CN113995148B

CN113995148B - Automatic cutting equipment of rotatory formula chinese chestnut of cutting

Info

Publication number: CN113995148B
Application number: CN202111434946.5A
Authority: CN
Inventors: 白效鹏; 赵苏骁; 徐道春
Original assignee: Beijing Forestry University
Current assignee: Beijing Forestry University
Priority date: 2021-11-29
Filing date: 2021-11-29
Publication date: 2025-07-25
Anticipated expiration: 2041-11-29
Also published as: CN113995148A

Abstract

The invention relates to the technical field of forest fruit processing, in particular to a Chinese chestnut cutting treatment technology, and discloses a rotary cutting type Chinese chestnut automatic cutting device. The automatic Chinese chestnut cutting equipment comprises a frame type carrier, a power input device on one side of the frame, a moving and parking device on the bottom of the frame, a feeding device on the top of the frame, a turning and conveying device below the feeding device, a cutting device on the front part of the conveying device and a collecting device connected with a box body on the front part of the cutting device. The feeding device can send the Chinese chestnut to be processed out of the square hopper above in batches and rows, and slides to the overturning and conveying device along with the dustpan-shaped slide way, the overturning and conveying device can overturn the Chinese chestnut into a plurality of rows and then enter the corresponding cutting devices of the rows, the cutting devices can profile the convex surfaces of the Chinese chestnut and perform equal-depth cutting treatment, and each group of processed Chinese chestnut enters the collecting device to be collected uniformly. The invention replaces manual work of dividing and cutting the Chinese chestnut, thereby greatly saving manpower and reducing working risk.

Description

Automatic cutting equipment of rotatory formula chinese chestnut of cutting

Technical Field

The invention relates to the technical field of forest fruit processing machinery, in particular to a Chinese chestnut cutting treatment technology, and specifically relates to a rotary cutting type automatic Chinese chestnut cutting device.

Background

Chestnut is native in China, is one of the earliest famous nuts eaten by China, and has annual output at the top of the world. Chinese chestnut is good in quality and rich in nutrition, and the fried chestnut is fine in meat quality, sweet and palatable, is called as sugar-fried chestnut, is a famous traditional snack with local flavor in Jingjin, is also a delicious food with long-lasting tradition, and is deeply favored by people. Before the chestnut is fried, a notch is usually required to be formed in the chestnut shell so as to be tasty during the frying, and the notch of the chestnut shell can be split along with the temperature rise during the frying, so that people can eat the chestnut conveniently by peeling.

At present, the mode of opening on the chestnut shell is mainly to cut the opening by a manual handheld cutter, the raw chestnut shell is hard, the difficulty of manually cutting the chestnut shell is high, the danger coefficient is large, the production efficiency is low during mass processing, and safety accidents are easy to cause.

In the prior art, there is a chestnut slitting machine, the application number is 201910060602.9, and the application date is 20190122. The chestnut slitting machine is characterized in that the chestnut enters an independent trough from a conveying mechanism and moves to an opening device along with the trough, the opening device mainly comprises a connecting rod mechanism, a transmission handle is pulled by manpower to operate the mechanism to drive a cutter to vertically extrude the chestnut in a processing trough one by one, and the opening operation is completed by observing the opening depth by naked eyes.

The chestnut cutting machine needs to process by means of manual operation equipment and naked eye observation, the production efficiency is low, the chestnut cutting machine is difficult to popularize and use widely, and the chestnut cutting machine can selectively cut the convex surface of the chestnut when manually cutting the chestnut through field investigation, so that the purposes of ensuring the quality and facilitating the stir-frying and cracking of the chestnut are achieved, the chestnut cutting machine in the prior art cannot distinguish which face of the chestnut is upwards cut in a trough, and the extrusion type cutting mode can possibly lead to the damage of the chestnut, so that the quality of the processed chestnut cannot be ensured.

In summary, the prior art has obvious defects in practical application. Therefore, there is a need to develop a device that can automatically cut large quantities of chestnut and ensure the quality of chestnut after the cutting process.

Disclosure of Invention

The invention aims to solve the technical problems in the prior art, and provides a rotary slicing type automatic Chinese chestnut cutting device which can be suitable for carrying out high-efficiency cutting treatment on large-batch Chinese chestnut and can ensure the quality of processed Chinese chestnut.

In order to achieve the above purpose, the invention adopts the following technical scheme:

The automatic cutting equipment for the rotary cutting type Chinese chestnut comprises a frame type carrier, a power input device on one side of the frame, a moving and parking device on the bottom of the frame, a feeding device on the top of the frame, a turning and conveying device below the feeding device, a cutting device on the front part of the conveying device and a collecting device connected with a box body on the front part of the cutting device.

The automatic incision treatment process of the equipment starts from the feeding device, passes through the overturning and conveying device and the incision device, and enters the collecting device to finish.

The feeding device comprises a feeding device body, wherein the feeding device body is composed of a special groove-shaped conveying belt, a square hopper is arranged above the feeding device body, the bottom of the square hopper is open and is not connected with the conveying belt, a chestnut to be processed moves forwards along with the conveying belt after entering the hopper, the chestnut falls into a single-row long groove on the conveying belt to leave the hopper along with the conveying belt after meeting the blocking of the front wall of the square hopper, the single-row long groove drives the chestnut to be processed to the front end of the conveying belt, the chestnut naturally falls into a dustpan-shaped slideway below the front end of the conveying belt, and the chestnut falls onto a turnover and conveying device below at a certain relative speed along with the slideway.

The turning and conveying device is composed of a belt type conveying belt, after the chestnut to be processed slides onto the moving conveying belt at a certain relative speed, friction force generated between the chestnut shell and the conveying belt can form a turning moment on the gravity center of the chestnut, so that the chestnut turns to be convex upward and moves forwards along with the conveying belt, and the chestnut to be processed on the conveying belt sequentially enters all groups of notch devices in a plurality of rows after passing through guide grooves connected to a frame and is subjected to notch treatment.

The Chinese chestnut notch device is characterized by further comprising a notch device, wherein the notch device is formed by a front group of press pulleys and a rear group of press pulleys, each group of press pulleys consists of two press pulleys which are symmetrical left and right and are separated by a certain distance, the positions of the press pulleys of the rear group are fixed and slightly higher than those of the front group, a chestnut to be processed is transported below the press pulleys of the rear group and continuously moves forwards to the press pulleys of the front group under the clamping of the press pulleys and the conveyor belts, a knife rest is clamped between the left press pulleys and the right press pulleys of the front group and is fixedly connected with a wheel shaft, the wheel shaft is limited on a frame through a spring, a saw-tooth circular blade is arranged on the knife rest, a gear on a blade rotating shaft is meshed with an inner side gear ring of the press pulleys through a reversing gear on the knife rest, the circular blade is reversed, the circular blade stretches out by about 1mm from a gap between the left press pulleys and the right press pulleys, in addition, the front group of press pulleys and the knife rest fixedly connected with the wheel shaft can float up and down under the action of the spring, the purpose of profiling the chestnut and carrying out equal-depth notch treatment on the wheel shaft is achieved, and the cut-back chestnut is put into a collecting device.

The collecting device comprises an integrated chute connected with the frame and positioned below each group of the notch devices, each group of Chinese chestnut is naturally dropped onto the chute to slide to a unified outlet after being processed by the notch devices, and in addition, the Chinese chestnut can be counted one by one through an infrared sensor arranged in the process that the Chinese chestnut leaves the notch devices and drops onto the chute, so that the Chinese chestnut is conveniently and uniformly collected in subsequent batch quantities.

In addition, the power input device at one side of the frame consists of a motor, a speed reducer, a reversing gear and a synchronous belt, wherein the motor is connected with the speed reducer and then transmits power to a driving shaft of a conveying belt in the overturning and conveying device, the driving shaft of the conveying belt is connected with a rear belt pressing wheel shaft in the cutting device through the synchronous belt after being connected with the reversing gear, so that the upper side of the belt of the conveying belt and the lower side of the belt pressing wheel move in the same direction at the same speed, the belt clamping chestnut is ensured to be more stable when the cutting treatment is carried out, and meanwhile, a driven shaft of the conveying belt is connected with the driving shaft of the conveying belt through a speed matching belt, and the movement of the conveying belt and the conveying belt in a certain speed relation is ensured.

In addition, the frame bottom moving and parking device main body is composed of universal wheels, a knob is arranged at the wheel side and connected with a turbine worm mechanism and a spiral lifting rod which are arranged in the wheel side, the inner parking rod can be controlled to extend out of an opening at the wheel bottom and support on the ground, and the machine can be fixed on uneven ground horizontally and work normally.

Compared with the prior art, the invention has the beneficial effects that:

(1) The chestnut cutting equipment provided by the invention is simple and convenient to operate, and only needs to put batch of chestnut to be processed into the hopper of the feeding device, the chestnut can be automatically processed by the equipment and transported to the collecting device for unified collection, thereby completely realizing automation of chestnut cutting, greatly saving manpower and reducing working risk.

(2) According to the chestnut cutting equipment provided by the invention, the overturning and conveying device and the cutting device are designed, so that the chestnut can be overturned to the convex surface to be upwards, and the convex surface is subjected to equal-depth cutting treatment, so that the quality of the chestnut subjected to the cutting treatment is ensured, and the chestnut cutting equipment is more popular with users.

(3) According to the chestnut cutting device, the cutter blade of the cutting device is designed, so that the cutter blade and the pinch roller are reversed, the chestnut shell is easier to cut and open in a rotating mode, the chestnut shell is prevented from being clamped on the cutter blade, and the smoothness of the cutting operation of the device is improved.

(4) According to the chestnut cutting equipment provided by the invention, a plurality of groups of cutting devices can be additionally arranged according to actual use conditions, so that the simultaneous processing of the plurality of groups of cutting devices can be realized, a large number of chestnuts can be processed according to different requirements, and the working efficiency is improved.

(5) According to the chestnut cutting equipment provided by the invention, the infrared sensor can be additionally arranged at the collecting device to count processed finished products one by one, so that the processing rate can be conveniently analyzed and adjusted, and the processed chestnut can be collected in batches according to quantity, and the intellectualization of processing treatment is realized.

(6) The chestnut cutting equipment provided by the invention designs the bottom moving and parking device, facilitates transportation and movement of the equipment by arranging the universal wheels, ensures that the equipment can still keep horizontal fixing on uneven ground for normal operation by arranging the telescopic parking rod, and improves the adaptability of the equipment to different environments.

Drawings

Fig. 1 is an overall isometric view of the present invention.

Fig. 2 is a full cross-sectional view of the invention in front view.

Fig. 3 is a left side view of the present invention.

Fig. 4 is a partial isometric view of an slitting device according to this invention.

Fig. 5 is a partial enlarged view of the power input device in the present invention.

Fig. 6 is a partial isometric view of a mobile and stationary device of the present invention.

The reference numerals are as follows:

1 frame type carrier, 2-1 square hopper, 2-2 groove type conveying belt, 2-3 dustpan type slideway, 2-4 conveying belt driving shaft, 3-1 conveying belt, 3-2 conveying belt driven shaft, 3-3 guiding groove, 3-4 conveying belt driving shaft, 4-1 pinch roller belt, 4-2 front pinch roller, 4-3 front pinch roller shaft, 4-4 rear pinch roller shaft, 4-5 rear pinch roller shaft, 4-6 spring, 4-7 sawtooth edge round blade, 4-8 blade reversing gear, 4-9 blade gear shaft, 4-10 knife rest, 4-11 knife rest fixing pin, 5-1 chute, 5-2 infrared sensor, 6-1 motor, 6-2 bevel gear reducer, 6-3 pinch roller reversing gear, 6-4 rear wheel shaft gear, 6-5 synchronous wheel belt, 6-6 speed matching belt, 7-1 wheel body, 7-2, 7-3 rotating shaft, 7-4 worm, 7-5 knob, 7-6 rotating parking rod, 7-7 universal wheel inner sliding sleeve, 7-8 universal sliding sleeve and 7-9 universal wheel shaft.

Detailed Description

For the purpose of making apparent the objects, technical solutions and advantages of the present invention, the present invention will be further described in detail with reference to the accompanying drawings and examples, it being understood that the specific examples described herein are only illustrative of one preferred embodiment of the present invention and are not intended to limit the present invention.

Referring to fig. 1, the invention provides automatic cutting equipment for rotary cutting type Chinese chestnut, which comprises a frame type carrier 1, a feeding device 2 positioned on the frame type carrier 1, a turning and conveying device 3 positioned below the feeding device 2, a cutting device 4 positioned at the front part of the conveying device 3, a collecting device 5 positioned below the cutting device 4, a power input device 6 positioned at one side of the frame type carrier 1, and a moving and stopping device 7 positioned at the bottom of the frame type carrier 1.

Taking a specific working process of the equipment of the invention as an example, the working principle of the equipment of the invention is as follows:

When the Chinese chestnut to be processed in batches is required to be subjected to incision treatment, the Chinese chestnut to be processed is placed in a square hopper 2-1, a groove-shaped conveying belt 2-2 (shown in figure 2) is arranged below the opening at the bottom of the square hopper 2-1, the Chinese chestnut to be processed moves forwards along with the groove-shaped conveying belt 2-2 after entering the square hopper 2-1, falls into a groove on the groove-shaped conveying belt 2-2 and leaves from the bottom of the square hopper 2-1 along with the movement of the groove after meeting the blocking of the front wall of the square hopper 2-1, and the Chinese chestnut to be processed naturally falls onto a dustpan-shaped slideway 2-3 below the groove-shaped conveying belt after moving to the front end of the groove-shaped conveying belt 2-2, so that the Chinese chestnut slides down to a turnover and conveying device 3 at a certain speed.

Furthermore, when the chestnut to be processed slides onto the conveyor belt 3-1 (as shown in figure 2), because of a certain relative speed of the contact surface, the gravity center of the chestnut is formed into overturning moment by the friction force generated by the contact surface, so that the chestnut is overturned to be convex upward, and stably moves forward along with the conveyor belt 3-1, and when the chestnut passes through the guide groove 3-3, the chestnut is arranged into a plurality of rows (3 rows in the figure) under the guide of the guide groove 3-3 and enters the corresponding notch devices 4 of each group (3 groups in the figure) respectively.

Further, after the chestnut to be processed reaches the notch device 4, the chestnut passes through the lower parts of the left and right rear pinch rollers 4-4 and the lower parts of the left and right front pinch rollers 4-2 (see figure 2), the rear pinch rollers 4-4 are connected with the rear pinch roller shafts 4-5, the front pinch rollers 4-2 are connected with the front pinch roller shafts 4-3 through the pinch roller belts 4-1, the rear pinch rollers 4-4 drive the front pinch rollers 4-2 to rotate, the positions of the rear pinch rollers 4-4 are slightly higher than those of the front pinch rollers 4-2, so that the chestnut to be processed can enter from below without obstruction, the rear gap of the chestnut to be processed enters the rear pinch rollers 4-4 gradually becomes narrower, and continuously moves forwards under the clamping action of the pinch roller belts 4-1 and the conveyor belt 3-1, and the chestnut is subjected to notch processing under the front pinch rollers 4-2.

Further, referring to fig. 3 and 4, the left and right front pinch rollers 4-2 are symmetrically distributed, cutters (4-7 to 4-11) are arranged in the middle of the front pinch rollers, the circular blades 4-7 with sawtooth edges extend out of a gap between the two pinch rollers (about 1 mm) and are connected to the cutter rest 4-10 through the blade gear shafts 4-9, the blade gear shafts 4-9 are meshed with the gear rings on the inner sides of the front pinch rollers 4-2 through the blade reversing gears 4-8 on the cutter rest 4-10, the front pinch rollers 4-2 can realize driven reversing of the circular blades 4-7 under the driving rotation, at the moment, the chestnut to be processed passes under the front pinch rollers 4-2 under the clamping of the two belts (3-1, 4-1), the circular blades 4-7 with sawtooth edges opposite to the rotation direction of the front pinch rollers 4-2 can be cut in a rotating way through the chestnut shell, the cutter rest 4-10 is preferably fixedly connected to the front pinch roller shafts 4-3 through the cutter rest fixing pins 4-11, the front pinch rollers 4-3 are limited on the frame 1 through springs 4-6, the front pinch rollers 4-7 can be cut down by the floating rollers, the depth of the front pinch rollers 4-2 can be cut down through the front pinch rollers, and the front pinch rollers 4-pass through the front pinch rollers, and the front pinch rollers 4-pass through the front pinch rollers, and can realize the rolling blades, and can realize rolling and cut-cut by the front pinch roller.

Furthermore, the Chinese chestnut is cut and naturally falls into the collecting device 5 (see fig. 1 and 2), the collecting device 5 is composed of the chute 5-1 connected with the frame 1, the Chinese chestnut is processed by each group of cutting devices 4 and falls onto the chute 5-1 and falls to a unified outlet along with the chute 5-1 to enter an external container (not shown in the figure) for unified collection, preferably, the infrared sensor 5-2 is arranged below each group of cutting devices 4, the processed Chinese chestnut can be counted one by one, and the unified collection of batch quantity of the whole processed Chinese chestnut can be realized.

In addition, the power input device 6 arranged on one side of the frame 1 can provide power for the working process of the equipment (see fig. 3 and 5), the power input device 6 is composed of a motor 6-1, the motor 6-1 transmits power to the driving shaft 3-4 of the conveyor belt through a bevel gear reducer 6-2, meanwhile, the driving shaft 3-4 of the conveyor belt transmits power to the rear belt wheel shaft 4-5 through a belt pulley reversing gear 6-3 by a synchronous pulley belt 6-5, the upper side of the belt 3-1 and the lower side of the belt pulley belt 4-1 move at the same direction and the same speed, so that the situation that the two side belts clamp Chinese chestnut to perform incision treatment is ensured, and in addition, the driven shaft 3-2 of the conveyor belt and the driving shaft 2-4 of the conveyor belt are connected through a speed matching belt 6-6, so that the groove-shaped conveyor belt 2-2 and the belt 3-1 move at a certain speed.

In order to facilitate the movement and stable placement of the device on the poor ground and ensure the normal operation of the device under various use scenes, a movement and parking device 7 (see fig. 1 and 6) is arranged, the movement and parking device is composed of a wheel body 7-1, one end of the wheel body 7-1 is provided with universal wheel devices (7-7 to 7-10), the universal wheel 7-10 is connected with an external universal wheel sliding sleeve 7-8 through a wheel shaft 7-9, the universal wheel external sliding sleeve 7-8 and the internal universal wheel sliding sleeve 7-7 can realize the omnibearing rotation of the universal wheel 7-10 in the horizontal direction, in addition, a knob 7-5 is arranged outside the wheel body 7-1 and connected with an internal worm 7-4, the worm 7-4 is connected with a rotating shaft 7-3 through a worm wheel 7-2, and the rotating shaft 7-3 drives a rotating parking rod 7-6 to move through a chute, so that the rotating parking rod is supported on the ground in a rotating lifting manner and self-locking manner is realized.

The invention provides automatic Chinese chestnut cutting equipment, which comprises the following operation processes:

The method comprises the steps of moving equipment to a working place through a bottom roller, respectively rotating a knob above the roller, enabling a parking rod to extend out of the bottoms of four rollers to be supported on the ground, fixing and keeping the equipment horizontal, pouring Chinese chestnut to be processed into a square hopper above the equipment, placing a collecting container at the outlet of a chute of a collecting device, finally switching on the equipment and switching on a motor switch, and enabling the Chinese chestnut to pass through each device of the equipment to realize incision treatment and enter the collecting container placed by the user.

The foregoing examples are illustrative of the present invention and are not intended to be limiting, and any other changes, modifications, substitutions, combinations, and simplifications that do not depart from the spirit and principles of the invention are intended to be equivalent substitutions for achieving the objects of the invention, but these changes and modifications are intended to be within the scope of the appended claims.

Claims

1. A rotary slicing type automatic chestnut cutting device, characterized in that it comprises: a frame-type carrier (1); a feeding device (2) arranged on the top of the frame-type carrier (1), the feeding device (2) comprising a square hopper (2-1) and a trough-shaped conveyor belt (2-2), the bottom of the square hopper (2-1) is open and is not connected to the trough-shaped conveyor belt (2-2), and a dustpan-shaped slideway (2-3) is provided below the front end of the trough-shaped conveyor belt (2-2); a turning and conveying device (3) arranged below the feeding device (2), the turning and conveying device (3) comprising a conveyor belt (3-1), a guide groove (3-3), a conveyor driving shaft (3-4 ) and a conveyor belt driven shaft (3-2); a cutting device (4) arranged at the front of the flipping and conveying device (3), the cutting device (4) comprising a front pressure wheel (4-2), a rear pressure wheel (4-4), a pressure wheel belt (4-1), a knife holder (4-10) and a sawtooth circular blade (4-7), the front pressure wheel (4-2) and the rear pressure wheel (4-4) are connected through the pressure wheel belt (4-1), the cutting device (4) is composed of two groups of pressure wheels, each group of pressure wheels is composed of two symmetrical pressure wheels at a certain distance from each other, the rear group of pressure wheels is fixed and higher than the front group; the knife holder is sandwiched between the left and right pressure wheels of the front group (4-10) and is fixedly connected to the front belt pulley shaft, a serrated circular blade (4-7) is arranged on the knife holder, and the gear on the blade gear shaft (4-9) is connected to the blade reversing gear (4-8) on the knife holder and then meshes with the inner gear ring of the front belt pulley, so that the serrated circular blade and the front belt pulley are reversed, and the serrated circular blade extends 1mm from the gap between the two belt pulleys; in addition, the front group of belt pulleys and the knife holder (4-10) fixedly connected to the front belt pulley shaft can float up and down with the front belt pulley shaft under the action of the spring (4-6) on the front belt pulley shaft (4-3), so as to achieve the purpose of profiling the chestnut convex surface and performing equal depth incision processing; the collecting device ( 5), the collecting device (5) includes an inclined groove (5-1) and an infrared sensor (5-2); a power input device (6) arranged on one side of the frame-type carrier (1), including a motor (6-1), a bevel gear reducer (6-2), a synchronous wheel belt (6-5) and a speed matching belt (6-6), the motor (6-1) drives the conveyor belt driving shaft (3-4) through the bevel gear reducer (6-2), the conveyor belt driving shaft is connected to the belt pressure wheel reversing gear (6-3) through the synchronous wheel belt (6-5) and then connected to the rear belt pressure wheel shaft (4-5) in the cutting device (4); a moving and parking device (7) is arranged at the bottom of the frame-type carrier (1).

2. The rotary cutting type automatic chestnut cutting equipment according to claim 1 is characterized in that: after the chestnuts to be processed enter the square hopper, they move forward along the trough-shaped conveyor belt, and after encountering the obstruction of the front wall of the square hopper (2-1), they fall into the single-row long groove on the trough-shaped conveyor belt, leave the square hopper along the trough-shaped conveyor belt, and slide onto the turning and transporting device (3) through the dustpan-shaped slide (2-3).

3. The rotary cutting type automatic chestnut cutting equipment according to claim 2 is characterized in that: the chestnuts to be processed slide onto the moving conveyor belt (3-1) at a certain relative speed and then flip over to have the convex surface facing upward, and move forward together with the conveyor belt, and after passing through the guide groove (3-3) connected to the frame-type carrier, they are arranged in several rows and successively enter each group of cutting devices (4) for simultaneous cutting processing.

4. The rotary cutting type automatic chestnut cutting equipment according to claim 1 is characterized in that: the inclined groove (5-1) is located below the cutting device (4); each group of chestnuts naturally falls onto the inclined groove and slides toward a unified outlet after being processed by the cutting device; in addition, when the chestnuts leave the cutting device and fall into the inclined groove, the chestnuts can be counted one by one by passing through the infrared sensor (5-2), which is convenient for subsequent unified collection in batches.

5. The automatic chestnut cutting equipment of the rotary cutting type according to claim 4 is characterized in that: the power input device (6) is composed of a motor, a bevel gear reducer, a pressure wheel reverse gear, and a synchronous wheel belt. The motor (6-1) transmits power to the conveyor belt driving shaft (3-4) in the flipping and conveying device (3) after being connected through the bevel gear reducer (6-2); the conveyor belt driving shaft is connected to the pressure wheel reverse gear (6-3) through the synchronous wheel belt (6-5) and then connected to the rear pressure wheel shaft (4-5) in the cutting device (4), so that the upper side of the conveyor belt and the lower side of the pressure wheel belt move at the same speed and in the same direction, ensuring that the pressure wheel belt clamps the chestnuts for cutting processing more stably; at the same time, the conveyor belt driven shaft (3-2) and the conveyor belt driving shaft (2-4) are connected by a speed matching belt (6-6) to ensure that the trough conveyor belt and the conveyor belt move at a certain speed relationship.

6. The automatic chestnut cutting equipment with rotary cutting according to claim 5 is characterized in that: the moving and stopping device (7) is composed of a wheel body (7-1), a universal wheel device is arranged at one end of the wheel body, the universal wheel (7-10) is connected to the outer sleeve (7-8) of the universal wheel through the wheel axle (7-9), and the relative sliding of the outer sleeve (7-8) of the universal wheel and the inner sleeve (7-7) of the universal wheel can realize the all-round rotation of the universal wheel in the horizontal direction; in addition, a knob (7-5) is arranged outside the wheel body and connected to the internal worm (7-4), and the worm (7-4) is connected to the rotating shaft (7-3) through the worm wheel (7-2), and the rotating shaft (7-3) drives the rotating stopping rod (7-6) to move through the sliding groove, so that the rotating stopping rod (7-6) can realize the rotation and lifting support on the ground and realize self-locking.