TWM581967U - Front and back cover elements of pneumatic tool and pneumatic tool - Google Patents

Abstract

The present invention relates to a front cover assembly for a pneumatic tool, comprising a front cover and a rear cover. The front cover and the rear cover are disposed on a pivot line, the front cover includes at least one first air inlet and the air inlet, and the rear cover includes at least one second access. The at least one first air inlet and the air inlet and the at least one second air inlet and outlet air are misaligned and spaced apart from each other, and the at least one first air inlet and the air inlet and the at least one second air inlet and the air hole A gas supply source can be connected to each other; the present invention relates to a pneumatic tool comprising a tool body, a cylinder body, a rotor and the aforementioned front cover assembly.

Description

Front tool cover and pneumatic tools for pneumatic tools

This creation is about a front tool assembly and a pneumatic tool for a pneumatic tool.

Pneumatic tools are one of the common assembly tools used in general factories. They are used to tighten or loosen workpieces such as nuts and bolts, 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 portion. The shell portion includes a front housing and a rear housing. The rear housing houses the rotating mechanism, and the rear end of the rear housing is provided with an intake air flow. The rotating mechanism has a cylinder and a rotor housed in the cylinder, the cylinder is provided with an intake passage that communicates with the intake passage of the interior of the cylinder and the rear casing, and the intake passage can be The outside air is introduced into the cylinder and rotor of the rotating mechanism, and the rotor is rotated. Such a rotating mechanism as disclosed in TW287457, TWI403395, etc. belongs to this category.

However, conventional high-pressure gas discharge efficiency is relatively poor, and it is easy to accumulate high-pressure gas in the cylinder to affect the rotation of the rotor, which affects the smoothness of rotation.

Therefore, it is necessary to provide a novel and progressive pneumatic tool front back cover assembly and pneumatic tool to solve the above problems.

The main purpose of the present invention is to provide a front cover assembly and a pneumatic tool of a pneumatic tool, wherein at least one first inlet and outlet of a front cover and at least one second inlet and outlet of a rear cover both have the function of intake and exhaust, and enhance Smoothness when turning.

In order to achieve the above object, the present invention provides a front cover assembly for a pneumatic tool, comprising: a front cover and a rear cover, the front cover and the rear cover are disposed on an axis, the front cover includes at least one first access a venting hole, the rear cover includes at least one second air inlet and outlet air hole; the at least one first air inlet and the air hole and the at least one second air inlet and the air hole are arranged offset from each other along the axis line, which are arranged at intervals A first inlet and outlet port and the at least one second inlet and outlet port are respectively connected to a supply air source.

In order to achieve the above object, the present invention provides a front tool assembly for a pneumatic tool, which is disposed on a cylinder body, and the cylinder body defines a gas chamber for accommodating a rotor, and the cylinder body is at one end of the opposite end portions. Having at least one forward intake air flow passage, and the other end portion includes at least one reverse intake air flow passage, the at least one forward rotation intake flow passage and the at least one reverse intake air flow passage respectively communicating with the air chamber, The front and rear cover assemblies further include: a front cover disposed at one end of the cylinder body, including at least one first air inlet and outlet, the at least one first air inlet and outlet corresponding to and communicating with the at least one forward air intake flow path and the at least one reverse One of the first intake and outlet air passages is connected to a supply air supply source; a rear cover is disposed on the opposite end of the front cover of the cylinder body, and includes at least one second air inlet and outlet hole, The at least one second air inlet and outlet corresponding to and communicating with the at least one forward air intake flow channel and the at least one reverse air intake flow channel, the at least one second air inlet and outlet air holes are configured to communicate with the air supply source, the front The cover and the back cover are disposed on an axial line; View of the axis, the at least one first insertion hole and at least one second access hole about the shaft axis are arranged offset and spaced.

In order to achieve the above object, the present invention provides a pneumatic tool, comprising: a tool body, comprising a casing and a gas supply portion, the casing is provided with an inner circumferential surface, the inner circumferential surface enclosing an accommodation space, The housing defines an axial direction, the housing is disposed with a first intake air flow passage, a second intake air flow passage, and an exhaust gas flow passage connecting the air chamber and the outer portion, wherein the inner circumferential surface is provided with One of the first ring groove and the second ring groove are arranged in the axial direction, the first intake flow path is connected to the first ring groove, and the second intake flow path is connected to the second ring groove, the gas supply part And the housing is disposed in the axial direction, the air supply portion is provided with two air supply channels, and the two air supply channels respectively communicate with one of the first intake flow path and the second intake flow path. Each of the air flow passages is connected to a supply air source; a cylinder body is received in the housing, the cylinder main body enclosing a gas chamber, and the cylinder main body is provided with at least one forward air flow flow at one end portion of the opposite end portions The other end portion is provided with at least one reverse intake air flow passage, and the at least one forward rotation intake flow passage and the at least one reverse intake air flow passage respectively a gas chamber; a rotor eccentrically received in the air chamber; a front and rear cover assembly including a front cover and a rear cover, the front cover and the rear cover being disposed on an axial center, the front cover Including at least one first air inlet and outlet, the rear cover includes at least one second air inlet and outlet air, the at least one first air inlet and the air hole communicate with the at least one second air inlet and outlet air hole; the at least one first access is viewed toward the axis of the axis The air hole and the at least one second air inlet and outlet are arranged offset from each other around the axis line, and the at least one first air inlet hole and the at least one second air inlet hole are respectively connected to a supply air source, and the at least one first inlet and outlet The air hole communicates with the first ring groove, and the at least one second air inlet hole communicates with the second ring groove.

The structural features of the present invention and the intended effects thereof will be described by way of example only, but are not intended to limit the scope of the present invention.

Please refer to FIG. 1 to FIG. 11 , which shows a first preferred embodiment of the present invention. The front tool assembly 1 and the pneumatic tool 2 of the present pneumatic tool are provided in a cylinder body 3 , and the cylinder body 3 is round. The cylinder body 3 is provided with a gas chamber 30 for accommodating a rotor 4, and the cylinder body 3 is provided with at least one forward air inlet passage 31 at one end portion of the opposite ends, and the other end portion includes At least one reverse intake air passage 32, the at least one forward intake flow passage 31 and the at least one reverse intake flow passage 32 respectively communicate with the air chamber 30, the front and rear cover assembly 1 further including a front cover 10 and A rear cover 20.

The front cover 10 is disposed at one end of the cylinder main body 3, and includes at least one first air inlet and outlet hole 11 corresponding to and communicating with the at least one forward air intake flow path 31 and the at least one reverse rotation One of the air passages 32, the at least one first air inlet and outlet 11 is connected to a supply air source; the rear cover 20 is disposed on the opposite end of the cylinder body 3, and includes at least one second access The air hole 21 is open to the opposite sides of the rear cover 20, and the at least one second air inlet and outlet 21 corresponds to and communicates with the at least one forward intake air flow path 31 and the at least one reverse The other of the inlet air passages 32, the at least one second air inlet and outlet 21 is configured to communicate with the air supply source, and the front cover 10 and the rear cover 20 are disposed on a shaft line L1; in detail, the cylinder body The at least one forward intake air passage 31 and the at least one reverse intake air passage 32 are disposed at opposite ends of the cylinder main body 3 along the axis L1; toward the axis line L1, The at least one first air inlet and outlet 11 and the at least one second air inlet and outlet hole 21 are arranged offset from each other along the axis line L1; thereby, the A first inlet and outlet port 11 and the at least one second inlet and outlet port 21 respectively supply high-pressure gas for intake and exhaust, so that high-pressure gas flows into the gas chamber 30 to push the rotor 4 to rotate, and can be smoothly discharged, so high-pressure gas The air chamber 30 can be smoothly flowed into and discharged without accumulating in the air chamber 30 to improve the smoothness of the rotation of the pneumatic tool 2 and to output the torque densely; and to provide a structure with high strength; The elasticity of the first inlet and outlet holes 11 and the at least one second inlet and outlet port 21 is high.

One of the at least one first inlet and outlet port 11 and the at least one second inlet and outlet port 21 is a forward-introducing air hole and the other is a reverse-in hole. In detail, the high-pressure gas may be input from the at least one first air inlet and outlet 11 or the at least one second air inlet and outlet 21 to pass the high-pressure gas through the at least one forward air intake passage 31 or the at least one reverse air intake. The flow path 32 is configured to switch between positive and negative torque outputs. When one of the at least one first inlet and outlet port 11 and the at least one second inlet and outlet port 21 is an air inlet and outlet port, the other is a vent hole.

The number of the at least one first air inlet and outlet 11 is two, and the number of the at least one second air inlet and outlet holes 21 is two. Preferably, the two first inlet and outlet air holes 11 are diagonally disposed, and the two second air inlet and outlet air holes 21 are diagonally disposed; the at least one forward air inlet flow path 31 and the at least one reverse air intake flow path 32 are The number of the first inlet and outlet holes 11 and the second inlet and outlet ports 21 is matched. Furthermore, as viewed from the axis L1, the two first inlet and outlet holes 11 and the two second inlet and outlet ports 21 are staggered around the axis line L1 to increase the output torque. In other embodiments, as shown in FIG. 12, the number of the at least one first air inlet and outlet 11 and the at least one second air inlet and outlet hole 21 may be one.

At least the front cover 10 or the rear cover 20 is provided with a peripheral surface 12, 22 extending around the axis line L1, and the outer peripheral surface is provided with a guiding groove 15, 24 communicating with the air supply source, the guiding groove is facing The flow guiding groove communicates with each of the first inlet and outlet holes 11 or each of the second inlet and outlet holes 21 . In the present embodiment, the front cover 10 and the rear cover 20 are respectively provided with the outer peripheral surfaces 12, 22. Each of the first air inlet and outlet holes 11 is provided with a first opening 13 and a radial opening which are open toward the axis line L1. The second opening and opening 14 provided in the guiding groove 15 has the same structure as each of the first inlet and outlet holes 11; in detail, the guiding groove 15 of the front cover 10 is connected The two first inlet and outlet holes 11 communicate with the second inlet and outlet holes 21 of the rear cover 20; thus, the high pressure gas can be input and exhausted in the radial direction, and the high pressure gas can flow in a concentrated manner.

Preferably, at least the front cover 10 or the rear cover 20 is provided with at least one airtight ring portion 40, and each of the airtight ring portions 40 and the guiding grooves 15, 24 are arranged on the axis line L1. The outer ring portion 40 radially protrudes the outer peripheral surface 12, 22. Preferably, the number of the at least one airtight ring portion 40 is two; for example, the rear cover 20 is disposed between the two airtight ring portions 40 so that the high pressure gas is not caused by the front cover 10 And the gap between the rear cover 20 and the casing 6 of the pneumatic tool 2 flows out to have a better sealing effect to maintain the pressure of the gas. It is to be noted that the guiding groove 13 of the front cover 10 and the airtight ring portion 40 are disposed in the same manner as the rear cover 20; each of the airtight ring portions 40 includes a ring groove 41 and a ring groove 41 therein. The airtight ring 42 radially protrudes from the annular groove 41 to improve the positioning effect; further indicating that the number of the at least one airtight ring portion 40 can be changed according to requirements.

Referring to FIG. 13 and FIG. 14, a third preferred embodiment of the present invention is shown, which differs from the first preferred embodiment in that the rear cover 20' is provided with an end surface on the axis L1. The end surface is provided with a flow guiding groove 24'. In the present embodiment, the front cover 10' and the rear cover 20' are each provided with the end faces 16, 25. Taking the cover 20' as an example, the guide groove 24' of the rear cover 20' communicates with each of the second air inlet and outlet holes 21 and the air supply source, and the relative direction of each of the second air inlet and outlet holes 21 toward the thickness of the rear cover 20' The two sides are open and open, and the position of each of the second air inlet and outlet holes 21 corresponds to the position of the flow guiding groove 24; the guiding groove 15' of the front cover 10' and the arrangement of each of the first air inlet and outlet holes 11 and the rear cover 20 Each of the second air outlets 21 is disposed in the same manner as the flow guiding grooves 24', so that the high pressure gas can be input and discharged into the air chamber 30 in the axial direction.

The present invention further provides a pneumatic tool 2 comprising a front tool assembly 1 of the pneumatic tool 2 as described above, the pneumatic tool 2 further comprising a tool body 5, the cylinder body 3 and the rotor 4.

The rotor 4 is eccentrically housed in the plenum 30. The tool body 5 includes a housing 6 and an air supply portion 7. The housing 6 is provided with an inner circumferential surface 61. The inner circumferential surface 61 defines an accommodating space 62. The housing 6 defines an axial direction L2. The housing 6 is provided with a first intake air flow passage 63, a second intake air flow passage 64, and an exhaust gas flow passage 67 communicating with the air chamber 30 and the outside. The inner circumferential surface 61 is provided with an axial direction. One of the first ring groove 65 and the second ring groove 66 is disposed on the L2. The first intake flow path 63 communicates with the first ring groove 65, and the second intake flow path 64 communicates with the second ring groove. 66, the air supply portion 7 and the casing 6 are disposed in the axial direction L2, the air supply portion 7 is provided with two air supply passages 71, 72, and the two air supply passages 71, 72 are respectively connected to the first air intake One of the flow path 63 and the second intake flow path 64, in detail, the supply air flow path 71 communicates with the first intake air flow path 63, and the supply air flow path 72 communicates with the second intake air flow path 64, The two air supply passages 71, 72 are each connected to a supply air source, and the switching air supply source can be selected to be introduced into the two air supply passages 71, 72; the cylinder main body 3 is received in the housing 6; the at least one An air inlet and outlet 11 communicates with the first ring groove 65, the at least one The two air inlet and outlet holes 21 communicate with the second ring groove 66 to provide a simple structure and a small volume to switch the positive and reverse torque output, improve the smoothness of the rotation of the pneumatic tool and the dense output torque. In detail, the high pressure gas is mainly discharged from the exhaust flow path 67, and the remaining is discharged from the first intake flow path 63 or the second intake flow path 64.

In summary, a pneumatic tool of the present invention provides high-pressure gas intake and exhaust through the at least one first inlet and outlet and the at least one second inlet and outlet, respectively, so that high-pressure gas flows into the chamber to push the rotor to rotate. It can be discharged smoothly, so the high-pressure gas can smoothly flow into and out of the air chamber without accumulating in the air chamber, so as to improve the smoothness of the rotation of the pneumatic tool and the output torque.

1‧‧‧ front and rear cover assemblies

10, 10’‧‧‧ front cover

11‧‧‧First access hole

12, 22‧‧‧ outer perimeter

13‧‧‧First opening

14‧‧‧second opening

15, 15’, 24, 24’‧‧

16, 25‧‧‧ end face

20, 20’ ‧ ‧ back cover

21‧‧‧Second access hole

2‧‧‧ pneumatic tools

3‧‧‧Cylinder body

30‧‧‧ air chamber

31‧‧‧ Forwarding intake runner

32‧‧‧Reverse intake runner

4‧‧‧Rotor

40‧‧‧Airtight ring

41‧‧‧ Ring groove

42‧‧‧ airtight ring

5‧‧‧Tool body

6‧‧‧Shell

61‧‧‧ inner circumference

62‧‧‧ accommodating space

63‧‧‧First intake runner

64‧‧‧Second intake runner

65‧‧‧First ring groove

66‧‧‧second ring groove

67‧‧‧Exhaust runner

7‧‧‧Air Supply Department

71, 72‧‧‧Air supply channel

L1‧‧‧ axis line

L2‧‧‧ axial

1 is a perspective view of a first preferred embodiment of the present invention.  Figure 2 is an exploded view of a first preferred embodiment of the present invention.  Figure 3 is another exploded view of a first preferred embodiment of the present invention.  Figure 4 is a cross-sectional view taken along line A-A of Figure 1.  Figure 5 is a cross-sectional view taken along line C-C of Figure 4;  Figure 6 is a cross-sectional view taken along line D-D of Figure 4.  Figure 7 is an axial partial perspective view of a first preferred embodiment of the present invention.  Figure 8 is a cross-sectional view taken along line B-B of Figure 1.  Figure 9 is a cross-sectional view taken along line E-E of Figure 8.  Figure 10 is a perspective view of a housing of a first preferred embodiment of the present invention.  Figure 11 is a perspective view of a front cover of a first preferred embodiment of the present invention.  Figure 12 is an axial partial perspective view of a second preferred embodiment of the present invention.  Figure 13 is a perspective view of a third preferred embodiment of the present invention.  Figure 14 is a cross-sectional view showing the state of use of a third preferred embodiment of the present invention.  

Claims (10)

The front cover assembly of the pneumatic tool comprises: a front cover and a rear cover, wherein the front cover and the rear cover are disposed on an axial center, the front cover includes at least one first air inlet and the air inlet, and the rear cover includes at least one a second air inlet and outlet hole, and at least one first air inlet and outlet air hole and the at least one second air inlet and outlet air hole are arranged offset from each other around the axis line, the at least one first air inlet and the air hole and the at least one The second inlet and outlet holes are respectively connected to a supply air source. The front cover assembly of the pneumatic tool is disposed on a cylinder body, and the cylinder body defines a gas chamber for accommodating a rotor, wherein the cylinder body is provided with at least one forward air inlet at one end of the opposite ends The flow passage and the other end portion are provided with at least one reverse intake air flow passage, and the at least one forward rotation intake flow passage and the at least one reverse intake air flow passage respectively communicate with the air chamber, and the front and rear cover assembly further includes:  a front cover disposed at one end of the cylinder body, including at least one first air inlet and outlet, the at least one first air inlet and outlet corresponding to and communicating with the at least one forward air intake flow channel and the at least one reverse air intake flow channel In one case, the at least one first air inlet and outlet are connected to a gas supply source;  a rear cover, the opposite end portion of the front cover is disposed on the cylinder body, and includes at least one second air inlet and outlet, the at least one second air inlet and outlet corresponding to and communicating with the at least one forward air intake flow path and the at least one Reversing the other of the intake flow passages, the at least one second inlet and outlet air holes are configured to communicate with the air supply source, the front cover and the rear cover are disposed on an axial line; toward the axis of the axis, the at least one The first air inlet and the air inlet and the at least one second air inlet and outlet air holes are offset and arranged at intervals around the axis line.   The front tool assembly of the pneumatic tool of claim 1 or 2, wherein the number of the at least one first air inlet and outlet holes is two, and the number of the at least one second air inlet and outlet air holes is two. The front tool assembly of the pneumatic tool of claim 3, wherein the two first inlet and outlet air holes are diagonally disposed, and the two second air inlet and outlet air holes are diagonally disposed. The front tool assembly of the pneumatic tool of claim 3, wherein the two first inlet and outlet holes and the two second inlet and outlet air holes are staggered around the axis line. The front tool assembly of the pneumatic tool of claim 3, wherein at least the front cover or the rear cover is provided with an outer circumferential surface extending around the axial line, and the outer circumferential surface is provided with a guiding groove connecting the air supply source. The guiding groove is open to the radial direction, and the guiding groove communicates with each of the first inlet and outlet holes or each of the second inlet and outlet holes. The front cover assembly of the pneumatic tool according to claim 6, wherein at least the front cover or the rear cover is provided with at least one airtight ring portion, and each of the airtight ring portions and the guide groove are arranged on the axial line, each of which is disposed The airtight ring portion radially protrudes from the outer peripheral surface. The front cover assembly of the pneumatic tool of claim 3, wherein the rear cover is provided with an end surface on the axial line, the end surface is provided with a guiding groove; the guiding groove of the rear cover is connected to each of the second inlet and outlet holes and The air supply source, each of the second air inlet and outlet holes is open to the opposite sides of the thickness direction of the rear cover, and the position of each of the second air inlet and outlet holes corresponds to the position of the flow guiding groove. The front tool assembly of the pneumatic tool of claim 6, wherein the two first air inlet and outlet air holes are diagonally disposed, and the two second air inlet and outlet air holes are diagonally disposed; toward the axis of the shaft, the two first access points are The air hole and the two second air inlet and outlet holes are staggered around the axis line; the front cover and the back cover are respectively provided with the outer peripheral surface, and each of the first air inlet and outlet holes is provided with a first opening open to the axis line and a first opening a second opening that is open in the radial direction and is disposed in the flow guiding groove. The structure of each of the second air inlet and outlet holes is the same as that of each of the first air inlet and outlet holes; the number of the at least one airtight ring portion is two, and the guiding channel is provided Between the two airtight ring portions, each of the airtight ring portions includes a ring groove and an airtight ring disposed in the ring groove, and the airtight ring portion radially protrudes from the ring groove. A pneumatic tool comprising:  a tool body includes a casing and a gas supply portion, the casing is provided with an inner circumferential surface, the inner circumferential surface enclosing an accommodation space, the casing defines an axial direction, and the casing is provided with a first An inlet air passage, a second intake passage, and an exhaust passage communicating with the air chamber and the outer portion, wherein the inner circumferential surface is provided with a first ring groove and a second ring arranged at intervals in the axial direction a first intake air passage communicating with the first annular groove, the second intake flow passage communicating with the second annular groove, the air supply portion and the housing being disposed in the axial direction, the air supply portion being provided a two air supply passages, each of the two air supply passages communicating with the first intake air flow passage and the second intake air flow passage, wherein the two air supply passages are each connected to a supply air source;  a cylinder body is disposed in the casing, the cylinder body enclosing a gas chamber, wherein the cylinder body is provided with at least one forward-rotating intake flow passage at one end portion of the opposite ends, and at least one opposite end at the other end portion The intake air flow passage, the at least one forward intake air flow passage and the at least one reverse intake air flow passage respectively communicate with the air chamber;  a rotor eccentrically received in the air chamber;  A front and rear cover assembly includes a front cover and a rear cover. The front cover and the rear cover are disposed on a pivot line. The front cover includes at least one first air inlet and outlet, and the rear cover includes at least one second air inlet and outlet. The at least one first air inlet and outlet communicates with the at least one second air inlet and outlet air hole; the at least one first air inlet and the air hole and the at least one second air inlet and the air hole are misaligned and arranged at intervals around the axis line. The at least one first air inlet and the air inlet and the at least one second air inlet and outlet are respectively connected to a supply air source, the at least one first air inlet and the air hole communicate with the first ring groove, and the at least one second air inlet and the air hole communicate with the second Ring groove.