TWM517664U - Air supply structure of pneumatic tool - Google Patents

Description

Air supply structure of pneumatic tools

The present invention relates to a pneumatic tool, and more particularly to a gas supply structure of a pneumatic tool.

The pneumatic tool is a tool that uses the compressed air provided by the air compressor to drive the air motor to output the kinetic energy. It has the characteristics of quick movement, strong adaptability, and can be easily, explosive, heavy, wet and impact. It has been widely used in many fields such as modern machinery manufacturing, shipbuilding, automobile manufacturing, automobile repair, building decoration, stone processing, etc., with its advantages of non-polluting environment, long working life, simple structure and easy maintenance.

For example, the "pneumatic tool" of the Republic of China Patent Publication No. M457617 includes a casing, a driving mechanism and a gas control mechanism, the casing including an assembly space and an intake passage communicating with the assembly space, the driving mechanism, Mounted in the assembly space of the outer casing, and includes a cylinder block, and a forward rotation passage and a reverse passage communicating with the cylinder block, the gas control mechanism includes a gas passage installed in the outer casing and a control valve that is coupled to the cylinder block, and a control trigger that drives the control valve to rotate along a center of rotation, the control valve having a forward passage corresponding to the cylinder block and the opposite The air control channel of the transfer channel.

However, when the outer casing of the pneumatic tool is manufactured, the gas control passage is made by using a sand core mold, which is used to bury the gas in the gas passage when the outer shell is made, and then complete the outer shell. After the production, the sand buried in the position of the gas control passage is removed to form the gas control passage, and when the outer casing is made, it is easy to collapse due to the lack of control of the amount of sand or the strength of the sand core when the sand is buried. The gas control passage is not the same size or can not communicate with the crucible of the cylinder block, so that the production yield is reduced. Therefore, how to reduce the flaw of the gas control passage is an objective of the industry.

The main purpose of the novel is to solve the problem that the yield is lowered due to the fact that the amount of sand is not controlled when the sand is buried.

In order to achieve the above object, the present invention provides a gas supply structure for a pneumatic tool, comprising a housing and a ventilation module, the housing comprising an actuation portion, a connecting portion and a grip portion, the actuation portion having a gas chamber The connecting portion has an accommodating space, the accommodating portion has an air inlet passage and an exhaust passage, and the accommodating space communicates with the air chamber, the air inlet passage and the exhaust passage, and the venting module is disposed at The accommodating space of the connecting portion includes an air inlet communicating with the air inlet passage, an air outlet communicating with the air passage, a first air port communicating with the air chamber, and the air a second air port communicating with the chamber and a ventilation space communicating with the air inlet, the air outlet, the first air port, and the second air port.

In summary, since the ventilating module is disposed in the connecting portion, the venting module can be ensured in size and communicated with the intake passage and the exhaust passage instead of the conventional sand core mold. The air chamber improves the production yield.

The detailed description and technical content of this new model are described below with the following diagram:

Referring to FIG. 1 and FIG. 2, the present invention provides a gas supply structure for a pneumatic tool, comprising a housing 10 and a ventilation module 20, the housing 10 including an actuation portion 11 and a connection The portion 12 and the holding portion 13 have a plenum 111. The connecting portion 12 has an accommodating space 121. The accommodating portion 13 has an air inlet passage 131 and an exhaust passage 132. The space 121 is connected to the air chamber 111, the air inlet passage 131 and the exhaust passage 132. The material of the housing 10 is plastic steel, which is a composite material formed by using glass fiber and epoxy resin. The metal material used for casting is light in weight, convenient for the user to operate for a long time, and has the advantages of being hard and brittle, resistant to moisture, abrasion, deformation, acid and alkali resistance. The venting module 20 is disposed in the connecting portion 12 and includes an air inlet 21 communicating with the air inlet passage 131, an air outlet 22 communicating with the air passage 132, and a communicating with the air chamber 111. The first port 23, a second port 24 communicating with the air chamber 111, and a venting space 27 communicating with the air inlet 21, the exhaust port 22, the first port 23, and the second port 24.

The ventilating module 20 is firstly produced by the ventilating module 20, and after the manufacturing is completed, the venting module 20 is placed in a mold for manufacturing the casing 10, and plastic steel is injected to connect the venting module 20. In the accommodating space 121 of the connecting portion 12, the final solidification of the plastic steel can be completed, and the forming method of the plastic steel is injection molding. Instead of the traditional casting, a large amount of manpower is required to inject the high-temperature liquid metal into the mold, and Knock out the mold to get the finished product, to reduce the waste of manpower and inadvertently touch the high temperature liquid metal damage. By providing the ventilation module 20 in the connecting portion 12, the size of the ventilation space 27 of the ventilation module 20 and the ventilation module 20 and the intake passage 131 and the exhaust passage 132 can be ensured. The communication relationship of the air chamber 111.

In the embodiment, the venting module 20 includes a first component 201 and a second component 202 connected to the first component 201. The first component 201 includes the exhaust port 22 and the first air port 23 The second component 202 includes the air inlet 21 and the second air port 24. The ventilation module 20 is divided into the first component 201 and the second component 202, which can reduce the difficulty of manufacturing the ventilation module 20 and improve the process yield.

Referring to FIG. 3A and FIG. 3B, the new application further includes a piston 30, a first air valve 25, a second air valve 26, a construction component 40, a pressing member 50, and a Air pressure supply member 60. The air supply unit 60 is connected to the air inlet 131 away from the air inlet 21 to provide a gas pressure. The piston 30 is disposed in the operating portion 11 and includes a central shaft 31 and a piston piece for pushing the central shaft 31. 32. The diameter of the piston piece 32 is the same as that of the air chamber 111. The first air valve 25 and the second air valve 26 are disposed in the ventilation module 20. In a first state, the first air valve 25 is opened, and the second air valve 26 is closed to enable the first air port. 23 is in communication with the air inlet 21 and the air chamber 111, and the piston 30 is located at a feeding position; in a second state, the first air valve 25 is closed, and the second air valve 26 is opened, so that the The second port 24 communicates with the air inlet 21 and the air chamber 111, and the piston 30 is placed in a retracted position.

As shown in FIG. 3A, the pressing member 50 is coupled to the first air valve 25 and the second air valve 26, and when the pressing member 50 is in a relaxed position, the first air valve 25 and the second air valve The valve 26 forms the first state, the gas enters the venting module 20 via the air inlet 21, and the first air port 23 enters the air chamber 111, so that the piston 30 is located at the feeding position, as shown in FIG. 3B. As shown in the figure, when the pressing member 50 is in a pressing position, the first air valve 25 and the second air valve 26 form the second state, and the gas enters the venting module 20 via the air inlet 21, and then The air chamber 111 is moved in by the second port 24, and the piston 30 is pushed to the retracted position by the gas pressure of the gas.

The construction component 40 is coupled to the central shaft 31, and the piston 50 is alternately moved between the retracted position and the retracted position to move the piston 30 in the feeding position and the retracted position, thereby pushing the construction. Element 40 for construction.

In summary, the new model has the following characteristics:

After the ventilating module is completed and then disposed in the connecting portion, the venting space of the venting module can be ensured, and the venting module and the intake passage and the exhaust passage are The communication relationship of the air chamber.

2. By dividing the venting module into the first component and the second component, the manufacturing difficulty of the venting module can be reduced, and the process yield can be improved.

Third, the material of the shell is plastic steel. Compared with the metal material used in the conventional casting, the weight of the plastic steel is light, which is convenient for the user to operate for a long time, and has a hard and non-brittle, moisture-resistant, wear-resistant and non-deformable. Advantages such as acid and alkali resistance.

4. The molding method of the casing is injection molding. Compared with the conventional method of casting, it is necessary to use human to inject high-temperature liquid metal into the mold, and it is necessary to knock out the mold to obtain the finished product, thereby reducing the required use. The manpower, as well as the accidental injury caused by the inadvertent touch of high temperature liquid metal.

Therefore, this new type is highly progressive and meets the requirements for applying for a new type of patent. It is required to apply in accordance with the law, and the Bureau of Health will grant patents as soon as possible.

The present invention has been described in detail above, but the above is only a preferred embodiment of the present invention, and the scope of the present invention is not limited. That is, the equal changes and modifications made in accordance with the scope of this new application shall remain within the scope of the patent of this new type.

10‧‧‧shell
11‧‧‧Operation Department
111‧‧‧ air chamber
12‧‧‧Connecting Department
121‧‧‧ accommodating space
13‧‧‧ grip
131‧‧‧Intake passage
132‧‧‧Exhaust passage
20‧‧‧ventilation module
201‧‧‧First component
202‧‧‧second component
21‧‧‧Air inlet
22‧‧‧Exhaust port
23‧‧‧First port
24‧‧‧second port
25‧‧‧First air valve
26‧‧‧Second air valve
27‧‧‧ Ventilation space
30‧‧‧Piston
31‧‧‧ center axis
32‧‧‧Pneumatic blades
40‧‧‧ Construction components
50‧‧‧Pressing parts
60‧‧‧ pneumatic supply

1 is a cross-sectional view showing a gas supply structure according to a preferred embodiment of the present invention. 2 is a schematic view of a ventilation module according to a preferred embodiment of the present invention. 3A-3B are schematic diagrams of application operations of a preferred embodiment of the present invention.

10‧‧‧shell

11‧‧‧Operation Department

111‧‧‧ air chamber

12‧‧‧Connecting Department

121‧‧‧ accommodating space

13‧‧‧ grip

131‧‧‧Intake passage

132‧‧‧Exhaust passage

20‧‧‧ventilation module

201‧‧‧First component

202‧‧‧second component

21‧‧‧Air inlet

22‧‧‧Exhaust port

Claims (8)

An air supply structure for a pneumatic tool includes: a housing, an actuation portion, a connecting portion, and a grip portion, the actuating portion having a plenum having an accommodating space, the grip portion having An intake passage and an exhaust passage, the accommodation space is connected to the air chamber, the intake passage and the exhaust passage; and a ventilation module disposed in the connection portion includes a communication passage with the intake passage An air inlet, an exhaust port communicating with the exhaust passage, a first air port communicating with the air chamber, a second air port communicating with the air chamber, and an air inlet, the air outlet, The first air port and the second air port communicate with each other. The air supply structure of the pneumatic tool of claim 1, wherein the ventilation module comprises a first component and a second component connected to the first component, the first component comprising the exhaust port And the first port, the second component includes the air inlet and the second air port. The air supply structure of the pneumatic tool of claim 1, further comprising a piston disposed in the actuating portion, the piston comprising a central shaft and a piston piece for pushing the central shaft, the diameter of the piston piece Same as the air chamber. The air supply structure of the pneumatic tool of claim 3, further comprising a first air valve disposed in the ventilation module, and a second air valve disposed in the ventilation module, In a first state, the first air valve is opened, the second air valve is closed, the first air port is connected to the air inlet and the air chamber, and the piston is located at a feeding position, and a second In the state, the first air valve is closed, and the second air valve is opened, so that the second air port is in communication with the air inlet and the air chamber, and the piston is located in a retracted position. The air supply structure of the pneumatic tool of claim 4, further comprising a construction component coupled to the central shaft, the construction component operating as the piston moves in the feed position and the retracted position. The air supply structure of the pneumatic tool of claim 4, further comprising a pressing member connected to the first air valve and the second air valve, when the pressing member is in a relaxed position, the first An air valve and the second air valve form the first state, and the first air valve and the second air valve form the second state when the pressing member is in a pressing position. The air supply structure of the pneumatic tool of claim 1, further comprising a gas pressure supply member communicating with the air inlet passage away from the air inlet. The air supply structure of the pneumatic tool according to claim 1, wherein the casing is made of plastic steel.