A caster automatic assembly machine

Abstract

The present invention relates to the technical field of rubber wheel assembly, and in particular to an automatic caster assembly machine, comprising a bottom cabin, a top cabin being installed on the top of the bottom cabin, a guide seat being fixed in the top cabin, a large number of steel balls being installed in the top cabin, a vertically upward guide hole being opened in the guide seat, a guide column being installed in the guide hole, an electric cylinder connected to the bottom of the guide column being installed in the bottom cabin, the top end of the guide column penetrating to the top of the guide seat, an assembly seat being fixed on the top of the guide column, when the assembly seat assembles the steel ball onto the semi-finished caster, the piston rod will rise with the pressure-bearing seat, the bottom end of the caster axle will form an extrusion effect on the spherical surface, forcing the spherical surface to push the pressure-bearing seat down, at this time, pressure is formed in the oil chamber, and the lubricating oil in the oil chamber is sent into all oil pipes by using the pressure, so as to automatically oil the bottom surface of the steel ball, thereby solving the working mode of the prior art that requires distributed oiling and improving the assembly efficiency.

Description

Technical Field

[0001] The invention relates to the technical field of rubber wheel assembly machines, in particular to an automatic caster assembly machine. Background Art

[0002] In order to improve the assembly efficiency of casters, various automatic assembly machines have appeared on the market. The automatic assembly machine is composed of a production line, a material tray, a manipulator, a cylinder lifting system, a servo control system, etc. The cylinder lifting system is composed of a material cabin installed on one side of the assembly machine and a lifting mechanism arranged in the material cabin. The lifting mechanism is an important link for loading steel balls into the caster wheel rim. The principle is that the electric cylinder in the lifting mechanism pushes the assembly seat to rise, and the steel balls in the material cabin are lifted and pressed into the wheel rim by the rising action of the assembly seat. However, when the existing lifting mechanism uses the rising action of the assembly seat to press the steel balls into the wheel rim, the steel balls cannot be lubricated synchronously. After the caster is assembled as a whole, it still needs to be manually lubricated, which is inefficient. Therefore, how to improve the assembly efficiency in the lubricating oil link is a problem that the current assembly machine needs to solve. Summary of the invention

[0003] In order to solve the above problems, the present invention provides the following technical solutions:

[0004] A caster automatic assembly machine comprises a bottom cabin, a top cabin is installed on the top of the bottom cabin, a guide seat is fixed in the top cabin, a large number of steel balls are installed in the top cabin, a vertical upward guide hole is opened in the guide seat, a guide column is installed in the guide hole, an electric cylinder connected to the bottom of the guide column is installed in the bottom cabin, the top end of the guide column penetrates to the top of the guide seat, an assembly seat is fixed on the top end of the guide column, the assembly seat is annular, a steel ball cavity is opened on the top surface of the assembly seat, and the opening of the steel ball cavity The mouth faces upward, the assembly seat can be lifted under the drive of the guide column, and the steel ball is assembled to the caster by using the steel ball cavity, a vertical oil cavity is opened in the guide column, a piston is assembled in the oil cavity, the top of the piston is connected to a piston rod, the top of the piston rod enters the top of the assembly seat, and a pressure seat is installed on the top of the piston rod, the top surface of the pressure seat protrudes from the top surface of the assembly seat, a spring is arranged between the top of the pressure seat and the assembly seat, and the spring is sleeved on the pressure seat;

[0005] The oil cavity is filled with lubricating oil, and an oil pipe is connected between the oil cavity and the assembly seat. There are several oil pipes, and the several oil pipes are distributed in a circular array on the periphery of the guide column. The top ends of the several oil pipes enter the bottom of the steel ball cavity from the bottom surface of the assembly seat.

[0006] As a further preference, the steel ball cavity is annular, and the cross-sectional shape of the steel ball cavity is composed of a semicircular cavity at the top and a U-shaped cavity at the bottom, and a plurality of the oil pipes enter the U-shaped cavity from the bottom surface of the assembly seat.

[0007] As a further preferred embodiment, a countersunk hole is provided on the top of the assembly seat, and a spherical surface is provided on the top of the pressure-bearing seat that protrudes from the top surface of the assembly seat. The bottom diameter of the spherical surface is larger than the diameter of the pressure-bearing seat, and the bottom surface of the spherical surface faces the bottom of the countersunk hole. The upper and lower ends of the spring elastically contact between the bottom of the countersunk hole and the bottom surface of the spherical surface.

[0008] As a further preferred embodiment, a blanking hole is provided on the inner periphery of the assembly seat, and the edge of the blanking hole is provided with a rounded corner.

[0009] As a further preferred embodiment, a replenishing cylinder is provided on the top cabin, wherein the replenishing cylinder is filled with lubricating oil, the replenishing cylinder is located above the oil chamber and higher than the pressure bearing seat, the bottom end of the replenishing cylinder is connected to a hose, and the other end of the hose extends downward and is connected to the oil chamber.

[0010] As a further preferred embodiment, a ring is provided in the top cabin, and the ring is located above the assembly seat. A fixing plate is connected between the outer wall of the ring and the inner wall of the top cabin, and the fixing plate gradually tilts upward toward one end of the ring. The inner diameter of the ring is larger than the diameter of the outer cylindrical surface of the assembly seat, and the outer cylindrical surface of the assembly seat is close to the inner wall of the ring. The assembly seat enters the ring during the lifting action, and an annular rubber is provided on the inner wall of the ring. The inner diameter of the rubber is smaller than the diameter of the outer cylindrical surface of the assembly seat, and the cross-sectional shape of the rubber is arc-shaped, so that the arc-shaped inner surface of the rubber bulges inward.

[0011] As a further preference, the fixing plate is a spring plate, and when the inner ring of the rubber is squeezed, the squeezing force is transmitted to the ring, so that the diameter of the ring becomes larger, and the ring pushes the fixing plate to become springy shorter.

[0012] As a further preferred embodiment, a lifting plate is fixed in the top cabin, a lifting hole is opened in the middle of the lifting plate, the lifting plate is sleeved on the guide seat through the lifting hole, an upper compartment is formed in the top cabin above the lifting plate, a steel ball is located in the upper compartment, and the height of the steel ball is adjusted when the lifting plate rises.

[0013] Compared with the prior art, the present invention has the following beneficial effects:

[0014] The existing assembly seat is improved, and an oil chamber for storing lubricating oil is arranged inside the assembly seat. A piston and other components are arranged in the oil chamber. When the assembly seat automatically presses the steel ball onto the caster, it will bring the piston rod up, and the piston rod will bring the pressure seat up. Since the top of the pressure seat protrudes from the top surface of the assembly seat and the pressure seat is located at the center of the assembly seat, when the pressure seat rises, the bottom end of the wheel axle forms an extrusion effect on the spherical surface, forcing the spherical surface to push the pressure seat down, the spring is compressed and shortened, and the piston rod pushes the piston to descend along the oil chamber, making the oil chamber gradually smaller. At this time, pressure is formed in the oil chamber, and the pressure is used to send the lubricating oil in the oil chamber into all oil pipes, so as to automatically oil the bottom surface of the steel ball, thereby solving the working mode of the prior art that requires distributed oiling and improving assembly efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 A schematic diagram of an automatic caster assembly machine provided in an embodiment of the present invention;

[0016] Figure 2 A schematic top view of an automatic caster assembly machine provided in an embodiment of the present invention;

[0017] Figure 3 A caster automatic assembly machine provided by the embodiment of the present invention comprises Figure 2 The main plane diagram of the section A is shown below;

[0018] Figure 4 A caster automatic assembly machine provided by the embodiment of the present invention comprises Figure 3 The enlarged schematic diagram of the B part is shown;

[0019] Figure 5 A schematic diagram of a caster automatic assembly machine provided by an embodiment of the present invention after being cut apart from a three-dimensional perspective;

[0020] Figure 6 A caster automatic assembly machine provided by the embodiment of the present invention comprises Figure 5 The local structure diagram is derived;

[0021] Figure 7 A schematic diagram of a caster automatic assembly machine provided by an embodiment of the present invention from a top cabin only perspective;

[0022] Figure 8 A schematic diagram of a caster automatic assembly machine provided by an embodiment of the present invention after being cut open and viewed from a partial upward angle;

[0023] Fig. 9 The caster structure to be assembled is utilized by the present invention.

[0024] In the figure: 1. bottom cabin; 2. top cabin; 3. guide seat; 4. guide hole; 5. guide column; 6. electric cylinder; 7. assembly seat; 8. steel ball chamber; 9. oil chamber; 10. piston; 11. piston rod; 12. pressure seat; 13. spring; 15. oil pipe; 16. semicircular chamber; 17. U-shaped chamber; 18. countersunk hole; 19. spherical surface; 20. blanking hole; 21. fillet; 22. replenishing cylinder; 23. hose; 24. collar; 25. rubber; 26. fixing plate; 27. lifting plate; 28. lifting hole; 29. ​​upper partition chamber. DETAILED DESCRIPTION

[0025] The above and other embodiments and advantages of the present invention are described clearly and completely below in conjunction with the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments.

[0026] In one embodiment, if Figure 1-Figure 9 As shown: This embodiment provides a caster automatic assembly machine, including a bottom cabin 1, a top cabin 2 is installed on the top of the bottom cabin 1, a guide seat 3 is fixed in the top cabin 2, a large number of steel balls are installed in the top cabin 2, a vertical upward guide hole 4 is opened in the guide seat 3, a guide column 5 is installed in the guide hole 4, an electric cylinder 6 connected to the bottom of the guide column 5 is installed in the bottom cabin 1, the top of the guide column 5 penetrates to the top of the guide seat 3, an assembly seat 7 is fixed on the top of the guide column 5, the assembly seat 7 is annular, and a steel ball cavity 8 is opened on the top surface of the assembly seat 7. The opening of 8 faces upward, the assembly seat 7 can be lifted under the drive of the guide column 5, and the steel ball is assembled to the caster by using the steel ball cavity 8. A vertical oil cavity 9 is opened in the guide column 5, and a piston 10 is assembled in the oil cavity 9. The top of the piston 10 is connected to a piston rod 11, and the top of the piston rod 11 enters the top of the assembly seat 7, and a pressure seat 12 is installed on the top of the piston rod 11. The top surface of the pressure seat 12 protrudes from the top surface of the assembly seat 7. A spring 13 is arranged between the top of the pressure seat 12 and the assembly seat 7, and the spring 13 is sleeved on the pressure seat 12;

[0027] The steel ball cavity 8 is annular, and the cross-sectional shape of the steel ball cavity 8 is composed of a semicircular cavity 16 at the top and a U-shaped cavity 17 at the bottom. A plurality of oil pipes 15 enter the U-shaped cavity 17 from the bottom surface of the assembly seat 7;

[0028] The oil chamber 9 is filled with lubricating oil, and an oil pipe 15 is connected between the oil chamber 9 and the assembly seat 7. There are a plurality of oil pipes 15, which are distributed in a circular array on the periphery of the guide column 5. The top ends of the plurality of oil pipes 15 enter the bottom of the steel ball chamber 8 from the bottom surface of the assembly seat 7.

[0029] A countersunk hole 18 is provided at the top of the assembly seat 7, and a spherical surface 19 protruding from the top surface of the assembly seat 7 is provided at the top of the pressure-bearing seat 12. The bottom diameter of the spherical surface 19 is larger than the diameter of the pressure-bearing seat 12, and the bottom surface of the spherical surface 19 faces the bottom of the countersunk hole 18. The upper and lower ends of the spring 13 elastically contact between the bottom of the countersunk hole 18 and the bottom surface of the spherical surface 19.

[0030] like Figures 3 to 6 As shown, a replenishing cylinder 22 is provided on the top cabin 2, and lubricating oil is filled in the replenishing cylinder 22. The replenishing cylinder 22 is located above the oil chamber 9 and higher than the pressure-bearing seat 12. The replenishing cylinder 22 is equivalent to a high-level box, which is used to fill the oil chamber 9 with lubricating oil through a hose 23.

[0031] Working principle and technical effect: when the assembly machine is powered on, under the control of the servo control system, the manipulator sends the semi-finished caster to the top of the top cabin 2, and the electric cylinder 6 (or air cylinder) is powered on, and its action rod pushes the guide column 5 to rise along the guide hole 4 of the guide seat 3, and the guide column 5 pushes the assembly seat 7 to rise. The assembly seat 7 is located below the inner cavity of the top cabin 2, that is, the assembly seat 7 is immersed in the steel ball of the top cabin 2. At this time, when the assembly seat 7 rises, it will rise with the semicircular cavity 16 on the top, and pass A small amount of steel balls are intercepted from a large number of steel balls through the semicircular cavity 16, and the intercepted steel balls are pressed into the wheel rim as the semicircular cavity 16 is lifted. Since the semicircular cavity 16 is annular, the intercepted steel balls are also distributed in annular shapes. Therefore, these steel rings are pressed against the wheel rim at this time, so that the steel balls are evenly distributed in the wheel rim. In addition, the assembly seat 7 is pressed into the wheel rim with the semicircular cavity 16, and the piston rod 11 is also raised, and the piston rod 11 is raised with the pressure seat 12. Since the top of the pressure seat 12 protrudes from the assembly seat 7, and the pressure seat 12 is located at the center of the assembly seat 7. Therefore, when the pressure seat 12 rises, the spherical surface 19 at the top can contact the wheel axle of the caster. The wheel axle has been assembled on the semi-finished caster in the previous process, and the wheel axle is located at the center of the wheel rim. Therefore, the bottom end of the wheel axle forms an extrusion effect on the spherical surface 19, forcing the spherical surface 19 to push the pressure seat 12 down. The pressure seat 12 pushes the piston rod 11 down. At this time, the spring 13 is compressed and shortened and stores elastic force. At this time, the piston rod 11 pushes the piston 10 As the oil chamber 9 descends, it gradually becomes smaller. At this time, pressure is formed in the oil chamber 9, and the lubricating oil in the oil chamber 9 is sent to all the oil pipes 15 by using the pressure. As the pressure gradually increases, the lubricating oil in the oil pipe 15 enters the U-shaped chamber 17. Since the steel ball is intercepted in the semicircular chamber 16 at the top of the U-shaped chamber 17 at this time, the lubricating oil enters the U-shaped chamber 17. At this time, the bottom surface of the steel ball is automatically oiled, which solves the working mode of distributed oiling in the prior art and improves assembly efficiency. When the manipulator transfers the semi-finished caster from the steel ball assembly process to the next process, the servo control system will control the electric cylinder 6 to bring the guide column 5 to descend in the opposite direction, and the guide column 5 will bring the assembly seat 7 to descend. At the same time, the top of the pressure seat 12 is no longer restricted by the bottom of the wheel axle, so the squeezing effect of the top of the pressure seat 12 disappears quickly. At this time, the spring 13 releases the elastic force upward and restores the length, and pushes the pressure seat 12 to reset and rise while restoring the length. The spherical surface 19 protrudes from the top surface of the assembly seat 7 again, and the pressure seat 12 resets and rises with the piston rod 11, and the piston rod 11 resets and rises with the piston 10. The assembly seat 7 is finally pulled back to the top cabin 2 again and is immersed in all the steel balls again. When the piston 10 resets upward, the connection end of the hose 23 and the oil chamber 9 is lower than the piston 10. When the piston 10 resets upward, the connection end of the hose 23 and the oil chamber 9 is lower than the piston 10. At this time, not only the volume of the oil chamber 9 becomes larger, but also the hose 23 will automatically replenish the lubricating oil in the replenishing cylinder 22 into the oil chamber 9.When the next semi-finished caster is transferred to the top of the top cabin 2 by the robot, the above assembly action is repeated, the piston 10 descends again, the volume of the oil chamber 9 becomes smaller again, the pressure increases again, the lubricating oil in the oil chamber 9 is injected into the U-shaped cavity 17 again through the oil pipe 15, and the assembly seat 7 rises from the top cabin 2 again, and while rising, some steel balls are intercepted from the top cabin 2 again and pressed on the semi-finished caster, and the steel balls are automatically oiled.

[0032] The inner periphery of the assembly seat 7 is provided with a blanking hole 20, and the edge of the blanking hole 20 is provided with a rounded corner 21. When the assembly seat 7 intercepts some steel balls from the numerous steel balls and pushes these steel balls upward, the excess steel balls will roll down from the blanking hole 20 back into the top compartment 2. The opening of the rounded corner 21 makes it easier for the excess steel balls to roll down through the blanking hole 20.

[0033] like Figure 5 , Figure 6 As shown, in another embodiment, a ring 24 is provided in the top cabin 2, and the ring 24 is located above the assembly seat 7. A fixing plate 26 is connected between the outer wall of the ring 24 and the inner wall of the top cabin 2. The fixing plate 26 gradually tilts upward toward one end of the ring 24. The inner diameter of the ring 24 is larger than the outer diameter of the assembly seat 7. The outer surface of the assembly seat 7 is close to the inner wall of the ring 24. The assembly seat 7 enters the ring 24 during the lifting action. An annular rubber 25 is provided on the inner wall of the ring 24. The inner diameter of the rubber 25 is smaller than the outer diameter of the assembly seat 7. The cross-sectional shape of the rubber 25 is arc-shaped, so that the arc-shaped inner surface of the rubber 25 bulges inward. When the assembly seat 7 rises, the operator manually or with tools or in actual production, another set of manipulators is set on the assembly machine to automatically press the spherical surface 19, and the spherical surface 19 pushes the piston rod 11 down, and the piston rod 11 pushes the piston 10 down, the spring 13 is compressed and shortened and stores elastic force, the volume of the oil chamber 9 can also become smaller, the pressure will also increase, and the lubricating oil in the oil chamber 9 will also be injected into the U-shaped cavity 17 through the oil pipe 15, and the steel balls intercepted in the semicircular cavity 16 are automatically oiled. The assembly seat 7 continues to rise, and while using the semicircular cavity 16 to push these steel balls to rise, they first enter the ring 24, and the inner wall protrusion of the rubber 25 faces the surface of the steel balls forcing these steel balls to roll, so that the surfaces of these steel balls effectively pass through the U-shaped cavity 17, so that the lubricating oil in the U-shaped cavity 17 is more evenly attached to the surface of the steel balls, and the assembly seat 7 continues to rise with these steel balls, and when these steel balls are assembled on the caster rim, the lubrication quality of these steel balls is greatly improved.

[0034] The fixing plate 26 is a spring plate. When the inner circle of the rubber 25 is squeezed, the squeezing force is transmitted to the ring 24, so that the diameter of the ring 24 becomes larger, and the ring 24 pushes the fixing plate 26 to become shorter in spring property. That is, when the steel balls enter the rubber 25 and are rubbed by the rubber 25 and roll in the semicircular cavity 16, the rubber 25 will radially expand, and these steel balls will not fall from the inner edge of the semicircular cavity 16.

[0035] like Figure 3 , Figure 6 As shown, in another embodiment, a lifting plate 27 is fixed in the top cabin 2, and a lifting hole 28 is opened in the middle of the lifting plate 27. The lifting plate 27 is sleeved on the guide seat 3 through the lifting hole 28. The upper part of the lifting plate 27 forms an upper compartment 29 in the top cabin 2. The steel balls are located in the upper compartment 29. When the lifting plate 27 rises, the height of the steel balls is adjusted. During the actual assembly, another electric cylinder will be installed at the bottom of the lifting plate 27. The electric cylinder is used to push the lifting plate 27 up. The lifting plate 27 pushes the steel balls up. When the assembly seat 7 is reset downward, it is ensured that the steel balls in the upper compartment 29 will be able to effectively cover the assembly seat 7, and ensure that when the assembly seat 7 rises, the semicircular cavity 16 can be used to intercept some steel balls from the upper compartment 29 and assemble them on the casters.

[0036] Note: The servo control system mentioned in the present invention is an inherent technology in automated assembly machines or other automated equipment, and will not be described in detail in the present invention.

[0037] The above orientation designations do not represent the specific orientations of the components in this implementation scheme. This implementation scheme is only for the convenience of describing the scheme, and the orientations are described relatively with reference to the figures. In essence, the specific orientations of the components are described according to their actual installation and actual use as well as the customary orientations of technicians in this field. This is hereby explained.

[0038] The specific implementation methods described above further describe the invention purpose, technical solutions, and beneficial effects of the present invention in detail. It should be understood that the above description is only a specific implementation method of the present invention and is not intended to limit the protection scope of the present invention. It is particularly pointed out that for those skilled in the art, any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A caster automatic assembly machine, characterized in that: The invention comprises a bottom cabin (1), a top cabin (2) is installed on the top of the bottom cabin (1), a guide seat (3) is fixed in the top cabin (2), a large number of steel balls are installed in the top cabin (2), a vertical upward guide hole (4) is opened in the guide seat (3), a guide column (5) is installed in the guide hole (4), an electric cylinder (6) connected to the bottom of the guide column (5) is installed in the bottom cabin (1), the top end of the guide column (5) penetrates to the top of the guide seat (3), an assembly seat (7) is fixed on the top end of the guide column (5), the assembly seat (7) is annular, a steel ball cavity (8) is opened on the top surface of the assembly seat (7), the opening of the steel ball cavity (8) faces upward, the assembly seat (7) can be lifted under the drive of the guide column (5), and the steel ball is assembled to the caster by using the steel ball cavity (8), the guide column (5) is opened with a vertical oil cavity (9), The oil chamber (9) is equipped with a piston (10), the top end of the piston (10) is connected to a piston rod (11), the top end of the piston rod (11) enters above the assembly seat (7), and a pressure seat (12) is installed on the top end of the piston rod (11), the top surface of the pressure seat (12) protrudes from the top surface of the assembly seat (7), a spring (13) is provided between the top end of the pressure seat (12) and the assembly seat (7), and the spring (13) is sleeved on the pressure seat (12); the oil chamber (9) is filled with lubricating oil, and an oil pipe (15) is connected between the oil chamber (9) and the assembly seat (7), and the oil pipe (15) is a plurality of pipes, and the plurality of pipes (15) are distributed in an annular array on the periphery of the guide column (5), and the top ends of the plurality of pipes (15) enter the bottom of the steel ball chamber (8) from the bottom surface of the assembly seat (7).

2. The caster automatic assembly machine according to claim 1, characterized in that: The steel ball cavity (8) is annular, and the cross-sectional shape of the steel ball cavity (8) is composed of a semicircular cavity (16) at the top and a U-shaped cavity (17) at the bottom. A plurality of oil pipes (15) enter the U-shaped cavity (17) from the bottom surface of the assembly seat (7).

3. The caster automatic assembly machine according to claim 2, characterized in that: A countersunk hole (18) is provided at the top of the assembly seat (7), and a spherical surface (19) protruding from the top surface of the assembly seat (7) is provided at the top of the pressure-bearing seat (12). The bottom surface diameter of the spherical surface (19) is larger than the diameter of the pressure-bearing seat (12), and the bottom surface of the spherical surface (19) faces the bottom of the countersunk hole (18). The upper and lower ends of the spring (13) elastically abut between the bottom of the countersunk hole (18) and the bottom surface of the spherical surface (19).

4. The caster automatic assembly machine according to claim 3, characterized in that: A blanking hole (20) is provided on the inner periphery of the assembly seat (7), and a rounded corner (21) is provided on the edge of the blanking hole (20).

5. The caster automatic assembly machine according to claim 4, characterized in that: The top compartment (2) is provided with a replenishing cylinder (22), in which lubricating oil is contained. The replenishing cylinder (22) is located above the oil chamber (9) and higher than the pressure bearing seat (12). The bottom end of the replenishing cylinder (22) is connected to a hose (23), and the other end of the hose (23) extends downward and is connected to the oil chamber (9).

6. The caster automatic assembly machine according to claim 5, characterized in that: A collar (24) is provided in the top cabin (2), the collar (24) being located above the assembly seat (7), a fixing plate (26) being connected between the outer wall of the collar (24) and the inner wall of the top cabin (2), the fixing plate (26) gradually tilting upwards towards one end of the collar (24), the inner diameter of the collar (24) being larger than the outer diameter of the assembly seat (7), the outer diameter of the assembly seat (7) being close to the inner wall of the collar (24), the assembly seat (7) entering the collar (24) during a lifting action, an annular rubber (25) being provided on the inner wall of the collar (24), the inner diameter of the rubber (25) being smaller than the outer diameter of the assembly seat (7), the cross-section of the rubber (25) being an arc, so that the arc-shaped inner surface of the rubber (25) is convex inwards.

7. The caster automatic assembly machine according to claim 6, characterized in that: The fixing plate (26) is a spring plate. When the inner ring of the rubber (25) is squeezed, the squeezing force is transmitted to the sleeve ring (24), so that the diameter of the sleeve ring (24) increases, and the sleeve ring (24) pushes the fixing plate (26) to shorten in a spring manner.

8. The caster automatic assembly machine according to claim 7, characterized in that: A lifting plate (27) is fixed in the top cabin (2), a lifting hole (28) is opened in the middle of the lifting plate (27), the lifting plate (27) is sleeved on the guide seat (3) through the lifting hole (28), an upper compartment (29) is formed in the top cabin (2) above the lifting plate (27), a steel ball is located in the upper compartment (29), and the height of the steel ball is adjusted when the lifting plate (27) rises.

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