TWM563328U - Forward-reverse rotation valve control of pneumatic tool - Google Patents

Abstract

The forward and reverse valve control of the pneumatic tool provided by the new model is mainly composed of a housing, a forward and reverse valve, a copper sleeve, a gear, an upper pusher and a lower pusher, and the forward and reverse valve is directly driven by the upper pusher. The forward rotation position and the lower pusher directly drive the forward and reverse rotation valve to the reverse rotation position. Compared with the conventional technology, the new type effectively simplifies the high-pressure gas flow path and greatly improves the output efficiency of the pneumatic tool. The zigzag air passage formed by too many parts, so it is relatively cost-effective to use, and the user does not need to increase the pressure of high-pressure gas for use.

Description

Forward and reverse valve control of pneumatic tools

The present invention relates to a pneumatic tool, in particular to a forward and reverse valve control of a pneumatic tool.

Please refer to FIG. 1, which is one of the “Push-type forward and reverse valve structure of pneumatic tools” No. 200642807 of the Republic of China. It mainly uses two pushers 1 to cooperate with the setting of a rotary link 2 To achieve a state of interlocking action, and the unique feature is that the two pushers 1 can communicate with the pressure relief channel 3 and the air inlet channel 4 of the pneumatic tool, respectively, and can be pressed by one hand Convenient, to achieve the purpose of switching pneumatic tools forward and reverse.

However, although the above-mentioned pneumatic tool can provide the purpose of switching the forward and reverse of the pneumatic tool by the two pushers 1, this design is not only required to process the actuator cylinder 5 and the lower tank during manufacture, wherein the actuator cylinder 5 is inside A vane rotor 6 needs to be installed. In addition, the left and right sides of the bottom of the actuating cylinder 5 are respectively provided with forward rotation air guide holes, and the reverse rotation air guide holes are respectively arranged to the left of the lower tank chamber. The guide groove and the right guide groove communicate vertically. Therefore, the manufacturing cost is relatively increased. Furthermore, when the left pusher is pushed, the high-pressure gas must first pass through the air hole of the right pusher and the reverse rotation of the right side of the cylinder 5. The air intake guide hole, the actuating cylinder 5, the forward rotation air intake hole on the left side of the actuating cylinder 5, the pressure relief groove of the left pusher, and the exhaust guide hole of the left guide groove are finally discharged through the exhaust groove on the left side of the main casing. Therefore, the blade rotor 6 constituting the pneumatic tool is in a rotation mode. This design causes high pressure gas to generate pressure loss between the tortuous air passages, slots and the like, so that the high pressure gas flowing into the cylinder 5 cannot provide the leaf. Rotor 6 has sufficient torque to reduce output efficiency relatively , So that the user must increase the pressure of the high pressure gas, to replace a large pneumatic torque tool use, or for increasing the volume of the cylinder 5 and the like, will increase the relative costs and inconvenience of use.

Therefore, how to solve the above-mentioned problems and deficiencies is the direction of the new type of research and improvement.

In view of the shortcomings of the above-mentioned conventional technology, the present invention provides a forward and reverse valve control of a pneumatic tool, which mainly simplifies the flow path of the air pressure inside the pneumatic tool, thereby achieving the purpose of improving output efficiency.

In order to achieve the aforementioned purpose, the present invention relates to a forward and reverse valve control of a pneumatic tool, including:

A shell containing a pneumatic space;

A forward and reverse valve, which can be rotatably provided in the pneumatic space between a forward rotation position and a reverse rotation position, and has a meshing hole and a through hole communicating with the meshing hole;

A copper sleeve is sleeved on the forward and reverse valve, and has a forward rotation perforation and a reverse rotation perforation. When the forward and reverse rotation valve is in the forward rotation position, the forward rotation perforation communicates with the through hole. When the valve is in the reverse position, the reverse perforation communicates with the through hole;

A gear capable of driving the forward-reverse valve to be rotatably provided in the meshing hole, and having a tooth portion protruding from the meshing hole, the tooth portion having a first tooth portion region, and a tooth portion connected to the first tooth portion region Second tooth region;

An upper pusher capable of urging the gear to be rotatably disposed in the first tooth region, and having an upper push-through portion penetrating the housing and driving the forward and reverse valve to the forward rotation position; and

The lower pusher can push the gear to be rotatably disposed in the second tooth portion area, and has a lower pusher portion located on the same side of the upper pusher portion and driving the forward-reverse valve to the reverse position.

Preferably, the tooth portion has a plurality of positioning grooves, and the forward and reverse valve control of the pneumatic tool further includes a steel ball, a spring element, and a screw, the screw is penetrated in the housing, and the steel ball is provided in the pneumatic The inner and outer surfaces of the space are pressed against the tooth portion, the spring element is disposed between the steel ball and the screw, one end of the spring element is pressed against the steel ball to be clamped in one of the plurality of grooves, and the other end is pressed against the screw.

Preferably, the forward and reverse valve has an air inlet hole, the air inlet hole communicates the through hole and the meshing hole, and the forward and reverse valve control of the pneumatic tool includes an opening and closing pin, and the opening and closing pin is convexly provided with a cover that can cover the Covered part of the air inlet.

Preferably, it further comprises an O-ring, which is arranged in the aerospace space and pressed by one end of the copper sleeve, so that the O-ring abuts between the casing and the copper sleeve.

According to this, the forward and reverse valve control of the pneumatic tool provided by the present invention is mainly composed of a housing, a forward and reverse valve, a copper sleeve, a gear, an upper pusher and a lower pusher, and the positive pusher directly drives the positive and negative The reverse valve is turned to the forward position and the lower pusher directly drives the forward and reverse valve to the reverse position. Compared with the conventional technology, the new type effectively simplifies the path of high-pressure gas flow and greatly improves the output efficiency of pneumatic tools. There are no zigzag air passages formed by too many parts inside the tool, so it is relatively cost-effective to use, and users do not need to increase the pressure of high-pressure gas or replace a pneumatic operator with a large torque to use.

Please refer to FIG. 2 to FIG. 10. The embodiment of the present invention provides a forward and reverse valve control of a pneumatic tool, which is mainly composed of a housing 20, a forward and reverse valve 30, a copper sleeve 40, a gear 50, an upper The pusher 60 and the pusher 70 are composed of:

The casing 20 includes a pneumatic space 21; in this embodiment, the casing 20 also includes a front cover 22 and a closed cover 23 capable of being locked with the front cover 22, and the pneumatic space 21 is It is located inside the front cover 22, wherein the closing cover 23 is a thin design. Through the thin design of the closing cover 23, under the appearance condition of maintaining the wall thickness strength of 3mm and the arc curved surface, compared with the prior art, the new type is shortened. The total length of the pneumatic tool is 106mm, which makes it easy to work in a small space. In addition, as shown in FIG. 5 to FIG. 6, the front cover 22 also has an intake flow passage 24 communicating with the pneumatic space 21 and an exhaust flow passage 25 communicating with the pneumatic space 21, wherein the high-pressure gas is supplied by The airflow passage 24 enters, passes through the pneumatic space 21, and drives a driving motor 170 located in the casing 20 to rotate, and the exhaust high-pressure gas is discharged from the exhaust flow passage 25.

The forward / reverse valve 30 is rotatably provided in the pneumatic space 21 between a forward rotation position P1 and a reverse rotation position P2, and has a meshing hole 31 and a through hole 32 communicating with the meshing hole 31; this embodiment In the example, the forward and reverse valve 30 has an air inlet hole 33, which communicates with the through hole 32 and the engagement hole 31. One end of the forward and reverse valve 30 is the engagement hole 31, and the other end is the air inlet hole. 33, the through hole 32 is located between the engaging hole 31 and the air inlet hole 33. The forward and reverse valve control of the pneumatic tool includes an opening and closing pin 80. The opening and closing pin 80 is convexly provided with a cover that can cover the air inlet hole 33. Covering portion 81.

The copper sleeve 40 is sleeved on the forward-reverse valve 30 and disposed in the pneumatic space 21, and has a forward-reverse perforation 41 and a reverse-reverse perforation 42. When the forward-reverse valve 30 is in the forward-rotation position, The forward rotation perforation 41 is in communication with the through hole 32. When the forward and reverse valve is in the reverse position P2, the reverse rotation perforation 42 is in communication with the through hole 32. In this embodiment, the copper sleeve 40 includes an air exhaust hole 43.

The gear 50 is capable of driving the forward-reverse valve 30 to be rotatably provided in the meshing hole 31 and has a tooth portion 51 protruding from the meshing hole 31. The tooth portion 51 has a first tooth portion area 511 and a connection. The second tooth region 512 of the first tooth region 511.

The upper pusher 60 is capable of pushing the gear 50 to be rotatably disposed in the first tooth portion 511 and has an upper push-through portion that penetrates the housing 20 and drives the forward and reverse valve 30 to the forward rotation position P1. 61.

The lower pusher 70 can push the gear 50 to be rotatably disposed in the second tooth section 512, and has a lower position on the same side of the upper pusher 61 and drives the forward and reverse valve 30 to the lower position of the reverse position P2. Pushing portion 71; in this embodiment, the upper pusher 60 and the lower pusher 70 are disposed at a distance from each other, and the upper pusher 60 and the lower pusher 70 are disposed on the same side, providing a convenient and stable operation And more flexible one-handed switching pneumatic tools.

Please refer to FIG. 3 to FIG. 5. In this embodiment, the assembling method of the housing 20 from far to near includes a trigger 90, a spring pin 100, a pushing spring 110, a dust cover 120, the The gear 50, the forward-reverse valve 30, the copper sleeve 40, the opening-closing pin 80, and an O-ring 130. The opening / closing pin 80 is in the shape of a pole, and one end is combined with the trigger 90 through the spring pin 100. The trigger 90 is used for manual pressure to open the air pressure flow path, and a space is provided between the trigger 90 and the gear 50. distance. The pushing spring 110 is disposed between the trigger 90 and the gear 50. Through the spring of the pushing spring 110, the trigger 90 can return to the state before the initial unpressing. The dust cover 120 covers one end of the forward and reverse valve 30 and the copper sleeve 40 and abuts against the gear 50. Through the installation of the dust cover 120, dust or dust in the air is prevented from falling into the casing during the operation of the pneumatic tool. 20, to avoid affecting the accuracy of use and prolong the service life, at the same time, the dust cover 120 can also effectively prevent the iron debris from running into the gear 50, the upper pusher 60 and the lower pusher 70 to avoid causing the gear 50 Risk of getting stuck. The O-ring 130 is disposed in the aerospace 21 and is pressed against one end of the copper sleeve 40, so that the O-ring 130 abuts between the housing 20 and the copper sleeve 40 and passes through the O-ring 130. It is arranged to achieve a sealing effect so that high-pressure gas cannot easily flow into the pneumatic space 21.

Please refer to FIG. 3 and FIG. 6. In this embodiment, the tooth portion 51 has a plurality of positioning grooves 513. The forward and reverse valve control of the pneumatic tool further includes a steel ball 140, a spring element 150, and a screw 160. A screw 160 is inserted in the housing 20, the steel ball 140 is disposed in the aerospace space 21 and the outer surface of the steel ball 140 is pressed against the tooth portion 51. The spring element 150 is disposed between the steel ball 140 and the screw 160, and one end thereof is springed. The steel ball 140 is clamped in one of the plurality of grooves 513 and the other end is pressed against the screw 160.

Please refer to FIG. 7, FIG. 8, and FIG. 9. In this embodiment, the casing 20 further includes a forward air duct 26 and a reverse air duct 27. The forward air duct 26 and the reverse air duct 27 Disconnected. When the user pushes the upper pusher 60, the lower pusher 70 moves out of the housing 20 due to the push of the upper pusher 60, and the forward and reverse valve 30 is driven to turn to the forward rotation position P1. The forward rotation perforation 41 is in communication with the through hole 32 and the forward rotation air duct 26. At this time, the reverse rotation perforation 42 and the through hole 32 are disconnected from each other; see FIG. 5, FIG. 8, and FIG. 9, The high-pressure gas will sequentially pass through the inlet flow passage 24, the through hole 32, the forward rotation perforation 41, the forward rotation air passage 26, the exhaust hole 43, and the exhaust flow passage 25, and at the same time, switch to the positive flow passage When turning to position P1, a small amount of exhaust air is also reversed through the reversed air passage 27, the reversed perforation 42 is reversed perforated, the exhausted hole 43, and the exhausted flow path 25 are discharged, thereby constituting the driving motor. 170 is the forward rotation mode.

Please refer to FIG. 6 and FIG. 10. In this embodiment, when a user pushes the lower pushing member 70, the upper pushing member 60 moves outside the casing 20 due to the pushing of the lower pushing member 70. The forward and reverse valve 30 is driven to the reverse position P2, and the reverse perforation 42 is in communication with the through hole 32 and the reverse air duct 27. At this time, the forward perforation 41 and the through hole 32 are disconnected from each other; Please refer to FIG. 5, FIG. 6, and FIG. 10, the high-pressure gas will sequentially pass through the intake flow passage 24, the through hole 32, the reverse perforation 42, the reverse air passage 27, the exhaust hole 43, and the exhaust gas. At the same time, when switching to the reverse position P2, a small amount of exhaust air also reverses the flow path through the forward rotation air path 26, the reverse rotation perforation 41 reverses the perforation, the exhaust hole 43, the exhaust The flow path 25 is discharged, thereby constituting a mode in which the driving motor 170 is reversed.

The above is the configuration description of the main components of the embodiment of the present invention. As for the use and efficacy of the new model, the following description will be made.

By the above-mentioned technical means, the present invention can improve the rotation efficiency. The through-hole 32 of the forward-reverse valve 30 and the forward-reverse perforation 41 or the reverse-reverse perforation 42 of the copper sleeve 40 alternately cooperate and communicate with each other. In the prior art, the cost required for manufacturing can be relatively reduced. In addition, after the high-pressure gas enters through the intake passage 24, it can pass through the forward and reverse valve 30 and the copper sleeve 40 to drive the motor 170. The driving effectively simplifies the flow path of the high-pressure gas, and reduces the tortuous path, so that the high-pressure gas has more space for flow, and the high-pressure gas is more stable and smooth. Further, the driving motor 170 has sufficient torque to drive, greatly Improve the output efficiency of pneumatic tools.

In addition, the new design of the push-type forward and reverse switch makes its operation closer to the original one-handed design concept, which is quite ergonomic. The gear and rack design reduces the cost of mold opening and improves the complexity of the conventional structure. It can be modularized, which can facilitate modular mass production and achieve the purpose of saving assembly man-hours and costs.

In summary, the above-mentioned embodiments and drawings are merely preferred embodiments of the present invention. When the scope of implementation of the present invention cannot be limited by it, all equal changes and modifications made in accordance with the scope of the patent application of the new model shall be Within the scope of this new patent.

﹝ Xizhi
1‧‧‧ pusher
2‧‧‧ Linkage
3‧‧‧ pressure relief runner
4‧‧‧Inlet runner
5‧‧‧ Actuator
6‧‧‧blade rotor (the present invention)
P1‧‧‧ forward position
P2‧‧‧Reverse position
20‧‧‧shell
21‧‧‧pneumatic space
22‧‧‧ front cover
23‧‧‧ Closure cover
24‧‧‧Inlet runner
25‧‧‧Exhaust runner
26‧‧‧ forward turning wind tunnel
27‧‧‧Reverse wind tunnel
30‧‧‧ Forward and reverse valve
31‧‧‧ meshing hole
32‧‧‧through hole
33‧‧‧Air inlet
40‧‧‧Copper sleeve
41‧‧‧ forward rotation
42‧‧‧ reverse perforation
43‧‧‧Exhaust vent
50‧‧‧ Gear
51‧‧‧Tooth
511‧‧‧first tooth area
512‧‧‧second tooth area
513‧‧‧ positioning groove
60‧‧‧up pusher
61‧‧‧Upward Arrival Department
70‧‧‧ pusher
71‧‧‧ Downward Arrival Department
80‧‧‧ opening and closing pin
81‧‧‧ Covering Department
90‧‧‧ trigger
100‧‧‧ spring pin
110‧‧‧ push against spring
120‧‧‧ dust cover
130‧‧‧O-ring
140‧‧‧steel ball
150‧‧‧ spring element
160‧‧‧Screw
170‧‧‧Drive the motor

FIG. 1 is one of the drawings of a "Push-type forward and reverse valve structure of a pneumatic tool" of the Republic of China Patent No. 200642807. FIG. 2 is a perspective assembled view of the embodiment of the present invention. FIG. 3 is an exploded view of the embodiment of the present invention. FIG. 4 is a perspective view of a partial member of the embodiment of the present invention. Fig. 5 is a sectional view of a side view of the embodiment of the present invention. FIG. 6 is a sectional view of a front view of the embodiment of the present invention, showing a combination of a steel ball, a spring element, and a screw. FIG. 7 is a schematic diagram of the embodiment of the present invention, showing the switch to the forward rotation position. FIG. 8 is a cross-sectional view of the embodiment of the present invention, showing the action of pressing the upper pusher. FIG. 9 is a cross-sectional view of a front view of the embodiment of the present invention, showing that the forward rotation perforation communicates with the through hole. FIG. 10 is a cross-sectional view of a front view of the embodiment of the present invention, showing that the reverse perforation communicates with the through hole.

Claims (4)

A forward and reverse valve control of a pneumatic tool includes: a housing containing a pneumatic space; a forward and reverse valve that is rotatably provided in the pneumatic space between a forward rotation position and a reverse rotation position, and has an engagement hole And a through hole communicating with the meshing hole; a copper sleeve is sleeved on the forward and reverse valve, and has a forward rotation perforation, and a reverse rotation perforation, when the forward and reverse rotation valve is in the forward rotation position, the forward rotation The perforation communicates with the through hole, and when the forward and reverse valve is in the reverse position, the reverse perforation communicates with the through hole; a gear capable of driving the forward and reverse valve to be rotatably provided in the meshing hole, and has a protrusion that A tooth portion of the meshing hole, the tooth portion having a first tooth portion area and a second tooth portion area connected to the first tooth portion area; an upper pushing member capable of urging the gear to be rotatably disposed on the first tooth And a pushing part which penetrates the casing and drives the forward / reverse valve to the forward rotation position; and a lower pushing member, which can push the gear to be rotatably disposed in the second tooth section, and has The pushing portion located on the same side of the drive is reversed and transferred to the valve abutment portion of the push-down reversal position. The forward and reverse valve control of the pneumatic tool according to claim 1, wherein the tooth portion has a plurality of positioning grooves, and the forward and reverse valve control of the pneumatic tool further includes a steel ball, a spring element, and a screw. In the housing, the steel ball is disposed in the aerospace and the outer surface of the steel ball is pressed against the tooth portion. The spring element is disposed between the steel ball and the screw. One end of the spring ball is against the steel ball and is locked in one of the plurality of grooves. , The other end is pressed against the screw. The forward and reverse valve control of the pneumatic tool according to claim 1, wherein the forward and reverse valve has an air inlet hole, the air inlet hole communicates the through hole and the meshing hole, and the forward and reverse valve control of the air tool includes an opening and closing A pin, and the opening and closing pin is convexly provided with a covering portion capable of covering the air inlet hole. The forward and reverse valve control of the pneumatic tool according to claim 1, further comprising an O-ring, which is arranged in the pneumatic space and is pressed by one end of the copper sleeve to make the O-ring abut against Between the shell and the copper sleeve.