Air inlet filter for pneumatic pick

Abstract

The utility model relates to the technical field of filters, in particular to an air inlet filter for an air pick, which comprises a mounting sleeve, a filtering mechanism is arranged in the mounting sleeve, and a connecting mechanism is arranged on the outer wall of the mounting sleeve and close to the filtering mechanism. The filter mechanism comprises connecting rods which are slidably connected to the top, the bottom and the two sides of the inner wall of the mounting sleeve, and the filter mechanism is arranged in the mounting sleeve, so that the filter screen can be taken out from the mounting sleeve by utilizing the connecting rods and limiting blocks in the filter mechanism through a positioning structure; therefore, in the use process of the mounting sleeve, the filter screen is taken out more conveniently and quickly, the device is more convenient to use, and the problems that a filter screen is arranged at an air inlet of an existing air pick to prevent impurities in compressed air from entering the air pick, and the filter screen is fixedly mounted in the air inlet and is inconvenient to disassemble and clean are solved.

Description

Technical Field

[0001] The utility model relates to the technical field of filters, in particular to an air inlet filter for a pneumatic pick. Background Technique

[0002] A pneumatic pick is a device that uses compressed air to repeatedly strike a pick head to excavate hard ground. For example, a pneumatic pick provided in Application No. 202121999101.6 includes a pick handle, a pick cylinder, and a pick shank. The pick handle is provided with a recessed accommodation cavity. One end of the pick cylinder is arranged in the accommodation cavity. A connection sleeve is arranged between the pick handle and the pick cylinder. A pick handle spring is arranged between the pick handle and the connection sleeve. The end of the connection sleeve is provided with a vertically installed air inlet device and a valve device for switching on and off the air inlet. The pick cylinder is hollow and the end away from the pick handle is provided with a head spring. The pick shank is inserted on the pick cylinder. The head spring is arranged outside the pick shank. The side wall of the pick cylinder is provided with a first exhaust hole. A wind shield is arranged outside the first exhaust hole. The outer wall of the pick cylinder is provided with a groove. The wind shield is arranged in the groove and both ends are in contact with the side walls of the groove. The wind shield is provided with a second exhaust hole. It has the advantages of simple structure, high environmental adaptability, good protection effect, high safety, and low working noise. However, the existing pneumatic pick still has deficiencies. Specifically, a filter screen is arranged at the air inlet of the existing pneumatic pick to prevent debris in the compressed air from entering the interior. The filter screen is fixedly installed in the air inlet, and it is relatively inconvenient to disassemble and clean.

[0003] Therefore, an air inlet filter for a pneumatic pick is needed to solve the problems raised in the above background technique. Summary of the Utility Model

[0004] The purpose of the utility model is to provide an air inlet filter for a pneumatic pick to solve the problems raised in the above background technique.

[0005] To achieve the above purpose, the utility model provides the following technical solutions:

[0006] An air inlet filter for a pneumatic pick includes an installation sleeve. A filtering mechanism is arranged inside the installation sleeve. A connection mechanism is arranged on the outer wall of the installation sleeve and at a position close to the filtering mechanism.

[0007] The filtering mechanism includes connecting rods slidably connected to the top, bottom, and both sides of the inner wall of the mounting sleeve. A filter screen is fixedly connected to the outer wall of the connecting rod on the side away from the mounting sleeve. A sealing gasket is fixedly connected to the outer wall of the filter screen near the filter screen. A limiting plate is fixedly connected to the outer wall of the connecting rod on the side away from the filter screen. A positioning pin is slidably connected to the inside of the limiting plate on the front and back sides away from the filter screen. A sliding block is fixedly connected to the outer wall of the positioning pin inside the mounting sleeve. A sliding groove is formed in the inner part of the mounting sleeve at the corresponding position of the sliding block. A return spring is fixedly connected to the outer wall of the sliding block in the sliding groove. A diversion pipe is fixedly connected to the inner wall of the sliding groove at the position away from the sliding block. A one-way valve is fixedly connected to the inside of the diversion pipe. A sealing screw is threadedly connected to the inner wall of the sliding groove near the diversion pipe.

[0008] As a preferred solution of the present invention, the connecting mechanism includes a connecting sleeve fixedly connected to the outer wall of the mounting sleeve. A sealing ring is fixedly connected to the inner wall of the connecting sleeve. A pressing block is slidably connected to the inside of the connecting sleeve near the sealing ring. A pressing spring is fixedly connected to the outer wall of the pressing block inside the connecting sleeve. A pressing ring is slidably connected to the outer wall of the connecting sleeve at the corresponding position of the pressing block. A push rod is fixedly connected to the outer wall of the pressing ring on the side away from the mounting sleeve. An internally threaded sleeve is rotatably connected to the outer wall of the push rod at the position away from the pressing ring.

[0009] As a preferred solution of the present invention, the mounting sleeves are all made of aluminum alloy. Two sets of the connecting mechanism and the filtering mechanism are provided, and the two sets of connecting mechanisms are respectively installed at both ends of the mounting sleeve.

[0010] As a preferred solution of the present invention, the connecting rods, sliding blocks, and positioning pins are all made of aluminum alloy. Four sets of the connecting rods, limiting plates, and sealing gaskets are provided. The limiting plates penetrate and extend into and out of the mounting sleeve. The shape of the filter screen is adapted to the shape of the mounting sleeve.

[0011] As a preferred solution of the present invention, the connection methods of the limiting plates, positioning pins, and sliding blocks with the mounting sleeve are all sliding connections. The sealing gasket is made of silica gel. Multiple sets of the positioning pins, sliding blocks, return springs, and diversion pipes are provided.

[0012] As a preferred solution of the present invention, the connection method of the return spring with the mounting sleeve is a fixed connection. The sealing screw penetrates and extends out of the mounting sleeve. The one-way valve only allows air to flow into the sliding groove.

[0013] As a preferred embodiment of the present utility model, the connecting sleeve, the pressing block, and the pressing ring are all made of aluminum alloy. The connecting sleeve and the pressing ring are both designed with a conical structure. The pressing block is designed with a cross-shaped structure. The pressing block penetrates and extends outside the connecting sleeve. The diameter of the connecting sleeve is adapted to the diameter of the air pick air inlet pipe.

[0014] As a preferred embodiment of the present utility model, the connecting method of the pressing spring and the connecting sleeve is a fixed connection. The sealing ring is made of silica gel. There are two groups of sealing rings. The connecting method of the internal thread sleeve and the connecting sleeve is a threaded connection. There are multiple groups of push rods and pressing blocks. The connecting method of the pressing block and the pressing ring is a sliding connection.

[0015] Compared with the prior art, the beneficial effects of the present utility model are as follows:

[0016] 1. In the present utility model, by providing a filtering mechanism in the installation sleeve, the design that the filter screen can be taken out of the installation sleeve by using the connecting rod and the limiting block in the filtering mechanism through the positioning structure, so that during the use of the installation sleeve, the filter screen can be taken out more conveniently and quickly, making the device more convenient to use, and solving the problem that the existing air pick is provided with a filter screen at the air inlet to prevent sundries in the compressed air from entering the interior, and the filter screen is fixedly installed in the air inlet, making disassembly and cleaning inconvenient.

[0017] 2. In the present utility model, by providing a connecting mechanism in the installation sleeve, the design that the connecting sleeve can be quickly installed on the air pick air inlet by using the pressing block and the pressing ring in the connecting mechanism through the pushing structure, so that during the use of the installation sleeve, the installation sleeve can be installed and disassembled on the air pick more quickly, and the operation is relatively simple, solving the problem that the installation operation of the existing air pick filtering device is relatively cumbersome. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 is a three-dimensional structure diagram of the present utility model;

[0019] Figure 2 is a side sectional view of the present utility model;

[0020] Figure 3 is the present utility model Figure 2 enlarged view of part A in;

[0021] Figure 4 is a partial side sectional view of the filter screen of the present utility model;

[0022] Figure 5 is the present utility model Figure 4 enlarged view of part B in.

[0023] In the figure: 1. Installation sleeve; 2. Filter mechanism; 3. Connection mechanism; 201. Connecting rod; 202. Filter net; 203. Sealing gasket; 204. Limiting plate; 205. Positioning pin; 206. Sliding block; 207. Sliding groove; 208. Return spring; 209. Diversion pipe; 210. Check valve; 211. Sealing screw; 301. Connection sleeve; 302. Sealing ring; 303. Compression block; 304. Compression spring; 305. Compression ring; 306. Push rod; 307. Internal thread sleeve. Detailed implementation manners

[0024] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0025] For the embodiments, please refer to Figures 1-5 , the present invention provides a technical solution:

[0026] An air inlet filter for a pneumatic pick, including an installation sleeve 1, a filter mechanism 2 is arranged inside the installation sleeve 1, and a connection mechanism 3 is arranged on the outer wall of the installation sleeve 1 and near the filter mechanism 2;

[0027] Among them, the installation sleeve 1 is made of aluminum alloy, and two groups of connection mechanisms 3 and filter mechanisms 2 are provided, and the two groups of connection mechanisms 3 are respectively installed at both ends of the installation sleeve 1;

[0028] In this embodiment, refer to Figure 4 and Figure 5, the filtering mechanism 2 includes connecting rods 201 slidably connected to the top, bottom, and both sides of the inner wall of the mounting sleeve 1. A filter screen 202 is fixedly connected to the outer wall of the connecting rod 201 on the side away from the mounting sleeve 1. A sealing gasket 203 is fixedly connected to the outer wall of the filter screen 202 near the filter screen 202. A limiting plate 204 is fixedly connected to the outer wall of the connecting rod 201 on the side away from the filter screen 202. Positioning pins 205 are slidably connected to the front and back of the inner part of the limiting plate 204 on the side away from the filter screen 202. A sliding block 206 is fixedly connected to the outer wall of the positioning pin 205 inside the mounting sleeve 1. A sliding groove 207 is formed at the corresponding position of the sliding block 206 inside the mounting sleeve 1. A return spring 208 is fixedly connected to the outer wall of the sliding block 206 in the sliding groove 207. A diversion pipe 209 is fixedly connected to the inner wall of the sliding groove 207 at the position away from the sliding block 206. A one-way valve 210 is fixedly connected to the inside of the diversion pipe 209. A sealing screw 211 is threadedly connected to the inner wall of the sliding groove 207 near the diversion pipe 209;

[0029] Among them, the connecting rod 201, the sliding block 206, and the positioning pin 205 are all made of aluminum alloy. There are four groups each of the connecting rod 201, the limiting plate 204, and the sealing gasket 203. The limiting plate 204 penetrates and extends outside the mounting sleeve 1. The shape of the filter net 202 is adapted to the shape of the mounting sleeve 1. The connection methods of the limiting plate 204, the positioning pin 205, and the sliding block 206 with the mounting sleeve 1 are all sliding connections. The sealing gasket 203 is made of silica gel. There are multiple groups each of the positioning pin 205, the sliding block 206, the return spring 208, and the diversion pipe 209. The connection method of the return spring 208 with the mounting sleeve 1 is fixed connection. The sealing screw 211 penetrates and extends outside the mounting sleeve 1. The one-way valve 210 only allows air to flow into the sliding groove 207. The air pump sends compressed air into the mounting sleeve 1 through the air inlet pipe. The compressed air flows along the mounting sleeve 1. The flowing air will pass through the filter net 202, and the sundries in the air will be intercepted by the filter net 202. The air with the sundries removed flows into the air pick air inlet and enters the air pick. Unscrew the sealing screw 211. The sealing screw 211 no longer blocks the sliding groove 207. The high-pressure air in the sliding groove 207 flows out. The return spring 208 will pull the sliding block 206 to move in the reverse direction. The sliding block 206 moving in the reverse direction drives the positioning pin 205 to withdraw from the limiting plate 204. The positioning pin 205 no longer catches the limiting plate 204. Pull the connecting rod 201. The connecting rod 201 drives the filter net 202 to separate from the mounting sleeve 1. After cleaning the filter net 202, reinsert the filter net 202 and the connecting rod 201 into the mounting sleeve 1. Inject high-pressure air into the mounting sleeve 1. The high-pressure air flows into the sliding groove 207 through the diversion pipe 209. The high-pressure air flowing into the sliding groove 207 will push the sliding block 206 to move towards the limiting plate 204. The sliding block 206 will push the positioning pin 205 to insert into the limiting plate 204. The positioning pin 205 catches the limiting plate 204 and the connecting rod 201, thereby fixing the filter net 202 inside the mounting sleeve 1;

[0030] In this embodiment, referring to Figure 2 and Figure 3 , the connecting mechanism 3 includes a connecting sleeve 301 fixedly connected to the outer wall of the mounting sleeve 1. An inner wall of the connecting sleeve 301 is fixedly connected with a sealing ring 302. A pressing block 303 is slidably connected inside the connecting sleeve 301 and near the sealing ring 302. A pressing spring 304 is fixedly connected to an outer wall of the pressing block 303 inside the connecting sleeve 301. A pressing ring 305 is slidably connected to an outer wall of the connecting sleeve 301 at a position corresponding to the pressing block 303. A push rod 306 is fixedly connected to an outer wall of the pressing ring 305 on a side far from the mounting sleeve 1. An internally threaded sleeve 307 is rotatably connected to an outer wall of the push rod 306 at a position far from the pressing ring 305;

[0031] Among them, the connecting sleeve 301, the pressing block 303, and the pressing ring 305 are all made of aluminum alloy. The connecting sleeve 301 and the pressing ring 305 are both designed with a conical structure. The pressing block 303 is designed with a cross-shaped structure. The pressing block 303 penetrates and extends outside the connecting sleeve 301. The diameter of the connecting sleeve 301 is adapted to the diameter of the air pick air inlet pipe. The connection method of the pressing spring 304 and the connecting sleeve 301 is a fixed connection. The sealing ring 302 is made of silica gel. There are two groups of sealing rings 302. The connection method of the internal thread sleeve 307 and the connecting sleeve 301 is a threaded connection. There are multiple groups of push rods 306 and pressing blocks 303. The connection method of the pressing block 303 and the pressing ring 305 is a sliding connection;

[0032] Put the connecting sleeve 301 on the right side of the installation sleeve 1 on the air pick air inlet. Rotate the internal thread sleeve 307 on the right side. The rotating internal thread sleeve 307 drives the pressing ring 305 to move through the push rod 306. The moving pressing ring 305 squeezes the pressing block 303. After being squeezed, the pressing block 303 moves inward. The inward-moving pressing block 303 will clamp the air pick air inlet, fixing the installation sleeve 1 on the air pick air inlet. Then insert the air inlet pipe of the air pump into the connecting sleeve 301 on the left side of the installation sleeve 1. Rotate the internal thread sleeve 307 on the left side. The rotating internal thread sleeve 307 drives the pressing ring 305 to move through the push rod 306. The moving pressing ring 305 squeezes the pressing block 303. After being squeezed, the pressing block 303 moves inward. The inward-moving pressing block 303 will clamp the air inlet pipe, connecting the air inlet pipe with the installation sleeve 1. When there is too much debris attached to the filter net 202, rotate the internal thread sleeve 307 on the right side in the reverse direction. The reversely rotating internal thread sleeve 307 drives the pressing ring 305 to move in the reverse direction through the push rod 306. The reversely moving pressing ring 305 no longer squeezes the pressing block 303. The pressing spring 304 will pull the pressing block 303 to move outward. The outward-moving pressing block 303 no longer clamps the air pick air inlet. Pull the installation sleeve 1, and the installation sleeve 1 drives the connecting sleeve 301 on the right side to disengage from the air pick air inlet.

[0033] The working process of the utility model: When the air inlet filter for the air pick designed by this solution is in operation, high-pressure air is injected into the installation sleeve 1. The high-pressure air flows into the sliding groove 207 through the diversion pipe 209. The high-pressure air flowing into the sliding groove 207 will push the sliding block 206 to move towards the limiting plate 204. The sliding block 206 will push the positioning pin 205 to insert into the limiting plate 204. The positioning pin 205 locks the limiting plate 204 and the connecting rod 201, thereby fixing the filter net 202 in the installation sleeve 1;

[0034] The right side connecting sleeve 301 of the installation sleeve 1 is put on the air inlet of the pneumatic pick, and the internal threaded sleeve 307 on the right side is rotated. The rotating internal threaded sleeve 307 drives the clamping ring 305 to move through the pushing rod 306, and the moving clamping ring 305 squeezes the clamping block 303. The clamping block 303 moves inward after being squeezed, and the inward moving clamping block 303 clamps the air inlet of the pneumatic pick, and the installation sleeve 1 is fixed on the air inlet of the pneumatic pick, and then the air inlet pipe of the air pump is inserted into the connecting sleeve 301 on the left side of the installation sleeve 1, and the internal threaded sleeve 307 on the left side is rotated. The rotating internal threaded sleeve 307 drives the clamping ring 305 to move through the pushing rod 306, and the moving clamping ring 305 squeezes the clamping block 303. The clamping block 303 moves inward after being squeezed, and the inward moving clamping block 303 clamps the air inlet pipe, connecting the air inlet pipe with the installation sleeve 1 together;

[0035] The air pump is started, and the air pump sends compressed air into the installation sleeve 1 through the air inlet pipe. The compressed air flows along the installation sleeve 1, and the flowing air passes through the filter 202. The impurities in the air are blocked by the filter 202. The air without impurities flows into the air inlet of the pneumatic pick and enters the pneumatic pick;

[0036] When there are too many debris attached to the filter screen 202, the internal threaded sleeve 307 on the right side is rotated in the opposite direction. The internal threaded sleeve 307 rotating in the opposite direction drives the clamping ring 305 to move in the opposite direction through the push rod 306. The clamping ring 305 moving in the opposite direction no longer squeezes the clamping block 303. The clamping spring 304 pulls the clamping block 303 to move outward. The clamping block 303 moving outward no longer clamps the air inlet of the pneumatic pick, and the installation sleeve 1 is pulled. The installation sleeve 1 drives the connecting sleeve 301 on the right side to separate from the air inlet of the pneumatic pick.

[0037] The sealing screw 211 is unscrewed, and the sealing screw 211 no longer blocks the sliding groove 207. The high-pressure air in the sliding groove 207 flows out, and the return spring 208 pulls the sliding block 206 to move in the opposite direction. The sliding block 206 moving in the opposite direction drives the positioning pin 205 to withdraw from the limit plate 204, and the positioning pin 205 no longer blocks the limit plate 204. The connecting rod 201 is pulled, and the connecting rod 201 drives the filter screen 202 to separate from the installation sleeve 1. After the filter screen 202 is cleaned, the filter screen 202 is removed. 202 and the connecting rod 201 are reinserted into the installation sleeve 1, and high-pressure air is injected into the installation sleeve 1. The high-pressure air flows into the sliding groove 207 through the guide tube 209. The high-pressure air flowing into the sliding groove 207 will push the sliding block 206 to move toward the limit plate 204. The sliding block 206 will push the positioning pin 205 to insert into the limit plate 204. The positioning pin 205 clamps the limit plate 204 and the connecting rod 201, thereby fixing the filter screen 202 in the installation sleeve 1.

[0038] Although embodiments of the present utility model have been shown and described, those of ordinary skill in the art can understand that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principle and spirit of the present utility model. The scope of the present utility model is defined by the appended claims and their equivalents.

Claims

1. An air inlet filter for a pneumatic pick, comprising a mounting sleeve (1), characterized in that: A filtering mechanism (2) is arranged inside the installation sleeve (1), and a connecting mechanism (3) is arranged on the outer wall of the installation sleeve (1) near the filtering mechanism (2); The filtering mechanism (2) comprises a connecting rod (201) slidably connected to the top, bottom and both sides of the inner wall of the installation sleeve (1); a filter screen (202) is fixedly connected to the outer wall of the connecting rod (201) and on the side away from the installation sleeve (1); a sealing gasket (203) is fixedly connected to the outer wall of the filter screen (202) and at a position close to the filter screen (202); a limiting plate (204) is fixedly connected to the outer wall of the connecting rod (201) and on the side away from the filter screen (202); a positioning pin (205) is slidably connected to the interior of the limiting plate (204) and on the front and back sides away from the filter screen (202); the positioning pin (205) is fixedly connected to the outer wall of the connecting rod (201) and on the side away from the filter screen (202); 05) and is fixedly connected to a sliding block (206) on the outer wall of the mounting sleeve (1); a sliding groove (207) is provided inside the mounting sleeve (1) and at a position corresponding to the sliding block (206); a return spring (208) is fixedly connected to the outer wall of the sliding block (206) and in the sliding groove (207); a guide tube (209) is fixedly connected to the inner wall of the sliding groove (207) at a position away from the sliding block (206); a one-way valve (210) is fixedly connected to the inside of the guide tube (209); and a sealing screw (211) is threadedly connected to the inner wall of the sliding groove (207) and at a position close to the guide tube (209).

2. The air inlet filter for a pneumatic pick according to claim 1, characterized in that: The connecting mechanism (3) comprises a connecting sleeve (301) fixedly connected to the outer wall of the mounting sleeve (1); a sealing ring (302) is fixedly connected to the inner wall of the connecting sleeve (301); a pressing block (303) is slidably connected inside the connecting sleeve (301) and at a position close to the sealing ring (302); a pressing spring (304) is fixedly connected to the outer wall of the pressing block (303) and inside the connecting sleeve (301); a pressing ring (305) is slidably connected to the outer wall of the connecting sleeve (301) and at a corresponding position of the pressing block (303); a pushing rod (306) is fixedly connected to the outer wall of the pressing ring (305) at a side away from the mounting sleeve (1); and an internally threaded sleeve (307) is rotatably connected to the outer wall of the pushing rod (306) and at a position away from the pressing ring (305).

3. The air inlet filter for a pneumatic pick according to claim 1, characterized in that: The installation sleeve (1) is made of aluminum alloy, and the connection mechanism (3) and the filtering mechanism (2) are each provided in two groups, and the two groups of connection mechanisms (3) are respectively installed at two ends of the installation sleeve (1).

4. The air inlet filter for a pneumatic pick according to claim 1, characterized in that: The connecting rod (201), the sliding block (206) and the positioning pin (205) are all made of aluminum alloy. The connecting rod (201), the limiting plate (204) and the sealing gasket (203) are all provided in four groups. The limiting plate (204) penetrates and extends to the outside of the installation sleeve (1). The shape of the filter screen (202) is compatible with the shape of the installation sleeve (1).

5. The air inlet filter for a pneumatic pick according to claim 1, characterized in that: The connection mode between the limit plate (204), the positioning pin (205), the sliding block (206) and the installation sleeve (1) is sliding connection, the sealing gasket (203) is made of silicone, and the positioning pin (205), the sliding block (206), the return spring (208) and the guide tube (209) are all provided in multiple groups.

6. The air inlet filter for a pneumatic pick according to claim 1, characterized in that: The return spring (208) is connected to the mounting sleeve (1) in a fixed manner, the sealing screw (211) penetrates and extends outside the mounting sleeve (1), and the one-way valve (210) only allows air to flow into the sliding groove (207).

7. The air inlet filter for a pneumatic pick according to claim 2, characterized in that: The connecting sleeve (301), the clamping block (303) and the clamping ring (305) are all made of aluminum alloy. The connecting sleeve (301) and the clamping ring (305) are both designed with a conical structure. The clamping block (303) is designed with a cross structure. The clamping block (303) penetrates and extends outside the connecting sleeve (301). The diameter of the connecting sleeve (301) is compatible with the diameter of the air inlet pipe of the pneumatic pick.

8. The air inlet filter for a pneumatic pick according to claim 2, characterized in that: The connection mode between the compression spring (304) and the connecting sleeve (301) is a fixed connection. The sealing ring (302) is made of silicone. Two groups of sealing rings (302) are provided. The connection mode between the internal threaded sleeve (307) and the connecting sleeve (301) is a threaded connection. The pushing rod (306) and the compression block (303) are both provided with multiple groups. The connection mode between the compression block (303) and the compression ring (305) is a sliding connection.

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