TWM667155U - Adjustable angle air tools - Google Patents

Abstract

An adjustable angle pneumatic tool comprises a housing unit having a joint, a cylinder unit mounted on the housing and capable of outputting kinetic energy, a grip unit having a first ear seat and a second ear seat, and a valve rod rotatably sleeved on the first ear seat and the second ear seat and capable of rotating with the joint. The grip unit further comprises an air intake passage extending from a grip to the second ear seat. The valve rod has a transfer passage connected to the air intake passage and capable of guiding a compressed gas into the cylinder unit. Thereby, the present invention can construct a flow path with the air inlet channel and the transfer channel, which can not only improve the space efficiency and air intake volume, but also can simplify the structure of the hinge part and improve the airtight effect through the design of the transfer channel formed in the valve stem.

Description

Adjustable angle air tools

The invention relates to a pneumatic tool, in particular to an angle-adjustable pneumatic tool.

A known pneumatic tool disclosed in Patent Publication No. I779455B of the Republic of China includes a grip portion and a drive head pivotally connected to the grip portion and capable of rotating relative to the grip portion. Thus, Patent No. I779455B can adjust an angle between the drive head and the grip portion, and is suitable for different construction angles.

However, in the first embodiment shown in FIG. 1 and FIG. 2 of patent case No. I779455B, since the connecting space for transmitting a compressed gas is defined between a first pivot part and a second pivot part that can rotate relative to each other, there is a technical problem of air leakage.

Taking the second embodiment shown in FIG. 6 to FIG. 8 of Patent No. 1779455B as an example, although the flow direction of the compressed gas can be changed by a switch installed in the grip portion to achieve the purpose of switching the kinetic energy output direction, the second embodiment of Patent No. 1779455B still has the following disadvantages:

1. Since the switch is mounted on the grip, the compressed gas is blocked by the switch after entering the grip, and only a portion of the airflow can pass through the switch, which not only easily generates back pressure in the grip, but also has technical problems such as large kinetic energy loss and high noise.

2. In addition, in order to achieve the purpose of reversible output of kinetic energy, the gripping portion and the driving head of Patent No. I779455B are respectively provided with two paths for the compressed gas to flow, which not only has a more complicated structure, but also has a technical problem of insufficient air intake due to the small space.

Therefore, the purpose of the present invention is to provide an adjustable angle pneumatic tool that can improve space efficiency and air intake with one flow path, simplify the structure of the hinged part, and improve air tightness.

Therefore, the novel angle-adjustable pneumatic tool includes a housing unit, a cylinder unit, a grip unit, and a valve unit.

The housing unit includes an outer shell defining a chamber, and a joint portion extending from an outer surface of the outer shell toward a direction away from the outer shell.

The cylinder unit is mounted on the outer shell and disposed in the chamber, and is suitable for receiving a compressed gas and can output kinetic energy under the pressure of the compressed gas.

The holding unit includes a first ear seat, a second ear seat spaced apart from the first ear seat and defining a recess with the first ear seat, a holding portion connected to the first ear seat and the second ear seat, and an air intake passage extending from the holding portion to the second ear seat, the first ear seat is configured to prohibit the compressed gas from passing through, and the recess is used to receive the joint portion.

The valve unit includes a valve rod passing through the first ear seat, the second ear seat and the joint. The valve rod is rotatably sleeved on the first ear seat and the second ear seat and can rotate together with the joint. The valve rod has a transfer flow channel connected to the intake flow channel and can guide the compressed gas to enter the cylinder unit.

The effect of the present invention is that a flow path can be constructed with the air inlet channel and the transfer channel, which can not only improve the space efficiency and air intake volume, but also can simplify the structure of the hinge part and improve the airtight effect by forming the transfer channel in the design of the valve stem.

1 to 4 , an embodiment of the novel angle-adjustable pneumatic tool comprises a housing unit 1 , a cylinder unit 2 , a grip unit 3 , a valve unit 4 , and a brake unit 5 .

The housing unit 1 includes a housing 11 defining a chamber 10, and a joint 14 extending from the outer surface of the housing 11 in a direction away from the housing 11 and defining a first axial hole 12 and a valve hole 13. The housing 11 has an end surface 111. The joint 14 has a first flow channel 141 connecting the first axial hole 12 and the valve hole 13, and a second flow channel 142 connecting the valve hole 13 and the chamber 10.

The cylinder unit 2 is mounted on the housing 11 and disposed in the chamber 10. The cylinder unit 2 includes a cylinder 21 adapted to receive a compressed gas, and a rotating member 22 rotatably mounted on the cylinder 21 and used to output kinetic energy. The cylinder 21 has two air inlets 211. Each of the air inlets 211 is connected to a respective second flow channel 142, and is used to guide the compressed gas from the respective second flow channel 142 into the cylinder 21. The rotating member 22 can be subjected to the pressure of the compressed gas entering from any of the air inlets 211, so as to rotate in a clockwise direction or a counterclockwise direction.

The gripping unit 3 extends along a first axis Z, and includes a first ear seat 31, a second ear seat 32 spaced apart from the first ear seat 31 along a second axis X substantially perpendicular to the first axis Z and defining a notch 30 with the first ear seat 31, a gripping portion 33 connected to the first ear seat 31 and the second ear seat 32, an air intake passage 34 extending from the gripping portion 33 to the second ear seat 32, and a second axial hole 35 penetrating the first ear seat 31 and the second ear seat 32 along the second axis X. The notch 30 is used to receive the joint portion 14. The first ear seat 31 is configured to prohibit the compressed gas from passing through, and has a groove chamber 311 extending from the outer surface along a third axis Y substantially perpendicular to the second axis X and opening outward, and a plug hole 312 connected to the second axial hole 35 and the groove chamber 311. The air intake channel 34 has an air intake inlet 341 formed in the grip portion 33 and connected to the outside, and an air intake outlet 342 opposite to the air intake inlet 341 and formed in the second ear seat 32.

The valve unit 4 includes a rotary valve 41 , a valve rod 42 , a connecting bolt 43 , and a ring 44 .

Referring to FIGS. 2 to 5 , the rotary valve 41 is rotatably mounted on the joint 14 and penetrates the valve hole 13, and has an access flow channel 411 for the compressed gas to pass through. The rotary valve 41 can rotate between a forward position (as shown in FIG. 4 ) and a reverse position (as shown in FIG. 5 ) relative to the housing. In the forward position, the access flow channel 411 is connected to the first flow channel 141 and one of the second flow channels 142. In the reverse position, the access flow channel 411 is connected to the first flow channel 141 and the other second flow channel 142.

The valve rod 42 passes through the first ear seat 31, the second ear seat 32 and the joint portion 14 along the second axis X, and is rotatably inserted into the second axial hole 35 and positioned between the first ear seat 31 and the second ear seat 32. The valve rod 42 has a head portion 421 pressed against the second ear seat 32, a tail portion 422 passing through the first ear seat 31, a plurality of recesses 423 formed on the outer peripheral surface and opening toward the first ear seat 31, and a transfer flow channel 424 connected to the air intake outlet 342 of the air intake flow channel 34 and the access flow channel 411 of the rotary valve 41. The valve stem 42 and the second ear seat 32 define a first annular chamber 401 surrounding the second axis X and connected to the air inlet outlet 342, and define a second annular chamber 402 surrounding the second axis X and connected to the first flow channel 141 with the joint portion 14. The transfer flow channel 424 extends along the direction of the second axis X, and has two transfer inlets 425 connected to the first annular chamber 401, and two transfer outlets 426 connected to the second annular chamber 402.

The connecting bolt 43 passes through the joint portion 14 and the valve rod 42 along the direction of the third axis Y, so that the valve rod 42 can rotate together with the joint portion 14 .

The ring member 44 is sleeved on the tail portion 422 and pressed against the first ear seat 31 .

The detent unit 5 is mounted on the first ear seat 31 and inserted into the slot chamber 311 , and includes a fastener 51 , a plug-in unit 52 , and a biasing element 53 .

Referring to FIG. 2 , FIG. 6 and FIG. 7 , the fastener 51 has two protrusions 511 inserted into the insertion hole 312 along the direction of the third axis Y, an operating portion 512 opposite to the protrusions 511 and capable of being operated, and a pivoting portion 513 formed between the protrusions 511 and the operating portion 512 and pivotally connected to the first ear seat 31. The protrusions 511 can be engaged with the corresponding recesses 423. The operating portion 512 is used to drive the protrusions 511 to disengage from the corresponding recesses 423. The fastener 51 can swing between a locking position (as shown in FIG. 6 ) and a release position (as shown in FIG. 7 ) relative to the valve rod 42 along the direction of the third axis Y. When in the locking position, the convex portions 511 are engaged with the first ear seats 31 of the corresponding concave portions 423 through the insertion holes 312. When in the releasing position, the convex portions 511 are separated from the first ear seats 31 of the corresponding concave portions 423.

It should be noted that the number of the protrusions 511 is not limited to two, and in other variations of this embodiment, it may also be one.

The plug-in 52 passes through the first ear seat 31 and the pivoting portion 513 of the fastener 51 along the direction of the second axis X, so that the fastener 51 can swing around the plug-in 52 .

The biasing element 53 is installed between the operating portion 512 and the first ear seat 31 to constantly generate a biasing force to keep the fastener 51 at the buckling position.

Referring to FIGS. 3 to 5 , when the rotary valve 41 rotates to the forward position or the reverse position, the compressed gas is allowed to enter the first annular chamber 401 from the intake inlet 341 of the intake channel 34 through the intake outlet 342. Then, the compressed gas enters the transfer channel 424 through the transfer inlets 425, enters the second annular chamber 402 through the transfer outlets 426, and enters the first channel 141 from the second annular chamber 402. Then, the compressed gas can enter the access channel 411 from the first channel 141 in accordance with the position of the rotary valve 41. Then, the compressed gas enters the cylinder 21 from the access channel 411 through the corresponding second channel 142 and the corresponding intake port 211. Thereby, the rotating member 22 is driven to rotate by the gas pressure of the compressed gas entering the cylinder 21 from different directions, thereby achieving the purpose of outputting kinetic energy.

6 to 9 , the housing unit 1 can rotate relative to the grip unit 3 with the valve rod 42 as the rotation center. The end surface 111 of the housing 11 and the outer peripheral surface of the grip portion 33 form an angle θ. The angle θ is between 30 degrees and 240 degrees.

In normal state, the buckle 51 is located at the buckle position due to the biasing force of the biasing element 53. Thus, the angle θ between the housing unit 1 and the grip unit 3 can be kept fixed.

When a user holds the grip portion 33 with one hand and wants to adjust the angle θ, he only needs to press the operating portion 512 of the fastener 51 with the thumb holding the grip portion 33 until the fastener 51 is in the release position, and the convex portions 511 will be separated from the corresponding concave portions 423. At this time, the user only needs to pull the housing unit 1 to drive the valve rod 42 to rotate relative to the first ear seat 31 and the second ear seat 32 through the joint portion 14. After reaching the predetermined angle θ, the user only needs to release the operating portion 512, and the fastener 51 will be reset to the buckled position under the biasing force of the biasing element 53. In this way, the angle θ between the housing unit 1 and the grip unit 3 is adjusted.

Through the above description, the advantages of the above embodiments can be summarized as follows:

1. The detent unit 5 of the present invention is installed on the first ear seat 31 adjacent to the grip portion 33, and the fastener 51 is configured to move along the direction of the third axis Y. Thus, the fastener 51 can be operated directly with one hand without tools, thereby improving the convenience of operation.

2. The present invention uses the convex parts 511 to block the valve rod 42 from rotating, which is not easy to loosen. In addition, the fastener 51 can be operated in a more labor-saving manner while the angle θ can be fixed. In this way, the stability of the housing unit 1 and the grip unit 3 is improved in normal state, and the ease of operation can be improved when adjusting the angle θ.

3. More importantly, the present invention can achieve the purpose of driving the rotating member 22 in different directions by constructing only one flow path with the air inlet channel 34 and the transfer channel 424. Not only can the space efficiency and air intake be improved, but also the design of the valve stem 42 formed by the transfer channel 424 can simplify the structure of the hinge 513 and improve the airtight effect.

4. In addition, the rotary valve 41 of the present invention is installed on the outer shell 11, so that after the compressed gas enters the grip portion 33 from the outside, it can flow along the flow path unimpeded. In this way, the generation of back pressure can be effectively avoided, and the kinetic energy loss and the noise can be reduced.

However, the above is only an example of the implementation of the present invention, and it cannot be used to limit the scope of the implementation of the present invention. All simple equivalent changes and modifications made according to the scope of the patent application of the present invention and the content of the patent specification are still within the scope of the present patent.

1: Shell unit 10: Chamber 11: Shell 111: End face 12: Shaft hole 13: Valve hole 14: Joint 141: First flow channel 142: Second flow channel 2: Cylinder unit 21: Cylinder 211: Inlet port 22: Rotating member 3: Grip unit 30: Notch 31: First ear seat 311: Groove chamber 312: Socket 32: Second ear seat 33: Grip 34: Inlet flow channel 341: Inlet inlet 342: Inlet outlet 35: Second shaft hole 4: Valve unit 401: First annular chamber 402: Second annular chamber 41: Rotary valve 411: Access channel 42: Valve stem 421: Head 422: Tail 423: Recess 424: Transfer channel 425: Transfer inlet 426: Transfer outlet 43: Connecting bolt 44: Ring 5: Detent unit 51: Fastener 511: Protrusion 512: Operating part 513: Joint 52: Plug-in 53: Biasing element Z: First axis X: Second axis Y: Third axis θ: Interference angle

Other features and functions of the present invention will be clearly presented in the embodiments with reference to the drawings, in which: Figure 1 is a partial three-dimensional view illustrating an embodiment of the present invention's adjustable angle pneumatic tool; Figure 2 is a partial three-dimensional exploded view of the embodiment; Figure 3 is a cross-sectional view of the embodiment; Figure 4 is a cross-sectional view taken along line IV-IV in Figure 3; Figure 5 is a cross-sectional view similar to Figure 4, but with a different position of a rotary valve; Figure 6 is a cross-sectional view taken along line VI-VI in Figure 4, illustrating a fastener of the embodiment in a snap-on position; Figure 7 is a cross-sectional view similar to Figure 6, but with the fastener in a release position; Figure 8 is a partial front view of the embodiment; and FIG. 9 is a partial front view similar to FIG. 8 , but the angle between a shell unit and a grip unit is different.

1: Shell unit

11: Shell

13: Valve hole

142: Second flow channel

2: Cylinder unit

21: Cylinder

211: Air intake

22: Rotating parts

30: Notch

31: First ear seat

32: Second ear seat

33: Grip

34: Intake channel

342: Air intake and outlet

35: Second shaft hole

41: Rotary valve

411: Access flow channel

42: Valve stem

421:Head

422: Tail

423: Concave part

424: Transfer channel

43: Connecting bolts

X: Second axis

Claims (10)

An adjustable angle pneumatic tool comprises: a shell unit, comprising an outer shell defining a chamber, and a joint extending from the outer surface of the outer shell in a direction away from the outer shell; a cylinder unit, mounted on the outer shell and disposed in the chamber, suitable for receiving a compressed gas, and capable of outputting kinetic energy under the pressure of the compressed gas; a grip unit, comprising a first ear seat, a second ear seat spaced from the first ear seat and defining a recess with the first ear seat, a grip connected to the first ear seat and the second ear seat, and an air intake channel extending from the grip to the second ear seat, the first ear seat being configured to prohibit the compressed gas from passing through, and the recess being used to receive the joint; and A valve unit includes a valve rod passing through the first ear seat, the second ear seat and the joint portion, the valve rod is rotatably sleeved on the first ear seat and the second ear seat, and can rotate together with the joint portion, and the valve rod has a transfer flow channel connected to the intake flow channel and capable of guiding the compressed gas into the cylinder unit. An angle-adjustable pneumatic tool as described in claim 1, wherein the air inlet channel extends along a first axis, has an air inlet formed on the grip and connected to the outside, and an air inlet outlet opposite to the air inlet and formed on the second ear seat, and the air inlet outlet is used to guide the compressed gas into the transfer channel. An angle-adjustable pneumatic tool as described in claim 2, wherein the transfer channel extends in the direction of a second axis substantially perpendicular to the first axis, and has at least one transfer inlet connected to the air inlet outlet, and at least one transfer outlet connected to the cylinder unit. An angle-adjustable pneumatic tool as described in claim 3, wherein the valve stem and the second ear seat define a first annular chamber surrounding the second axis and connected to the air inlet outlet and the at least one transfer inlet, and define a second annular chamber surrounding the second axis and connected to the cylinder unit with the joint. An adjustable angle pneumatic tool as described in claim 4, wherein the joint defines a first axial hole and a valve hole, and has a first flow channel connected to the first axial hole and the valve hole, and two second flow channels connected to the valve hole and the chamber, the cylinder unit has two air inlets, each of the air inlets is connected to a respective second flow channel, the valve unit further includes a rotary valve mounted on the joint, the valve stem is inserted into the first axial hole, the rotary valve is rotatably inserted into the valve hole along a third axis substantially perpendicular to the second axis, and the rotary valve has an access flow channel connected to the first flow channel and one of the second flow channels. An angle-adjustable pneumatic tool as described in claim 1, wherein the gripping unit extends in the direction of a first axis, and further includes a second axial hole penetrating the first ear seat and the second ear seat along a second axis substantially perpendicular to the first axis, and the valve rod is rotatably inserted in the second axial hole and positioned between the first ear seat and the second ear seat. An angle-adjustable pneumatic tool as described in claim 6, wherein the valve unit further comprises a connecting bolt, which passes through the joint and the valve rod so that the valve rod can rotate together with the joint. An angle-adjustable pneumatic tool as described in claim 6, wherein the valve unit further includes a ring, the valve rod has a head portion pressed against one of the first ear seat and the second ear seat, and a tail portion passing through the other of the first ear seat and the second ear seat, the ring is sleeved on the tail portion and pressed against the other of the first ear seat and the second ear seat. The angle-adjustable pneumatic tool as described in claim 1 also includes a detent unit, the valve rod having a plurality of recesses formed on the outer circumferential surface, the detent unit being mounted on the first ear seat, having at least one protrusion capable of engaging with the corresponding recess, and an operating portion opposite to the at least one protrusion and capable of being operated to drive the at least one protrusion to separate from the corresponding recess. An adjustable angle pneumatic tool as described in claim 9, wherein the first ear seat has a groove chamber opening outward, the detent unit includes a fastener and a biasing element inserted through the groove chamber, the fastener has the at least one protrusion and the operating portion, and a pivoting portion formed between the at least one protrusion and the operating portion and pivotally connected to the first ear seat, the fastener can swing between a locking position and a release position relative to the valve stem, in the locking position, the at least one protrusion is engaged with the corresponding protrusion of the recess, and the operating portion is adjacent to one of the ear seats, in the release position, the at least one protrusion is disengaged from the corresponding recess, and the operating portion is away from one of the ear seats, and the biasing element is installed between the operating portion and the first ear seat to constantly generate a biasing force that causes the fastener to be located in the locking position.

Images