CN221936270U - A kind of tool for polishing injection molded parts - Google Patents

Abstract

The application discloses an injection molding part polishing tool, which belongs to the field of injection molding part processing devices and comprises a processing table, wherein an installation frame is fixedly arranged at the top end of the processing table, a clamping assembly is arranged in the installation frame, a supporting box is fixedly arranged on the inner wall of the top end of the installation frame, a supporting block is slidably arranged in the supporting box, the bottom end of the supporting block penetrates through the supporting box in a sliding manner, a polishing assembly is arranged at the bottom end of the supporting block, a second air cylinder is fixedly arranged at one side of the installation frame, and a piston shaft of the second air cylinder penetrates through the supporting box in a sliding manner and is fixedly connected with one side opposite to the supporting block; and a supporting plate is fixedly arranged on one side of the processing table. According to the application, through the cooperation of the dust extractor, the filter frame and the dust suction hopper, the dust suction effect is achieved, dust is prevented from being scattered in the air, the pollution of equipment to the environment is reduced, and the filter assembly is arranged in the filter frame, the dust suction effect is achieved, the dust is helped to enter the dust extractor, and the follow-up use of the equipment is facilitated.

Description

A kind of tool for polishing injection molded parts

Technical Field

The present application relates to the field of injection molded parts processing equipment, and more specifically, to an injection molded parts grinding tool.

Background Art

Injection molded parts refer to various injection molded products produced by injection molding machines, including various packages, parts, etc. They are mainly made of materials such as polyethylene or polypropylene and added with a variety of organic solvents. After the injection molded parts are processed, there will be burrs on the surface of the injection molded parts. The burrs on the surface of the injection molded parts need to be polished by the polishing component to increase the aesthetics of the injection molded parts.

The patent with application number 202122364583.4 discloses a device for polishing injection molded parts, comprising: a stage on which a first slide is provided: a clamping slide block, one end of which is slidably located in the first slide groove: a blocking block, one end of which is fixed to the stage; a first driving member for driving the clamping slide block to slide in the first slide groove, the first driving member being arranged on the stage: a second driving member, the bottom end of which is connected to a moving plate that moves up and down: a third driving member, which is arranged on the moving plate; a fourth driving member, which is connected to the third driving member: a polishing roller, which is located directly above the stage, and the polishing roller is connected to the fourth driving member. The overall structure of the application is simple, the operation is simple, the polishing efficiency is high, and the polishing effect is good.

With respect to the above-mentioned related technologies, the injection molded parts are stably clamped by clamping sliders and blocking blocks to avoid affecting the grinding process, and the grinding rollers are stably moved and rotated up and down and left and right by the second driving member, the third driving member and the fourth driving member to complete the grinding and deburring of the injection molded parts. When the equipment is grinding the injection molded parts, a large amount of dust may be generated. The dust directly diffuses into the air, which may cause pollution to the environment and reduce the practicality of the equipment.

Utility Model Content

In order to solve the above problems, the present application provides an injection molded part grinding tool, which adopts the following technical solution:

A tool for polishing injection molded parts, comprising a processing table, a mounting frame fixedly mounted on the top of the processing table, a clamping assembly arranged in the mounting frame, a support box fixedly mounted on the inner wall of the top of the mounting frame, a support block slidably mounted in the support box, the bottom end of the support block slides through the support box, a polishing assembly is arranged at the bottom end of the support block, a second cylinder is fixedly mounted on one side of the mounting frame, and a piston shaft of the second cylinder slides through the support box and is fixedly connected to a side opposite to the support block;

A support plate is fixedly mounted on one side of the processing table, and a dust extractor is fixedly mounted on the top of the support plate, a filter frame is fixedly mounted on the top of the processing table, and a connecting pipe is connected between the filter frame and the dust extractor, a dust hopper is slidably penetrated through the top of the processing table, and a multi-way joint is fixedly mounted on the side of the dust hopper away from the mounting frame, and a telescopic pipe is connected between the multi-way joint and the filter frame, and a filter assembly is arranged in the filter frame;

Two symmetrically distributed support blocks are fixedly installed on both sides of the processing table, and a screw is rotatably installed between the two support blocks in the same group. The side walls of the two screws are sleeved with a stabilizing block, and the two stabilizing blocks are fixedly connected to the side opposite to the dust hopper, and a driving assembly is provided between the two screws.

By adopting the above technical solution, when the equipment is used, the staff puts the injection molded part on the top of the processing table and fixes the injection molded part through the clamping assembly, which helps to prevent the injection molded part from moving during grinding. After the injection molded part is fixed, the injection molded part can be polished by the grinding assembly, and the support block can be driven by the second cylinder to move synchronously with the grinding assembly, so that the equipment can grind different positions of the injection molded part. When the grinding assembly grinds the injection molded part, a large amount of dust will be generated. The suction force is generated by the vacuum cleaner, and the dust is sucked into the filter frame through the dust hopper and the telescopic tube. The filter frame is filtered by the filter. The setting of the components plays a role in filtering and absorbing dust, which helps to prevent dust from entering the dust extractor and facilitates the subsequent continuous use of the equipment. The top of the filter frame is provided with a sealing plate and a sealing gasket to seal the filter frame. The driving component drives the screw to rotate, so that the stabilizing block located on the side wall of the screw moves, and the two stabilizing blocks move synchronously with the dust hopper, which plays a role in adjusting the distance between the dust hopper and the blister, making it convenient for the equipment to grind injection molded parts of different sizes. The dust hopper can also push the injection molded parts to move, making it convenient for the equipment to grind different positions of the injection molded parts, thereby improving the practicality of the equipment.

Furthermore, the clamping assembly includes a first cylinder fixedly mounted on both sides of the mounting frame, the two first cylinder piston shafts slide through the mounting frame, and the two first cylinder piston shaft ends are fixedly mounted with clamps, the tops of the two clamps are fixedly mounted with mounting plates, and auxiliary plates are provided under the two mounting plates, and two symmetrically distributed second telescopic rods are fixedly mounted on the bottom ends of the two mounting plates, and the ends of the two second telescopic rods in the same group are fixedly connected to the tops of the auxiliary plates on the same side.

By adopting the above technical solution, when the staff places the injection-molded part on the processing table, the first cylinder drives the clamping plate to move toward the injection-molded part so that the clamping plate contacts the opposite side of the injection-molded part, thereby clamping and stabilizing the injection-molded part. After the clamping plate contacts the injection-molded part, the second telescopic rod drives the auxiliary plate of the same group to move downward and contact the top of the injection-molded part, thereby pressing and fixing the injection-molded part, which is beneficial to improving the stability of the placement of the injection-molded part.

Furthermore, the grinding assembly includes a first telescopic rod fixedly mounted on the bottom end of the support block, and a grinder is provided at the end of the first telescopic rod.

By adopting the above technical solution, when the injection molded part is fixed, the grinder can be driven to descend by the first telescopic rod to avoid contact between the grinder and the injection molded part, thereby achieving the effect of grinding the injection molded part.

Furthermore, the filter assembly includes a filter screen slidably installed in a filter frame, in which two symmetrically distributed dust-absorbing cottons are slidably installed, and sliders are fixedly installed on both sides of the filter screen and the dust-absorbing cotton. The inner wall of the filter frame is provided with a sliding groove matching the slider on the same side.

By adopting the above technical solution, when dust enters the filter frame, the filter screen and dust-absorbing cotton inside the filter frame can filter and absorb dust, which helps to avoid sealing the inside of the vacuum cleaner and facilitates the subsequent use of the equipment. The filter screen and dust-absorbing cotton are fixed by the slider and the slide groove opened on the inner wall of the filter frame, which is convenient for the staff to disassemble and replace later, which is beneficial to maintain the filtering effect of the equipment.

Furthermore, a support plate is fixedly installed in the filter frame, a support rod is rotatably installed on the side of the support plate close to the filter screen, and a turbine fan blade is fixedly sleeved on the side wall of the support rod, and two symmetrically distributed brush plates are fixedly installed on the side wall of the support rod away from the support plate, and the two brush plates are in contact with the opposite side of the filter screen.

By adopting the above technical solution, suction is generated by the vacuum cleaner, and the suction acts on the turbine blades, so that the turbine blades drive the support rod to rotate, and the support rod rotates synchronously with the brush plate. The brush plate can clean the filter, which helps to avoid clogging of the filter, and is beneficial to maintaining the filtering effect of the equipment.

Furthermore, the driving assembly includes a connecting rod fixedly installed on one end of the screw, the connecting rod is away from one end of the screw in the same group and penetrates the support block on the same side, and the two connecting rods penetrate the side walls of one end of the support block and are fixedly sleeved with driven gears, an installation groove is opened in the processing table, and a dual-axis motor is fixedly installed in the installation groove, the piston shafts at both ends of the dual-axis motor slide through the processing table and are fixedly sleeved with driving gears, and the driving gear is meshed with the driven gear in the same group.

By adopting the above technical solution, the driving gear is driven by a dual-axis motor to rotate, the driving gear drives the same group of driven gears to rotate, the driven gear drives the same group of connecting rods to rotate, and the connecting rods drive the same group of screws to rotate, so that the two stabilizing blocks move synchronously with the dust hopper, which plays a role in adjusting the position of the dust hopper on the processing table, making it convenient for the equipment to grind injection molded parts of different sizes and to absorb dust. The dust hopper can drive the injection molded parts to be pushed, making it convenient for the equipment to grind different positions of the subsequent injection molded parts.

Furthermore, limit blocks are fixedly installed on both sides of the support block, and the inner wall of the support box is provided with limit grooves matching the limit blocks on the same side.

By adopting the above technical solution, when the support block moves in the support box, the support block slides in the limiting groove with the limiting block. The cooperation between the limiting block and the limiting groove is conducive to maintaining the stability of the movement of the support block.

In summary, this application includes the following beneficial technical effects:

(1) In the present application, the vacuum cleaner, the filter frame and the dust hopper cooperate to achieve dust collection, which helps to prevent dust from being spread into the air and reduces the pollution of the equipment to the environment. The filter frame is provided with a filter component to filter and absorb dust, which helps to force the dust into the vacuum cleaner, making it easier for the equipment to be used later.

(2) In the present application, the driving assembly is provided to drive the dust hopper to move above the processing table and adjust the distance between the dust hopper and the mounting frame, so that the equipment can grind injection molded parts of different sizes.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG1 is a schematic structural diagram of an injection molded part grinding tool;

FIG2 is an enlarged view of A in FIG1 of the present application;

FIG3 is an enlarged view of B in FIG1 of the present application;

FIG4 is a cross-sectional view of the present application;

FIG. 5 is a cross-sectional view of the filter frame in the present application.

Description of the numbers in the figure:

1. Processing table; 2. First cylinder; 3. Mounting frame; 4. Second cylinder; 5. Support box; 6. First telescopic rod; 7. Grinder; 8. Dust hopper; 9. Multi-way joint; 10. Telescopic tube; 11. Slider; 12. Filter; 13. Dust cotton; 14. Dust extractor; 15. Support plate; 16. Screw; 17. Stabilizing block; 18. Support block; 19. Connecting rod; 20. Driving gear; 21. Driven gear; 22. Clamp; 23. Mounting plate; 24. Second telescopic rod; 25. Auxiliary plate; 26. Support block; 27. Mounting slot; 28. Dual-axis motor; 29. Support plate; 30. Turbine blade; 31. Support rod; 32. Brush plate; 33. Filter frame.

DETAILED DESCRIPTION

The technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application; obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments, and all other embodiments obtained by ordinary technicians in this field based on the embodiments in the present application without making creative work are within the scope of protection of the present application.

In the description of the present application, it should be noted that the terms "upper", "lower", "inner", "outer", "top/bottom" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific position, be constructed and operated in a specific position, and therefore cannot be understood as limiting the present application. In addition, the terms "first" and "second" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

In the description of this application, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "provided with", "set/connected", "connected", etc. should be understood in a broad sense. For example, "connected" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

The present application is further described in detail below in conjunction with Figures 1-5.

Please refer to Figures 1-5, an injection molded part grinding tool, including a processing table 1, a mounting frame 3 is fixedly installed on the top of the processing table 1, and a clamping assembly is arranged in the mounting frame 3, the clamping assembly includes a first cylinder 2 fixedly installed on both sides of the mounting frame 3, the piston shafts of the two first cylinders 2 are slidably penetrated through the mounting frame 3, and the ends of the piston shafts of the two first cylinders 2 are fixedly installed with clamping plates 22, the tops of the two clamping plates 22 are fixedly installed with mounting plates 23, and auxiliary plates 25 are arranged under the two mounting plates 23, and the bottoms of the two mounting plates 23 are fixedly installed with two second extensions symmetrically distributed. The retractable rod 24, the ends of the two second telescopic rods 24 in the same group are fixedly connected to the top of the auxiliary plate 25 on the same side. When the equipment is in use, the staff places the injection molded part on the top of the processing table 1, and then drives the clamping plate 22 to move toward the injection molded part through the first cylinder 2, so that the clamping plate 22 contacts the side opposite to the injection molded part, which can play the role of clamping and stabilizing the injection molded part. After the clamping plate 22 contacts the injection molded part, the auxiliary plate 25 in the same group is driven to move down and contact the top of the injection molded part through the second telescopic rod 24, which can play the role of pressing and fixing the injection molded part, which is beneficial to improve the stability of the placement of the injection molded part.

A support box 5 is fixedly installed on the inner wall of the top of the mounting frame 3, and a support block 26 is slidably installed in the support box 5. The bottom end of the support block 26 slides through the support box 5, and a grinding assembly is provided at the bottom end of the support block 26, and the grinding assembly includes a first telescopic rod 6 fixedly installed on the bottom end of the support block 26, and a grinder 7 is provided at the end of the first telescopic rod 6. A second cylinder 4 is fixedly installed on one side of the mounting frame 3, and the piston shaft of the second cylinder 4 slides through the support box 5 and is fixedly connected to the side opposite to the support block 26. Limit blocks are fixedly installed on both sides of the support block 26, and a limit groove matching the limit block on the same side is provided on the inner wall of the support box 5. When the injection molded part is fixed, the grinder 7 can be driven to descend by the first telescopic rod 6 to avoid contact between the grinder 7 and the injection molded part, so as to play the role of grinding the injection molded part, and the support block 26 can be driven by the second cylinder 4 to move synchronously with the grinder 7, so that the equipment can grind different positions of the injection molded part.

A support plate 15 is fixedly installed on one side of the processing table 1, and a dust extractor 14 is fixedly installed on the top of the support plate 15. A filter frame 33 is fixedly installed on the top of the processing table 1, and a connecting pipe is connected between the filter frame 33 and the dust extractor 14. A dust hopper 8 is slidably penetrated through the top of the processing table 1, and a multi-way joint 9 is fixedly installed on the side of the dust hopper 8 away from the mounting frame 3, and a telescopic pipe 10 is connected between the multi-way joint 9 and the filter frame 33. A filter assembly is arranged in the filter frame 33, and the filter assembly includes a filter screen 12 slidably installed in the filter frame 33. Two symmetrically distributed dust cottons 13 are slidably installed in the filter frame 33. Slide blocks 11 are fixedly installed on both sides of the filter screen 12 and the dust cotton 13. The filter frame 33 The inner wall is provided with a slide groove that matches the slider 11 on the same side. When the polishing component polishes the injection molded part, a large amount of dust will be generated. The vacuum cleaner 14 generates suction, and the suction force drives the dust into the filter frame 33 through the dust hopper 8 and the telescopic tube 10, thereby absorbing the dust, which is beneficial to reducing the pollution of the equipment to the environment. The filter screen 12 and the dust-absorbing cotton 13 are arranged inside the filter frame 33 to filter and absorb dust, which helps to avoid sealing the inside of the vacuum cleaner 14 and is convenient for the subsequent use of the equipment. The filter screen 12 and the dust-absorbing cotton 13 are both fixed by the slide groove provided on the inner wall of the slider 11 and the filter frame 33, which is convenient for the staff to disassemble and replace later, which is beneficial to maintain the filtering effect of the equipment.

A support plate 29 is fixedly installed in the filter frame 33, and a support rod 31 is rotatably installed on the side of the support plate 29 close to the filter screen 12, and a turbine blade 30 is fixedly sleeved on the side wall of the support rod 31, and two symmetrically distributed brush plates 32 are fixedly installed on the side wall of the support rod 31 away from the support plate 29. The two brush plates 32 are in contact with the opposite side of the filter screen 12, and suction is generated by the dust extractor 14. The suction acts on the turbine blades 30, so that the turbine blades 30 drive the support rod 31 to rotate, and the support rod 31 rotates synchronously with the brush plates 32. The brush plates 32 can clean the filter screen 12, which helps to avoid clogging of the filter screen 12, and is beneficial to maintaining the filtering effect of the equipment.

Two symmetrically distributed support blocks 18 are fixedly installed on both sides of the processing table 1, and a screw 16 is rotatably installed between the two support blocks 18 of the same group, and the side walls of the two screws 16 are sleeved with a stabilizing block 17, and the two stabilizing blocks 17 are fixedly connected to the side opposite to the dust hopper 8. A driving assembly is provided between the two screws 16, and the driving assembly includes a connecting rod 19 fixedly installed at one end of the screw 16, and the connecting rod 19 is away from the end of the same group of screws 16 and penetrates the support block 18 on the same side, and the two connecting rods 19 penetrate the side wall of one end of the support block 18 and are fixedly sleeved with a driven gear 21. A mounting groove 27 is opened in the processing table 1, and a dual-axis motor 28 is fixedly installed in the mounting groove 27, and the dual-axis motor 2 The piston shafts at both ends of 8 slide through the processing table 1 and are fixedly sleeved with a driving gear 20, and the driving gear 20 is meshed with the driven gear 21 of the same group. The driving gear 20 is driven to rotate by the dual-axis motor 28, and the driving gear 20 drives the driven gear 21 of the same group to rotate, and the driven gear 21 drives the connecting rod 19 of the same group to rotate, and the connecting rod 19 drives the screw 16 of the same group to rotate, so that the two stabilizing blocks 17 move synchronously with the dust hopper 8, which plays a role in adjusting the position of the dust hopper 8 on the processing table 1, so that the equipment can grind injection molded parts of different sizes and absorb dust. The dust hopper 8 can drive the injection molded parts, so that the equipment can grind different positions of the subsequent injection molded parts.

The implementation principle of the embodiment of the present application is as follows: when the equipment is in use, the staff places the injection molded part on the top of the processing table 1, and fixes the injection molded part by the clamping assembly, which helps to prevent the injection molded part from moving during grinding. After the injection molded part is fixed, the injection molded part can be grinded by the grinding assembly, and the support block 26 can be driven by the second cylinder 4 to move synchronously, so that the equipment can grind different positions of the injection molded part. When the grinding assembly grinds the injection molded part, a large amount of dust will be generated, and the suction force will be generated by the dust extractor 14, and the dust will enter the filter frame 33 through the dust hopper 8 and the telescopic tube 10. The filter frame 33 is filled with the dust of the filter assembly. The setting plays the role of filtering and absorbing dust, which helps to prevent dust from entering the dust extractor 14 and facilitates the subsequent continuous use of the equipment. The top of the filter frame 33 is provided with a sealing plate and a sealing gasket to seal the filter frame 33. The driving assembly drives the screw 16 to rotate, so that the stabilizing block 17 located on the side wall of the screw 16 moves, and the two stabilizing blocks 17 move synchronously with the dust hopper 8, which plays the role of adjusting the distance between the dust hopper 8 and the blister, so that the equipment can grind injection molded parts of different sizes, and the dust hopper 8 can be used to push the injection molded parts to move, so that the equipment can grind different positions of the injection molded parts, thereby improving the practicality of the equipment.

The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims (7)

1. A tool for polishing injection molded parts, comprising a processing table (1), characterized in that: a mounting frame (3) is fixedly mounted on the top of the processing table (1), and a clamping assembly is arranged inside the mounting frame (3); a support box (5) is fixedly mounted on the inner wall of the top of the mounting frame (3), and a support block (26) is slidably mounted inside the support box (5); the bottom end of the support block (26) slides through the support box (5), and a polishing assembly is arranged at the bottom end of the support block (26); a second cylinder (4) is fixedly mounted on one side of the mounting frame (3), and a piston shaft of the second cylinder (4) slides through the support box (5) and is fixedly connected to the side opposite to the support block (26); A support plate (15) is fixedly mounted on one side of the processing table (1), and a dust extractor (14) is fixedly mounted on the top of the support plate (15); a filter frame (33) is fixedly mounted on the top of the processing table (1), and a connecting pipe is connected between the filter frame (33) and the dust extractor (14); a dust hopper (8) is slidably penetrated through the top of the processing table (1), and a multi-way joint (9) is fixedly mounted on the side of the dust hopper (8) away from the mounting frame (3), and a telescopic pipe (10) is connected between the multi-way joint (9) and the filter frame (33), and a filter assembly is provided in the filter frame (33); Two symmetrically distributed support blocks (18) are fixedly installed on both sides of the processing table (1), and a screw rod (16) is rotatably installed between the two support blocks (18) in the same group. The side walls of the two screw rods (16) are sleeved with a stabilizing block (17), and the two stabilizing blocks (17) are fixedly connected to the side opposite to the dust hopper (8), and a driving component is provided between the two screw rods (16). 2. An injection molded part polishing tool according to claim 1, characterized in that: the clamping assembly includes a first cylinder (2) fixedly mounted on both sides of a mounting frame (3), the piston shafts of the two first cylinders (2) slide through the mounting frame (3), and the ends of the piston shafts of the two first cylinders (2) are fixedly mounted with clamps (22), the tops of the two clamps (22) are fixedly mounted with mounting plates (23), and auxiliary plates (25) are provided below the two mounting plates (23), and the bottom ends of the two mounting plates (23) are fixedly mounted with two symmetrically distributed second telescopic rods (24), and the ends of the two second telescopic rods (24) in the same group are fixedly connected to the tops of the auxiliary plates (25) on the same side. 3. An injection molded part grinding tool according to claim 1, characterized in that: the grinding assembly comprises a first telescopic rod (6) fixedly mounted on the bottom end of the support block (26), and a grinder (7) is provided at the end of the first telescopic rod (6). 4. An injection molded part polishing tool according to claim 1, characterized in that: the filter assembly includes a filter screen (12) slidably installed in a filter frame (33), two symmetrically distributed dust-absorbing cottons (13) are slidably installed in the filter frame (33), and sliders (11) are fixedly installed on both sides of the filter screen (12) and the dust-absorbing cotton (13), and the inner wall of the filter frame (33) is provided with a slide groove matching the slider (11) on the same side. 5. A tool for polishing injection molded parts according to claim 4, characterized in that: a support plate (29) is fixedly installed in the filter frame (33), a support rod (31) is rotatably installed on the side of the support plate (29) close to the filter screen (12), and a turbine fan blade (30) is fixedly sleeved on the side wall of the support rod (31), and two symmetrically distributed brush plates (32) are fixedly installed on the side wall of the support rod (31) away from the support plate (29), and the two brush plates (32) are in contact with the side opposite to the filter screen (12). 6. An injection molded part grinding tool according to claim 1, characterized in that: the driving assembly includes a connecting rod (19) fixedly mounted on one end of the screw (16), the connecting rod (19) is away from the end of the screw (16) in the same group and penetrates the support block (18) on the same side, and the two connecting rods (19) penetrate the side wall of one end of the support block (18) and are fixedly sleeved with a driven gear (21), the processing table (1) is provided with a mounting groove (27), and a dual-axis motor (28) is fixedly mounted in the mounting groove (27), the piston shafts at both ends of the dual-axis motor (28) slide through the processing table (1) and are fixedly sleeved with a driving gear (20), and the driving gear (20) is meshed with the driven gear (21) in the same group. 7. An injection molded part polishing tool according to claim 1, characterized in that: limit blocks are fixedly installed on both sides of the support block (26), and the inner wall of the support box (5) is provided with a limit groove matching the limit block on the same side.