TWM656310U - Pneumatic tools and air intake components - Google Patents

Abstract

The present invention relates to an air intake assembly, which is provided at an air intake port of a pneumatic tool, and includes: a connector and a regulating member. The connector includes a first flow channel, at least a second flow channel and at least a third flow channel, wherein the first flow channel extends along an axial direction of the connector, and the at least a second flow channel and the at least a third flow channel are respectively provided in the connector transversely to the axial extension and connected to the first flow channel; the regulating member is rotatably sleeved on the connector and encloses a gas space between the regulating member and the connector and includes at least a through hole that can be connected to the at least a second flow channel, and the at least a third flow channel connects the gas space and the first flow channel. The present invention also provides a pneumatic tool, which includes the air intake assembly as described above.

Description

Pneumatic tools and air intake components

This invention relates to pneumatic tools, and in particular to a pneumatic tool and an air intake assembly thereof.

The air inlet port of a conventional pneumatic tool may be provided with a speed regulating valve according to the demand. The speed regulating valve may be actuated by a dial, a button or a knob to change the cross-sectional area of the gas flow channel, thereby changing the air intake volume to achieve the effect of adjusting the output power.

The existing speed regulating valve includes a kit, which is rotatably mounted on a joint of the pneumatic tool, and a bearing is disposed between the kit and the joint so that the two can smoothly rotate relative to each other, thereby changing the cross-sectional area of a gas flow channel of the pneumatic tool. However, when a gas is input from the joint, the gas will generate a gas pressure toward the bearing on the kit, which will cause the bearing to wear after long-term use, making the speed regulating valve unable to operate smoothly, and there is a disadvantage that needs to be improved urgently.

Therefore, it is necessary to provide a novel and advanced pneumatic tool and its air intake assembly to solve the above-mentioned problems.

The main purpose of this invention is to provide a pneumatic tool and an air intake assembly thereof, which can adjust the air intake volume and effectively prevent the damage of parts.

To achieve the above-mentioned purpose, the invention provides an air intake assembly for being arranged at an air intake port of a pneumatic tool, comprising: a connector and a regulating member. The connector comprises a first flow channel, at least one second flow channel and at least one third flow channel, the first flow channel extends along an axial direction of the connector, the at least one second flow channel and the at least one third flow channel are respectively arranged in the connector transversely to the axial extension and connected to the first flow channel; the regulating member is rotatably sleeved on the connector and encloses a gas space between the connector and comprises at least one through hole that can be correspondingly connected to the at least one second flow channel, and the at least one third flow channel connects the gas space and the first flow channel.

To achieve the above-mentioned purpose, the invention provides a pneumatic tool, comprising the air intake assembly as described above, and further comprising: a body and a connecting piece. The body comprises an air intake passage connected to the air intake port; the connecting piece is arranged in the air intake passage, one end of the joint extends into the air intake passage and is connected to the connecting piece, and the regulating piece is at least partially exposed outside the body; wherein the at least one through hole is connected between the at least one second flow passage and the air intake passage to form at least one guide flow passage.

The following is merely an example to illustrate possible implementations of the present invention, but it is not intended to limit the scope of protection for the present invention. The "one" or "at least one" preceding the terms mentioned in the text does not limit the quantity, and it can also be "plural" according to needs. This change in quantity is also within the scope of protection, which should be stated in advance.

Please refer to Figures 1 to 4, which show a preferred embodiment of the present invention. The air intake assembly 1 of the present invention is provided at an air intake port 310 of a pneumatic tool 2, and includes: a connector 10 and a regulating member 20.

The connector 10 includes a first flow channel 11, at least one second flow channel 12 and at least one third flow channel 13. The first flow channel 11 extends along an axial direction A of the connector 10. The at least one second flow channel 12 and the at least one third flow channel 13 are respectively extended transversely to the axial direction A and penetrate the connector 10 and connect to the first flow channel 11. The regulating member 20 is rotatably sleeved on the connector 10 and encloses a gas space 21 with the connector 10 and includes at least one through hole 22 that can be connected to the at least one second flow channel 12. The at least one third flow channel 13 connects the gas space 21 and the first flow channel 11. In this way, the air intake assembly 1 of the invention can adjust the gas flow rate and reduce the wear of components without the need for bearings.

Specifically, the regulating member 20 includes at least one annular flange 23 radially abutting against an annular wall 320 of the pneumatic tool 2 and an end face 24 located in the air inlet port 310, and a radial cross-sectional area of the gas space 21 is approximately equal to the sum of the radial area of the end face 24 and the radial area of the annular flange 23. When a gas is input into the first flow channel 11 from the air inlet port 310, part of the gas can enter the gas space 21 through the at least one third flow channel 13 to generate an air pressure toward one side of the end surface 24 of the regulating member 20, and maintain pressure balance with the air pressure toward one side of the gas space 21 generated by the gas flowing through the at least one second flow channel 12, as shown in the air pressure direction indicated by the solid arrow in FIG. 4, thereby allowing the regulating member 20 to rotate smoothly relative to the joint 10.

In detail, the connector 10 includes a first section 14 and a second section 15 distributed along the axial direction A, a radial dimension of the first section 14 is smaller than a radial dimension of the second section 15, the at least one second flow channel 12 and the at least one third flow channel 13 are arranged in the first section 14, and the at least one third flow channel 13 is located on a side of the first section 14 adjacent to the second section 15; the connector 10 further includes at least one fourth flow channel 16 extending transversely to the first flow channel 11, and the at least one fourth flow channel 16 is located on a side of the at least one second flow channel 12 relatively far from the at least one third flow channel 13. Thus, when the gas is inputted into the first flow channel 11 from the air inlet port 310, the gas flows into the at least one second flow channel 12 and the at least one third flow channel 13 respectively, and then converges through the at least one fourth flow channel 16, as shown in the airflow direction indicated by the dotted arrows in FIG. 4 .

The air intake assembly 1 further includes a first positioning unit 30 and a second positioning unit 40 that can be releasably locked. The first positioning unit 30 is disposed on the joint 10, and the second positioning unit 40 is disposed on the regulating member 20, so that the gas flow rate can be adjusted in stages. In this embodiment, the regulating member 20 includes a plurality of through holes 22, and the plurality of through holes 22 include at least two different apertures; the first positioning unit 30 includes a plurality of locking members 31 and a plurality of elastic members 32 that elastically push against the plurality of locking members 31, and the second positioning unit 40 includes a plurality of slots 41 that are recessed on the inner circumference of the regulating member 20. When the adjusting member 20 rotates relative to the connector 10, part of the plurality of through holes 22 may correspond to the at least one second flow channel 12, and the plurality of abutting members 31 may abut against the plurality of abutting grooves 41, thereby changing the cross-sectional area of the gas flow, thereby achieving the purpose of adjusting the gas flow, and the structure is simple and convenient for production and operation. In other embodiments, the plurality of through holes may also have a single aperture, and the at least one second flow channel may have multiple apertures, which may also achieve an adjusting effect.

Preferably, the cross-sectional area of each third flow channel 13 is smaller than the cross-sectional area of each second flow channel 12, so that most of the gas can still be introduced into the pneumatic tool 2. In the axial direction A, a height of the gas space 21 is greater than a diameter of each third flow channel 13, which can provide appropriate upward air pressure to achieve balance.

The air intake assembly 1 further includes at least one first seal 50 and at least one second seal 60, which are sandwiched between the joint 10 and the regulating member 20 in a gas-tight manner and are located on two opposite sides of the gas space 21 in the axial direction A, and have good sealing performance. The air intake assembly 1 further includes at least one third seal 70 disposed on the outer periphery of the regulating member 20, and the at least one third seal 70 is sandwiched between the annular wall 320 and the regulating member 20 in a gas-tight manner, and can be stably assembled to prevent gas leakage.

The invention provides a pneumatic tool 2, comprising the air intake assembly 1 as described above, and further comprising: a body 3 and a connector 4. The body 3 comprises an air intake passage 330 connected to the air intake port 310; the connector 4 is disposed in the air intake passage 330, one end of the connector 10 extends into the air intake passage 330 and is connected to the connector 4, and the regulating member 20 is at least partially exposed outside the body 3, so as to be operable and adjustable; wherein the at least one through hole 22 is connected between the at least one second flow channel 12 and the air intake passage 330 to form at least one guide flow channel 5. When the gas is input from the first flow channel 11, the air pressure in the gas space 21 is balanced with the air pressure in the at least one guide flow channel 5, reducing the friction between the connector 10 and the regulating member 20 so that they can rotate relative to each other smoothly.

In this embodiment, the connector 10 is provided with an external threaded section 17 at a section relatively far from the adjusting member 20, and the connecting member 4 is provided with an internal threaded section 410 which can be threadedly connected to the external threaded section 17, so that the assembly stability is good; the at least one guide channel 5 is located in the main body 3, and the gas space 21 is located entirely outside the main body 3. The adjusting member 20 can abut against the main body 3 in the axial direction A, so that the assembly stability is good.

1: Intake assembly 2: Pneumatic tool 3: Body 4: Connector 5: Guide channel 10: Joint 11: First channel 12: Second channel 13: Third channel 14: First section 15: Second section 16: Fourth channel 17: External thread section 20: Adjustment part 21: Gas space 22: Through hole 23: Annular flange 24: End face 30: First positioning unit 31: Snap-on part 32: Elastic part 40: Second positioning unit 41: Slot 50: First seal 60: Second seal 70: Third seal 310: Intake port 320: Annular wall 330: Intake channel 410: Internal thread section A: Axial

Figure 1 is a three-dimensional diagram of a preferred embodiment of the present invention. Figure 2 is a partial exploded diagram of a preferred embodiment of the present invention. Figure 3 is a partial enlarged diagram of Figure 2. Figure 4 is a cross-sectional diagram of a preferred embodiment of the present invention.

1: Intake assembly

2: Pneumatic tools

10: Connector

20: Adjustment parts

Claims (10)

An air intake assembly is provided for an air intake port of a pneumatic tool, comprising: a connector, comprising a first flow channel, at least one second flow channel and at least one third flow channel, the first flow channel extending along an axial direction of the connector, the at least one second flow channel and the at least one third flow channel respectively extending transversely to the axial direction and penetrating the connector and connected to the first flow channel; and a regulating member, rotatably sleeved on the connector and enclosing a gas space between the connector and the connector, comprising at least one through hole corresponding to the at least one second flow channel, the at least one third flow channel connecting the gas space and the first flow channel. An air intake assembly as described in claim 1, wherein the regulating member includes at least one annular flange for radially abutting against an annular wall of the pneumatic tool and an end face within the air intake port, and a radial cross-sectional area of the gas space is approximately equal to the sum of the radial area of the end face and the radial area of the annular flange. The air intake assembly as described in claim 1 further comprises at least one first seal and at least one second seal, wherein the at least one first seal and the at least one second seal are gas-tightly sandwiched between the joint and the regulating member and are located on two axially opposite sides of the gas space. An intake assembly as described in claim 1, wherein the cross-sectional area of each of the third flow channels is smaller than the cross-sectional area of each of the second flow channels. An air intake assembly as described in claim 1, wherein in the axial direction, a height of the gas space is greater than a diameter of each of the third flow channels. An intake assembly as described in claim 1, wherein the joint includes a first section and a second section distributed along the axial direction, a radial dimension of the first section is smaller than a radial dimension of the second section, the at least one second flow channel and the at least one third flow channel are arranged in the first section and the at least one third flow channel is located on a side of the first section adjacent to the second section. An air intake assembly as described in claim 6, wherein the regulating member includes at least one annular flange for radially abutting against an annular wall of the pneumatic tool and an end face located in the air intake port, and a radial cross-sectional area of the gas space is approximately equal to the sum of the radial area of the end face and the radial area of the annular flange; the air intake assembly further includes at least one first seal and at least one second seal, the at least one first seal and the at least one second seal are gas-tightly sandwiched between the joint and the regulating member and are located on two axially opposite sides of the gas space; the air intake assembly further includes at least one third seal arranged on the outer periphery of the regulating member, the at least one third seal is gas-tightly sandwiched between the annular wall and the regulating member ; the cross-sectional area of each of the third flow channels is smaller than the cross-sectional area of each of the second flow channels; in the axial direction, a height of the gas space is greater than a diameter of each of the third flow channels; the regulating member includes a plurality of the through holes, and the plurality of through holes include at least two different apertures; the air intake assembly further includes a first positioning unit and a second positioning unit that can be releasably engaged with each other, the first positioning unit is arranged on the joint, and the second positioning unit is arranged on the regulating member; the joint further includes at least one fourth flow channel extending transversely to the first flow channel, the at least one fourth flow channel is located on a side of the at least one second flow channel that is relatively far away from the at least one third flow channel; and the regulating member includes a plurality of the through holes, and the plurality of through holes include at least two different apertures. A pneumatic tool, comprising an air intake assembly as described in any one of claims 1 to 7, further comprising: a body, comprising an air intake passage connected to the air intake port; and a connecting piece, disposed in the air intake passage, one end of the connector extending into the air intake passage and connected to the connecting piece, the regulating piece at least partially exposed outside the body; wherein the at least one through hole is connected between the at least one second flow passage and the air intake passage to form at least one guide flow passage. A pneumatic tool as described in claim 8, wherein when a gas is introduced from the first flow channel, the air pressure in the gas space is kept balanced with the air pressure in the at least one guide flow channel. An air tool as described in claim 8, wherein the at least one guide channel is located inside the body and the gas space is entirely located outside the body.

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