A barbell plate peripheral grinding device

Abstract

The present invention discloses a peripheral grinding device for a barbell plate, and relates to the technical field of grinding devices, including a base, a positioning mechanism, a fixing plate, a lifting mechanism, and a lifting plate; a rotating shaft connected to the lifting plate for vertical rotation, a rotating seat being fixedly connected to the lower end of the rotating shaft, and an adjusting mechanism being arranged on the rotating seat; and a grinding mechanism arranged at one end of the adjusting mechanism away from the rotating seat. When the barbell plate is subjected to a large extrusion force from a grinding wheel, the barbell plate will squeeze the expansion shaft, and the outer wall of the expansion shaft will produce elastic contraction deformation, so that the ball rolls on the inner wall of the tapered hole, and then drives the mounting column to move upward, so that the pressure sensor on the mounting column is pressed against the rubber column, and then the pressure sensor generates a pressure signal, and feeds back to the control cabinet, and the control cabinet controls the electromagnet to cut off the power, and the regulating cylinder cannot move to drive the grinding wheel to move, so that when the barbell plate is subjected to a large grinding force, the feed is automatically stopped, and the impact on the life of the grinding wheel is reduced.

Description

Technical Field

[0001] The invention relates to the technical field of grinding devices, in particular to a barbell plate outer periphery grinding device. Background Art

[0002] Barbell is a core training exercise equipment, also used for weightlifting. Barbell exercise is a type of weight training, but it is a training equipment that uses barbells to increase muscle strength. Barbells can also be used for core training to improve overall coordination.

[0003] When the barbell plate is being processed, its outer periphery needs to be polished. During polishing, the motor of the polishing equipment drives the polishing wheel to rotate and polishes around the periphery of the barbell plate. When the existing polishing equipment polishes the periphery of the barbell plate, the feed mechanism drives the polishing wheel to move so that the polishing wheel feeds and completes the polishing operation. However, since the grinding wheel is generally polished after quenching, when the feed amount of the grinding wheel is large, the abrasive grains on the grinding wheel have a large grinding force on the barbell plate, which makes the grinding resistance of the barbell plate to the grinding wheel also large. This results in a significant reduction in the grinding life of the grinding wheel during batch polishing operations. Summary of the invention

[0004] The purpose of the present invention is to provide a barbell plate outer periphery grinding device to solve the problems raised in the above background technology.

[0005] To achieve the above object, the present invention provides the following technical solutions:

[0006] A barbell plate outer periphery grinding device comprises a base and also comprises:

[0007] A positioning mechanism disposed on the base;

[0008] A fixed plate fixedly connected to one end of the base, wherein the fixed plate is provided with a lifting mechanism, and the lifting mechanism is drivingly connected to the lifting plate;

[0009] A rotating shaft vertically connected to the lifting plate, a rotating seat fixedly connected to the lower end of the rotating shaft, an adjusting mechanism provided on the rotating seat, and when the positioning mechanism is subjected to a lateral extrusion force, the adjusting mechanism will be triggered to fail, causing the adjusting mechanism to stop operating;

[0010] A grinding mechanism is arranged at one end of the adjusting mechanism away from the rotating seat.

[0011] Furthermore, the lifting mechanism includes a transverse plate fixedly connected to the upper end of the fixed plate, a lifting cylinder is vertically mounted on the transverse plate, and a telescopic rod of the lifting cylinder is fixedly connected to the lifting plate.

[0012] Furthermore, the grinding mechanism includes a cross arm horizontally penetrated on the rotating seat, the cross arm slides freely horizontally on the rotating seat, the end of the cross arm away from the rotating seat is fixedly connected to a mounting plate, a grinding motor is vertically installed on the top of the mounting plate, the output shaft of the grinding motor is driven and connected to a grinding wheel, a driving motor is installed on the upper surface of the lifting plate, the output shaft of the driving motor and the rotating shaft are each sleeved with a pulley, and the two pulleys are connected by a belt drive.

[0013] Furthermore, the adjustment mechanism includes an adjustment plate fixedly connected to the other end of the cross arm, an adjustment cavity for the adjustment plate to engage is opened in the rotating seat, the adjustment plate slides freely horizontally in the adjustment cavity, an adjustment column is coaxially penetrated on the rotating shaft, the lower end of the adjustment column passes through the adjustment cavity and slides freely, a sliding pin is penetrated at the lower end of the adjustment column, a waist-shaped hole for the sliding pin to be inserted is opened on the adjustment plate, the upper end of the waist-shaped hole in the length direction is inclined and extends radially outward of the adjustment column, an adjustment cylinder is vertically installed on the upper surface of the lifting plate, the cylinder rod of the adjustment cylinder passes through the rotating shaft and is rotatably connected to the adjustment column.

[0014] Furthermore, the positioning mechanism includes an expansion shaft vertically connected to the top surface of the base, the expansion shaft is hollow inside, and a tapered hole is coaxially opened at the upper side opening of the expansion shaft, the inner diameter of the tapered hole decreases successively from top to bottom, and a strip notch passing through the tapered hole is opened at the periphery of the expansion shaft, a fixing ring is coaxially fixed inside the expansion shaft, a sliding shaft is coaxially passed through the fixing ring, a mounting column is coaxially fixed to the upper end of the sliding shaft, a ball is rotatably embedded at the periphery of the mounting column, the ball is in rolling contact with the inner wall of the tapered hole, a reset unit is provided in the expansion shaft, the reset unit is used to drive the sliding shaft to move downward, and a trigger unit is provided on the expansion shaft, the trigger unit is used to trigger the adjustment mechanism to stop the action.

[0015] Furthermore, the reset unit includes a locking ring fixedly sleeved on the lower end of the sliding shaft, a reset spring is sleeved on the sliding shaft, and two ends of the reset spring in the direction of elastic force elastically press against the locking ring and the fixed ring respectively and one by one.

[0016] Furthermore, a gasket is connected to the top of the base, and the gasket is coaxial with the expansion shaft.

[0017] Furthermore, the trigger unit includes a pressure sensor coaxially embedded in the top of the mounting column, a rubber column fixedly connected to the bottom surface of the rotating seat for use with the pressure sensor, a disconnect assembly is provided on the lifting plate, and the disconnect assembly is connected to the pipe interface of the regulating cylinder.

[0018] Furthermore, the disconnect assembly includes a hollow seat connected to the top surface of the lifting plate, the outer wall of one side of the hollow seat is connected to a first connecting pipe, the first connecting pipe is through-connected with the pipe interface of the adjusting cylinder, the outer wall of the other side of the hollow seat is connected to a second connecting pipe, the first connecting pipe, the second connecting pipe are through-connected with the inner cavity of the hollow seat, the inner cavity of the hollow seat is engaged with a piston, and a sealing portion for driving the piston to move up and down is provided in the hollow seat.

[0019] Furthermore, the blocking portion includes an electromagnet installed inside the hollow seat, a magnetic block is embedded in the piston, the magnetic block is used in conjunction with the electromagnet, and a plastic spring is installed inside the hollow seat, and both ends of the plastic spring in the elastic force direction elastically press against the piston and the electromagnet one by one.

[0020] Compared with the prior art, the present invention has the following beneficial effects:

[0021] 1. The present invention arranges that when the barbell piece is subjected to a large extrusion force of the grinding wheel, the barbell piece will squeeze the expansion shaft, and the outer wall of the expansion shaft will produce elastic contraction deformation, so that the ball rolls on the inner wall of the tapered hole, and then drives the mounting column to move upward, so that the pressure sensor on the mounting column is tightly pressed against the rubber column, and then the pressure sensor generates a pressure signal and feeds it back to the control cabinet, and the control cabinet controls the electromagnet to cut off the power, so that the piston moves upward in the fixed seat and blocks the mouth of the first connecting pipe, so that the regulating cylinder cannot take in air, and then the regulating cylinder cannot move to drive the grinding wheel to move, so that when the barbell piece is subjected to a large grinding force, the feed is automatically stopped, and the impact on the life of the grinding wheel is reduced;

[0022] 2. The present invention drives the adjusting column to move downward by setting an adjusting cylinder, so that the adjusting column drives the sliding pin to slide in the waist-shaped hole, and the relative sliding of the sliding pin and the inner wall of the waist-shaped hole causes the adjusting plate to drive the cross arm to move, and then can drive the grinding wheel to move in the direction of the rotating seat, so that the grinding wheel can feed, and the operation is simple. Moreover, since the cylinder rod of the adjusting cylinder is rotatably connected to the adjusting column, the grinding wheel can feed when grinding the barbell plate, and the cylinder rod of the adjusting cylinder will not interfere with the rotation of the adjusting column.

[0023] 3. The present invention provides a reset spring to generate a downward elastic resisting force on the locking ring, so that in the initial state, the locking ring will drive the mounting column to move downward, and the ball will generate a squeezing force on the inner wall of the tapered hole toward the radial outside of the expansion shaft, so that the expansion shaft maintains an elastic expansion deformation, and the expansion shaft and the center hole of the barbell plate are tightly matched, so that the barbell plate can be more securely positioned on the base. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1It is a structural schematic diagram of a barbell plate periphery grinding device in the present invention;

[0025] Figure 2 for Figure 1 A schematic diagram of the structure from a top-down angle;

[0026] Figure 3 for Figure 1 A schematic cross-sectional view of the structure;

[0027] Figure 4 for Figure 3 A magnified schematic diagram of the local structure at point A;

[0028] Figure 5 This is a schematic diagram of the structure after the expansion shaft, the sliding shaft and the mounting column are assembled in the present invention;

[0029] Figure 6 for Figure 5 Schematic diagram of structural explosion decomposition;

[0030] Figure 7 for Figure 5 A schematic cross-sectional view of a part of the structure;

[0031] Figure 8 It is a schematic diagram of the structure after the hollow seat, piston and fixing ring are assembled in the present invention;

[0032] Fig. 9 for Figure 8 Schematic cross-sectional view of the structure.

[0033] In the figure, the description of each figure mark is as follows: 1. base; 2. lifting cylinder; 3. fixing plate; 4. lifting plate; 5. driving motor; 6. hollow seat; 7. adjusting cylinder; 8. rotating shaft; 9. rotating seat; 10. barbell plate; 11. washer; 12. grinding wheel; 13. mounting plate; 14. grinding motor; 15. cross arm; 16. expansion shaft; 17. rubber column; 18. waist-shaped hole; 19. sliding pin; 20. adjusting cavity; 21. adjusting plate; 22. adjusting column; 23. mounting column; 24. pressure sensor; 25. tapered hole; 26. ball; 27. strip notch; 28. fixing ring; 29. ​​sliding shaft; 30. reset spring; 31. locking ring; 32. piston; 33. second connecting pipe; 34. plastic spring; 35. electromagnet; 36. first connecting pipe. DETAILED DESCRIPTION

[0034] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0035] See also Figure 1-Figure 9 The present invention provides a technical solution: a barbell plate outer periphery grinding device, comprising a base 1, a fixing plate 3 is vertically welded at one end in the length direction of the base 1, a horizontal plate extending horizontally toward the outer side of the base 1 is welded at the upper end of the fixing plate 3, a lifting cylinder 2 is vertically installed on the horizontal plate, a telescopic rod of the lifting cylinder 2 penetrates the fixing plate 3 and is fixedly connected with a lifting plate 4, a concave positioning hole is opened on the top surface of the base 1, a connecting plate is clamped and installed in the positioning hole, and the connecting plate is screwed The expansion shaft 16 is vertically welded on the connecting plate. The expansion shaft 16 is hollow inside and has a conical hole 25 coaxially opened on the upper end. The inner diameter of the conical hole 25 decreases from top to bottom. The top screw of the base 1 is connected with a washer 11. The inner hole diameter of the washer 11 is larger than the outer diameter of the expansion shaft 16. The washer 11 is sleeved on the expansion shaft 16. The barbell plate 10 is placed on the top of the washer 11, and the expansion shaft 16 is inserted into the center hole of the barbell plate 10, so as to position the barbell plate 10.

[0036] The periphery of the expansion shaft 16 is provided with a strip-shaped notch 27 penetrating the tapered hole 25. A fixed ring 28 is coaxially fixedly connected inside the expansion shaft 16. A sliding shaft 29 is coaxially passed through the fixed ring 28. A mounting column 23 is coaxially fixedly connected to the upper end of the sliding shaft 29. A ball 26 is rotatably embedded on the periphery of the mounting column 23. The ball 26 rolls in contact with the inner wall of the tapered hole 25. A locking ring 31 is fixedly sleeved on the lower end of the sliding shaft 29. The locking ring 31 can move freely up and down in the expansion shaft 16. A return spring 30 is sleeved around the sliding shaft 29. The elastic force of the return spring 30 is The two ends of the expansion shaft 16 elastically resist the locking ring 31 and the fixing ring 28 one by one, and the reset spring 30 generates a downward elastic resisting force on the locking ring 31, so that the locking ring 31 drives the sliding shaft 29 to move downward, and then the mounting column 23 moves downward, so that the ball 26 squeezes the inner wall of the tapered hole 25. Since the expansion shaft 16 is provided with a strip notch 27, the expansion shaft 16 will be elastically expanded and deformed, so that the expansion shaft 16 and the center hole of the barbell plate 10 are tightly matched and assembled, so that the barbell plate 10 will not rotate on its own;

[0037] A rotating shaft 8 is vertically rotatably connected to the lifting plate 4, a rotating seat 9 is fixedly connected to the lower end of the rotating shaft 8, a cross arm 15 is horizontally penetrated on the outer wall of one side of the rotating seat 9, the cross arm 15 can slide freely horizontally on the rotating seat 9, a mounting plate 13 is fixedly connected to the end of the cross arm 15 away from the rotating seat 9, a grinding motor 14 is vertically installed on the top of the mounting plate 13, the output shaft of the grinding motor 14 is driven and connected to a grinding wheel 12, the shape of the grinding wheel 12 matches the periphery of the barbell plate 10, a driving motor 5 is installed on the upper surface of the lifting plate 4, and the driving motor 5 The output shaft and the rotating shaft 8 are each sleeved with a pulley, and the two pulleys are connected by a belt transmission. The driving motor 5 is powered on and started, thereby driving the pulley connected to the output shaft of the driving motor 5 to rotate, and then through the transmission of the belt, the two pulleys can rotate synchronously, thereby driving the rotating shaft 8 to rotate. When the rotating shaft 8 rotates, it will drive the rotating seat 9 to rotate slowly, so that the grinding wheel 12 can be driven to rotate with the rotating shaft 8 as the axis, so that the grinding wheel 12 can grind the periphery of the barbell plate 10 along the circular motion trajectory;

[0038] An adjustment plate 21 is welded to the other end of the cross arm 15, and an adjustment cavity 20 for engaging the adjustment plate 21 is provided in the rotating seat 9. The adjustment plate 21 slides freely horizontally in the adjustment cavity 20. An adjustment column 22 is coaxially penetrated on the rotating shaft 8. The middle of the adjustment plate 21 is hollowed out, and the lower end of the adjustment column 22 penetrates into the adjustment cavity 20 and slides freely. The lower end of the adjustment column 22 is inserted into the hollow part of the adjustment plate 21, and a sliding pin 19 is penetrated at the lower end of the adjustment column 22. A waist-shaped hole 18 for inserting the sliding pin 19 is provided on the adjustment plate 21, and the upper end of the waist-shaped hole 18 in the length direction faces the adjustment plate 21. The radial outer side of the section column 22 is inclinedly extended, and an adjusting cylinder 7 is vertically installed on the upper surface of the lifting plate 4. The cylinder rod of the adjusting cylinder 7 penetrates the rotating shaft 8 and is rotatably connected with the adjusting column 22. By extending the cylinder rod of the adjusting cylinder 7, the sliding pin 19 is driven to slide in the waist-shaped hole 18, and the sliding pin 19 is slid from the upper end of the waist-shaped hole 18 in the length direction to the lower end thereof in the length direction, so that the adjusting plate 21 can move in the direction away from the grinding wheel 12, that is, by extending the cylinder rod of the adjusting cylinder 7, the grinding wheel 12 is fed.

[0039] The regulating cylinder 7 is connected to an external compressed air pipeline through a pipe interface provided on its outer wall to supply air to the regulating cylinder 7 so that the regulating cylinder 7 can be actuated. That is, a pipe joint is installed on the pipe interface of the regulating cylinder 7, and the pipe joint is connected to the solenoid valve through an air pipe. The air inlet of the solenoid valve is connected to the compressed air pipeline through the air pipe, so that the compressed air in the compressed air pipeline enters the solenoid valve, and then enters the pipe joint through the solenoid valve, and then enters the pipe interface, and finally enters the regulating cylinder 7 to supply air to the regulating cylinder 7 so that the regulating cylinder 7 can be actuated. In this embodiment, a hollow seat 6 is connected to the top surface of the lifting plate 4, and a first connecting pipe 36 is connected to the outer wall of one side of the hollow seat 6. The first connecting pipe 36 is connected to one of the pipe interfaces of the regulating cylinder 7. The pipe joint on the mouth is connected through, the outer wall of the other side of the hollow seat 6 is connected with a second connecting pipe 33, the second connecting pipe 33 is connected to the solenoid valve, the first connecting pipe 36 and the second connecting pipe 33 are connected with the inner cavity of the hollow seat 6, the inner cavity of the hollow seat 6 is engaged with a piston 32, the inner bottom wall of the hollow seat 6 is connected with an electromagnet 35, a magnetic conductive block (made of any material of iron, cobalt and nickel) is embedded in the piston 32, the magnetic conductive block is used in conjunction with the electromagnet 35, and a plastic spring 34 is installed in the hollow seat 6, the two ends of the plastic spring 34 in the elastic force direction respectively correspond to each other elastically against the piston 32 and the electromagnet 35, a pressure sensor 24 is embedded on the top of the mounting column 23, and a rubber column 17 used in conjunction with the pressure sensor 24 is fixed to the bottom surface of the rotating seat 9;

[0040] In the initial state, the electromagnet 35 is energized, and the electromagnet 35 will generate magnetism when energized, thereby exerting a magnetic attraction on the magnetic block, so that the magnetic block drives the piston 32 to move downward in the hollow seat 6, and the plastic spring 34 is squeezed by the piston 32 to accumulate elastic potential energy, so that the piston 32 will not block the pipe openings of the first connecting pipe 36 and the second connecting pipe 33, so that the first connecting pipe 36 and the second connecting pipe 33 are in a through state. In this way, after the compressed air enters the solenoid valve, the solenoid valve is started, and the compressed air will enter the hollow seat 6 from the second connecting pipe 33, and then enter a pipe interface of the regulating cylinder 7 from the first connecting pipe 36, and finally enter the regulating cylinder 7 to supply air to the regulating cylinder 7. As is known to all, the working principle of the cylinder is that the two pipe interfaces of the cylinder alternately supply air to the inside of the cylinder sleeve, so that the pressure of the two cavities in the cylinder sleeve changes, and then drives the cylinder plug to slide in the cylinder sleeve, so that the cylinder rod of the cylinder is extended and retracted. Therefore, In this embodiment, when the expansion shaft 16 is subjected to a large squeezing force from the barbell plate 10, since the expansion shaft 16 is in a stationary state relative to the base 1, the expansion shaft 16 produces an elastic contraction deformation, thereby causing the ball 26 to slide on the inner wall of the tapered hole 25 of the expansion shaft 16, so that the ball 26 drives the mounting column 23 to move upward, so that the pressure sensor 24 is pressed against the rubber column 17, and the pressure sensor 24 generates a pressure signal, which is fed back to the external control cabinet. The control cabinet quickly disconnects the power supply of the electromagnet 35, and the electromagnet 35 loses its magnetism after power is cut off. At this time, the plastic spring 34 has elastic potential energy and drives the piston 32 to move upward quickly in the hollow seat 6, thereby causing the piston 32 to block the pipe openings of the first connecting pipe 36 and the second connecting pipe 33, so that the compressed air cannot enter the adjusting cylinder 7, thereby causing the adjusting cylinder 7 to be unable to extend the cylinder rod, thereby causing the adjusting cylinder 7 to be unable to perform the feed operation, so that the grinding wheel 12 maintains the current grinding radius.

[0041] The working principle of the present invention is as follows: the barbell plate 10 is placed on the top of the washer 11, and the expansion shaft 16 is inserted into the center hole of the barbell plate 10, so as to position the barbell plate 10, and the reset spring 30 generates a downward elastic resisting force on the locking ring 31, so that the locking ring 31 drives the sliding shaft 29 to move downward, and then the mounting column 23 moves downward, so that the ball 26 squeezes the inner wall of the tapered hole 25, and because the expansion shaft 16 is provided with a strip notch 27, the expansion shaft 16 will be elastically expanded and deformed, so that the expansion shaft 16 and the center hole of the barbell plate 10 are tightly matched and assembled, so that the barbell plate 10 will not rotate by itself;

[0042] The telescopic rod of the lifting cylinder 2 is shortened, and drives the lifting plate 4 to move downward, so that the bottom surface of the rubber column 17 at the bottom of the rotating seat 9 contacts the pressure sensor 24, and at this time the rubber column 17 will not generate pressure on the pressure sensor 24, and the pressure sensor 24 will not generate a pressure signal, and the grinding motor 14 is started, and the grinding motor 14 drives the grinding wheel 12 to rotate. At this time, the grinding radius of the grinding wheel 12 is greater than the radius of the barbell plate 10, and then the regulating cylinder 7 is started, and the solenoid valve is actuated, so that the air path corresponding to the pipe interface of the regulating cylinder 7 air intake is in a passage state, so that the compressed air can enter the regulating cylinder 7 through the solenoid valve, so that the cylinder rod of the regulating cylinder 7 is extended, and the air inlet The sliding pin 19 is driven to slide in the waist-shaped hole 18. The adjusting cylinder 7 in this embodiment is a cylinder with adjustable stroke in the prior art, and this type of cylinder is already a relatively mature component. Therefore, in this embodiment, the stroke of the cylinder rod of the adjusting cylinder 7 can be adjusted, so that the sliding stroke of the sliding pin 19 in the waist-shaped hole 18 can be adjusted. When the sliding pin 19 slides in the waist-shaped hole 18, it will drive the adjusting plate 21 to move away from the grinding wheel 12, so that the cross arm 15 drives the mounting plate 13 to move toward the direction adjacent to the rotating seat 9, thereby reducing the grinding radius of the grinding wheel 12, so that the grinding wheel 12 starts to perform the feed operation;

[0043] The grinding wheel 12 is engaged with the periphery of the barbell plate 10, and the grinding wheel 12 is driven to rotate by the grinding motor 14, so that the grinding wheel 12 can grind the periphery of the barbell plate 10, and because the grinding wheel 12 can perform cutting, the grinding radius of the grinding wheel 12 can be continuously reduced. Since the barbell plate 10 is in a quenched state, its surface hardness is relatively large. If the single cutting amount of the grinding wheel 12 is large, the grinding resistance of the grinding wheel 12 by the barbell plate 10 is also large, so that the barbell plate 10 is subjected to the extrusion force of the grinding wheel 12, and the wall of the central hole of the barbell plate 10 will produce a large unilateral extrusion force on the expansion shaft 16, so that the expansion shaft 16 will produce elastic contraction deformation after being subjected to the extrusion force, so that the ball 26 and the inner wall of the tapered hole 25 slide relative to each other;

[0044] Since the expansion shaft 16 is in a stationary state relative to the base 1, the expansion shaft 16 produces elastic contraction deformation, so that the ball 26 slides on the inner wall of the tapered hole 25 of the expansion shaft 16, so that the ball 26 drives the mounting column 23 to move upward, so that the pressure sensor 24 is pressed against the rubber column 17, and the pressure sensor 24 generates a pressure signal and feeds it back to the external control cabinet. The control cabinet quickly disconnects the power supply of the electromagnet 35, and the electromagnet 35 loses its magnetism after power is cut off. At this time, the plastic spring 34 has elastic potential energy and drives the piston 32 to move upward quickly in the hollow seat 6, so that the active The plug 32 blocks the openings of the first connecting pipe 36 and the second connecting pipe 33, so that the compressed air cannot enter the regulating cylinder 7, and the regulating cylinder 7 cannot extend the cylinder rod, and the regulating cylinder 7 cannot feed the tool, so that the grinding wheel 12 maintains the current grinding radius until the grinding resistance of the grinding wheel 12 within the grinding radius is reduced, so that the extrusion force on the expansion shaft 16 disappears or decreases, and then the return spring 30 elastically resists the locking ring 31, so that the sliding shaft 29 and the mounting column 23 move downward, so that the ball 26 exerts pressure on the expansion shaft 16. The expansion shaft 16 is compressed along the radial outer side, and the expansion shaft 16 is transformed from elastic contraction to elastic expansion, so that the expansion shaft 16 is deformed again, which makes the pressure sensor 24 out of the state of being against the rubber column 17, so that the pressure signal of the pressure sensor 24 disappears, and the external control cabinet cannot collect the pressure signal, and then the control electromagnet 35 is energized. When the electromagnet 35 is energized, the electromagnet 35 will generate magnetism, and then have a magnetic attraction to the magnetic block, so that the magnetic block drives the piston 32 to move downward in the hollow seat 6, and the plastic spring 34 is squeezed by the piston 32 to accumulate elastic potential energy, so that the piston 32 will not block the pipe openings of the first connecting pipe 36 and the second connecting pipe 33, so that the first connecting pipe 36 and the second connecting pipe 33 are in a through state. In this way, after the compressed air enters the solenoid valve, the solenoid valve is started, and the compressed air will enter the hollow seat 6 from the second connecting pipe 33, and then enter a pipe interface of the regulating cylinder 7 from the first connecting pipe 36, and finally enter the regulating cylinder 7 to supply air to the regulating cylinder 7, so that the regulating cylinder 7 can continue to move to complete the feeding operation of the grinding wheel 12;

[0045] After grinding is completed, the cylinder rod of the adjusting cylinder 7 is quickly shortened, and drives the sliding pin 19 to quickly slide in the opposite direction in the waist-shaped hole 18, thereby driving the adjusting plate 21 to move in the direction close to the grinding wheel 12, so that the grinding wheel 12 quickly moves away from the barbell plate 10 whose periphery has been grinded, and then the worker lifts the barbell plate 10, and then separates the barbell plate 10 from the expansion shaft 16, completing the unloading after grinding.

[0046] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations may be made to these embodiments without departing from the principles and spirit of the present invention, and the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A barbell plate outer periphery grinding device, comprising a base (1), characterized in that: Also includes: A positioning mechanism provided on the base (1); A fixed plate (3) fixedly connected to one end of the base (1), the fixed plate (3) being provided with a lifting mechanism, and the lifting mechanism being drivingly connected to a lifting plate (4); A rotating shaft (8) vertically rotatably connected to the lifting plate (4), the lower end of the rotating shaft (8) being fixedly connected to a rotating seat (9), the rotating seat (9) being provided with an adjusting mechanism, and when the positioning mechanism is subjected to a lateral squeezing force, the adjusting mechanism will be triggered to fail, causing the adjusting mechanism to stop operating; a grinding mechanism disposed at an end of the adjusting mechanism away from the rotating seat (9); The grinding mechanism comprises a cross arm (15) horizontally penetrated on the rotating seat (9), the cross arm (15) slides freely horizontally on the rotating seat (9), one end of the cross arm (15) away from the rotating seat (9) is fixedly connected to a mounting plate (13), a grinding motor (14) is vertically mounted on the top of the mounting plate (13), the output shaft of the grinding motor (14) is drivingly connected to a grinding wheel (12), a driving motor (5) is mounted on the upper surface of the lifting plate (4), the output shaft of the driving motor (5) and the rotating shaft (8) are respectively sleeved with pulleys, and the two pulleys are connected by a belt drive; The adjustment mechanism comprises an adjustment plate (21) fixedly connected to the other end of the cross arm (15); an adjustment cavity (20) for engaging the adjustment plate (21) is provided in the rotating seat (9); the adjustment plate (21) slides freely horizontally in the adjustment cavity (20); an adjustment column (22) is coaxially penetrated on the rotating shaft (8); the lower end of the adjustment column (22) penetrates into the adjustment cavity (20) and slides freely; a sliding pin (19) is penetrated at the lower end of the adjustment column (22); a waist-shaped hole (18) for inserting the sliding pin (19) is provided on the adjustment plate (21); the upper end of the waist-shaped hole (18) in the length direction extends obliquely toward the radial outer side of the adjustment column (22); an adjustment cylinder (7) is vertically mounted on the upper surface of the lifting plate (4); the cylinder rod of the adjustment cylinder (7) penetrates into the rotating shaft (8) and is rotationally connected to the adjustment column (22); The positioning mechanism comprises an expansion shaft (16) vertically connected to the top surface of the base (1), the expansion shaft (16) is hollow inside, and a conical hole (25) is coaxially opened at the upper side opening of the expansion shaft (16), the inner diameter of the conical hole (25) decreases from top to bottom, a strip-shaped notch (27) is opened on the periphery of the expansion shaft (16) and passes through the conical hole (25), a fixing ring (28) is coaxially fixed inside the expansion shaft (16), and a fixing ring (28) is coaxially passed through the fixing ring (28) A sliding shaft (29) is provided, the upper end of the sliding shaft (29) is coaxially fixedly connected with a mounting column (23), a ball (26) is rotatably embedded in the periphery of the mounting column (23), the ball (26) is in rolling contact with the inner wall of the tapered hole (25), a reset unit is provided in the expansion shaft (16), the reset unit is used to drive the sliding shaft (29) to move downward, and a trigger unit is provided on the expansion shaft (16), the trigger unit is used to trigger the adjustment mechanism to stop action; The trigger unit comprises a pressure sensor (24) coaxially embedded in the top of the mounting column (23); a rubber column (17) used in conjunction with the pressure sensor (24) is fixedly connected to the bottom surface of the rotating seat (9); a disconnecting assembly is provided on the lifting plate (4); the disconnecting assembly is in communication with the pipe interface of the regulating cylinder (7); The disconnection assembly comprises a hollow seat (6) connected to the top surface of the lifting plate (4); a first connecting pipe (36) is connected to an outer wall of one side of the hollow seat (6); the first connecting pipe (36) is in communication with a pipe interface of the regulating cylinder (7); a second connecting pipe (33) is connected to an outer wall of the other side of the hollow seat (6); the first connecting pipe (36) and the second connecting pipe (33) are in communication with an inner cavity of the hollow seat (6); a piston (32) is engaged in the inner cavity of the hollow seat (6); and a blocking portion for driving the piston (32) to move up and down is provided in the hollow seat (6); The blocking portion comprises an electromagnet (35) installed inside the hollow seat (6), a magnetic conductive block is embedded inside the piston (32), the magnetic conductive block is used in conjunction with the electromagnet (35), and a plastic spring (34) is installed inside the hollow seat (6), with the two ends of the plastic spring (34) in the elastic force direction elastically pressing against the piston (32) and the electromagnet (35) respectively and one by one.

2. The barbell plate outer periphery grinding device according to claim 1, characterized in that: The lifting mechanism comprises a transverse plate fixedly connected to the upper end of the fixed plate (3), a lifting cylinder (2) being vertically mounted on the transverse plate, and a telescopic rod of the lifting cylinder (2) being fixedly connected to the lifting plate (4).

3. The barbell plate outer periphery grinding device according to claim 1, characterized in that: The reset unit comprises a locking ring (31) fixedly sleeved on the lower end of the sliding shaft (29), a reset spring (30) sleeved on the sliding shaft (29), and two ends of the reset spring (30) in the direction of elastic force respectively and elastically press against the locking ring (31) and the fixing ring (28) in a one-to-one correspondence.

4. The barbell plate outer periphery grinding device according to claim 1, characterized in that: A washer (11) is connected to the top of the base (1), and the washer (11) is coaxial with the expansion shaft (16).

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