TWI656951B - Pneumatic tool with adjustable speed and torque - Google Patents

Abstract

The invention relates to a pneumatic tool with an effect of adjusting the rotational speed and the torsion force, which comprises a body, a pressing component and a torque adjusting unit, wherein the body is provided with an air inlet passage and an exhaust passage respectively and an air compression And the torque adjusting unit is connected, and when the pressing component is pressed, compressed air flows in from the air inlet passage and flows out from the exhaust passage, and the torque adjusting unit transmits a relative movement of a piston and a exhaust portion. Adjusting the displacement of the body, so as to adjust the rotation speed and torque of the body under the same intake pressure, effectively solving the shortcomings of the existing pneumatic tools can only control the start or not, can not change the speed and torque of the pneumatic tools and the use of Limits to provide a pneumatic tool with adjustable speed and torque.

Description

Pneumatic tool with adjustable speed and torque

The invention relates to a pneumatic tool, in particular to a pneumatic tool having the effect of adjusting the rotational speed and the torque.

As shown in FIG. 18, the conventional pneumatic tool 90 includes a body 91, a driving component 92, a pressing component 93, and a muffler 94. The body 91 includes a receiving cavity 911 and a receiving cavity 911. An open pressing chamber 912, an intake passage 913 communicating with the pressing chamber 912, and an exhaust passage 914 communicating with the pressing chamber 912 and spaced apart from the intake passage 913, the driving element 92 is correspondingly disposed In the accommodating cavity 911, the pressing component 93 is correspondingly disposed in the pressing cavity 912. The muffler 94 is connected to the bottom of the body 91 and correspondingly communicates with the exhausting passage 914.

When the existing pneumatic tool 90 is used, an air compressor is connected via a pipeline, and compressed air is introduced into the air inlet passage 913 through the pipeline, so that the user can press the pressing component 93 to allow the compressed air to enter. The accommodating cavity 911 drives the driving component 92 to rotate relative to the body 91 to operate the existing pneumatic tool 90, and the remaining gas is discharged from the body 91 via the exhaust passage 914 and the muffler 94, thereby compressing the gas. The pressure differential provided drives the existing pneumatic tool 90 to provide the required rotational speed and torque of the existing pneumatic tool 90.

However, as can be seen from FIG. 18, in the various parts of the conventional pneumatic tool 90, the user can only control the passage of the compressed air through the pressing member 93, and cannot pass through the structure of the body 91, the driving member 92 or the muffling. The device 94 controls the amount of gas in and out. Therefore, the existing pneumatic tool 90 cannot adjust the rotational speed and the torsion force, and it is difficult to meet the diversified use requirements of the user, and causes limitations in use. In summary, the existing pneumatic tool 90 does have its Need to improve.

In order to solve the defects that the existing pneumatic tools can only control the starting or not, and can not change the rotational speed and the torque of the pneumatic tool, the present invention effectively solves the existing problem by providing a muffler seat for use with a piston, combining the muffler seat with a pneumatic tool. The shortcomings and limitations of the use of pneumatic tools are further illustrated below.

The present invention is a pneumatic tool having an effect of adjusting the rotational speed and the torsion force, which comprises a body, a pressing component and a torque adjusting unit, wherein: the system is provided with a receiving cavity, an intake passage and an exhaust passage. The air inlet channel is spaced apart from the air exhaust channel and is respectively connected to the accommodating cavity; the pressing component is disposed in the accommodating cavity in combination with the body, and the pressing component is provided with a button, and pressing the button Pressing the button to connect the intake passage and the exhaust passage to the pressing assembly; and the torque adjusting unit is coupled with the body to communicate with the exhaust passage, and includes a silencer seat and an adjusting screw And a piston, wherein the damper is provided with a receiving groove and a venting portion, the venting portion is in communication with the accommodating groove, and the venting portion is provided with a threaded hole and at least one venting hole. The hole is spaced apart from the at least one venting hole and communicates with the accommodating groove respectively. The adjusting screw extends through the threaded hole from the bottom side, thereby being combined with the damper, the piston system Provided on the adjustment screw, and received in the receiving groove.

The pneumatic tool has an adjustable speed and a torsion effect, wherein the accommodating groove is disposed at a top end of the damper seat, the venting portion is located at a bottom side of the accommodating groove, and the piston is located above the venting portion.

The pneumatic tool has an adjustable speed and a torsion effect, wherein the torsion adjusting unit is provided with an abutting member, the receiving groove is disposed at a top end of the muffler seat, and the exhausting portion is located at a top side of the receiving groove, the piston Located below the exhaust portion, the abutting member is fixed to the top end of the adjusting screw and located above the exhaust portion.

The pneumatic tool has the advantages of adjusting the rotational speed and the torsion effect, wherein the pressing component comprises a valve core sleeve, a valve core, an air guiding passage and a gas guiding member, and the valve core sleeve is disposed on the inner side of the receiving cavity. The valve core is disposed on the inner side of the valve sleeve, and the air guiding passage is formed in a gap between the valve sleeve and the valve core, and when the button is pressed, the air guiding passage is in communication with the air inlet passage, The air guiding member is disposed inside the exhaust passage and communicates with the air guiding passage.

Still further, the above pneumatic tool has an effect of adjusting the rotational speed and the torsion force, wherein the adjusting screw and the center of the piston are respectively provided with a through hole, and the two perforations are in communication and are disposed at a position near the bottom end of the air guiding member.

Preferably, the above pneumatic tool has an effect of adjusting the rotational speed and the torsion force, wherein the intake passage is connected to an external air compressor.

Preferably, the above pneumatic tool has an effect of adjusting the rotational speed and the torque, wherein the adjusting screw is connectable to an external external fitting, and the external fitting can be a counter or a pressure gauge.

According to the above technical feature, the present invention adjusts the displacement of the body by changing the torsion adjustment unit, thereby adjusting the rotation speed and the torque of the body, thereby effectively solving the problem that the existing pneumatic tool can only control the starting or not, and cannot change the pneumatic tool. The shortcomings of the rotational speed and the torsion and the limitation of the use, the present invention further provides a pneumatic signal by providing the air guiding channel and the air guiding member, so that the user can easily connect the measuring pressure of the external accessory to adjust the rotational speed and the torque. In order to provide a pneumatic tool with adjustable speed and torque.

In order to understand the technical features and practical functions of the present invention in detail, and can be implemented in accordance with the contents of the specification, the detailed description of the preferred embodiment shown in the drawings is as follows:

The present invention is a pneumatic tool having an effect of adjusting the rotational speed and the torsion force. The first preferred embodiment is as shown in FIG. 1 and includes a body 10, a pressing assembly 20 and a torque adjusting unit 30, wherein:

As shown in FIG. 1 , the body 10 is defined as a front side toward the left side of FIG. 1 , and the body 10 is connected to an air compressor (not shown). The body 10 is internally provided with a receiving cavity 11 and a An air passage 12 and an exhaust passage 13 are disposed in a middle portion of the body 10 and communicate with a pneumatic motor (not shown) provided in the upper portion of the body 10; the intake passage 12 is disposed near the rear side of the body 10, the bottom end of the air inlet passage 12 is in communication with the air compressor, and the top end of the air inlet passage 12 is in communication with the accommodating chamber 11; the exhaust passage 13 A position close to the front side of the body 10 is spaced from the intake passage 12, and a top end of the exhaust passage 13 communicates with the accommodating chamber 11.

The pressing component 20 is coupled to the body 10 and is received in the accommodating cavity 11 and protrudes from the front side of the body 10. The pressing component 20 includes a valve core sleeve 21, a valve core 22, and a piston rod. And a button 24, wherein the valve core sleeve 21 is disposed in the accommodating cavity 11, and the valve core sleeve 21 has an opening toward the front side; the valve core 22 is disposed in the valve core sleeve 21; the piston The rod 23 is movably disposed in front and rear of the valve core 22, the rear end of the piston rod 23 protrudes from the rear side of the valve sleeve 21, and the front end of the piston rod 23 protrudes from the body 10; The button 24 is coupled with the front end of the piston rod 23 to push the piston rod 23 relative to the valve core 22. When the user presses the button 24, the piston rod 23 moves to the rear side, so that the compressed air can be self-contained. The intake passage 12 enters the spool sleeve 21, and further drives the air motor upward, and then enters the exhaust passage 13 through the position of the spool sleeve 22 near the front side.

As shown in FIG. 1 and FIG. 2 , the torsion adjusting unit 30 is coupled to the body 10 and communicates with the bottom end of the exhaust passage 13 . The torque adjusting unit 30 includes a muffler 31 and an adjustment. a screw 32, a piston 33 and a bottom cover 34, wherein the muffler seat 31 is coupled to the bottom of the body 10, and communicates with the exhaust passage 13, the hollow block 301 and a hollow net body 301 are disposed therein. The sound absorbing member 302 includes a receiving groove 311, a venting portion 312, and a plurality of through holes 313. The receiving groove 311 is formed on the inner side of the top of the damper base 31. See FIG. 1 and FIG. 3A. The venting portion 312 is located at the bottom side of the accommodating groove 311, and a threaded hole 314 is formed in the center of the venting portion 312, and the venting portion 312 is spaced through the row at the periphery of the threaded hole 314. The air portion 312 is provided with two exhaust holes 315, and the two exhaust holes 315 communicate with the upper and lower sides of the exhaust portion 312. The plurality of through holes 313 are formed through the side wall of the muffler seat 31, thereby making the row The gas in the gas passage 13 is discharged through the plurality of perforations 313.

Referring to FIGS. 3A to 3F, the exhaust portion 312 of the muffler seat 31 has various aspects. The exhaust portions 312 of various aspects are provided with a central threaded hole 314, and the exhaust hole 315 of FIG. 3A is As shown in FIGS. 3B to 3F, it may be an exhaust hole 316 or a plurality of exhaust holes 317, 318, 319, 320.

Referring to FIG. 1 and FIG. 2, the adjusting screw 32 is coupled with the muffler seat 31, and is inserted from the bottom of the exhaust portion 312 and movably coupled with the threaded hole 314; the piston 33 is coupled thereto. The adjusting screw 32 is coupled to the top end of the adjusting screw 32, and the piston 33 is received in the receiving groove 311 and abuts against the exhausting portion 312; the bottom cover 34 is coupled to the sound attenuating The seat 31 is combined and closes the bottom of the muffler seat 31, and a center of the bottom cover 34 is provided with a threaded hole, and is matched with a closing screw having an inner diameter larger than the head of the adjusting screw 32. The adjusting tool (not shown) can be inserted into the torque adjusting unit 30 through the threaded hole, so that the adjusting screw 32 can be rotated by the adjusting tool.

As shown in FIG. 4 to FIG. 7 , the torque adjustment unit 30 defines an R value, which is defined as the gap between the piston 33 and the top end of the inner side wall of the accommodating groove 311 , and the user can pass the adjusting screw. 32 changing the relative position of the piston 33 and the accommodating groove 311, and further changing the magnitude of the R value, as shown in FIG. 4 and FIG. 5, when the user screwes the adjusting screw 32 toward the body 10 The piston 33 moves away from the muffler seat 31. At this time, the R value of the torque adjusting unit 30 is increased from R1 to R2, and the exhaust of the body 10 is provided when the air compressor supplies the same intake pressure. The amount of increase increases the pressure difference between the intake passage 12 and the exhaust passage 13, further allowing compressed air to flow more quickly within the body 10, and the air motor of the body 10 is thus more easily pushed by compressed air. In turn, the rotational speed and torque of the body 10 are increased.

As shown in FIG. 6 and FIG. 7 , when the user rotates the adjusting screw 32 away from the body 10 , the piston 33 moves toward the sound absorbing seat 31 . At this time, the torque adjusting unit 30 The R value is reduced from R1 to R3. When the air compressor provides the same intake pressure, the exhaust volume of the body 10 is reduced, and the pressure difference between the intake passage 12 and the exhaust passage 13 is decreased, further The compressed air is slowed down in the body 10, and the air motor of the body 10 is thus more difficult to be pushed by the compressed air, thereby causing the rotational speed and torsion of the body 10 to decrease.

Referring to the second preferred embodiment of the present invention, please refer to FIG. 8 to FIG. 9 , which is different from the first preferred embodiment in that the torsion adjusting unit 40 includes an abutting member 46 , and the muffling seat 41 . The accommodating slot 411 is disposed at the top of the damper base 41, and the venting portion 412 of the damper base 41 is disposed on the top side of the accommodating slot 411. The adjusting screw 42 is provided with a limiting portion 421. The piston 43 is coupled to the adjusting screw 42 and abuts against the limiting portion 421 to move relative to the receiving groove 411 in the silencing seat 41; the abutting member 46 is fixed to the adjusting portion The top end of the screw 42 moves with the adjustment screw 42 and can abut against the exhaust portion 412.

Referring to FIG. 9 and FIG. 10, it can be seen from the above that the second preferred embodiment of the present invention differs from the first preferred embodiment in that the relative positions of the piston 43 and the exhaust portion 412 are different when the user When the adjusting screw 42 is rotated away from the main body 10, the piston 43 moves away from the exhausting portion 412, and the R value is increased, the exhausting amount of the main body 10 is increased, and the rotational speed and the rotational force are opposite. Corresponding to the ascending; when the adjusting screw 42 is screwed in the direction of the main body 10, the piston 43 moves in the direction of approaching the exhausting portion 412, so that the R value decreases, the exhausting amount of the body 10 decreases, and the rotational speed is The torque is relatively decreased, so the relationship between the R value and the rotational speed and the torque is positively correlated, which is the same as in the first preferred embodiment.

For a third preferred embodiment of the present invention, please refer to FIG. 11 and FIG. 12 , which is different from the first preferred embodiment in that the pressing component 20 is provided with an air guiding channel 25 and a gas guiding member 26 . The air guiding passage 25 is a gap between the valve core sleeve 21 and the valve core 22, and the air guiding passage 25 is located near the bottom side of the rear end of the valve core 22. The air guiding member 26 is disposed in the row. In the gas passage 13, the gas guiding member 26 communicates with the air guiding passage 25, and the gas in the air guiding passage 25 is completely introduced, and the gas entering the rear end of the valve sleeve 21 is shunted and introduced, and the gas is introduced into the rear end of the valve sleeve 21. The air guiding channel 25 and the air guiding member 26 can provide a pressure signal, and the air pressure signal can cause an external accessory to generate a corresponding function.

Further, the difference between the torque adjustment unit 50 and the first preferred embodiment is that the adjustment screw 52 extends through the bottom cover 54 and is inserted from the bottom of the exhaust portion 512 to be movably coupled with the muffler 51. And the adjusting screw 52 and the center of the piston 53 respectively extend through a through hole, and the two punching sleeves are disposed at a position near the bottom end of the air guiding member 26 to transmit the air pressure signal. Preferably, the torque adjustment is performed. The unit 50 includes a closing screw 55 coupled to the bottom end of the adjusting screw 52 and closing the through hole of the adjusting screw 52. When the closing screw 55 is not removed, the torque adjusting unit 50 operates in the same manner. A preferred embodiment is the same.

When the user removes the closing screw 55 and connects the adjusting screw 52 to an external accessory (not shown), the external accessory can receive the air pressure signal transmitted by the air guiding member 26, and the external accessory can be a counter. A pressure gauge or other device operable by the air pressure signal enables the body 10 to perform functions such as counting or measuring pressure. For example, when the user presses the button 24 once, the air guide member 26 transmits a pressure signal to The counter is counted, and the number of times of pressing is calculated. Referring to FIG. 13 to FIG. 15 , by changing the R value of the torque adjusting unit 50 according to the operation mode of the first preferred embodiment, the strength of the air pressure signal can be relatively changed, thereby The external accessory is measured for pressure value for adjustment of the rotational speed and torque.

Referring to the fourth preferred embodiment of the present invention, as shown in FIG. 16 and FIG. 17, the difference from the third preferred embodiment is that the relative position of the piston 63 and the exhaust portion 612 is different, and An abutting member 66 is fixed to the top end of the adjusting screw 62, so as to provide a limiting effect by the abutting member 66 abutting against the exhausting portion 612. As shown in FIG. 17, the adjusting screw 62 can be connected with an external fitting ( The connection is not shown. The R value of the torque adjustment unit 60 is changed according to the operation mode of the second preferred embodiment, that is, the strength of the air pressure signal is relatively changed, so that the external accessory measures the pressure value for the rotation speed. Adjustment with torque.

With the above technical features, the present invention adjusts the displacement of the body 10 by changing the torque adjustment unit 30, 40, 50, 60, thereby adjusting the rotation speed and the torque of the body 10, thereby effectively solving the problem that the existing pneumatic tools can only be controlled. The invention can not change the shortcomings of the rotational speed and the torque of the pneumatic tool and the limitation of the use. The present invention further provides a pressure signal through the air guiding passage 25 and the air guiding member 26, so that the user can easily connect the air pressure signal. The external accessory measures the pressure to adjust the R value to change the speed and torque, thereby providing a pneumatic tool with adjustable speed and torque.

The above is only a preferred embodiment of the present invention, and is not intended to limit the scope of the present invention. Any one of ordinary skill in the art can use the present invention without departing from the scope of the present invention. Equivalent embodiments of the present invention may be within the scope of the technical solutions of the present invention without departing from the technical scope of the present invention.

10‧‧‧ Ontology

11‧‧‧容容

12‧‧‧Intake passage

13‧‧‧Exhaust passage

20‧‧‧ Pressing components

21‧‧‧ spool sleeve

22‧‧‧Spool

23‧‧‧ piston rod

24‧‧‧ button

25‧‧‧ air guiding channel

26‧‧‧Air guides

30, 40, 50‧ ‧ Torque adjustment unit

301‧‧‧ net body

302‧‧‧Muffler

31, 41, 51‧‧ ‧ Silencer

311, 411, 511‧‧‧ accommodating slots

312, 412, 512, 612‧‧ venting department

313‧‧‧Perforation

314‧‧‧Threaded holes

315, 316, 317, 318, 319, 320‧‧‧ vents

32, 42, 52, 62‧‧‧ adjustment screws

33, 43, 53, 63‧‧ ‧ Pistons

34, 54, 64‧‧‧ bottom cover

421‧‧‧Limited

46, 66‧‧‧ nuts

55, 65‧‧‧ Closed screws

90‧‧‧ pneumatic tools

91‧‧‧Ontology

911‧‧‧容容

912‧‧‧ Pressing cavity

913‧‧‧Intake passage

914‧‧‧Exhaust passage

92‧‧‧Drive components

93‧‧‧ Pressing components

94‧‧‧Muffler

BRIEF DESCRIPTION OF THE DRAWINGS Figure 1 is a partial cross-sectional side view showing a first preferred embodiment of the present invention. 2 is an exploded perspective view of a torsion adjusting unit according to a first preferred embodiment of the present invention. Fig. 3A is a plan view showing a first aspect of the damper holder of the first preferred embodiment of the present invention. Figure 3B is a top plan view of a second aspect of the muffler seat of the first preferred embodiment of the present invention. Figure 3C is a plan view of a third aspect of the damper mount of the first preferred embodiment of the present invention. Figure 3D is a plan view of a fourth aspect of the damper mount of the first preferred embodiment of the present invention. Fig. 3E is a plan view showing a fifth aspect of the damper holder of the first preferred embodiment of the present invention. Figure 3F is a plan view of a sixth aspect of the damper mount of the first preferred embodiment of the present invention. 4 is a schematic diagram showing the operation of increasing the R value from R1 to R2 in the first preferred embodiment of the present invention. Figure 5 is a graph showing the relationship of the R value from R1 to R2 in the first preferred embodiment of the present invention. Figure 6 is a schematic diagram showing the operation of the R value of R1 from R1 to R3 in the first preferred embodiment of the present invention. Figure 7 is a graph showing the relationship of the R value from R1 to R3 in the first preferred embodiment of the present invention. Figure 8 is an exploded perspective view of a torsion adjusting unit according to a second preferred embodiment of the present invention. 9 and 10 are partial side cross-sectional views showing different R values of a second preferred embodiment of the present invention. Figure 11 is a partial cross-sectional side view showing a third preferred embodiment of the present invention. Figure 12 is an exploded perspective view of a torsion adjusting unit according to a third preferred embodiment of the present invention. 13 to 15 are partial side cross-sectional views showing different R values of a third preferred embodiment of the present invention. Figure 16 is an exploded perspective view of a torsion adjusting unit according to a fourth preferred embodiment of the present invention. Figure 17 is a partial side cross-sectional view showing a fourth preferred embodiment of the present invention. Figure 18 is a side elevational view, partially in section, of a prior art pneumatic tool.

Claims (10)

A pneumatic tool having an effect of adjusting a rotational speed and a torque, comprising: a body having a receiving cavity, an intake passage, and an exhaust passage, wherein the intake passage is spaced apart from the exhaust passage; And respectively connected to the accommodating cavity; a pressing component is coupled to the body and disposed in the accommodating cavity, the pressing component is provided with a button, and the button is pressed to make the air inlet channel and the exhausting device a channel is respectively connected to the pressing component; and a torsion adjusting unit is coupled to the body and communicates with the exhaust passage, and includes a muffler seat, an adjusting screw and a piston, wherein the muffling seat is provided The venting portion is connected to the accommodating groove, and the venting portion is provided with a threaded hole and at least one venting hole, and the threaded hole is opposite to the at least one venting hole Arranging at intervals, and respectively communicating with the accommodating groove, the adjusting screw extends from a side away from the body and penetrates the threaded hole, thereby being combined with the damper, the piston is fixed to the adjusting screw, And can accommodate The receiving groove. The pneumatic tool of claim 1, wherein the accommodating groove is disposed at a top end of the damper seat, the venting portion is located at a bottom side of the accommodating groove, and the piston is located at the venting portion. Above. The pneumatic tool according to claim 1, wherein the torsion adjusting unit is provided with an abutting member, the receiving groove is disposed at a top end of the muffler seat, and the exhausting portion is located in the receiving groove. The top side of the piston is located below the exhaust portion, and the abutting member is fixed to the top end of the adjusting screw and located above the exhaust portion. The pneumatic tool of claim 1 , wherein the pressing component comprises a valve core sleeve, a valve core, an air guiding passage and a gas guiding member, wherein the valve core sleeve is disposed on the pneumatic tool. An inner side of the accommodating cavity, the valve core is disposed inside the valve sleeve, and the air guiding channel is formed on the valve core sleeve The air guiding passage is in communication with the air inlet passage when the button is pressed, and the air guiding member is disposed inside the exhaust passage and communicates with the air guiding passage. The pneumatic tool according to claim 4, wherein the accommodating groove is disposed at a top end of the damper seat, the venting portion is located at a bottom side of the accommodating groove, and the piston is located at the venting portion. Above. The air tool according to claim 5, wherein the adjusting screw and the center of the piston are respectively provided with a through hole, and the two through holes communicate with each other and are disposed at a position near the bottom end of the air guiding member. The pneumatic tool of claim 4, wherein the torsion adjusting unit is provided with an abutting member, the receiving groove is disposed at a top end of the muffler seat, and the exhausting portion is located in the receiving groove. The top side of the piston is located below the exhaust portion, and the abutting member is fixed to the top end of the adjusting screw and located above the exhaust portion. The pneumatic tool of claim 7, wherein the adjusting screw and the center of the piston are respectively provided with a through hole, and the two through holes are connected to each other and are disposed at a position near the bottom end of the air guiding member. A pneumatic tool having an effect of adjusting a rotational speed and a torque according to any one of claims 2, 3, 6, and 8, wherein the intake passage is connected to an external air compressor. The pneumatic tool according to claim 6 or 8, wherein the adjusting screw is connected to an external external fitting, and the external fitting can be a counter or a pressure gauge.