Straight type drilling machining device with anti-deviation structure

Abstract

The utility model relates to the field of drilling machining devices, and discloses a straight drilling machining device with an anti-deviation structure, which comprises a supporting assembly. The drilling device further comprises a plate body limiting assembly, a fixing assembly, a mounting assembly, a drilling assembly and a pressing assembly. The upper end of the supporting assembly is provided with a plate body limiting assembly used for limiting and storing plate-shaped materials. A fixing assembly is arranged at the upper end of the supporting assembly. A mounting assembly for mounting is arranged at the upper end of the fixing assembly; a drilling assembly used for drilling is arranged on the mounting assembly; a pressing assembly used for pressing the plate is arranged at the upper end of the fixing assembly. According to the drilling mechanism, the springs are arranged, a plate placed at the upper end of the bearing block can make contact with the lower ends of the pressing columns firstly, the springs can be compressed along with continuous upward movement of the plate, the plate can be more stably fixed under the pressure action of the two pressing columns, stable drilling of the plate is facilitated, and the position of the drilling mechanism can be conveniently and rapidly adjusted.

Description

Technical Field

[0001] The utility model belongs to the field of drilling processing devices, and in particular relates to a straight drilling processing device with an anti-deviation structure. Background Art

[0002] A straight drilling processing device is a device used to perform drilling processing on a workpiece, usually used for metal processing, woodworking or processing of other materials. During the product processing, in order to improve the processing accuracy and stability and prevent the drill bit from shifting during the processing or causing poor processing quality due to vibration, an anti-shift structure is usually set to clamp and fix the product. However, the straight drilling processing device in the prior art is usually not convenient for quickly limiting and fixing the plate-shaped product, it is difficult to improve the stability of the plate-shaped product during drilling, and it is not convenient to quickly adjust the position of the drilling mechanism, which needs further improvement. Utility Model Content

[0003] In order to overcome the problems that the straight drilling processing device in the prior art is usually not convenient for quickly limiting and fixing the plate-shaped product, it is difficult to improve the stability of the plate-shaped product during drilling, and it is not convenient to quickly adjust the position of the drilling mechanism.

[0004] The technical solution of the utility model is: a straight drilling processing device with an anti-deviation structure, including a supporting assembly; also including a plate limiting assembly, a fixing assembly, an installation assembly, a drilling assembly and a pressing assembly; the upper end of the supporting assembly is provided with a plate limiting assembly for limiting the storage of plate-shaped materials; the upper end of the supporting assembly is provided with a fixing assembly; the upper end of the fixing assembly is provided with an installation assembly for installation; the installation assembly is provided with a drilling assembly for drilling; the upper end of the fixing assembly is provided with a pressing assembly for pressing the plate.

[0005] Preferably, when in use, the plate limiting assembly is placed on the supporting assembly, and then the plate limiting assembly is limited by the fixing assembly, and the installation assembly is installed on the fixing assembly. When it is necessary to drill a hole in the plate in the plate limiting assembly, the supporting assembly is opened to make the plate limiting assembly rise, and the plate limiting assembly will be limited and moved along the fixing assembly. At the same time, the drilling assembly is opened, and the plate stored in the plate limiting assembly will be passively drilled by the drilling assembly due to the lifting and lowering. Before drilling, the plate will first be pressed by the pressing assembly, which can improve the stability of the plate during drilling. This solves the problem that the straight drilling processing device in the prior art is usually not convenient for quickly limiting and fixing the plate-shaped product, it is difficult to improve the stability of the plate-shaped product during drilling, and it is not convenient to quickly adjust the position of the drilling mechanism.

[0006] Preferably, the support assembly includes a support platform, a first trough body and a hydraulic cylinder; the first trough body is opened through the center of the upper and lower ends of the support platform; the lower end of the support platform is fixedly connected to evenly distributed hydraulic cylinders; the outer wall of the telescopic rod of the hydraulic cylinder is in contact with the inner wall of the left and right ends of the first trough body, and the telescopic rod of the hydraulic cylinder can be used to lift and lower the plate limit assembly by opening the hydraulic cylinder.

[0007] Preferably, the plate limiting assembly includes a U-shaped plate, a second groove body, a movable body, a storage groove, a supporting block and a first through hole; the upper end of the support table is fixedly connected to the U-shaped plate; the lower end of the U-shaped plate is penetrated by a second groove body; the inner wall of the second groove body and the inner wall of the first groove body are in the same plane; the movable body is movably arranged on the inner walls of the left and right ends of the U-shaped plate; the upper end of the movable body is provided with a storage groove; the upper part of the inner wall of the front and rear ends of the movable body is fixedly connected to a supporting block; the lower end of the storage groove is penetrated by evenly distributed first through holes; the movable body is an inverted "U" shaped structure, and the movable body is placed on the inner walls of the left and right ends of the U-shaped plate, and the plate is placed on the inner wall of the storage groove, and the lower end of the plate is made to fit with the upper end of the supporting block, the plate will be limited by the inner wall of the storage groove, and the waste chips generated during drilling can fall down through the first through hole.

[0008] Preferably, the fixing assembly includes a fixing body, a first mounting groove, a screw hole, a second mounting groove, a second through hole, a first mounting plate, a third through hole and a movable column; the upper end of the support platform is fixedly connected to the fixing body; the left and right ends of the fixing body are penetrated with uniformly distributed first mounting grooves; the left and right ends of the fixing body are penetrated with uniformly distributed screw holes and second mounting grooves; the upper and lower ends of the fixing body are penetrated with second through holes; the second through holes and the interior of the first mounting groove are mutually connected; the inner wall of the first mounting groove is movably provided with a first mounting plate; the center of the upper and lower ends of the first mounting plate is penetrated with a third through hole; the inner walls of the third through hole and the second through hole are movably provided with movable columns, and the first mounting plate is placed on the inner wall of the first mounting groove, and then the movable column is placed on the inner walls of the third through hole and the second through hole, so that the first mounting plate can be placed quickly and stably, and the front and rear ends of the movable body are limited by the two first mounting plates. In this way, when the movable body moves up and down, the movable body can be limited by the two first mounting plates, thereby facilitating the stable movement of the movable body in the vertical direction.

[0009] Preferably, the installation assembly includes a fixed block, a fourth through hole, a slider, a connecting block and an electric cylinder; the upper end of the fixed body is fixedly connected to the fixed block; the left half of the fixed block is a rectangular parallelepiped; the right half of the fixed block is a "T"-shaped structure; the left and right ends of the fixed block are penetrated by evenly distributed fourth through holes; a slider is movably installed on the outer wall of the right half of the fixed block; the left end of the slider is fixedly connected to the connecting block; two electric cylinders are fixedly connected to the left end of the connecting block; the right end of the telescopic rod of the electric cylinder penetrates the connecting block and extends to the inner wall of the fourth through hole, and the slider can slide along the outer wall of the right half of the fixed block. After the slider slides to a suitable position, the electric cylinder is turned on so that the telescopic rod of the electric cylinder passes through the connecting block and extends to the inner wall of the fourth through hole, so that the connecting block can be stably placed.

[0010] Preferably, the drilling assembly includes a frame, a motor and a drill rod; the right end of the connecting block is fixedly connected to the frame; the upper end of the frame is fixedly connected to the motor; the lower end of the output shaft of the motor passes through the frame and is fixedly connected to the drill rod through a coupling, and the motor is turned on to rotate the drill rod, and when the plate moves upward, it can be drilled by the drill rod in a high-speed rotating state.

[0011] Preferably, the clamping assembly includes a second mounting plate, a fixing plate, a bolt, a spring, a pressure column, a fifth through hole and a limiting column; a second mounting plate is movably provided on the inner wall of the second mounting slot; the upper end of the second mounting plate is fixedly connected to the fixing plate; bolts are installed with through-type threads at the left and right ends of the fixing plate; the left end of the bolt passes through the fixing plate and is threadedly installed on the inner wall of the screw hole; a spring is fixedly connected to the lower end of the second mounting plate; the lower end of the spring is fixedly connected to the pressure column; the upper center of the pressure column is fixedly connected to the limiting column; fifth through holes are penetrated at the upper and lower ends of the second mounting plate; the inner wall of the fifth through hole fits with the outer wall of the limiting column; the pressure column is located directly above the internal space of the storage slot. When the movable body moves upward, the plate placed on the upper end of the bearing block will first contact the lower end of the pressure column. As the plate continues to move upward, the spring will be compressed, and at the same time, the limiting column will move along the inner wall of the fifth through hole. The plate can be more stably fixed under the pressure of the two pressure columns, thereby facilitating stable drilling of the plate.

[0012] Beneficial effects of the utility model:

[0013] 1. By placing the movable body on the inner walls of the left and right ends of the U-shaped plate, placing the plate on the inner wall of the storage groove, and making the lower end of the plate fit with the upper end of the bearing block, the plate will be limited by the inner wall of the storage groove, and the waste chips generated during drilling can fall down through the first through hole, and the hydraulic cylinder is turned on to use the telescopic rod of the hydraulic cylinder to lift and lower the plate limit assembly, and the motor is turned on to rotate the drill rod. When the plate moves upward, it can be drilled by the drill rod in a high-speed rotating state. When the movable body moves upward, the plate placed on the upper end of the bearing block will first contact the lower end of the pressure column. As the plate continues to move upward, the spring will be compressed, and at the same time, the limit column will move along the inner wall of the fifth through hole. The plate can be more stably fixed under the pressure of the two pressure columns, thereby facilitating stable drilling of the plate, solving the problem that the straight drilling processing device in the prior art is usually not convenient for quickly limiting and fixing the plate-shaped product, and it is difficult to improve the stability of the plate-shaped product during drilling;

[0014] 2. The slider can slide along the outer wall of the right half of the fixed block. After the slider slides to a suitable position, the electric cylinder is turned on so that the telescopic rod of the electric cylinder passes through the connecting block and extends to the inner wall of the fourth through hole, so that the connecting block can be stably placed, solving the problem that the vertical drilling processing device in the prior art is usually inconvenient to quickly adjust the position of the drilling mechanism;

[0015] 3. By placing the first mounting plate on the inner wall of the first mounting groove and then placing the movable column on the inner walls of the third through hole and the second through hole, the first mounting plate can be quickly and stably placed, and the front and rear ends of the movable body are limited by the two first mounting plates. In this way, when the movable body moves up and down, the movable body can be limited by the two first mounting plates, thereby facilitating the stable movement of the movable body in the vertical direction. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 What is shown is a three-dimensional structural schematic diagram of a straight drilling processing device with an anti-deviating structure of the utility model;

[0017] Figure 2 What is shown is a three-dimensional structural schematic diagram of a support assembly of a straight drilling processing device with an anti-deviating structure of the utility model;

[0018] Figure 3 Shown is a three-dimensional structural schematic diagram of a U-shaped plate of a straight drilling processing device with an anti-deviating structure of the utility model;

[0019] Figure 4 The three-dimensional structure schematic diagram of the movable body of a straight drilling processing device with an anti-deviating structure of the utility model is shown;

[0020] Figure 5What is shown is a three-dimensional structural schematic diagram of a fixing component of a straight drilling processing device with an anti-deviating structure of the utility model;

[0021] Figure 6 The present invention shows a schematic diagram of a three-dimensional split structure of a first mounting plate and a movable column of a straight drilling processing device with an anti-deviating structure;

[0022] Figure 7 The present invention shows a schematic diagram of the three-dimensional split structure of the mounting assembly and the drilling assembly of a straight drilling processing device with an anti-deviating structure;

[0023] Figure 8 What is shown is a three-dimensional structural schematic diagram of a clamping assembly of a straight drilling processing device with an anti-deviating structure of the utility model.

[0024] The markings in the accompanying drawings are: 1-support assembly, 101-support platform, 102-first trough, 103-hydraulic cylinder, 2-plate limit assembly, 201-U-shaped plate, 202-second trough, 203-movable body, 204-storage slot, 205-bearing block, 206-first through hole, 3-fixing assembly, 301-fixing body, 302-first mounting slot, 303-screw hole, 304-second mounting slot, 305-second through hole, 306-first mounting Mounting plate, 307-third through hole, 308-movable column, 4-mounting assembly, 401-fixed block, 402-fourth through hole, 403-slider, 404-connecting block, 405-electric cylinder, 5-drilling assembly, 501-frame, 502-motor, 503-drill rod, 6-clamping assembly, 601-second mounting plate, 602-fixed plate, 603-bolt, 604-spring, 605-pressure column, 606-fifth through hole, 607-limiting column. DETAILED DESCRIPTION

[0025] The utility model is further described below in conjunction with the accompanying drawings and embodiments.

[0026] See also Figure 1 The utility model provides an embodiment: a straight drilling processing device with an anti-drift structure, including a support component 1; also including a plate limiting component 2, a fixing component 3, an installation component 4, a drilling component 5 and a clamping component 6; the upper end of the support component 1 is provided with a plate limiting component 2 for limiting the storage of plate-shaped materials; the upper end of the support component 1 is provided with a fixing component 3; the upper end of the fixing component 3 is provided with an installation component 4 for installation; the installation component 4 is provided with a drilling component 5 for drilling; the upper end of the fixing component 3 is provided with a clamping component 6 for clamping the plate.

[0027] See also Figure 2In this embodiment, the support assembly 1 includes a support platform 101, a first slot body 102 and a hydraulic cylinder 103; the first slot body 102 is opened through the center of the upper and lower ends of the support platform 101; the lower end of the support platform 101 is fixedly connected to the hydraulic cylinders 103 which are evenly distributed; the outer wall of the telescopic rod of the hydraulic cylinder 103 is in contact with the inner wall of the left and right ends of the first slot body 102.

[0028] See also Figure 3 and 4 In this embodiment, the plate limiting assembly 2 includes a U-shaped plate 201, a second slot 202, a movable body 203, a storage slot 204, a bearing block 205 and a first through hole 206; the upper end of the support platform 101 is fixedly connected with the U-shaped plate 201; the lower end of the U-shaped plate 201 is penetrated with a second slot 202; the inner wall of the second slot 202 and the inner wall of the first slot 102 are in the same plane; the movable body 203 is movably provided on the inner walls of the left and right ends of the U-shaped plate 201; the storage slot 204 is opened at the upper end of the movable body 203; the bearing block 205 is fixedly connected to the upper part of the inner wall of the front and rear ends of the movable body 203; the lower end of the storage slot 204 is penetrated with uniformly distributed first through holes 206; the movable body 203 is an inverted "U" shaped structure.

[0029] See also Figure 5 and 6 In this embodiment, the fixing assembly 3 includes a fixing body 301, a first mounting groove 302, a screw hole 303, a second mounting groove 304, a second through hole 305, a first mounting plate 306, a third through hole 307 and a movable column 308; the upper end of the support platform 101 is fixedly connected to the fixing body 301; the left and right ends of the fixing body 301 are penetrated with uniformly distributed first mounting grooves 302; the left and right ends of the fixing body 301 are penetrated with uniformly distributed screw holes 303 and second mounting grooves 304; the upper and lower ends of the fixing body 301 are penetrated with second through holes 305; the second through hole 305 and the interior of the first mounting groove 302 are mutually connected; the inner wall of the first mounting groove 302 is movably provided with a first mounting plate 306; the upper and lower ends of the first mounting plate 306 are penetrated with a third through hole 307 in the center; the inner walls of the third through hole 307 and the second through hole 305 are movably provided with movable columns 308.

[0030] See also Figure 7In this embodiment, the mounting assembly 4 includes a fixed block 401, a fourth through hole 402, a slider 403, a connecting block 404 and an electric cylinder 405; the upper end of the fixed body 301 is fixedly connected with the fixed block 401; the left half of the fixed block 401 is a rectangular parallelepiped; the right half of the fixed block 401 is a "T"-shaped structure; the left and right ends of the fixed block 401 are penetrated with uniformly distributed fourth through holes 402; the outer wall of the right half of the fixed block 401 is movably mounted with a slider 403; the slider 403 The left end of the connecting block 404 is fixedly connected to the connecting block 404; the left end of the connecting block 404 is fixedly connected to two electric cylinders 405; the right end of the telescopic rod of the electric cylinder 405 passes through the connecting block 404 and extends to the inner wall of the fourth through hole 402; the drilling assembly 5 includes a frame 501, a motor 502 and a drill rod 503; the right end of the connecting block 404 is fixedly connected to the frame 501; the upper end of the frame 501 is fixedly connected to the motor 502; the lower end of the output shaft of the motor 502 passes through the frame 501 and is fixedly connected to the drill rod 503 through a coupling.

[0031] See also Figure 8 In this embodiment, the clamping assembly 6 includes a second mounting plate 601, a fixing plate 602, a bolt 603, a spring 604, a pressure column 605, a fifth through hole 606 and a limiting column 607; the second mounting plate 601 is movably provided on the inner wall of the second mounting groove 304; the upper end of the second mounting plate 601 is fixedly connected to the fixing plate 602; the bolts 603 are threadedly installed on the left and right ends of the fixing plate 602; the left end of the bolt 603 passes through the fixing plate 602 and is threadedly installed on the inner wall of the screw hole 303; the lower end of the second mounting plate 601 is fixedly connected to the spring 604; the lower end of the spring 604 is fixedly connected to the pressure column 605; the upper end of the pressure column 605 is fixedly connected to the limiting column 607; the upper and lower ends of the second mounting plate 601 are penetrated by the fifth through hole 606; the inner wall of the fifth through hole 606 is in contact with the outer wall of the limiting column 607; the pressure column 605 is located directly above the internal space of the storage slot 204.

[0032] When working, first, place the movable body 203 on the inner walls of the left and right ends of the U-shaped plate 201, place the plate on the inner wall of the storage slot 204, and make the lower end of the plate fit with the upper end of the bearing block 205, the plate will be limited by the inner wall of the storage slot 204, place the first mounting plate 306 on the inner wall of the first mounting slot 302, and then place the movable column 308 on the inner wall of the third through hole 307 and the second through hole 305, so as to realize the rapid and stable placement of the first mounting plate 306, and use the two first mounting plates 306 to limit the front and rear ends of the movable body 203, so that when the movable body 203 moves up and down, the movable body 203 can be limited by the two first mounting plates 306, so as to facilitate the stable movement of the movable body 203 in the vertical direction;

[0033] Afterwards, the slider 403 can be slid along the outer wall of the right half of the fixed block 401. After the slider 403 slides to a suitable position, the electric cylinder 405 is turned on so that the telescopic rod of the electric cylinder 405 passes through the connecting block 404 and extends to the inner wall of the fourth through hole 402, so that the connecting block 404 can be stably placed.

[0034] Then, the hydraulic cylinder 103 is turned on and the telescopic rod of the hydraulic cylinder 103 can be used to lift and lower the plate limit assembly 2, and the motor 502 is turned on to rotate the drill rod 503. When the plate moves upward, it can be drilled by the drill rod 503 in a high-speed rotating state;

[0035] When the movable body 203 moves upward, the plate placed on the upper end of the supporting block 205 will first contact the lower end of the pressure column 605. As the plate continues to move upward, the spring 604 will be compressed, and at the same time, the limit column 607 will move along the inner wall of the fifth through hole 606. The plate can be more stably fixed under the pressure of the two pressure columns 605, which is conducive to stable drilling of the plate.

[0036] Through the above steps, when in use, the plate limiting component 2 is placed on the supporting component 1, and then the fixing component 3 is used to limit the plate limiting component 2, and the installation component 4 is installed on the fixing component 3. When it is necessary to drill a hole in the plate in the plate limiting component 2, the supporting component 1 is opened to make the plate limiting component 2 rise, and the plate limiting component 2 will be limited and moved along the fixing component 3, and the drilling component 5 is opened at the same time. The plate stored in the plate limiting component 2 will be passively drilled by the drilling component 5 due to the lifting and lowering. Before drilling, the plate will be first pressed by the pressing component 6, which can improve the stability of the plate during drilling, thereby solving the problem that the straight drilling processing device in the prior art is usually not convenient for quickly limiting and fixing the plate-shaped product, it is difficult to improve the stability of the plate-shaped product during drilling, and it is not convenient to quickly adjust the position of the drilling mechanism.

[0037] The embodiments of the present invention are described in detail above in conjunction with the accompanying drawings, but the present invention is not limited to the above embodiments, and various changes can be made within the knowledge scope of those skilled in the art without departing from the purpose of the present invention.

Claims

1. A straight drilling device with an anti-deviating structure, comprising a support assembly (1); characterized in that: It also comprises a plate limiting assembly (2), a fixing assembly (3), a mounting assembly (4), a drilling assembly (5) and a pressing assembly (6); the upper end of the supporting assembly (1) is provided with a plate limiting assembly (2) for limiting the position of the plate-shaped material for storage; the upper end of the supporting assembly (1) is provided with a fixing assembly (3); the upper end of the fixing assembly (3) is provided with a mounting assembly (4) for mounting; the mounting assembly (4) is provided with a drilling assembly (5) for drilling; the upper end of the fixing assembly (3) is provided with a pressing assembly (6) for pressing the plate; The support assembly (1) comprises a support platform (101), a first trough (102) and a hydraulic cylinder (103); the first trough (102) is provided through the center of the upper and lower ends of the support platform (101); the lower end of the support platform (101) is fixedly connected to the hydraulic cylinders (103) which are evenly distributed; the outer wall of the telescopic rod of the hydraulic cylinder (103) is connected to the outer wall of the telescopic rod of the hydraulic cylinder (103); The inner walls of the left and right ends of the first tank body (102) are in contact with each other; The plate limiting assembly (2) comprises a U-shaped plate (201), a second slot body (202), a movable body (203), a storage slot (204), a bearing block (205) and a first through hole (206); the upper end of the support platform (101) is fixedly connected to the U-shaped plate (201); the lower end of the U-shaped plate (201) is penetrated by a second slot body (202); the inner wall of the second slot body (202) and the inner wall of the first slot body (102) are in the same plane; the movable body (203) is movably arranged on the inner walls at the left and right ends of the U-shaped plate (201); the upper end of the movable body (203) is provided with a storage slot (204); the upper part of the inner wall at the front and rear ends of the movable body (203) is fixedly connected to the bearing block (205); the lower end of the storage slot (204) is penetrated by a uniformly distributed first through holes (206); the movable body (203) is in an inverted "U"-shaped structure.

2. A straight drilling device with an anti-deviating structure according to claim 1, characterized in that: The fixing assembly (3) comprises a fixing body (301), a first mounting groove (302), a screw hole (303), a second mounting groove (304), a second through hole (305), a first mounting plate (306), a third through hole (307) and a movable column (308); the upper end of the support platform (101) is fixedly connected to the fixing body (301); the left and right ends of the fixing body (301) are penetrated by evenly distributed first mounting grooves (302); the left and right ends of the fixing body (301) are penetrated by evenly distributed screw holes (303). The fixing body (301) has a second through hole (305) extending through the upper and lower ends of the fixing body (301); the second through hole (305) and the interior of the first through hole (302) are interconnected; a first mounting plate (306) is movably provided on the inner wall of the first mounting groove (302); a third through hole (307) is provided through the center of the upper and lower ends of the first mounting plate (306); and a movable column (308) is movably provided on the inner wall of the third through hole (307) and the second through hole (305).

3. The straight drilling device with an anti-deviating structure according to claim 2, characterized in that: The mounting assembly (4) comprises a fixed block (401), a fourth through hole (402), a slider (403), a connecting block (404) and an electric cylinder (405); the upper end of the fixed body (301) is fixedly connected to the fixed block (401); the left half of the fixed block (401) is a rectangular parallelepiped; the right half of the fixed block (401) is a "T"-shaped structure; the left and right ends of the fixed block (401) are penetrated by evenly distributed fourth through holes (402); the outer wall of the right half of the fixed block (401) is movably mounted with a slider (403); the left end of the slider (403) is fixedly connected to the connecting block (404); the left end of the connecting block (404) is fixedly connected to two electric cylinders (405); the right end of the telescopic rod of the electric cylinder (405) penetrates the connecting block (404) and extends to the inner wall of the fourth through hole (402).

4. The straight drilling device with an anti-deviating structure according to claim 3, characterized in that: The drilling assembly (5) comprises a frame (501), a motor (502) and a drill rod (503); the right end of the connecting block (404) is fixedly connected to the frame (501); the upper end of the frame (501) is fixedly connected to the motor (502); the lower end of the output shaft of the motor (502) passes through the frame (501) and is fixedly connected to the drill rod (503) via a coupling.

5. The straight drilling device with an anti-deviating structure according to claim 2, characterized in that: The clamping assembly (6) comprises a second mounting plate (601), a fixing plate (602), a bolt (603), a spring (604), a pressure column (605), a fifth through hole (606) and a limiting column (607); the second mounting plate (601) is movably provided on the inner wall of the second mounting groove (304); the fixing plate (602) is fixedly connected to the upper end of the second mounting plate (601); bolts (603) are threadedly installed at the left and right ends of the fixing plate (602); the left end of the bolt (603) passes through the fixing plate ( 602) is threadedly installed on the inner wall of the screw hole (303); the lower end of the second mounting plate (601) is fixedly connected to a spring (604); the lower end of the spring (604) is fixedly connected to a pressure column (605); the center of the upper end of the pressure column (605) is fixedly connected to a limiting column (607); the upper and lower ends of the second mounting plate (601) are penetrated by a fifth through hole (606); the inner wall of the fifth through hole (606) is in contact with the outer wall of the limiting column (607); the pressure column (605) is located directly above the internal space of the storage slot (204).

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