TWI711511B - Pneumatic wrench - Google Patents

Abstract

The pneumatic wrench of the present invention includes a handle, a tool head, and a rotating shaft. The handle has a main body, two extending walls extending from one end of the main body at intervals, a clamping groove is formed between the two extending walls, and a first air passage Set inside the main body and the two extension walls, the tool head includes a head, a neck extends from the head and extends into the clamping groove, and a second airway is provided inside the head and the neck, and the rotating shaft penetrates the grip The handle and the tool head enable the tool head to swing relative to the handle. The rotating shaft has 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. Both a through hole and a second through hole are connected to the shaft hole, whereby the first air passage of the handle communicates with the second air passage through the first through hole, the shaft hole and the second through hole. The pneumatic wrench can adjust the angle according to the user's needs, improve the smoothness of use, and can greatly increase the tolerance of the application.

Description

Pneumatic wrench

The invention relates to a pneumatic wrench, and particularly refers to a pneumatic wrench whose angle can be adjusted elastically according to site conditions.

A general pneumatic wrench includes a handle, an air motor, an air inlet, an adjustment button, and an output shaft connected to the air motor, wherein the air inlet is provided on the handle and communicated with the air motor. It enters the air motor through the air inlet and serves as the power source of the air motor. The user can switch the flow direction of the air entering the air motor by adjusting the adjustment button, and then can adjust the rotation direction of the output shaft as Forward or reverse.

Although the existing pneumatic wrench has a structural design that can adjust the forward and reverse rotation and lightweight, however, since the extension direction of the output shaft is approximately perpendicular to the extension direction of the grip, the user needs to swing the angle of his wrist during actual operation In order to make the extension direction of the output shaft conform to the construction position, this will not only greatly reduce the smoothness of use, but also easily cause occupational injuries to the user. Even some small spaces do not allow the pneumatic wrench to adjust the angle, so that the smooth construction cannot be performed. Therefore, how to improve the above deficiencies becomes a technical problem that those skilled in the art want to solve.

The purpose of the present invention is to provide a pneumatic wrench, which can adjust the angle according to the needs of users and improve the smoothness of use. Another object of the present invention is to provide a pneumatic wrench, which can adjust the angle flexibly according to the conditions of the construction site, greatly increasing the tolerance of the application occasion.

In order to achieve the above object, the pneumatic wrench of the present invention includes a handle, a tool head and a rotating shaft. The handle has a main body, two extending walls extending from one end of the main body at intervals, and a clamping groove is formed in the handle. Between the two extension walls, a first air passage is provided inside the main body and the two extension walls, and two first pivot holes pass through the two extension walls and communicate with the first air passage. The tool head includes a head, A neck extends from the head and extends into the clamping groove, a second airway is provided inside the head and the neck, and a second pivot hole penetrates the neck and is connected to the first The two air passages are connected. The shaft passes through the first pivot hole of the handle and the second pivot hole of the tool head, so that the tool head can swing relative to the handle. The shaft has a rod body and a shaft hole arranged in Inside the rod body, two first ring grooves are provided on the outer periphery of the rod body and are positioned corresponding to the two extending walls, a second ring groove is provided on the outer periphery of the rod body and positioned corresponding to the neck, and two first through holes are provided On the rod body and located in the first ring groove, and a second through hole is provided on the rod body and located in the second ring groove, the first through holes and the second through holes are all connected with the shaft hole, Thereby, the first air passage of the grip is connected to the second air passage of the tool head through the first ring grooves, the first through holes, the shaft hole, and the second through hole; thereby, the pneumatic wrench can The angle can be adjusted according to the needs of the user, and the smoothness of use can be improved, and the tolerance of the application can be greatly increased.

Hereinafter, the technical content and features of the present invention will be described in detail with a preferred embodiment with drawings. As shown in Figures 1 and 2, the pneumatic wrench 1 provided by a preferred embodiment of the present invention includes a handle 10. A tool head 20 and a rotating shaft 30 pass through the handle 10 and the tool head 20.

Please refer to Figure 3 at the same time, the handle 10 has a rod-shaped main body 11, two extension walls 13 are spaced apart from each other and extend upward from the top end of the main body 11, and a clamping groove 15 is formed in the two extension walls 13 In between, a first air passage 16 is provided inside the main body 11 and the two extension walls 13, and two first pivot holes 19 pass through the two extension walls 13 in the left-right direction and communicate with the first air passage 16, wherein the The first airway 16 includes a main flow channel 17 and two branch flow channels 18. The main flow channel 17 extends from the bottom end of the main body 11 and extends upward. The two branch flow channels 18 communicate with the top end of the main flow channel 17 and are connected by the main body 11 Extending to the two extension walls 13, each of the branch channels 18 communicates with each of the first pivot holes 19, the two first pivot holes 19 are located on the same axis L and the axis L is approximately perpendicular to the extension direction of the main body 11.

Please refer to FIG. 4 at the same time. The tool head 20 includes a head 21, a neck 23 extending downward from the head 21 and extending into the clamping groove 15, and a second airway 25 is provided in the head The portion 21 and the interior of the neck portion 23, a second pivot hole 27 penetrates the neck portion 23 in the left-right direction and communicates with the second airway 25, an output shaft 29 extends forward from the head portion 21, and A pneumatic motor 40 is arranged in the head 21 and connected to the output shaft 29. The second air passage 25 is connected upwardly with the pneumatic motor 40. The output shaft 29 can be driven by the pneumatic motor 40 to rotate. 0∘ represents that the tool head 20 is parallel to the main body 11 of the grip 10, and the tool head 20 can swing at an angle of -60∘~60∘ relative to the grip 10, that is, it can swing forward or backward.

As shown in Figures 5 and 6, the 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 rotate back and forth relative to the handle 10. Pendulum, that is, the tool head 20 is pivoted to the handle 10 by the shaft 30, and the tool head 20 is pivoted to the handle 10 by the shaft 30. The rotating shaft 30 has a rod body 31, a shaft hole 32 disposed inside the rod body 31, two first ring grooves 33 are disposed on the outer periphery of the rod body 31, and positions corresponding to the two extending walls 13 and a second ring groove 35 Located on the outer periphery of the rod body 31 and corresponding to the neck portion 23, four first through holes 34 are provided on the rod body 31 and respectively located in the two first ring grooves 33 and the second second through holes 36 are provided on the rod The body 31 is located in the second ring groove 35 and the six third ring grooves 37 are provided on the outer periphery of the rod body 31. The extension direction of the rod body 31 is perpendicular to the extension direction of the main body 11 of the handle 10, and the shaft hole 32 is recessed by one end of the rod body 31. As can be seen from Figure 6, the left end of the shaft hole 32 is an open end 321, and the right end of the shaft hole 32 is a closed end 322. The first through holes 34 and the The two through holes 36 are both connected to the shaft hole 32, the four first through holes 34 are arranged opposite to each other and are respectively arranged in the two first annular grooves 33, and the two second through holes 36 are arranged opposite to and located in the first ring groove 33. Two ring grooves 35, the third ring grooves 37 are respectively provided on both sides of the first and second ring grooves 33, 35, wherein the open end 321 is provided with a plug 39 so that both ends of the shaft hole 32 Closed. In other embodiments, both ends of the shaft hole 32 may be closed ends, and the plug 39 is omitted.

It should be noted that in this embodiment, the positions of the first through holes 34 approximately correspond to the two branch passages 18, and the positions of the second through holes 36 approximately correspond to the second air passage 25. In other embodiments, The number and positions of the first and second through holes 34, 36 can be changed. There are only two first through holes 34 and they are located in each of the first ring grooves 33, and the second through holes 36 only need to be At least one is located in the second annular groove 35, and the position of the first annular grooves 33 corresponds to the branch passages 18, and the position of the second annular groove 35 corresponds to the second air passage 25, so that gas can be held by the It is sufficient to transfer the two branch flow passages 18 of 10 to the second air passage 25 of the tool head 20.

In this embodiment, in order to prevent the gas from escaping from both sides of the first and second ring grooves 33, 35, there are six airtight rings 38 sleeved on the rod 31 of the rotating shaft 30, and the airtight The rings 38 are respectively accommodated in the third ring grooves 37 and abut the inner edges of the first pivot hole 19 and the second pivot hole 27 with their outer peripheral edges.

As shown in Fig. 7, it is a perspective view when the tool head 20 is swung to 60° with respect to the grip 10. In actual operation, gas passes through the main passage 17 and the second branch passage 18 of the first air passage 16 The two first annular grooves 33 and the two first through holes 34 enter the shaft hole 32, and then the gas flows from the shaft hole 32 through the second through hole 36 and the second annular groove 35 to the tool head 20 The second air passage 25 can drive the rotor 42 of the air motor 40 at the head 21 of the tool head 20. Since the air system flows through the first ring groove 33 to the two first through holes 34 and through the second ring groove 35 to the second air passage 25 of the tool head 20, no matter where the tool head 20 rotates to Angle, air can be smoothly supplied from the handle 10 to the air motor 40 of the tool head 20. Thereby, the pneumatic wrench 1 can flexibly adjust the angle of the tool head 20 according to user needs or construction site conditions, which not only improves the smoothness of use, but also adapts to various environments, especially small spaces, and greatly increases the tolerance of application occasions.

Based on the design spirit of the present invention, the structure of the pneumatic wrench 1 can have other changes, for example: the structure of the first air passage 16 can have other changes; or the tool head 20 can swing at an angle of -90 relative to the grip 10 °~90°; or the third ring groove 37 can be omitted, and the number of the airtight rings 38 can be changed; or the airtight rings 38 can also be omitted. All of these structural changes that can be easily thought of should be covered by the scope of the invention patent application.

1: pneumatic wrench 10: Grip 11: main body 13: Extension wall 15: card slot 16: first airway 17: Mainstream 18: Tributary 19: The first pivot hole L: axis 20: Tool head 21: head 23: neck 25: second airway 27: second pivot hole 29: output shaft 291: Axis 30: shaft 31: Rod body 32: Shaft hole 321: open end 322: closed end 33: The first ring groove 34: first through hole 35: second ring groove 36: second through hole 37: third ring groove 38: airtight ring 39: plug 40: Air motor 42: Rotor

Figure 1 is a perspective view of a pneumatic wrench according to a preferred embodiment of the present invention; Figure 2 is an exploded view of a pneumatic wrench according to a preferred embodiment of the present invention; Figure 3 is a cross-sectional view of the grip of a pneumatic wrench according to a preferred embodiment of the present invention; Figure 4 is a cross-sectional view of a tool head of a pneumatic wrench according to a preferred embodiment of the present invention; Figure 5 is a perspective view of the rotating shaft of a pneumatic wrench according to a preferred embodiment of the present invention; Figure 6 is a cross-sectional view of the rotating shaft of a pneumatic wrench according to a preferred embodiment of the present invention; Figure 7 is a perspective view of the tool head of a pneumatic wrench in different angles according to a preferred embodiment of the present invention.

1: pneumatic wrench

10: Grip

20: Tool head

29: output shaft

30: shaft

Claims (9)

A pneumatic wrench including: A grip with a main body, two extension walls extending from one end of the main body at intervals, a clamping groove is formed between the two extension walls, a first air passage is provided inside the main body and the two extension walls, And two first pivot holes pass through the two extension walls and communicate with the first airway; A tool head, including a head, a neck extending from the head and extending into the clamping groove, a second airway provided inside the head and the neck, and a second pivot hole through Is located at the neck and communicates with the second airway; and A rotating shaft penetrates the first pivot hole of the handle and the second pivot hole of the tool head, so that the tool head can swing relative to the handle, the rotating shaft has a rod body, and a shaft hole is arranged in the rod body Part, two first ring grooves are provided on the outer periphery of the rod body and corresponding to the two extension walls, a second ring groove is provided on the outer periphery of the rod body and positions corresponding to the neck, and two first through holes are provided on the rod The body is located in the first ring groove, and a second through hole is provided in the rod body and is located in the second ring groove, the first through holes and the second through holes are both connected with the shaft hole, thereby, The first air passage of the handle communicates with the second air passage of the tool head through the first ring grooves, the first through holes, the shaft hole and the second through hole. The pneumatic wrench according to claim 1, further comprising a plurality of airtight rings sleeved on the shaft of the rotating shaft and located on both sides of the first ring groove and the second ring groove. The pneumatic wrench according to claim 2, wherein the rod body of the rotating shaft is provided with a plurality of third ring grooves for the airtight rings to be accommodated therein. The pneumatic wrench according to claim 1, wherein the shaft hole is recessed by one end of the rod body, one end of the shaft hole is an open end, the other end of the shaft hole is a closed end, and the open end is provided with a plug , In order to make the two ends of the shaft hole closed. The pneumatic wrench according to claim 1, wherein the extension direction of the shaft of the shaft is perpendicular to the extension direction of the main body of the grip. The pneumatic wrench according to claim 1, wherein the first air passage includes a main flow passage and two branch flow passages, the main flow passage extends in from one end of the main body, and the two branch flow passages communicate with the main flow passage and extend from the main body to The two extended walls. The pneumatic wrench according to claim 1, wherein the tool head includes an output shaft extending from the head. The pneumatic wrench according to claim 1, wherein the tool head can rotate at an angle of -90°~90° relative to the handle. The pneumatic wrench according to claim 8, wherein the angle of the tool head relative to the grip is -60°~60°.

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