CN221641500U

CN221641500U - High-precision automobile lamp mold

Info

Publication number: CN221641500U
Application number: CN202420129704.8U
Authority: CN
Inventors: 蒋海东; 庄世勇
Original assignee: Guangzhou Yiyuan Plastic Cement Hardware Mould Co ltd
Current assignee: Guangzhou Yiyuan Plastic Cement Hardware Mould Co ltd
Priority date: 2024-01-18
Filing date: 2024-01-18
Publication date: 2024-09-03
Anticipated expiration: 2034-01-18

Abstract

The utility model discloses a high-precision automobile lamp mold, which comprises a box body with an opening at the top, wherein two automobile lamp mold bottom molds are arranged above the box body, an iron fixture block is fixedly connected to the bottom of each automobile lamp mold bottom mold, a supporting box with an opening at the bottom is fixedly embedded on the inner wall of the bottom of the box body, and an annular filter plate is fixedly connected between the outer side of the supporting box and the inner wall of the box body. The utility model has the advantages that a series of structures are arranged, so that the two car lamp die bottom dies can be conveniently and alternately utilized in a rotating and exchanging way, the left car lamp die bottom dies can be conveniently and always washed, cleaned and dried, the left operation mode is matched through the rotating and exchanging and alternately utilized, the processing work can be synchronously carried out during cleaning and material taking and discharging, the material taking and discharging and cleaning adjustment work is not required to be independently consumed, the working efficiency is improved, the car lamp die bottom dies can be conveniently and flexibly disassembled and replaced according to different car lamps, and the use flexibility is improved.

Description

High-precision automobile lamp mold

Technical Field

The utility model relates to the technical field of automobile lamp molds, in particular to a high-precision automobile lamp mold.

Background

The car lamp die is a common tool for producing or processing car lamps, the traditional car lamp die has single function and usually has no structure for automatically cleaning the inside of a die cavity, so that the surface quality of car lamp product production is easily affected and the production precision is affected in the use process of the car lamp die;

In view of the above, the disclosure CN220008588U discloses a high-precision automobile lamp mold, which comprises a bottom mold base, wherein the top of the bottom mold base is connected with a bottom mold through a rotating shaft, a lamp mold cavity is respectively arranged at the top and the bottom of the bottom mold, a cleaning chamber communicated with the bottom of the bottom mold is arranged in the bottom mold base, and a water spraying pipe is arranged in the cleaning chamber; after one-time injection molding is carried out, the bottom die is adjusted to rotate under the operation of the motor, so that the positions of two car lamp die cavities on the bottom die are switched, the car lamp die cavities after molding operation are switched to the top of the cleaning chamber, and the spray nozzle arranged on the spray pipe sprays clear water to the car lamp die cavities, so that the effects of cleaning and cooling the surfaces of the car lamp die cavities can be achieved.

According to the high-precision automobile lamp mold disclosed by the technology, the bottom mold is driven to turn over after the mold is used, cleaning work is realized in a mode of spraying water in the mold cavity, the precision is prevented from being influenced by residual impurities, and the following defects still exist: 1. by means of single longitudinal overturning for adjustment and cleaning, the operation of adjusting the discharging of the materials into the die cavity is required to be carried out in a single time consuming manner during overturning and cleaning, the operation of cleaning, taking out and discharging of the materials can not be carried out while the use is not affected, and the working efficiency is not ideal; 2. the bottom die cannot be independently disassembled, assembled and replaced, so that the device is inconvenient to be applied to different car lamp dies, and the use flexibility is not ideal; in view of this, we propose a high precision automotive lamp mold.

Disclosure of utility model

The utility model aims to provide a high-precision automobile lamp die for solving the problems in the background technology.

In order to achieve the above purpose, the present utility model provides the following technical solutions: the high-precision automobile lamp mold comprises a box body with an opening at the top, two automobile lamp mold bottom molds are arranged above the box body, an iron fixture block is fixedly connected to the bottom of each automobile lamp mold bottom mold, a supporting box with an opening at the bottom is fixedly embedded on the inner wall of the bottom of the box body, an annular filter plate is fixedly connected between the outer side of the supporting box and the inner wall of the box body, and water filled in the box body is arranged below the annular filter plate;

The top of the supporting box is sealed and rotated and embedded with a turntable, an output shaft is fixedly arranged on the inner wall of the right side of the supporting box and is fixedly connected with a band-type brake motor at the bottom of the turntable, the top of the turntable is fixedly connected with two vertical guide turning driving components, the tops of the two vertical guide turning driving components are fixedly connected with the same cross rod, two ends of the cross rod are hinged with supports, the bottoms of the two supports are respectively hinged with the corresponding vertical guide turning driving components, an iron fixture block is magnetically clamped at the top of the corresponding support, the turntable is driven to rotate by the band-type brake motor, and the two vertical guide turning driving components are used for driving the two car lamp die dies to rotate and change alternately when the turntable rotates and are used for driving the car lamp die dies which are not used to rotate to the left side to turn downwards;

The left inner wall of the box body is embedded and fixed with a rectangular box, the right side of the rectangular box is communicated and fixed with a plurality of tube heads, the left side of the rectangular box is provided with a hot air unidirectional supply assembly and a unidirectional water supply assembly, the right end of the unidirectional water supply assembly extends into the box body, the hot air unidirectional supply assembly and the unidirectional water supply assembly are used for respectively supplying hot air and water into the rectangular box, and the hot air are utilized to sequentially clean and dry the bottom die of the car lamp die after overturning downwards.

Preferably, the vertical guide turning driving assembly comprises vertical guide rods fixedly connected to the top of the turntable, the top ends of the two vertical guide rods are fixedly connected with the bottom of the cross rod, an L-shaped sliding block is sleeved on the vertical guide rods in a sliding manner, connecting rods which are obliquely arranged are hinged to the repulsive sides of the two L-shaped sliding blocks, the two connecting rods are symmetrically arranged, one repulsive ends of the two connecting rods are respectively hinged to the bottom of the corresponding support, two electric telescopic rods are fixedly arranged at the bottom of the cross rod, and the extending ends of the electric telescopic rods are fixedly connected with the inner walls of the bottoms of the corresponding L-shaped sliding blocks; when the turntable rotates, the two supports are driven to rotate sequentially through the two vertical guide rods and the cross rod, the two supports are utilized to drive the two lamp die bottom molds to rotate and change positions for alternate utilization, the left L-shaped sliding block is driven to move downwards by the left electric telescopic rod, the left L-shaped sliding block drives the left support to overturn downwards through the left connecting rod, and the left support drives the left lamp die bottom molds to rotate to the left.

Preferably, the hot air unidirectional supply assembly comprises a first one-way valve which is fixedly connected to the top of the left side of the rectangular box, the right side of the first one-way valve is an outlet, a wind collecting cover is fixedly connected to the left side of the first one-way valve, and a hot air blower with an air outlet on the right side is fixedly connected to the left side of the wind collecting cover.

Preferably, the one-way water supply assembly comprises a second one-way valve which is fixedly connected to the left bottom of the rectangular box, the right side of the second one-way valve is an outlet, a water pump is fixedly arranged at the left bottom of the box body, an L-shaped pipe is fixedly connected between the water outlet of the water pump and the left side of the second one-way valve, and the right end of the water inlet of the water pump extends into the box body.

Preferably, the four corners of the bottom of the box body are fixedly connected with supporting legs, and the right side of the bottom of the box body is fixedly communicated with a liquid discharge valve.

Preferably, the top fixedly connected with battery case of horizontal pole has the battery in the battery case, and two electric telescopic handle all with battery electric connection, electric telescopic handle's front side is fixed and electric connection has wireless remote control switch, and wireless remote control switch matches and is provided with external remote controller.

Preferably, a rectangular clamping groove is formed in the top of the support, a magnet block is fixedly connected to the inner wall of the bottom of the rectangular clamping groove, and an iron clamping block is movably clamped in the corresponding rectangular clamping groove and is adsorbed with the magnet block.

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

1. According to the high-precision automobile lamp mold, through the cooperation of the two automobile lamp mold bottom molds, the box body, the band-type brake motor, the vertical guide turning driving assembly, the cross rod and the support, the two automobile lamp mold bottom molds can be rotated, exchanged and alternatively utilized, and the automobile lamp mold bottom molds on the right side can not be influenced in the process of taking and discharging on the left side in an exchanging and alternative utilization mode;

2. According to the high-precision automobile lamp mold, the automobile lamp mold bottom mold can be driven to rotate downwards to the left side through the vertical guide turning driving assembly, the support, the automobile lamp mold bottom mold, the hot air one-way feeding assembly, the one-way water supply assembly, the rectangular box and the pipe head, and the automobile lamp mold bottom mold on the left side is always washed, cleaned and dried;

3. This high accuracy car light mould, through support, rectangle draw-in groove and the magnet piece cooperation that sets up, can be according to the car light of difference to the convenient nimble dismouting of car light mould die block change, improve the flexibility of use.

The utility model has the advantages that a series of structures are arranged, so that the two car lamp die bottom dies can be conveniently and alternately utilized in a rotating and exchanging way, the left car lamp die bottom dies can be conveniently and always washed, cleaned and dried, the left operation mode is matched through the rotating and exchanging and alternately utilized, the processing work can be synchronously carried out during cleaning and material taking and discharging, the material taking and discharging and cleaning adjustment work is not required to be independently consumed, the working efficiency is improved, the car lamp die bottom dies can be conveniently and flexibly disassembled and replaced according to different car lamps, and the use flexibility is improved.

Drawings

Fig. 1 is a schematic diagram of a front view structure of a high-precision automobile lamp mold according to the present utility model;

FIG. 2 is a schematic cross-sectional view of a high-precision automotive lamp mold according to the present utility model;

fig. 3 is an enlarged schematic view of the portion a in fig. 2 according to the present utility model.

In the figure: 100. a bottom die of a car lamp die; 101. an iron clamping block; 1. a case; 2. a support box; 3. a turntable; 4. a band-type brake motor; 5. a vertical guide rod; 6. an L-shaped slider; 7. a connecting rod; 8. a support; 9. a cross bar; 10. an electric telescopic rod; 11. a rectangular box; 12. a tube head; 13. a first one-way valve; 14. an air heater; 15. a second one-way valve; 16. a water pump; 17. an annular filter plate; 18. a rectangular clamping groove; 19. a magnet block.

Detailed Description

The following description of the embodiments of the present utility model will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present utility model, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

As shown in fig. 1 to 3, the high-precision automobile lamp mold provided by the embodiment comprises a box body 1 with an opening at the top, two lamp mold bottom molds 100 are arranged above the box body 1, an iron clamping block 101 is fixedly connected to the bottom of the lamp mold bottom mold 100, a supporting box 2 with an opening at the bottom is fixedly embedded and fixed on the inner wall of the bottom of the box body 1, an embedded hole fixedly connected with the outer side of the supporting box 2 is formed in the inner wall of the bottom of the box body 1, an annular filter plate 17 is fixedly connected between the outer side of the supporting box 2 and the inner wall of the box body 1, water filled in the box body 1 is arranged below the annular filter plate 17, supporting legs are fixedly connected to four corners of the bottom of the box body 1, a drain valve is fixedly communicated with the right side of the bottom of the box body 1, and the drain valve is used for draining water in the box body 1 when the automobile lamp mold is not used;

The top of the supporting box 2 is hermetically and rotatably embedded with a turntable 3, wherein a circular hole is formed in the top of the supporting box 2, a sealing bearing is fixedly sleeved in the circular hole, an inner ring of the sealing bearing is fixedly sleeved on the outer side of the turntable 3, the effect of sealing and rotatably installing the turntable 3 is achieved, an internal contracting brake motor 4 with an output shaft fixedly connected with the bottom of the turntable 3 is fixedly installed on the inner wall on the right side of the supporting box 2, two vertical guide turnover driving components are fixedly connected with the same cross rod 9 on the top of the turntable 3, two ends of the cross rod 9 are hinged with supports 8, the bottoms of the two supports 8 are respectively hinged with the corresponding vertical guide turnover driving components, an iron clamping block 101 is magnetically clamped on the top of the corresponding support 8, a rectangular clamping groove 18 is formed in the top of the support 8, a magnet block 19 is fixedly connected on the inner wall at the bottom of the rectangular clamping groove 18, the iron clamping block 101 is movably clamped in the corresponding rectangular clamping groove 18 and is adsorbed with the magnet block 19, the effect of conveniently and quickly and magnetically clamping and fixedly installing the iron clamping block 101 is achieved, so that a car lamp 100 is conveniently inserted and removed and installed to the car lamp motor 100, when the two vertical guide turnover driving components are used for driving a bottom die 100 to be alternately rotated by using the turntable 3 to a bottom die 100, and when the two car lamp is not used for driving a bottom die 100 to be turned and a bottom die is rotated to be used for driving a bottom die 100;

The left inner wall of the box body 1 is embedded and fixed with a rectangular box 11, wherein the left inner wall of the box body 1 is provided with a rectangular embedded hole fixedly connected with the outer side of the rectangular box 11, the rectangular box 11 is embedded and fixed on the left inner wall of the box body 1 through the rectangular embedded hole, the right side of the rectangular box 11 is communicated and fixed with a plurality of tube heads 12, the left side of the rectangular box 11 is provided with a hot air unidirectional supply assembly and a unidirectional water supply assembly, the right end of the unidirectional water supply assembly extends into the box body 1, the hot air unidirectional supply assembly and the unidirectional water supply assembly are used for respectively supplying hot air and water into the rectangular box 11, and the automobile lamp mold bottom die 100 after the downward overturning is cleaned and dried sequentially by utilizing the water and the hot air.

Specifically, the vertical guide turning driving assembly comprises vertical guide rods 5 fixedly connected to the top of the turntable 3, the top ends of the two vertical guide rods 5 are fixedly connected with the bottom of a transverse rod 9, an L-shaped sliding block 6 is sleeved on the vertical guide rods 5 in a sliding manner, vertical guide holes sleeved on the outer sides of the corresponding vertical guide rods 5 are formed in the tops of the L-shaped sliding blocks 6 in a sliding manner, the L-shaped sliding blocks 6 are sleeved on the corresponding vertical guide rods 5 in a sliding manner through the vertical guide holes, the effect of vertical sliding guiding of the L-shaped sliding blocks 6 is achieved, the repellent sides of the two L-shaped sliding blocks 6 are hinged with obliquely arranged connecting rods 7, the two connecting rods 7 are symmetrically arranged, the repellent ends of the two connecting rods 7 are respectively hinged with the bottoms of corresponding supports 8, two electric telescopic rods 10 are fixedly arranged at the bottoms of the transverse rod 9, the extending ends of the electric telescopic rods 10 are fixedly connected with the inner walls of the bottoms of the corresponding L-shaped sliding blocks 6, a battery box is fixedly connected to the tops of the transverse rod 9, a storage battery is arranged in the battery box, the two electric telescopic rods 10 are electrically connected with the storage battery, the front sides of the electric telescopic rods 10 are fixedly and electrically connected with wireless remote control switches, the wireless remote control switches are arranged on the outer sides of the storage batteries, and the wireless remote control switches are matched with the two electric remote control rods 10, and the wireless remote control switches are used for the corresponding to be provided with the wireless remote control and are conveniently used for the remote control of the two electric telescopic rods; the vertical guide rod 5, the L-shaped sliding block 6, the connecting rod 7 and the electric telescopic rod 10 are arranged to be matched, when the turntable 3 rotates, the two supports 8 are driven to rotate sequentially through the two vertical guide rods 5 and the cross rod 9, the two supports 8 are utilized to drive the two lamp mold bottom molds 100 to rotate and change positions to be utilized alternately, the lamp mold bottom molds 100 on the right side can be utilized alternately, the left-side L-shaped sliding block 6 is driven to displace downwards by the left-side electric telescopic rod 10, the left-side L-shaped sliding block 6 drives the left-side supports 8 to overturn downwards through the left-side connecting rod 7, and the left-side supports 8 drive the left-side lamp mold bottom molds 100 to rotate to the left.

Further, the hot air unidirectional supply assembly comprises a first unidirectional valve 13 communicated and fixed at the top of the left side of the rectangular box 11, the right side of the first unidirectional valve 13 is an outlet, the left side of the first unidirectional valve 13 is communicated and fixed with a wind collecting cover, and the left side of the wind collecting cover is communicated and fixed with a hot air blower 14 with the right side being an air outlet; the air heater 14, the air collecting cover and the first one-way valve 13 are matched, so that the effect of one-way feeding of hot air into the rectangular box 11 is achieved.

Further, the unidirectional water supply assembly comprises a second unidirectional valve 15 which is fixedly communicated with the bottom of the left side of the rectangular box 11, the right side of the second unidirectional valve 15 is an outlet, a water pump 16 is fixedly arranged at the bottom of the left side of the box body 1, an L-shaped pipe is fixedly communicated between the water outlet of the water pump 16 and the left side of the second unidirectional valve 15, and the right end of a water inlet of the water pump 16 extends into the box body 1; the second check valve 15, the L-shaped pipe and the water pump 16 are matched to achieve the effect of unidirectional water supply into the rectangular box 11.

The application method of the embodiment is as follows: the corresponding car light objects are respectively put into the two car light die bottom molds 100, the car light die bottom mold 100 on the right side is used, the car light die bottom mold 100 on the left side is used for standby, after the car light die bottom mold 100 on the right side is used, the band-type brake motor 4 is directly and positively started to drive the rotary table 3 to rotate, the rotary table 3 sequentially drives the two supports 8 to horizontally rotate through the two vertical guide rods 5 and the cross rod 9, the two supports 8 drive the two car light die bottom molds 100 to horizontally rotate and change positions, the car light die bottom mold 100 originally positioned on the left side is rotated to the right side for utilization, the car light die bottom mold 100 after the right side is rotated to the left side for taking materials, then personnel can take the materials in the car light die bottom mold 100 positioned on the left side at the moment, then the electric telescopic rod 10 positioned on the left side at the moment is positively started, the left electric telescopic rod 10 drives the left L-shaped sliding block 6 to slide downwards on the left vertical guide rod 5, the left L-shaped sliding block 6 drives the left support 8 to overturn downwards through the left connecting rod 7, the left support 8 drives the left lamp mold bottom mold 100 to rotate to the left, at the moment, the water pump 16 is started to pump water in the box body 1 and sequentially pump the water into the rectangular box 11 through the L-shaped pipe and the second one-way valve 15, the water is sprayed rightward through the plurality of pipe heads 12 to flush the inside of the left lamp mold bottom mold 100, after flushing, the water pump 16 is closed and the hot air 14 is started, the hot air 14 supplies hot air into the rectangular box 11 through the first one-way valve 13, the hot air is sprayed out through the plurality of pipe heads 12 to dry the lamp mold bottom mold 100, after drying is completed, the left electric telescopic rod 10 is reversely started to enable the left electric telescopic rod 10 to sequentially pass through the left L-shaped sliding block 6 and the connecting rod 7 to drive the support 8 and the lamp mold bottom mold 100 to rotate upwards to the horizontal, then, a person can put materials into the left lamp mold bottom mold 100 again, and the lamp mold bottom molds 100 on the right side are used and then are subjected to rotary exchange and alternate utilization, and through the rotary exchange and alternate utilization of the two lamp mold bottom molds 100, the left lamp mold bottom mold 100 is always matched with the mode of taking materials, washing, cleaning and drying, so that the influence on the lamp mold bottom mold 100 on the right side is avoided, the machining work can be synchronously performed during cleaning and taking materials, the time consumption is not required to be independently spent for taking materials, cleaning and adjusting, and the working efficiency is improved;

When the car lamp die bottom die 100 is dismounted and replaced according to different car lamps, the car lamp die bottom die 100 is directly pulled upwards, the car lamp die bottom die 100 drives the corresponding iron clamping block 101 to be separated from the rectangular clamping groove 18 and the magnet block 19 upwards, the disassembly is completed, the iron clamping block 101 at the bottom of the new car lamp die bottom die 100 is clamped into the corresponding rectangular clamping groove 18 downwards, the iron clamping block 101 is adsorbed with the corresponding magnet block 19, the car lamp die bottom die 100 is fixed by the convenient magnetic clamping device, and the car lamp die bottom die 100 is convenient to be dismounted and replaced flexibly by the magnetic clamping device, so that the use flexibility is improved.

Finally, it should be noted that: the foregoing description is only a preferred embodiment of the present utility model, and the present utility model is not limited thereto, but it is to be understood that modifications and equivalents of some of the technical features described in the foregoing embodiments may be made by those skilled in the art, although the present utility model has been described in detail with reference to the foregoing embodiments. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present utility model should be included in the protection scope of the present utility model.

Claims

1. The utility model provides a high accuracy car lamp mould, includes box (1) that the top set up for the opening, the top of box (1) is equipped with two car lamp mould die block (100), and the bottom fixedly connected with iron fixture block (101) of car lamp mould die block (100), its characterized in that: a supporting box (2) with an opening at the bottom is embedded and fixed on the inner wall of the bottom of the box body (1), an annular filter plate (17) is fixedly connected between the outer side of the supporting box (2) and the inner wall of the box body (1), and water filled in the box body (1) is arranged below the annular filter plate (17);

The top of the supporting box (2) is sealed and rotationally embedded with a rotary table (3), an output shaft is fixedly arranged on the inner wall of the right side of the supporting box (2) and is fixedly connected with a band-type brake motor (4) at the bottom of the rotary table (3), the top of the rotary table (3) is fixedly connected with two vertical guide turning driving components, the tops of the two vertical guide turning driving components are fixedly connected with the same cross rod (9), two ends of the cross rod (9) are hinged with supports (8), the bottoms of the two supports (8) are respectively hinged with the corresponding vertical guide turning driving components, and an iron clamping block (101) is magnetically clamped at the top of the corresponding support (8);

The hot air unidirectional water supply device is characterized in that a rectangular box (11) is fixedly embedded on the inner wall of the left side of the box body (1), a plurality of tube heads (12) are fixedly connected to the right side of the rectangular box (11), a hot air unidirectional water supply assembly and a unidirectional water supply assembly are arranged on the left side of the rectangular box (11), and the right end of the unidirectional water supply assembly extends into the box body (1).

2. A high precision automotive lamp mold as defined in claim 1, wherein: the vertical guide turning driving assembly comprises vertical guide rods (5) fixedly connected to the top of the rotary table (3), the top ends of the vertical guide rods (5) are fixedly connected with the bottom of the transverse rod (9), an L-shaped sliding block (6) is sleeved on the vertical guide rods (5) in a sliding mode, connecting rods (7) are hinged to one repellent side of each L-shaped sliding block (6), the two connecting rods (7) are symmetrically arranged, one repellent end of each connecting rod (7) is hinged to the bottom of a corresponding support (8) respectively, two electric telescopic rods (10) are fixedly installed at the bottom of the transverse rod (9), and the extending ends of the electric telescopic rods (10) are fixedly connected with the inner walls of the bottoms of the corresponding L-shaped sliding blocks (6).

3. A high precision automotive lamp mold as defined in claim 1, wherein: the hot air unidirectional supply assembly comprises a first one-way valve (13) which is fixedly connected to the top of the left side of the rectangular box (11), the right side of the first one-way valve (13) is an outlet, a wind collecting cover is fixedly connected to the left side of the first one-way valve (13), and a hot air blower (14) with an air outlet is fixedly connected to the left side of the wind collecting cover.

4. A high precision automotive lamp mold as defined in claim 1, wherein: the one-way water supply assembly comprises a second one-way valve (15) which is fixedly connected to the left side bottom of the rectangular box (11), the right side of the second one-way valve (15) is an outlet, a water pump (16) is fixedly arranged at the left side bottom of the box body (1), an L-shaped pipe is fixedly connected between the water outlet of the water pump (16) and the left side of the second one-way valve (15), and the right end of a water inlet of the water pump (16) extends into the box body (1).

5. A high precision automotive lamp mold as defined in claim 1, wherein: the bottom four corners of box (1) all fixedly connected with landing leg, the bottom right side intercommunication of box (1) is fixed with the flowing back valve.

6. A high precision automotive lamp mold as defined in claim 1, wherein: the top fixedly connected with battery case of horizontal pole (9), built-in battery that has of battery case, two electric telescopic handle (10) all with battery electric connection, the front side of electric telescopic handle (10) is fixed and electric connection has wireless remote control switch, and wireless remote control switch matches and is provided with outside remote controller.

7. A high precision automotive lamp mold as defined in claim 1, wherein: rectangular clamping grooves (18) are formed in the tops of the supports (8), magnet blocks (19) are fixedly connected to the inner walls of the bottoms of the rectangular clamping grooves (18), and iron clamping blocks (101) are movably clamped in the corresponding rectangular clamping grooves (18) and are adsorbed to the magnet blocks (19).