TWI746323B - Pneumatic percussion device and its actuation method - Google Patents

Abstract

A pneumatic percussion device comprising an air storage cavity with a first air inlet and a guide channel, the first air inlet is located on the wall of the air storage cavity and connected to the guide channel; the actuation cavity has a through Hole, the air storage cavity and the actuating cavity are communicated with a second air inlet; the movable plug body has a plug body and an annular elastic side edge, the annular elastic side edge movably abuts the wall surface of the guide channel, and the plug body is arranged at Between the first air inlet and the second air inlet, the annular elastic side edge gradually expands from the first air inlet to the second air inlet; the movable percussion body has a percussion body and a percussion head. The inner wall surface of the actuating cavity moves, and the percussion head reciprocates in the actuating cavity and outside the through hole; the return element is arranged in the actuating cavity, and the returning element pushes the movable percussion body to return the percussion head to the actuating cavity.

Description

Pneumatic percussion device and its actuation method

The present invention provides a pneumatic percussion device and an actuation method thereof, especially one that does not require a magnetic body but can have a stable percussion force.

The traditional pneumatic percussion device (such as the air hammer of the Republic of China Patent No. 549202) when the air pressure source is turned on, the air pressure source transmits the pressurized air through the pipeline to the air storage cavity of the air hammer at atmospheric pressure due to the pressure difference, and the magnetic sheet The magnetic attraction force between the magnetizing hammer head and the percussion cavity allows the air pressure to be extremely low without causing the magnetic hammer head to move just because the air pressure is greater than the elastic force of the return spring in the percussion cavity, which leads to percussion The force cannot reach the expected impact strength. Magnetic attraction can increase the air pressure in the air storage chamber until the instantaneous pressure of the pressurized air sent to the air storage chamber via the pipeline is greater than the sum of the elastic force of the return spring and the magnetic attraction, the force of the pressurized air is enough to push the knock Hit the magnetizing hammer head in the cavity to make the magnetizing hammer head move instantaneously to compress the return spring and hit the object to be struck to achieve the effect of percussion. Expressed by the mechanical formula, the lowest driving percussion force can be expressed as Fiknock = Fispring + Fimagnic, where the deformation of the return spring is the smallest before the magnetizing hammer head is moved, and the magnetic force is the largest at the same time, so the lowest driving percussion force is mainly to overcome the magnetic force Once the gas pressure is greater than the minimum driving percussion force, the magnetizing hammer head separates from the magnet and moves. Since the magnetic force is inversely proportional to the square of the distance, the subsequent instantaneous percussion force can be expressed as ΔFknock = Fiknock-(ΔFspring + ΔFmagnic). After the magnetizing hammer is struck, but the pressure source of the pressurized air is not cut off, because the air storage cavity and the percussion cavity are still pressurized, the force exerted by the pressurized air must be greater than the initial elastic force of the return spring Therefore, the reset spring cannot reset the magnetizing hammer head until the pressure of the air storage cavity is less than the elastic force of the spring. At this time, the air source continues to provide pressurized air, and the pressurized air will follow the non-airtight magnetizing hammer head. The gap between the cavity and the cavity wall leaks out. This continuous pressurization will cause air loss until the pressurized air pressure source is cut off; in addition, the size and number of holes in the air passage between the air storage cavity and the percussion cavity are also It will affect the percussion force. Under the same minimum drive percussion force, the larger the hole or the more holes, the larger the unit area that can accept the pressurized air pressure, and the easier it is to break through the minimum drive percussion force and strike. It means that the pressure of the pressurized air can make the magnetizing hammer head strike at a low level. However, the low pressure of the pressurized air means that the strength of the striking force is weakened; on the contrary, if the hole is smaller, it means that the hammer is increased. The compressed air pressure must be higher to achieve the lowest driving percussion force. The percussion force can be increased theoretically due to the increase in the pressurized air pressure. However, the small hole limits the subsequent pressurized air replenishment and greatly reduces Actual percussion power. In terms of switching operation, the pipeline connected to the air storage chamber can use a three-port two-position directional valve to switch between the air pressure in the air storage chamber and the atmospheric pressure or the pressurized air pressure source. When the pressurized air pressure is cut off When the channel between the source and the air storage cavity is converted to the air storage cavity and connected to the atmospheric pressure, the pressure in the air storage cavity drops to one atmospheric pressure, and the return spring returns the magnetizing hammer head. This is a complete percussion cycle until the three ports are switched The two-position directional valve connects the air storage chamber with the air pressure source pipeline for knocking. If you want to increase the percussion force, you need to increase the pressure of the air pressure source. However, since the two actions of applying air pressure and percussion are performed at the same time, as mentioned above, the minimum driving percussion force is a certain value. The impact of the percussion force can only be changed by the continuous applied air pressure when the minimum driving percussion force is exceeded. The pipe diameter of the pipeline that transmits pressurized air will affect the amount of air transmitted per unit time. The pipe diameter is small or The long pipeline will slow down the transmission speed of the pressurized air. As long as the air pressure in the air storage chamber is greater than the minimum percussion force, the magnetizing hammer will be pushed to move and percussion. The pressure of the source rises, but the higher air pressure cannot fill the air storage chamber before the magnetizing hammer moves, and the pipeline limits the speed of air transmission, and the pressure rise in the air storage chamber is not fast enough to reduce the rise. Under these conditions, the inner diameter of the pipeline must be enlarged, and the air source path should not be too long to avoid reducing the transfer speed of the pressurization.

Therefore, the traditional pneumatic percussion device has disadvantages such as the following: the diameter of the air source pipe requires subsequent air supplementation during percussion, which affects the impact force. The piping cannot be too long, and the air pressure source switch cannot be too far. The amount of gas source gas used is large. The impact of pressure on the strength of the impact is diminishing. The magnetic attraction of the magnet will reduce the impact force. The minimum operating pressure of the magnet is pulled up. The time of tapping is uncertain.

The inventor then exhausted his mind to study carefully, and then developed a pneumatic percussion device and its operating method, in order to achieve the purpose of having a stable percussion force without the need for a magnetic body.

The first aspect of the present invention provides a pneumatic percussion device, which includes an air storage cavity with a first air inlet and a guide channel, the first air inlet is located in the air storage cavity On the wall and connected with the guiding channel; an actuating cavity with a through hole; the air storage cavity and the actuating cavity are communicated with a second air inlet; a movable plug body having a plug Body and an annular elastic side edge, the annular elastic side edge is connected with the peripheral edge of the plug body to move against the wall surface of the guide channel, the plug body is arranged between the first air inlet hole and the second air inlet hole , The ring-shaped elastic side edge gradually expands from the first air inlet to the second air inlet; a movable percussive body, which has a percussive body and a percussive head, the percussive body is connected to the percussive head and Moving along the inner wall of the actuating cavity, the percussion head reciprocates in the actuating cavity and outside the through hole; and a reset element, which is arranged in the actuating cavity, and the reset element pushes the movable percussion body to make The percussion head returns to the actuation cavity.

In one embodiment, the guide channel is located in the wall of the air storage cavity, a second air inlet pipe is arranged in the air storage cavity to connect to the second air inlet, and the movable plug body slides on the first air inlet. Between the air inlet hole and the free end of the second air inlet pipe.

In one embodiment, a connecting pipe and a second air inlet pipe are provided in the air storage cavity, the length of the second air inlet pipe is less than the length of the connecting pipe, and the connecting pipe is connected to the first air inlet and Between the second air inlets, the second air inlet pipe is connected to the second air inlet and is located in the connecting pipe, the inner wall of the connecting pipe is the guide passage, and the movable plug body is located in the guide passage Inside and sliding between the first air inlet hole and the free end of the second air inlet pipe, the connecting pipe has a communicating hole to be located between the movable plug body and the second air inlet hole.

In one embodiment, a first air inlet pipe is provided in the guide channel, the first air inlet pipe is connected to the first air inlet hole, and the movable plug body slides on the free end of the first air inlet pipe and the In the guide passage between the free ends of the second intake pipe.

In one embodiment, the air storage cavity is provided with a connecting pipe and a second air inlet pipe, the pipe diameter of the connecting pipe is larger than the pipe diameter of the second air inlet pipe, and the connecting pipe is connected to the first air inlet hole The inner wall of the connecting pipe is the guide passage, and the movable plug body is located in the guide passage and slides between the first air inlet hole and the free end of the second air inlet pipe.

In one embodiment, the movable plug body has an extended plug body to connect to the plug body, the plug body faces the first air inlet hole, and the extended plug body faces the second air inlet hole.

In one embodiment, the gas storage cavity is connected to an expansion gas storage cavity.

In one embodiment, the actuating cavity has a vent hole, and the vent hole is located between the percussion body and the through hole.

In one embodiment, the inner wall surface of the actuating cavity has a circular ring shape.

In one embodiment, the gas storage cavity is composed of a gas storage cover, a gas storage and a partition, and the actuation cavity is composed of an actuation cover, an actuation body and the partition.

In one embodiment, the gas storage, the partition and the actuating body are integrally formed.

In one embodiment, the resetting element is a spring, and two ends of the resetting element respectively press against the bottom surface of the inner wall surface of the movable percussion body and the actuating cavity.

The second aspect of the present invention provides an actuation method of the above-mentioned pneumatic percussion device, which includes the following steps: (1) Provide pressurized air to the air storage cavity, so that the movable plug body cover presses the second (2) cut off the pressurized air, so that the movable plug body cover presses the first air inlet and opens the second air inlet, thereby allowing the pressurized air in the air storage cavity to enter The actuating cavity pushes the movable percussion body to percussion, and causes the movable percussion body to compress the resetting element; The gap between the movable percussion body and the inner wall surface of the actuating cavity and the through hole are discharged, and the reset element returns to the movable percussion body.

Thereby, the pneumatic percussion device and its actuation method of the present invention do not need a magnetic body and can have a stable percussion force.

In order to fully understand the purpose, features, and effects of the present invention, the following specific embodiments are used in conjunction with the accompanying drawings to give a detailed description of the present invention. The description is as follows:

As shown in FIGS. 1 to 4, the first aspect of the present invention provides a pneumatic percussion device, which includes an air storage cavity 1, an actuation cavity 2, a movable plug body 3, and a movable percussion body 4 and a reset component 5. The gas storage cavity 1 has a gas storage cover 15, a gas storage 16, a first air inlet 11 and a guide channel 12. The gas storage cover 15 is disposed on the top of the gas storage 16, and the second An air inlet 11 and the guide passage 12 are provided on the air storage cover 15 (the wall of the air storage cavity 1), and the first air inlet 11 is connected to the guide passage 12 to enable an air pressure source ( (Not shown) gas enters the gas storage cavity 1. The actuating cavity 2 has an actuating cover 25, an actuating body 26, and a through hole 21. The actuating body 26 and its inner wall surface may be in a circular ring shape. The actuating cover 25 is disposed at the bottom of the actuating body 26. The through hole 21 is provided in the actuating cover 25. A partition 6 may be provided between the bottom of the gas storage 16 of the gas storage chamber 1 and the top of the actuating body 26 of the actuating chamber 2, and the partition 6 may have A second air inlet 61 is connected to the gas storage cavity 1 and the actuation cavity 2. The internal space formed by the gas storage cavity 1, the gas storage cover 15 and the partition 6 can be made of rubber O Materials such as shaped rings or adhesives make the components in an airtight state, so that the air in the air storage cavity 1 can only enter and exit through the first air inlet 11 or the second air inlet 61. The gas in the gas storage chamber 1 can enter the actuation chamber 2 through the second air inlet 61, the gas storage cover 15, the gas storage 16, the partition 6, the actuation body 26, and the actuation cover The body 25 can be fixed by bonding, screwing, locking, or casting. In addition, the gas storage chamber 1 may be composed of the gas storage cover 15, the gas storage 16 and the partition 6, and the actuation chamber 2 may be composed of the actuation cover 25, the actuation body 26, and the partition 6. The gas storage 16, the partition body 6, and the actuating body 26 can be fixed by bonding, screwing, locking, or casting as an integral form. The movable plug body 3 has a plug body 31 and an annular elastic side edge 32. The annular elastic side edge 32 is connected to the periphery of the plug body 31 to move against the wall surface of the guide channel 12, and the wall surface of the guide channel 12 It is a ring-shaped structure, and the diameter of the ring-shaped structure of the guide channel 12 is equal to or slightly smaller than the diameter of the ring-shaped elastic side edge 32 to ensure that the ring-shaped elastic side edge 32 can form an airtight with the guide channel 12, which is effective Because of the pressure difference, the movable plug body 3 can smoothly slide in the guide channel 12, and because the air pressure is stored as a pre-storage mechanism, the diameter of the air pressure source can also be reduced. The diameter of the ring structure of the guide channel 12 There is no need to consider the air pressure supply rate, and the annular elastic side edge 32 does not need to be too large to avoid the risk of airtight leakage caused by an excessively large airtight surface. Therefore, the diameter of the guide channel 12 can be much smaller than the inner width of the air storage cavity 1; The diameter of the plug body 31 must be able to airtightly cover the air hole, and only one side needs to be larger than the first air inlet 11 (or the air hole of the connecting pipe 7 as shown in FIG. 5) and the other side is larger than the second air inlet. The hole 61 (or the air hole of the second air inlet pipe 8 as shown in FIG. 3) is sufficient. The plug body 31 and the annular elastic side edge 32 can be integrally formed, and the material of the movable plug body 3 can be selected from silicone or natural rubber. Rubber, fluorine rubber (viton), nitrile rubber (nbr) and other materials with good elasticity and airtightness advantages, the plug body 31 is arranged in the first air inlet 11 and the second air inlet Between the holes 61, the plug body 31 can temporarily plug the first air inlet 11 or the second air inlet 61, and the annular elastic side edge 32 faces the second air inlet 11 from the first air inlet 11 61 is gradually expanded to make the movable plug body 3 in an umbrella shape, and the annular elastic side edge 32 gradually becomes thinner from the thickness near the center of the circle to the edge to improve the elasticity and softness of the edge, ensuring that one side can breathe while the other side Can be sealed. The movable percussion body 4 has a percussion body 41 and a percussion head 42. The percussion body 41 is connected to the percussion head 42 and reciprocates along the inner wall of the actuating cavity 2. The percussion head 42 reciprocates Inside the actuating cavity 2 and outside the through hole 21, the gas below the percussion body 41 can flow through the through hole 21 so that the movable percussion body 4 can reciprocate. In addition, the percussion body 41 can be sheathed with at least one guide ring body 43. The guide ring body 43 is a wear-resistant ring, or referred to as a guide ring. , Heat resistance and other properties such as phenolic resin, fiber cloth or glass fiber cloth and other materials, can support the metal material of the percussion body 41 to avoid direct friction with the actuation ring body 26 of the same metal material, the percussion body 41 can The guide ring body 43 moves along the inner wall surface of the actuating cavity 2 to reduce friction and improve mobility. The guide ring body 43 may also have a cutout 431 as a buffer space and improve exhaust efficiency. The restoring element 5 can be a coil spring, the restoring element 5 is arranged in the actuating cavity 2, and the two ends of the restoring element 5 respectively abut against the percussion body 41 of the movable percussion body 4 and the actuation cover body 25, The percussion head 42 of the movable percussion body 4 can pass through the return element 5, and the return element 5 can push the movable percussion body 4 to return the percussion head 42 to the actuation cavity 2. In addition, the reset element 5 can be a pneumatic pressure hole, and the pneumatic percussion device of the present invention can pressurize the air pressure to the bottom of the percussion body 41 through the pneumatic pressure hole to reset the percussion body 41, or by The air pressure is released from the air pressure hole to allow the striking body 41 to strike.

As described above, the second aspect of the present invention provides the above-mentioned actuation method of the pneumatic percussion device, which includes the following steps. The gas storage cavity 1 is at atmospheric pressure and airtight, and the gas storage cavity 1 is pressurized until the inside thereof and the air pressure source reach equal pressure. The second air inlet 61 between the air storage cavity 1 and the actuating cavity 2 uses the movable plug body 3 to control the airtightness of the second air inlet 61, as shown in FIG. 3, when the After compressed air enters the air storage cavity 1 through the space between the annular elastic side edge 32 of the movable plug body 3 and the wall surface of the guide channel 12, the movable plug body 3 is pressurized by the air storage cavity 1. The pressure difference between the compressed air and the atmospheric pressure of the actuating cavity 2 causes the movable plug body 3 to cover the second air inlet 61, thereby causing the air storage cavity 1 and the actuating cavity 2 to be two There is no communication between them and a pressure difference is formed. At this time, the movable percussion body 4 does not act, and no air pressure enters the actuation cavity 2, so the movable percussion body 4 does not need to have magnetism to prevent air pressure from causing movement The striking body 4 moves. When the movable percussion body 4 is to perform a percussion action, the pipeline connected to the first air inlet 11 of the air storage chamber 1 can use a three-port two-position directional valve to change the air pressure in the air storage chamber 1 to the same Switch between atmospheric pressure or pressurized air pressure source. As shown in Figure 4, when the passage between the pressurized air pressure source and the air storage chamber 1 is cut off and the air storage chamber 1 is connected to atmospheric pressure, and when the pipeline pressure drops to one atmospheric pressure, the When the pressure of the air storage chamber 1 is the originally pressurized pressure, the movable plug 3 between the pipeline and the air storage chamber 1 is affected by the pressure between the pressurized air of the air storage chamber 1 and the atmospheric pressure of the pipeline. The pressure difference causes the movable plug body 3 to cover the first air inlet 11 between the gas storage cavity 1 and the pipeline, and the movable plug body 3 simultaneously opens the space between the gas storage cavity 1 and the actuation cavity 2 Once the second air inlet 61 is opened, the high-pressure air of the air storage cavity 1 will instantly enter the lower pressure actuation cavity 2 through the second air inlet 61, The movable percussion body 4 is pushed by the instantaneous pressure to compress the return element 5 and move to complete the percussion action. Wherein, the percussion body 41 of the movable percussion body 4 and the inner wall surface of the actuation cavity 2 are not completely airtight, and the actuation body 26 is provided with a vent hole 22, and the vent hole 22 is located in the percussion body. Between 41 and the through hole 21, when a percussion action is performed, the gas in the lower part of the movable percussion body 4 in the actuation cavity 2 and the high-pressure air in the actuation cavity 1 after the percussion action is completed can be Through the gap between the striking body 41 and the inner wall surface of the actuating cavity 2 and the vent hole 22, it is gradually discharged. When the pressure on the upper part of the movable percussion body 4 in the actuation cavity 2 is less than the return elastic force of the return element 5, the return element 5 can complete the return of the movable percussion body 4, which is a complete percussion cycle , Until the three-port and two-position directional valve is switched, the air storage chamber 1 is connected to the pipeline of the air pressure source for the next tap.

In addition, between the pipeline of the pneumatic percussion device of the present invention and the gas storage cavity 1, and between the gas storage cavity 1 and the actuation cavity 2, there is the movable plug body 3, and the movable plug body 3 can be regarded as a reverse Check valve or directional valve. The movable plug body 3 can also be two movable plug bodies that are linked, that is, when high-pressure air is taken in, the movable plug body between the pipeline and the air storage cavity 1 opens the passage between the two, and the storage The movable plug body between the air cavity 1 and the actuating cavity 2 closes the passage between the two, and vice versa, but the movable plug body 3 can also be designed and integrated into a single movable plug body. In terms of the mechanism for controlling the action of the movable plug body 3, the air pressure difference is used as the actuation source and the structure of the movable plug body 3 is used as direction control. The movable plug body 3 can be a one-way channel valve. When the pneumatic percussion device of the present invention is to store air, when one side of the movable plug body 3 receives the air pressure transmitted by the pipeline, the pressurized air can enter the movable plug body through the annular elastic side edge 32 of the movable plug body 3 On the other side of 3, at this time, the second air inlet 61 is covered by the plug body 31 of the movable plug body 3 due to the air pressure of the pipeline to be airtight until the surface of the movable plug body 3 and the annular elastic side edge 32 Below are all high-pressure gas reaching equilibrium, and the second air inlet 61 is still at atmospheric pressure due to the cover pressure and airtight. This is the gas storage action of the gas storage chamber 1. When the pneumatic percussion device of the present invention is to actuate percussion, when the surface of the movable plug body 3 receives the reduced pressure of the pipeline from high pressure to atmospheric pressure, it forms pressure with the high pressure gas on the other side of the movable plug body 3. The pressure difference pushes the annular elastic side edge 32 and pushes the annular elastic side edge 32 against the wall surface of the guide channel 12 to move the movable plug body 3 and make the plug body 31 cover the first air inlet Hole 11, and the second air inlet 61 is opened at the same time. At this time, the high-pressure gas originally in the gas storage cavity 1 flows to the second air inlet 61 due to the pressure difference, and from the second air inlet 61 The high-pressure gas flowing into the actuating cavity 2 instantly pushes the movable percussion body 4 to move to achieve the purpose of percussion. It can be seen from the above that when the gas storage cavity 1 is in communication with the air pressure source, the actuation cavity 2 does not act. When the gas storage cavity 1 is in communication with the actuation cavity 2, the high-pressure gas in the gas storage cavity 1 enters the actuation cavity 2 to cause the movable percussion body 4 to move and strike.

As shown in Figures 1 to 4, in one embodiment, the first air inlet 11 is located on the air storage cover 15 of the air storage cavity 1, and the guide channel 12 is located on the air storage cavity 1 In the air storage cover 15, a second air inlet pipe 8 is provided in the air storage cavity 1 to connect to the second air inlet 61, and the movable plug body 3 slides on the first air inlet 11 and the second air inlet 11 and the second air inlet. Between the openings of the free end of the air inlet pipe 8, the plug body 31 can temporarily plug the opening of the free end of the first air inlet hole 11 or the second air inlet pipe 8 (which communicates with the second air inlet hole 61), The end of the guiding channel 12 connected to the first air inlet 11 can be retracted to stop the plug body 31 and allow the plug body 31 to temporarily plug the first air inlet hole 11. Thereby, the movable plug body 3 can quickly switch positions between the first air inlet 11 and the opening of the free end of the second air inlet pipe 8 (which communicates with the second air inlet) to enhance the movable knock The frequency of hitting body 4. In addition, the gas storage 16, the second intake pipe 8, the partition body 6, and the actuating body 26 can be integrally formed by casting.

As shown in FIG. 5, in an embodiment, the first air inlet 11 is located on the gas storage cover 15 of the gas storage cavity 1, and the gas storage cavity 1 is provided with a connecting pipe 7 and a second Intake pipe 8, the length of the second intake pipe 8 is less than the length of the connecting pipe 7, the pipe diameter of the connecting pipe 7 is greater than the pipe diameter of the second intake pipe 8, the connecting pipe 7 is connected to the first Between the air inlet 11 and the second air inlet 61, the diameter of the connecting pipe 7 is larger than that of the first air inlet 11 and the second air inlet 61, and the guide passage 12 is located in the connecting pipe 7, The second air inlet pipe 8 is connected to the second air inlet hole 61 and is located in the guide passage 12, and the free end portion of the second air inlet pipe 8 is located in the free end of the connecting pipe 7 so that the movable plug The body 3 can fix the sliding range. The movable plug body 3 is located in the guide channel 12 and slides between the first air inlet hole 11 and the opening of the free end of the second air inlet pipe 8, and the plug body 31 can Temporarily plug the opening of the free end of the first air inlet hole 11 or the second air inlet pipe 8 (which communicates with the second air inlet hole 61), and the connecting pipe 7 has a communicating hole 71 to be located in the movable plug body 3. Between the second air inlet hole 61 and the second air inlet hole 61, gas can flow between the inside of the connecting pipe 7 and the outside of the connecting pipe 7 through the communicating hole 71. Thereby, the gas storage cover 15 can be easily manufactured, and the movable plug body 3 can be easily assembled in the gas storage cavity 1 without falling from the gas storage cover 15; the connecting pipe 7 can also be Set under the gas storage cover 15 or be an extension of the gas storage cover 15, the length of the connecting pipe 7 only needs to be sufficient for the movable plug body 3 to slide between the first air inlet 11 and the Between the openings of the free end of the second intake pipe 8. In addition, as shown in FIG. 6, in the above embodiment, a first air inlet pipe 72 is provided in the guide passage 12, and the first air inlet pipe 72 is connected to the first air inlet hole 11, and the plug body 31 is movable Between the opening of the free end of the first air inlet pipe 72 and the opening of the free end of the second air inlet pipe 8, the plug body 31 can temporarily plug the opening of the free end of the first air inlet pipe 72 (which communicates with the The first air inlet 11) or the opening of the free end of the second air inlet pipe 8 (which communicates with the second air inlet 61). That is, the movable plug body 3 can be placed in any position of the air storage cavity 1 as long as it can achieve the function of switching and opening the passage between the first air inlet 11 and the second air inlet 61.

As shown in FIG. 7, in one embodiment, the movable plug body 3 has an extended plug body 33 to connect the plug body 31, the plug body 31 faces the first air inlet 11, and the extended plug body 33 faces the The second air inlet 61, the movable plug body 3 is movable between the first air inlet 11 and the second air inlet 61, the annular elastic side edge 32 slides in the guide channel 12, the plug body 31 can temporarily plug the first air inlet 11, and the extended plug body 33 can temporarily plug the second air inlet 61. Thereby, the movable plug body 3 can quickly switch positions between the first air inlet 11 and the second air inlet 61. In addition, the gas storage 16 of the gas storage cavity 1 can be integrally formed with the actuating body 26 of the actuating chamber 2 and the partition 6 by casting, and then sealed with the gas storage cover 15 and the actuating cover 25 To simplify the structure of the pneumatic percussion device of the present invention.

As shown in FIG. 8, in an embodiment, the first air inlet 11 is located on the air storage cover 15 of the air storage cavity 1, the guide channel 12 is located in the air storage cavity 1, and the guide A second air inlet pipe 8 is provided in the guide passage 12 to connect to the second air inlet hole 61, and the plug body 31 is movable on the first air inlet hole 11 and the opening of the free end of the second air inlet pipe 8 (which communicates with each other). Between the second air inlet holes 61), the plug body 31 can temporarily plug the opening of the free end of the first air inlet hole 11 or the second air inlet pipe 8 (which communicates with the second air inlet hole 61), The gas storage cavity 1 is connected with an expansion gas storage cavity 13 between the movable plug body 3 and the second air inlet 61. Thereby, the pneumatic percussion device of the present invention can increase the gas storage capacity through the expansion gas storage cavity 13, and the expansion gas storage cavity 13 can be set in other required positions.

The present invention has been disclosed in a preferred embodiment above, but those skilled in the art should understand that the embodiment is only used to describe the present invention and should not be construed as limiting the scope of the present invention. It should be noted that all changes and substitutions equivalent to this embodiment should be included in the scope of the present invention. Therefore, the protection scope of the present invention should be defined by the scope of the patent application.

1: Air storage cavity 11: The first air inlet 12: Guidance channel 13: Expansion of the gas storage cavity 15: Gas storage cover 16: gas storage 2: Actuating cavity 21: Through hole 22: Vent 25: Actuating cover 26: Actuator 3: active plug body 31: plug body 32: Ring elastic side edge 33: Extension plug body 4: Active percussion body 41: Percussion 42: Knock the head 43: guide ring body 431: cut 5: Reset components 6: Separator 61: second air inlet 7: connecting pipe 71: Connecting hole 72: The first intake pipe 8: The second intake pipe

[Figure 1] is an exploded schematic diagram of the pneumatic percussion device of a specific embodiment of the present invention. [Figure 2] is a schematic diagram of the combination of a pneumatic percussion device in a specific embodiment of the present invention. [Figure 3] is a schematic diagram of the actuation of the air intake of the pneumatic percussion device in a specific embodiment of the present invention. [Figure 4] is a schematic diagram of the pneumatic percussion device in the specific embodiment of the present invention. [Figure 5] is a schematic cross-sectional view of a pneumatic percussion device according to a specific embodiment of the present invention. [Figure 6] is the second cross-sectional schematic diagram of the pneumatic percussion device of the specific embodiment of the present invention. [Figure 7] is the third schematic cross-sectional view of the pneumatic percussion device of the specific embodiment of the present invention. [Figure 8] is the fourth schematic cross-sectional view of the pneumatic percussion device of the specific embodiment of the present invention.

1: Air storage cavity

11: The first air inlet

12: Guidance channel

15: Gas storage cover

16: gas storage

2: Actuating cavity

21: Through hole

22: Vent

25: Actuating cover

26: Actuator

3: active plug body

31: plug body

32: Ring elastic side edge

4: Active percussion body

41: Percussion

42: Knock the head

43: guide ring body

431: cut

5: Reset components

6: Separator

61: second air inlet

8: The second intake pipe

Claims (13)

A pneumatic percussion device, which comprises: An air storage cavity with a first air inlet and a guide channel, the first air inlet is located on the wall of the air storage cavity and connected to the guide channel; An actuating cavity with a through hole, and a second air inlet is communicated between the air storage cavity and the actuating cavity; A movable plug body having a plug body and an annular elastic side edge, the annular elastic side edge is connected to the peripheral edge of the plug body to movably abut against the wall surface of the guide channel, and the plug body is arranged in the first air inlet hole And the second air inlet, the annular elastic side edge gradually expands from the first air inlet to the second air inlet; A movable percussion body, which has a percussion body and a percussion head, the percussion body is connected to the percussion head and moves along the inner wall of the actuation cavity, and the percussion head reciprocates in the actuation cavity and Outside the through hole; and A return element is arranged in the actuation cavity, and the return element pushes the movable percussion body to return the percussion head to the actuation cavity. The pneumatic percussion device according to claim 1, wherein the guide channel is located in the wall of the air storage cavity, and a second air inlet pipe is arranged in the air storage cavity to connect to the second air inlet, and the movable The plug body slides between the first air inlet hole and the free end of the second air inlet pipe. The pneumatic percussion device according to claim 1, wherein a connecting pipe and a second air inlet pipe are arranged in the air storage cavity, the length of the second air inlet pipe is less than the length of the connecting pipe, and the connecting pipe is connected to Between the first air inlet hole and the second air inlet hole, the second air inlet pipe is connected to the second air inlet hole and is located in the connecting pipe, the inner wall of the connecting pipe is the guide passage, and the movable The plug body is located in the guide channel and slid between the first air inlet hole and the free end of the second air inlet pipe, and the connecting pipe has a communicating hole to be located between the movable plug body and the second air inlet pipe Between holes. The pneumatic percussion device according to claim 3, wherein a first air inlet pipe is provided in the guide passage, the first air inlet pipe is connected to the first air inlet hole, and the movable plug body slides on the first inlet In the guide channel between the free end of the air pipe and the free end of the second air inlet pipe. The pneumatic percussion device according to claim 1, wherein a connecting pipe and a second air inlet pipe are arranged in the air storage cavity, the pipe diameter of the connecting pipe is larger than the pipe diameter of the second air inlet pipe, and the connecting pipe Connecting to the first air inlet, the inner wall of the connecting pipe is the guide channel, and the movable plug body is located in the guide channel and slides between the free ends of the first air inlet and the second air inlet pipe between. The pneumatic percussion device according to claim 1, wherein the movable plug body has an extended plug body to connect to the plug body, the plug body faces the first air inlet hole, and the extended plug body faces the second air inlet hole . The pneumatic percussion device according to claim 1, wherein the gas storage cavity is connected to an expansion gas storage cavity. The pneumatic percussion device according to claim 1, wherein the actuating cavity has a vent hole, and the vent hole is located between the percussion body and the through hole. The pneumatic percussion device according to claim 1, wherein the inner wall surface of the actuating cavity has a circular ring shape. The pneumatic percussion device according to claim 1, wherein the gas storage cavity is composed of a gas storage cover, a gas storage and a partition, and the actuation cavity is composed of an actuation cover, an actuation body and the partition Body composition. The pneumatic percussion device according to claim 10, wherein the gas storage, the partition and the actuating body are integrally formed. The pneumatic percussion device according to claim 1, wherein the return element is a spring, and two ends of the return element respectively press against the bottom surface of the movable percussion body and the inner wall surface of the actuating cavity. A method for operating a pneumatic percussion device according to any one of claims 1 to 12, which comprises the following steps: (1) Provide pressurized air to the air storage cavity, so that the movable plug body cover presses the second air inlet hole; (2) Cut off the pressurized air so that the movable plug body cover presses the first air inlet and opens the second air inlet, so that the pressurized air in the air storage cavity enters the actuation cavity Pushing the movable percussion body to percussion, and causing the movable percussion body to compress the return element; and (3) The resetting element resets and pushes the movable percussion body so that the pressurized air in the actuation cavity is discharged through the gap between the movable percussion body and the inner wall surface of the actuation cavity and the through hole, the resetting element Return to the active percussion body.

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