TWM507830U - Multi-stage exhaust device - Google Patents

Description

Multi-stage exhaust

The present invention relates to an exhaust device, and more particularly to a multi-stage exhaust device for use in a pneumatic tool.

The advancement of technology has led to the development of technology. Various power tools or automated tools have replaced traditional hand tools, which are widely used in life and enhance the convenience of human society. The pneumatic tools use the pressure of the air to bring the motives. The common pneumatic tools on the market include wrenches and screwdrivers, etc., mainly using pneumatic tools to stabilize the output torque to drive the components to rotate, saving time and effort.

Since the pneumatic tool drives the tool to operate by the high-pressure gas that is supplied, there is a problem of exhaust. A silencer for a pneumatic tool is disclosed in Taiwan Patent Publication No. M277562. An exhaust hood having a plurality of vent holes is disposed outside a venting groove of the tool, and a sound absorbing body is disposed on the venting groove. In addition, a structure for noise elimination of a pneumatic tool is mentioned in Taiwan Patent Publication No. M393399. A diffusion groove, a flow guiding groove and a venting groove are provided on the tool body, and an exhaust hood is provided on the tool body. In the above previous cases, there is only one exhaust mode, and the exhaust hood will have a difference in the output value due to the difference in positioning when the hood is rotated by 360 degrees. In addition, the rotation of the hood is only exhausted. Since the effect of the change is made, the adjustment of the exhaust hood does not have the effect of adjusting the torque.

In view of this, how to reduce the noise when the pneumatic tools are exhausted, And can be adjusted with the torque of the pneumatic tools, and become the goal of the relevant industry.

The utility model provides a multi-stage exhaust device, which can select different displacements for different operation modes, so that the pneumatic tool can achieve the effect of exhaust muffing in the small torque output mode; and the pneumatic tool is in the high torque output mode. When the gas is quickly discharged, the torque is reduced.

According to an embodiment of the present invention, a multi-stage exhaust device includes a row of cylinder blocks, a regulating ring and an exhaust ring. The exhaust cylinder block comprises a plurality of through holes, the control ring is arranged outside the exhaust cylinder block and has a plurality of exhaust holes, the exhaust ring is sleeved on the outer side of the control ring and the exhaust ring comprises a plurality of openings, and the exhaust ring has relative regulation a first exhaust position of the ring and a second exhaust position. When the exhaust ring is in the first exhaust position, the opening has a first exhaust amount relative to the exhaust hole, and when the exhaust ring is located at the second exhaust position, the opening has a second exhaust amount relative to the exhaust hole, first The amount of exhaust is different from the amount of second exhaust. Thereby, through the arrangement of the exhaust ring and the control ring, the position of the exhaust ring can be adjusted to select different exhaust amounts, thereby achieving the purpose of multi-stage exhaust muffling.

According to the multi-stage exhaust device, a part of the exhaust hole may constitute a first exhaust zone, and another part of the exhaust hole may constitute a second exhaust zone, the first exhaust zone being opposite to the first exhaust zone The opening has a first exhaust amount, the second exhaust region has a second exhaust amount relative to the opening, and the first exhaust amount may be greater than the second exhaust the amount. The multi-stage exhaust device may further include a first muffler and a second muffler. The first muffler is disposed between the control ring and the exhaust cylinder, and the second muffler is disposed on the control ring and the exhaust. Between the rings, the second muffler can be further opposite the opening at the second exhaust position.

In addition, the aforementioned multi-stage exhaust device can be re-ventilated The structure of the trough, the diversion trough and the diffusion trough avoids rapid gas expansion and reduces noise generation. The silencing ability of the first silencing member is smaller than the silencing ability of the second silencing member, so that the blockage of the gas passing through the first silencing member in the high torque mode can be avoided, and the back pressure affects the torsion. The second muffler has a strong silencing ability, which can reduce the noise of the user in the small torque mode; and the first exhaust amount is greater than the second exhaust amount, which helps the user to be fast in the large torque mode. Exhaust and maintain torque.

100‧‧‧Multi-section exhaust

200‧‧‧ row cylinder block

210‧‧‧through hole

220‧‧‧ outer perimeter

230‧‧‧Drainage trough

231‧‧‧Import

232‧‧‧export

240‧‧‧diffusion tank

250‧‧‧ventilation slot

300‧‧‧Exhaust ring

310‧‧‧ openings

410‧‧‧First silencer

420‧‧‧Second silencer

500‧‧‧Control ring

510‧‧‧ venting holes

520‧‧‧ venting holes

530‧‧‧Second exhaust zone

540‧‧‧First exhaust zone

1 is a perspective view of a multi-stage exhaust device of the present invention; FIG. 2 is a schematic exploded view of the multi-stage exhaust device of FIG. 1; FIG. 3A is a schematic view of the control ring and exhaust of FIG. The schematic diagram of the ring is located at the first exhaust position; FIG. 3B is a partial cross-sectional view of the multi-stage exhaust device of FIG. 1 along the face line 3B-3B; and FIG. 4 is a multi-stage exhaust device of FIG. a schematic view of the second exhaust position; FIG. 5A is a schematic view of the control ring and the exhaust ring of FIG. 4; FIG. 5B is a partial cross-sectional view showing the multi-stage exhaust device of FIG. 4 along the face line 5B-5B.

Embodiments of the present invention will be described below with reference to the drawings. For the sake of clarity, many practical details will be explained in the following description. However, it should be understood that these practical details are not intended to limit the novel. That is to say, in some embodiments of the present invention, these practical details are not necessary. In addition, some of the conventional structures and elements are illustrated in the drawings in a simplified schematic representation, and the

Please refer to FIG. 1 , wherein FIG. 1 is a perspective view of a multi-stage exhaust device 100 of the present invention. The multi-stage exhaust device 100 includes a row of cylinder blocks 200, an exhaust ring 300, and a regulating ring 500. The air tool of the multi-stage exhaust device 100 of the present invention can be provided with a pneumatic motor (not shown) in the exhaust cylinder block 200, and a high-pressure gas (not shown) is used to drive the air motor to rotate, and the air motor can be Connect a tool head such as a screwdriver or a wrench. This is a technique that can be understood by those of ordinary skill in the field of pneumatic tools, and is not the focus of the present invention, and will not be further described herein.

Please refer to FIG. 2 , wherein FIG. 2 is a schematic exploded view of the multi-stage exhaust device 100 of FIG. 1 . An outer circumferential surface 220 of the exhaust cylinder block 200 includes a venting groove 250, a flow guiding groove 230 and a diffusion groove 240. The guide groove 230 includes two inlet ports 231 and a outlet port 232. The inlet port 231 communicates with the vent groove 250, and the outlet port 232 communicates with the diffusion groove 240. Row cylinder block 200 Further, a plurality of through holes 210 are provided in the venting groove 250. The control ring 500 is sleeved on the outer side of the exhaust cylinder block 200, the control ring 500 includes a plurality of exhaust holes 510, 520; the exhaust hole 520 constitutes a first exhaust zone 540, and the exhaust hole 510 constitutes a second exhaust zone 530 The exhaust holes 510, 520 are aligned with the diffusion grooves 240. The exhaust ring 300 is sleeved on the outer side of the control ring 500, and the exhaust ring 300 includes a plurality of openings 310. In the embodiment, the exhaust holes 510 and 520 are all long slots, and the exhaust holes 510 are smaller than the exhaust. Hole 520.

The multi-stage exhaust device 100 may further include: a first The muffler 410 is disposed between the exhaust cylinder block 200 and the regulating ring 500, and the first muffler 410 is located in the venting groove 250. A second muffler 420 is disposed between the control ring 500 and the exhaust ring 300, and the second muffler 420 and the second exhaust zone 530 are aligned.

Please refer to Figures 3A and 3B and refer to Figure 1 together. 2, wherein FIG. 3A is a schematic view showing the control ring 500 and the exhaust ring 300 of FIG. 1 at a first exhaust position. FIG. 3B is a partial cross-sectional view of the multi-stage exhaust device 100 of FIG. 1 along the face line 3B-3B. The exhaust ring 300 of the present invention is rotatable relative to the control ring 500. As shown in FIG. 1 , the axial length of the control ring 500 is greater than the axial length of the exhaust ring 300. Therefore, when the exhaust ring 300 is sleeved on the control ring 500, the control ring 500 is partially exposed to the exhaust ring 300. The user can directly rotate the control ring 500 to adjust the position.

When the opening 310 of the exhaust ring 300 and the first exhaust zone 540 are In that case, the opening 310 and the exhaust hole 520 are in communication, and the exhaust ring 300 is located at the first exhaust position, and the first exhaust region 540 has a first exhaust amount. When the opening 310 of the exhaust ring 300 and the second exhaust zone 530 are opposite, the opening 310 and the exhaust hole 510 is in communication, at which point the exhaust ring 300 is in the second exhaust position (see Figure 5A) and the second exhaust zone 530 has a second exhaust volume. The multi-stage exhaust device 100 shown in Fig. 1 is located at the first exhaust position.

In more detail, when the exhaust ring 300 is located at the first exhaust position At this time, the gas in the exhaust cylinder 200 flows out from the through hole 210 and flows into the vent groove 250. At this time, since the vent groove 250 is provided with the first silencing member 410, there is a first-order mute effect. After the gas flows into the vent groove 250, it flows into the flow guide groove 230 through the introduction port 231, and flows into the diffusion groove 240 through the outlet port 232. At this time, by the flow guiding and buffering of the venting groove 250, the guiding groove 230 and the diffusion groove 240, the gas is prevented from rapidly expanding and generating noise, so that the second-order mute effect can be obtained. Then, since the exhaust hole 520 and the diffusion groove 240 are aligned, and the opening 310 and the exhaust hole 520 are in communication, the gas entering the diffusion groove 240 can flow out from the exhaust hole 520 through the opening 310 to achieve the exhaust effect. The amount of exhaust gas at this time is the first exhaust amount.

When the multi-stage exhaust device 100 is in the first exhaust position, Since the gas can be directly discharged from the exhaust hole 520 through the opening 310, and the exhaust hole 520 is larger than the exhaust hole 510, the first exhaust amount is greater than the second exhaust amount, and the gas can be quickly taken out from the exhaust hole 520 and The opening 310 is discharged. Therefore, when the multi-stage exhaust device 100 is located at the first exhaust position, it is suitable for the high torque mode. At this time, the amount of exhaust gas is large and smooth, and there is no case where the exhaust gas is prevented from being hindered, and the pressure on the outlet side is increased. Therefore, the back pressure does not cause a decrease in the torque of the motor.

Please refer to Figure 4, Figure 5A and Figure 5B for a reference. Figure 2. 4 is a perspective view showing the multi-stage exhaust device 100 of FIG. 1 at a second exhaust position, and FIG. 5A is a view showing the control ring 500 and the row of FIG. A schematic view of the gas ring 300, and FIG. 5B is a partial cross-sectional view of the multi-stage exhaust device 100 of FIG. 4 along the face line 5B-5B.

In more detail, when the exhaust ring 300 is located at the second exhaust position At this time, the gas in the exhaust cylinder 200 flows out from the through hole 210 and flows into the vent groove 250. At this time, since the vent groove 250 is provided with the first silencing member 410, there is a first-order mute effect. After the gas flows into the vent groove 250, it flows into the flow guide groove 230 through the introduction port 231, and flows into the diffusion groove 240 through the outlet port 232. At this time, by the flow guiding and buffering of the venting groove 250, the guiding groove 230 and the diffusion groove 240, the gas is prevented from rapidly expanding and generating noise, so that the second-order mute effect can be obtained. Further, since the vent hole 510 and the diffusion groove 240 are aligned, and the opening 310 and the vent hole 510 are in communication, the gas entering the diffusion groove 240 can flow out from the vent hole 510 and through the opening 310 to achieve the exhaust effect. The amount of exhaust gas at this time is the second exhaust amount. Since the second muffler 420 is disposed between the control ring 500 and the exhaust ring 300, and the second muffler 420 and the second exhaust zone 530 are aligned, the gas flowing out of the exhaust hole 510 passes through the second. After the muffler 420 is discharged from the opening 310, there is a third stage of mute effect.

In this embodiment, the first muffler 410 and the second muffler The 420 may be made of non-woven fabric, and the silencing ability of the first silencing member 410 is smaller than the silencing ability of the second silencing member 420. That is to say, the material density of the first silencing member 410 is small, the gap between the fibers is large, and therefore the gas easily passes; the material density of the second silencing member 420 is large, and the gap between the fibers is small, so that the gas does not easily pass. . The first silencing member 410 having a lower density not only has the effect of eliminating noise, but also keeps the gas flowing without being gas-filled. The situation of body stagnation occurs. When the multi-stage exhaust device 100 is located in the second exhaust position, it is suitable for the small torque mode, and at this time, less gas can be discharged, so that the gas can pass through the second muffler 420 having a higher density. The first muffler 410 and the second muffler 420 achieve a double noise cancellation effect.

In addition, in this embodiment, the control ring 500 can be opposite to the row. As the cylinder block 200 rotates, the exhaust ring 300 can rotate relative to the control ring 500. When a user is operating a pneumatic tool having a multi-stage exhaust device 100, the exhaust ring 300 may be rotated to a specific position, and then the control ring 500 is rotated to cause the exhaust ring 300 and the control ring 500 to be located at the first exhaust. Position or second exhaust position. This type of operation allows the user to determine the desired exhaust volume after determining the direction of the exhaust.

In other embodiments, the venting holes 510, 520 may also be phases The same size, and the number of exhaust holes 510 constituting the second exhaust zone 530 is smaller than the number of the exhaust holes 520 constituting the first exhaust zone 540, thereby making the second exhaust amount of the second exhaust zone 530 smaller than the first The first exhaust amount of the exhaust zone 540, of course, the shape of the exhaust holes 510, 520 is not limited to a long groove shape, and may be designed in a circular hole shape or an elliptical shape, and is not limited thereto.

The second exhaust zone 530 and the first exhaust zone 540 are in this implementation. In the example, it is disposed adjacently. In other embodiments, the second exhaust zone 530 and the first exhaust zone 540 may also be oppositely disposed.

The first silencing member 410 is disposed in the ventilation in this embodiment. The groove 250, in other embodiments, may also be disposed in the diffusion groove 240. It is of course also possible to provide a sound absorbing member in both the venting groove 250 and the diffusion groove 240.

In addition, in other embodiments, only one area may be arranged. The venting holes of the domain have the same size and shape. When the exhaust ring is in the second exhaust position, the opening and the partial exhaust hole have a second exhaust amount; when the exhaust ring is in the first exhaust position, the opening and all the exhaust holes are opposite The first amount of exhaust. The user can adjust the relative position of the exhaust ring and the control ring according to the usage, and then adjust the displacement. And when the exhaust ring is located at the second exhaust position, a second muffler may be disposed between the exhaust ring and the regulating ring to align the second muffler and the opening to increase the muffling effect.

According to the above embodiments, the present invention has the following advantages. point.

1. By the difference between the first exhaust amount and the second exhaust amount, and The exhaust ring can be switched between the first exhaust position and the second exhaust position, so that the user can select different exhaust amounts according to different use states.

Second, through the design of the venting groove, the diversion channel and the diffusion groove, Avoid rapid gas expansion and reduce noise.

Third, the first muffler with weak silencer is set in ventilation The slot, together with the second muffler with better silencing ability, is aligned with the opening at the second exhaust position, which contributes to the silencing in the small torque mode.

Fourth, the first muffler with weak muffling ability is set in ventilation The trough can retain a small amount of muffling effect while still retaining the smooth discharge of the gas, and then with the first exhaust gas amount that can quickly discharge the gas, can avoid the back pressure and affect the torsion, and contribute to the exhaust in the large torque mode.

5. Select different displacements by adjusting the position of the exhaust ring. To the multi-stage exhaust silencer purpose.

Although the present invention has been disclosed as above in the embodiment, it is not In order to limit the present invention, any person skilled in the art can make various changes and refinements without departing from the spirit and scope of the present invention. Therefore, the scope of protection of the present invention is defined by the scope of the appended patent application. quasi.

100‧‧‧Multi-section exhaust

200‧‧‧ row cylinder block

210‧‧‧through hole

220‧‧‧ outer perimeter

230‧‧‧Drainage trough

231‧‧‧Import

232‧‧‧export

240‧‧‧diffusion tank

250‧‧‧ventilation slot

300‧‧‧Exhaust ring

310‧‧‧ openings

410‧‧‧First silencer

420‧‧‧Second silencer

500‧‧‧Control ring

510‧‧‧ venting holes

520‧‧‧ venting holes

530‧‧‧Second exhaust zone

540‧‧‧First exhaust zone

Claims (14)

A multi-stage exhaust device comprising: a row of cylinder blocks including a plurality of through holes; a control ring sleeved on the outer side of the row of cylinder blocks, the control ring having a plurality of exhaust holes, and the plurality of exhaust holes One portion constitutes a first exhaust zone, and the other of the exhaust holes constitutes a second exhaust zone, the first exhaust zone having a first exhaust volume, the second exhaust zone Having a second exhaust amount, the first exhaust amount is different from the second exhaust amount; and an exhaust ring sleeved outside the control ring and having a plurality of openings, the exhaust ring having a relative regulation a first exhaust position of the ring and a second exhaust position, wherein the exhaust ring is in communication with the first exhaust region when the exhaust ring is located at the first exhaust position, the exhaust ring is located at the second exhaust The openings are in communication with the second exhaust zone when in position. The multi-stage venting device of claim 1, wherein an outer peripheral surface of the row of cylinder blocks further comprises: a venting groove for arranging the plurality of through holes; and a guiding groove having an inlet And a lead-out port, the inlet port is in communication with the venting groove; and a diffusion groove communicating with the outlet port, and the diffusion groove is aligned with the vent holes. The multi-stage exhaust device of claim 2, further comprising a second muffler disposed between the control ring and the exhaust ring and aligned with the second exhaust zone, the first row The gas volume is greater than the second exhaust the amount. The multi-stage exhaust device of claim 3, further comprising a first muffler disposed in the venting groove. The multi-stage exhaust device of claim 4, wherein the control ring rotates relative to the row of cylinder blocks, the exhaust ring rotating relative to the control ring. The multi-stage exhaust device of claim 4, wherein the first muffler has a silencing capability that is less than a muffling capability of the second muffler. A multi-stage exhaust device comprising: a row of cylinder blocks, comprising a plurality of through holes; a control ring sleeved on the outer side of the row of cylinder blocks, the control ring having a plurality of exhaust holes, one of the exhaust holes Part of the first exhaust zone, and the other of the exhaust holes constitutes a second exhaust zone, the first exhaust zone has a first exhaust volume, and the second exhaust zone has a second exhaust amount, the first exhaust amount is greater than the second exhaust amount; an exhaust ring is sleeved outside the control ring and has a plurality of openings, the exhaust ring having a first portion opposite to the control ring An exhaust position and a second exhaust position, wherein the exhaust ring is in communication with the first exhaust region when the exhaust ring is located at the first exhaust position, and the exhaust ring is located at the second exhaust position An opening is in communication with the second exhaust zone; a first muffling member and a second muffling member are disposed between the regulating ring and the row of cylinder blocks, and the second muffling member is disposed between the regulating ring and the exhaust ring. The multi-stage venting device of claim 7, wherein an outer peripheral surface of the row of cylinder blocks further comprises: a venting groove for arranging the plurality of through holes; and a guiding groove having an inlet And a lead-out port, the inlet port is in communication with the venting groove; and a diffusion groove communicating with the outlet port, and the diffusion groove is aligned with the venting hole. The multi-stage venting apparatus of claim 8, wherein the portion of the venting holes constituting the first venting region is larger than the other portion of the venting holes constituting the second venting region. The multi-stage exhaust device of claim 9, wherein the first muffler has a silencing ability smaller than a muffling capability of the second muffler. A multi-stage exhaust device comprises: a row of cylinder blocks, comprising a plurality of through holes; a control ring sleeved on the outer side of the row of cylinder blocks, the control ring has a plurality of exhaust holes; an exhaust ring, a sleeve Outside the control ring and having a plurality of openings, the The exhaust ring has a first exhaust position relative to the control ring and a second exhaust position. When the exhaust ring is in the first exhaust position, the openings have a first row relative to the exhaust holes a quantity of gas, when the exhaust ring is located at the second exhaust position, the openings have a second exhaust amount relative to the exhaust holes, the first exhaust amount is greater than the second exhaust amount; The second muffler is disposed between the control ring and the exhaust ring, and the second muffler is opposite to the openings at the second exhaust position. The multi-stage venting device of claim 11, wherein an outer peripheral surface of the row of cylinder blocks further comprises: a venting groove for arranging the plurality of through holes; and a guiding groove having an inlet And a lead-out port, the inlet port is in communication with the venting groove; and a diffusion groove communicating with the outlet port, and the diffusion groove is aligned with the venting hole. The multi-stage exhaust device of claim 12, further comprising a first muffler disposed on the venting groove, the muffling capability of the first muffler being less than the muffling capability of the second muffler. The multi-stage exhaust device of claim 11, wherein a part of the exhaust holes constitutes a first exhaust zone, and the other of the exhaust holes constitutes a second exhaust The first exhaust zone has the first exhaust amount opposite to the openings, and the second exhaust zone has the second exhaust amount opposite to the openings.