CN210060387U

CN210060387U - Full-automatic loading device for steel balls of universal wheel

Info

Publication number: CN210060387U
Application number: CN201920728757.0U
Authority: CN
Inventors: 杨鑫波
Original assignee: Jiangsu Shenpai Caster Co Ltd
Current assignee: Jiangsu Shenpai Caster Co Ltd
Priority date: 2019-05-21
Filing date: 2019-05-21
Publication date: 2020-02-14
Anticipated expiration: 2029-05-21

Abstract

The utility model discloses a full-automatic loading device for steel balls of universal wheels, which comprises a supporting component, a loading component, a pre-loading component, a workpiece placing table, a PLC controller and a control panel, wherein the loading component comprises a first vertical plate and a second vertical plate, the first vertical plate is respectively matched with the supporting component in a transverse sliding way and matched with the second vertical plate in a longitudinal sliding way, the first vertical plate and the second vertical plate are respectively fixedly connected with a transverse guiding cylinder and a longitudinal guiding cylinder, the upper end and the lower end of the outer side surface of the second vertical plate are respectively and correspondingly provided with a push-pull cylinder and a longitudinal bearing seat with a vertically downward piston, the lower end of the longitudinal bearing seat is provided with a steel ball grabbing plate, a spring clamping plate and a tightening ring, the upper end of the tightening ring is fixedly connected with the piston of the push-pull cylinder, the pre-loading component comprises a hopper, a steel ball presetting plate connected with the piston of a lifting cylinder is arranged in the hopper, the control panel is connected with the input end of the PLC.

Description

Full-automatic loading device for steel balls of universal wheel

Technical Field

The utility model relates to an universal wheel production facility technical field, concretely relates to full automatic loading device of universal wheel steel ball.

Background

The caster is a general term and comprises a movable caster and a fixed caster. The fixed caster has no rotating structure, can not rotate horizontally but can only rotate vertically. The castor is a so-called movable caster, and the structure of the castor allows 360-degree horizontal rotation. These two types of casters are commonly used in combination, for example, a cart has a structure with two fixed wheels at the front and two movable universal wheels at the rear, which are close to the pushing handrail. The universal wheel is widely applied to various industries and fields such as mines, mechanical equipment, electronic equipment, medical equipment, engineering decoration, textile, printing and dyeing, furniture, logistics equipment, warehousing, turnover vehicles, cabinets, equipment, electromechanics, dust-free workshops, production lines, large supermarkets and the like due to the flexibility of the universal wheel. The steel balls in the universal wheel are the basis for the universal rotating function of the universal wheel, but in the prior art, the steel balls of the universal wheel are mostly loaded in a manual loading mode or a semi-manual loading mode, so that the problems of low working efficiency and high labor cost exist.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to overcome the defect that exists among the prior art, provide a full automatic loading device of universal wheel steel ball, this device has realized the full automatization that the universal wheel steel ball loaded the steel ball process, and the device simple structure, and the practicality is strong.

In order to achieve the purpose, the technical scheme of the utility model is to design a full-automatic universal wheel steel ball filling device, which comprises a supporting component, a filling component, a pre-filling component, a workpiece placing platform, a PLC controller and a control panel, wherein the supporting component comprises a horizontal bottom plate and a vertical supporting plate, the lower end of the vertical supporting plate is fixedly connected with the upper end surface of the horizontal bottom plate, the filling component comprises a first vertical plate and a second vertical plate which are parallel to each other, two side surfaces of the first vertical plate are respectively in transverse sliding fit with one side surface of the vertical supporting plate through a sliding component and in longitudinal sliding fit with the inner side surface of the second vertical plate, one end of the first vertical plate and one end of the second vertical plate are respectively and fixedly connected with a transverse guiding cylinder and a longitudinal guiding cylinder, the upper end and the lower end of the outer side surface of the second vertical plate are respectively and correspondingly provided with a, a steel ball grabbing disc is detachably arranged at the lower end of the longitudinal bearing seat, a steel ball clamping groove is formed in the lower end face of the steel ball grabbing disc, a plurality of spring clamping pieces corresponding to the steel ball clamping groove in position are arranged on the outer circumferential face of the longitudinal bearing seat, a tightening ring is further sleeved on the outer sides of the spring clamping pieces, the upper end of the tightening ring is fixedly connected with the lower end of a piston of a push-pull cylinder through a telescopic rod, the pre-filling component comprises a hopper, a steel ball presetting disc and a lifting cylinder with a piston vertically upward are arranged in the hopper, the lower end of the steel ball presetting disc is detachably connected with the piston of the lifting cylinder, a steel ball presetting groove corresponding to the steel ball clamping groove in position is formed in the upper end face of the steel ball presetting disc, and the push-pull cylinder, the lifting cylinder, a transverse guide cylinder and the longitudinal guide cylinder are, and the control panel is in signal connection with the input end of the PLC.

The push-pull cylinder, the lifting cylinder, the transverse guide cylinder and the longitudinal guide cylinder of the device are all in signal connection with the output end of the PLC, the control panel is in signal connection with the input end of the PLC, the device realizes the full automation of the universal wheel steel ball loading process, improves the working efficiency of the universal wheel steel ball loading process, and has simple structure and strong practicability; the steel ball grabbing plate and the steel ball presetting plate are detachably connected with the longitudinal bearing seat and the piston of the lifting cylinder respectively, the universality of the equipment is improved, and the corresponding steel ball grabbing plate and the corresponding steel ball presetting plate can be flexibly installed according to different workpiece sizes.

In order to facilitate the smooth manufacture and application implementation of the device, the preferable technical scheme is that the steel ball grabbing disc and the steel ball presetting disc are respectively and fixedly connected with the push-pull cylinder piston and the lifting cylinder piston through bolts.

In order to ensure the firmness of the loading assembly to the clamping of the steel balls in the using process of the device, a further preferred technical scheme is that the lower end of a steel ball clamping groove of the steel ball grabbing plate and the part, facing the outer side wall of the steel ball grabbing plate, of the steel ball grabbing plate are provided with opening structures which are communicated with each other, the spring clamping piece comprises an upper section arc piece and a lower section arc piece which are connected in a welded mode, the concave part of the upper section arc piece is outward, the concave part of the lower section arc piece is inward, the upper end of the upper section arc piece is fixedly connected with the outer peripheral face of the upper end of the longitudinal bearing seat, the lower section arc piece corresponds to the opening position of the steel ball clamping groove, the lower section arc piece is located on a circular ring which has the same circle center as the steel ball grabbing plate, and.

In order to ensure the accurate matching of the workpiece placing table and the filling assembly, the further preferred technical scheme is that the workpiece placing table comprises a rotary table, a driving motor and a speed reducer, a plurality of workpiece placing grooves are formed in the upper end face of the rotary table in an even annular mode, a rotating shaft of the rotary table is connected with an output shaft of the driving motor through the speed reducer, and the speed reducer is connected with an output end signal of the PLC. The PLC controller realizes the accurate control of the rotating speed of the rotary table through the speed reducer, so that the work steps of the workpiece placed on the rotary table and the filling assembly are consistent, the work accuracy of the device is ensured, and the work efficiency of the device is ensured.

Further preferred technical scheme still includes the base, supporting component, the subassembly that loads, the subassembly of packing in advance, the platform is placed to the work piece and the PLC controller all set up in the up end of base still is equipped with rings the lower terminal surface of base is equipped with the gyro wheel, is equipped with the retaining member on the gyro wheel. The supporting assembly, the filling assembly, the pre-filling assembly, the workpiece placing table and the PLC are all arranged on the upper end face of the base, so that the position accuracy among the assemblies on the base is ensured; the upper end face of the base is provided with the lifting rings, the lower end face of the base is provided with the rollers, and integral hoisting and carrying of the device are facilitated.

In order to facilitate the smooth manufacture and application implementation of the device, a further preferred technical scheme is that the sliding assembly comprises a plurality of guide posts and guide grooves which are matched with each other, the vertical support plate is of an inverted L-shaped structure or a T-shaped structure, the vertical support plate comprises a transverse support plate and a vertical support plate, the guide posts or the guide grooves are arranged on the transverse support plate of the vertical support plate, and an inclined support plate is further arranged between the horizontal bottom plate and the vertical support plate. Still be equipped with the inclined supporting plate between horizontal bottom plate and the vertical support board, guaranteed the device's stable fastness.

In order to facilitate the installation of the push-pull cylinder and the longitudinal bearing seat, a further preferred technical scheme is that a cylinder fixing plate and a bearing seat fixing plate which are parallel to each other are respectively arranged at the upper end and the lower end of the outer side surface of the second vertical plate, and the push-pull cylinder and the longitudinal bearing seat are respectively arranged on the cylinder fixing plate and the bearing seat fixing plate.

In order to realize quantitative presetting of working parameters of the device, the technical scheme is further preferably that a pressure sensor is arranged in the tightening ring, a counter is arranged on the lifting cylinder, the pressure sensor and the counter are in signal connection with the input end of the PLC, and a power switch, a working switch, a workpiece quantity filling setting knob, a tightening pressure setting knob and a display module are arranged on the control panel.

In order to facilitate the operator to observe the working parameters and the working process of the device, a further preferred technical scheme is that the display module comprises a set workpiece loading quantity display unit, an actual workpiece loading quantity display unit, a set pressure display unit and a working pressure display unit.

In order to realize the remote monitoring of the device by an operator, the device further preferably comprises an alarm, a buzzer and a wireless communication module, wherein the alarm, the buzzer and the wireless communication module are all in signal connection with the output end of the PLC. The operating personnel can know the operating condition of this device at any time through mobile client, and wherein when the device work process was ended, bee calling organ sent the buzzer and promoted operating personnel, and the alarm sends alarm sound and reminds the operating personnel when the device trouble, has guaranteed the device's work security.

The utility model has the advantages and the beneficial effects that:

1. the push-pull cylinder, the lifting cylinder, the transverse guide cylinder and the longitudinal guide cylinder of the device are all in signal connection with the output end of the PLC, the control panel is in signal connection with the input end of the PLC, the device realizes the full automation of the universal wheel steel ball loading process, improves the working efficiency of the universal wheel steel ball loading process, and has simple structure and strong practicability; the steel ball grabbing plate and the steel ball presetting plate are detachably connected with the longitudinal bearing seat and the piston of the lifting cylinder respectively, the universality of the equipment is improved, and the corresponding steel ball grabbing plate and the corresponding steel ball presetting plate can be flexibly installed according to different workpiece sizes.

2. The steel ball grabbing plate is characterized in that the lower end of a steel ball clamping groove of the steel ball grabbing plate and the part, facing the outer side wall of the steel ball grabbing plate, of the steel ball grabbing plate are provided with opening structures which are communicated with each other, a spring clamping piece comprises an upper section arc piece and a lower section arc piece which are connected in a welded mode, a concave portion of the upper section arc piece is outward, a concave portion of the lower section arc piece is inward, the upper end of the upper section arc piece is fixedly connected with the outer peripheral face of the upper end of the longitudinal bearing seat, the lower section arc piece corresponds to the opening position of the steel ball clamping groove, the lower section arc piece is located on a circular ring, the circle center of the lower section arc piece is the same. The lower arc piece is positioned on the circular ring with the same circle center as the steel ball grabbing plate, so that the steel balls positioned in the steel ball clamping grooves are good in clamping force uniformity, the device is guaranteed not to have individual steel balls falling off in the steel ball loading process, and the working efficiency of the device is improved.

3. The workpiece placing table comprises a rotary table, a driving motor and a speed reducer, a plurality of workpiece placing grooves are formed in the upper end face of the rotary table, a rotating shaft of the rotary table is connected with an output shaft of the driving motor through the speed reducer, and the speed reducer is connected with an output end signal of the PLC. The PLC controller realizes the accurate control of the rotating speed of the rotary table through the speed reducer, so that the work of the workpiece on the rotary table and the work of the filling assembly are in step, the working accuracy of the device is ensured, and the working efficiency of the device is ensured.

4. Still include the base, supporting component, fill subassembly, prefill material subassembly, work piece place the platform and PLC controller all set up in the up end of base still is equipped with rings the lower terminal surface of base is equipped with the gyro wheel, is equipped with the retaining member on the gyro wheel. The supporting assembly, the filling assembly, the pre-filling assembly, the workpiece placing table and the PLC are all arranged on the upper end face of the base, so that the position accuracy among the assemblies on the base is ensured; the upper end face of the base is provided with the lifting rings, the lower end face of the base is provided with the rollers, and integral hoisting and carrying of the device are facilitated.

5. The tightening ring is internally provided with a pressure sensor, the pressure sensor is connected with an input end signal of the PLC, and the control panel is provided with a power switch, a working switch, a workpiece loading quantity setting knob, a tightening pressure setting knob and a display module. The quantitative presetting of the working parameters of the device is realized.

6. The display module comprises a display unit for setting the number of the filled workpieces, a display unit for actually filling the number of the workpieces, a display unit for setting pressure and a display unit for working pressure. The operating parameters and the working process of the utility model are convenient for the operator to observe.

7. The PLC controller is characterized by further comprising an alarm, a buzzer and a wireless communication module, wherein the alarm, the buzzer and the wireless communication module are in signal connection with the output end of the PLC controller. The operating personnel can know the operating condition of this device at any time through mobile client, and wherein when the device work process was ended, bee calling organ sent the buzzer and promoted operating personnel, and the alarm sends alarm sound and reminds the operating personnel when the device trouble, has guaranteed the device's work security.

Drawings

FIG. 1 is a schematic structural view of a fully automatic device for loading steel balls into a universal wheel in embodiment 1;

FIG. 2 is a bottom view of the bead gripping disk of example 1;

FIG. 3 is a top view of the steel bead presetting tray in example 1;

FIG. 4 is a plan view of a structure of a work placing table in embodiment 2;

FIG. 5 is a block diagram of a control system of the device for full-automatic loading of steel balls into universal wheels in embodiment 2.

In the figure: 1. a horizontal floor; 2. a vertical support plate; 3. a first vertical plate; 4. a second vertical plate; 5. a transverse guide cylinder; 6. a longitudinal guide cylinder; 7. a push-pull cylinder; 8. a longitudinal bearing seat; 9. a steel ball grabbing plate; 10. a steel ball clamping groove; 11. a spring clip; 12. tightening the ring; 13. a telescopic rod; 14. a hopper; 15. steel ball presetting disc; 16. a steel ball presetting groove; 17. a workpiece placing table; 18. a turntable; 19. a workpiece placing groove; 20. a base; 21. a guide post; 22. a guide groove; 23. a diagonal bracing plate; 24. a cylinder fixing plate; 25. bearing frame fixed plate.

Detailed Description

The following description will further describe embodiments of the present invention with reference to the accompanying drawings and examples. The following examples are only for illustrating the technical solutions of the present invention more clearly, and the protection scope of the present invention is not limited thereby.

Example 1

As shown in figures 1-3, the utility model relates to a full-automatic universal wheel steel ball loading device, which comprises a supporting component, a loading component, a pre-loading component, a workpiece placing table 17, a PLC controller and a control panel, wherein the supporting component comprises a horizontal bottom plate 1 and a vertical supporting plate 2, the lower end of the vertical supporting plate 2 is fixedly connected with the upper end surface of the horizontal bottom plate 1, the loading component comprises a first vertical plate 3 and a second vertical plate 4 which are parallel to each other, two side surfaces of the first vertical plate 3 are respectively in transverse sliding fit with one side surface of the vertical supporting plate 2 through a sliding component and in longitudinal sliding fit with the inner side surface of the second vertical plate 4, one end of the first vertical plate 3 and one end of the second vertical plate 4 are respectively fixedly connected with a transverse guiding cylinder 5 and a longitudinal guiding cylinder 6, the upper end of the second vertical plate 4 is provided with a cylinder fixing plate, the longitudinal guiding cylinder 6 is arranged on the cylinder fixing plate on the, the upper end and the lower end of the outer side surface of the second vertical plate 4 are respectively and correspondingly provided with a push-pull cylinder 7 with a vertically downward piston and a longitudinal bearing seat 8, the lower end of the longitudinal bearing seat 8 is detachably provided with a steel ball grabbing disc 9, the lower end surface of the steel ball grabbing disc 9 is provided with a steel ball clamping groove 10, the outer peripheral surface of the longitudinal bearing seat 8 is provided with a plurality of spring clamping pieces 11 corresponding to the positions of the steel ball clamping grooves 10, the outer side of each spring clamping piece 11 is also sleeved with a tightening ring 12, the upper end of the tightening ring 12 is fixedly connected with the lower end of a piston of the push-pull cylinder 7 through a telescopic rod 13, the pre-filling component comprises a hopper 14, a steel ball presetting disc 15 and a lifting cylinder with a vertically upward piston are arranged in the hopper 14, the lower end of the steel ball presetting disc 15 is detachably connected with the piston of the lifting cylinder, and the upper end surface of the steel ball presetting, the push-pull air cylinder 7, the lifting air cylinder, the transverse guide air cylinder 5 and the longitudinal guide air cylinder 6 are all in signal connection with the output end of the PLC, and the control panel is in signal connection with the input end of the PLC. The steel ball grabbing plate is characterized in that the lower end of a steel ball clamping groove 10 of the steel ball grabbing plate 9 and the part, facing the outer side wall of the steel ball grabbing plate 9, of the steel ball grabbing plate are provided with opening structures which are communicated with each other, a spring clamping piece 11 comprises an upper section arc piece and a lower section arc piece which are connected in a welded mode, a concave portion of the upper section arc piece is outward, a concave portion of the lower section arc piece is inward, the upper end of the upper section arc piece is fixedly connected with the outer peripheral face of the upper end of the longitudinal bearing seat 8, the lower section arc piece corresponds to the opening position of the steel ball clamping groove 10, the lower section arc piece is located on a circular ring which is in the same circle center as the steel ball grabbing plate 9. Still include base 20, supporting component, filling subassembly, prefill material subassembly, work piece are placed platform 17 and PLC controller and all set up in the up end of base 20 still is equipped with rings (not shown) the lower terminal surface of base 20 is equipped with gyro wheel (not shown), is equipped with the retaining member on the gyro wheel. The sliding assembly comprises a plurality of guide posts 21 and guide grooves 22 which are mutually matched, the vertical support plate 2 is of an inverted L-shaped structure or a T-shaped structure, the vertical support plate 2 comprises a transverse support plate and a vertical support plate, the guide posts 21 or the guide grooves 22 are arranged on the transverse support plate of the vertical support plate 2, and an inclined support plate 23 is further arranged between the horizontal bottom plate 1 and the vertical support plate 2. And the upper end and the lower end of the outer side surface of the second vertical plate 4 are respectively provided with an air cylinder fixing plate 24 and a bearing seat fixing plate 25 which are parallel to each other, and the push-pull air cylinder 7 and the longitudinal bearing seat 8 are respectively arranged on the air cylinder fixing plate 24 and the bearing seat fixing plate 25.

In order to facilitate the observation of the working parameters and the working process of the utility model by the operator, the display module further preferably comprises a display unit for setting the quantity of the filled workpieces, a display unit for actually filling the quantity of the filled workpieces, a display unit for setting the pressure and a display unit for the working pressure.

Example 2

As shown in fig. 4, the difference between the embodiment 2 and the embodiment 1 is that the workpiece placing table 17 includes a rotary table 18, a driving motor and a speed reducer, a plurality of workpiece placing grooves 19 are uniformly and annularly arranged on an upper end surface of the rotary table 18, a rotating shaft of the rotary table 18 is connected with an output shaft of the driving motor through the speed reducer, and the speed reducer is in signal connection with an output end of the PLC controller.

As shown in fig. 5, the control panel, the pressure sensor and the counter are all in signal connection with the input end of the PLC controller, and the push-pull cylinder, the lifting cylinder, the transverse guiding cylinder, the longitudinal guiding cylinder, the speed reducer, the alarm, the buzzer and the wireless communication module are all in signal connection with the output end of the PLC controller.

The utility model discloses the theory of operation of device:

starting a power switch on a control panel, setting the number of workpieces to be processed by a workpiece loading number setting knob, setting the working pressing force of a tightening ring 12 by a tightening pressure setting knob, and adding a certain amount of steel balls into a hopper 14; starting a working switch on a control panel, pushing a first vertical plate 3 to one end, close to a hopper 14, of a vertical supporting plate 2 by a transverse guide cylinder 5, pushing a second vertical plate 4 to the lowest end of the first vertical plate 3 by a longitudinal guide cylinder 6, pushing a steel ball preset disc 15 upwards to the highest end from the lowest end of the hopper 14 by a lifting cylinder (the steel ball preset disc 15 is in butt joint with a steel ball grabbing disc 9), and pushing and pulling a tightening ring 12 downwards to a preset compression force value by a push-pull cylinder 7 through a telescopic rod 13; the lifting cylinder shrinks the steel ball presetting disc 15 downwards from the highest end to the lowest end of the hopper 14, meanwhile, the longitudinal guide cylinder 6 pushes the second vertical plate 4 from the lowest end to the highest end of the first vertical plate 3, and the transverse guide cylinder 5 pushes the first vertical plate 3 from one end close to the hopper 14 to the far end (corresponding to the position of the workpiece placing groove 19) of the vertical support plate 2; vertical direction cylinder 6 pushes away second riser 4 to the least significant end (the steel ball snatchs the disc 9 and connects with the work piece in the work piece standing groove 19 relatively) from the most significant end of first riser 3, push-and-pull cylinder 7 upwards mentions tightening ring 12 through telescopic link 13, the steel ball is then detained in the steel ball installing network of work piece, driving motor drives the carousel 18 through the reduction gear and rotates to next work piece, vertical direction cylinder 6 pushes away second riser 4 to the most significant end from the least significant end of first riser 3 simultaneously, horizontal direction cylinder 5 pushes away first riser 3 to the one end that is close to hopper 14 from the one end of keeping away from hopper 14, accomplish a steel ball loading work, so the reciprocal work piece steel ball that carries on of circulation loads.

The device comprises a set workpiece loading quantity display unit, an actual workpiece loading quantity display unit, a set pressure display unit, a working pressure display unit and a tension ring clamping force display unit, wherein the set workpiece loading quantity display unit displays the set workpiece quantity (namely the total workpiece quantity), the actual workpiece loading quantity display unit displays the actual workpiece machining quantity, the set pressure display unit displays the set tension ring clamping force value, and the working pressure display unit displays the actual tension ring clamping force value; after processing is completed, the buzzer sends out buzzing sound to remind workers, when equipment breaks down, the alarm sends out alarm sound to inform the workers, meanwhile, the PLC sends the working information of the device to a worker mobile client side in real time through the wireless communication module, and remote monitoring of the device is achieved.

The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, a plurality of improvements and decorations can be made without departing from the technical principle of the present invention, and these improvements and decorations should also be regarded as the protection scope of the present invention.

Claims

1. A full-automatic universal wheel steel ball filling device is characterized by comprising a supporting component, a filling component, a pre-filling component, a workpiece placing table, a PLC (programmable logic controller) and a control panel, wherein the supporting component comprises a horizontal bottom plate and a vertical supporting plate, the lower end of the vertical supporting plate is fixedly connected with the upper end face of the horizontal bottom plate, the filling component comprises a first vertical plate and a second vertical plate which are parallel to each other, two side faces of the first vertical plate are respectively in transverse sliding fit with one side face of the vertical supporting plate through a sliding component and in longitudinal sliding fit with the inner side face of the second vertical plate, one end of the first vertical plate and one end of the second vertical plate are respectively and fixedly connected with a transverse guide cylinder and a longitudinal guide cylinder, the upper end and the lower end of the outer side face of the second vertical plate are respectively and correspondingly provided with a push-pull cylinder and a longitudinal bearing seat with a piston facing downwards, the lower end face of the steel ball grabbing plate is provided with a steel ball clamping groove, the outer peripheral face of the longitudinal bearing seat is provided with a plurality of spring clamping pieces corresponding to the steel ball clamping groove in position, a tightening ring is further sleeved on the outer side of each spring clamping piece, the upper end of the tightening ring is fixedly connected with the lower end of a piston of a push-pull cylinder through a telescopic rod, the pre-filling component comprises a hopper, a steel ball presetting plate and a lifting cylinder with a piston vertically upward are arranged in the hopper, the lower end of the steel ball presetting plate is detachably connected with the piston of the lifting cylinder, the upper end face of the steel ball presetting plate is provided with a steel ball presetting groove corresponding to the steel ball clamping groove in position, the push-pull cylinder, the lifting cylinder, the transverse guide cylinder and the longitudinal guide cylinder are all connected with output end signals of a PLC (programmable logic controller), and the control panel is connected.

2. The device for full-automatic loading of steel balls into universal wheels according to claim 1, wherein the steel ball grabbing disc and the steel ball presetting disc are respectively and fixedly connected with the push-pull cylinder piston and the lifting cylinder piston through bolts.

3. The device for fully automatically loading steel balls into the universal wheel of claim 2, wherein the lower ends of the steel ball clamping grooves of the steel ball gripping disc and the part facing the outer side wall of the steel ball gripping disc are provided with mutually communicated opening structures, the spring clamping piece comprises an upper section arc piece and a lower section arc piece which are welded, the concave part of the upper section arc piece is outward, the concave part of the lower section arc piece is inward, the upper end of the upper section arc piece is fixedly connected with the outer peripheral surface of the upper end of the longitudinal bearing seat, the lower section arc piece corresponds to the opening position of the steel ball clamping grooves, the lower section arc piece is positioned on a circular ring with the same circle center as the steel ball gripping disc, and the lower edge of the lower section arc piece is flush with the lower end surface of the steel ball gripping disc.

4. The device for fully automatically loading steel balls into universal wheels as claimed in claim 3, wherein the workpiece placing table comprises a turntable, a driving motor and a speed reducer, a plurality of workpiece placing grooves are uniformly and annularly arranged on the upper end surface of the turntable, a rotating shaft of the turntable is connected with an output shaft of the driving motor through the speed reducer, and the speed reducer is in signal connection with an output end of the PLC.

5. The device for fully automatically filling the steel balls into the universal wheels as claimed in claim 4, further comprising a base, wherein the supporting assembly, the filling assembly, the pre-filling assembly, the workpiece placing table and the PLC are all arranged on the upper end face of the base, a hanging ring is further arranged on the upper end face of the base, a roller is arranged on the lower end face of the base, and a locking member is arranged on the roller.

6. The device for fully automatically loading steel balls into universal wheels as claimed in claim 5, wherein the sliding assembly comprises a plurality of guide posts and guide grooves which are matched with each other, the vertical support plate is of an inverted L-shaped structure or a T-shaped structure, the vertical support plate comprises a transverse support plate and a vertical support plate, the guide posts or the guide grooves are arranged on the transverse support plate of the vertical support plate, and an inclined support plate is further arranged between the horizontal bottom plate and the vertical support plate.

7. The device for fully automatically loading steel balls into universal wheels as claimed in claim 6, wherein the upper end and the lower end of the outer side surface of the second vertical plate are respectively provided with a cylinder fixing plate and a bearing seat fixing plate which are parallel to each other, and the push-pull cylinder and the longitudinal bearing seat are respectively mounted on the cylinder fixing plate and the bearing seat fixing plate.

8. The device for fully automatically loading steel balls into universal wheels as claimed in claim 7, wherein a pressure sensor is arranged in the tightening ring, a counter is arranged on the lifting cylinder, the pressure sensor and the counter are both in signal connection with the input end of the PLC controller, and a power switch, a working switch, a workpiece loading number setting knob, a tightening pressure setting knob and a display module are arranged on the control panel.

9. The device for fully automatically loading steel balls into universal wheels as claimed in claim 8, wherein the display module comprises a display unit for the number of workpieces to be loaded, a display unit for the number of workpieces to be actually loaded, a display unit for the set pressure and a display unit for the working pressure.

10. The device for fully automatically loading steel balls into universal wheels as claimed in claim 9, further comprising an alarm, a buzzer and a wireless communication module, wherein the alarm, the buzzer and the wireless communication module are all in signal connection with the output end of the PLC.