CN220909591U

CN220909591U - Drilling equipment for road bridge construction

Info

Publication number: CN220909591U
Application number: CN202322827893.4U
Authority: CN
Inventors: 吕秋生; 薛乔木; 李文博; 汪志伟; 周云龙
Original assignee: Heilongjiang Suiqing Expressway Investment And Construction Co ltd
Current assignee: Heilongjiang Suiqing Expressway Investment And Construction Co ltd
Priority date: 2023-10-21
Filing date: 2023-10-21
Publication date: 2024-05-07
Anticipated expiration: 2033-10-21

Abstract

The utility model discloses drilling equipment for road bridge construction, which comprises a mounting case, wherein two groups of movable pulleys are fixedly arranged on the lower surface of the mounting case, a positioning assembly is movably arranged on the lower surface of the mounting case, a mounting frame is fixedly arranged on the upper surface of the mounting case, a lifting assembly is fixedly arranged on the upper surface of the mounting frame, a drilling assembly is rotatably arranged on the inner wall of the mounting case, the upper surface of the drilling assembly is rotatably connected with the lower surface of the lifting assembly, the positioning assembly is placed on the ground needing to be perforated, a handle is manually pushed, so that the mounting case moves through the movable pulleys, when the mounting case is pushed onto the positioning assembly, the positioning assembly is operated to fix the mounting case, when the mounting case is fixed, the lifting assembly is started to move, the drilling assembly is pushed to descend, the drilling assembly is started to rotate while the drilling assembly is lowered, and dust diffusion is reduced through a dust falling assembly, so that the effect of positioning and rotating holes is achieved.

Description

Drilling equipment for road bridge construction

Technical Field

The utility model belongs to the technical field of road bridge construction, and particularly relates to drilling equipment for road bridge construction.

Background

A drill refers to a machine and equipment that leaves a cylindrical hole or bore in a target by means of rotary cutting or rotary extrusion with a tool that is harder and sharper than the target. Also known as drills, punches, hole drills, hole-penetrating machines, etc. The expected effect is achieved by drilling the precision part, and the drilling machine comprises a semiautomatic drilling machine and a full-automatic drilling machine, so that the cost of manpower resources is increased; most enterprises consider fully automatic drilling machines as a direction of development. Along with the development of the times, the drilling technology of the automatic drilling machine is improved, and the advantage of drilling the drilling jewelry of the watchband of the various hardware die by adopting the full-automatic drilling machine is obvious.

The problems of the prior art are: the existing road and bridge drilling equipment generally does not have a positioning and punching function when in use, if the existing road and bridge drilling equipment cannot be used for positioning and punching, errors can occur in the punched holes, the construction of the whole engineering can be influenced by one error, a large amount of dust is easily generated when the drilling equipment is used for punching, and the dust can pollute the environment, so that the road and bridge drilling equipment for construction is provided.

Disclosure of utility model

The utility model aims to provide drilling equipment for road and bridge construction, which is used for solving the problems in the background technology.

The utility model discloses drilling equipment for road and bridge construction, which comprises a mounting machine case, wherein two groups of movable pulleys are fixedly arranged on the lower surface of the mounting machine case, a positioning assembly is movably arranged on the lower surface of the mounting machine case, a mounting machine frame is fixedly arranged on the upper surface of the mounting machine case, a lifting assembly is fixedly arranged on the upper surface of the mounting machine frame, a drilling assembly is rotatably arranged on the inner wall of the mounting machine case, the upper surface of the drilling assembly is rotatably connected with the lower surface of the lifting assembly, through holes are formed in the inner wall of the mounting machine case, and two groups of chute blocks are fixedly arranged on the lower surface of the mounting machine case.

As the preferable mode of the utility model, the dust fall component is fixedly arranged on the upper surface of the through hole, the warning reflective paste is fixedly arranged on both sides of the mounting frame, the handle is fixedly arranged at one end of the mounting machine box, the cabinet door is rotatably arranged at the other end of the mounting machine box through the first bearing, two groups of sliding blocks are fixedly arranged on one side of the cabinet door, and warning boards are jointly arranged on the outer surfaces of the two groups of sliding blocks.

As the preferable mode of the utility model, the lifting assembly comprises two groups of screw rods and a first motor, the first motor is fixedly arranged on one side of the installation frame, a first gear is fixedly arranged on an output shaft of the first motor, the two groups of screw rods are rotatably arranged on the inner wall of the installation frame through a second bearing, and one ends of the two groups of screw rods penetrate through the upper surface of the installation frame.

As the preferable mode of the utility model, one end of each of the two groups of screw rods is fixedly provided with a synchronous wheel, a synchronous belt is connected between the two groups of synchronous wheels in a transmission way, the upper surface of one group of synchronous wheels is fixedly provided with a second gear, the second gear and the first gear are meshed with each other for rotation, and the outer surfaces of the two groups of screw rods are connected with a first mounting plate in a common thread way.

As a preferred mode of the utility model, the drilling assembly comprises a rotary column and a second motor, wherein the second motor is fixedly arranged on the upper surface of the installation case, an output shaft of the second motor penetrates through the inner wall of the installation case, a third gear is fixedly arranged on the output shaft of the second motor, and the rotary column is rotatably arranged on the inner wall of the installation case through a third bearing.

As the preferable one of the utility model, one end of the rotating column is fixedly provided with a fourth gear, the fourth gear and the third gear are meshed with each other for rotation, the inner wall of the rotating column is slidably provided with a transmission rod, the lower surface of the transmission rod is fixedly provided with a second mounting plate, one end of the transmission rod is rotatably arranged on the lower surface of the first mounting plate through a fourth bearing, and the lower surface of the second mounting plate is fixedly provided with a drill bit.

As the preferable mode of the utility model, the dust settling component comprises a mounting ring and a conveying pipeline, wherein a plurality of groups of spray heads are fixedly arranged on the inner wall of the mounting ring, the conveying pipeline is fixedly arranged on the outer surface of the mounting ring, the conveying pipeline is connected with a plurality of groups of spray heads through the pipeline, one end of the conveying pipeline penetrates through the outer side of the mounting machine case, a valve is fixedly arranged at one end of the conveying pipeline, and a shielding cover is fixedly arranged on the upper surface of the mounting ring.

As the preferable one of the utility model, the positioning assembly comprises a positioning ring, two ends of the positioning ring are fixedly provided with placing strips, one ends of the two groups of placing strips are fixedly provided with a first baffle plate, the other ends of the two groups of placing strips are fixedly provided with slot blocks, the inner wall of each slot block is slidably provided with a second baffle plate, one ends of the two groups of placing strips are provided with slopes, and the upper surfaces of the two groups of placing strips are fixedly provided with guide rails.

Compared with the prior art, the utility model has the following beneficial effects:

1. According to the utility model, through the design of the installation chassis, the positioning assembly is placed on the ground needing to be perforated, and then the handle is manually pushed, so that the installation chassis moves through the movable pulleys, when the installation chassis is pushed onto the positioning assembly, the positioning assembly is operated to fix the installation chassis, when the installation chassis is fixed, the lifting assembly is started to operate, the lifting assembly pushes the drilling assembly to descend, and when the drilling assembly descends, the drilling assembly is started to operate and rotate, and then the dust diffusion is reduced through the dust falling assembly, so that the effect of rotating the holes is achieved.

2. According to the utility model, through the design of the screw rod and the first motor, the first motor is started to operate, the output shaft of the first motor rotates, the first motor output shaft drives the first gear to rotate, the first gear rotates to drive the second gear to rotate, the second gear rotates to drive one group of synchronous wheels to rotate, one group of synchronous wheels drives the other group of synchronous wheels to rotate through the synchronous belt, the two groups of synchronous wheels simultaneously rotate, the synchronous wheels drive the screw rod to rotate, the screw rod rotates to drive the first mounting plate to move, and the first mounting plate drives the transmission rod to descend, so that the effect of pushing the transmission rod to descend is achieved.

3. According to the utility model, through the design of the rotating column and the second motor, the first mounting plate pushes the transmission rod to descend, the transmission rod slides on the inner wall of the rotating column, the transmission rod pushes the second mounting plate to descend, the second mounting plate pushes the drill bit to descend to contact the ground, the second motor is started to operate in the descending process, the output shaft of the second motor rotates, the output shaft of the second motor drives the third gear to rotate, the third gear drives the fourth gear to rotate, the fourth gear drives the rotating column to rotate, the rotating column rotates to drive the transmission rod to rotate, the transmission rod drives the second mounting plate to rotate, and the second mounting plate drives the drill bit to rotate, so that the effect of rotating holes is achieved.

4. According to the utility model, through the design of the mounting ring and the conveying pipeline, when the drill bit rotates to drill holes, the valve is opened to inject water into the conveying pipeline, the conveying pipeline divides the water into a plurality of groups of spray heads through water pressure, the water is sprayed out through the spray heads, and the water can be effectively prevented from being sputtered through the shielding cover, so that the effects of dust fall and cooling are achieved.

5. According to the utility model, through the design of the locating ring, the placing strip is prevented from being placed on the ground during drilling, the locating ring is aligned with the position to be drilled, the mounting case is pushed to move by a handle, the chute block at the bottom of the mounting case is aligned with the guide rail, the mounting case is pushed up, the mounting case moves onto the guide rail through a slope, when one end of the mounting case touches the first baffle, the through hole is aligned with the locating ring, and the second baffle is inserted into the slot block to fix the mounting case, so that the effect of locating and drilling is achieved.

Drawings

FIG. 1 is a schematic view of the overall structure provided by an embodiment of the present utility model;

FIG. 2 is a schematic illustration of a drilling assembly provided in an embodiment of the present utility model;

FIG. 3 is a schematic view of a through-hole according to an embodiment of the present utility model;

FIG. 4 is a schematic view of a positioning assembly according to an embodiment of the present utility model;

Fig. 5 is a schematic view of a lifting assembly according to an embodiment of the present utility model.

In the figure: 1. installing a case; 2. a moving pulley; 3. a positioning assembly; 4. a frame is installed; 5. a lifting assembly; 6. a drilling assembly; 7. a through hole; 8. a chute block; 9. a dust fall assembly; 10. warning the reflective paste; 11. a handle; 12. a cabinet door; 13. a slide block; 14. a warning board; 501. a screw rod; 502. a first motor; 503. a first gear; 504. a synchronizing wheel; 505. a synchronous belt; 506. a second gear; 507. a first mounting plate; 601. rotating the column; 602. a second motor; 603. a third gear; 604. a fourth gear; 605. a transmission rod; 606. a second mounting plate; 607. a drill bit; 901. a mounting ring; 902. a spray head; 903. a delivery conduit; 904. a valve; 905. a shielding cover; 301. a positioning ring; 302. placing a strip; 303. a first baffle; 304. a socket block; 305. a second baffle; 306. a ramp; 307. and a guide rail.

Detailed Description

For a further understanding of the utility model, its features and advantages, reference is now made to the following examples, which are illustrated in the accompanying drawings.

The structure of the present utility model will be described in detail with reference to the accompanying drawings.

As shown in fig. 1 to 5, the drilling equipment for road and bridge construction provided by the embodiment of the utility model comprises a mounting case 1, wherein two groups of movable pulleys 2 are fixedly mounted on the lower surface of the mounting case 1, a positioning component 3 is movably mounted on the lower surface of the mounting case 1, a mounting frame 4 is fixedly mounted on the upper surface of the mounting case 1, a lifting component 5 is fixedly mounted on the upper surface of the mounting frame 4, a drilling component 6 is rotatably mounted on the inner wall of the mounting case 1, the upper surface of the drilling component 6 is rotatably connected with the lower surface of the lifting component 5, a through hole 7 is formed in the inner wall of the mounting case 1, two groups of chute blocks 8 are fixedly mounted on the lower surface of the mounting case 1, a dust fall component 9 is fixedly mounted on the upper surface of the through hole 7, warning reflective labels 10 are fixedly mounted on both sides of the mounting frame 4, a handle 11 is fixedly mounted on one end of the mounting case 1, a cabinet door 12 is rotatably mounted on the other end of the mounting case 1 through a first bearing, two groups of sliders 13 are fixedly mounted on one side of the cabinet door 12, and warning boards 14 are jointly mounted on the outer surfaces of the two groups of sliders 13.

The scheme is adopted: through the design of installation machine case 1, place the subaerial that needs which to punch with locating component 3, rethread manual push handle 11 for installation machine case 1 removes through removing pulley 2, when pushing installation machine case 1 to locating component 3 above, and operation locating component 3 fixed mounting machine case 1, when installation machine case 1 is fixed, start lifting component 5 operation, lifting component 5 promotes drilling subassembly 6 decline, and when drilling subassembly 6 descends again, start drilling subassembly 6 operation rotation, and rethread dust fall subassembly 9 reduces the dust diffusion, thereby reached the effect of changeing the hole.

Referring to fig. 5, the lifting assembly 5 includes two sets of screw rods 501 and a first motor 502, the first motor 502 is fixedly installed at one side of the installation frame 4, an output shaft of the first motor 502 is fixedly installed with a first gear 503, the two sets of screw rods 501 are rotatably installed at the inner wall of the installation frame 4 through a second bearing, one ends of the two sets of screw rods 501 penetrate through the upper surface of the installation frame 4, one ends of the two sets of screw rods 501 are fixedly installed with synchronous wheels 504, a synchronous belt 505 is connected between the two sets of synchronous wheels 504 in a transmission manner, a second gear 506 is fixedly installed on the upper surface of one set of synchronous wheels 504, the second gear 506 and the first gear 503 are mutually meshed and rotated, and the outer surfaces of the two sets of screw rods 501 are in common threaded connection with a first mounting plate 507.

The scheme is adopted: through the design of lead screw 501 and first motor 502, start first motor 502 operation, first motor 502 output shaft rotates, first motor 502 output shaft drives first gear 503 rotation, first gear 503 rotates and drives second gear 506 rotation, second gear 506 rotates and drives one of them group synchronizing wheel 504 rotation, one of them synchronizing wheel 504 passes through the hold-in range 505 and drives another group synchronizing wheel 504 rotation, two groups synchronizing wheel 504 simultaneously rotate, synchronizing wheel 504 drives the lead screw 501 rotation, the lead screw 501 rotation drives first mounting panel 507 and removes, first mounting panel 507 promotes transfer line 605 and descends, thereby reached the effect that promotes transfer line 605 and descend.

Referring to fig. 5, the drilling assembly 6 includes a rotation column 601 and a second motor 602, the second motor 602 is fixedly installed on the upper surface of the installation case 1, an output shaft of the second motor 602 penetrates through the inner wall of the installation case 1, a third gear 603 is fixedly installed on the output shaft of the second motor 602, the rotation column 601 is rotatably installed on the inner wall of the installation case 1 through a third bearing, a fourth gear 604 is fixedly installed at one end of the rotation column 601, the fourth gear 604 and the third gear 603 are meshed with each other to rotate, a transmission rod 605 is slidably installed on the inner wall of the rotation column 601, a second installation plate 606 is fixedly installed on the lower surface of the transmission rod 605, one end of the transmission rod 605 is rotatably installed on the lower surface of the first installation plate 507 through a fourth bearing, and a drill bit 607 is fixedly installed on the lower surface of the second installation plate 606.

The scheme is adopted: through the design of the rotation post 601 and the second motor 602, the first mounting plate 507 pushes the transmission rod 605 to descend, the transmission rod 605 slides on the inner wall of the rotation post 601, the transmission rod 605 pushes the second mounting plate 606 to descend, the second mounting plate 606 pushes the drill bit 607 to descend to contact the ground, the second motor 602 is started to operate in the descending process, the output shaft of the second motor 602 rotates, the output shaft of the second motor 602 drives the third gear 603 to rotate, the third gear 603 drives the fourth gear 604 to rotate, the fourth gear 604 drives the rotation post 601 to rotate, the rotation post 601 rotates to drive the transmission rod 605 to rotate, the transmission rod 605 drives the second mounting plate 606 to rotate, and the second mounting plate 606 drives the drill bit 607 to rotate, so that the effect of rotating holes is achieved.

Referring to fig. 5, the dust settling component 9 includes a mounting ring 901 and a conveying pipe 903, wherein a plurality of groups of spray heads 902 are fixedly mounted on the inner wall of the mounting ring 901, the conveying pipe 903 is fixedly mounted on the outer surface of the mounting ring 901, the conveying pipe 903 is connected with the plurality of groups of spray heads 902 through pipes, one end of the conveying pipe 903 penetrates through the outer side of the mounting case 1, a valve 904 is fixedly mounted at one end of the conveying pipe 903, and a shielding cover 905 is fixedly mounted on the upper surface of the mounting ring 901.

The scheme is adopted: through the design of collar 901 and transfer line 903, when drill bit 607 rotates the drilling, open valve 904 and annotate transfer line 903 with water, transfer line 903 is through water pressure with moisture to a plurality of groups shower nozzle 902, spouts through shower nozzle 902, can effectually prevent water splash through shielding cover 905 to dust fall and cooling's effect has been reached.

Referring to fig. 5, the positioning assembly 3 includes a positioning ring 301, two ends of the positioning ring 301 are fixedly provided with placing strips 302, one ends of the two sets of placing strips 302 are fixedly provided with a first baffle 303, the other ends of the two sets of placing strips 302 are fixedly provided with slot blocks 304, the inner walls of the slot blocks 304 are slidably provided with a second baffle 305, one ends of the two sets of placing strips 302 are provided with slopes 306, and the upper surfaces of the two sets of placing strips 302 are fixedly provided with guide rails 307.

The scheme is adopted: through the design of the locating ring 301, when drilling, the placing strip 302 is prevented from being placed on the ground, the locating ring 301 is aligned with the position to be drilled, the installation case 1 is pushed to move by the handle 11, the chute block 8 at the bottom of the installation case 1 is aligned with the guide rail 307, the installation case 1 is pushed up, the installation case 1 is moved to the guide rail 307 through the slope 306, when one end of the installation case 1 touches the first baffle 303, the through hole 7 is aligned with the locating ring 301, and the second baffle 305 is inserted into the slot block 304 to fix the installation case 1, so that the effect of locating and drilling is achieved.

The working principle of the utility model is as follows:

when drilling, the placing bar 302 is prevented from being placed on the ground, the positioning ring 301 is aligned to the position to be drilled, the mounting case 1 is pushed to move by the handle 11, the chute block 8 at the bottom of the mounting case 1 is aligned to the guide rail 307, the mounting case 1 is pushed up, the mounting case 1 is moved to the guide rail 307 by the slope 306, when one end of the mounting case 1 contacts the first baffle 303, the through hole 7 is aligned with the positioning ring 301, the second baffle 305 is inserted into the slot block 304 to fix the mounting case 1, the first motor 502 is started to operate, the output shaft of the first motor 502 rotates, the output shaft of the first motor 502 drives the first gear 503 to rotate, the first gear 503 rotates to drive the second gear 506 to rotate, the second gear 506 rotates to drive one group of synchronous wheels 504 to rotate, the other group of synchronous wheels 504 is driven to rotate by the synchronous belt 505, two groups of synchronous wheels 504 rotate simultaneously, the synchronous wheels 504 drive the screw rod 501 to rotate, the screw rod 501 rotates to drive the first mounting plate 507 to move, the first mounting plate 507 drives the transmission rod 605 to descend, the transmission rod 605 slides on the inner wall of the rotating column 601, the transmission rod 605 drives the second mounting plate 606 to descend, the second mounting plate 606 drives the drill bit 607 to descend to contact the ground, the second motor 602 is started to operate in the descending process, the output shaft of the second motor 602 rotates, the output shaft of the second motor 602 drives the third gear 603 to rotate, the third gear 603 drives the fourth gear 604 to rotate, the fourth gear 604 drives the rotating column 601 to rotate, the rotating column 601 rotates to drive the transmission rod 605 to rotate, the transmission rod 605 drives the second mounting plate 606 to rotate, the second mounting plate 606 drives the drill bit 607 to rotate, when the drill bit 607 rotates to drill, the valve 904 is opened to inject water into the conveying pipeline 903, the water is sprayed to the plurality of groups of spray heads 902 through the water pressure by the conveying pipeline 903, and the water can be effectively prevented from being splashed through the shielding cover 905, so that the effect of drilling holes is achieved.

To sum up: this drilling equipment is used in road bridge construction, through above-mentioned technical scheme, solved current road bridge drilling equipment when using, generally all do not possess the location function of punching, if can not fix a position and punch, the hole that can appear to finish appears beating appears the error, and an error will influence the construction of whole engineering to very produce a large amount of dust when punching easily, the dust can pollute the problem of environment.

It is noted that relational terms such as first and second, and the like are used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Moreover, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus.

Although embodiments of the present utility model have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made therein without departing from the principles and spirit of the utility model, the scope of which is defined in the appended claims and their equivalents.

Claims

1. Drilling equipment is used in road bridge construction, including installation machine case (1), its characterized in that: install quick-witted case (1) lower surface fixed mounting has two sets of movable pulleys (2), install quick-witted case (1) lower surface movable mounting has locating component (3), install quick-witted case (1) upper surface fixed mounting has installation frame (4), install fixed mounting on frame (4) has lifting unit (5), install quick-witted case (1) inner wall rotation and install drilling subassembly (6), drilling subassembly (6) upper surface rotation connects lifting unit (5) lower surface, install quick-witted case (1) inner wall and offer through-hole (7), install quick-witted case (1) lower surface fixed mounting has two sets of spout pieces (8).

2. A drilling apparatus for road and bridge construction as claimed in claim 1, wherein: the anti-dust device is characterized in that dust fall components (9) are fixedly arranged on the upper surface of the through hole (7), warning light reflection patches (10) are fixedly arranged on two sides of the installation frame (4), a handle (11) is fixedly arranged at one end of the installation case (1), a cabinet door (12) is rotatably arranged at the other end of the installation case (1) through a first bearing, two groups of sliding blocks (13) are fixedly arranged on one side of the cabinet door (12), and warning boards (14) are jointly arranged on the outer surfaces of the two groups of sliding blocks (13).

3. A drilling apparatus for road and bridge construction as claimed in claim 2, wherein: the lifting assembly (5) comprises two groups of screw rods (501) and a first motor (502), the first motor (502) is fixedly arranged on one side of the installation frame (4), a first gear (503) is fixedly arranged on an output shaft of the first motor (502), the two groups of screw rods (501) are rotatably arranged on the inner wall of the installation frame (4) through a second bearing, and one ends of the two groups of screw rods (501) penetrate through the upper surface of the installation frame (4).

4. A drilling apparatus for road and bridge construction as claimed in claim 3, wherein: two sets of lead screw (501) one end is all fixed mounting synchronizing wheel (504), and two sets of transmission is connected with hold-in range (505) between synchronizing wheel (504), and wherein a set of synchronizing wheel (504) upper surface fixed mounting has second gear (506), second gear (506) and first gear (503) intermeshing rotate, two sets of lead screw (501) surface common threaded connection has first mounting panel (507).

5. A drilling apparatus for road and bridge construction as claimed in claim 1, wherein: drilling subassembly (6) are including rotating post (601) and second motor (602), second motor (602) fixed mounting is at installation machine case (1) upper surface, second motor (602) output shaft runs through to installation machine case (1) inner wall, second motor (602) output shaft fixed mounting has third gear (603), rotate post (601) through third bearing rotation and install at installation machine case (1) inner wall.

6. The drilling equipment for road and bridge construction according to claim 5, wherein: the rotary column is characterized in that a fourth gear (604) is fixedly arranged at one end of the rotary column (601), the fourth gear (604) and the third gear (603) are meshed with each other to rotate, a transmission rod (605) is slidably arranged on the inner wall of the rotary column (601), a second mounting plate (606) is fixedly arranged on the lower surface of the transmission rod (605), one end of the transmission rod (605) is rotatably arranged on the lower surface of the first mounting plate (507) through a fourth bearing, and a drill bit (607) is fixedly arranged on the lower surface of the second mounting plate (606).

7. A drilling apparatus for road and bridge construction as claimed in claim 2, wherein: the dust fall subassembly (9) is including collar (901) and pipeline (903), collar (901) inner wall fixed mounting has a plurality of shower nozzles (902) of group, pipeline (903) fixed mounting is at collar (901) surface, pipeline (903) pass through a plurality of shower nozzles (902) of group of pipe connection, pipeline (903) one end runs through to the installation machine case (1) outside, pipeline (903) one end fixed mounting has valve (904), collar (901) upper surface fixed mounting has shielding cover (905).

8. A drilling apparatus for road and bridge construction as claimed in claim 1, wherein: the positioning assembly (3) comprises a positioning ring (301), two groups of positioning strips (302) are fixedly arranged at two ends of the positioning ring (301), a first baffle (303) is fixedly arranged at one end of each positioning strip (302), a slot block (304) is fixedly arranged at the other end of each positioning strip (302), a second baffle (305) is slidably arranged on the inner wall of each slot block (304), a slope (306) is formed at one end of each positioning strip (302), and guide rails (307) are fixedly arranged on the upper surfaces of the positioning strips (302).