CN112077202A

CN112077202A - Automatic punching device for hardware

Info

Publication number: CN112077202A
Application number: CN202010829216.4A
Authority: CN
Inventors: 王伟
Original assignee: Individual
Current assignee: Individual
Priority date: 2020-08-18
Filing date: 2020-08-18
Publication date: 2020-12-15

Abstract

The invention relates to a punching device, in particular to an automatic hardware punching device. The technical problem to be solved is as follows: the automatic hardware punching device is simple in structure, labor-saving, capable of improving production efficiency, saving space and reducing production cost. The technical scheme is as follows: an automatic hardware punching device comprises a bracket, a baffle I, a support plate I, a fixing plate I, a support block I, a blanking barrel and the like; the first baffle plate is fixed on one side of the support, the first support plate is fixed on one side of the support, two sides of the fixed plate are fixedly connected to the first baffle plate and the first support plate respectively, and one end of the first support block is fixed on the support. The invention adds the reciprocating mechanism, the movement of the reciprocating mechanism in one circle can finish the process of automatically feeding the parts one by one, the manual feeding is replaced, the manpower is greatly saved, and the continuous movement of the reciprocating movement is realized.

Description

Automatic punching device for hardware

Technical Field

The invention relates to a punching device, in particular to an automatic hardware punching device.

Background

In the field of hardware processing technology, the punching process of hardware is one of important processes, and the matching of various parts is connected through holes.

In traditional production technology, by the manual work with the part of needs punching press send into stamping device in, punch a hole at starting drive, punch a hole and accomplish the back, stop device's operation is taken out the goods by the manual work again, in the time of extravagant manpower, the extravagant time of ten minutes, perhaps send the part into and send out the part by the conveyer belt, it is convenient many to compare the manual work, but has increaseed the cost of production, the joining of conveyer belt has also taken the space of production.

Therefore, the automatic hardware punching device which is simple in structure, labor-saving, capable of improving production efficiency, space-saving and capable of reducing production cost is urgently needed.

Disclosure of Invention

In order to overcome the defects of wasting time, increasing the production cost and occupying the production space while wasting manpower, the technical problem to be solved is as follows: the automatic hardware punching device is simple in structure, labor-saving, capable of improving production efficiency, saving space and reducing production cost.

The technical scheme is as follows: the utility model provides an automatic punching device of hardware, which comprises a bracket, baffle one, backup pad one, fixed plate one, supporting shoe one, blanking section of thick bamboo, power unit, the mechanism of punching a hole, reciprocating mechanism and ejecting mechanism, baffle one is fixed in one side of support, backup pad one is fixed in one side of support, the both sides of fixed plate rigid coupling is respectively on baffle one and backup pad one, the one end of supporting shoe one is fixed on the support, the other end of supporting shoe one is fixed on fixed plate one, blanking section of thick bamboo rigid coupling is close to one side of backup pad one on fixed plate one, power unit installs the one side of keeping away from backup pad one at the support, install on fixed plate one, reciprocating mechanism sliding connection is on power unit, ejecting mechanism installs the one side that.

As a preferred technical scheme, the power mechanism comprises a motor, a cam, a sliding column, a first support rod, an L-shaped plate, a first gear rack, a first shaft rod, a straight gear, a second gear rack and a second fixing plate, wherein the second fixing plate is fixed on one side, far away from the first support plate, of a support, the motor is fixed on the second fixing plate, the cam is installed on an output shaft of the motor, one end of the sliding column is connected with the cam in a sliding mode, the other end of the sliding column is hinged with the first support rod, the first support rod is connected to the first support block in a sliding mode, one side of the first support rod is fixedly connected with the L-shaped plate, the other end of the L-shaped plate is fixedly connected with the first gear rack, the first shaft rod is connected with a straight gear in a rotating mode, the first shaft rod is fixedly connected to one side of a baffle, one side of the straight gear is.

As a preferred technical scheme of the invention, the punching mechanism comprises a first baffle ring, a second support plate, a third fixed plate, a fourth fixed plate, a second support rod, a first fixed block, a second fixed block, a first punch head, a second punch head, a first spring, a second spring, a first connecting rod and a second connecting rod, wherein the fourth fixed plate is fixedly connected to a first gear strip, one end of the second support plate is fixed to one side of the fourth fixed plate, the other end of the second support plate is fixedly connected to the first support rod, the second fixed block is fixedly connected to the fourth fixed plate, the second punch head is installed on one side of the second fixed block, the other end of the second punch head penetrates through the second baffle ring, the second support rod is fixedly connected to the second gear strip, the other end of the second support rod is fixedly connected to the third fixed plate, the first fixed block is fixedly connected to one side of the third fixed plate, the first punch head is fixedly connected to one side, the first connecting rod is connected in the third fixing plate in a sliding mode, the first connecting rod is fixedly connected with the first baffle ring, the first spring is sleeved on the first connecting rod, one end of the spring is in contact with the third fixing plate, the other end of the spring is in contact with the first baffle ring, the second connecting rod is connected in the fourth fixing plate in a sliding mode, the second connecting rod is fixedly connected with the second baffle ring, the second spring is sleeved on the second connecting rod, one end of the spring is in contact with the fourth fixing plate, and the.

As a preferred technical scheme, the reciprocating mechanism comprises a connecting plate, a second baffle plate, a third baffle plate, a sliding rod, a third fixing block and a U-shaped plate, the connecting plate is fixedly connected to one side, far away from the sliding column, of the first support rod, the second baffle plate is fixedly connected to one side, far away from the first baffle plate, of the connecting plate, the third baffle plate is fixedly connected to one side, far away from the second baffle plate, of the connecting plate, one end of the sliding rod is fixedly connected to the first support block, the other end of the sliding rod is fixedly connected with the U-shaped plate, the U-shaped plate is located between the third baffle plate and the blanking.

According to a preferred technical scheme, the pushing mechanism comprises a fixing plate five, a supporting rod three, a supporting rod four, a shaft lever four, a fixing block four, a shaft lever five, a fixing block five, a push rod, a push plate and a supporting block two, the fixing block four is fixedly connected to one side, far away from the supporting rod two, of the fixing plate three, the fixing block four is rotatably connected to the supporting rod four, the other end of the shaft lever four is hinged to the supporting rod four, the fixing block five is rotatably connected to the supporting rod four, the fixing block five is fixedly connected to the fixing plate four in the same direction with the fixing block four, one end of the shaft lever five is rotatably connected to the fixing block five, the other end of the shaft lever five is hinged to the supporting rod three, the supporting rod three is rotatably connected to the fixing plate five, one side, close to the retaining ring one and the retaining ring two, of the.

Has the advantages that: the reciprocating mechanism is added, the one-by-one automatic feeding process of the parts can be completed through the movement of the reciprocating mechanism in one circle, the manual feeding is replaced, the manpower is greatly saved, the batch feeding of the parts is completed through the uninterrupted movement of the reciprocating mechanism, the premise of realizing batch production is realized, and the production efficiency is improved.

The punching mechanism and the material pushing mechanism are assembled together, the connection relation among the parts is effectively utilized, the assembled structure is simpler and clearer compared with the traditional two structures, and the cost is saved.

Drawings

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

Fig. 2 is a first partial structural diagram of the present invention.

Fig. 3 is a second partial structural diagram of the present invention.

Fig. 4 is a third partial structural diagram of the present invention.

Fig. 5 is a schematic view of a fourth partial structure of the present invention.

Fig. 6 is a schematic diagram of a fifth partial structure according to the present invention.

Fig. 7 is a schematic diagram of a sixth partial structure of the present invention.

Fig. 8 is a schematic diagram of a seventh partial structure according to the present invention.

Labeled as: 1-bracket, 101-baffle I, 102-support plate I, 103-fixed plate I, 104-support block I, 2-motor, 201-cam, 202-sliding column, 203-support rod I, 204-L-shaped plate, 205-gear rack I, 206-shaft rod I, 207-spur gear, 208-gear rack II, 209-fixed plate II, 3-baffle ring I, 301-baffle ring II, 302-support plate II, 303-fixed plate III, 304-fixed plate IV, 305-support rod II, 306-fixed block I, 307-fixed block II, 308-punch head I, 309-punch head II, 3010-spring I, 3011-spring II, 3012-connecting rod I, 3013-connecting rod II, 4-blanking barrel, 401-connecting plate, 402-baffle II, 403-baffle three, 404-sliding rod, 405-fixed block three, 406-U-shaped plate, 5-fixed plate five, 501-supporting rod three, 502-supporting rod four, 503-shaft rod four, 504-fixed block four, 505-shaft rod five, 506-fixed block five, 507-push rod, 508-push plate and 509-supporting block two.

Detailed Description

The invention is described in detail below with reference to the drawings and specific examples, but the invention is not limited thereto.

Example 1

An automatic hardware punching device is shown in figures 1-8 and comprises a support 1, a baffle I101, a support plate I102, a fixing plate I103, a support block I104, a blanking barrel 4, a power mechanism, a punching mechanism, a reciprocating mechanism and a pushing mechanism, wherein the baffle I101 is fixed on the right side of the upper portion of the support 1, the support plate I102 is fixed on the rear side of the upper portion of the support 1, the right side of the fixing plate is fixedly connected to the baffle I101, the rear side of the fixing plate is fixedly connected to the support plate I102, the lower end of the support block I104 is fixed at the middle position of the upper portion of the support 1, the upper end of the support block I104 is fixed at the middle position of the lower portion of the fixing plate I103, the blanking barrel 4 is fixedly connected to the rear side, close to the support plate I102, the power mechanism is installed on the right front side of the, the push-out mechanism is arranged on the rear side of the bracket 1 close to the first support plate 102.

When the punching device works, parts needing to be punched are manually placed into the blanking barrel 4, the power mechanism drives the reciprocating mechanism to feed the parts into the punching mechanism one by one, meanwhile, the power mechanism drives the punching mechanism to punch the parts, and after the punching is finished, the power mechanism drives the punching mechanism to recover to the original position, the punching mechanism drives the connected material pushing mechanism to push the finished products out of the device, so that the whole punching process is finished.

Example 2

On the basis of embodiment 1, as shown in fig. 2, the power mechanism includes a motor 2, a cam 201, a sliding column 202, a first supporting rod 203, an L-shaped plate 204, a first gear rack 205, a first shaft rod 206, a straight gear 207, a second gear rack 208 and a second fixing plate 209, the second fixing plate 209 is fixed on the upper right front side of the bracket 1 far away from the first supporting plate 102, the motor 2 is fixed on the upper portion of the second fixing plate 209, the cam 201 is installed on the left output shaft of the motor 2, the right end of the sliding column 202 is slidably connected in a groove of the cam 201, the other left end of the sliding column 202 is hinged with the front end of the first supporting rod 203, the first supporting rod 203 is slidably connected at the middle position of the front side of the first supporting block 104, the first supporting rod 203 penetrates through the first supporting block 104, the lower front side of the first supporting rod 203 is fixedly connected with the L-shaped plate 204, the left end of the L-shaped plate 204 is fixedly connected, the right end of the first shaft rod 206 is fixedly connected to the left side of the first baffle plate 101, the upper side of the straight gear 207 is meshed with the first gear rack 205, the lower side of the straight gear 207 is meshed with the second gear rack 208, and the second gear rack 208 is connected to the support 1 in a sliding mode.

When the device works, the motor 2 is started, the cam 201 connected to the output shaft of the motor 2 starts to rotate to drive the sliding column 202 connected with the cam 201 in a sliding manner, the sliding column 201 slides in the groove in the cam 201, the first support rod 203 hinged with the sliding column 202 starts to slide back and forth in the first support block 104 along with the sliding of the sliding column 202, the reciprocating device arranged on the first support rod 203 is installed, meanwhile, the L-shaped plate 204 fixedly connected to the first support rod 203 also drives the first gear rack 205 to slide on the sliding rail of the support frame 1, the first gear rack 205 is meshed with the straight gear 207, so that the straight gear 207 rotates, the straight gear 207 is meshed with the second gear rack 208 to drive the second gear rack 208 to slide in the sliding rail on the first fixing plate 103, when the first gear rack 205 and the second gear rack 208 are in reverse tightening movement, the punching device punches a hole, the material pushing device moves outwards, when the first gear rack 205 and, and after the punching of the punching device is finished, the punching device starts to restore the original position, and the material pushing device starts to push materials.

Example 3

On the basis of embodiment 2, as shown in fig. 3-6, the punching mechanism includes a first retaining ring 3, a second retaining ring 301, a second supporting plate 302, a third fixing plate 303, a fourth fixing plate 304, a second supporting rod 305, a first fixing block 306, a second fixing block 307, a first punch 308, a second punch 309, a first spring 3010, a second spring 3011, a first connecting rod 3012 and a second connecting rod 3013, the fourth fixing plate 304 is fixedly connected to the right rear side of the first gear rack 205, the lower end of the second supporting plate 302 is fixedly connected to the right side of the upper portion of the fourth fixing plate 304, the upper end of the second supporting plate 302 is fixedly connected to the left rear side of the first supporting rod 203, the second fixing block 307 is fixedly connected to the upper rear side of the fourth fixing plate 304, the second punch 309 is mounted to the rear side of the second fixing block 307, the rear end of the second punch 309 penetrates through the second retaining ring 301, the upper end of the second supporting rod 305 is fixedly connected to the right rear side of the, the front side of the upper portion of the third fixing plate 303 close to the second retaining ring 301 is fixedly connected with a first fixing block 306, the first punch 308 is fixedly connected to one side of the first fixing block 306 close to the second retaining ring 301, the front end of the first punch 308 penetrates through the first retaining ring 3, the first retaining ring 3 is in contact with the second retaining ring 301, the rear end of the first connecting rod 3012 is slidably connected into the front portion of the third fixing plate 303, the front end of the first connecting rod 3012 is fixedly connected with the rear portion of the first retaining ring 3, the first spring 3010 is sleeved on the first connecting rod 3012, the rear end of the first spring 3010 is in contact with the third fixing plate 303, the front end of the first spring is in contact with the first retaining ring 3, the second connecting rod 3013 is slidably connected into the rear portion of the fourth fixing plate 304, the front end of the second connecting rod 3013 is fixedly connected with the rear end of the second retaining ring 301, the second spring.

When the first gear strip 205 and the second gear strip 208 are reversely tightened and moved, the fourth fixing plate 304 connected with the first gear strip 205 and the fifth fixing plate 5 connected with the second gear strip 208 start to be close to respectively drive the second punch 309 and the first punch 308 on the second fixing block 307 and the first fixing block 306 which are fixed with the fourth fixing plate to be close to each other, the second fixing plate 304 compresses the second spring 3011 when moving, the second connecting rod 3013 is pushed to drive the second retaining ring 301 to move, the first spring 3010 is pushed when moving the third fixing plate 303, the first connecting rod 3012 is pushed to drive the first retaining ring 3 to move, the second punch 309 and the first punch 308 clamp the part, the second punch 309 and the first punch 308 punch the part, after the punching is finished, the first gear strip 205 and the second gear strip 208 are reversely expanded and moved, the fourth fixing plate 304 and the fifth fixing plate 5 start to move back under the elastic force of the first spring 3010 and the second spring 3011, the protrusions in the fourth fixing plate 304 and the fifth fixing plate 5 move along the grooves in the second fixing, and moving the second fixing block 307, the first fixing block 306, the second punch 309 and the first punch 308 back to the original position, and waiting for the pushing device to push the part out and the next punching process.

Example 4

Based on embodiment 3, as shown in fig. 7, the reciprocating mechanism includes a connecting plate 401, a second baffle 402, a third baffle 403, a sliding rod 404, a third fixed block 405, and a U-shaped plate 406, the connecting plate 401 is fixedly connected to the rear side of the first support rod 203 away from the sliding column 202, the rear upper side of the left portion of the connecting plate 401 away from the first baffle 101 is fixedly connected to the second baffle 402, the front lower side of the left portion of the connecting plate 401 away from the second baffle 402 is fixedly connected to the third baffle 403, the front end of the sliding rod 404 is fixedly connected to the middle position of the rear portion of the first support block 104, the rear end of the sliding rod 404 is fixedly connected to the U-shaped plate 406, the U-shaped plate 406 is located between the third baffle 403 and the blanking cylinder 4, the third fixed block 405 is fixed to the middle position of the left portion.

When the motor 2 is started, the connecting plate 401 fixed on the first supporting rod 203 starts to reciprocate along with the movement of the first supporting rod 203, when a part needing punching falls from a blanking hole, the baffle plate three 403 fixed on the connecting plate 401 catches the part, when the first supporting rod 203 starts to move forwards, the baffle plate two 402 and the baffle plate three 403 are driven to move forwards, the part falls into a space formed by the baffle ring one 3 and the baffle ring two 301 through the U-shaped plate 406, the baffle plate two 402 fixed on the connecting plate 401 blocks a hole below the blanking hole to prevent the next part from falling, when the sliding column 202 drives the first supporting rod 203 to rotate on the cam 201 for one circle, the baffle plate two 402 leaves the hole below the blanking barrel, and meanwhile, the baffle plate three 403 moves to the position below the U-shaped plate 406 to catch the falling part, and the process of one circle of reciprocating is completed.

Example 5

Based on embodiment 4, as shown in fig. 8, the pushing-out mechanism includes a fixing plate five 5, a support rod three 501, a support rod four 502, a shaft rod four 503, a fixing block four 504, a shaft rod five 505, a fixing block five 506, a push rod 507, a push plate 508 and a support block two 509, the fixing block four 504 is fixedly connected to the rear side of the right portion of the fixing plate three 303 far from the support rod two 305, the upper portion of the fixing block four 504 is rotatably connected to the shaft rod four 503, the upper end of the shaft rod four 503 is hinged to the support rod four 502, the support rod four 502 is rotatably connected to the fixing plate five 5, the fixing block five 506 is fixedly connected to the fixing plate four 304 in the same side direction as the fixing block four 504, the lower end of the shaft rod five 505 is rotatably connected to the fixing block five 506, the upper end of the shaft rod five 505 is hinged to the support rod three 501, the support rod three 501 is rotatably connected to the fixing plate five 5, the, a second supporting block 509 is fixedly connected to the middle position of the upper rear side of the bracket 1, and the front side of the push rod 507 close to the push plate 508 is connected with the second supporting block 509 in a sliding mode.

When the third fixing plate 303 and the fourth fixing plate 304 move back to back, the fourth supporting rod 502 and the third supporting rod 501 which are hinged with the fourth fixing block 504 and the fifth fixing block 506 are driven to move, meanwhile, the fifth fixing plate 5 which is rotationally connected with the fourth supporting rod 502 and the third supporting rod 501 moves towards the direction of the part, the push rod 507 and the push plate 508 which slide on the second supporting block are driven to move, the part is pushed out of the device, when the third fixing plate 303 and the fourth fixing plate 304 move towards each other, the fifth fixing plate 5 which is rotationally connected with the fourth supporting rod 502 and the third supporting rod 501 moves away from the part, and the push rod 507 and the push plate 508 are driven to move away from the first punch 308 and the second. Preparing for the next push-out process.

Finally, it should be noted that the above embodiments are only used for illustrating the technical solutions of the present invention and not for limiting the protection scope of the present invention, and although the present invention is described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that modifications or equivalent substitutions can be made on the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention.

Claims

1. An automatic hardware punching device is characterized by comprising a support (1), a baffle I (101), a support plate I (102), a fixing plate I (103), a support block I (104), a blanking barrel (4), a power mechanism, a punching mechanism, a reciprocating mechanism and a pushing mechanism, wherein the baffle I (101) is fixed on one side of the support (1), the support plate I (102) is fixed on one side of the support (1), two sides of the fixing plate are fixedly connected to the baffle I (101) and the support plate I (102) respectively, one end of the support block I (104) is fixed on the support (1), the other end of the support block I (104) is fixed on the fixing plate I (103), the blanking barrel (4) is fixedly connected to one side, close to the support plate I (102), of the support plate I (103), the power mechanism is installed on one side, far away from the support plate I (102), of the support (1) and is installed on the fixing, the reciprocating mechanism is connected to the power mechanism in a sliding mode, and the pushing-out mechanism is installed on one side, close to the first support plate (102), of the support frame (1).

2. The automatic hardware punching device according to claim 1, wherein the power mechanism comprises a motor (2), a cam (201), a sliding column (202), a first support rod (203), an L-shaped plate (204), a first gear rack (205), a first shaft rod (206), a straight gear (207), a second gear rack (208) and a second fixing plate (209), the second fixing plate (209) is fixed on one side, far away from the first support plate (102), of the bracket (1), the motor (2) is fixed on the second fixing plate (209), the cam (201) is installed on an output shaft of the motor (2), one end of the sliding column (202) is slidably connected with the cam (201), the other end of the sliding column (202) is hinged with the first support rod (203), the first support rod (203) is slidably connected with the first support block (104), one side of the first support rod (203) is fixedly connected with the L-shaped plate (204), and the other end of the L-shaped plate (204) is fixedly connected with the first gear rack (, the first shaft rod (206) is rotatably connected with the first straight gear (207), the first shaft rod (206) is fixedly connected to one side of the first baffle plate (101), one side of the straight gear (207) is meshed with the first gear rack (205), the first gear rack (205) is slidably connected to the support (1), the other side of the straight gear (207) is meshed with the second gear rack (208), and the second gear rack (208) is slidably connected to the support (1).

3. The automatic hardware punching device according to claim 2, wherein the punching mechanism comprises a first blocking ring (3), a second blocking ring (301), a second supporting plate (302), a third fixing plate (303), a fourth fixing plate (304), a second supporting rod (305), a first fixing block (306), a second fixing block (307), a first punch (308), a second punch (309), a first spring (3010), a second spring (3011), a first connecting rod (3012) and a second connecting rod (3013), the fourth fixing plate (304) is fixedly connected to the first gear rack (205), one end of the second supporting plate (302) is fixed to one side of the fourth fixing plate (304), the other end of the second supporting plate (302) is fixedly connected to the first supporting rod (203), the second fixing block (307) is fixedly connected to the fourth fixing plate (304), the second punch (309) is mounted to one side of the second fixing block (307), and the other end of the second punch (309) penetrates through the second blocking ring (301), the second support rod (305) is fixedly connected to the second gear strip (208), the other end of the second support rod (305) is fixedly connected to the third fixing plate (303), one side, close to the second retaining ring (301), of the third fixing plate (303) is fixedly connected with the first fixing block (306), the first punch (308) is fixedly connected to one side, close to the second retaining ring (301), of the first fixing block (306), the other end of the first punch (308) penetrates through the first retaining ring (3), the first retaining ring (3) is in contact with the second retaining ring (301), the first connecting rod (3012) is slidably connected into the third fixing plate (303), the first connecting rod (3012) is fixedly connected with the first retaining ring (3), the first spring (3010) is sleeved on the first connecting rod (3012), the first spring (3010) is connected with the third fixing plate (303), the other end of the spring is in contact with the first retaining ring (3), the second connecting rod (3013) is slidably connected into the fourth fixing plate (304), the second connecting rod (3013) is fixedly connected with the second retaining ring (301), and the second spring (301, the end of the first spring (3010) contacts with the fourth fixing plate (304), and the other end of the spring contacts with the second retaining ring (301).

4. The automatic hardware punching device according to claim 3, characterized in that the reciprocating mechanism comprises a connecting plate (401), a second baffle plate (402) and a third baffle plate (403), the novel slide rod structure comprises a slide rod (404), a third fixed block (405) and a U-shaped plate (406), wherein a connecting plate (401) is fixedly connected to one side, far away from a slide column (202), of a first support rod (203), one side, far away from a first baffle (101), of the connecting plate (401) is fixedly connected with a second baffle (402), one side, far away from the second baffle (402), of the connecting plate (401) is fixedly connected with a third baffle (403), one end of the slide rod (404) is fixedly connected to a first support block (104), the other end of the slide rod (404) is fixedly connected with the U-shaped plate (406), the U-shaped plate (406) is located between the third baffle (403) and a charging barrel (4), the third fixed block (405) is fixed to the first support rod (203.

5. The automatic hardware punching device according to claim 4, wherein the pushing mechanism comprises a fixing plate five (5), a support rod three (501), a support rod four (502), a shaft rod four (503), a fixing block four (504), a shaft rod five (505), a fixing block five (506), a push rod (507), a push plate (508) and a support block two (509), the fixing block four (504) is fixedly connected to one side, far away from the support rod two (305), of the fixing plate three (303), the fixing block four (504) is rotatably connected, the other end of the shaft rod four (503) is hinged to the support rod four (502), the fixing block five (506) is rotatably connected with the support rod four (502), the fixing block five (506) is fixedly connected to the fixing plate four (304) in the same side direction as the fixing block four (504), one end of the fixing block five (505) is rotatably connected with the shaft rod five (506), the other end of the shaft rod five (505) is hinged, the third supporting rod (501) is rotatably connected with the fifth fixing plate (5), a push rod (507) is fixedly connected to one side, close to the first blocking ring (3) and the second blocking ring (301), of the fifth fixing block (506), the other end of the push rod (507) is fixedly connected with a push plate (508), the second supporting block (509) is fixedly connected to the support (1), and one side, close to the push plate (508), of the push rod (507) is slidably connected with the second supporting block (509).