TWM530210U - Pneumatic machine tool - Google Patents

Description

Pneumatic machine tool

The present invention relates to a pneumatic machine tool, and more particularly to a pneumatic machine tool that allows at least one buffer spoiler to smoothly flow high-speed high-pressure gas.

Press, the pneumatic grinder is a polished hand-held machine that uses air pressure as a driving source, and most of them are used to polish or grind surfaces such as metal or wood. For example, the M295556 patent of the Republic of China Patent Publication discloses a pneumatic polishing grinder having a casing, a cylinder, a transmission shaft, a grinding wheel and a pneumatic wheel. The housing has a chamber, an air inlet duct and an air outlet duct, and the air inlet duct is connected to the air outlet duct to the chamber. The cylinder is disposed in the chamber, the cylinder has a gas chamber having a cross-sectional area smaller than the chamber, an air inlet passage connecting the air chamber and the air inlet duct, and a chamber opened in the cylinder and communicating with the air chamber and the chamber The air outlet of the chamber, and the cross-sectional area of the air chamber is smaller than the cross-sectional area of the chamber. The transmission shaft is driven out of the air chamber to the outside of the housing, the grinding wheel is disposed on a side of the transmission shaft away from the housing, and the pneumatic wheel sleeve is disposed on a side of the transmission shaft in the air chamber. Further, when the pneumatic polishing grinder is in practical application, high-speed high-pressure gas flows into the air chamber from the air intake duct and drives the pneumatic wheel to rotate, and the pneumatic wheel rotates the grinding wheel through the transmission shaft. In this way, the user can bring the rotating grinding wheel close to an object surface (for example, metal or wood, etc.) for grinding and polishing. Wherein, high-speed high-pressure gas passes through the air outlet to flow out from the air chamber to the chamber (ie, the gap between the housing and the cylinder), and then flows out of the chamber to the air outlet duct, thus, The pneumatic polishing machine continuously sucks in and discharges high-speed high-pressure gas, and continuously drives the grinding wheel to rotate to facilitate the grinding operation.

However, since the high-speed high-pressure gas continuously flows toward the gas outlet pipe when flowing in the chamber, the high-speed high-pressure gas in the chamber is blocked in the gas outlet pipe and cannot be discharged, thereby making it difficult for the high-speed high-pressure gas to be discharged by the gas. A duct enters the air chamber to drive the pneumatic wheel to rotate.

The main purpose of this creation is to solve the problem that the high-speed high-pressure gas in the conventional embodiment cannot smoothly drive the rotation of the pneumatic device.

In order to achieve the above object, the present invention provides a pneumatic machine tool comprising a machine tool housing, a chamber defined by the machine tool housing, and a pneumatic mechanism disposed in the chamber, the machine tool housing having An air intake passage and an air outlet passage respectively communicating with the chamber, wherein the pneumatic power tool has a cylinder disposed in the chamber and is formed between the cylinder and the chamber to communicate with the air outlet passage a venting gap, the cylinder has a space for providing the pneumatic mechanism, an air inlet opening connecting the space and the air inlet passage, and at least one air outlet connecting the space and the ventilation gap, and the pneumatic machine tool has And at least one buffering spoiler disposed on the side of the cylinder facing the venting gap or the chamber facing the venting gap side.

In one embodiment, the pneumatic mechanism has a pneumatic wheel that is driven to rotate by high-speed, high-pressure gas, and a drive shaft that is pivotally mounted to the pneumatic wheel and that exits to the outside of the machine tool housing. Further, the pneumatic power tool further has an application tool mounted on a side of the transmission shaft away from the machine tool housing.

In one embodiment, the drive shaft has an assembly portion that is external to the machine tool housing and is provided with the application tool, and the axis of the application tool is on the same axis as the shaft center of the transmission shaft.

In one embodiment, the drive shaft has an assembly portion that is external to the machine tool housing and is provided with the application tool. The axis of the application tool and the axis of the transmission shaft are on different axes.

In an embodiment, the cylinder further has an auxiliary spoiler adjacent to the air outlet and facing the ventilation gap.

In one embodiment, the pneumatic power tool further has a weight disposed on the drive shaft to increase the overall rotational speed and torque of the drive shaft.

In one embodiment, the application tool is a grinding wheel or a polishing wheel. Further, the pneumatic power tool further has a dust cover surrounding the periphery of the application tool.

Through the above embodiments of the present creation, the following features are compared with the conventional ones:

The air working machine has at least one buffering spoiler disposed on a side of the cylinder facing the venting gap or at a side of the chamber facing the venting gap to make the venting gap The high-speed high-pressure gas that has not been discharged from the outlet passage may cause a decrease in the flow velocity due to a change in the cross-sectional area between the buffer spoiler and the venting gap, so as to avoid the venting gap. The high-speed high-pressure gas flows too fast to the vicinity of the air outlet, so that the high-speed high-pressure gas in the space cannot be smoothly discharged from the air outlet, thereby solving the problem that the high-speed high-pressure gas cannot smoothly rotate the pneumatic device in the conventional embodiment.

The detailed description and technical content of this creation are described below with the following diagram:

Referring to FIG. 1 to FIG. 5 , the present invention provides a pneumatic power tool 1 . The specific configuration of the pneumatic power tool 1 includes a machine tool housing 11 , a chamber 12 defined by the machine tool housing 11 , and a setting. A pneumatic mechanism 13 in the chamber 12 and a cylinder 14 disposed in the chamber 12. The power tool housing 11 has an air inlet passage 111, an air outlet passage 112, and an end plate 113. The air inlet passage 111 and the air outlet passage 112 communicate with the chamber 12, respectively, and the pneumatic mechanism 13 and the cylinder 14 are It is confined within the chamber 12 through the end plate 113. In detail, the pneumatic machine tool 1 can be a machine tool driven by high-speed high-pressure gas (the machine tool can be a grinder or a grinder, etc.), and the pneumatic machine tool 1 has an application tool 15 (such as a grinding wheel). Or a grinding wheel, etc., and the pneumatic mechanism 13 has a pneumatic wheel 131 driven by high-speed high-pressure gas and a shaft connected to the pneumatic wheel 131 and passed out to the outside of the machine tool housing 11 for mounting the utility tool 15 The drive shaft 132 is configured such that the pneumatic wheel 131 can be rotated by the high speed and high pressure gas to rotate the application tool 15 through the transmission shaft 132.

On the other hand, a venting gap 16 is formed between the cylinder 14 and the chamber 12 in communication with the outlet passage 112. Specifically, the venting gap 16 does not refer to a region adjacent to the venting opening 143 (as shown in FIG. 5), which is referred to as an annular space formed between the cylinder 14 and the chamber 12. Furthermore, the cylinder 14 has a space 141 for providing the pneumatic mechanism 13, an air inlet 142 communicating with the space 141 and the air inlet passage 111, and at least one air outlet communicating with the space 141 and the ventilation gap 16. 143. The pneumatic power tool 1 has at least one buffer spoiler 114, 144 disposed on a side of the cylinder 14 facing the ventilation gap 16 or at least one of the chamber 12 facing the ventilation gap 16 side. That is, the pneumatic power tool 1 can have at least one buffer spoiler 144 (shown in FIG. 5) disposed on a side of the cylinder 14 facing the venting gap 16; At least one of the buffer spoiler 114 (shown in FIG. 6) on one side of the venting gap 16 or at least one of the buffer turbulence slots 144 disposed on a side of the cylinder 14 facing the venting gap 16 The chamber 12 faces at least one of the buffer spoilers 114 on the side of the venting gap 16 (as shown in FIG. 7). Accordingly, in order to clearly illustrate the embodiment of the present invention, the following first embodiment of the pneumatic machine tool 1 having at least one of the buffer spoilers 144 disposed on the side of the cylinder 14 facing the venting gap 16 is performed. Description of the overall implementation.

Further, please refer to FIG. 2 to FIG. 5 together. When the pneumatic power tool 1 is used in practice, the air inlet passage 111 is connected to an air compressor (not shown), and then through the air compressor. A high-speed high-pressure gas is input to the intake passage 111. In detail, a high-speed high-pressure gas passes through the air inlet 142 to enter the space 141 and drives the pneumatic wheel 131 to rotate, so that the pneumatic wheel 131 drives the application tool through the transmission shaft 132. 15 is rotated, so that the user can perform a predetermined operation (such as grinding or cutting) on an item (not shown) through the rotating application tool 15. Further, after the high-speed high-pressure gas completes the driving operation of the pneumatic mechanism 13, the high-speed high-pressure gas passes through the air outlet 143 and enters the ventilation gap 16 from the space 141, and is discharged from the ventilation gap 16 to the air outlet passage 112. The high-speed high-pressure gas provided by the air compressor can be continuously input into the chamber 12 from the intake passage 111 to drive the pneumatic mechanism 13 to rotate.

In detail, the pneumatic power tool 1 has at least one buffering spoiler disposed on a side of the cylinder 14 facing the venting gap 16 or at least one of the chamber 12 facing the venting gap 16 side. The slots 114 and 144 are such that high-speed high-pressure gas that has not been discharged from the air outlet passage 112 in the venting gap 16 flows through the buffer turbulence slots 114 and 144, and the high-speed high-pressure gas is caused by the buffer turbulence slots 114 and 144. The cross-sectional area between the venting gaps 16 changes to cause a decrease in the flow rate, thereby preventing the high-speed high-pressure gas in the venting gap 16 from flowing too fast to the vicinity of the venting opening 143, thereby causing high-speed high-pressure gas in the space 141 to be prevented. The air outlet 143 is smoothly discharged, so that high-speed high-pressure gas can be smoothly flowed from the air inlet passage 111, the chamber 12 and the air outlet passage 112 to drive the pneumatic mechanism 13 to actuate, thereby lifting the pneumatic mechanism 13 The rotational speed and the rotational strength are such that the pneumatic mechanism 13 can drive the application tool 15 of a larger size, thereby solving the problem that the high-speed high-pressure gas in the conventional embodiment cannot smoothly drive the rotation of the pneumatic device.

In order to further increase the operational smoothness of the pneumatic mechanism 13, in an embodiment, the cylinder 14 further has an auxiliary spoiler 145 adjacent to the air outlet 143 and facing the ventilation gap 16 (as shown in the figure). 2, the auxiliary spoiler 145 and the buffer spoiler 144 are different from each other in position so that high-speed high-pressure gas flows through the air outlet 143 to the auxiliary spoiler 145 due to the air outlet. 143 and the auxiliary spoiler 145 change the cross-sectional area to cause a decrease in the flow rate to prevent the high-speed high-pressure air in the space 141 from flowing too fast to the outlet passage 112 and the high-speed high-pressure air in the ventilation gap 16 to generate each other. The disturbance condition, according to which, the high-speed high-pressure gas can be smoothly flowed from the intake passage 111, the chamber 12, and the outlet passage 112 to drive the pneumatic mechanism 13 to operate. In particular, the pneumatic power tool 1 can not reduce the overall thickness of the cylinder 14 except that the buffer spoiler 144 and the auxiliary spoiler 145 can be disposed on the surface of the cylinder 14 . At least one spoiler (such as the buffer spoiler 144 or the auxiliary spoiler 145) is recessed anywhere on the surface of the cylinder 14 to adjust the cylinder 14 while maintaining a certain structural strength. The flow rate of the high-speed high-pressure gas in the chamber 12 is such that high-speed high-pressure gas can smoothly enter the chamber 12 from the intake passage 111 to drive the pneumatic mechanism 13, thereby optimizing the rotational speed of the pneumatic mechanism 13. Specifically, it should be noted that the air ramming machine 1 is recessed in one of the cylinders 14 or the chamber 12, and the buffer turbulence slots 114, 144 are not merely referred to the cylinder 14 or the chamber 12 thereof. One of the cylinders 14 or the one of the chambers 12 is provided with at least one spoiler (not shown). In other words, the pneumatic machine tool 1 only needs to provide at least one component that can form a step difference in one of the cylinder 14 or the chamber 12, so that high-speed high-pressure air flows through the passage. It is sufficient that the cross-sectional area changes to cause a decrease in the flow rate.

Further, in order to enhance the rotational speed of the pneumatic mechanism 13, in an embodiment, as shown in FIG. 2, the pneumatic power tool 1 can further have a weight 17 mounted on the transmission shaft 132. The transmission shaft 132 can transmit centrifugal force generated by the rotation of the weight 17 when the pneumatic wheel 131 rotates in conjunction to increase the speed and torque of the transmission shaft 132 to rotate the utility tool 15.

In addition, it can be clearly seen from the foregoing that the pneumatic power tool 1 of the present invention can be a power tool driven by high-speed high-pressure gas. For example, as shown in FIG. 1 and FIG. 2, the application tool 15 can be a grinding wheel (disc) or a polishing wheel (disc), and the pneumatic machine tool 1 further has a dust cover 18 surrounding the periphery of the application tool 15 to prevent dust generated by the pneumatic machine tool 1 from penetrating into the Inside the chamber 12 and causing trouble to the user's eyes. Further, the drive shaft 132 has an assembly portion 133 located outside the machine tool housing 11 and provided for the application tool 15, as shown in FIG. In detail, the mounting portion 133 can be an eccentric shaft seat, such that the application tool 15 is disposed on the mounting portion 133, and the axis of the application tool 15 and the axis of the transmission shaft 132 are on different axes. The rotational speed is increased by the centrifugal force generated by the rotation of the operating shaft 15 when the drive shaft 132 is rotated. In addition, the mounting portion 133 can also be a shaft seat, so that after the application tool 15 is mounted on the mounting portion 133, the axis of the application tool 15 and the axis of the transmission shaft 132 are on the same axis, thereby increasing The stability of the moving shaft 132 when rotating.

In summary, the pneumatic power tool comprises a machine tool housing, a chamber defined by the machine tool housing and a pneumatic mechanism disposed in the chamber. The machine tool housing has an air inlet passage and an air outlet passage respectively communicating with the chamber. Furthermore, the pneumatic machine tool has a cylinder disposed in the chamber and a venting gap formed between the cylinder and the chamber to communicate with the air outlet passage, and the cylinder has a pneumatic mechanism for providing The space, an air inlet opening connecting the space and the air inlet passage, and at least one air outlet connecting the space and the ventilation gap. Wherein the pneumatic machine tool has at least one buffering spoiler disposed on a side of the cylinder facing the venting gap or at a side of the chamber facing the venting gap, so that the venting gap has not yet been When the high-speed high-pressure gas discharged from the air outlet passage flows through the buffer spoiler, a flow velocity decreases due to a change in a sectional area between the buffer spoiler and the ventilation gap, thereby avoiding a high speed in the ventilation gap. The high-pressure gas flows too fast to the adjacent area of the air outlet, so that the high-speed high-pressure gas in the space cannot be smoothly discharged from the air outlet, so that the high-speed high-pressure gas can be made from the air inlet passage, the chamber, and the The outlet passage flows smoothly to drive the pneumatic mechanism to actuate.

The above description has been made in detail, but the above is only a preferred embodiment of the present invention, and it is not possible to limit the scope of the creation of the creation, that is, the equality of the patent application scope according to the present creation. Changes and modifications are still covered by the patents of this creation.

1‧‧‧Pneumatic machine tool
11‧‧‧Tool machine housing
111‧‧‧Intake passage
112‧‧‧Exhaust passage
113‧‧‧End board
114‧‧‧buffering chute
12‧‧‧ chamber
13‧‧‧Pneumatic mechanism
131‧‧‧Pneumatic wheel
132‧‧‧ drive shaft
133‧‧‧Assembly Department
14‧‧‧ cylinder
141‧‧‧ space
142‧‧‧Air intake
143‧‧‧ Vents
144‧‧‧buffering chute
145‧‧‧Assisted spoiler
15‧‧‧Application Tools
16‧‧‧ Ventilation gap
17‧‧‧weights
18‧‧‧ dust cover

Figure 1. A perspective view of the creation. Fig. 2 is an exploded perspective view showing the first embodiment of the present creation. Fig. 3 is a schematic cross-sectional view showing the first embodiment of the present invention. Figure 4 is a side cross-sectional view showing the first embodiment of the present invention. Fig. 5 is a partial plan sectional view showing the first embodiment of the present invention. Fig. 6 is a partial plan sectional view showing the second embodiment of the present invention. Fig. 7 is a partial plan sectional view showing the third embodiment of the present invention.

1‧‧‧Pneumatic machine tool

11‧‧‧Tool machine housing

111‧‧‧Intake passage

112‧‧‧Exhaust passage

113‧‧‧End board

13‧‧‧Pneumatic mechanism

131‧‧‧Pneumatic wheel

132‧‧‧ drive shaft

133‧‧‧Assembly Department

14‧‧‧ cylinder

141‧‧‧ space

142‧‧‧Air intake

143‧‧‧ Vents

144‧‧‧buffering chute

145‧‧‧Assisted spoiler

15‧‧‧Application Tools

17‧‧‧weights

18‧‧‧ dust cover

Claims (9)

A pneumatic machine tool includes a machine tool housing, a chamber defined by the machine tool housing, and a pneumatic mechanism disposed in the chamber, the machine tool housing having an air inlet respectively communicating with the chamber a passage and an outlet passage, characterized in that: the pneumatic machine tool has a cylinder disposed in the chamber and a ventilation gap formed between the cylinder and the chamber and communicating to the outlet passage, the cylinder having a supply a space into which the pneumatic mechanism is placed, an air inlet opening connecting the space and the air inlet passage, and at least one air outlet connecting the space and the ventilation gap, and the pneumatic machine tool is disposed on the cylinder facing the ventilation gap One side or the chamber faces at least one buffer spoiler of at least one of the sides of the venting gap. The pneumatic power tool of claim 1, wherein the pneumatic mechanism has a pneumatic wheel that is driven to rotate by high-speed high-pressure gas, and a transmission shaft that is coupled to the pneumatic wheel and that passes out to the outside of the machine tool housing. The pneumatic power tool of claim 2, wherein the pneumatic power tool further has an application tool mounted on a side of the drive shaft away from the machine housing. The pneumatic power tool according to claim 3, wherein the drive shaft has a fitting portion located outside the machine tool housing and provided for the application tool, and the axis of the application tool is located at the axis of the drive shaft On the same axis. The pneumatic power tool of claim 3, wherein the drive shaft has a fitting portion located outside the machine tool housing and provided for the application tool, the axis of the application tool and the axis of the drive shaft being located On different axes. The pneumatic power tool of claim 1, 2, 3, 4 or 5, wherein the cylinder further has an auxiliary spoiler adjacent to the air outlet and facing the venting gap. The pneumatic power tool of claim 2, 3, 4 or 5, wherein the pneumatic power tool further has a weight mounted on the drive shaft to increase the overall rotational speed and torque of the drive shaft. A pneumatic machine tool according to claim 3, 4 or 5, wherein the application tool is a grinding wheel or a polishing wheel. The pneumatic power tool of claim 8, wherein the pneumatic power tool further has a dust cover surrounding the periphery of the application tool.