TWI260255B - Pneumatic tool with safety operation - Google Patents

Abstract

A pneumatic tool with safety operation includes: a body having a channel formed therein, through which fluid flows for driving a cylinder in the body to rotate; a press switch provided on the body, the switch sealing the channel under a normal state; a trigger provided on the body for activating the switch; and further comprising a slide slidably provided on the body, the slide being provided with a link, the slide being at a location for offsetting the link from the switch under the normal state, such that to start the pneumatic tool, a user must push the slide aside in order to move the link to a location above the switch, such that the link is driven to activate the switch while the trigger is depressed.

Description

1260255 _____ V. INSTRUCTION DESCRIPTION (1) [Technical Field] The present invention relates to a pneumatic tool that functions with a pneumatic tool, and can avoid erroneous [previous technique] τ, conventionally, a small gas control, the trigger system It is set on the bottom surface of the grinding machine body. This grinding is used by hand. During operation, just press the trigger down to activate. When the user wants to change the difference to order the replacement. Since the replacement is triggered to the trigger, if the operator touches the trigger when it is replaced, the switch will be activated. Even if the accidental touch panel machine is not replaced by the grinding disc, the user can also fly the dust of the small pneumatic grinder. [The present invention] The present invention aims to solve the safety problem of the above-mentioned missing tool, which can be used as a tool. The danger. The pneumatic work provided by the present invention can also effectively eliminate the grinding pass, and in particular refers to a person who has a safety touch switch and causes injury. The grinding machine is open to the top surface of the main body of the board machine, and the grinding machine is designed to have a small volume, which is suitable for holding the grinding machine body with the hand, and the palm opening switch will grind the power input grinding machine. In the process of holding the grinding disc of the grinder body, it is quite easy to touch the conduit of high pressure gas before the grinding, and the grinding disc will rotate to damage the operation of the operation. It is known that the pneumatic grinder is still vulnerable to injury. There is no dust collection equipment, so the environment is polluted. The main purpose of the loss is to provide a means of preventing the occurrence of a false touch trigger and starting the pneumatic tool, in addition to the dust generated by the danger of preventing accidental contact with the switch.

Page 4 1260255 V. DESCRIPTION OF THE INVENTION (2) [Embodiment] In order to enable the reviewing committee to further understand the object, features and effects of the present invention, a preferred embodiment of the present invention will be described below with reference to the drawings. DETAILED DESCRIPTION OF THE INVENTION The following is a schematic view of the first embodiment of the present invention as a perspective view of a preferred embodiment of the present invention. The second drawing is an exploded perspective view of the first figure. The third figure is a cross-sectional view taken along line 3-3 of the first figure. 4 is a rear perspective view of the fourth line taken along line 4-4 of the third figure. Figure 5 is a cross-sectional view taken along line 5-5 of the fourth figure. Figure 6 is a cross-sectional view taken along line 6-6 of the third figure. The seventh picture is a perspective view of the adjustment button. The eighth drawing is a longitudinal sectional view of the preferred embodiment at the tubular body. The ninth diagram is similar to the third diagram, showing the state in which the sliding member is displaced backward. The tenth figure is similar to the ninth figure, showing the state in which the push switch is activated. The eleventh figure is the bottom view of the first figure. Referring first to Figures 1 and 2, a preferred embodiment of the pneumatic tool of the present invention is a pneumatic grinder (10). The shape of the grinder is the same as that of the conventional one, and it has a compact configuration, but its construction is different from the conventional one. The utility model comprises: a body (20), comprising a main part (2 1) and an extension part (2 2 ) connected to the rear of the main part, and a guiding groove (23) formed at least in the main part (2 1 ) ) on the two sides of the circumference. A cylinder chamber (25), such as the third and fourth figures, is disposed in the main portion (21) for mounting a cylinder (26) and a rotor (28) located in the cylinder. In addition, there is a chamber (30) in the body, as shown in the third and sixth figures,

Page 5 1260255 V. DESCRIPTION OF THE INVENTION (3) The top portion of the extension portion (2 2 ) is recessed inwardly; an alcove (32), such as the fifth and sixth figures, is recessed inwardly from the side of the extension portion. A first-class channel (3 5 ) and a venting hole (38), as in the fourth figure, are disposed at the extending portion (22), and the front ends of the two (35) (38) are both connected to the cylinder chamber (25) ), and the back end is located at the back end of the extension (2 2 ) to communicate with the outside world. Referring to the fifth figure, in the embodiment, the flow channel (35) includes: a first hole portion (351) through which the self-extension portion passes; and a second hole portion (352) , as shown in the sixth figure, the chamber and the chamber (30) are connected; the third hole portion (353), as shown in the second figure, extends from the chamber (30) toward the main portion (21) and upwardly, and Connected to a cover (2 1 2 ) provided on the top surface of the main portion ( 2 1 ) to communicate with a fourth hole portion ( 354 ), which is connected to the air inlet of the cylinder ( 26 ) (27) Connected, therefore, the south pressure gas flows into the gas red via the flow path (3 5 ). The cylinder peripheral surface is provided with a plurality of exhaust ports (29). As shown in the fourth figure, the gas entering the cylinder is discharged to the cylinder chamber through the exhaust ports (29). In (25), the exhaust hole (38) is discharged. a pressing switch (40), such as the third and sixth figures, including a valve member (42) having a valve portion (4 4 ) and a rod portion (4 6 ) connected to the valve portion, the valve member The system is disposed in the chamber (30) and can be displaced up and down; a tubular portion (47) is adhered to the chamber. The bottom end of the tubular portion (47) is formed with a shoulder surface (471) located in the chamber, and the shoulder surface (471) is located at the second hole portion (gw) and the second hole portion (3 53) of the flow channel. The valve portion (4 4 ) is located below the shoulder surface (4 71). An elastic member (48) is disposed between the bottom surface of the chamber (30) and the valve portion (μ). Under normal conditions, the elastic energy of the valve member (4 2 ) is pushed up to the top. Point, the leak ring (45) provided on the peripheral surface of the valve portion is in close contact with the shoulder surface

1260255 V. Inventive Note (4) (4 7 1 ), and then cut off the flow path (3 5 ). Therefore, when the push switch (40) is in the closed position, the flow path is rendered non-conductive. The rod portion (46) penetrates through the through hole (4 7 2 ) provided at the top end of the cylindrical portion (47). An adjustment button (5 0 ), please refer to the seventh figure, having a cylindrical valve body (52) and a button (5 5) connected to one end of the valve body; the valve body (5 2 ) is free The end of the end is provided with a shaft hole (5 3 ), and the circumferential surface is radially formed with an elongated shape, and the opening (54) communicates with the shaft hole (53), and the width of the opening (54) is It is incremented from one end to the other end. The valve body (52) of the adjusting button (5 〇) is installed in the recess (30) in a gastight manner, as in the fifth and sixth figures, the shaft hole (53) is directly The second hole portion (3 5 2 ) is opposite to the hole portion (3 5 1 ) of the flow path (3 5 ), as shown in the fifth figure. The button (5 5 ) is located on the outside for the operator to rotate the valve body (52). A sliding member (60), please refer to the second and third figures, which are mounted on the guiding groove (23) of the main portion (2 1 ) and can be slipped after the rhyme. The sliding member disclosed in this embodiment has a U-shaped front half portion (62) and a rear half portion (64), and the two halves are hooked by a hook portion (65) located on the cantilever thereof. Then integrated, sub-scattered in the guide groove (23). An elastic member (6 6 ) is inserted into the recessed hole (2 1 1 ) of the front end surface of the main portion (2 1 ), one end abuts the main portion and the other end abuts against the front end of the front half portion (62) On the abutting portion (63), the sliding member (6〇) is held before the slipping stroke before being pressed by the external force, (6) the third figure, & time, the rear half of the sliding member (64) The inner edge is positioned against the body and is positioned at a non-actuating position. a platform (β 7 ) extending rearward from the rear end of the rear half (6 4 ), and a bottom surface of the platform (67) is provided with a recessed groove (βγι), as shown in the sixth figure, the connection is not required for the extension Part (22) top rail (24); by the guide (24)

Page 7 1260255 V. INSTRUCTIONS (5) ---- Guide, the sliding member can also be displaced back and forth; a perforation (68) runs through the top surface of the platform (6 7). a linkage member, which is a contact rod (6 9 ), is threaded through the perforation (6 8 ) of the platform (67) and can be moved up and down; the diameter of the contact rod (6 9 ) and the perforation (6 8 ) In the case where the large and small diameter structures are not counted, the large diameter portion is paid to the small diameter portion of the perforation as the upper end of the contact rod, so that the contact rod does not go up. Take out the perforation. In the normal state, the top end of the stem protrudes from the platform (67) at an appropriate height, and the bottom end falls on the top surface of the extension (2 2 ). When the slip member (60) is in the non-actuated position, the stem (69) has a one-dimensional difference from the valve member (42) of the push switch, as shown in the third figure. A transfer sheath (70), made of rubber, is sleeved on the top of the main part (2 1 ) of the body, and the sliding member (60) is covered to provide dustproof effect and increase the grip on Comfort at the top of the body (2 〇). The rear end of the sheath (7 〇 ) has a notch (72) that exposes the platform (67) from the notch (72). a trigger (80), the rear end of which is pivotally disposed on a pair of lugs (201) at a rear end of the body (20), and can be swung in a range of angles; a torsion spring (82) is disposed on the body and Between the triggers, the two ends of the trigger are respectively pressed against the body and the trigger, so that the trigger is kept up. In addition, a rear end (22) of the extension portion (22) of the body (20) is provided with a set of ports (85) (86) corresponding to the flow passage (35) and the exhaust hole (38), as shown in the fourth figure, corresponding to The sleeve of the flow passage (85) is for connecting a gas conduit; and the sleeve (86) corresponding to the venting opening is provided with a nozzle (88). A tube body (90), please refer to the fourth and eighth figures, one end of which is fixed at the rear end of the extension portion, and the nozzle (88) is located in the tube body (90); the tube body (9〇)

Page 8 1260255

V. INSTRUCTIONS (6) The rear end extends more appropriately from the nozzle (89) of the nozzle (8 8 ). a ball valve joint (1 0 0 ) having a ball valve body (1 〇 2 ) and a joint (丨〇 6), the ball valve body (1 0 2 ) internally providing an axial through hole (1 〇 3 ), One end is a connecting end (104) connected to the end of the tube body (90); and the other end is a @2-ball valve part (105) protruding from the outside of the tube body. A ball hole (108) is disposed at the front end of the joint (106), and is sleeved on the ball valve portion (1 〇 4), whereby the joint is unidirectionally rotatable on the ball valve portion. The joint (1 〇 6) is for connecting an exhaust duct.

In addition to the above configuration, the bottom end of the body (20) of the grinder is a cover (丨丨〇) as shown in the first and eighth figures; and a grinding disc (not shown) is detachably connected to the eccentric of the grinder. The rotating shaft (11 2 ) is driven by the rotor (28) of the cylinder (26); at the same time, the grinding disc is covered by the cover (11 Q ). a connecting pipe (115); connected to the cover (110) and the pipe body (9〇), the connecting pipe is continuously connected by a pipe body extending from the bottom side of the pipe body (9 〇) 6) and a pipe body (Π 7 ) extending from the outer wall of the cover is inserted so that the inside of the cover and the pipe body are in communication. The connecting pipe (1 15) is connected to the pipe body (90) to form a port dig), which is located at the nozzle (89) of the nozzle; and the connecting pipe (115) is connected to the cover. A second port (119).

The state of use of the present invention is as follows: In the normal state, as shown in the third figure, the trigger (80) is lifted up, and the slip member (60) is subjected to the ejector of the elastic member (6 6). Located in the non-actuated position, the stem (69) and the valve member (42) of the push switch (40) have a one-dimensional difference. At this time, the push switch (40) is in the closed position, so the flow passage (35) is not conductive. In the state, the grinder does not act.

Page 9 1260255

When the grinder is to be started, the user grasps the main body (2 〇) and presses the sliding member (60) backward. As shown in the ninth figure, the sliding member is displaced backward to an actuating position. The rod (69) is displaced to the positive side of the push switch and aligned with the valve member (42). Then press the trigger (80) down with the palm of the hand. As shown in the tenth figure, the pressing part (8 4 ) of the bottom surface of the trigger pushes the contact rod (6 9 ) downward, so that the contact rod extends into the tube portion (47). a hole (472) that moves the valve member (42) downward in an open position,

Then, the valve portion (44) leaves the shoulder surface (47 〇, the airtight state of the leakage preventing ring (45) and the shoulder surface is released, and the flow passage (35) is in a conducting state. The high pressure gas flows into the 々丨1 road ( 3 5 ), the first hole portion (3 5 1 ) flowing through the flow channel flows into the concave chamber (3 2 ), and flows into the opening hole (54) and the shaft hole (53) of the regulating slave (50), from the second The hole portion (3 5 2 ) flows into the chamber (3 〇); the high pressure gas reflows to the third hole portion (3 5 3 ) and the fourth hole portion (354), and the air inlet port (27) from the cylinder (26) It flows into the cylinder and drives the rotor (28) to rotate, so that the grinding disc can be driven to grind or polish the object.

After the high pressure gas drives the rotor, the exhaust port (29) from the cylinder flows into the gas chamber (25), and is discharged from the vent hole (38). As shown in the eighth figure, the exhaust gas is ejected through the nozzle (88). And flowing into the pipe body (90), and then flowing back into the exhaust pipe connected to the ball valve joint (1 〇〇) to discharge. After releasing the pressing force applied to the trigger (80) and the sliding member (60), the trigger is reset by the action of the torsion spring (82); the valve member (42) of the pressing switch (40) is subjected to the elastic member (48) The push top returns to the closed position, and the flow path is cut off; the slip member (60) is returned to the state of the third figure by the elastic energy of the elastic member (6 6 ).

Page 10 1260255

V. INSTRUCTIONS (8) If the sliding member (60) is not pressed backward during operation, the lever (6趵-closed valve member (42)# holds the position difference, & even if the pressure is pressed 胄^ off ( 40), by which it can provide - insurance function. ... The knife moves to open the runner (3 5) when the passage is able to turn the current Xuan Nian 1 々々 force / "A, the valve body (52) angular position , (2) to adjust the τ, 夕楚一^ Γ its large diameter end or small diameter end to Ϊ 2 ( 3 5 1 ), so that the high gas can be adjusted into the cylinder (2 6) machine to control The speed of the grinding machine is as follows: The pneumatic tool provided by the invention has a safety function, and if the sliding member is not pushed backward, the pressing switch cannot be touched when the trigger is pressed. The power source is removed, and when the user accidentally touches the trigger under the replacement of the grinding disc or other abnormal operating conditions, it does not start to avoid injury to the personnel. During the use of the machine, the discharged gas passes through the nozzle (8 8 ) After spraying, it flows rapidly in the tube body, and at the nozzle (89) of the nozzle, the flow rate is fast and the pressure is small. Referring to the eleventh figure, the outer periphery of the cover (11〇) is provided with a plurality of guiding ribs (丨丨丨) at appropriate intervals, and the guiding ribs (111) have the function of guiding the airflow. The gas in the range covered by the cover can be active, and the air flow generated when the grinding disk rotates can be guided by the guiding rib to flow to the second port (119) of the connecting pipe (115). The generated dust sub-flow flows with the air flow. The pressure at the first port (118) is small due to the injection of the nozzle (88), and the pressure at the second port (11 9) is large. With the siphon principle, the fluid will flow from the pressure to the pressure, and the airflow and dust inside the cover will pass through

Page 11 1260255 V. INSTRUCTIONS (9) The pilot (115) is directed to the first port (118) and is discharged along with the exhaust gas discharged from the nozzle. It can be seen that the present invention has a self-priming function, and the effect of the pressure difference can attract the dust during the grinding, so that the grinding machine also has a dust collecting effect without the need for a dust collecting device. In addition, the ball valve joint (1 0 0) can be rotated at any angle. During operation, the exhaust pipe and the ball valve joint can be appropriately deflected according to the change of the operating angle to prevent the exhaust pipe from being bent and the exhaust gas is blocked. The situation. Φ Further, the present invention allows high pressure gas to enter from the top end of the cylinder, which makes the cylinder chamber easy to manufacture and easy to install the cylinder. It should be noted that the adjusting button is not a necessary component; in addition, the flow sequence of the high-pressure gas does not flow through the adjusting button and then flows through the switch, and may also flow through the switch and then flow into the adjusting button. Φ

Page 12 1260255 BRIEF DESCRIPTION OF THE DRAWINGS The first drawing is a perspective view of a preferred embodiment of the present invention. The second drawing is an exploded perspective view of the first figure. The third figure is a cross-sectional view taken along line 3-3 of the first figure. 4 is a rear perspective view of the fourth line taken along line 4-4 of the third figure. Figure 5 is a cross-sectional view taken along line 5-5 of the fourth figure. Figure 6 is a cross-sectional view taken along line 6-6 of the third figure. The seventh figure is a perspective view of the adjustment knob. The eighth drawing is a longitudinal sectional view of the preferred embodiment at the tubular body. The ninth diagram is similar to the third diagram, showing the state in which the sliding member is displaced backward. The tenth figure is similar to the ninth figure in FIG. 5 showing the state in which the push switch is activated. The eleventh figure is the bottom view of the first figure.

1260255 Schematic description of the figure: Simple description: Pneumatic tool (1 〇) Main body (20) Main part (2 1 ) Extension part (2 2 ) Guide groove (23) Guide (24) Cylinder chamber (25) Air inlet ( 2 7 ) Exhaust port ( 2 9 ) Chamber (30) Alcove (32) Flow path (35) Hole (35 1) (352) (35 3 ) ( 354) Vent (38) Push switch (4 0 ) Valve (42) Valve (44) Rod (46) Tube (47) Shoulder (471) Through Hole ( 472) Elastic (4 8 ) Control (5 0 ) Body (52 ) Shaft hole (5 3 ) Opening (54) Button (5 5 ) Sliding member (60) Front and rear half ( 62 ) ( 64) Elastic element (6 6 ) Platform (67) Insert groove (671) Perforation (68) Linkage (6 9 ) Jacket (70) Trigger (8 0 ) Nozzle (88) Nozzle (89) Body (90) Ball Valve Connector (1 〇〇) Ball Body (102) Through Hole (1 0 3 Ball valve part (1 0 5 ) Connector (1 0 6 ) Spherical hole (1 0 8 ) Cover (110) Shaft (11 2 ) Connecting tube (115) Port (118) (119)

Page 14

Claims (1)

I: -r ·· >· ·- ·· ..,,··-;.ν·.Ό Λ,,ν.·· · VI. Patent application scope: 1. A pneumatic tool with safety function, including There are: - a body cylinder t ' is disposed in the body for installing a gas red; a "flow path" is disposed in the body, one end of which is connected to the cylinder chamber to communicate with the cylinder; and the other end is located a peripheral surface of the body for introducing a high gas into the cylinder; a pressing switch disposed in the body and communicating with the flow channel; the push switch being actuatable between an open position and a closed position, the pressing When the switch is not touched, the flow path is closed in the closed position; a sliding member is disposed on the body to be horizontally displaced between an actuating position and a non-actuating position; Displacement is connected to the sliding member. When the sliding member is in the non-actuating position, the linking member has a difference from the pressing and opening relationship; when the sliding member is in the actuating position, the linking member is moved Positioned above the switch, corresponding to the switch; trigger, pivoted at one end The body can be swung up and down within a certain angle range, and when the sliding member is in the actuating position, the trigger can touch the linking member; thereby, when the sliding member is displaced in the actuating position, the trigger is pressed: The linkage is moved downward to switch the switch to the open position, and the melon is in a conducting state. When the sliding member is in the inactive position, the trigger is not pressed and the switch cannot be activated. The pneumatic escort of the first item according to Item 1, wherein the sliding member and the upper and lower shells are pierced, and the linking member is a contact rod, and is inserted into the through hole t in a manner that does not come out. When the linkage does not touch the switch, the top 1260255 fr < i · 2.7 end protrudes from the top surface of the sliding member. 3. The pneumatic tool according to the scope of claim i, further includes An elastic member is disposed between the sliding member and the body, and the elastic energy is such that the sliding member is maintained in the non-actuating position in a normal state. 4. As described in claim 1 a pneumatic tool, wherein the circumferential surface of the body has a horizontal guiding groove; The slidable member is slidable along the guide groove so as not to be detached, and can be slid along the guide groove. 5. The pneumatic tool according to claim 4, wherein: the guide groove is at least = The circumferential surface of the two sides of the body; the sliding member has a U-shaped half mouth (5 and - the rear half, the two halves are hooked by the cantilever front ends of the two sides, and are embedded in In the guide groove. ^Proposed to the range of the ^ the range of the pneumatic escort, shot: the system and the horizontal direction of the rail; the slidable part is embedded in the guide and can be displaced along the rail. The pneumatic tool according to the item: wherein: the system has a main portion and an extension connected to the rear of the main portion; and is disposed on the top surface of the extension portion. The back end of the sliding member is provided - a flat mouth "the bottom surface of the platform is provided - a groove, the socket 8. The fitting according to the application item, wherein the body surface of the rail is provided with a chamber, the pressing switch, Including the top=piece: the airtight manner is disposed in the chamber, and the second: the shifting has a top dead center; an annular shoulder is formed on the elastic component, and is disposed in the reading Between the pieces H, push the piece up to the top dead center 'to make _ county 赖 ^ ^ = page 16 1260255 ^ -, Q ' · -. ? ^ . >; - one; r .一—t - .....yu· . . , . The flow path is in a non-conducting state. 9. The pneumatic tool of claim 8, wherein the valve body further comprises: a rod portion connected to the valve portion; the push switch further comprises: the crotch portion has an axial penetration a hole that is tightly fitted into the chamber; the rod portion extends through the through hole of the tube portion; the linkage member is pressed against the rod portion when the switch is cut. The pneumatic tool of claim 9, wherein the bottom portion of the tubular portion has an appropriate distance from the bottom surface of the chamber and the shoulder surface is formed. The pneumatic tool of claim 2, wherein: the system has a main portion and an extension connected to the rear of the main portion; the pressing relationship is disposed in the extension portion; the slip The rear end of the piece is provided with a platform on the top surface of the extension; the perforation is disposed on the platform. 2. The pneumatic tool of claim 1, wherein: the system is provided with an alcove that is in communication with the flow channel; and further comprises: an adjustment button having an inner hollow circle a cylindrical valve body and a button connected to one end of the valve body; an opening disposed on a peripheral surface of the valve body; in a radial direction of the valve body, a width of the opening is increased from one end to the other end; The valve body is installed in the recessed chamber in a gastight manner and is rotatable in the recessed chamber; the opening is in a position where the flow passage communicates with the recessed chamber; after the gas in the flow passage flows into the recessed chamber, It flows through the opening and the inside of the valve body and flows out of the recess to flow to the cylinder; the button is located outside the recess for the operator to dial. The pneumatic tool of claim 12, wherein: the body is provided with a chamber; the pressing relationship is disposed in the chamber; and the free end of the valve body of the adjusting button is concave a shaft hole is provided; the flow passage includes: a first hole, page 17 of the certificate _5 portion, penetrating from the peripheral surface of the body to the recess; a second hole portion connecting the recess chamber and the chamber; a three-hole portion connecting the chamber and the cylinder chamber; the opening of the adjusting button corresponds to the first hole portion; the shaft hole corresponds to the hole-hole portion. 14. The pneumatic tool of claim 1, further comprising: a soft sheath sleeved on the top end of the body to enclose the sliding member. 15. The pneumatic tool of claim 1, further comprising: a venting hole disposed at a predetermined portion of the body, one end connected to the cylinder chamber' and the other end being electrically connected to the outside; The gas is discharged from the venting hole; a nozzle is disposed in the body to communicate with the venting hole; the nozzle of the nozzle is outwardly facing; a tube body having one end fixed to the peripheral surface of the body; The nozzle is located in the tube body; the free end of the tube body protrudes outwardly from the nozzle of the nozzle by an appropriate length; a cover is fixed to the bottom end of the body; and a connecting tube is connected to the cover And the pipe body, the cover is communicated with the pipe body; the communication pipe is connected to the pipe body to form a port, and the port is located at the position of the nozzle. The pneumatic tool of claim 15, wherein the outer periphery of the cover is provided with a predetermined number of flow guiding ribs at appropriate intervals. " 17. The pneumatic tool according to claim 15 of the patent application, further comprising a ball valve joint, an I-ball valve body and a joint; an axial through hole disposed inside the ball valve body, The ball valve body-end is connected to the free end of the pipe body, and the 18th page 1260255: .. '--.一.,).,,, the other ball valve portion is exposed outside the pipe; The front end of the joint has a spherical hole and is sleeved on the ball valve portion. 18. The pneumatic tool of claim 1, wherein the top end of the cylinder is provided with an air inlet communicating with the flow passage. Page 19