A trolley mechanism for replacing grinding wheels on a spindle

Abstract

The invention discloses a trolley mechanism for replacing a grinding wheel of a spindle, comprising: a trolley, a loading and unloading mechanism is arranged on the top of the trolley, the loading mechanism is used to load the removed old grinding wheel, the loading and unloading mechanism is arranged on one side of the top of the trolley, a sand loading mechanism is arranged on the top of the trolley, the sand loading mechanism is located on one side of the loading and unloading mechanism, the sand loading mechanism is used to store abrasives used to manufacture the grinding wheel, a screening component is arranged on the top of the sand loading mechanism, the screening component is used to screen out stone particles in the abrasives, a barrel is turned over 90 degrees by a handle to facilitate loading the replaced old grinding wheel into the inside of the barrel, and then the barrel is reset by the handle, after which the output end of the first cylinder returns to the bottom of the barrel to provide supporting force for the barrel, and when it is moved to a processing workshop and the old grinding wheel needs to be unloaded for processing in the processing workshop, the above operation is reversed to turn the barrel over 90 degrees for convenient unloading.

Description

Technical Field

[0001] The present invention relates to the technical field of intelligent manufacturing equipment, and in particular to a trolley mechanism for replacing a grinding wheel on a spindle. Background Art

[0002] A grinding machine is a common device used to sharpen various knives and tools. It is also used for grinding, deburring and cleaning ordinary small parts. It is mainly composed of a base, a grinding wheel, an electric motor or other power source, a bracket, a protective cover and a water feeder. It can be divided into handheld grinders, vertical grinders, suspended grinders, desktop grinders, etc., and is widely used in intelligent manufacturing.

[0003] Grinding wheel, also known as bonded abrasive, is a bonded abrasive made of ordinary abrasives bonded into a certain shape (mostly round with a through hole in the center) with a certain strength. The abrasive is usually sand or silicon carbide. The grinding wheel is generally composed of abrasive, bond and pores. After the grinding wheel of the grinding machine spindle is replaced, the old grinding wheel is removed and loaded on a cart. At the same time, the cart is provided with a placement box, and the new grinding wheel is stored inside the placement box.

[0004] The existing Chinese utility model patent with publication number CN215752561U discloses a sand and gravel transport trolley which is easy to load and unload, including a trolley body, a mounting groove is provided on the top of the trolley body, and first connecting seats are installed at the front and rear ends of the bottom of the inner wall of the mounting groove, a universal wheel is installed at the center of the left bottom of the trolley body, a reducer is installed at the center of the right inside of the trolley body, a brushless motor is installed on the right side of the reducer, and the front and rear ends of the reducer are penetrated by connecting shafts at both ends, and driving wheels are installed on the right sides of the front and rear ends of the trolley body. The utility model sets a universal wheel at the bottom of the trolley body to cooperate with the driving wheel driven by the reducer and the brushless motor, which is steered and adjusted by the universal wheel, and the controller panel controls the electric rotation and movement of the driving wheel, which is convenient for labor-saving hand-pushing the overall device to transport and carry sand and gravel.

[0005] The existing Chinese invention patent with publication number CN111331112A discloses a sand mold trolley for casting, including a steering connection assembly, which includes a connecting ear arranged on a disc sleeve, the connecting ear is arranged along the radial direction of the circular turntable, and an A connecting buckle is installed on the connecting ear. The A connecting buckle is rotatably transferred to the connecting ear and constitutes a hinge shaft and a lifting shaft that are vertically arranged for a rotating assembly connection. The upper end of the lifting rod is connected to the B connecting buckle, and the A connecting buckle and the B connecting buckle are interlocked. By adopting the above scheme to form a specific implementation form of the steering connection assembly, it is beneficial to improve the adaptability of the connection structure between the lifting rod and the disc sleeve to different working conditions, and it is also convenient for maintenance and replacement.

[0006] However, the above patent has the following defects when used in practice:

[0007] (1) Since the sand needs to be screened when it is used, the existing wheelbarrow can transport the sand, but cannot screen the stone particles in the sand, resulting in the need to screen the sand separately after unloading, which is time-consuming and laborious;

[0008] (2) The existing carts cannot limit the position of materials (sand molds) when transporting them. The carts may bump during transportation due to road conditions, which may cause vibrations that may cause the materials to collide with each other and become damaged. Summary of the invention

[0009] The object of the present invention is to provide a trolley mechanism for replacing a grinding wheel on a spindle to solve the problems raised in the above-mentioned background technology.

[0010] In order to achieve the above-mentioned purpose, the present invention adopts the following technical scheme: a trolley mechanism for replacing a grinding wheel on a spindle, comprising: a trolley, a loading and unloading mechanism is arranged on the top of the trolley, the loading mechanism is used to load the removed old grinding wheel, the loading and unloading mechanism is arranged on one side of the top of the trolley, a sand loading mechanism is arranged on the top of the trolley, the sand loading mechanism is located on one side of the loading and unloading mechanism, the sand loading mechanism is used to store abrasives for manufacturing grinding wheels, a screening component is arranged on the top of the sand loading mechanism, and the screening component is used to screen out stone particles in the abrasives;

[0011] The loading and unloading mechanism comprises:

[0012] A support column is welded on both sides of the cart, the top of the support column is rotatably connected to a support frame, a barrel is fixed on the top of the support frame, a handle is fixed on the outside of the support frame, and a first cylinder is fixed on the support column. The output end of the first cylinder in the initial state is located at the bottom of the barrel to provide support force for it.

[0013] The barrel can be turned 90 degrees by a handle to facilitate loading and unloading.

[0014] As a preferred embodiment of the present invention, the sand loading mechanism comprises:

[0015] A material box, the material box is fixed on the top of the cart and on one side of the loading and unloading mechanism, the interior of the material box is provided with a first chamber and a second chamber, the top of the material box is provided with a first feed port and a second feed port, the first feed port is communicated with the first chamber, and the second feed port is communicated with the second chamber

[0016] The first chamber is used to store the screened abrasive, and the second chamber is used to collect the stone particles screened from the abrasive.

[0017] As a preferred solution of the present invention, the material box is equipped with a drive assembly, and the drive assembly includes:

[0018] A double-shaft motor is installed on the outside of the material box by bolts. A support block is provided on the top of the material box. A first rod is rotatably connected inside the support block. A first gear is fixed to one end of the first rod.

[0019] A stirring blade, the stirring blade is rotatably arranged inside the first chamber, and the shaft at the center of the stirring blade is fixedly connected to the other output end of the dual-shaft motor,

[0020] One end of the dual-axis motor drives the first rod and the first gear to rotate through a belt transmission.

[0021] As a preferred embodiment of the present invention, the screening assembly comprises:

[0022] A support frame is located at the top of the material box, the top of the material box is rotatably connected to a second cylinder, a support rod is fixed to the top of the material box, a screen drum is rotatably connected inside the support frame, the screen drum is used to screen the abrasive to be loaded on the cart, and screen holes are evenly distributed outside the screen drum.

[0023] A discharge hopper is installed at the bottom of the support frame to discharge the screened abrasive. A circle of teeth is arranged on the outside of one end of the screen cylinder. A cylinder cover with electric control opening and closing is arranged on one end of the screen cylinder. The first gear meshes with the teeth.

[0024] One end of the support frame is rotatably connected to the output end of the second cylinder, and the other end of the support frame is rotatably connected to the top of the support rod.

[0025] As a preferred embodiment of the present invention, an anti-blocking component is provided on the top of the screen drum, and the anti-blocking component includes:

[0026] The backing plate is fixed to the top of the screen drum through a vertical rod, the bottom of the vertical rod is welded to the top of the material box, the inside of the backing plate is rotatably connected to a second rod, one end of the second rod is fixed to a second gear, the second gear is meshed with the teeth, and a cam is fixed to the outside of the second rod.

[0027] The first spring is fixed on the top of the backing plate, and a transverse plate is fixed on the top of the first spring, and a top block is fixed on the bottom of the transverse plate.

[0028] As a preferred embodiment of the present invention, a storage box is fixed on the top of the cart, a box cover is provided on the top of the storage box, a limiting mechanism is provided inside the storage box, the storage box is used to store new grinding wheels, and the limiting mechanism is used to limit the new grinding wheels in the storage box.

[0029] As a preferred solution of the present invention, the limiting mechanism includes:

[0030] The third cylinder is rotatably arranged at the bottom of the placement box, the bottom of the placement box is rotatably connected with a slide bar, the outside of the slide bar is slidably connected with a slider, the output end of the third cylinder is rotatably connected with the slider, and the bottom of the slide bar is fixed with a first pressure rod,

[0031] A second pressure rod, wherein the second pressure rod is rotatably connected to the end of the sliding rod, one end of the second pressure rod is rotatably connected to a connecting rod, and one end of the connecting rod is rotatably connected to the sliding block,

[0032] Among them, a protective plate is fixed inside the placement box, and the protective plate is slidably connected to a support plate through a set slide groove. A second spring is arranged inside the slide groove, and one end of the second spring is fixedly connected to the support plate.

[0033] As a preferred solution of the present invention, the bottoms of the first chamber and the second chamber are both inclined to facilitate material discharge, the first chamber is provided with a first outlet, and the second chamber is provided with a second outlet.

[0034] As a preferred solution of the present invention, the top block passes through the transverse plate, the top block corresponds to the sieve holes one by one, and the diameter of the top block is smaller than the diameter of the sieve holes.

[0035] As a preferred solution of the present invention, a vertical rod is fixed to the bottom of the box cover, a slot is fixed to the bottom of the vertical rod, and a fourth cylinder is fixedly installed inside the placement box.

[0036] The beneficial effects of the present invention are:

[0037] 1. When the grinding wheel of the grinding machine needs to be replaced, the cart moves to the position of the grinding machine, and then the output end of the first cylinder leaves the bottom of the barrel. At this time, the barrel can move, and then the barrel is turned 90 degrees by the handle to facilitate the installation of the replaced old grinding wheel into the inside of the barrel, and then the barrel is reset by the handle. After that, the output end of the first cylinder returns to the bottom of the barrel to provide support for the barrel. When it is moved to the processing workshop and the old grinding wheel needs to be unloaded, the above operation is reversed to turn the barrel 90 degrees for easy unloading.

[0038] 2. When the screen drum rotates, the teeth will drive the second gear to rotate and then drive the second rod and the cam to rotate. When the cam rotates, it presses the cross plate. At this time, the top block drops and the first spring is compressed. When the cam is not in contact with the cross plate, the first spring resets and lifts the cross plate and the top block, which is conducive to realizing the rotational force of the screen drum to drive the top block to rise and fall. When the top block drops, it passes through the screen hole, which is conducive to preventing the screen hole from being blocked.

[0039] 3. After the grinding wheel is put in, the output end of the third cylinder extends out, and then the slide rod and the first pressure rod rotate toward the top plate and press the top plate, and then the top plate moves in the slide groove to compress the second spring, which is conducive to supporting the side of the grinding wheel through the movement of the top plate. At the same time, when the output end of the third cylinder extends out, the slider will move outside the slide rod. When the slider moves, the second pressure rod will rotate through the connecting rod. When the second pressure rod rotates, it is conducive to supporting the other side of the grinding wheel. At this time, the four reverse directions of the grinding wheel are all restricted, which is conducive to preventing the grinding wheels from colliding and being damaged when the road is bumpy. BRIEF DESCRIPTION OF THE DRAWINGS

[0040] Figure 1 It is a schematic diagram of the overall structure proposed by the present invention;

[0041] Figure 2 This is a schematic diagram of the internal structure of the material box proposed by the present invention;

[0042] Figure 3 It is a schematic diagram of the screen drum structure proposed by the present invention;

[0043] Figure 4 A schematic diagram of the structure of the present invention;

[0044] Figure 5 The present invention proposes Figure 1 Schematic diagram of local structure;

[0045] Figure 6 This is a top view of the interior of the storage box proposed by the present invention;

[0046] Figure 7 This is a schematic diagram of the structure of location B proposed by the present invention;

[0047] Figure 8 The present invention proposes Figure 6 Schematic diagram of local structure;

[0048] Fig. 9 This is a schematic diagram of the bottom structure of the box cover proposed by the present invention.

[0049] In the figure: 11, cart;

[0050] 2. Loading and unloading mechanism; 21. Support column; 22. Support frame; 23. Barrel; 24. Handle; 25. First cylinder;

[0051] 3. Sand loading mechanism; 31. Material box; 32. First chamber; 33. Second chamber; 34. First feed inlet; 35. Second feed inlet; 36. First outlet; 37. Second outlet;

[0052] 4. Screening assembly; 41. Support frame; 42. Second cylinder; 43. Support rod; 44. Screen cylinder; 45. Screen hole; 46. Discharge hopper; 47. Teeth; 48. Cylinder cover;

[0053] 5. driving assembly; 51. dual-axis motor; 52. support block; 53. first rod; 54. first gear; 55. stirring blade;

[0054] 6. Anti-blocking assembly; 61. Backing plate; 62. Second rod; 63. Second gear; 64. Cam; 65. First spring; 66. Cross plate; 67. Top block; 7. Limiting mechanism;

[0055] 71, third cylinder; 72, slide bar; 73, slide block; 74, first pressure bar; 75, second pressure bar; 76, connecting rod; 77, protective plate; 78, stop plate; 79, second spring;

[0056] 12. Place the box;

[0057] 13. Box cover;

[0058] 14. Vertical pole;

[0059] 15. Slot;

[0060] 16. Fourth cylinder. DETAILED DESCRIPTION

[0061] 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.

[0062] In the description of the present invention, it should be noted that the orientation or positional relationship indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inside", "outside", etc. is based on the orientation or positional relationship shown in the drawings, which is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", and "third" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance. In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", and "set" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected, or indirectly connected through an intermediate medium, or it can be the internal connection of two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances. The following is an explanation of its embodiments based on the overall structure of the present invention.

[0063] A cart mechanism for replacing a grinding wheel on a spindle, comprising: a cart 11, a loading and unloading mechanism 2 is arranged on the top of the cart 1, the loading and unloading mechanism 2 is used to load the removed old grinding wheel, the loading and unloading mechanism 2 is arranged on one side of the top of the cart 11, a sand loading mechanism 3 is arranged on the top of the cart 11, the sand loading mechanism 3 is located on one side of the loading and unloading mechanism 2, the sand loading mechanism 3 is used to store abrasives for manufacturing grinding wheels, a screening component 4 is arranged on the top of the sand loading mechanism 3, the screening component 4 is used to screen stone particles in the abrasive In addition, the loading and unloading mechanism 2 includes a support column 21, which is welded on both sides of the cart 1. The top of the support column 21 is rotatably connected to a support frame 22. A barrel 23 is fixed on the top of the support frame 22. A handle 24 is fixed on the outside of the support frame 22. A first cylinder 25 is fixed to the support column 21. The output end of the first cylinder 25 in the initial state is located at the bottom of the barrel 23 to provide support for it. The barrel 23 is turned 90 degrees by the handle 24, which is convenient for loading and unloading.

[0064] The above working principle is: when the grinding wheel of the grinding machine needs to be replaced, the cart 1 moves to the position of the grinding machine, and then the output end of the first cylinder 25 leaves the bottom of the barrel 23, and the barrel 23 can move at this time, and then the barrel 23 is turned over 90 degrees through the handle 24, so that the replaced old grinding wheel can be loaded into the inside of the barrel 23, and then the barrel 23 is reset through the handle 24, and then the output end of the first cylinder 25 returns to the bottom of the barrel 23 to provide support for the barrel 23. When it is moved to the processing workshop (the processing workshop is convenient for processing the old grinding wheel) and the old grinding wheel needs to be unloaded, the above operation is reversed to turn the barrel 23 90 degrees for easy unloading.

[0065] The sand loading mechanism 3 includes a material box 31, which is fixed on the top of the cart 1 and on one side of the loading and unloading mechanism 2. A first chamber 32 and a second chamber 33 are provided inside the material box 31. A first feed port 34 and a second feed port 35 are provided on the top of the material box 31. The first feed port 34 is connected to the first chamber 32, and the second feed port 35 is connected to the second chamber 33. The bottoms of the first chamber 32 and the second chamber 33 are both inclined and convenient for discharging. The first chamber 32 is provided with a first outlet 36, and the second chamber 33 is provided with a second outlet 37. The first chamber 32 is used to store the screened abrasive, and the second chamber 33 is used to collect the stone particles screened from the abrasive.

[0066] In this embodiment, the abrasive from which the stone particles have been screened out is discharged from the discharge hopper 46, and then falls into the interior of the first chamber 32 through the first feed port 34, which is conducive to completing the collection of the screened abrasive. The stone particles in the abrasive will remain in the interior of the sieve drum 44. At this time, the output end of the second cylinder 42 extends out, and then the sieve drum 44 tilts toward the second feed port 35, and then the drum cover 48 is opened. Under the effect of the tilt, the stone particles are discharged from the sieve drum 44 and fall into the interior of the second chamber 33 through the second feed port 35 to complete the recovery.

[0067] The material box 31 is installed with a driving assembly 5, and the driving assembly 5 includes a double-axis motor 51, and the double-axis motor 51 is installed on the outside of the material box 31 by bolts. A support block 52 is arranged on the top of the material box 31, and a first rod 53 is rotatably connected inside the support block 52, and a first gear 54 is fixed at one end of the first rod 53. The stirring blade 55 is rotatably arranged inside the first chamber 32, and the shaft at the center of the stirring blade 55 is fixedly connected to the other output end of the double-axis motor 51. One end of the double-axis motor 51 drives the first rod 53 and the first gear 54 to rotate by belt transmission.

[0068] In this embodiment: the dual-axis motor 51 is started and then drives the first rod 53 to rotate by belt transmission. When the first rod 53 rotates, it drives the first gear 54 to rotate. The first gear 54 is engaged with the teeth 47, so when the first gear 54 rotates, it drives the screen drum 44 to rotate through the teeth 47. At the same time, the dual-axis motor 51 is started to drive the stirring blade 55 to rotate. When the stirring blade 55 rotates, the abrasive is turned over to make it flow, thereby preventing the abrasive that enters the first chamber 32 after screening from accumulating and being unable to be discharged from the first outlet 36.

[0069] The screening assembly 4 includes a support frame 41, which is located at the top of the material box 31. The top of the material box 31 is rotatably connected to the second cylinder 42. A support rod 43 is fixed to the top of the material box 31. A screen drum 44 is rotatably connected inside the support frame 41. The screen drum 44 is used to screen the abrasive to be loaded on the cart. Screen holes 45 are evenly distributed on the outside of the screen drum 44. The discharge hopper 46 is installed at the bottom of the support frame 41 to discharge the screened abrasive. A circle of teeth 47 is provided on the outside of one end of the screen drum 44. A cylinder cover 48 with electric control for opening and closing is provided at one end of the screen drum 44. The first gear 54 is meshed with the teeth 47. One end of the support frame 41 is rotatably connected to the output end of the second cylinder 42, and the other end of the support frame 41 is rotatably connected to the top of the support rod 43.

[0070] In this embodiment, the cart can also transport abrasives to a grinding wheel processing workshop. At the abrasive stacking site, workers use a shovel to put the abrasives into the screen drum 44 from the end away from the drum cover 48. The first gear 54 rotates to drive the screen drum 44 to rotate, and the speed of the screen drum 44 is reduced under the action of the reducer. The abrasive passes through the screen hole 45 and is discharged from the discharge hopper 46 through the rotation, and the stone particles inside the abrasive continue to remain in the screen drum 44.

[0071] The top of the sieve drum 44 is provided with an anti-blocking assembly 6, and the anti-blocking assembly 6 includes a pad 61, and the pad 61 is fixed to the top of the sieve drum 44 through a vertical rod, and the bottom of the vertical rod is welded to the top of the material box 31. The inside of the pad 61 is rotatably connected with a second rod 62, and a second gear 63 is fixed to one end of the second rod 62, and the second gear 63 is meshed with the teeth 47. A cam 64 is fixed to the outside of the second rod 62, and the first spring 65 is fixed to the top of the pad 61, and a cross plate 66 is fixed to the top of the first spring 65, and a top block 67 is fixed to the bottom of the cross plate 66, and the top block 67 passes through the cross plate 66, and the top block 67 corresponds to the sieve hole 45 one by one, and the diameter of the top block 67 is smaller than the diameter of the sieve hole 45.

[0072] In this embodiment: when the screen drum 44 rotates, the second gear 63 is driven to rotate under the action of the teeth 47, and then the second rod 62 and the cam 64 are driven to rotate. When the cam 64 rotates, it presses the cross plate 66. At this time, the top block 67 descends and the first spring 65 is compressed. When the cam 64 is not in contact with the cross plate 66, the first spring 65 is reset to raise the cross plate 66 and the top block 67, which is conducive to realizing the rotational force of the screen drum 44 to drive the top block 67 to rise and fall. When the top block 67 descends, it passes through the screen hole 45, which is conducive to preventing the screen hole 45 from being blocked.

[0073] A storage box 12 is fixed on the top of the cart 1, a box cover 13 is arranged on the top of the storage box 12, a vertical rod 14 is fixed on the bottom of the box cover 13, a slot 15 is fixed on the bottom of the vertical rod 14, a fourth cylinder 16 is fixedly installed inside the storage box 12, a limiting mechanism 7 is arranged inside the storage box 12, the storage box 12 is used to store new grinding wheels, the limiting mechanism 7 is used to limit the new grinding wheels in the storage box 12, the limiting mechanism 7 includes a third cylinder 71, the third cylinder 71 is rotatably arranged at the bottom of the storage box 12, and the bottom of the storage box 12 is rotatably connected with a sliding Rod 72, the outside of the slide bar 72 is slidably connected with a slider 73, the output end of the third cylinder 71 is rotatably connected with the slider 73, the bottom of the slide bar 72 is fixed with a first pressure rod 74, the second pressure rod 75 is rotatably connected with the end of the slide bar 72, one end of the second pressure rod 75 is rotatably connected with a connecting rod 76, one end of the connecting rod 76 is rotatably connected with the slider 73, a protective plate 77 is fixed inside the placement box 12, the protective plate 77 is slidably connected with a stop plate 78 through a set slide groove, a second spring 79 is set inside the slide groove, and one end of the second spring 79 is fixedly connected with the stop plate 78,

[0074] In this embodiment: after the old grinding wheel is removed, it is necessary to replace it with a new one, and the interior of the placement box 12 can be used to store the new grinding wheel, which can be stacked vertically on the inner side of the protective plate 77. Since the cart 11 will vibrate when encountering a bumpy road during movement, which may cause damage to the grinding wheels due to collision, it is necessary to use the limiting mechanism 7 to limit the stored grinding wheels. After the grinding wheel is placed in, the output end of the third cylinder 71 extends out, and then the sliding rod 72 and the first pressing rod 74 rotate toward the support plate 78 and press the support plate 78, and then the support plate 78 moves in the slide groove to compress the second spring 79, which is conducive to the side of the grinding wheel being moved by the movement of the support plate 78. When the second pressure rod 75 rotates, it is beneficial to support the other side of the grinding wheel. At this time, the four reverse directions of the grinding wheel are all restricted, which is beneficial to prevent the grinding wheels from colliding and being damaged when the road surface is bumpy. Then the box cover 13 is reset, and then the output end of the fourth cylinder 16 extends through the slot 15, which is beneficial to fix the box cover 13 to prevent it from opening when it shakes. When a new grinding wheel needs to be replaced, the old grinding wheel is placed in the barrel 23, and then the new grinding wheel is taken out and replaced.

[0075] The above are only preferred specific implementation modes of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical solutions and inventive concepts of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A trolley mechanism for replacing a grinding wheel on a spindle, comprising: A cart (11), characterized in that: a loading and unloading mechanism (2) is arranged on the top of the cart (11), the loading and unloading mechanism (2) is used to load the removed old grinding wheel, the loading and unloading mechanism (2) is arranged on one side of the top of the cart (11), a sand loading mechanism (3) is arranged on the top of the cart (11), the sand loading mechanism (3) is located on one side of the loading and unloading mechanism (2), the sand loading mechanism (3) is used to store abrasives used to manufacture grinding wheels, a screening component (4) is arranged on the top of the sand loading mechanism (3), the screening component (4) is used to screen out stone particles in the abrasives; The loading and unloading mechanism (2) comprises: A support column (21) is welded to both sides of the cart (11); the top of the support column (21) is rotatably connected to a support frame (22); a barrel (23) is fixed to the top of the support frame (22); a handle (24) is fixed to the outside of the support frame (22); a first cylinder (25) is fixed to the support column (21); the output end of the first cylinder (25) in an initial state is located at the bottom of the barrel (23) to provide support force for it; The barrel (23) can be turned 90 degrees by a handle (24) to facilitate loading and unloading. The screening component (4) comprises: A support frame (41), the support frame (41) is located at the top of the material box (31), the top of the material box (31) is rotatably connected to a second cylinder (42), the top of the material box (31) is fixed with a support rod (43), the inside of the support frame (41) is rotatably connected to a screen drum (44), the screen drum (44) is used to screen the abrasive to be loaded on the cart, and the outside of the screen drum (44) is evenly distributed with screen holes (45), A discharge hopper (46) is installed at the bottom of the support frame (41) for discharging the screened abrasive. A toothed circle (47) is arranged on the outer side of one end of the screen cylinder (44). A cylinder cover (48) which is electrically controlled to open and close is arranged on one end of the screen cylinder (44). One end of the support frame (41) is rotatably connected to the output end of the second cylinder (42), and the other end of the support frame (41) is rotatably connected to the top of the support rod (43).

2. A trolley mechanism for replacing a grinding wheel on a spindle according to claim 1, characterized in that: The sand loading mechanism (3) comprises: A material box (31), the material box (31) is fixed on the top of the cart (11) and on one side of the loading and unloading mechanism (2), a first chamber (32) and a second chamber (33) are arranged inside the material box (31), a first feed port (34) and a second feed port (35) are arranged on the top of the material box (31), the first feed port (34) is communicated with the first chamber (32), and the second feed port (35) is communicated with the second chamber (33), The first chamber (32) is used to store the screened abrasive, and the second chamber (33) is used to collect the stone particles screened from the abrasive.

3. A trolley mechanism for replacing a grinding wheel on a spindle according to claim 2, characterized in that: The material box (31) is equipped with a driving assembly (5), and the driving assembly (5) includes: A double-axis motor (51), the double-axis motor (51) is installed on the outside of the material box (31) by bolts, a support block (52) is arranged on the top of the material box (31), a first rod (53) is rotatably connected inside the support block (52), and a first gear (54) is fixed to one end of the first rod (53), A stirring blade (55), wherein the stirring blade (55) is rotatably arranged inside the first chamber (32), and the shaft at the center of the stirring blade (55) is fixedly connected to the other output end of the double-shaft motor (51), One end of the dual-axis motor (51) drives the first rod (53) and the first gear (54) to rotate by means of belt transmission.

4. The trolley mechanism for replacing a grinding wheel on a spindle according to claim 1, characterized in that: An anti-blocking component (6) is provided on the top of the sieve drum (44), and the anti-blocking component (6) comprises: A backing plate (61), the backing plate (61) is fixed to the top of the screen drum (44) through a vertical rod, the bottom of the vertical rod is welded to the top of the material box (31), the backing plate (61) is rotatably connected to a second rod (62) inside, a second gear (63) is fixed to one end of the second rod (62), the second gear (63) is meshed with the teeth (47), and a cam (64) is fixed to the outside of the second rod (62), A first spring (65), wherein the first spring (65) is fixed on the top of the pad (61), and a transverse plate (66) is fixed on the top of the first spring (65), and a top block (67) is fixed on the bottom of the transverse plate (66).

5. The trolley mechanism for replacing a grinding wheel on a spindle according to claim 1, characterized in that: A storage box (12) is fixed on the top of the cart (11), a box cover (13) is arranged on the top of the storage box (12), a limiting mechanism (7) is arranged inside the storage box (12), the storage box (12) is used to store new grinding wheels, and the limiting mechanism (7) is used to limit the new grinding wheels in the storage box (12).

6. A trolley mechanism for replacing a grinding wheel on a spindle according to claim 5, characterized in that: The limiting mechanism (7) comprises: A third cylinder (71), the third cylinder (71) is rotatably arranged at the bottom of the placement box (12), the bottom of the placement box (12) is rotatably connected with a slide rod (72), the outside of the slide rod (72) is slidably connected with a slider (73), the output end of the third cylinder (71) is rotatably connected with the slider (73), and the bottom of the slide rod (72) is fixed with a first pressure rod (74), A second pressure rod (75), the second pressure rod (75) is rotatably connected to the end of the slide rod (72), one end of the second pressure rod (75) is rotatably connected to a connecting rod (76), one end of the connecting rod (76) is rotatably connected to the slide block (73), A protective plate (77) is fixed inside the placement box (12), and the protective plate (77) is slidably connected to a stop plate (78) via a set slide groove, a second spring (79) is arranged inside the slide groove, and one end of the second spring (79) is fixedly connected to the stop plate (78).

7. A trolley mechanism for replacing a grinding wheel on a spindle according to claim 2, characterized in that: The bottoms of the first chamber (32) and the second chamber (33) are both inclined to facilitate material discharge; the first chamber (32) is provided with a first outlet (36), and the second chamber (33) is provided with a second outlet (37).

8. The trolley mechanism for replacing a grinding wheel on a spindle according to claim 5, characterized in that: A vertical rod (14) is fixed at the bottom of the box cover (13), a slot (15) is fixed at the bottom of the vertical rod (14), and a fourth cylinder (16) is fixedly installed inside the placement box (12).

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