CN113386075B

CN113386075B - Pneumatic spanner

Info

Publication number: CN113386075B
Application number: CN202010176291.5A
Authority: CN
Inventors: 何全政
Original assignee: Yueh Chi Enterprise Co Ltd
Current assignee: Yueh Chi Enterprise Co Ltd
Priority date: 2020-03-13
Filing date: 2020-03-13
Publication date: 2023-02-03
Anticipated expiration: 2040-03-13
Also published as: CN113386075A

Abstract

The invention relates to a pneumatic wrench, which comprises a handle, a tool head and a rotating shaft, wherein the handle is provided with a main body, two extending walls extend out from one end of the main body at intervals, a clamping groove is formed between the two extending walls, a first air channel is arranged inside the main body and the two extending walls, the tool head comprises a head part, a neck part extends out from the head part and extends into the clamping groove, a second air channel is arranged inside the head part and the neck part, the rotating shaft penetrates through the handle and the tool head to enable the tool head to swing relative to the handle, the rotating shaft is provided with a rod body, a shaft hole is arranged inside the rod body, two first through holes are arranged on the rod body, and a second through hole is arranged on the rod body, the first through hole and the second through hole are communicated with the shaft hole, and therefore, the first air channel of the handle is communicated with the second air channel through the first through hole, the shaft hole and the second through hole. The pneumatic wrench can adjust the angle according to the requirement of a user, improve the use smoothness and greatly increase the tolerance of application occasions.

Description

Pneumatic spanner

Technical Field

The present invention relates to a pneumatic wrench, and more particularly to a pneumatic wrench capable of flexibly adjusting an angle according to a field condition.

Background

The general pneumatic wrench comprises a handle, a pneumatic motor, an air inlet, an adjusting button, and an output shaft connected with the pneumatic motor, wherein the air inlet is disposed on the handle and communicated with the pneumatic motor, air enters the pneumatic motor through the air inlet and serves as a power source of the pneumatic motor, and a user can switch the flowing direction of the air entering the pneumatic motor by adjusting the adjusting button, so as to adjust the rotating direction of the output shaft to be forward rotation or reverse rotation.

Although the conventional pneumatic wrench has a structural design capable of adjusting forward and reverse rotation and light weight, since the extending direction of the output shaft is about perpendicular to the extending direction of the handle, a user needs to swing the angle of the wrist of the user during actual operation to enable the extending direction of the output shaft to conform to a construction position, so that the smoothness of use is greatly reduced, occupational injury of the user is easily caused, and even a small space does not allow the pneumatic wrench to adjust the angle, so that smooth construction cannot be realized. Therefore, how to improve the above-mentioned deficiencies is a technical problem to be solved by those skilled in the art.

Disclosure of Invention

The invention aims to provide a pneumatic wrench, which can adjust the angle according to the requirement of a user and improve the use smoothness. Another objective of the present invention is to provide a pneumatic wrench, which can flexibly adjust the angle according to the construction site conditions, thereby greatly increasing the tolerance of the application.

In order to achieve the above object, the pneumatic wrench of the present invention comprises a handle, a tool head and a shaft, wherein the handle has a main body, two extending walls extending from one end of the main body at an interval, a locking groove formed between the two extending walls, a first air channel formed inside the main body and the two extending walls, and two first pivot holes passing through the two extending walls and communicating with the first air channel, the tool head comprises a head, a neck extending from the head and extending into the locking groove, a second air channel formed inside the head and the neck, and a second pivot hole passing through the neck and communicating with the second air channel, the shaft passes through the first pivot hole of the handle and the second pivot hole of the tool head, the tool head can swing relative to the handle, the rotating shaft is provided with a rod body, a shaft hole is arranged in the rod body, two first annular grooves are arranged on the outer periphery of the rod body and correspond to the two extension walls, a second annular groove is arranged on the outer periphery of the rod body and correspond to the neck, two first through holes are arranged on the rod body and are positioned in the first annular grooves, and a second through hole is arranged on the rod body and is positioned in the second annular groove; therefore, the pneumatic wrench can adjust the angle according to the requirements of users, can improve the use smoothness and greatly increase the tolerance of application occasions.

Drawings

FIG. 1 is a perspective view of a pneumatic wrench in accordance with a preferred embodiment of the present invention;

FIG. 2 is an exploded view of a pneumatic wrench in accordance with a preferred embodiment of the present invention;

FIG. 3 is a cross-sectional view of a grip of a pneumatic wrench in accordance with a preferred embodiment of the present invention;

FIG. 4 is a cross-sectional view of the tool head of the air wrench in accordance with a preferred embodiment of the present invention;

FIG. 5 is a perspective view of a spindle of the pneumatic wrench in accordance with a preferred embodiment of the present invention;

FIG. 6 is a cross-sectional view of a spindle of the air wrench in accordance with a preferred embodiment of the present invention;

fig. 7 is a perspective view of a tool head of a pneumatic wrench at a different angle according to a preferred embodiment of the present invention.

[ notation ] to show

1 … pneumatic wrench

10 … grip 11 … body 13 … extending wall

15 … clamping groove 16 … first air channel

17 … Main flow channel 18 … Branch flow channel

19 … first pivot hole L … axial line

20 … tool head 21 … head 23 … neck

25 … second air passage 27 … second pivot hole

29 … output shaft 291 … axle center

30 … pivot 31 … rod 32 … axle hole

321 … open end 322 … closed end

33 … first ring groove 34 … first through hole

35 … second ring groove 36 … second through hole

37 … third ring groove 38 … air-tight ring

39 … plug

40 … pneumatic motor 42 … rotor

Detailed Description

Referring to fig. 1 and 2, a pneumatic wrench 1 according to a preferred embodiment of the present invention includes a handle 10, a tool head 20, and a shaft 30 passing through the handle 10 and the tool head 20.

Referring to fig. 3, the handle 10 has a rod-shaped main body 11, two extending walls 13 extending upward from the top end of the main body 11 at intervals, a clamping groove 15 formed between the two extending walls 13, a first air channel 16 disposed inside the main body 11 and the two extending walls 13, and two first pivot holes 19 penetrating through the two extending walls 13 along the left-right direction and communicating with the first air channel 16, wherein the first air channel 16 includes a main channel 17 and two branch channels 18, the main channel 17 extends from the bottom end of the main body 11 and extends upward, the two branch channels 18 communicate with the top end of the main channel 17 and extend from the main body 11 to the two extending walls 13, each branch channel 18 communicates with each first pivot hole 19, the two first pivot holes 19 are located on the same axis L, and the axis L is approximately perpendicular to the extending direction of the main body 11.

Referring to fig. 4, the tool head 20 includes a head 21, a neck 23 extending downward from the head 21 and extending into the locking groove 15, a second air passage 25 disposed inside the head 21 and the neck 23, a second pivot hole 27 passing through the neck 23 in the left-right direction and communicating with the second air passage 25, an output shaft 29 extending forward from the head 21, and a pneumatic motor 40 disposed inside the head 21 and connected to the output shaft 29, the second air passage 25 communicating with the pneumatic motor 40 upward, the output shaft 29 being driven by the pneumatic motor 40 to rotate, wherein if 0 ° represents that the tool head 20 is parallel to the main body 11 of the grip 10, the tool head 20 can swing at an angle of-60 ° to 60 ° relative to the grip 10, i.e., can swing forward or backward.

As shown in fig. 5 and 6, the rotating shaft 30 passes through the first pivot hole 19 of the handle 10 and the second pivot hole 27 of the tool head 20, so that the tool head 20 can swing back and forth relative to the handle 10, i.e., the tool head 20 is pivoted to the handle 10 through the rotating shaft 30, and the axis 291 of the output shaft 29 is perpendicular to the rotating shaft 30 during the swinging of the tool head 20 relative to the handle 10. The rotating shaft 30 has a rod 31, a shaft hole 32 disposed inside the rod 31, two first annular grooves 33 disposed on the outer periphery of the rod 31 and corresponding to the two extending walls 13, a second annular groove 35 disposed on the outer periphery of the rod 31 and corresponding to the neck 23, four first through holes 34 disposed on the rod 31 and corresponding to the two first annular grooves 33, two second through holes 36 disposed on the rod 31 and corresponding to the second annular groove 35, and six third annular grooves 37 disposed on the outer periphery of the rod 31, the extending direction of the rod 31 is perpendicular to the extending direction of the main body 11 of the handle 10, the shaft hole 32 is recessed from one end of the rod 31, as seen in fig. 6, the left end of the shaft hole 32 is an open end 321, the right end of the shaft hole 32 is a closed end 322, the first through holes 34 and the second through holes 36 are both communicated with the shaft hole 32, the four first through holes 34 are disposed opposite to each other and corresponding to the two first annular grooves 33, the second through holes 36 are disposed opposite to the second annular groove 35, the third annular grooves 37 are disposed on both sides of the shaft hole 32, and the other two closed ends of the shaft hole 32 are omitted, wherein the closed ends of the shaft hole 32 are disposed with the closed ends, the two annular grooves 39, and the other annular grooves are disposed respectively, and the two annular grooves of the second through holes 32 are disposed respectively, the closed ends of the plug member 32.

It should be noted that, in the present embodiment, the positions of the first through holes 34 approximately correspond to the two branch channels 18, the positions of the second through holes 36 approximately correspond to the second air channels 25, in other embodiments, the numbers and positions of the first through holes 34 and the second through holes 36 may be changed, at least two of the first through holes 34 are located in each first annular groove 33, at least one of the second through holes 36 is located in the second annular groove 35, the positions of the first annular grooves 33 correspond to the branch channels 18, and the positions of the second annular grooves 35 correspond to the second air channels 25, so that the gas can be transmitted from the two branch channels 18 of the handle 10 to the second air channels 25 of the tool head 20.

In the present embodiment, in order to prevent the gas from dissipating from the two sides of the first and second

annular grooves

33, 35, six airtight rings 38 are further disposed on the rod 31 of the rotating shaft 30, and the airtight rings 38 are respectively accommodated in the third annular grooves 37 and abut against the inner edges of the first and

second pivot holes

19, 27 by their outer peripheries.

As shown in fig. 7, which is a perspective view of the tool head 20 swung to 60 ° relative to the handle 10, in actual operation, air enters the shaft hole 32 through the main flow passage 17 and the two branch flow passages 18 of the first air passage 16, the two first grooves 33 and the two first through holes 34, and then air flows to the second air passage 25 of the tool head 20 through the second through hole 36 and the second groove 35 from the shaft hole 32, so as to drive the rotor 42 of the air motor 40 located at the head 21 of the tool head 20. Since the gas flows to the two first through holes 34 through the first ring groove 33 and flows to the second gas channel 25 of the tool head 20 through the second ring groove 35, the gas can be smoothly supplied from the handle 10 to the pneumatic motor 40 of the tool head 20 no matter the tool head 20 is rotated to any angle. Therefore, the pneumatic wrench 1 can flexibly adjust the angle of the tool head 20 according to the user's requirement or the construction site situation, thereby improving the use smoothness, adapting to various environments, especially narrow spaces, and greatly increasing the application tolerance.

Other variations of the structure of the air wrench 1 are possible based on the design spirit of the present invention, such as: other variations of the structure of the first air duct 16 are possible; or the tool head 20 can swing at an angle of-90 to 90 degrees relative to the handle 10; alternatively, the third annular groove 37 can be omitted and the number of the air-tight rings 38 can vary; alternatively, the airtight rings 38 may be omitted. For example, all such structural changes that can be easily conceived are intended to be covered by the scope of the present invention.

Claims

1. A pneumatic wrench, comprising:

a handle, which is provided with a main body, two extension walls which are mutually extended from one end of the main body at intervals, a clamping groove which is formed between the two extension walls, a first air channel which is arranged inside the main body and the two extension walls, and two first pivot holes which are arranged through the two extension walls and are communicated with the first air channel;

the tool head comprises a head part, a neck part, a second air passage and a second pivot hole, wherein the neck part extends out of the head part and extends into the clamping groove; and

the tool head is provided with a rod body, a shaft hole is arranged inside the rod body, two first annular grooves are arranged on the outer periphery of the rod body and correspond to the two extending walls, a second annular groove is arranged on the outer periphery of the rod body and corresponds to the neck, two first through holes are arranged on the rod body and are located in the first annular grooves, and a second through hole is arranged on the rod body and is located in the second annular grooves.

2. The pneumatic wrench as claimed in claim 1, further comprising a plurality of airtight rings disposed around the shaft of the shaft and located on both sides of the first ring groove and both sides of the second ring groove.

3. The air wrench as claimed in claim 2, wherein the shaft body of the shaft has a plurality of third ring grooves for receiving the plurality of airtight rings therein.

4. The air wrench as claimed in claim 1, wherein the axial hole is recessed from one end of the rod body, one end of the axial hole is an open end, the other end of the axial hole is a closed end, and the open end is provided with a stopper to close both ends of the axial hole.

5. The pneumatic wrench as claimed in claim 1, wherein the shaft of the shaft extends in a direction perpendicular to the main body of the grip.

6. The pneumatic wrench as claimed in claim 1, wherein the first air passage includes a main flow passage extending from one end of the main body and two branch flow passages communicating with the main flow passage and extending from the main body to the two extending walls.

7. The air wrench as claimed in claim 1, wherein the tool head includes an output shaft extending from the head portion, the output shaft being substantially perpendicular to the axis of rotation during swinging of the tool head relative to the handle.

8. The pneumatic wrench as claimed in claim 1, wherein the tool head is rotatable about the handle at an angle of-90 ° to 90 °.

9. The pneumatic wrench as claimed in claim 8, wherein the tool head is rotatable about the handle at an angle of-60 ° to 60 °.