CN212601673U - Pneumatic tool - Google Patents

Abstract

The utility model discloses a pneumatic tool, include: a tool body; and a cylinder structure, it locates this tool main part, this cylinder structure includes a cylinder body and a runner mechanism, this cylinder body includes an air chamber, this runner mechanism locates this cylinder body, this runner mechanism includes two first air inlets and two exhaust portions, this air chamber of these two first air inlets intercommunication, these two exhaust portions supply respectively to communicate this external world and this air chamber, each this first air inlet includes an axial runner of axial extension and a radial blind hole that radially extends and switches on this axial runner, this axial runner includes the open axial opening of at least one axial, this radial blind hole includes the open radial opening of a radial, this radial opening corresponds and communicates this first air inlet. The utility model discloses can provide short advance, exhaust route and output is high and long service life.

Description

Pneumatic tool

Technical Field

The present invention relates to a pneumatic tool.

Background

The pneumatic tool is one of the assembling tools commonly used in the factory, which is used to screw or unscrew fastening components such as nuts and bolts, and is popular among many workers. The main reasons for this are that the high-pressure gas used as the power source is easily available, does not pollute the environment, and has high stability and safety.

A conventional pneumatic tool includes a rotating mechanism and a housing, the housing includes a front housing and a rear housing, the rear housing accommodates the rotating mechanism, and an air inlet channel is disposed at a rear end of the rear housing, the rotating mechanism includes a cylinder and a rotating mechanism accommodated in the cylinder, the cylinder has an air inlet channel, the air inlet channel communicates with an interior of the cylinder and the air inlet channel of the rear housing, however, the air inlet channel of the cylinder radially penetrates through a wall surface of the cylinder, such as taiwan patent No. TW287457, and gas directly flows into the cylinder to push the rotating mechanism, which results in excessive gas pressure and large single-side deflection of a rotor, and is easy to be lost.

Therefore, there is a need for a new and improved pneumatic tool to solve the above problems.

SUMMERY OF THE UTILITY MODEL

A primary object of the present invention is to provide a pneumatic tool that provides a short inlet and outlet path and has a high output and a long service life.

To achieve the above object, the present invention provides a pneumatic tool, including: the tool main body comprises an air supply part connected with an external air source, an accommodating space, a first air inlet channel and an exhaust channel, wherein the first air inlet channel is communicated with the air supply part, and the exhaust channel is communicated with the outside; the cylinder structure comprises a cylinder body and a flow channel mechanism, the cylinder body comprises an air chamber, the flow channel mechanism is arranged in the cylinder body, the flow channel mechanism comprises two first air inlet parts and two air outlet parts, the two first air inlet parts are communicated with the first air inlet channel and the air chamber, the two air outlet parts are respectively communicated with the air outlet channel and the air chamber, each first air inlet part comprises an axial flow channel extending axially and a radial blind hole extending radially and communicating with the axial flow channel, the axial flow channel comprises at least one axial opening, the radial blind hole comprises a radial opening which is opened radially, and the radial opening corresponds to and is communicated with the first air inlet channel; and a rotor accommodated in the air chamber.

Preferably, two end faces are arranged on two opposite sides of the cylinder body, the two axial openings are arranged on one of the end faces, at least one of the end faces is provided with two flow guide grooves which respectively correspond to the two axial openings and are communicated with each other, and each flow guide groove comprises a discharge port which is opened in the radial direction and is communicated with the air chamber.

Preferably, the size of each flow guide groove is larger than the size of each axial opening.

Preferably, each of the guiding grooves has a non-perfect circular shape.

Preferably, the cylinder structure includes an inner annular wall forming the air chamber and an outer annular wall disposed on an opposite side of the inner annular wall, and each of the radial openings is disposed on the outer annular wall.

Preferably, the tool main body includes a housing, the housing is provided with the accommodating space, the housing is provided with a main exhaust portion, the main exhaust portion includes at least one main exhaust hole, each main exhaust hole is used for communicating the exhaust channel and the outside, each exhaust portion is provided with an exhaust hole, the exhaust holes of the two exhaust portions are arranged on two opposite sides of the cylinder body and are respectively communicated with the air chamber and the exhaust channel.

Preferably, the tool body further includes a rear cover portion covering the accommodating space, the air supply portion is disposed on the rear cover portion, the rear cover portion is provided with a first flow guide channel, and the first flow guide channel is communicated with the first air inlet channel and the air supply portion.

Preferably, the tool body further includes a second air inlet channel and a valve body, the channel mechanism further includes two second air inlet portions, the two second air inlet portions are communicated with the second air inlet channel, each second air inlet portion has the same structure as each first air inlet portion, the first air inlet channel and the second air inlet channel are communicated with the exhaust channel, the valve body is disposed between the first air inlet channel and the second air inlet channel, and the valve body is switchable between a first position and a second position; when the valve body is at the first position, the first air inlet flow channel is communicated with the exhaust flow channel, and the valve body blocks the second air inlet flow channel from being communicated with the exhaust flow channel and is communicated with the external gas source; when the valve body is at the second position, the second air inlet channel is communicated with the exhaust channel, and the valve body blocks the first air inlet channel from being communicated with the exhaust channel and is communicated with the external gas source.

Preferably, the tool body further includes a rear cover portion, a housing, and a discharge channel, the housing is provided with the accommodating space, the housing is provided with a main exhaust portion, the main exhaust portion is provided with at least one main exhaust hole, each main exhaust hole is used for communicating the exhaust channel with the outside, the air supply portion is provided with the rear cover portion, the rear cover portion covers the accommodating space, the rear cover portion is provided with a first diversion channel and a second diversion channel, the air supply portion can be communicated with the first diversion channel and the second diversion channel, the discharge channel is formed between the rear cover portion, the housing, and the cylinder structure, and the discharge channel is communicated with each main exhaust hole, the first diversion channel, and the second diversion channel.

Preferably, two end faces are arranged on two opposite sides of the cylinder body, the two axial openings are arranged on one of the end faces, at least one of the end faces is provided with two flow guide grooves which respectively correspond to the two axial openings and are communicated with each other, and each flow guide groove comprises a discharge port which is opened in the radial direction and is communicated with the air chamber; each axial flow passage comprises two axial openings arranged at two opposite sides, and the two axial openings of each axial flow passage are respectively arranged at two end faces; the size of each flow guide groove is larger than that of each axial opening; each axial opening and each flow guide groove are respectively in a crescent shape extending towards the circumferential direction; the cylinder structure comprises an inner annular wall forming the air chamber and an outer annular wall arranged on the opposite side of the inner annular wall, and each radial opening is arranged on the outer annular wall; the main exhaust part comprises a plurality of main exhaust holes; each exhaust part is provided with an exhaust hole, and the exhaust holes of the two exhaust parts are arranged on two opposite sides of the cylinder body and are respectively communicated with the air chamber and the exhaust flow channel; each exhaust hole is in a strip shape; the two first air inlet parts are positioned on the same diameter; the two second air inlet parts are positioned on the same diameter; the two exhaust parts are positioned on the same diameter; this back closing cap portion is equipped with one and faces the preceding terminal surface of this cylinder structure, and this preceding terminal surface is equipped with a discharge tank, and this discharge tank is open towards this cylinder structure's direction, and this discharge tank includes a narrow section, an expansion section and an exhaust section, and this narrow section and this exhaust section are mutually led radially and are located the relative both sides of this expansion section, and this narrow section intercommunication is first water conservancy diversion way and this second water conservancy diversion way, and this exhaust section corresponds the main exhaust portion of this shell and leads mutually with each this main exhaust hole, and this discharge tank and this main exhaust portion constitute this emission runner altogether.

The utility model has the advantages that:

the utility model provides a pneumatic tool, it provides and advances, exhaust route and output height and long service life for a short time.

Drawings

Fig. 1 is a perspective view of a preferred embodiment of the present invention.

Fig. 2 is an exploded view of a preferred embodiment of the present invention.

Fig. 3 is a perspective view of a cylinder body according to a preferred embodiment of the present invention.

Fig. 4 is a schematic cross-sectional view of a preferred embodiment of the present invention in reverse operation.

Fig. 5 is a schematic cross-sectional view of the forward motion of a preferred embodiment of the present invention.

Fig. 6 is a schematic cross-sectional view of another reverse operation according to a preferred embodiment of the present invention.

Fig. 7 is a schematic cross-sectional view of an exhaust according to a preferred embodiment of the present invention.

Fig. 8 is a schematic cross-sectional view of another exhaust according to a preferred embodiment of the present invention.

Fig. 9 is a cross-sectional view of a rear cover and a housing in accordance with a preferred embodiment of the present invention.

Fig. 10 is a cross-sectional view of a preferred embodiment of the present invention.

Detailed Description

The following description is given by way of example only, and not by way of limitation, of the scope of the invention.

Referring to fig. 1 to 10, which show a preferred embodiment of the present invention, a pneumatic tool 1 of the present invention includes a tool body 10, a cylinder structure 20 and a rotor 30. The pneumatic tool 1 may be a pneumatic drill, a pneumatic screwdriver, a pneumatic grinder, etc.

The tool body 10 includes a gas supply portion 11 connected to an external gas source, a receiving space 12, a first gas inlet channel 13 and a gas exhaust channel 14, wherein the first gas inlet channel 13 is communicated with the gas supply portion 11, and the gas exhaust channel 14 is communicated with the outside; the cylinder structure 20 is disposed in the accommodating space 12, the cylinder structure 20 includes a cylinder body 21 and a flow channel mechanism 22, the cylinder body 21 includes an air chamber 23, the flow channel mechanism 22 is disposed in the cylinder body 21, the flow channel mechanism 22 includes two first air inlet portions 24 and two air outlet portions 25, the two first air inlet portions 24 are located on the same diameter, the two first air inlet portions 24 communicate with the first air inlet channel 13 and the air chamber 23, the two air outlet portions 25 communicate with the air outlet channel 14 and the air chamber 23, each first air inlet portion 24 includes an axially extending axial flow channel 241 and a radially extending radial blind hole 242 communicating with the axial flow channel 241, the axial flow channel 241 includes at least one axially open axial opening 243, the radial blind hole 242 includes a radially open radial opening 244, and the radial opening 244 corresponds to and communicates with the first air inlet channel 13; and the rotor 30 is accommodated in the air chamber 23. Therefore, the air inlet and the air outlet paths are short, the output power is high, and the service life is long.

The cylinder body 21 has two end faces 26 on opposite sides, the two axial openings 243 are disposed on one of the end faces 26, at least one of the end faces 26 has two flow guide grooves 261 corresponding to the two axial openings 243 respectively and communicating with each other, and each flow guide groove 261 includes a discharge port 262 opening in a radial direction and communicating with the air chamber 23. Preferably, the size of each channel 261 is greater than the size of each axial opening 243. Each of the guiding grooves 261 is non-circular. In the present embodiment, each of the axial openings 243 and each of the guiding grooves 261 are respectively crescent-shaped extending toward the circumferential direction. Thus, when the fluid (gas) is discharged from each of the axial openings 243 to one of the guiding grooves 261, each of the guiding grooves 261 guides the gas to flow toward the cylinder body 21 in the circumferential direction and flow into the air chamber 23 in the radial direction so as to smoothly push the rotor 30 to rotate forward or backward.

The cylinder structure 20 includes an inner annular wall 211 forming the air chamber 23 and an outer annular wall 212 disposed on an opposite side of the inner annular wall 211, and the radial openings 244 are disposed on the outer annular wall 212, so as to simplify the components and shorten the air inlet path so that the air can directly enter the radial openings 244 from the air supply portion 11.

Specifically, the tool main body 10 includes a housing 27, the housing 27 is provided with the accommodating space 12, the housing 27 is provided with a main exhaust portion 271, the main exhaust portion 271 includes at least one main exhaust hole 272, each exhaust hole 251 is strip-shaped, each main exhaust hole 272 is used for communicating the exhaust flow channel 14 with the outside, each exhaust portion 25 is provided with an exhaust hole 251, the exhaust holes 251 of the two exhaust portions 25 are disposed at two opposite sides of the cylinder body 21 and are respectively communicated with the air chamber 23 and the exhaust flow channel 14. In the embodiment, the main exhaust portion 271 includes a plurality of main exhaust holes 272, and the main exhaust portion 271 is disposed at the top of the housing 27 to shorten the exhaust path and stably maintain the pressure in the air chamber 23.

It should be noted that the tool main body 10 further includes a second air inlet channel 15 and a valve body 16, the valve body 16 is disposed on the air supply portion 11, the flow channel mechanism 22 further includes two second air inlet portions 28, the two second air inlet portions 28 are communicated with the second air inlet channel 15, each of the second air inlet portions 28 has the same structure as each of the first air inlet portions 24, specifically, each of the second air inlet portions 28 includes an axial flow channel 281 and a radial blind hole 282, each of the axial flow channels 281 includes two axial openings 283, and each of the radial blind holes 282 includes a radial opening 284. The first intake runner 13 and the second intake runner 15 are communicated with the exhaust runner 14, the valve body 16 is arranged between the first intake runner 13 and the second intake runner 15, and the valve body 16 can be switched between a first position and a second position; when the valve body 16 is at the first position, the first intake runner 13 is communicated with the exhaust runner 14, and the valve body 16 blocks the second intake runner 15 from being communicated with the exhaust runner 14 and is provided for communicating with the external gas source; when the valve body 16 is at the second position, the second inlet channel 15 is communicated with the exhaust channel 14, and the valve body 16 blocks the first inlet channel 13 from being communicated with the exhaust channel 14 and is communicated with the external gas source, i.e. the gas in the gas chamber 23 can be discharged from the exhaust part 25 and then from the first inlet part 24 or the second inlet part 28, specifically, the first inlet part 24 and the second inlet part 28 are used for air intake and the other is used for air exhaust, so as to achieve multi-stage pressure relief, stabilize the pressure in the gas chamber 23 and make the rotor 30 rotate smoothly. In the present embodiment, the second air inlet 28 is located on the same diameter; the two exhaust portions 25 are located on the same diameter, the cylinder body 21 defines a diameter reference line R passing through a center, the two first intake portions 24 are located on opposite sides of the diameter reference line R, and the two second intake portions 28 are located on opposite sides of the diameter reference line R, so as to push the rotor 30 diagonally.

In this embodiment, each of the axial flow channels 241 includes two axial openings 243 disposed on opposite sides, the two axial openings 243 of each of the axial flow channels 241 are respectively disposed on two of the end surfaces 26, when the gas provided by the external gas source enters the axial openings 243 of each of the first gas inlet portions 24 or each of the second gas inlet portions 28, the gas is introduced into the gas chamber 23 along the axial flow channels 241 toward the two axial openings 243, so as to push the rotor 30 from the front side and the rear side to increase the output power.

Preferably, the tool body 10 further includes a rear cover 17 and a discharge channel 18, the housing 27 has the receiving space 12, the air supply portion 11 is disposed on the rear cover 17, the rear cover 17 covers the receiving space 12, the rear cover 17 has a first flow guide 171 and a second flow guide 172, the first flow guide 171 and the second flow guide 172 are open toward the housing 27, the air supply portion 11 can be communicated with the first flow guide 171 and the second flow guide 172, the first flow guide 171 is communicated with the first air inlet channel 24, the discharge channel 18 is formed between the rear cover 17, the housing 27 and the cylinder structure 20, and the discharge channel 18 is communicated with the main exhaust holes 272, the first flow guide 171 and the second flow guide 172. In detail, the rear cover part 17 is provided with a front end face 177 facing the cylinder structure 20, the front end face 177 is provided with a discharge groove 173, the discharge groove 173 is open towards the direction of the cylinder structure 20, the discharge groove 173 comprises a narrow section 174, an expanded section 175 and an exhaust section 176, the narrow section 174 and the exhaust section 176 are mutually communicated and radially provided at two opposite sides of the expanded section 175, the narrow section 174 communicates with the first flow guiding passage 171 and the second flow guiding passage 172, the exhaust section 176 corresponds to the main exhaust part 271 of the housing 27 and is mutually communicated with the main exhaust holes 272, the discharge groove 173 and the main exhaust part 271 together form the exhaust flow passage 18, the structure is simplified and the exhaust path can be shortened.

The cylinder structure 20 includes a front cover 213 and a rear cover 214, the front cover 213 and the rear cover 214 are respectively covered on two opposite sides of the cylinder body 21, and a plurality of v-shaped runners 215 are respectively disposed on end surfaces facing the air chamber 23, the two first air inlets 24 and the two second air inlets 28 respectively correspond to the different v-shaped runners 215, so that the airflows of the two first air inlets 24 and the two second air inlets 28 can be guided into the air chamber 23 through the plurality of v-shaped runners 215 to push the rotor 30, thereby increasing the output power.

In use, gas can be selectively introduced from the first flow guiding channel 171 or the second flow guiding channel 172, the gas sequentially enters the first gas inlet channel 13 from the first flow guiding channel 171 and is guided radially by the two radial openings 244 to the first gas inlet portion 24, and is then poured out from the plurality of axial openings 243 toward the front cover 213 or/and the rear cover 214 of the cylinder structure 20 along the two axial flow channels 241 and is introduced radially into the gas chamber 23, so that the gas can diagonally and radially push the rotor 30 to rotate in a first direction, and furthermore, the gas in the gas chamber 23 can be sequentially discharged from the two radial openings 244 of the second gas inlet portion 28 and the two radial openings 25 to the discharge flow channel 18 and discharged from the main gas outlet holes 272 of the main gas outlet portion 271 of the housing 27; on the contrary, the gas enters from the second flow guiding channel 172 and is discharged from the two exhaust portions 25 and the two first air inlet portions 24, so as to push the rotor 30 to rotate for the second time. One of the first direction and the second direction is a forward direction, and the other is a reverse direction. Further, the direction of the arrows in the figures is the direction of the airflow. In fig. 6 and 7, solid arrows indicate the flow direction of the gas discharged from the axial openings 243, and dashed arrows indicate the flow direction of the gas when the gas is discharged from the axial openings 283.

To sum up, the utility model discloses a pneumatic tool, through this axial runner of each this first air inlet portion and the setting of this radial blind mouth, can lead the gas body radial entering each this first air inlet portion again along axial flow arrange into this air chamber in order to promote this rotor, so provide short advance, exhaust route and output are high and long service life.

The above description is the preferred embodiment of the present invention and the technical principle applied by the same, and for those skilled in the art, without departing from the spirit and scope of the present invention, any obvious changes such as equivalent transformation, simple replacement, etc. based on the technical solution of the present invention all belong to the protection scope of the present invention.

Claims (10)

1. A pneumatic tool, comprising:

the tool main body comprises an air supply part connected with an external air source, an accommodating space, a first air inlet channel and an exhaust channel, wherein the first air inlet channel is communicated with the air supply part, and the exhaust channel is communicated with the outside; and

the cylinder structure is arranged in the accommodating space and comprises a cylinder body and a flow channel mechanism, the cylinder body comprises an air chamber, the flow channel mechanism is arranged in the cylinder body, the flow channel mechanism comprises two first air inlet parts and two air outlet parts, the two first air inlet parts are communicated with the first air inlet channel and the air chamber, the two air outlet parts are respectively communicated with the air outlet channel and the air chamber, each first air inlet part comprises an axial flow channel extending axially and a radial blind hole extending radially and communicating with the axial flow channel, the axial flow channel comprises at least one axial opening opened axially, the radial blind hole comprises a radial opening opened radially, and the radial opening corresponds to and is communicated with the first air inlet channel; and

a rotor accommodated in the air chamber.

2. The pneumatic tool of claim 1, wherein the cylinder body has two end surfaces on opposite sides thereof, the two axial openings are formed in one of the end surfaces, at least one of the end surfaces has two flow guide grooves corresponding to the two axial openings and communicating with each other, and each flow guide groove includes a discharge port opening in a radial direction and communicating with the air chamber.

3. The pneumatic tool of claim 2, wherein the size of each of the channels is greater than the size of each of the axial openings.

4. The pneumatic tool of claim 3, wherein each of the channels is non-circular.

5. The pneumatic tool of claim 4, wherein the cylinder structure includes an inner annular wall defining the plenum and an outer annular wall disposed on an opposite side of the inner annular wall, each of the radial openings being disposed in the outer annular wall.

6. The pneumatic tool of claim 1, wherein the tool body includes a housing, the housing defines the receiving space, the housing defines a main exhaust portion, the main exhaust portion includes at least one main exhaust hole, each main exhaust hole is for communicating the exhaust channel with the outside, each exhaust portion defines an exhaust hole, the exhaust holes of the two exhaust portions are disposed on opposite sides of the cylinder body and respectively communicate the air chamber and the exhaust channel.

7. The pneumatic tool according to any one of claims 1 to 6, wherein the tool body further comprises a rear cover portion covering the receiving space, the gas supply portion is disposed on the rear cover portion, and the rear cover portion has a first flow guiding channel for communicating the first gas inlet channel and the gas supply portion.

8. The pneumatic tool of claim 1, wherein the tool body further comprises a second inlet conduit and a valve body, the conduit mechanism further comprises two second inlet portions, the two second inlet portions are in communication with the second inlet conduit, each second inlet portion is identical in structure to each first inlet portion, the first inlet conduit and the second inlet conduit are in communication with the exhaust conduit, the valve body is disposed between the first inlet conduit and the second inlet conduit, and the valve body is switchable between a first position and a second position; when the valve body is at the first position, the first air inlet flow channel is communicated with the exhaust flow channel, and the valve body blocks the second air inlet flow channel from being communicated with the exhaust flow channel and is communicated with the external gas source; when the valve body is at the second position, the second air inlet channel is communicated with the exhaust channel, and the valve body blocks the first air inlet channel from being communicated with the exhaust channel and is communicated with the external gas source.

9. The pneumatic tool of claim 8, wherein the tool body further comprises a rear cover, a housing, and a discharge channel, the housing has the receiving space, the housing has a main exhaust portion, the main exhaust portion has at least one main exhaust hole, each main exhaust hole is used to connect the exhaust channel and the outside, the air supply portion is disposed on the rear cover, the rear cover covers the receiving space, the rear cover has a first flow guiding channel and a second flow guiding channel, the air supply portion can be connected to the first flow guiding channel and the second flow guiding channel, the discharge channel is formed between the rear cover, the housing, and the cylinder structure, and the discharge channel is connected to each main exhaust hole, the first flow guiding channel, and the second flow guiding channel.

10. The pneumatic tool of claim 9, wherein the cylinder body has two end faces at opposite sides thereof, the two axial openings are formed in one of the end faces, at least one of the end faces has two flow guide grooves corresponding to the two axial openings and communicating with each other, each flow guide groove includes a discharge port opening in a radial direction and communicating with the air chamber; each axial flow passage comprises two axial openings arranged at two opposite sides, and the two axial openings of each axial flow passage are respectively arranged at two end faces; the size of each flow guide groove is larger than that of each axial opening; each axial opening and each flow guide groove are respectively in a crescent shape extending towards the circumferential direction; the cylinder structure comprises an inner annular wall forming the air chamber and an outer annular wall arranged on the opposite side of the inner annular wall, and each radial opening is arranged on the outer annular wall; the main exhaust part comprises a plurality of main exhaust holes; each exhaust part is provided with an exhaust hole, and the exhaust holes of the two exhaust parts are arranged on two opposite sides of the cylinder body and are respectively communicated with the air chamber and the exhaust flow channel; each exhaust hole is in a strip shape; the two first air inlet parts are positioned on the same diameter; the two second air inlet parts are positioned on the same diameter; the two exhaust parts are positioned on the same diameter; this back closing cap portion is equipped with one and faces the preceding terminal surface of this cylinder structure, and this preceding terminal surface is equipped with a discharge tank, and this discharge tank is open towards this cylinder structure's direction, and this discharge tank includes a narrow section, an expansion section and an exhaust section, and this narrow section and this exhaust section are mutually led radially and are located the relative both sides of this expansion section, and this narrow section intercommunication is first water conservancy diversion way and this second water conservancy diversion way, and this exhaust section corresponds the main exhaust portion of this shell and leads mutually with each this main exhaust hole, and this discharge tank and this main exhaust portion constitute this emission runner altogether.

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