TWM599232U - Pneumatic tool - Google Patents

Abstract

This creation relates to a pneumatic tool, including: a tool body; and a cylinder structure, which is arranged on the tool body, the cylinder structure includes a cylinder body and a flow passage mechanism, the cylinder body includes an air chamber, and the flow passage mechanism is arranged in The cylinder body, the runner mechanism includes two first intake parts and two exhaust parts, the two first intake parts communicate with the air chamber, and the two exhaust parts communicate with the outside and the air chamber respectively. The first air inlet portion includes an axial flow passage extending in the axial direction and a radial blind hole extending radially and conducting the axial flow passage. The axial flow passage includes at least one axial opening that is open in the axial direction. The radial blind hole includes a radial opening that is radially open, and the radial opening corresponds to and communicates with the first air inlet flow passage.

Description

Pneumatic tools

This creation is especially about a pneumatic tool.

Pneumatic tools are one of the commonly used assembly tools in general factories. They are used to tighten or loosen nuts, bolts and other fastening parts, and are widely loved by many workers. The main reason is that high-pressure gas as a power source is easy to obtain, does not pollute the environment, and has high stability and safety.

A general pneumatic tool includes a rotating mechanism and a shell. The shell includes a front shell and a rear shell. The rear shell contains the rotating mechanism, and the rear end of the rear shell is provided with an air inlet flow. The rotation mechanism has a cylinder and a rotation mechanism housed in the cylinder. The cylinder is provided with an intake passage that communicates the inside of the cylinder and the intake flow passage of the rear housing. However, the intake of the cylinder The air passage runs radially through the wall of the cylinder, such as TW287457, and gas is directly injected into the cylinder to push the rotating mechanism, resulting in excessive gas pressure and excessive unilateral deflection of the rotor, which is easy to wear.

Therefore, it is necessary to provide a novel and progressive pneumatic tool to solve the above-mentioned problems.

The main purpose of this creation is to provide a pneumatic tool that provides short inlet and exhaust paths, high output power and long service life.

In order to achieve the above-mentioned object, the author provides a pneumatic tool, which includes: a tool body, including an air supply part connected to an external gas source, an accommodation space, a first air inlet flow path and an exhaust flow path. The first intake flow passage communicates with the air supply part, the exhaust flow passage communicates with the outside; and a cylinder structure arranged in the accommodating space. The cylinder structure includes a cylinder body and a flow passage mechanism, the cylinder body including An air chamber, the flow passage mechanism is arranged on the cylinder body, the flow passage mechanism includes two first intake parts and two exhaust parts, the two first intake parts communicate with the first intake flow passage and the air chamber, The two exhaust parts respectively communicate with the exhaust runner and the air chamber, and each of the first intake parts includes an axial runner extending axially and a radial blind extending radially and leading to the axial runner A hole, the axial flow path includes at least one axial opening that is axially open, the radial blind hole includes a radial opening that is radially open, the radial opening corresponds to and communicates with the first intake flow path; and The rotor is contained in the air chamber.

The following examples are only used to illustrate the possible implementation of this creation, but it is not intended to limit the scope of the creation to be protected, and it is first stated.

Please refer to FIGS. 1 to 10, which show a preferred embodiment of this creation. The pneumatic tool 1 of this creation includes a tool body 10, a cylinder structure 20 and a rotor 30. The pneumatic tool 1 can be a pneumatic drill, a pneumatic screwdriver, a pneumatic grinder, and the like.

The tool body 10 includes an air supply portion 11 connected to an external gas source, an accommodation space 12, a first inlet flow passage 13 and an exhaust flow passage 14, the first inlet flow passage 13 communicates with the supply The air portion 11, the exhaust runner 14 is connected to the outside; and the cylinder structure 20 is arranged in the accommodating space 12, the cylinder structure 20 includes a cylinder body 21 and a flow passage mechanism 22, the cylinder body 21 includes an air chamber 23 The runner mechanism 22 is provided on the cylinder body 21. The runner mechanism 22 includes two first intake parts 24 and two exhaust parts 25. The two first intake parts 24 are located on the same diameter. The intake part 24 communicates with the first intake runner 13 and the air chamber 23, the two exhaust parts 25 respectively communicate with the exhaust runner 14 and the air chamber 23, and each of the first intake parts 24 includes a shaft A radially extending axial flow passage 241 and a radial blind hole 242 that extends radially and communicates with the axial flow passage 241. The axial flow passage 241 includes at least one axial opening 243 that is open in the axial direction. The hole 242 includes a radial opening 244 that is radially open, and the radial opening 244 corresponds to and communicates with the first air inlet passage 13; and the rotor 30 is accommodated in the air chamber 23. In this way, it provides short intake and exhaust paths, high output power and long service life.

The cylinder body 21 is provided with two end faces 26 on two opposite sides. The two axial openings 243 are provided on one of the end faces 26. At least one of the end faces 26 is provided with two guides respectively corresponding to the two axial openings 243 and communicating with each other. The grooves 261, each of the guide grooves 261 includes a discharge port 262 that opens in the radial direction and communicates with the air chamber 23. Preferably, the size of each guide groove 261 is larger than the size of each axial opening 243. Each of the guide grooves 261 has a non-circular shape. In this embodiment, each of the axial openings 243 and each of the diversion grooves 261 are respectively crescent-shaped extending in the circumferential direction. In this way, when fluid (gas) is discharged from each of the axial openings 243 to one of the guide grooves 261, each of the guide grooves 261 can guide the gas to flow in the circumferential direction of the cylinder body 21 and flow into the air chamber 23 radially. To smoothly push the rotor 30 forward or reverse.

The cylinder structure 20 includes an inner ring wall 211 forming the air chamber 23 and an outer ring wall 212 provided on the opposite side of the inner ring wall 211. Each of the radial openings 244 is provided on the outer ring wall 212. The parts are simplified and the air inlet path is shortened so that the gas can directly enter each of the radial openings 244 from the gas supply portion 11.

Specifically, the tool 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, and the main exhaust portion 271 includes at least one main exhaust hole 272, Each of the exhaust holes 251 is elongated, each of the main exhaust holes 272 is for communicating the exhaust runner 14 with the outside, each of the exhaust portions 25 is provided with an exhaust hole 251, the two exhaust portions 25 The exhaust hole 251 is provided on two opposite sides of the cylinder body 21 and communicates with the air chamber 23 and the exhaust runner 14 respectively. In this embodiment, the main exhaust portion 271 includes a plurality of the main exhaust holes 272, and the main exhaust portion 271 is provided on the top of the housing 27 to shorten the exhaust path and stably maintain the pressure in the air chamber 23 .

It is worth mentioning that the tool body 10 further includes a second air inlet runner 15 and a valve body 16, the valve body 16 is disposed on the air supply portion 11, and the runner mechanism 22 further includes two second air inlets The two second air inlets 28 communicate with the second air inlet flow passage 15. The structure of each of the second air inlets 28 is the same as that of the first air inlets 24. Specifically, each of the second air inlets The air inlet 28 includes an axial flow passage 281 and a radial blind hole 282, each of the axial flow passages 281 includes two axial openings 283, and the radial blind hole 282 includes a radial opening 284. The first intake flow passage 13 and the second intake flow passage 15 are in communication with the exhaust flow passage 14, and the valve body 16 is arranged between the first intake flow passage 13 and the second intake flow passage 15 In between, the valve body 16 can be switched between a first position and a second position; when the valve body 16 is in the first position, the first intake runner 13 and the exhaust runner 14 are connected, The valve body 16 blocks the conduction between the second intake flow passage 15 and the exhaust flow passage 14 and provides conduction with the external gas source; when the valve body 16 is in the second position, the second intake flow passage 15 is connected to the exhaust flow passage 14, and the valve body 16 blocks the first intake flow passage 13 and the exhaust flow passage 14 to communicate with the external gas source, that is, in the gas chamber 23 The gas can be partially exhausted from the exhaust portion 25, and then partially exhausted by the first intake portion 24 or the second intake portion 28. Specifically, the first intake portion 24 and the second intake portion 28 The air portion 28 takes in air and the other is exhausted, achieving a multi-stage pressure relief, which can stabilize the pressure in the air chamber 23 and make the rotor 30 rotate smoothly. In this embodiment, the two second inlets 28 are located on the same diameter; the two exhausts 25 are located on the same diameter, and the cylinder body 21 defines a diameter reference line R passing through a center, and the two first inlets The air portion 24 is located on two opposite sides of the diameter reference line R, and the two second air inlet portions 28 are located on two opposite sides of the diameter reference line R, so that the rotor 30 can be pushed diagonally by air intake.

In this embodiment, each of the axial flow passages 241 includes two axial openings 243 provided on two opposite sides, and the two axial openings 243 of each of the axial flow passages 241 are respectively provided on the two end faces 26, when The gas provided by the external gas source enters the axial opening 243 of each of the first air inlets 24 or each of the second air inlets 28, and the gas will be introduced along the axial flow passage 241 toward the two axial openings 243 The air chamber 23 can push the rotor 30 from the front and the back to increase the output power.

Preferably, the tool body 10 further includes a rear cover portion 17 and a discharge channel 18, the housing 27 is provided with the accommodating space 12, the air supply portion 11 is provided on the rear cover portion 17, and the rear The cover portion 17 covers the accommodating space 12, the rear cover portion 17 is provided with a first flow channel 171 and a second flow channel 172, the first flow channel 171 and the second flow channel 172 Open to the housing 27, the air supply portion 11 can be connected to the first guide passage 171 and the second guide passage 172, the first guide passage 171 is connected to the first intake passage 24, the The exhaust flow passage 18 is formed between the rear cover portion 17, the housing 27 and the cylinder structure 20, the exhaust flow passage 18 and each of the main exhaust holes 272, the first flow guide 171 and the second flow guide Road 172 is connected. In detail, the rear cover portion 17 is provided with a front end surface 177 facing the cylinder structure 20, and the front end surface 177 is provided with a drain groove 173 which opens toward the cylinder structure 20, and the drain groove 173 includes A narrow section 174, an enlarged section 175, and an exhaust section 176. The narrow section 174 and the exhaust section 176 are radially disposed on two opposite sides of the enlarged section 175 so as to communicate with each other. The narrow section 174 communicates with the first The guide passage 171 and the second guide passage 172, the exhaust section 176 corresponds to the main exhaust portion 271 of the housing 27 and communicates with each of the main exhaust holes 272, the exhaust groove 173 and the main exhaust The part 271 co-constructs the exhaust runner 18, simplifying the structure and shortening the exhaust path.

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 the end faces facing the air chamber 23 are respectively provided with plural ㄑ-shaped flow passage 215, the two first air intake portions 24 and the two second air intake portions 28 respectively correspond to different ㄑ-shaped flow passages 215, whereby the two first air intake portions 24 and the two second air intake portions The air flow in the part 28 can be introduced into the air chamber 23 by the plurality of ""-shaped flow channels 215" to push the rotor 30 to increase the output power.

In use, the gas can be selected to enter from the first guide passage 171 or the second guide passage 172, the gas enters the first inlet flow passage 13 from the first guide passage 171 and then flows from the two The radial opening 244 radially guides the first air inlet portion 24, and then along the two axial flow passages 241, from the plurality of axial openings 243 toward the front cover 213 or/and the rear cover 214 of the cylinder structure 20 Out and radially into the gas chamber 23, and the gas can push the rotor 30 diagonally and radially, pushing the rotor 30 to rotate in the first direction. Furthermore, the gas in the gas chamber 23 can be successively discharged from the two exhaust parts 25 And two of the radial openings 244 of the second air inlet portion 28 are discharged to the discharge channel 18 and discharged from each of the main exhaust holes 272 of the main exhaust portion 271 of the casing 27; otherwise, the gas is discharged from the The second guide passage 172 enters and the two exhaust portions 25 and the two first intake portions 24 exit to push the rotor 30 to rotate for the second time. One of the first direction and the second direction is forward, and the other is reverse. For further explanation, the direction of the arrow in the figure is the direction of the airflow. In FIGS. 6 and 7, the solid arrow indicates the flow direction of the gas discharged from each of the axial openings 243, and the dotted arrow indicates the gas flow direction when discharged from each of the axial openings 283.

In summary, the pneumatic tool of this creation, through the arrangement of the axial flow channel and the radial blind port of each of the first air inlets, can guide gas radially into each of the first air inlets and then along the axial direction. The flow is discharged into the air chamber to push the rotor, so short inlet and exhaust paths are provided, and the output power is high and the service life is long.

1: pneumatic tools 10: Tool body 11: Air supply department 12: Housing space 13: The first intake runner 14: Exhaust runner 15: Second intake runner 16: valve body 17: Rear cover 171: The first diversion channel 172: Second diversion channel 173: Drain Slot 174: Narrow Section 175: swelling section 176: Exhaust section 177: Front face 18: Discharge runner 20: Cylinder structure 21: Cylinder body 211: inner ring wall 212: Outer Ring Wall 213: front cover 214: back cover 215: ㄑ-shaped runner 22: Runner mechanism 23: Air chamber 24: The first air intake 241: Axial flow channel 242: radial blind hole 243: Axial opening 244: Radial opening 25: Exhaust 251: Vent 26: end face 261: diversion groove 262: Drain 27: Shell 271: Main exhaust 272: Main vent 28: The second air intake 281: Axial flow channel 282: radial blind hole 283: Axial opening 284: Radial opening 30: Rotor R: Diameter reference line

Figure 1 is a perspective view of a preferred embodiment of the creation. Figure 2 is an exploded view of a preferred embodiment of the creation. Figure 3 is a three-dimensional view of a cylinder body of a preferred embodiment of creation. Figure 4 is a cross-sectional schematic diagram of the reverse action of creating a preferred embodiment. Figure 5 is a schematic cross-sectional view of the forward movement of a preferred embodiment of the creation. Figure 6 is a schematic cross-sectional view of another reverse action of creating a preferred embodiment. Figure 7 is a schematic cross-sectional view of the exhaust of a preferred embodiment created. Figure 8 is a schematic cross-sectional view of another exhaust created by a preferred embodiment. Figure 9 is a cross-sectional view of a rear cover and a housing of a preferred embodiment of the creation. Figure 10 is a cross-sectional view of a preferred embodiment of the creation.

1: pneumatic tools

10: Tool body

17: Rear cover

27: Shell

271: Main exhaust

Claims (10)

A pneumatic tool, including: A tool body includes an air supply part connected to an external gas source, an accommodating space, a first inlet flow passage and an exhaust flow passage, the first inlet flow passage communicates with the air supply part, and the exhaust The air flow channel is for communicating with the outside; and A cylinder structure is arranged in the accommodating space, and includes a cylinder body and a flow passage mechanism. The cylinder body includes an air chamber. The flow passage mechanism is arranged on the cylinder body. The flow passage mechanism includes two first air inlets and two An exhaust part, the two first intake parts communicate with the first intake runner and the air chamber, the two exhaust parts communicate with the exhaust runner and the air chamber respectively, and each of the first intake parts includes a An axial flow passage extending in the axial direction and a radial blind hole extending radially and communicating with the axial flow passage, the axial flow passage includes at least one axial opening that is open in the axial direction, and the radial blind hole includes a diameter An open radial opening, the radial opening corresponds to and communicates with the first intake flow passage; and A rotor is accommodated in the air chamber. The pneumatic tool according to claim 1, wherein the cylinder body is provided with two end faces on two opposite sides, the two axial openings are provided on one of the end faces, at least one of the end faces is provided with two corresponding to the two axial openings and The diversion grooves communicated with each other, each of the diversion grooves includes a discharge opening that opens in the radial direction and communicates with the air chamber. The pneumatic tool according to claim 2, wherein the size of each diversion groove is larger than the size of each axial opening. The pneumatic tool according to claim 3, wherein each of the guide grooves is in a non-circular shape. The pneumatic tool according to claim 4, wherein the cylinder structure includes an inner ring wall constituting the air chamber and an outer ring wall arranged on the opposite side of the inner ring wall, and each of the radial openings is arranged on the outer ring wall. Ring wall. The pneumatic tool according to claim 1, wherein the tool body includes a housing provided with the accommodating space, the housing is provided with a main exhaust part, and the main exhaust part includes at least one main exhaust hole, each The main exhaust hole is connected to the exhaust runner and the outside. Each exhaust portion is provided with an exhaust hole. The exhaust holes of the two exhaust portions are provided on two opposite sides of the cylinder body and communicate with the The air chamber and the exhaust runner. The pneumatic tool according to any one of claims 1 to 6, wherein the tool body further includes a rear cover part, the rear cover part covers the accommodating space, and the air supply part is provided on the rear cover Part, the rear cover part is provided with a first flow guide, and the first flow guide is for communication with the first intake flow path and the air supply part. The pneumatic tool according to claim 1, wherein the tool body further includes a second air inlet flow passage and a valve body, the flow passage mechanism further includes two second air inlets, and the two second air inlets communicate with the A second intake runner, each second intake part has the same structure as each of the first intake part, the first intake runner and the second intake runner communicate with the exhaust runner, the The valve body is arranged between the first intake flow passage and the second intake flow passage. The valve body can be switched between a first position and a second position; when the valve body is in the first position , The first intake flow passage is connected to the exhaust flow passage, and the valve body blocks the connection between the second intake flow passage and the exhaust flow passage and provides conduction with the external gas source; when the valve body is in the In the second position, the second intake flow passage is connected to the exhaust flow passage, and the valve body blocks the first intake flow passage and the exhaust flow passage to communicate with the external gas source. The pneumatic tool according to claim 8, wherein the tool body further includes a rear cover part, a housing, and a discharge channel, the housing is provided with the accommodation space, the housing is provided with a main exhaust part, and the main The exhaust portion is provided with at least one main exhaust hole, each of the main exhaust holes is connected to the exhaust runner and the outside, the air supply portion is provided on the rear cover portion, and the rear cover portion covers the container The rear cover part is provided with a first flow channel and a second flow channel, the air supply part can be communicated with the first flow channel and the second flow channel, the rear cover part, The discharge flow passage is formed between the casing and the cylinder structure, and the discharge flow passage is communicated with each of the main exhaust holes, the first flow passage and the second flow passage. The pneumatic tool according to claim 9, wherein the cylinder body is provided with two end faces on two opposite sides, the two axial openings are provided on one of the end faces, at least one of the end faces is provided with two corresponding to the two axial openings and The guide grooves communicated with each other, each of the guide grooves includes a discharge opening that opens in the radial direction and communicates with the air chamber; each of the axial flow passages includes two axial openings arranged on two opposite sides, each of the axial The two axial openings of the flow channel are respectively provided on the two end faces; the size of each diversion groove is larger than the size of each axial opening; each axial opening and each diversion groove extend crescents in the circumferential direction, respectively The cylinder structure includes an inner ring wall constituting the air chamber and an outer ring wall on the opposite side of the inner ring wall, each of the radial openings is provided in the outer ring wall; the main exhaust portion includes A plurality of the main exhaust holes; each of the exhaust portions is provided with an exhaust hole, and the exhaust holes of the two exhaust portions are provided on two opposite sides of the cylinder body and respectively communicate with the air chamber and the exhaust runner; Each of the exhaust holes is elongated; the two first intake portions are located on the same diameter; the two second intake portions are located on the same diameter; the two exhaust portions are located on the same diameter; the rear cover portion is provided There is a front end surface facing the cylinder structure, the front end surface is provided with a discharge groove which is open toward the direction of the cylinder structure. The discharge groove includes a narrow section, an enlarged section and an exhaust section, the narrow section and the The exhaust section is mutually conductive and radially arranged on two opposite sides of the enlarged section. The narrow section communicates with the first guide passage and the second guide passage. The exhaust section corresponds to the main exhaust section of the housing and is connected to the The main exhaust holes communicate with each other, and the exhaust groove and the main exhaust part jointly constitute the exhaust flow channel.

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