阅读说明：本技术 一种移动式胶带输送机 (Movable rubber belt conveyor ) 是由 李兰华 姜立冬 高月鹏 于 2020-08-03 设计创作，主要内容包括：本发明公开了一种移动式胶带输送机,属于胶带输送机技术领域,通过启动液压驱动组件带动调节滚筒组件使其带动胶带输送带进行角度的调节,使其调节运输的高度,同时胶带输送带的尾部还可以因为胶带输送带中部的调节也改变与水平面的夹角,当要上升至比较高的高度的时候,胶带输送带的尾部与水平面的夹角减小因此提供一定的运输过程使其保持运输惯性进而到胶带输送带的顶部更加便捷而且降低滑落的问题,通过启动运动方位调节驱动组件带动顶罩旋转至合适的方位,通过启动运动驱动组件带动运动轮运动,实现带动位置的运动,通过缓冲支撑腿实现缓冲支撑的功能。(The invention discloses a movable rubber belt conveyor, belonging to the technical field of rubber belt conveyors, which drives an adjusting roller component by starting a hydraulic driving component to drive the rubber belt conveyor to adjust the angle so as to adjust the conveying height, meanwhile, the tail part of the adhesive tape conveying belt can also change the included angle with the horizontal plane due to the adjustment of the middle part of the adhesive tape conveying belt, when the belt conveyor belt is lifted to a higher height, the included angle between the tail part of the belt conveyor belt and the horizontal plane is reduced, so that a certain transportation process is provided, the belt conveyor belt keeps the transportation inertia, the belt conveyor belt is more convenient to move to the top part of the belt conveyor belt, and the problem of slippage is reduced, the top cover is driven to rotate to a proper position by the starting motion position adjusting driving assembly, the motion wheel is driven to move by the starting motion driving assembly, the motion of the driving position is realized, and the function of buffering support is realized by the buffering supporting leg.)

1. A movable rubber belt conveyor is characterized in that: including backup pad (5) and install the drive assembly is adjusted in the motion position at backup pad (5) middle part, top cap (27) is installed to the output that drive assembly is adjusted in the motion position, the top of top cap (27) with be equipped with rotatory spacing subassembly between backup pad (5), the two wall middle parts in the inboard of top cap (27) are equipped with buffering subassembly, just be equipped with sliding assembly below two wall in top cap (27) inboard, buffering subassembly and sliding assembly are connected, base (26) are installed to sliding assembly's bottom, the bottom mid-mounting of base (26) has the motion drive subassembly, just motion wheel (22) are installed to the output of motion drive subassembly, the bottom of base (26) is seted up and is made its motion wheel (22) are located motion wheel opening (25) of base (26) outside department, backup pad (5) bottom four corners department installs buffering supporting leg (4), fixed plate (2) are installed through collateral branch pillar (3) at the top of backup pad (5), just the both ends department of fixed plate (2) top one side installs second linking arm (8), the both ends department of fixed plate (2) top opposite side installs first linking arm (7), be equipped with initiative roller assembly through spacing opening (11) of second on second linking arm (8), be equipped with driven roller assembly through first spacing opening (10) on first linking arm (7), the outside cover of initiative roller assembly and driven roller assembly is equipped with sticky tape conveyer belt (16), just the inboard middle part of sticky tape conveyer belt (16) is equipped with the regulation roller assembly, the both sides at fixed plate (2) top are equipped with the drive the hydraulic drive subassembly that the regulation roller assembly carried out the regulation.

2. The conveyor belt of claim 1 wherein: the movement direction adjusting and driving assembly comprises a driving motor (6), a second rotating shaft (28) and a bearing, the bearing is installed in the middle of the inner side of the supporting plate (5), the second rotating shaft (28) penetrates through the inner side of the bearing, the driving motor (6) is installed at the top of the second rotating shaft (28), and a top cover (27) is installed at the bottom of the second rotating shaft (28);

the rotation limiting assembly comprises an annular groove (19) and an annular limiting sliding ring (20), the annular groove (19) is formed in the bottom of the supporting plate (5) and uses the center of the bottom center of the second rotating shaft (28), the annular limiting sliding ring (20) is inserted into the inner side of the annular groove (19), and the bottom of the annular limiting sliding ring (20) is fixed to the top of the top cover (27).

3. The conveyor belt of claim 1 wherein: the buffer assembly comprises a fixed ejector block (34), a first buffer spring (36) and a first buffer cylinder (35), the fixed ejector block (34) is installed in the middle of two sides of the inner wall of the top cover (27), the first buffer cylinder (35) is installed at the bottom of the fixed ejector block (34), and the first buffer spring (36) is sleeved on the outer side of the first buffer cylinder (35);

the sliding assembly comprises a sliding block (37) and a limiting sliding rail (39), the limiting sliding rail (39) is installed on two sides of the inner wall of the top cover (27) and located below the fixed top block (34), the sliding block (37) is sleeved on the outer side of the limiting sliding rail (39), and the top of the sliding block (37) is fixed to the bottom of the first buffer cylinder (35).

4. The conveyor belt of claim 1 wherein: the movement driving assembly comprises a double-end motor (21), a first rotating shaft (24) and a coupler (23), the double-end motor (21) is installed at the middle position of the bottom of the base (26), the output ends of the two sides of the double-end motor (21) are provided with the first rotating shaft (24), one end, far away from the double-end motor (21), of the first rotating shaft (24) is provided with a movement wheel (22), and the coupler (23) is installed at the bottom of the base (26) and is penetrated by the first rotating shaft (24);

and second buffer springs (38) are arranged at the bottom of the top cover (27) and the tops of two sides of the base (26).

5. The conveyor belt of claim 1 wherein: the driving roller assembly comprises a driving rotating rod (15) and a driving roller (12), two ends of the driving rotating rod (15) penetrate through the inner side of the second limiting through hole (11), the driving roller (12) is sleeved on the outer side of the driving rotating rod (15), and a transmission motor is installed at one end of the driving rotating rod (15);

driven cylinder subassembly includes driven bull stick (14) and driven cylinder (13), the both ends of driven bull stick (14) run through to the inboard department of first spacing opening (10), driven cylinder (13) cover is established the outside of driven bull stick (14).

6. The conveyor belt of claim 5 wherein: the adjusting roller assembly comprises an adjusting roller (29), an adjusting rotating rod (30) and a connecting block (31), the adjusting rotating rod (30) is located in the middle of the inner side of the adhesive tape conveying belt (16), the adjusting roller (29) is sleeved on the outer side of the adjusting rotating rod (30), and the connecting block (31) is installed at two ends of the adjusting rotating rod (30);

the outer side of the adjusting rotating rod (30) is respectively provided with a second hinged limiting arm (18) and a first hinged limiting arm (17), one end of the second hinged limiting arm (18) is arranged at the outer side of the driving rotating rod (15), and one end of the first hinged limiting arm (17) is arranged at the outer side of the driven rotating rod (14).

7. The conveyor belt of claim 6 wherein: the hydraulic drive subassembly includes pneumatic cylinder (32) and articulated seat (33), install articulated seat (33) the both sides department at fixed plate (2) top, the output installation of pneumatic cylinder (32) articulates the bottom department of connecting block (31).

8. The conveyor belt of claim 1 wherein: buffering supporting leg (4) are including U type seat (40), third buffer spring (44), second buffer cylinder (41), buffering slide bar (42) and universal wheel (43), install U type seat (40) backup pad (5) bottom four corners department, second buffer cylinder (41) are installed top department in U type seat (40), third buffer spring (44) cover is established the outside department of second buffer cylinder (41), buffering slide bar (42) are installed to the bottom of second buffer cylinder (41), universal wheel (43) are installed to the bottom of buffering slide bar (42), just be equipped with brake assembly on universal wheel (43).

9. The conveyor belt of claim 1 wherein: the both sides at fixed plate (2) top are close to second linking arm (8) department installs dead lever (9), just side anti-falling plate (1) is installed at the top of dead lever (9), side anti-falling plate (1) is located the both sides department of second linking arm (8).

Technical Field

The invention relates to an adhesive tape conveyor, in particular to a movable adhesive tape conveyor, and belongs to the technical field of adhesive tape conveyors.

Background

The history of the conveyor is long, and the ancient Chinese high-rotary-drum vehicle and the water-lifting overturning vehicle are rudiments of a modern bucket elevator and a scraper conveyor.

The modern conveyor system has higher requirements on dust prevention, and therefore, a water spraying and dust collecting device is arranged at each switching position, a wind shield or a wind shield is arranged along the belt conveyor, the system consists of a single machine, and for an operator and a repairer working in the whole system, the operator needs to stand on the single machine for pipe distribution and know the mutual relation among the systems, the single machine consists of a plurality of parts, and the safe operation of the equipment can be ensured only by well performing the daily maintenance and the maintenance of each part to ensure that the part is in a good working state.

Disclosure of Invention

The invention aims to provide a movable belt conveyor, which is characterized in that an article to be conveyed is placed at the top of a belt conveyor, a transmission motor is started to drive a driving roller assembly to rotate, the belt conveyor is driven to move by the driving roller assembly, a driven roller assembly is driven by the belt conveyor to realize the function of circulating transmission, a hydraulic driving assembly is started to drive an adjusting roller assembly to drive the belt conveyor to adjust the angle, so that the conveying height is adjusted, meanwhile, the tail part of the belt conveyor can also change the included angle with the horizontal plane due to the adjustment of the middle part of the belt conveyor, when the belt conveyor is lifted to a higher height, the included angle between the tail part of the belt conveyor and the horizontal plane is reduced, so that a certain conveying process is provided to keep the conveying inertia and the top of the belt conveyor is more convenient and the problem of falling is reduced, the top cover is driven to rotate to a proper position by the starting motion position adjusting driving assembly, the motion wheel is driven to move by the starting motion driving assembly, the motion of the driving position is realized, and the function of buffering support is realized by the buffering supporting leg.

The purpose of the invention can be achieved by adopting the following technical scheme:

a movable rubber belt conveyor comprises a supporting plate and a movement direction adjusting driving assembly arranged in the middle of the supporting plate, wherein a top cover is arranged at the output end of the movement direction adjusting driving assembly, a rotation limiting assembly is arranged between the top of the top cover and the supporting plate, a buffering assembly is arranged in the middle of the two inner walls of the top cover, a sliding assembly is arranged below the two inner walls of the top cover, the buffering assembly is connected with the sliding assembly, a base is arranged at the bottom of the sliding assembly, a movement driving assembly is arranged in the middle of the bottom of the base, a movement wheel is arranged at the output end of the movement driving assembly, a movement wheel through hole is formed in the bottom of the base, the movement wheel is located at the outer side of the base, buffering supporting legs are arranged at the four corners of the bottom of the supporting plate, and a fixed plate is arranged at, and the two ends of one side of the top of the fixing plate are provided with second connecting arms, the two ends of the other side of the top of the fixing plate are provided with first connecting arms, the second connecting arms are provided with driving roller assemblies through second limiting openings, the first connecting arms are provided with driven roller assemblies through first limiting openings, the outer sides of the driving roller assemblies and the driven roller assemblies are sleeved with adhesive tape conveying belts, the middle parts of the inner sides of the adhesive tape conveying belts are provided with adjusting roller assemblies, and the two sides of the top of the fixing plate are provided with drives for adjusting hydraulic driving assemblies for adjusting the adjusting roller assemblies.

Preferably, the movement direction adjusting and driving assembly comprises a driving motor, a second rotating shaft and a bearing, the bearing is installed in the middle of the inner side of the supporting plate, the second rotating shaft penetrates through the inner side of the bearing, the driving motor is installed at the top of the second rotating shaft, and a top cover is installed at the bottom of the second rotating shaft;

the rotation limiting assembly comprises an annular groove and an annular limiting sliding ring, the annular groove is formed in the bottom of the supporting plate and corresponds to the center of the bottom of the second rotating shaft, the annular limiting sliding ring is inserted into the inner side of the annular groove, and the bottom of the annular limiting sliding ring is fixed to the top of the top cover.

Preferably, the buffering assembly comprises a fixed ejector block, a first buffering spring and a first buffering cylinder, the fixed ejector block is installed in the middle of two sides of the inner wall of the top cover, the first buffering cylinder is installed at the bottom of the fixed ejector block, and the first buffering spring is sleeved on the outer side of the first buffering cylinder;

the sliding assembly comprises a sliding block and a limiting sliding rail, the limiting sliding rail is mounted on two sides of the inner wall of the top cover and located below the fixed jacking block, the sliding block is sleeved on the outer side of the limiting sliding rail, and the top of the sliding block is fixed with the bottom of the first buffer cylinder.

Preferably, the motion driving assembly comprises a double-end motor, a first rotating shaft and a coupler, the double-end motor is installed in the middle of the bottom of the base, the output ends of the two sides of the double-end motor are both provided with the first rotating shaft, one end, far away from the double-end motor, of the first rotating shaft is provided with a motion wheel, and the coupler is installed at the bottom of the base and is penetrated by the first rotating shaft;

and second buffer springs are arranged at the bottom of the top cover and the tops of the two sides of the base.

Preferably, the driving roller assembly comprises a driving rotating rod and a driving roller, two ends of the driving rotating rod penetrate through the inner side of the second limiting through hole, the driving roller is sleeved on the outer side of the driving rotating rod, and a transmission motor is mounted at one end of the driving rotating rod;

the driven roller assembly comprises a driven rotating rod and a driven roller, two ends of the driven rotating rod penetrate through the inner side of the first limiting through hole, and the driven roller is sleeved on the outer side of the driven rotating rod.

Preferably, the adjusting roller assembly comprises an adjusting roller, an adjusting rotating rod and a connecting block, the adjusting rotating rod is located in the middle of the inner side of the adhesive tape conveying belt, the adjusting roller is sleeved on the outer side of the adjusting rotating rod, and the connecting block is installed at two ends of the adjusting rotating rod;

the outer side of the adjusting rotating rod is respectively provided with a second hinged limiting arm and a first hinged limiting arm, one end of the second hinged limiting arm is arranged at the outer side of the driving rotating rod, and one end of the first hinged limiting arm is arranged at the outer side of the driven rotating rod.

Preferably, the hydraulic drive assembly comprises a hydraulic cylinder and a hinged seat, the hinged seat is installed at two sides of the top of the fixed plate, and the output end of the hydraulic cylinder is installed and hinged at the bottom of the connecting block.

Preferably, the buffering supporting leg includes U type seat, third buffer spring, second buffer cylinder, buffering slide bar and universal wheel, U type seat is installed backup pad bottom four corners department, the second buffer cylinder is installed top department in the U type seat, the third buffer spring cover is established the outside department of second buffer cylinder, the buffering slide bar is installed to the bottom of second buffer cylinder, the universal wheel is installed to the bottom of buffering slide bar, just be equipped with braking component on the universal wheel.

Preferably, the both sides at fixed plate top are close to second linking arm department installs the dead lever, just the side anti-falling board is installed at the top of dead lever, the side anti-falling board is located the both sides department of second linking arm.

The invention has the beneficial technical effects that:

the invention provides a movable belt conveyor, which is characterized in that an article to be conveyed is placed at the top of a belt conveyor, a transmission motor is started to drive a driving roller assembly to rotate, the belt conveyor is driven to move by the driving roller assembly, a driven roller assembly is driven by the belt conveyor to realize the function of circulating transmission, a hydraulic driving assembly is started to drive an adjusting roller assembly to drive the belt conveyor to adjust the angle, so that the conveying height is adjusted, meanwhile, the tail part of the belt conveyor can also change the included angle with the horizontal plane due to the adjustment of the middle part of the belt conveyor, when the belt conveyor is lifted to a higher height, the included angle between the tail part of the belt conveyor and the horizontal plane is reduced, so that a certain conveying process is provided, the conveying inertia is kept, and the problem that the belt conveyor is more convenient to reach the top of the belt, the top cover is driven to rotate to a proper position by the starting motion position adjusting driving assembly, the motion wheel is driven to move by the starting motion driving assembly, the motion of the driving position is realized, and the function of buffering support is realized by the buffering supporting leg.

Drawings

FIG. 1 is a side cross-sectional view of a preferred embodiment of a mobile belt conveyor according to the present invention;

fig. 2 is a sectional view showing the structure of a moving frame of a preferred embodiment of a mobile belt conveyor according to the present invention;

FIG. 3 is a sectional view of a buffering support leg structure of a preferred embodiment of a mobile belt conveyor according to the present invention;

FIG. 4 is an enlarged view of a preferred embodiment of a mobile belt conveyor according to the present invention at a;

fig. 5 is an enlarged view of a structure at b of a preferred embodiment of a mobile belt conveyor according to the present invention.

In the figure: 1-side anti-drop plate, 2-fixed plate, 3-side support column, 4-buffer support leg, 5-support plate, 6-driving motor, 7-first connecting arm, 8-second connecting arm, 9-fixed rod, 10-first limiting port, 11-second limiting port, 12-driving roller, 13-driven roller, 14-driven rotating rod, 15-driving rotating rod, 16-adhesive tape conveyer belt, 17-first hinged limiting arm, 18-second hinged limiting arm, 19-annular groove, 20-annular limiting slip ring, 21-double-head motor, 22-moving wheel, 23-coupler, 24-first rotating shaft, 25-moving wheel port, 26-base, 27-top cover, 28-second rotating shaft, 29-an adjusting roller, 30-an adjusting rotating rod, 31-a connecting block, 32-a hydraulic cylinder, 33-a hinged seat, 34-a fixed top block, 35-a first buffer cylinder, 36-a first buffer spring, 37-a sliding block, 38-a second buffer spring, 39-a limiting sliding rail, 40-a U-shaped seat, 41-a second buffer cylinder, 42-a buffer sliding rod, 43-a universal wheel and 44-a third buffer spring.

Detailed Description

In order to make the technical solutions of the present invention more clear and definite for those skilled in the art, the present invention is further described in detail below with reference to the examples and the accompanying drawings, but the embodiments of the present invention are not limited thereto.

As shown in fig. 1-5, the present embodiment provides a mobile belt conveyor, which includes a supporting plate 5 and a motion direction adjusting driving assembly installed in the middle of the supporting plate 5, a top cover 27 is installed at the output end of the motion direction adjusting driving assembly, a rotation limiting assembly is installed between the top of the top cover 27 and the supporting plate 5, a buffering assembly is installed in the middle of two inner walls of the top cover 27, a sliding assembly is installed below two inner walls of the top cover 27, the buffering assembly is connected to the sliding assembly, a base 26 is installed at the bottom of the sliding assembly, a motion driving assembly is installed in the middle of the bottom of the base 26, a motion wheel 22 is installed at the output end of the motion driving assembly, a motion wheel through hole 25 is formed in the bottom of the base 26 to enable the motion wheel 22 to be located at the outer side of the base 26, buffering supporting legs 4 are installed at four corners of the bottom, and the both ends department at 2 top one sides of fixed plate installs second linking arm 8, first linking arm 7 is installed at the both ends department of 2 top opposite sides of fixed plate, be equipped with the driving roller subassembly through the spacing opening 11 of second on the second linking arm 8, be equipped with the driven roller subassembly through first spacing opening 10 on the first linking arm 7, the outside cover of driving roller subassembly and driven roller subassembly is equipped with adhesive tape conveyor belt 16, and adhesive tape conveyor belt 16's inboard middle part is equipped with the regulation roller subassembly, the both sides at 2 top of fixed plate are equipped with the hydraulic drive subassembly that the drive regulation roller subassembly carried out the regulation.

The article to be transported is placed at the top of the belt conveyor 16, the driving roller assembly is driven to rotate by starting the transmission motor, the belt conveyor 16 is driven to move by the driving roller assembly, the driven roller assembly is driven by the belt conveyor 16 to realize the function of circular transmission, the adjusting roller assembly is driven by starting the hydraulic driving assembly to drive the belt conveyor 16 to adjust the angle, so that the conveying height is adjusted, meanwhile, the tail part of the belt conveyor 16 can also change the included angle with the horizontal plane due to the adjustment of the middle part of the belt conveyor 16, when the belt conveyor is lifted to a higher height, the included angle between the tail part of the belt conveyor 16 and the horizontal plane is reduced, so that a certain transportation process is provided, the belt conveyor keeps the transportation inertia and further the top of the belt conveyor 16 is more convenient and the problem of falling is solved, and the top cover 27 is driven to rotate to a proper direction by starting the, the motion driving assembly is started to drive the motion wheel 22 to move, so that the motion of the driving position is realized, and the function of buffering support is realized through the buffering support leg 4.

In this embodiment, the movement direction adjustment driving assembly includes a driving motor 6, a second rotating shaft 28 and a bearing, the bearing is installed at the middle part of the inner side of the supporting plate 5, the second rotating shaft 28 penetrates through the inner side of the bearing, the driving motor 6 is installed at the top of the second rotating shaft 28, and the top cover 27 is installed at the bottom of the second rotating shaft 28; the rotation limiting assembly comprises an annular groove 19 and an annular limiting sliding ring 20, the annular groove 19 is formed in the bottom of the supporting plate 5 and uses the center of the bottom center of the second rotating shaft 28, the annular limiting sliding ring 20 is inserted into the inner side of the annular groove 19, and the bottom of the annular limiting sliding ring 20 is fixed at the top of the top cover 27.

The starting motor 6 is started to drive the second rotating shaft 28 to rotate, and the top cover 27 is driven to rotate through the second rotating shaft 28, so that the whole body is driven to rotate.

In this embodiment, the buffer assembly includes a fixed top block 34, a first buffer spring 36 and a first buffer cylinder 35, the fixed top block 34 is installed in the middle of two sides of the inner wall of the top cover 27, the first buffer cylinder 35 is installed at the bottom of the fixed top block 34, and the first buffer spring 36 is sleeved outside the first buffer cylinder 35; the sliding assembly comprises a sliding block 37 and a limiting sliding rail 39, the limiting sliding rail 39 is arranged on two sides of the inner wall of the top cover 27 and located below the fixed top block 34, the sliding block 37 is sleeved on the outer side of the limiting sliding rail 39, and the top of the sliding block 37 is fixed with the bottom of the first buffer cylinder 35.

In this embodiment, the motion driving assembly includes a double-headed motor 21, a first rotating shaft 24 and a coupling 23, the double-headed motor 21 is installed at the middle position of the bottom of the base 26, the output ends of both sides of the double-headed motor 21 are both installed with the first rotating shaft 24, one end of the first rotating shaft 24 far away from the double-headed motor 21 is installed with the motion wheel 22, and the coupling 23 is installed at the bottom of the base 26 and penetrated by the first rotating shaft 24; the bottom of the top cover 27 and the top of the two sides of the base 26 are provided with second buffer springs 38.

In this embodiment, the driving roller assembly includes a driving rotating rod 15 and a driving roller 12, two ends of the driving rotating rod 15 penetrate to the inner side of the second limiting through hole 11, the driving roller 12 is sleeved on the outer side of the driving rotating rod 15, and one end of the driving rotating rod 15 is provided with a transmission motor; driven cylinder subassembly includes driven bull stick 14 and driven cylinder 13, and the inboard department of first spacing opening 10 is run through to the both ends of driven bull stick 14, and driven cylinder 13 cover is established in the outside of driven bull stick 14.

In this embodiment, the adjusting roller assembly includes an adjusting roller 29, an adjusting rotating rod 30 and a connecting block 31, the adjusting rotating rod 30 is located at the middle of the inner side of the adhesive tape conveying belt 16, the adjusting roller 29 is sleeved on the outer side of the adjusting rotating rod 30, and the connecting blocks 31 are installed at two ends of the adjusting rotating rod 30; the outer side of the adjusting rotating rod 30 is respectively provided with a second hinge limiting arm 18 and a first hinge limiting arm 17, one end of the second hinge limiting arm 18 is arranged at the outer side of the driving rotating rod 15, and one end of the first hinge limiting arm 17 is arranged at the outer side of the driven rotating rod 14.

In this embodiment, the hydraulic driving assembly includes a hydraulic cylinder 32 and a hinge seat 33, the hinge seat 33 is installed at both sides of the top of the fixed plate 2, and the output end of the hydraulic cylinder 32 is installed to be hinged at the bottom of the connection block 31.

In this embodiment, the buffering support leg 4 includes a U-shaped seat 40, a third buffer spring 44, a second buffer cylinder 41, a buffer slide bar 42 and a universal wheel 43, the U-shaped seat 40 is installed at four corners of the bottom of the support plate 5, the second buffer cylinder 41 is installed at the top of the U-shaped seat 40, the third buffer spring 44 is sleeved at the outer side of the second buffer cylinder 41, the buffer slide bar 42 is installed at the bottom of the second buffer cylinder 41, the universal wheel 43 is installed at the bottom of the buffer slide bar 42, and a braking component is arranged on the universal wheel 43.

In this embodiment, the fixing rod 9 is installed at the position close to the second connecting arm 8 on the two sides of the top of the fixing plate 2, the side anti-falling plate 1 is installed at the top of the fixing rod 9, and the side anti-falling plate 1 is located at the two sides of the second connecting arm 8.

The above are only further embodiments of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art can substitute or change the technical solution of the present invention and its concept within the scope of the present invention.