CN219859222U

CN219859222U - Automatic feeding roller transportation line

Info

Publication number: CN219859222U
Application number: CN202320613540.1U
Authority: CN
Inventors: 张俊峰; 凌家盛
Original assignee: Shenzhen Constant Temperature Precision Control Intelligent Equipment Co ltd
Current assignee: Shenzhen Constant Temperature Precision Control Intelligent Equipment Co ltd
Priority date: 2023-03-13
Filing date: 2023-03-13
Publication date: 2023-10-20
Anticipated expiration: 2033-03-13

Abstract

The utility model discloses an automatic feeding roller conveying line, which comprises the following components: frame subassembly, roller subassembly, lifting unit and support clamping assembly, roller subassembly installs and sets up in frame subassembly's top, frame subassembly is equipped with the loading space, the loading space is used for placing and treats the material loading tray, lifting unit and support clamping assembly encircle the loading space respectively and install and set up in frame subassembly's inside, roller subassembly is equipped with the feed inlet with the loading space intercommunication, lifting unit and support clamping assembly are used for jacking the tray that is located the loading space to the feed inlet jointly, roller subassembly is used for transporting the tray that is located the feed inlet to next operation station. Above-mentioned automatic feeding cylinder transportation line can make the tray according to the route of marcing of presetting strength, and accurate arrival next operation station under the effect of cylinder subassembly has avoided appearing the route deviation and has led to the condition that appears the deviation when next operation station receives the tray, has realized the accurate material loading of tray, has improved production efficiency.

Description

Automatic feeding roller transportation line

Technical Field

The utility model relates to the technical field of material conveying, in particular to an automatic feeding roller conveying line.

Background

With the progress of scientific technology, materials in the production process can be automatically conveyed to each operation station through a transmission line body under the assistance of an automatic operation machine, particularly materials related to the production and manufacturing process of the battery cell are conveyed to each operation station under the loading of a tray, so that the quick and convenient conveying and transferring of the materials of the battery cell are completed, and the automatic and efficient production and manufacturing of the battery cell are realized.

In the production process of the battery cell, the feeding of the tray is often performed from the side of the mechanism, or from the lower side of the mechanism, so that the tray is placed on a roller conveying line and driven by the roller conveying line to enter the next operation station for loading materials.

However, when the conventional tray feeding mechanism is used for placing the tray into the roller conveying line, the tray is easy to shift laterally, and deviates from a preset advancing path, so that a next operation station is greatly deviated when receiving the tray, and manual intervention is needed for correction, or a positioning component is added for correction, so that the production and manufacturing cost is increased, and meanwhile, the efficiency of cell production and manufacturing is reduced.

Disclosure of Invention

Based on this, the technical problem that need to aim at how to realize the accurate material loading of tray improves production efficiency provides an automatic feeding cylinder transportation line.

An automatic feeding roller transportation line, the automatic feeding roller transportation line comprising: the roller assembly is arranged at the top of the frame assembly, the frame assembly is provided with a feeding space for placing a tray to be fed,

the lifting component and the supporting and clamping component respectively surround the feeding space and are arranged in the frame component,

the roller assembly is provided with a feeding hole communicated with the feeding space, the lifting assembly and the supporting and clamping assembly are jointly used for lifting the tray located in the feeding space to the feeding hole, and the roller assembly is used for conveying the tray located in the feeding hole to a next operation station.

In one embodiment, the roller assembly comprises a mounting frame, a stepping motor, long rollers and short rollers, the mounting frame is mounted on the top end of the frame assembly, the long rollers are sequentially rotatably mounted on the front end area and the rear end area of the mounting frame, the short rollers are respectively rotatably mounted on two sides of the middle area of the mounting frame, a feeding port is formed between the short rollers on two sides of the mounting frame, each long roller and each short roller are provided with a double-gear block, two adjacent long rollers are connected with each other, two adjacent short rollers are connected with each other, and each short roller is connected with the corresponding short roller through engagement of a transmission chain with the double-gear block, and the stepping motor is mounted on the frame assembly, and the output end of the stepping motor is connected with one long roller through the transmission chain.

In one embodiment, two ends of the long roller are respectively connected with two sides of the front end area and the rear end area of the mounting frame in a rotating mode.

In one embodiment, the double gear block includes a first gear and a second gear, wherein one of the first gears is connected to the other of the first gears through a transmission chain, or one of the second gears is connected to the other of the second gears through a transmission chain.

In one embodiment, the lifting assembly comprises a lifting support, a guide plate and a lifting motor assembly, wherein the bottom of the lifting support is fixedly connected with the frame assembly, the guide plate is slidably mounted on the lifting support, the supporting clamping assembly is connected with the guide plate, the lifting motor assembly is fixedly mounted on the top of the lifting support, the output end of the lifting motor assembly is connected with the guide plate through a conveying belt, and the lifting motor assembly is used for driving the guide plate to slide up and down in the lifting support.

In one embodiment, the lifting support comprises a lifting support, a lifting guide rod and a lifting motor mounting plate, wherein the lifting support is fixedly connected with the frame assembly, the lifting guide rod is vertically mounted on the lifting support, the lifting motor mounting plate is fixedly mounted on the top of the lifting guide rod, and the guide plate is in sliding connection with the lifting guide rod.

In one embodiment, the number of the lifting guide rods is two, the two lifting guide rods are respectively arranged on the lifting support, and the guide plates are respectively connected with the two lifting guide rods in a sliding manner.

In one embodiment, the supporting and clamping assembly comprises a first clamping plate, a second clamping plate, a first linear guide rail sliding block and a second linear guide rail sliding block, wherein the end part of the first clamping plate is connected to the guide plate through the first linear guide rail sliding block, the end part of the second clamping plate is connected to the guide plate through the second linear guide rail sliding block, the first clamping plate and the second clamping plate are respectively located at two ends of the guide plate, and a clamping space is reserved between the first clamping plate and the second clamping plate.

In one embodiment, the end portion of the first clamping plate is connected to the guide plate through two first linear guide rail sliding blocks which are parallel to each other and are arranged at intervals, and the end portion of the second clamping plate is connected to the guide plate through two second linear guide rail sliding blocks which are parallel to each other and are arranged at intervals.

In one embodiment, a first clamping guide block is arranged at the bottom end of one side of the first clamping plate facing the second clamping plate, a second clamping guide block is arranged at the bottom end of one side of the second clamping plate facing the first clamping plate, and the first clamping guide block and the second clamping guide block are located on the same horizontal plane.

Above-mentioned automatic feeding cylinder transportation line is equipped with the loading space through at the frame subassembly, is equipped with the feed opening with the loading space intercommunication at the cylinder subassembly for around the lifting unit and the support clamping assembly who sets up in the loading space can be with the tray jack-up to the loading opening of placing in the loading space, will be located the tray transportation to next operating position of loading opening by the cylinder subassembly again, thereby accomplish the material loading of tray. So, through setting up the top at the tray preset's advancing path's top, can make the tray according to preset's advancing path strength, accurate arrival next operation station under the effect of cylinder subassembly has avoided appearing the route deviation and has led to the circumstances that appears deviating when next operation station receives the tray, has realized the accurate material loading of tray, has improved production efficiency.

Drawings

FIG. 1 is a schematic diagram of an automated loading drum conveyor line in one embodiment;

FIG. 2 is a schematic view of the embodiment of FIG. 1 from another perspective of an automatic loading roller conveyor line;

FIG. 3 is a schematic view of the embodiment of FIG. 1 from another perspective of the automatic loading roller conveyor line;

FIG. 4 is a schematic view of the use state of the automatic feeding roller conveyor line;

FIG. 5 is a schematic view of the embodiment of FIG. 1 from another perspective of the automatic loading roller conveyor line;

FIG. 6 is an enlarged schematic view of the portion A of the embodiment of FIG. 1;

fig. 7 is a schematic partial structure of an automatic loading roller conveyor line in one embodiment.

Detailed Description

In order that the above objects, features and advantages of the utility model will be readily understood, a more particular description of the utility model will be rendered by reference to the appended drawings. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present utility model. The present utility model may be embodied in many other forms than described herein and similarly modified by those skilled in the art without departing from the spirit of the utility model, whereby the utility model is not limited to the specific embodiments disclosed below. In the description of the present utility model, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings are merely for convenience in describing the present utility model and simplifying the description, and do not indicate or imply that the device or element being referred to must have a specific orientation, be configured and operated in a specific orientation, and therefore should not be construed as limiting the present utility model.

Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include at least one such feature. In the description of the present utility model, the meaning of "plurality" means at least two, for example, two, three, etc., unless specifically defined otherwise.

In the present utility model, unless explicitly specified and limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; either directly or indirectly, through intermediaries, or both, may be in communication with each other or in interaction with each other, unless expressly defined otherwise. The specific meaning of the above terms in the present utility model can be understood by those of ordinary skill in the art according to the specific circumstances.

In the present utility model, unless expressly stated or limited otherwise, a first feature "up" or "down" a second feature may be the first and second features in direct contact, or the first and second features in indirect contact via an intervening medium. Moreover, a first feature being "above," "over" and "on" a second feature may be a first feature being directly above or obliquely above the second feature, or simply indicating that the first feature is level higher than the second feature. The first feature being "under", "below" and "beneath" the second feature may be the first feature being directly under or obliquely below the second feature, or simply indicating that the first feature is less level than the second feature.

It will be understood that when an element is referred to as being "fixed" or "disposed" on another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and the like are used herein for illustrative purposes only and are not meant to be the only embodiment.

Referring to fig. 1 to 4, the present utility model provides an automatic feeding roller conveyor line 10, the automatic feeding roller conveyor line 10 comprising: the machine frame assembly 100, the roller assembly 200, the lifting assembly 300 and the supporting clamping assembly 400 are arranged on the top of the machine frame assembly 100, the machine frame assembly 100 is provided with a feeding space 500, and the feeding space 500 is used for placing the tray 90 to be fed.

The lifting assembly 300 and the supporting and clamping assembly 400 respectively surround the feeding space 500 and are installed inside the frame assembly 100. The supporting and clamping assembly 400 is connected with the output end of the lifting assembly 300, the supporting and clamping assembly 400 is used for clamping the tray 90 in the feeding space 500, and the lifting assembly 300 is used for driving the supporting and clamping assembly 400 to move in the vertical direction so that the tray 90 leaves the feeding space 500.

The drum assembly 200 is provided with a loading opening 600 communicated with the loading space 500, the lifting assembly 300 and the supporting and clamping assembly 400 are used for jacking the tray positioned in the loading space 500 to the loading opening 600, and the drum assembly 200 is used for conveying the tray positioned in the loading opening 600 to the next operation station.

Above-mentioned automatic feeding cylinder transportation line 10 is equipped with the loading space 500 through being equipped with at frame subassembly 100, is equipped with the feed opening 600 with the loading space 500 intercommunication at the roller subassembly 200 for the lifting assembly 300 and the support clamping assembly 400 that set up around the loading space 500 can jack up the tray of placing in the loading space 500 to the feed opening 600, will be located the tray of feed opening 600 and transport to next operation station by the roller subassembly 200 again, thereby accomplish the material loading of tray. So, through setting up the material loading mouth 600 at the top of the preset travel path of tray, can make the tray according to preset travel path's strength, accurate arrival next operation station under the effect of cylinder subassembly 200 has avoided appearing the route deviation and has led to the circumstances that appears the deviation when next operation station receives the tray, has realized the accurate material loading of tray, has improved production efficiency.

As shown in fig. 1 to 6, in one embodiment, the drum assembly 200 includes a mounting frame 210, a stepping motor 220, long drums 230 and short drums 240, the mounting frame 210 is mounted at the top end of the frame assembly 100, a plurality of long drums 230 are sequentially rotatably mounted at the front end region and the rear end region of the mounting frame 210, a plurality of short drums 240 are rotatably mounted at both sides of the middle region of the mounting frame 210, a loading opening 600 is formed between the short drums 240 at both sides of the mounting frame 210, and each long drum 230 and each short drum 240 are provided with a double gear block 250. Both ends of the long roller 230 are rotatably coupled to both sides of the front and rear end regions of the mounting frame 210, respectively. The plurality of short cylinders 240 are arranged in two rows, respectively, in a central region of the mounting frame 210.

The adjacent two long rollers 230, the adjacent two short rollers 240 and the adjacent long and short rollers 230 and 240 are in transmission connection through the engagement of a transmission chain (not shown) and the double gear block 250, the stepping motor 220 is mounted on the frame assembly 100, and the output end of the stepping motor 220 is in transmission connection with one long roller 230 through the transmission chain (not shown). Since the adjacent two double gear blocks 250 are connected by a transmission chain, the stepper motor 220 can drive all the long rollers 230 and the short rollers 240 to rotate synchronously only by being in transmission connection with one double gear block 250 by the transmission chain.

In one embodiment, the dual gear block 250 includes a first gear 251 and a second gear 252, wherein one first gear 251 is connected to the other first gear 251 through a transmission chain, or one second gear 252 is connected to the other second gear 252 through a transmission chain. That is, the double gear block includes first gears and second gears which are coaxial and adjacent, wherein between two adjacent long drums or one long drum and one short drum, the first gear of one long drum is connected with the first gear of the other long drum or with the first gear of the other short drum through a transmission chain, or the second gear of one long drum is connected with the second gear of the other long drum or with the second gear of the other short drum through a transmission chain. It will be appreciated that in order to allow all of the double gear blocks 250 to rotate synchronously in one direction, such as clockwise, the adjacent two double gear blocks 250 are either connected by a transfer chain between two first gears 251 or between two second gears 252, and when the two first gears 251 between the adjacent two double gear blocks 250 are connected by a transfer chain, the adjacent third double gear block 250 can only be connected by a transfer chain under the action of the second gears 252. In this way, it is ensured that all the double gear blocks 250 can be rotated synchronously in one direction, i.e. that the long roller 230 and the short roller 240 can be rotated synchronously in one direction, thereby smoothly bringing the pallet and transporting it to the next operation station.

As shown in fig. 1 to 7, in one embodiment, the lifting assembly 300 includes a lifting bracket 310, a guide plate 320, and a lifting motor assembly 330, the bottom of the lifting bracket 310 is fixedly connected with the frame assembly 100, the guide plate 320 is slidably mounted on the lifting bracket 310, the supporting clamp assembly 400 is connected with the guide plate 320, the lifting motor assembly 330 is fixedly mounted on the top of the lifting bracket 310, the output end of the lifting motor assembly 330 is connected with the guide plate 320 through a conveyor belt, and the lifting motor assembly 330 is used for driving the guide plate 320 to slide up and down in the lifting bracket 310. In this way, the supporting and clamping assembly 400 is indirectly driven to move up and down in the feeding space 500 under the driving of the lifting motor assembly 330.

As shown in fig. 7, the lifting bracket 310 includes a lifting support 311, a lifting guide bar 312, and a lifting motor mounting plate 313, the lifting support 311 is fixedly connected to the frame assembly 100, the lifting guide bar 312 is vertically installed on the lifting support 311, the lifting motor mounting plate 313 is fixedly installed on top of the lifting guide bar 312, and the guide plate 320 is slidably connected to the lifting guide bar 312. Further, the number of the lifting guide rods 312 is two, the two lifting guide rods 312 are respectively installed on the lifting support 311, and the guide plates 320 are respectively slidably connected with the two lifting guide rods 312. In this way, the guide plate 320 can be made to run stably during the sliding.

The lift motor assembly 330 includes a servo motor 331, a synchronous rotating shaft 332 and a conveyor belt 333, the servo motor 331 is mounted and fixed on one side of the lift motor mounting plate 313, the lift motor mounting plate 313 and the lift support 311 are respectively provided with the synchronous rotating shaft 332, and an output end of the servo motor 331 is in driving connection with one end of the synchronous rotating shaft 332 on the lift motor mounting plate 313. The synchronizing spindle 332 is provided with a synchronizing wheel 3321. The synchronous rotating shaft 332 on the lifting motor mounting plate 313 is in transmission connection with the synchronous rotating shaft 332 on the lifting support 311 through a conveying belt 333, and specifically, the conveying belt 333 is sleeved on a synchronous wheel 3321 of the upper synchronous rotating shaft 332 and the lower synchronous rotating shaft 332. In order to improve efficiency, the synchronous rotating shaft 332 is provided with two synchronous wheels 3321, and the two synchronous wheels 3321 are respectively positioned at two ends of the synchronous rotating shaft 332, so that the number of the corresponding conveying belts 333 is also two. Further, a portion of the conveyor belt 333 adjacent to the guide plate 320 is connected and fixed to the guide plate 320 by a fastener. Thus, when the servo motor 331 works, the conveyor belt 333 is driven to move, and the guide plate 320 is driven to slide relative to the lifting guide rod 312, so that the lifting function is realized.

As shown in fig. 7, the supporting and clamping assembly 400 includes a first clamping plate 410, a second clamping plate 420, a first linear guide slider 430 and a second linear guide slider 440, wherein an end of the first clamping plate 410 is connected to the guide plate 320 through the first linear guide slider 430, an end of the second clamping plate 420 is connected to the guide plate 320 through the second linear guide slider 440, the first clamping plate 410 and the second clamping plate 420 are respectively positioned at two ends of the guide plate 320, and a clamping space 450 is provided between the first clamping plate 410 and the second clamping plate 420. The clamping space 450 is contained within the feeding space 500 and is part of the feeding space 500. The first clamping plate 410 and the second clamping plate 420 are used for clamping the tray 90 located in the feeding space 500 and in the clamping space 450, and the tray is separated from the feeding space 500 and transported to the next operation station through the feeding port 600 under the action of the lifting assembly 300.

As shown in fig. 7, the end of the first clamping plate 410 is connected to the guide plate 320 by two first linear guide sliders 430 disposed parallel to each other and spaced apart. That is, two first linear guide sliders 430 are disposed in parallel at one end of the guide 320, and the ends of the first clamping plate 410 are respectively connected to the two first linear guide sliders 430. The first linear guide slider 430 has a first guide rail fixed to the guide plate 320 and a first slider fixed to an end of the first clamping plate 410.

The ends of the second clamping plate 420 are connected to the guide plate 320 by two second linear guide blocks 440 disposed parallel to each other and spaced apart. That is, the other end of the guide plate 320 is provided with two second linear guide blocks 440 in parallel, and the ends of the second clamping plate 420 are respectively connected to the two second linear guide blocks 440. The second linear guide slider 440 has a second guide rail fixed to the guide plate 320 and a second slider connected and fixed to an end of the second clamping plate 420.

The first clamping plate 410 is provided with a first clamping guide block 411 toward a side bottom end of the second clamping plate 420, the second clamping plate 420 is provided with a second clamping guide block (not shown) toward a side bottom end of the first clamping plate 410, and the first clamping guide block 411 and the second clamping guide block are located at the same horizontal plane. Further, the number of the first clamping guide blocks 411 is two, and the two first clamping guide blocks 411 are respectively located at two ends of the first clamping plate 410. The number of the second clamping guide blocks is two, and the two second clamping guide blocks are respectively positioned at two ends of the second clamping plate 420. In this way, the tray 90 can be abutted against the first clamping guide block and the second clamping guide block while being clamped by the first clamping plate 410 and the second clamping plate 420, and simultaneously, in the process of clamping the tray, the two first clamping guide blocks and the two second clamping guide blocks are common, so that the first clamping plate 410 and the second clamping plate 420 are assisted to stably and efficiently lift the tray 90 to the feeding port 600.

It should be noted that, fig. 4 is a schematic view of a use state of an automatic feeding roller conveying line, fig. 4 shows that a plurality of empty trays are placed on the trolley 80, and then the plurality of trays 90 are pushed into the feeding space 500 by the trolley 80, so that the plurality of trays 90 are located right below the feeding opening 600, so that the supporting and clamping assembly 400 and the lifting assembly 300 together lift the tray located in the feeding space 500 to the feeding opening 600.

The technical features of the above-described embodiments may be arbitrarily combined, and all possible combinations of the technical features in the above-described embodiments are not described for brevity of description, however, as long as there is no contradiction between the combinations of the technical features, they should be considered as the scope of the description.

The above examples illustrate only a few embodiments of the utility model, which are described in detail and are not to be construed as limiting the scope of the utility model. It should be noted that it will be apparent to those skilled in the art that several variations and modifications can be made without departing from the spirit of the utility model, which are all within the scope of the utility model. Accordingly, the scope of protection of the present utility model is to be determined by the appended claims.

Claims

1. An automatic feeding roller conveyor line, comprising: the roller assembly is arranged at the top of the frame assembly, the frame assembly is provided with a feeding space for placing a tray to be fed,

2. The automatic feeding roller conveying line according to claim 1, wherein the roller assembly comprises a mounting frame, a stepping motor, long rollers and short rollers, the mounting frame is mounted on the top end of the frame assembly, the long rollers are sequentially rotatably mounted on the front end area and the rear end area of the mounting frame, the short rollers are rotatably mounted on two sides of the middle area of the mounting frame respectively, a feeding port is formed between the short rollers on two sides of the mounting frame, double gear blocks are arranged between each long roller and each short roller, two adjacent long rollers, two adjacent short rollers and two adjacent long rollers and the short rollers are in transmission connection through engagement of a transmission chain and the double gear blocks, the stepping motor is mounted on the frame assembly, and the output end of the stepping motor is in transmission connection with one long roller through the transmission chain.

3. The automatic feeding roller conveyor line according to claim 2, wherein both ends of the long roller are rotatably connected to both sides of the front end region and the rear end region of the mounting frame, respectively.

4. The automatic feeding roller conveyor line according to claim 2, wherein the double gear block comprises a first gear and a second gear which are coaxial and adjacent, wherein between two adjacent long rollers or one adjacent long roller and one short roller, the first gear of one long roller is connected with the first gear of the other long roller or the first gear of the other short roller through a conveying chain, or the second gear of one long roller is connected with the second gear of the other long roller or the second gear of the other short roller through a conveying chain.

5. The automatic feeding roller conveyor line according to claim 2, wherein the lifting assembly comprises a lifting bracket, a guide plate and a lifting motor assembly, wherein the bottom of the lifting bracket is fixedly connected with the frame assembly, the guide plate is slidably mounted on the lifting bracket, the supporting clamping assembly is connected with the guide plate, the lifting motor assembly is fixedly mounted on the top of the lifting bracket, the output end of the lifting motor assembly is connected with the guide plate through a conveyor belt, and the lifting motor assembly is used for driving the guide plate to slide up and down in the lifting bracket.

6. The automatic feeding roller conveyor line according to claim 5, wherein the lifting support comprises a lifting support, a lifting guide rod and a lifting motor mounting plate, wherein the lifting support is fixedly connected with the frame assembly, the lifting guide rod is vertically mounted on the lifting support, the lifting motor mounting plate is fixedly mounted on the top of the lifting guide rod, and the guide plate is slidably connected with the lifting guide rod.

7. The automatic feeding roller conveyor line according to claim 6, wherein the number of the lifting guide rods is two, the two lifting guide rods are respectively installed on the lifting support, and the guide plates are respectively connected with the two lifting guide rods in a sliding manner.

8. The automatic feeding roller conveyor line of claim 7, wherein the support clamping assembly comprises a first clamping plate, a second clamping plate, a first linear guide rail slider and a second linear guide rail slider, wherein an end portion of the first clamping plate is connected to the guide plate through the first linear guide rail slider, an end portion of the second clamping plate is connected to the guide plate through the second linear guide rail slider, the first clamping plate and the second clamping plate are respectively located at two ends of the guide plate, and a clamping space is formed between the first clamping plate and the second clamping plate.

9. The automatic loading roller conveyor line of claim 8, wherein the ends of the first clamping plates are connected to the guide plate by two first linear guide rail blocks disposed parallel to each other and spaced apart, and the ends of the second clamping plates are connected to the guide plate by two second linear guide rail blocks disposed parallel to each other and spaced apart.

10. The automatic feeding roller conveyor line of claim 9, wherein the first clamping plate is provided with a first clamping guide block toward a side bottom end of the second clamping plate, the second clamping plate is provided with a second clamping guide block toward a side bottom end of the first clamping plate, and the first clamping guide block and the second clamping guide block are located on the same horizontal plane.