TWM569806U - Pneumatic tool with air guiding structure - Google Patents

Abstract

A pneumatic tool with a gas guiding structure comprises an air intake unit, a head shell portion, a cylinder and a steering valve assembly; wherein the positive and negative swirling air holes of the cylinder are used on a main casing provided on the head shell portion The two intake passages, the four through holes of the baffle and the two passages formed by the two recesses of the rear cover are indirectly connected with the relay passage of the steering valve assembly; the novel structure is simple, and the cylinder and the steering valve are utilized. The indirect connection can reduce the machining accuracy and cost of the cylinder, and reduce the wear between the steering valve assembly and the cylinder during use, thereby prolonging the service life of the pneumatic tool.

Description

Pneumatic tool with air guiding structure

The present invention relates to a pneumatic tool, and more particularly to a gas guiding structure in which a cylinder of a pneumatic tool is indirectly connected to a steering valve.

The present invention has a body, a cylinder and a steering valve, wherein the body is provided with an intake passage and an exhaust passage, and the cylinder is disposed in the body and is provided with a positive rotation. An intake hole, a reverse air intake hole, and a vent hole communicating with the exhaust passage of the body, the steering valve is disposed in the intake passage of the body and adjacent to the cylinder, and is provided with a relay passage; When the relay passage of the steering valve communicates with the positive-rotation air inlet of the cylinder, the airflow enters from the positive-rotation air inlet of the cylinder to drive the rotor in the cylinder to rotate forward, when the relay valve of the steering valve is When the counter-rotating air inlet of the cylinder is in communication, the airflow enters from the counter-rotating air inlet of the cylinder to drive the rotor in the cylinder to reverse.

Since the airflow of the existing pneumatic tool is directly introduced into the cylinder by the relay passage of the steering valve, and the steering valve is a movable member, in order to ensure a good airtight connection between the steering valve and the cylinder, the machining precision of the cylinder is required to be high, and the cylinder is increased. The difficulty of processing and the increase of manufacturing cost; and after the long-term use of the steering valve, it is easy to wear the cylinder and reduce the service life of the cylinder, which is actually improved.

In view of this, the main object of the present invention is to provide a pneumatic tool with a gas guiding structure, the steering valve is indirectly connected with the cylinder, thereby reducing the cylinder processing cost and increasing the service life of the cylinder.

In order to achieve the above object, a pneumatic tool with a gas guiding structure of the present invention includes an intake direction; an axial direction intersecting the intake direction; and an intake unit provided with a direction along the intake direction. a main intake passage; a shell portion connected to one end of the air intake unit in the intake direction, comprising a main housing connected to the air intake unit; a cylinder chamber disposed in the main housing And forming an opening in a side along the axial direction; both of the intake air passages are disposed in the main casing, and are not in communication with the cylinder chamber, respectively defined as a first intake air flow passage and a second In the air flow passage, each of the intake air passages forms an air inlet on a side facing the air intake unit, and an air outlet is formed on one side of the opening of the cylinder chamber; an exhaust passage is disposed in the main casing Connecting the cylinder chamber and the outside of the main casing; a baffle is disposed on one side of the opening of the cylinder chamber, and is provided with four through holes, and defines a first inlet hole, a first outlet hole, a second inlet hole, and a second outlet hole, and the first inlet hole is disposed at an air outlet corresponding to the first intake air passage and is associated with the first inlet The air outlet of the flow channel is connected, the second inlet hole is disposed at an air outlet corresponding to the second air inlet flow channel and communicates with the air outlet of the second intake air flow channel, the first outlet hole and the second outlet hole The holes are respectively disposed at the corresponding cylinder chambers; and a rear cover is disposed on a side of the baffle away from the main casing, and a first groove and a second groove are recessed toward a side of the baffle a first recess communicating with the first inlet and the first outlet of the baffle, the second recess communicating with the second inlet and the second outlet of the baffle; a cylinder disposed on the head a cylinder chamber of the shell portion, comprising a reverse swirling air hole, which is disposed at a first outlet hole corresponding to the baffle and adjacent to the first outlet hole of the baffle; a positively screwed into the air hole Provided at a second outlet corresponding to the baffle and adjacent to the second outlet of the baffle; At least one venting hole communicating with the exhaust passage of the head casing portion; and a steering valve assembly coupled between the air intake unit and the head casing portion, including a forward rotation position, a reverse rotation position, and a middle Following the flow passage, when the steering valve assembly is in the reverse position, the relay flow passage connects the main intake passage and the inlet port of the first intake passage of the head casing portion when the steering valve assembly is at the forward rotation In the position, the relay flow path communicates with the main intake passage and the inlet port of the second intake runner of the head casing.

The pneumatic tool with a gas guiding structure as described above, wherein the steering valve assembly is rotatably coupled between the air intake unit and the head casing portion, and includes a steering valve disposed in the main intake passage. And the relay channel is disposed on the steering valve; a rotating ring is rotatably connected to the air intake unit, and is rotatable in the forward rotation position and the reverse position of the steering valve assembly; and a connecting member is connected The steering valve and the rotating ring.

Preferably, the steering valve assembly further includes a connecting seat disposed in the main intake flow passage and connected to the steering valve.

Preferably, the air tool having a gas guiding structure as described above is provided with a resilient member between the connecting seat of the steering valve assembly and the steering valve.

In the pneumatic tool with a gas guiding structure as described above, preferably, the exhaust passage of the head casing portion includes an exhaust branch passage, and an opening is formed in a side of the main casing facing the air intake unit, And communicating with the exhaust passage; the steering valve of the steering valve assembly further has a venting groove recessed toward a side of the main casing, adjacent to the relay passage and not communicating with the main exhaust passage; When the steering valve assembly is in the reverse position, the exhaust groove communicates with the second intake passage and the exhaust branch of the head casing, and when the steering valve assembly is in the forward rotation position, the exhaust groove communicates with the head casing The first intake passage and the exhaust branch.

With the above technical means, the enhancements achieved by the novel are:

1. The cylinder of the present invention is indirectly connected with the steering valve assembly, and has a simple structure, an easy processing and assembly method, and can reduce the machining precision of the cylinder, thereby reducing the processing cost and defective products of the cylinder.

2. The cylinder of the present invention is indirectly connected to the steering valve assembly, so that when the steering valve assembly is displaced between the forward position and the reverse position, the cylinder is not directly worn, and the service life of the cylinder can be extended.

10‧‧‧Air intake unit

11‧‧‧Main intake passage

12‧‧‧Valve assembly

121‧‧‧Switch parts

20‧‧‧ head shell

21‧‧‧Main housing

211‧‧‧Steering valve chamber

212‧‧‧Limited slot

22‧‧‧Cylinder room

23‧‧‧First Intake Runner

24‧‧‧Second intake runner

231,241‧‧‧ inlet

232, 242‧‧ vents

25‧‧‧Exhaust runner

251‧‧‧Exhaust branch

26‧‧‧Baffle

261‧‧‧First access hole

262‧‧‧First exit

263‧‧‧second access hole

264‧‧‧Second hole

27‧‧‧Back cover

271‧‧‧First groove

272‧‧‧second groove

30‧‧‧ cylinder

31‧‧‧ air chamber

32‧‧‧Rotor

33‧‧‧Reversely venting

34‧‧‧Spinning the vent

35‧‧‧ venting holes

40‧‧‧Steering valve assembly

41‧‧‧Steering valve

411‧‧‧Exhaust trough

42‧‧‧swing

43‧‧‧Connecting parts

44‧‧‧ Relay channel

441‧‧‧First relay through hole

442‧‧‧Second relay through hole

45‧‧‧Connecting seat

46‧‧‧Flexible components

50‧‧‧Heart assembly

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

Figure 2 is an exploded perspective view of the preferred embodiment of the present invention.

3 is an exploded perspective view of the head casing and the cylinder of the preferred embodiment of the present invention.

4 is a partial perspective cross-sectional view of the main housing of the preferred embodiment of the present invention.

Figure 5 is a partial perspective cross-sectional view of the main housing of the preferred embodiment of the present invention.

Figure 6 is an exploded perspective view of the steering valve assembly of the preferred embodiment of the present invention.

Figure 7 is a cross-sectional, cross-sectional view of the steering valve assembly in a reverse position, in accordance with a preferred embodiment of the present invention.

Figure 8 is a cross-sectional, cross-sectional view of the steering valve assembly in a forward position, in accordance with a preferred embodiment of the present invention.

Figure 9 is a cross-sectional side elevational view of the preferred embodiment of the present invention.

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

Figure 11 is a partial perspective cross-sectional view showing the flow of the airflow when the steering valve assembly is in the reverse position in the preferred embodiment of the present invention.

Figure 12 is a schematic end elevational view of the flow of airflow when the steering valve assembly is in the reverse position, in accordance with a preferred embodiment of the present invention.

A preferred embodiment of the pneumatic tool with a gas guiding structure of the present invention, together with reference to FIGS. 1 and 2, includes an intake direction, an axial direction, an intake unit 10, a head portion 20, and a cylinder 30. A steering valve assembly 40 and a spindle assembly 50. Wherein the direction of the intake air intersects with the axial direction; The gas unit 10 is connected to an external air supply device, and includes a main intake air flow passage 11 and a gas valve assembly 12, the main intake air flow passage 11 is disposed along the intake air direction, and the gas valve assembly 12 is disposed at The main intake air passage 11 is connected to a switch member 121. When the switch member 121 is pressed, the air valve assembly 12 is opened to communicate with the external air supply device, and the air flow is from the main air intake passage 11. enter.

The head shell portion 20 is connected to one end of the air intake unit 10 in the intake direction. Referring to FIGS. 3 to 5, a main housing 21, a cylinder chamber 22, a first intake air passage 23, and a first housing are provided. a second intake passage 24, an exhaust passage 25, a baffle 26, and a rear cover 27; the main casing 21 is connected to the intake unit 10; the cylinder chamber 22 is disposed in the main casing 21 An opening is formed on a side along the axial direction; the first intake flow passage 23 and the second intake flow passage 24 are both disposed in the main casing 21, and are not in communication with the cylinder chamber 22, An air inlet 231, 241 is formed on a side of the air intake unit 10, and an air outlet 232, 242 is formed on the same side of the cylinder chamber 22; the exhaust passage 25 is disposed in the main housing 21 and communicates with the air outlet The cylinder chamber 22 and the outside of the main casing 21; the baffle 26 is disposed on one side of the opening of the cylinder chamber 22, and is adjacent to the main casing 21 to shield the cylinder chamber 22. The baffle 26 is provided with four through holes. The first inlet hole 261, the first outlet hole 262, the second inlet hole 263 and the second outlet hole 264 are respectively defined as the air outlet 232 corresponding to the first intake air flow passage 23. And The air outlet 232 of the first intake air passage 23 communicates with the air inlet 242 corresponding to the second intake air passage 24 and communicates with the air outlet 242 of the second intake air passage 24. The first outlet hole 262 and the second outlet hole 264 are respectively disposed at the corresponding cylinder chamber 22; the rear cover 27 is disposed on a side of the baffle 26 away from the main casing 21, and is bolted to the main The housing 21 is fixedly connected to the side of the baffle 26 and has a first recess 271 and a second recess 272. The first recess 271 communicates with the first inlet 261 of the baffle 26. And a first hole 262, the second groove 272 is connected to the second inlet hole 263 and the second hole 264 of the baffle 26.

The cylinder 30 is disposed in the cylinder chamber 22 of the head shell portion 20, and includes a gas chamber 31, a rotor 32, a reverse swirling air hole 33, a positive swirling air hole 34 and at least one air venting hole 35. Room 31 The rotor 32 is rotatably disposed in the air chamber 31. The reverse air inlet 33 and the positive air inlet 34 are respectively communicated with the air chamber 31, and the reverse air inlet 33 is provided. Corresponding to the first outlet 262 of the baffle 26 and communicating with the first outlet 262 of the baffle 26, the positive spigot 34 is disposed at the second outlet 264 corresponding to the baffle 26 and The second outlet hole 264 of the baffle 26 communicates with the gas chamber 31 and the exhaust passage 25 of the head shell portion 20.

The steering valve assembly 40 is rotatably coupled between the air intake unit 10 and the head housing portion 20, and includes a forward rotation position, a reverse rotation position, and a steering valve 41. a rotating ring 42, a connecting member 43 and a relay passage 44; the steering valve 41 is airtightly disposed in the main intake passage 11, and the rotating ring 42 is rotatably connected to the air intake unit 10, the connection The valve 43 is connected to the steering valve 41 and the rotating ring 42 , and the steering valve 41 is coupled with the rotating ring 42 . The relay passage 44 is disposed through the steering valve 41 along the intake direction. The relay passage 44 can be A through hole or a plurality of through holes are disposed in the air intake direction. In this embodiment, the relay channel 44 includes a first relay through hole 441 and a second relay through hole 442. When the valve assembly 40 is in the reverse position, please refer to FIG. 7. The first relay through hole 441 is in communication with the air inlet hole 231 of the first intake air flow passage 23. When the steering valve assembly 40 is in the forward rotation position, please refer to In FIG. 8, the second relay via 442 is in communication with the second intake runner 24.

Referring to FIGS. 6 and 9 , the steering valve assembly 40 further includes a connecting seat 45 disposed in the main intake runner 11 and connected to the steering valve 41 for connecting and positioning the steering valve. 41 is located at the opposite position of the main intake passage 11, and an elastic member 46 is disposed between the connecting seat 45 and the steering valve 41 for pushing the steering valve 41, and the steering valve 41 and the main body of the head shell portion 20 are provided. The housing 21 is attached to each other to reduce the gap between the relay passage 44 of the steering valve assembly 40 and the first intake runner 23 and the second intake runner 24 of the head casing 20; please refer to FIG. 4 and FIG. The main housing 21 may further be provided with a steering valve chamber 211 at an end facing the air intake unit 10 to form an extension of the main intake passage 11, the first intake air passage 23 and the second intake air flow. The inlet port 231, 241 of the passage 24 communicates with the steering valve chamber 211, the steering valve 41 is airtightly disposed in the steering valve chamber 211, and the connecting seat 45 is connected to the end of the steering valve chamber 211 The side of the steering valve chamber 211 is provided with a limiting slot 212. The connecting member 43 of the steering valve assembly 40 is connected to the limiting slot 212 to connect the steering valve 41 and the rotating ring 42 and can limit the rotating ring. 42 rotates in the interval between the forward position and the reverse position.

The steering valve assembly 40 as described above can also be restrained by other means, for example, the ring 42 is provided with a limiting portion, and the limiting portion of the rotating ring 42 is used to engage the air intake unit 10 or the main casing 21 In turn, the relative rotation range of the rotating ring 42 is restricted, or the limiting valve is provided in the steering valve 41, and the steering valve 41 is engaged with the head casing 20, the connecting seat 45 or the side wall of the intake passage 11 And the range in which the rotation of the swivel 42 is restricted is changed.

The mandrel assembly 50, as shown in FIG. 2, is coupled to the rotor 32 of the cylinder 30 and is rotated by the rotor 32 of the cylinder 30.

Preferably, referring to FIG. 5, FIG. 9, FIG. 10, the exhaust passage 25 of the main casing 20 includes an exhaust branch 251 that communicates with the exhaust passage 25 and the steering valve chamber 211. The valve 41 is recessed toward a side of the main casing 20 with a venting groove 411 adjacent to the relay passage 44 and not communicating with the main intake passage 11; when the steering valve assembly 40 is in the reverse position The exhaust groove 411 communicates with the exhaust branch 251 of the main casing 20 and the inlet port 241 of the second intake passage 24. When the steering valve assembly 40 is in the forward rotation position, the exhaust slot 411 communicates with the main casing. The exhaust branch 251 of the body 20 and the first intake passage 23 are in the air inlet 231.

Referring to FIG. 7 , FIG. 11 and FIG. 12 , when the steering valve assembly 40 is in the reverse position, the airflow enters the first relay through hole 441 of the steering valve assembly 40 from the main intake passage 11 and flows to the head. a first intake runner 23 of the shell portion 20, and sequentially flows into the cylinder through the first inlet hole 261 of the baffle 26, the first groove 271 of the rear cover 27, and the first outlet 262 of the baffle 26 The reverse rotation of the air inlet 33 and the rotation of the rotor 32 in the reverse direction, and the gas in the air chamber 31 of the cylinder 30 is driven by the rotor 32, and the main casing 20 is passed through the at least one exhaust hole 35. The exhaust gas passage 25 is discharged, and the gas that is not discharged from the exhaust hole 35 in the cylinder 30 can be from the positively-injected air hole 34 through the second outlet hole 264 of the baffle 26, the back cover The second groove 272 of the baffle, the second inlet hole 263 of the baffle flows into the second intake air passage 24 into the exhaust groove 411, and flows from the exhaust branch 251 to the exhaust passage 25 And discharging; when the steering valve assembly 40 is in the forward rotation position, the air flow enters the second relay through hole 442 of the steering valve assembly 40 from the main intake passage 11 to the second portion of the head casing portion 20 The air flow passage 24 flows into the positive air vent of the cylinder 30 through the second inlet hole 263 of the baffle 26, the second groove 272 of the rear cover 27, and the second outlet 264 of the baffle 26. 34, and the rotor 32 is rotated in the forward rotation direction, and the gas in the air chamber 31 of the cylinder 30 is driven by the rotor 32, and is exhausted from the exhaust passage 25 of the main casing 20 via the at least one exhaust hole 35. Discharged, and the gas that is not discharged from the vent hole 35 in the cylinder 30 can pass from the reverse vent hole 33 through the first outlet hole 262 of the baffle 26, the first groove 271 of the rear cover 27, and the baffle The first inlet hole 261 flows into the first intake passage 23 into the exhaust groove 411, and is discharged from the exhaust passage 251 to the exhaust passage 25.

According to the above technical means, the pneumatic tool with the air guiding structure of the present invention utilizes the relay passage 44 of the steering valve assembly 40 to indirectly communicate with the reverse air inlet hole 33 and the positively screwing air hole 34 of the cylinder 30, thereby driving the The rotor 32 of the cylinder 30 rotates forward or reverse, has a simple structure, is easy to process and assemble, and can reduce the processing precision of the cylinder 30, thereby reducing processing costs and defective products, and because the cylinder 30 and the steering valve assembly 40 are indirect. The connection can reduce the wear of the steering valve assembly 40 to the cylinder 30, and extend the life of the cylinder 30 and the like.

The above description is only a preferred embodiment of the present invention, and is not intended to limit the present invention in any way. Any person having ordinary knowledge in the art can use the present invention without departing from the technical features of the present invention. Equivalent embodiments of the novel modifications or modifications made by the novel disclosed subject matter, without departing from the scope of the present invention, are still within the scope of the present invention.

Claims (10)

A pneumatic tool having a gas guiding structure, comprising an intake direction; an axial direction intersecting the intake direction; an intake unit having a main intake flow passage disposed along the intake direction; a shell portion connected to one end of the air intake unit in the intake direction, comprising a main housing connected to the air intake unit; a cylinder chamber disposed in the main housing and along the shaft An opening is formed on one side; two intake flow passages are disposed in the main casing, and are not in communication with the cylinder chamber, respectively defined as a first intake flow passage and a second intake flow passage, respectively An air inlet port is formed on a side of the air flow passage, and an air outlet is formed on a side of the opening of the cylinder chamber; an exhaust passage is disposed in the main casing and communicates with the cylinder chamber and the air passage a baffle plate is disposed on one side of the opening of the cylinder chamber and is provided with four through holes, and defines a first inlet hole, a first outlet hole, a second inlet hole and a second outlet hole, respectively, and The first inlet hole is disposed at an air outlet corresponding to the first intake air passage and communicates with an air outlet of the first intake air passage. a second inlet hole is disposed at an air outlet corresponding to the second intake air passage and communicates with an air outlet of the second intake air passage, and the first outlet hole and the second outlet hole are respectively disposed in the corresponding cylinder chamber And a back cover disposed on a side of the baffle away from the main casing, wherein a first groove and a second groove are recessed toward a side of the baffle, and the first groove is connected a first inlet hole and a first outlet hole of the baffle, the second groove communicates with the second inlet hole and the second outlet hole of the baffle; a cylinder is disposed in the cylinder chamber of the head shell portion, and comprises a reversely inserted air hole, which is disposed at a first outlet hole corresponding to the baffle and adjacent to the first outlet hole of the baffle; a positively screwed into the air hole, which is disposed on the corresponding baffle a second outlet hole and adjacent to the second outlet hole of the baffle; and at least one vent hole communicating with the exhaust passage of the head shell portion; and a steering valve assembly connected to the air intake unit And between the head shell portion, comprising a forward rotation position, a reverse rotation position and a relay flow path, when the steering valve assembly is in the reverse position, the relay flow path connection An inlet port of the main intake passage and the first intake passage of the head casing, and when the steering valve assembly is in the forward rotation position, the relay flow passage communicates with the main intake passage and the head casing The air inlet of the second intake runner. The pneumatic tool with a gas guiding structure according to claim 1, wherein the steering valve assembly is rotatably coupled between the air intake unit and the head casing portion, and includes a steering valve disposed at the main air intake In the passage, the relay passage is disposed in the steering valve; a rotating ring is rotatably connected to the air intake unit, and is rotatable in the forward rotation position and the reverse position of the steering valve assembly; and a connection And connect the steering valve and the rotating ring. The pneumatic tool with a gas guiding structure according to claim 2, the steering valve assembly further comprising a connecting seat disposed in the main intake flow passage and connected to the steering valve. A pneumatic tool having a gas guiding structure according to claim 3, wherein a resilient member is disposed between the connecting seat of the steering valve assembly and the steering valve. The pneumatic tool with a gas guiding structure according to claim 4, wherein the exhaust passage of the head casing portion includes an exhaust branch passage that forms an opening and communicates with a side of the main casing facing the intake unit The exhaust valve; the steering valve of the steering valve assembly further has a venting groove recessed toward a side of the main casing, adjacent to the relay passage and not communicating with the main exhaust passage; when the steering When the valve assembly is in the reverse position, the exhaust groove communicates with the second intake passage and the exhaust branch of the head casing portion, and when the steering valve assembly is in the forward rotation position, the exhaust groove communicates with the first shell portion An intake passage and an exhaust branch. The pneumatic tool with a gas guiding structure according to claim 5, wherein the main housing further extends a steering valve chamber toward the air intake unit to form an extension of the main intake passage, the first intake air passage and An air inlet of the second intake runner communicates with the steering valve chamber; a steering valve of the steering valve assembly is airtightly disposed in the steering valve chamber. The pneumatic tool with a gas guiding structure according to claim 6, wherein a side wall of the steering valve chamber of the main housing is provided with a limiting groove, and a connecting member of the steering valve assembly is disposed through the limiting groove to connect the steering Valve and the swivel. A pneumatic tool having an air guiding structure according to claim 7, wherein the connecting seat of the steering valve assembly is locked at an end of the steering valve chamber of the head casing portion. The air tool having a gas guiding structure according to claim 2 or 3, wherein the exhaust passage of the head casing portion includes an exhaust branch that forms an opening in a side of the main casing facing the air intake unit, and Connecting the exhaust passage; the steering valve of the steering valve assembly further has a venting groove recessed toward a side of the main casing, adjacent to the relay passage and not communicating with the main exhaust passage; When the steering valve assembly is in the reverse position, the exhaust groove communicates with the second intake passage and the exhaust branch of the head casing portion, and when the steering valve assembly is in the forward rotation position, the exhaust groove communicates with the head casing portion. The first intake passage and the exhaust branch. The pneumatic tool with a gas guiding structure according to any one of claims 1 to 8, wherein the relay passage of the steering valve assembly includes a first relay through hole and a second relay through hole, when the steering valve When the component is in the reverse position, the first relay through hole communicates with the first intake air flow passage of the head shell portion, and when the steering valve assembly is in the forward rotation position, the second relay through hole and the head shell portion The second intake runner is in communication.