and transmit it to the actuating seat 7 0. Actuating seat 70 will push the buffer slide 50 back, because the rear end of the buffer slide 50 has a closed first

Page 11 200536687 V. Description of the invention (8) The air chamber 2 2 1, so the buffer slide 50 can compress the normal-pressure air in the first air chamber 2 2 1 to provide a pneumatic buffer effect to effectively reduce the operation. The vibration force caused by the reaction force in addition, in addition, when the buffer slide 50 is retracted, the second air chamber 2 3 1 also closes the suction channel 2 9 in the reverse direction due to the check valve 30, making the second air chamber 2 3 1 also presents a closed air chamber, which also provides an auxiliary pneumatic cushioning effect. When the pressing lever 4 2 is released and then pressed again, the foregoing actions will be repeated to form the first air chamber 2 2 1 and the second air chamber 2 3 1 with buffering effect, and provide the operator with a better grip at any time. comfortability. The invention not only provides an effective pneumatic cushioning effect, but also the actuating seat and the buffering slide are not rigidly connected to the body, and the reaction force will not be directly transmitted to the handle, which greatly reduces the vibration force during operation and not only effectively improves the operation. Comfort and work efficiency, and increase the service life of the parts, so that it is practical and progressive, and filed a patent application according to law.

Page 12 200536687 Brief description of the drawings Figure 1: Exploded view of the parts of the conventional pneumatic tool buffer device. Fig. 2: Schematic diagram of the operation of a Xi'an type pneumatic tool buffer device (1). Fig. 3: Schematic diagram of the operation of the Xi-type pneumatic tool buffer device (2). Fig. 4: Exploded view of parts of the present invention. FIG. 5 is a sectional view of the combination of the present invention. Figure 6: Schematic diagram of the operation of the present invention (1). FIG. 7 is an enlarged schematic view of Part A of FIG. 6. Figure 8: Schematic diagram of the operation of the present invention (2). FIG. 9 is an enlarged schematic view of part B of FIG. 8. Fig. 10: Schematic diagram of the operation of the present invention (3). ® Figure 11: This is an enlarged view of Part C of Figure 10. Figure 12: Schematic diagram of the operation of the present invention (4). Fig. 13 is an enlarged schematic view of part D in Fig. 12. Figure 14: Schematic (5) of the operation of the present invention. FIG. 15 is an enlarged schematic view of Part E in FIG. 14. Figure 16: Schematic diagram of the operation of the present invention (six). FIG. 17 is an enlarged schematic view of part F in FIG. 16. Component number: Practice part: 1 0 ·· body 1 0 1: connection part 1 0 2: air inlet 1 1: buffer unit 1 1 1: slot 1 2: ventilation valve

Page 13 200536687 Brief description of the drawings 1 3: Actuating lever 13 1 3 2: Air channel 14 141: Air inlet 1 5 The present invention. Part: 2 0: Body 2 1 22: First chamber 22 23: Second chamber Chamber 23 2 4: Intake pipe 25 2 6: Valve chamber 2 7 2 8: Air passage 2 9 3 0: Check valve 40 4 1 ·· Sleeve 4 1 4 1 2: Perforated 4 1 4 1 4: Lower notch 42 4 2 1: Block 4 2 4 2 3: Airway 4 2 4 2 5: Ring groove 5 0 5 0 1: Large diameter end 50 5 0 3: Ring seat 5 0 6 0: Vent valve 60 602: First Outlet passage 60 6 0 4: Valve disc 7 0 7 0 1: Chamber 7 0 703: Intake pipe 70: Gas push shaft protection body knock

Handle P: First air chamber: Second air chamber Exhaust pipe airway _ Suction channel switch seat: Through hole: Upper cut groove Compression lever: Air passage: Airway buffer slide seat: Small diameter end: Side hole _: In Airway: Second airway Actuator: Impact head: Exhaust hole

Page 14 200536687 Simple illustration of the drawing 8 0: Fixing base 9 0: Connector 9 0 2: Spring 9 0 4: Knockout 8 0 1: Slotted hole 9 0 1: Pressure ring 9 0 3: Steel ball

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Claims (1)

200536687 VI. Scope of patent application1. A shock absorber for pneumatic tools, which mainly includes: Body: It has a handle and a chamber, and the handle is provided with an air inlet pipe connected to the air source and an exhaust gas connected to the outside. The air inlet and exhaust pipes are controlled by a switch seat, and the air inlet and exhaust are controlled by a switch seat. The chamber is provided with an air passage connected to the switch seat. The buffer slide seat is set in the cavity of the body and can be in the chamber. Sliding, a ring seat is set inside the ring seat, and a side hole communicating with the air passage is provided; a reversing valve is installed in the ring seat of the buffer slide seat to control the flow of gas; It is located in the ring seat of the buffer slide, and can be pushed by the gas to process the processed parts. By this, the buffer slide can be pushed and slid by the gas in the body cavity, and then in the cavity and the buffer slide. A closed air chamber is formed between the rear ends, and a pneumatic cushioning effect of a reaction force is provided when the actuation seat is actuated. 2. The damping device for pneumatic tools according to item 1 of the scope of the patent application, wherein the exhaust pipe on the body which can be controlled by the switch seat is controlled by the switch seat and communicates with the chamber through the airway; It can be controlled by the switch seat to release the pressure of the gas in the closed air chamber and close it before the actuating seat is operated to maintain the closed state of the air chamber. When the buffer slide backs to compress the air in the closed air chamber That is, a softer buffering effect is obtained with a smaller gas compression pressure. 3. The vibration damping device of the pneumatic tool according to item 1 of the scope of the patent application, wherein the cavity of the body is of a class shape, and has a first cavity and Page 16 200536687 VI. Patent application scope The second chamber, the buffer slide is correspondingly provided with a large diameter end and a small diameter end, the first chamber communicates with the airway, and a switch seat controls the air inlet pipe connected to the air source; Thereby, the buffer slide can be pushed and slid by the gas in the first chamber, and then the air passage is closed by the switch seat, thereby forming a closed air chamber between the first chamber and the buffer slide, and the buffer slide is adversely affected. When the force goes back, it provides a pneumatic cushioning effect of reaction force. 4 · The vibration damping device of the pneumatic tool according to item 1 of the scope of the patent application, wherein the cavity of the body is a class, and has a first cavity and a second cavity, and the buffer slide is correspondingly provided. The large-diameter end and the small-diameter end, the rear end of the second chamber is provided with an air suction channel communicating with the outside, and a non-return valve is provided at the air suction end; thereby, when the buffer slide is pushed against the slide in the body cavity, The chamber can use the suction pipe to suck the outside air to form a second air chamber. When the buffer slide moves backwards due to the reaction force, the check valve prevents the air from being discharged to the outside in the reverse direction, and provides another auxiliary pneumatic buffer. effect. 5 · The shock absorbing device of the pneumatic tool according to item 1 of the scope of the patent application, wherein the end of the body is screwed with a fixed seat with a slot on the side and a slotted hole to abut against the limit buffer slide in the body cavity. Slip. 6. The damping device for pneumatic tools according to item 1 of the scope of the patent application, wherein the actuating seat is provided with a chamber communicating with the ventilation valve, and a sliding impact head and a The knocking rod for machining the workpiece, the side wall of the actuating seat is additionally provided with an air inlet pipe communicating with the ventilation valve and the front end of the chamber, and an exhaust hole communicating with the outside. 7 · Vibration damping device for pneumatic tools according to item 6 of the scope of patent application, Page 17 200536687 6. The scope of the patent application Among them, a connector is installed at the front end of the actuating seat. The connector has a pressure ring, a spring and a steel ball, and the pressure ring can be pushed to shrink the steel ball for assembly or replacement. Actuate the knock rod in the chamber for the impact of the impact head, and then process the workpiece. Page 18