TWI681841B - Dust-proof structure of pneumatic grinding device - Google Patents

Abstract

A dust-proof structure of pneumatic grinding device , is included : a main body set up a cavity body. An airflow connecting portion set up an air inlet and an air outlet, and the air inlet set up a press button. A pressing plate, connected to the pressure button to control the pressure button. A pneumatic motor located at the cavity body. A rotating disc set at the pneumatic motor. A rear end of the press button of the air inlet of the air flow connecting portion of the main body to the cavity body is provided with an assembling perforation connecting the outside, with a long pore shape and a block set end at the end. A check valve is disposed at the assembling perforation, and has a resist effect by corresponding to the block set end. Hereby, provided about dust-proof structure of pneumatic grinding device, means offset negative pressure generated when the grinding device stops rotating by connecting the inner space, to prevent the function of inhaling dust and moisture due to negative pressure.

Description

Dustproof structure of pneumatic grinding device

The invention relates to a dust-proof structure of an air-powered grinding device, in particular to a function that offsets the negative pressure generated when the grinding device stops rotating by communicating with the inner space, thereby preventing suction of dust and moisture due to negative pressure.

According to the press, nowadays, pneumatic tool related companies generally set up a dust suction structure on the grinding machine tool to prevent the dust from being scattered and stuck inside the machine tool by sucking the dust in the concentrated grinding process, but such implementation may be caused by rotation. Negative pressure causes dust to accumulate on the grinding disk and power components, and when it is used later, it may cause constant friction with the dust during rotation and gradually become hot, which is more likely to damage its internal components; moreover, the use of grinding tools The environment is not only dry grinding, it is more wet grinding, but it is more likely to cause moisture to enter due to negative pressure during use, resulting in rust, jamming, and failure of internal precision components. Increasing the frequency of maintenance is not only inconvenient and inconvenient. Increasing its use cost; therefore, more companies have developed a "grinding machine tool" (as shown in Figure 10) such as Taiwan Invention Patent No. I622460, which includes a grinder body 71 and a grinder connected to the grinder body 71 Plate 72, the grinder body 71 is provided with a pressure chamber 73 facing the grinding plate 72, and the The pressure chamber 73 is provided with an air inlet pipe 711, a pressure relief gap 74 communicating with the pressure chamber 73 is formed between the grinder body 71 and the grinding disk 72, the air inlet pipe 711 leads a high-pressure gas into the pressure The pressure chamber 73 is a positive pressure environment by the high-pressure gas. The high-pressure gas continues to be released by the pressure relief gap 74 to restrict external dust from entering the pressure chamber 73. In this way, the grinding machine can not only prevent dust from accumulating in the pressure chamber 73, but also can make the grinding machine implement wet grinding, which can effectively prevent moisture from entering the pressure chamber 73, so that the grinding machine The connection between the main body 71 and the grinding disc 72 is free from corrosion.

However, according to the above, it can be seen that although a dust collector is used to help collect and concentrate dust such as grinding and polishing operations in the use of pneumatic grinders, during the use process, because the pneumatic method is used to drive, the main shaft lies in rotation It will produce negative pressure and may suck the dust into the spindle. Long-term use will not only cause dust accumulation and jamming, but its efficiency of use will gradually decline, and its disassembly and sorting is very inconvenient, which will cause users trouble and enter the spindle The dust in the place is more likely to infringe the bearing, resulting in reduced smoothness of rotation, and the long-term accumulation of dust after grinding is more likely to deteriorate and agglomerate, causing damage to the bearing at the main shaft and requiring replacement. Taiwan’s invention No. I622460 "grinding" The "machine tool" is equipped with a pressure chamber 73 by the grinding disc 72 of the grinder body 71, and is continuously filled with high-pressure gas to prevent the intrusion of dust, but its structure replaces the dust-absorbing part with a positive pressure state, which cannot be sucked through the dust Concentrated dust must be used through other dust collection devices, so that the high-pressure gas is scattered from the inside to the outside during use, which is not in line with economic benefits. Therefore, for the development of the industry that constantly seeks new and changes Great room for improvement.

The inventor has taken this into consideration and based on many years of relevant experience in this field, Observation and research, combined with the use of academic principles, then propose a reasonable and effective improvement of the present invention.

The main purpose of the present invention is to provide a dust-proof structure for a pneumatic grinding device, in particular to a negative pressure counteracting when the grinding device stops rotating by communicating with the inner space, thereby preventing the function of suctioning dust and moisture due to negative pressure .

The dust-proof structure of the pneumatic grinding device of the present invention includes: a body with a cavity and an accommodating space inside: an air flow connection part with an air inlet and an air outlet, each of which is connected to the In the accommodating compartment of the cavity, the air inlet is provided with a pressing button, which is arranged at the upper end of the air inlet and connected to the inside, and is used for opening and closing the air inlet opening and closing; a pressure plate is passed through A shaft column is connected to the upper end of the air flow connection part, and is connected to the pressure button of the air inlet to control the pressure button; a pneumatic motor is pivotally arranged in the accommodating space of the cavity, which has A driving zone is provided on the upper end of the air motor and communicates with the air inlet and the air outlet, and the air supply flows in from the air inlet and flows out from the air outlet through the driving zone to drive the air motor to rotate; and a connecting part Is located at the bottom of the air motor; a rotating disk is provided with a connection end connected to the connection part of the air motor, characterized in that: the rear end of the pressure button of the air inlet of the air flow connection part of the body Until the cavity section is provided with a connecting perforation that communicates with the outside world, the connecting perforation is in the form of a long hole and a blocking end is provided at the end; a backstop device is pivotally provided at the connection perforation Displacement state, which has a stop end and a flow end, and has a resisting effect by corresponding the stop end and the blocking end, and when the air inlet is used for intake, the back pressure is caused by the air pressure The device is in a state of being set against the group of through holes.

A dust-proof structure of a pneumatic grinding device includes: a body, a cavity is provided, and an accommodating space is provided inside: an air flow connection part is provided with an air inlet and an air outlet, and each is connected to the cavity At the accommodating space of the body, and the air inlet is provided with a pressing button which is arranged at the upper end of the air inlet and connected The inner side is used for opening and closing the air inlet opening and closing; a pressure plate is connected to the upper end of the air flow connection part through a shaft column, and is connected with the pressure button of the air inlet to control the pressure button; A pneumatic motor is pivotally arranged in the accommodating space of the cavity, and has a driving area, which is arranged at the upper end of the pneumatic motor and communicates with the air inlet and the air outlet, for the air flow to flow into and from the air inlet The outflow of the air outlet through the driving zone drives the rotation of the air motor; and a connecting portion is provided at the bottom of the air motor; a rotating disk is provided with a connecting end connected to the connecting portion of the air motor, The utility model is characterized in that: the inner side of the air outlet of the air flow connection part of the body is provided with a group of through holes, the group of through holes is in the form of a long hole and a blocking end is provided at the end, and the pressing button and the In the middle of the cavity, to communicate between the air inlet and the air outlet; a check device, which is pivotally arranged at the group of perforations in a displaceable state, has a leak-off end and a circulation end, and The blocking end corresponds to the blocking end and has a blocking effect. When the intake port is supplied with air, the backstop device is in a blocking state at the connection hole through the air pressure; wherein the air motor A dust-proof device is further arranged between the connecting part and the rotating disk, which has an outer ring shell connected to the bottom end of the body; and a connecting tube connected to the side end of the outer ring shell; wherein the group The connecting hole is further arranged inside the air outlet and communicates with the outer end, for the air pressure of the driving zone to flow to the air outlet and return the air pressure to balance through the group of through holes; wherein a joint element is provided at the rear end of the air flow connection part, It has two pivot holes corresponding to the air inlet and the air outlet; when the joint element is provided, the pivot hole connected to the air inlet is further provided with a quick connector, which faces the air inlet The inner contact is provided with an anti-relief washer; an abutment piece is fixedly fixed by the anti-relief washer; a clamping spring is provided at one end of the abutment piece; and a joint head is provided at the joint element The pivot hole is provided for quick assembly of the airflow pipe; when the joint element is provided, a slow flow cover is provided at the outer end of the pivot hole connected to the air outlet, The supply air flow slows down the air flow rate when flowing out of the air outlet; wherein the air inlet is further provided with a regulating valve at the side end, which has a control end, is penetrated by the outer end of the air inlet, and is pivotally provided at the At the inner edge of the air inlet; and a dial button, which is provided at the outer end of the air inlet and connected to the control end; wherein the control end of the regulating valve is provided with a stop ring groove, and the air flow is connected The upper end of the part is further provided with a stop port corresponding to the stop ring groove, and a stop ring groove provided on the stop port and snapped against the control end of the regulating valve by a pin, so that the regulating valve is positioned and pivotally connected to At the air inlet; wherein the stop end of the check device is further provided with a stop ring, which is used to increase the tightness when it is set.

The effect of the present invention is that: the system is provided with a cavity, and an accommodating space is provided inside: an air flow connection part is provided with an air inlet and an air outlet, and each is connected to the accommodating space of the cavity At the space, the air inlet is provided with a push button, which is provided at the upper end of the air inlet and connected to the inside, and is used for opening and closing the air inlet opening and closing; a pressure plate is connected to the through a shaft column At the upper end of the air flow connection part, it is connected with the pressure button of the air inlet to control the pressure button; an air motor is pivotally arranged in the accommodating space of the cavity, which has a driving area, which is provided At the upper end of the air motor and communicated with the air inlet and the air outlet, the air supply flows into the air inlet and flows out of the air outlet through the driving zone to drive the air motor to rotate; and a connecting part is provided on the The bottom of the air motor; a rotating disk is provided with a connection end connected to the connection part of the air motor: and the rear end of the pressure button of the air inlet of the air flow connection part of the body is provided with the cavity section A group connection perforation communicating with the outside world, the group connection perforation is in the form of a long hole and a blocking end is provided at the end; a backstop device is pivotally arranged at the group connection perforation in a displaceable state, which has a stopper End and a circulation end, and has a resisting effect by corresponding the stop end to the blocking end, when the air inlet is used for air intake, the back stop device is resisted at the assembly perforation through the air pressure Set the state; and cause the air motor to generate negative pressure through the rotation of the inertia after stopping the intake, the stop end of the backstop device It is in an open state and communicates with the inner space to balance the negative pressure; so far, a dust-proof structure for a pneumatic grinding device is provided, especially a negative pressure generated when the grinding device stops rotating by communicating with the inner space, thereby preventing suction due to negative pressure The function of dust and water vapor.

〔this invention〕

1‧‧‧Body

10‧‧‧Protective Case

11‧‧‧ Cavity

111‧‧‧accommodation space

12‧‧‧Airflow connection

121‧‧‧Air inlet

1211‧‧‧Button

1212‧‧‧stop

122‧‧‧ Outlet

123‧‧‧Plug-through

1231‧‧‧ block end

124‧‧‧joining element

1241‧‧‧Pivot hole

125‧‧‧Quick joint

1251‧‧‧Block washer

1252‧‧‧ Arrival

1253‧‧‧Clamping spring

1254‧‧‧ joint head

126‧‧‧ Slow flow cover

13‧‧‧Press plate

131‧‧‧spindle

2‧‧‧Air motor

21‧‧‧ Driving Zone

22‧‧‧Connection

3‧‧‧rotating disc

31‧‧‧ Connected to the end

4‧‧‧Backstop device

41‧‧‧Stop

411‧‧‧Stop ring

42‧‧‧Circulation

5‧‧‧Dustproof device

51‧‧‧Outer ring shell

52‧‧‧Connecting pipe

6‧‧‧Regulating valve

61‧‧‧Control

611‧‧‧stop ring groove

612‧‧‧Connecting hole

62‧‧‧Dial

63‧‧‧bolt

〔Knowledge〕

71‧‧‧Grinding machine body

711‧‧‧ Intake pipe

72‧‧‧grinding disc

73‧‧‧ Pressure chamber

74‧‧‧ Pressure relief gap

Figure 1 is a perspective schematic view of the present invention.

Figure 2 is a schematic cross-sectional view of the present invention.

Figure 3 is an exploded view (1) of the present invention.

Fig. 4 is an exploded schematic view (2) of the present invention.

Figure 5 is a partial enlarged view (1) of the operating state of the preferred embodiment of the present invention.

Fig. 6 is a partially enlarged view (2) of the operating state of the preferred embodiment of the present invention.

FIG. 7 is a schematic cross-sectional view of another preferred embodiment of the present invention.

Fig. 8 is a partially enlarged view (1) of the operating state of another preferred embodiment of the present invention.

Fig. 9 is a partially enlarged view (2) of the operating state of another preferred embodiment of the present invention.

Figure 10 is a partial cross-sectional view of conventional knowledge.

In order for your reviewing committee to have a better understanding and understanding of the purpose, features and effects of the present invention, please refer to the following [Simple description of the drawings] for details as follows: Please refer to Figures 1 to 4 for The invention "dustproof structure of pneumatic grinding device" includes: a body 1, a cavity 11 is provided, and an accommodating space 111 is provided in the interior: an air flow connection The connecting portion 12 is provided with an air inlet 121 and an air outlet 122, and each communicates with the accommodating space 111 of the cavity 11, and the air inlet 121 is provided with a pressing button 1211, which is provided on the inlet The upper end of the air port 121 is connected to the inner side and is used for opening and closing the air port 121; a pressure plate 13 is connected to the upper end of the air flow connection part 12 through a shaft 131, and is connected to the air port 121 The pressing button 1211 is connected to control the pressing button 1211; a pneumatic motor 2 is pivotally arranged in the accommodating space 111 of the cavity 11 and has a driving area 21 which is arranged on the upper end of the pneumatic motor 2 and Communicating with the air inlet 121 and the air outlet 122, the air supply flows into the air inlet 121 and flows out of the air outlet 122 through the driving zone 21 to drive the air motor 2 to rotate; and a connecting portion 22 is provided on the The bottom of the air motor 2; a rotating disk 3 is provided with a connecting end 31 connected to the connecting portion 22 of the air motor 2, characterized by: the pressure of the air inlet 121 of the air flow connecting portion 12 of the body 1 From the rear end of the button 1211 up to the cavity 11, there is an assembly through-hole 123 communicating with the outside world. The assembly through-hole 123 is a long hole with a blocking end 1231 at the end; a backstop device 4 is pivotally provided It is in a displaceable state at the set of perforations 123, and it has a leak-off end 41 and a circulation end 42, and has a resisting effect by the leak-off end 41 corresponding to the blocking end 1231 for the inlet When the air port 121 is inhaled, the backstop device 4 is in the resisting state at the connecting hole 123 through the air pressure; with the above structure, the following is further explained as follows: wherein the connecting portion 22 of the air motor 2 and the A dustproof device 5 is further arranged between the rotating disks 3, and has an outer ring shell 51 connected to the bottom end of the body 1; and a connecting pipe 52 connected to the side end of the outer ring shell 51; wherein the The assembly perforation 123 is further provided inside the air outlet 122 and communicates with the outer end, for the air pressure of the driving zone 21 to flow to the air outlet 122 and return the equilibrium air pressure through the assembly perforation 123 ; The rear end of the air flow connection portion 12 is provided with an engagement element 124, which has two pivot holes 1241 corresponding to the air inlet 121 and the air outlet 122; wherein the engagement element 124 is provided, and the intake The pivot hole 1241 connected to the port 121 is further provided with a quick connector 125, which is provided with a stop washer 1251 toward the air inlet 121; a contact member 1252 is fixed by the stop washer 1251; A snap-in spring 1253 is set against one end of the set piece 1252; and a joint head 1254 is provided at the pivot hole 1241 of the joint element 124 for quickly assembling the air flow tube; the joint is provided At the time of the element 124, a slow flow cover 126 is provided at the outer end of the pivot hole 1241 connected to the air outlet 122 to slow down the air flow rate when the air flow flows out of the air outlet 122; wherein the air inlet 121 is further at the side end There is a regulating valve 6, which has a control end 61, which is penetrated by the outer end of the air inlet 121, and is pivotally arranged at the inner edge of the air inlet 121; and a dial 62 is provided at the inlet The outer end of the air port 121 is connected to the control end 61; wherein the control end 61 of the regulating valve 6 is provided with a stop ring groove 611, and the upper end of the air flow connection portion 12 is further provided with a stop ring corresponding to the stop ring The stop port 1212 of the groove 611 is provided in the stop port 1212 by a plug 63 and snaps against the stop ring groove 611 of the control end 61 of the regulating valve 6, so that the regulating valve 6 is positioned and pivotally connected to the inlet At the air port 121; wherein the stop end 41 of the check device 4 is further provided with a stop ring 411 to increase the tightness when resisting; in addition, the outer end of the body 1 is further provided with a protective sleeve 10, for stable gripping; through the above, please refer to Figure 5 to Figure 9, supplemented by Figures 3 to 4, as shown in this The preferred embodiment of the "dustproof structure of the dynamic grinding device" is described in detail as follows: The present invention is used for grinding and polishing, etc. The body 1 is provided with a cavity 11 and an accommodating space 111 is provided therein: An air flow connecting portion 12 is provided with an air inlet 121 and an air outlet 122, and each communicates with the accommodating space 111 of the cavity 11, and the air inlet 121 is provided with a pressing button 1211, which is provided in The upper end of the air inlet 121 is connected to the inner side and is used for opening and closing the air inlet 121; a pressure plate 13 is connected to the upper end of the air flow connection part 12 through a shaft 131 and connected with the air inlet The pressing button 1211 of 121 is connected to control the pressing button 1211; a pneumatic motor 2 is pivotally arranged in the accommodating space 111 of the cavity 11 and has a driving area 21 which is arranged on the pneumatic motor 2 The upper end is in communication with the air inlet 121 and the air outlet 122, and the air supply flows into the air inlet 121 and flows out of the air outlet 122 through the driving zone 21 to drive the air motor 2 to rotate; and a connecting portion 22 is provided At the bottom of the air motor 2; a rotating disk 3 is provided with a connecting end 31 connected to the connection portion 22 of the air motor 2 and the air inlet 121 of the air flow connection portion 12 of the body 1 From the back end of 1211 up to the cavity 11, there is an assembly through hole 123 communicating with the outside world. The assembly through hole 123 is a long hole with a blocking end 1231 at the end; a check device 4 is pivotally provided Displaceable at the set of through holes 123, it has a leakage end 41 and a circulation end 42, and has a resisting effect by the leakage end 42 corresponding to the blocking end 1231 for the inlet When the air port 121 is inhaled, the backstop device 4 is placed in the set through hole 123 through the air pressure; therefore, in use, the pressing button 1311 can be opened by pressing the pressing plate 13 to connect it High-pressure gas flows in, causing the air pressure to exhibit positive pressure and continuously driving the driving zone 21 of the air motor 2 to rotate, and the connecting portion 22 drives the rotating disk 3 to rotate and use it as grinding or polishing, and the high-pressure gas continues to The air outlet 122 flows out, and the anti-leakage end 41 of the backstop device 4 is further placed against the valve through the circulation of high-pressure gas The blocking end 1231 of the assembly hole 12 of the airflow connection portion 12 of the body 1 is in a closed state without deflation resulting in a pressure that is too low and the power drops, and when the user releases the pressure plate 13 to restore the pressure The button 1211 prevents the high-pressure gas from flowing, and the rotating air motor 2 continues to rotate due to inertia, resulting in a negative pressure inside. Therefore, the backstop device 4 is opened and connected to the air inlet 121 With the outside world, the pressure is further balanced, and the dust will not be sucked into the driving zone 21 from the rotating disk 3 due to the negative pressure, causing the components stuck between the driving zone 21 and the connecting part 22 to shorten the service life; According to another aspect of the present invention, the assembly hole 123 of the airflow connection portion 12 of the body 1 is further connected to the inside of the air outlet 122, and is further provided to the pressure button 1211 of the air inlet 121 and the cavity 11 in the middle, so as to communicate between the air inlet 121 and the air outlet 122, when the air inlet 121 is inhaled, the backstop device 4 is in the resisting state at the assembly through-hole 123 through the air pressure, thereby The assembly perforation 123 blocking the communication between the air inlet 121 and the air outlet 122; therefore, in use, the high pressure gas connected to it can be flowed in by pressing the pressure plate 13 to open the pressure button 1211, so that the air pressure is positive Press and continue to drive the driving zone 21 of the air motor 2 to rotate, and the connecting portion 22 drives the rotating disk 3 to rotate and use it as grinding or polishing, and the high-pressure gas continues to flow out of the air outlet 122, and the The anti-leakage end 41 of the backstop device 4 is further abutted against the blocking end 1231 of the assembly hole 123 of the gas flow connection portion 12 of the body 1 through the flow of high-pressure gas, so that it is in a closed state without deflation causing pressure The power is too low and the power drops. When the user releases the pressure plate 13 to restore the pressure button 1211, the high-pressure gas does not circulate, and the rotating air motor 2 continues to rotate according to inertia, resulting in a negative pressure inside. Generated, so that the backstop device 4 is in an open state, and connects the air inlet 121 and the air outlet 122 at both ends to further balance the pressure and circulate the air flow from the cavity 11 to the air outlet 122 To balance the pressure, Prevents negative pressure from sucking dust from the rotating disk 3 at the bottom end, which causes trapping and shortens the service life, which can further prevent the inflow of dusty air at the outer end; thus, through the above, the connection portion of the air motor 2 of the present invention The dustproof device 5 can be sleeved between 22 and the rotating disk 3, and connected to the bottom end of the body 1 through the outer ring shell 51, and the connecting pipe 52 is connected to the dust suction device, when dust is generated The dust is collected and concentrated by the installed dust suction device; in addition, in particular, the protective sleeve 10 can be provided at the outer end of the body 1 for the user to grip the protective sleeve 10 in use, To prevent the torque generated by the rotation from being transmitted to the body 1 and causing difficulty in gripping; furthermore, an engagement element 124 is provided at the rear end of the airflow connection portion 12, which has two pivot holes 1241 corresponding to the air inlet 121 And the air outlet 122; and the pivot hole 1241 for connecting the air inlet 121 is connected with the quick connector 125, which is placed in the air inlet 121 against the stop washer 1251, the abutting member 1252 , The snap spring 1253 and the joint head 1254, and the pipeline connected by the high-pressure gas can be used as a quick connector specification form, and is used for quickly assembling the air flow tube; and the pivot hole connected to the air outlet 122 At the outer end of 1241, the slow flow cover 126 can be further provided to slow down the speed of the air flow from the air outlet 122 to prevent the dust from being scattered around due to the air flow during grinding and polishing; and the air inlet 121 is further on the side The regulating valve 6 is provided at the end. The control end 61 is penetrated from the outer end of the air inlet 121 and pivoted at the inner edge of the air inlet 121. The control end 61 is further provided with the stop ring groove 611, and the upper end of the air flow connecting portion 12 is further provided with a stopper port 1212 for the plug 63 to be inserted into a set position, and the plug 63 is provided on the stopper port 1212 and snaps against the stop of the control end 61 of the regulating valve 6 The retaining ring groove 611 enables the regulating valve 6 to be pivotally connected to the air inlet 121 to Use the dial 62 to control the air intake of the control end 61, so that it can change the speed of the air motor 2 for different objects to be used for grinding; and the regulating valve 6 and the group of through holes 123 are in a state of resistance, and Furthermore, the check device 4 and the regulating valve 6 are in a corresponding state. Therefore, a control hole 61 of the regulating valve 6 is further provided with a communication hole 612, which connects the assembly through hole 123 and the air inlet 121, so that When the backstop device 4 is in the open state, the air inlet 121 and the air outlet 122 can be communicated through the communication hole 612; according to the above description, the effect of the present invention is that: the body 1 is provided with a cavity 11. An accommodating space 111 is provided in the interior: an air flow connecting portion 12, an air inlet 121 and an air outlet 122 are provided, and each communicates with the accommodating space 111 of the cavity 11 and the air inlet 121 is provided with a pressing button 1211, which is provided at the upper end of the air inlet 121 and connected to the inside, and is used for opening and closing the air inlet 121 to open and close; a pressure plate 13 is connected to the air flow connection through a shaft 131 The upper end of the part 12 is connected to the pressing button 1211 of the air inlet 121 to control the pressing button 1211; a pneumatic motor 2 is pivotally arranged in the accommodating space 111 of the cavity 11 and has a The driving zone 21 is provided at the upper end of the air motor 2 and communicates with the air inlet 121 and the air outlet 122. The air flow flows in from the air inlet 121 and flows out of the air outlet 122 through the driving zone 21 to drive the pneumatic The motor 2 rotates; and a connecting portion 22 is provided at the bottom of the air motor 2; a rotating disk 3 is provided with a connecting end 31 connected to the connecting portion 22 of the air motor 2: and the body 1 The rear end of the push button 1211 of the air inlet 121 of the airflow connection portion 12 is provided with a connecting hole 123 communicating with the outside of the cavity 11. The connecting hole 123 is a long hole and a stop is provided at the end End 1231; a backstop device 4, pivotally arranged at the connection hole 123 in a displaceable state, which has a leakage end 41 and a circulation end 42, and through the leakage end 41 and the blocking end 1231 corresponds to and has a resisting effect. When the backstop device 4 is in the resisting state in the assembly through-hole 123 due to the pressure, and the negative pressure is generated by the inertial rotation of the air motor 2 after the air intake is stopped, the stop end 41 of the backstop device 4 It is in an open state and communicates with the inner space to balance the negative pressure; so far, a dust-proof structure for a pneumatic grinding device is provided, especially a negative pressure generated when the grinding device stops rotating by communicating with the inner space, thereby preventing suction due to negative pressure The function of dust and water vapor.

In summary, when it is known that the present invention can indeed be widely used in related industries, it is extremely progressive and novel, and the invention has not been disclosed before the application, which has met the provisions of the Patent Law, and the invention patent application is filed according to the law. The Jun Bureau has made clear observations and granted patents.

However, the above are only the preferred embodiments of the present invention, which should not be used to limit the scope of the implementation of the present invention; that is, all equal changes and modifications made according to the patent application scope of the present invention should still belong to the present invention Within the scope of the patent.

1‧‧‧Body

11‧‧‧ Cavity

111‧‧‧accommodation space

12‧‧‧Airflow connection

121‧‧‧Air inlet

122‧‧‧ Outlet

123‧‧‧Plug-through

1231‧‧‧ block end

124‧‧‧joining element

1241‧‧‧Pivot hole

125‧‧‧Quick joint

126‧‧‧ Slow flow cover

2‧‧‧Air motor

21‧‧‧ Driving Zone

3‧‧‧rotating disc

4‧‧‧Backstop device

41‧‧‧Stop

411‧‧‧Stop ring

42‧‧‧Circulation

5‧‧‧Dustproof device

51‧‧‧Outer ring shell

6‧‧‧Regulating valve

Claims (10)

A dust-proof structure of a pneumatic grinding device includes: a body, a cavity is provided, and an accommodating space is provided inside: an air flow connection part is provided with an air inlet and an air outlet, and each is connected to the cavity In the accommodating space of the body, the air inlet is provided with a pressing button, which is arranged at the upper end of the air inlet and connected to the inside, and is used for opening and closing the air inlet opening and closing; a pressure plate is passed through a shaft column Assembled at the upper end of the airflow connection part, and connected with the pressure button of the air inlet to control the pressure button; a pneumatic motor is pivotally arranged in the accommodating space of the cavity, which has a driving Zone is located at the upper end of the air motor and communicates with the air inlet and the air outlet, and the air supply flows from the air inlet and flows out of the air outlet through the driving zone to drive the air motor to rotate; and a connecting part Located at the bottom of the air motor; a rotating disc is provided with a connecting end connected to the connection part of the air motor, characterized in that: the rear end of the pressure button of the air inlet of the air flow connection part of the body reaches the end The cavity section is provided with an assembly perforation that communicates with the outside world. The assembly perforation is in the form of a long hole and a blocking end is provided at the end; a check device is pivotally provided at the assembly perforation in a displaceable state. It has a relief end and a circulation end, and has a resisting effect by corresponding the relief end and the blocking end. When the air inlet is used for intake, the backstop device is placed in the Assembling perforation is in a state of resistance. A dust-proof structure of a pneumatic grinding device includes: a body, a cavity is provided, and an accommodating space is provided inside: an air flow connection part is provided with an air inlet and an air outlet, and each is connected to the cavity In the accommodating space of the body, the air inlet is provided with a pressing button, which is arranged at the upper end of the air inlet and connected to the inside, and is used for opening and closing the air inlet opening and closing; a pressure plate is passed through a shaft column Assembled at the upper end of the airflow connection part, and connected with the pressure button of the air inlet to control the pressure button; a pneumatic motor is pivotally arranged in the accommodating space of the cavity, which has a driving Zone, which is located at the upper end of the air motor and communicates with the air inlet and the air outlet, and the air supply flows from the air inlet and flows through the driving region from the air outlet Drive the air motor to rotate; and a connecting part is provided at the bottom of the air motor; a rotating disk is provided with a connecting end connected to the connecting part of the air motor, characterized by: the air flow of the body A group of perforations is provided on the inner side of the air outlet of the connection part, and the group of perforations is in the form of a long hole and a blocking end is provided at the end, and is located between the pressure button of the air inlet and the cavity to communicate with Between the air inlet and the air outlet; a backstop device is pivotally arranged at the group of perforations in a displaceable state, and has a stop end and a flow end, and the stop end and the end The blocking end has a resisting effect correspondingly, and when the intake port is used for air intake, the backstop device is in a resisting state in the assembly through-hole through air pressure. The dust-proof structure of the pneumatic grinding device according to claim 1 or 2, wherein a dust-proof device is further provided between the connection part of the pneumatic motor and the rotating disk, which has an outer ring shell and is connected to the bottom of the body End; and a connecting pipe connected to the outer ring shell side end. The dustproof structure of the pneumatic grinding device according to claim 1, wherein the group of perforations is further provided inside the air outlet and communicates with the outer end for the air pressure of the driving zone to flow to the air outlet and pass through the group of perforations Reflux equilibrium air pressure. The dustproof structure of the pneumatic grinding device according to claim 1 or 2, wherein a joint element is provided at the rear end of the airflow connection part, which has two pivotal holes corresponding to the air inlet and the air outlet. The dustproof structure of the pneumatic grinding device according to claim 5, wherein when the joint element is provided, a pivot joint is further provided at the pivot hole connected to the air inlet, which is provided with a An anti-relief washer; an abutment piece, which is clamped and fixed by the anti-leakage washer; a snap spring, which is abutted on one end of the abutment piece; and a joint head, which is provided at the pivot hole of the joint element , And for quick assembly of the air pipe. The dustproof structure of the pneumatic grinding device as described in claim 5, wherein when the joint element is provided, a slow flow cover is provided at the outer end of the pivot hole connected to the air outlet, for the air flow to flow from the air outlet Slow down the airflow speed when out. The dustproof structure of the pneumatic grinding device according to claim 1 or 2, wherein the air inlet is further provided with a regulating valve at the side end, which has a control end and is penetrated by the outer end of the air inlet It is arranged at the inner edge of the air inlet; and a dial button is arranged at the outer end of the air inlet and is connected to the control end. The dustproof structure of the pneumatic grinding device according to claim 8, wherein a stop ring groove is provided at the control end of the regulating valve, and a stop port corresponding to the stop ring groove is further provided at the upper end of the air flow connection part And, a plug is provided on the stop port and snaps against the stop ring groove of the control end of the regulating valve, so that the regulating valve is positioned and pivotally connected to the air inlet. The dustproof structure of the pneumatic grinding device according to claim 1 or 2, wherein the stopper of the check device is further provided with a stopper ring, which is used to increase the tightness when it is installed.

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