TWI621508B - Pneumatic tool for displaying cylinder pressure - Google Patents

Abstract

The invention relates to a pneumatic tool capable of displaying cylinder pressure, the pneumatic tool is provided with a display device, and the display device is connected with a cylinder of the pneumatic tool, so that the air pressure of the high pressure gas entering the air motor can reach the display device. The display device is visible through a window disposed in one of the pneumatic tools, so that the staff can clearly know the air pressure in the cylinder from the outside of the pneumatic tool to determine whether the pneumatic tool is operating at an appropriate working pressure.

Description

Pneumatic tool that can display cylinder pressure

The invention relates to a pneumatic tool, in particular to a pneumatic tool provided with a pressure display device. Through a window, the staff can clearly know the air pressure in the cylinder when using the pneumatic tool, and provide a judgment as to whether the pneumatic tool is used. The basis for operation under normal working pressure.

According to the pneumatic tools, the tools are powered by high-pressure gas, and they are used in various fields. They are widely used in various fields. For example, in the case of a screw-on screw component, the vehicle tire is screwed or screwed or bolted. When the component is connected, the pneumatic tool, that is, the pneumatic wrench, is used to achieve the screwing or screwing action of the screwing component. For the safety requirements, we now attach great importance to the locking torque of the vehicle tires. If the vehicle tires do not reach the locking torque, it will be very dangerous. If the tires fall off during driving, not only the driver, the passengers and the vehicle have Danger, even more afraid of causing traffic accidents, the consequences are unimaginable. However, if the bolt is locked too tightly and will damage the structure of the bolt itself, it will cause the bolt to be damaged or broken and the tire is separated from the vehicle body, which is also unsafe. In the past, it was unscientific and inaccurate to judge the tightness of the pneumatic wrench to the nut or bolt screw by the skilled technician. Therefore, it is important for such a power vehicle or similar mechanical device involving mass safety to lock the screwing member with an appropriate torque.

The factors affecting the output torque of the pneumatic tool include the If the air pressure of the cylinder is too large, the torque of the output will be too large. Conversely, if the air pressure in the cylinder has not reached the ideal pressure, the output torque will be insufficient. However, the conventional technique does not know the air pressure inside the pneumatic tool, and it is impossible to judge whether the pneumatic tool operates under normal pressure.

In view of the above situation, the inventors invested a lot of time to research relevant knowledge, and compared various advantages and disadvantages, research and development of related products, and after many experiments and tests, and finally improved the above-mentioned missing, in order to meet the needs of the public.

The main object of the present invention is to provide a pneumatic tool capable of displaying cylinder pressure. The pneumatic tool is provided with a pressure display device, and a window allows a worker to clearly know the magnitude of the air pressure used and provide an output function for discriminating the pneumatic tool. Whether the force is appropriate to ensure the correct torque of the threaded components. Through the invention, the general staff can determine whether the bolt is appropriate, can improve the safety of the tire assembly, and can improve the conventional experience of using the pneumatic tool only depends on the experience of the technician, because there is no basis And can't be accurately missing.

Therefore, in order to achieve the above object and effect, the present invention provides a pneumatic tool for displaying cylinder pressure for providing a pressure display function for locking a bolt, and the pneumatic tool is provided with a display device, wherein: the pneumatic tool The utility model has a body, a pneumatic motor and an output mechanism, wherein the air motor and the power output mechanism are disposed in the body, the power output mechanism is connected to the air motor; the air motor comprises: a cylinder; a rotor is disposed at the a cylinder chamber of the cylinder; the display device has: a body, an actuating member, an elastic member and a display The seat system is disposed in the body, has a displacement space and a through hole; the cylinder chamber of the cylinder communicates with the displacement space through the through hole; the actuating member is disposed in the displacement space, and the displacement is Displacement in the space; the elastic element is disposed between the actuating member and the seat body, and the elastic energy thereof causes the actuating member to be displaced toward the first end of the displacement space; when the air pressure in the cylinder chamber enters the displacement space through the through hole And driving the actuating member to the second end of the displacement space; the display area of the display device is exposed on a wall of the body, and the display area is interlocked with the actuating member.

Thereby, the operator can clearly see the display area from the outside of the body to determine whether the pneumatic tool is at a normal working pressure.

Preferably, a window is disposed on the body; the display area corresponds to the window.

Preferably, the display area is attached to the peripheral surface of the actuator.

Preferably, the display device further comprises: a display panel connected to the actuating member; the display area is disposed on the peripheral surface of the actuating member.

Preferably, the display area is marked with a plurality of display blocks respectively indicating the air pressure in the cylinder of the pneumatic tool, and the display block exposed by the display panel can be clearly seen from the outside of the body.

Preferably, the display area is provided with three color display blocks of yellow, green and red. When the yellow display block is viewed from the window, the working pressure in the cylinder chamber is too small, and when the green display block represents the cylinder from the window The working pressure in the room is appropriate. When the red display block is viewed from the window, the working pressure in the cylinder chamber is too large.

A further technical feature of the present invention is that the window is attached to the The rear end of the body opens a window hole, and a lens group is disposed at the window hole to provide an amplification function.

1‧‧‧ pneumatic tools

11‧‧‧Ontology

11a, 11b‧‧‧ front and rear housings

12‧‧‧Air motor

121‧‧‧ cylinder

122‧‧‧Cylinder room

123‧‧‧Rotor

124‧‧‧ shaft

125‧‧‧ bearing

126, 127‧ ‧ gap

13‧‧‧Power output shaft

14‧‧‧ grip

15‧‧‧Operation switch

16‧‧‧ accommodating space

17‧‧‧Intake passage

2‧‧‧Display device

21‧‧‧ body

211‧‧‧ displacement space

212‧‧‧through hole

213‧‧‧ vacant

214‧‧‧ 塞盖

22‧‧‧Operator

23‧‧‧Flexible components

24‧‧‧ display board

241‧‧‧Connecting Department

242 (242a, 242b, 242c) ‧ ‧ display blocks

25‧‧‧Window

251‧‧‧ window hole

252‧‧‧ lens

26‧‧‧ leakproof ring

In order to enable the reviewing committee to further enhance the object, the features and the achievable effects of the present invention, the following two preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings in which: A perspective view of a pneumatic tool of the preferred embodiment with the rear end facing up.

2 is a perspective cross-sectional view of a pneumatic tool in accordance with a preferred embodiment of the present invention.

Figure 3 is a perspective view of a display panel of a display device in accordance with a preferred embodiment of the present invention.

The fourth figure is a cross-sectional view of the second figure and shows that the display device is in a display position.

The fifth diagram is similar to the fifth diagram, and is another actuation diagram of the present invention, showing that the display device is located in another display device.

Figure 6 is a cross-sectional view showing a second preferred embodiment of the present invention.

Referring to the first embodiment, a pneumatic tool for displaying cylinder pressure is provided by a preferred embodiment of the present invention, and an air wrench is taken as an example. However, the technology provided by the present invention can be applied to Various types of pneumatic tools. The pneumatic tool 1 is provided with a display device 2, wherein: please refer to the first and second figures, the pneumatic tool 1 has: a body 11; a pneumatic motor 12, a power output mechanism (in this embodiment, a power output shaft 13) And an operation switch 15 is disposed on the body 11, the body 11 is composed of a front housing 11a and a The rear housing 11b is composed of an inner accommodating space 16 for accommodating the air motor 12 and the power output shaft 13. The air motor 12 has a cylinder (which is a cylinder) 121 and is mounted on the cylinder. The rotor 123 in the cylinder chamber 122 of the 121 includes a rotating shaft and a plurality of blades, and the front end of the rotating shaft 124 extends out of the cylinder 121. The rear end of the power take-off shaft 13 is coupled to the rotating shaft 124 of the air motor 12 and is driven by the air motor. A grip 14 is disposed under the body. The bottom of the grip 14 is provided with an air inlet passage 17 for connecting to a pneumatic source (not shown). One end of the intake passage 17 is connected to the cylinder 121 of the air motor 12. The high pressure gas of the air pressure source is allowed to flow into the cylinder 121 to drive the rotor 123 to rotate.

The operation switch 15 is disposed between the body 11 and the grip 14. Pressing the operation switch 15 allows the high pressure gas of the air pressure source to enter the cylinder 121 to drive the air motor 12 to operate, thereby interlocking the power output. The shaft 13 rotates. In use, the power take-off shaft 13 is fitted with a sleeve (not shown) to sleeve a bolt or a nut. The operation switch 15 can switch the direction of the conveying path of the high-pressure gas to change the rotation direction (forward rotation or reverse rotation) of the rotor 123 of the air motor 12, that is, the operation of tightening or unscrewing the nut or the bolt can be achieved; The structure and operation mode of the pneumatic tool 1 are not the main subject of the present invention, and there is no more rumor.

Referring to the second and fourth figures, the display device 2 of the present invention is disposed at the rear casing 11b, and has a body 21, an actuating member 22, an elastic member 23, a display panel 24 and a Window 25.

The seat body 21 is disposed in the accommodating space 16 and is located at the rear end of the air cylinder 121 of the air motor 12. In this embodiment, the seat body 21 is disposed on the rear end surface of the cylinder 121 and is adjacent to the first end. A bearing 125 pivotally connects the rear end of the rotating shaft 124. The seat body 21 is internally provided with a displacement space 211; a through hole 212 is disposed in the base body A peripheral surface of one side of the 21, a through-hole 213, is provided on the other side of the seat body 21. One end (for example, the rear end) of the through hole 212 communicates with one end (first end) of the displacement space 211, and the other end (for example, the front end) directly or indirectly communicates with the cylinder chamber 122 of the cylinder 121 of the air motor 12. Referring to the fourth embodiment, in the embodiment, the cylinder chamber 122 communicates with the front end of the through hole 212 via a gap 126 between the rotating shaft 124 and the rear end of the cylinder 121 and a gap 127 between the inner and outer rings of the bearing 125. The air pressure in the cylinder 121 is transmitted from the through hole 212 into the displacement space 211 of the seat body 21. It should be noted that the communication path between the cylinder chamber 122 and the through hole 212 is not limited to the embodiment, and a separate flow path is disposed inside the body 11 or the cylinder 121 to communicate with the displacement space. Holes are also a choice for implementation. As long as the air pressure in the cylinder chamber 122 can enter the flow path of the seat body 21, the present invention can be implemented.

The displacement space 211 is recessed from one end of the base body 21 to the other end, and has an opening, and the elastic member 23 and the actuating member 22 are sequentially inserted, and then the opening is closed by a plug cover 214; The member 22 is received in the displacement space 211 and is supported by the elastic member 23 at one end. The elastic energy of the elastic member 23 maintains the actuating member 22 against the first end of the displacement space 211. According to the fourth figure, the first end of the displacement space 211 is located at the left end of the base 21. When the high pressure gas in the cylinder chamber 121 enters the displacement space 211 through the through hole 212, the actuator 22 is pushed to the second end of the displacement space (ie, the right end of the seat body). The elastic member 23 of the embodiment is elastically disposed on the second end of the actuating member 22; the first end of the actuating member 22 corresponds to the through hole 212, and the outer diameter of the first end of the actuating member is made. Small, after the high pressure gas flows into the displacement space 211, the displacement of the actuator is smoothly pushed from the first end of the actuator. The actuating member 22 and the inner wall surface of the displacement space 211 are kept airtight so that the gas in the displacement space does not leak.

The display panel 24 is disposed on one side peripheral surface of the base body 21, and is located between the seat body 21 and a wall surface of the body 11 (for example, a wall surface of the rear end of the body), and is slidable. Referring to the third and fourth figures, the display panel 24 has a connecting portion 241 which passes through the hollow portion 213 of the base body 21 and is connected to the actuating member 22, and the display panel 24 can be actuated. The piece 22 is driven to shift left and right. The display panel 24 is provided with a display area, and the display area is marked with a number of display blocks 242 for displaying the air pressure in the cylinder chamber 122 of the pneumatic tool 1 (to be described later).

The window 25 is disposed on one wall surface of the body 11 and faces the base body 21. Preferably, the base 21 is disposed at the rear end of the cylinder 121, and the window 25 is disposed on the wall surface of the rear end of the body 11, and corresponding to the position of the display panel 24, the outside of the body 11 can be clearly seen. The display area exposed by the display panel 24 is obtained. According to this, the staff can clearly know the air pressure of the pneumatic tool 1 used, and provide the discriminating whether the air pressure of the pneumatic tool 1 when locking the screwing component is appropriate, and it is ensured that the screwing component is driven by the appropriate torque. Improve the safety of tire assembly.

The pneumatic tool provided by the present invention can display the pressure in the cylinder. Referring to the fourth figure, the window 25 is formed with a window hole 251 at the rear end of the body 11, and a lens 252 is disposed at the window hole 251. The zooming function can be provided, so that the display block 242 on the display panel 24 can be clearly seen by the worker when the hand grip 14 is screwed; the display panel 24 is provided with, for example, but not The yellow, green, and red color display blocks 242a-c, the yellow display block 242a represents that the air pressure in the cylinder chamber is small, the green display block 242b represents the air pressure in the cylinder chamber 123, and the red display block 242c represents The air pressure in the cylinder chamber 123 is large. When the pneumatic tool 1 is used, when the high pressure gas enters the cylinder chamber 122 of the air motor 12 by the high pressure gas, and the rotor 123 and the power output shaft 13 are driven, the pressure of the high pressure gas also passes from the through hole 212. Entering the displacement space 211, and pushing the actuating member 22 to interlock the displacement of the display panel 24, therefore, if the displacement distance of the actuating member 22 to the second end of the displacement space 211 is small, the operator can see the display panel from the window 25. The yellow display block 242a of 24 indicates that the pressure in the cylinder chamber 122 is small, and the nut or the bolt is required to continue to be screwed by the pneumatic tool 1; when the pressure of the high pressure gas pushes the actuator 22 to a medium distance The operator will see the green display block 242b from the window 25, indicating that the pressure in the cylinder chamber 122 is appropriate, the working pressure of the pneumatic tool 1 is normal, and the nut or bolt is driven with an appropriate torque. When the air pressure in the cylinder is large, the air pressure of the high pressure gas will push the actuator 22 to the second end of the displacement space 211 for a longer distance. As shown in the fifth figure, the operator views the display panel from the window 25. The red display block 242c of 24, knowing that the working pressure in the cylinder chamber 122 is too large, the user must immediately stop the screwing of the screwing member of the pneumatic tool 1, and if necessary, switch the operating switch 15 to make the air motor 12 reverse rotation will loosen the screw element moderately.

In addition, the open end of the seat body 21 is provided with an internal thread, and the plug cover 214 is provided with an external thread. When the elastic member 23 and the actuating member 22 are sequentially inserted, the external plug of the plug cover 214 can be The internal thread of the opening is screwed and locked to seal the displacement space 211. Moreover, in order to provide a better airtight effect, a leakage preventing ring 26 may be sleeved on the outer circumferential side of the seat body 21 adjacent to the bearing 125.

The sixth embodiment is a second preferred embodiment of the pneumatic tool provided by the present invention, and the same components are denoted by the same reference numerals. The pneumatic tool 1 also includes a body 11 , a pneumatic motor 12 , a power output mechanism (power output shaft 13 ), and a display device 2 .

The display device 2 of the present embodiment has a body 21, an actuating member 22, an elastic member 23 and a window 25, but does not have the display panel 24 of the previous embodiment. The display blocks 242 (242a, 242b, and 242c) of the display area are directly disposed on the circumferential surface of the actuator 22, and correspond to the window 25 via the through-hole 213. Thereby, when the pneumatic tool is operated, the air pressure in the cylinder chamber 122 enters the displacement space 211 to urge the actuator 22 to be displaced; the operator sees the display block 242 of one color from the window 25 to know the cylinder. Is the working pressure normal? The body can be made transparent to the area corresponding to the display.

Looking at the above description of the present invention, by adding the display device 2 to the pneumatic tool 1, the pneumatic working force can display the air pressure in the cylinder, so that the display area can be pushed and exposed by the display area. The color display block 242 in the window 25 correspondingly knows the magnitude of the torque of the power output shaft 13 to drive the screwing element, and determines whether the torque of the pneumatic tool 1 is correct for the locking bolt or the nut. As long as the yellow display block 242a, or the green display block 242b or the red color display block 242c is displayed according to the window 25, the general staff can determine whether the working pressure of the pneumatic tool is normal or not. Too large or insufficient, so it is ensured that the torque of the pneumatic tool to the bolt or nut is appropriate and correct, and the safety of the tire assembly is improved, and the structure of the bolt itself is not afraid to be broken, and the service life of the bolt is prolonged, thereby ensuring the vehicle and the instrument. Safety, and also improve the conventional use of pneumatic tools can only rely on the experience of the technical staff, inaccurate defects, the present invention Display of the cylinder pressure pneumatic tool can reach the desired goal to the invention, it does have better practicability.

The above is only a preferred embodiment for explaining the present invention, and is not intended to limit the invention in any way, so that any modifications relating to the present invention are made in the spirit of the same invention. Or the changer, other types that can be implemented and have the same effect, should still be included in the intention of the present invention. Within the scope.

In summary, the present invention can display a cylinder pressure pneumatic tool, which is completely in line with the development of the industry in terms of structural design, practicality and economic benefit, and the disclosed structural invention has an unprecedented innovative structure. And has practical effects, and apply in accordance with the law.

Claims (10)

A pneumatic tool capable of displaying cylinder pressure, the pneumatic tool is provided with a display device, wherein: the pneumatic tool has: a body, a pneumatic motor and an output mechanism, the body has an accommodation space; the air motor and the power An output mechanism is disposed in the accommodating space, the power output mechanism is coupled to the air motor; the air motor includes: a cylinder having a cylinder chamber therein; a rotor disposed in the cylinder; the display device having: a body, an actuating member, an elastic member and a display area; the seat system is disposed in the accommodating space and corresponds to the air motor, and has a displacement space and a through hole provided in one of the wall surfaces of the displacement space, The through hole communicates with the displacement space; the cylinder chamber of the cylinder communicates with the displacement space through the through hole; the displacement space has a first end and a second end; the actuating member is disposed in the displacement space, and Displaceable in the displacement space; the elastic element is disposed between the actuating member and the seat body, and the elastic energy thereof causes the actuating member to be displaced toward the first end of the displacement space; When the air pressure in the room enters the displacement space through the through hole, the actuating member is pushed to the second end of the displacement space; the display area of the display device is exposed on one wall surface of the body, and when the actuating member is displaced, The display area is shifted in linkage. A pneumatic tool capable of displaying cylinder pressure as described in claim 1, wherein the display device comprises: a window disposed on a wall of the body; the display area corresponding to the window. A pneumatic tool capable of displaying cylinder pressure as described in claim 2, wherein: the display area is disposed on the actuating member. The display device further includes: a display panel connected to the actuating member and displaced by the actuating member; the display area is disposed on the pneumatic tool capable of displaying the cylinder pressure as described in claim 2 display board. The pneumatic tool capable of displaying cylinder pressure according to any one of claims 1 to 4, wherein the display area is provided with a plurality of display blocks. A pneumatic tool capable of displaying cylinder pressure as described in claim 4, wherein: a wall surface of the base body is provided with a vacant space; and the display panel and the actuating member are connected via the permeable portion. The pneumatic tool for displaying cylinder pressure according to any one of claims 1 to 4, wherein the through hole is located at the first end of the seat. A pneumatic tool capable of displaying cylinder pressure according to any one of claims 1 to 4, wherein: a bearing is disposed at a rear end of the cylinder of the air motor; the seat system is located at a rear side of the air motor; The bore corresponds to the bearing and communicates with the cylinder chamber of the air motor via a gap in the interior of the bearing. A pneumatic tool capable of displaying cylinder pressure as described in claim 5, wherein the display area is provided with display blocks of at least two colors. A pneumatic tool capable of displaying cylinder pressure as described in claim 2, wherein the window is opened at a rear end of the body; a lens is disposed in the window.