A motorcycle crankshaft crank grinding device

Abstract

The present invention relates to the technical field of grinding devices, and discloses a motorcycle crankshaft crank grinding device, including a grinder body and an eccentric chuck arranged on the top of the grinder body for clamping the motorcycle crankshaft, and also includes: an equipment bracket, the equipment bracket is in a "U"-shaped structure, and two first brackets are symmetrically fixedly installed on the top of the equipment bracket, and a hydraulic telescopic rod is fixedly installed on the top of each first bracket; a grinding mechanism, and the grinding mechanism is arranged in the equipment bracket. The present invention sets a grinding mechanism and a detection mechanism, so that the sanding belt that is grinding the crankshaft crank passes back and forth through the detection frame, which plays a role in real-time monitoring of the state of the sanding belt, improves the safety of the equipment processing process, and at the same time, after detecting that the wear of the sanding belt grinding surface exceeds a threshold, a new grinding section is replaced in time for grinding, avoiding shutdown for sanding belt replacement, and higher work efficiency.

Description

Technical Field

[0001] The invention relates to the technical field of grinding devices, and in particular to a grinding device for a motorcycle crankshaft crank. Background Art

[0002] The motorcycle crankshaft is a vital component in the internal combustion engine. It converts the linear motion of the piston into rotational motion, thereby driving the output shaft of the engine. Specifically, the crankshaft is a shaft-shaped part that has been precisely machined and is usually made of durable materials such as steel or cast iron. There are multiple crank arms (also called cranks) on the crankshaft. Each crank arm is connected to the piston through a connecting rod. The reciprocating motion of the piston drives the crankshaft to rotate, driving the engine to rotate. During the manufacturing and repair process, the motorcycle crankshaft needs to be precisely polished to ensure a smooth surface and achieve the appropriate tolerance, which helps reduce friction, improve engine efficiency, and extend service life.

[0003] A crankshaft crank grinding device in the prior art (Announcement No.: CN219521629U) is provided with multiple groups of parallel grinding units, each group of grinding units works independently of each other, and multiple cranks can be ground at the same time, and different types of cranks can also be ground at the same time, thereby improving the grinding efficiency. However, the sanding belt used for grinding operation in the grinding unit is put into use as a whole, and the grinding part does not detect the sanding belt in operation, so the sanding belt cannot be detected in time and is prone to breakage, resulting in production accidents. Summary of the invention

[0004] The purpose of the present invention is to solve the shortcomings of the prior art and to propose a motorcycle crankshaft crank grinding device.

[0005] In order to achieve the above object, the present invention adopts the following technical solutions:

[0006] A motorcycle crankshaft crank grinding device comprises a grinder body and an eccentric chuck arranged on the top of the grinder body for clamping the motorcycle crankshaft, and also comprises: an equipment bracket, the equipment bracket is in a "U"-shaped structure, and two first brackets are symmetrically fixedly installed on the top of the equipment bracket, and a hydraulic telescopic rod is fixedly installed on the top of each first bracket; a grinding mechanism, the grinding mechanism is arranged in the equipment bracket, and the grinding mechanism is used to grind the motorcycle crankshaft crank; an adjusting mechanism, the adjusting mechanism is arranged in the equipment bracket, the adjusting mechanism adjusts the height by the hydraulic telescopic rod, and the adjusting mechanism is used to adjust the position of the grinding mechanism; the detecting mechanism is arranged on the surface of the grinding mechanism, and the detecting mechanism is used to detect the wear of the grinding mechanism and the grinding condition of the workpiece.

[0007] As a further scheme of the present invention, the grinding mechanism includes a support plate, an extension frame and a sanding belt, a guide roller, a first winding roller and a second winding roller are rotatably installed on one side of the support plate, a first slider is slidably installed on one side of the support plate, a tensioning roller is rotatably installed on one side of the first slider, the extension frame is fixedly installed on one side of the support plate, an adjustment cavity is provided at the bottom of the support plate, the adjustment cavity is open structure away from one end of the support plate, the other end of the adjustment cavity is provided with a channel that is adapted to the sanding belt and passes through its surface, an extension rod is slidably installed in the adjustment cavity, one end of the sanding belt is fixed to the first winding roller, and the other end of the sanding belt is fixedly installed on the surface of the second winding roller after being wound around the guide roller, the extension rod, the extension frame and the tensioning roller.

[0008] As a further scheme of the present invention, the sanding belt is first wound on the surface of the first winding roller, and the second winding roller is used to wind the sanded sanding belt. The extension rod is a plate-shaped structure and a semicircular structure is opened at one end. Two positioning shafts are fixedly installed on the other end of the extension rod. Two positioning holes matching the positioning shafts are opened on one side of the adjustment cavity. The two positioning shafts are slidably installed in the two positioning holes. The sanding belt is attached to the bottom of the extension frame after passing through the guide roller. A polished surface and a smooth surface are respectively provided on two opposite sides of the sanding belt, and the side of the sanding belt close to the guide roller surface is a polished surface.

[0009] As a further solution of the present invention, a first motor, a second motor and a third electric telescopic rod are fixedly installed on the other side of the support plate, the output end of the first motor is fixedly installed with the rotation center of one end of the first winding roller through a connecting shaft, the output end of the second motor is fixedly installed with the rotation center of one end of the second winding roller through a connecting shaft, the telescopic end of the third electric telescopic rod is fixedly installed with one side of the first slider, and the fixed cover on the surface of the support plate is connected to a first protective cover, and the first protective cover is used to protect the first motor, the second motor and the third electric telescopic rod.

[0010] As a further solution of the present invention, a third slider is slidably installed on one side of the extension frame, a second electric telescopic rod is fixedly installed on one side of the extension frame, the telescopic end of the second electric telescopic rod is fixedly installed on one side of the third slider, the third slider is fixedly installed on one side of the extension frame through a connecting shaft, and an avoidance groove compatible with the connecting shaft is opened on the surface of the extension frame.

[0011] As a further solution of the present invention, the detection mechanism includes an infrared imaging camera and a digital micrometer. A detection frame is fixedly installed on the top of the extension frame. The top of the adjustment cavity is connected to the interior of the detection frame. A partition is fixedly installed on the top of the detection frame. The infrared imaging camera is fixedly installed on one side of the top of the partition. The middle of the top of the partition is a hollow structure to facilitate the infrared imaging camera to detect the sanding belt. The top of the partition is fixedly covered with a second protective cover.

[0012] As a further solution of the present invention, a fourth electric telescopic rod is fixedly installed at the top of the partition board. Adjusting grooves are symmetrically formed on the opposite side surfaces of the detection frame. A second connecting rod is slidably installed between the two adjusting grooves. Third brackets are fixedly installed at both ends of the second connecting rod. The third bracket has a U-shaped structure with an upward opening. A fourth bracket is slidably installed in the third bracket. The digital micrometer is fixedly installed at the bottom of the fourth bracket. A first electric telescopic rod is fixedly installed at the bottom of the third bracket. The telescopic end of the first electric telescopic rod is fixedly installed on the surface of the fourth bracket.

[0013] As a further solution of the present invention, the adjusting mechanism includes a guide rod, a guide rail and two first connecting rods. The first connecting rod has a "work" - shaped structure. The two first connecting rods are slidably installed in the equipment bracket. The guide rod and the guide rail are respectively fixedly installed on the surfaces of the two first connecting rods at both ends. A second bracket is fixedly installed at the top of each first connecting rod. Each second bracket has a U-shaped structure with a downward opening. The top parts of the two second brackets are respectively fixedly installed with the telescopic ends of the two hydraulic telescopic rods. The guide rail has a U-shaped structure. A lead screw is rotatably installed in the guide rail. A second slider with a T-shaped structure is slidably installed in the guide rail. The second slider is threadedly sleeved on the surface of the lead screw. A third motor is fixedly installed on one side of the first connecting rod. The output end of the third motor is fixedly installed at the rotation center of one end of the lead screw.

[0014] As a further solution of the present invention, through holes adapted to the second brackets are formed at the top of the equipment bracket. The support plate is slidably sleeved on the surface of the guide rod. The support plate is slidably installed on the surface of the guide rail. The second slider is fixedly connected to the support plate by bolts. A first inspection door and a second inspection door are hinged on one side of the equipment bracket.

[0015] Compared with the prior art, the present invention has the following beneficial effects:

[0016] 1. By setting the grinding mechanism and the detection mechanism, driving the abrasive belt in the extension frame to slide reciprocally, the abrasive belt that is grinding the crank of the crankshaft can pass through the detection frame back and forth, which is convenient for the infrared imaging camera to capture and detect, playing a role in monitoring the state of the abrasive belt at all times, avoiding the situation that the crack of the abrasive belt cannot be found and processed in time resulting in breakage, improving the safety of the equipment processing process. The whole abrasive belt is divided into several grinding segments. When the infrared imaging camera detects that the wear of the grinding surface of the abrasive belt exceeds the threshold, by releasing the abrasive belt through the first winding roller and synchronously winding the second winding roller, a new grinding segment can be replaced in time for grinding, avoiding shutting down the machine to replace the abrasive belt and improving the working efficiency of the equipment;

[0017] 2. The first motor and the second motor are arranged to drive the first winding roller and the second winding roller respectively. When the required grinding part exceeds the coverage range of the extension frame, the second electric telescopic rod is started to extend a proper distance, thereby driving the lever to extend from one end of the extension frame. At the same time, the first motor drives the first winding roller to release the sanding belt of corresponding length, and the second motor drives the second winding roller to tighten the sanding belt to keep it taut, thereby facilitating the extension of the sanding belt to the required position, so that multiple areas to be ground on the surface of the crankshaft crank can be ground, thereby improving the use range of the equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 This is a schematic structural diagram of a motorcycle crankshaft crank grinding device proposed by the present invention;

[0019] Figure 2 A schematic diagram of the installation of a grinding mechanism of a motorcycle crankshaft crank grinding device proposed by the present invention;

[0020] Figure 3 for Figure 2 A schematic diagram of the enlarged structure of part A;

[0021] Figure 4 for Figure 2 A schematic diagram of the enlarged structure of part B;

[0022] Figure 5 A schematic diagram of the structure of an adjustment mechanism of a motorcycle crankshaft crank grinding device proposed by the present invention;

[0023] Figure 6 A schematic diagram of the rear structure of an equipment support of a motorcycle crankshaft crank grinding device proposed by the present invention;

[0024] Figure 7 This is a schematic diagram of the disassembled structure of a grinding mechanism of a motorcycle crankshaft crank grinding device proposed by the present invention;

[0025] Figure 8 A schematic diagram of the connection between an extension frame and an extension rod of a motorcycle crankshaft crank grinding device proposed by the present invention;

[0026] Fig. 9 for Figure 8 Schematic diagram of the enlarged structure of part C.

[0027] In the figure: 1. Grinding machine body; 2. Equipment bracket; 3. Grinding mechanism; 301. Support plate; 302. First protective cover; 303. Abrasive belt; 304. Extension frame; 305. Detection frame; 306. Adjustment slot; 307. Extension rod; 308. Guide roller; 309. First winding roller; 310. Second winding roller; 311. First motor; 312. Second motor; 313. Positioning shaft; 314. Adjustment chamber; 315. Positioning hole; 4. Hydraulic telescopic rod; 5. First bracket; 6. Second bracket; 7. , the first connecting rod; 8, the guide rod; 9, the guide rail; 10, the first sliding block; 11, the third bracket; 12, the fourth bracket; 13, the first electric telescopic rod; 14, the digital micrometer; 15, the first inspection door; 16, the second inspection door; 17, the second sliding block; 18, the screw rod; 19, the third sliding block; 20, the second electric telescopic rod; 21, the tensioning roller; 22, the third electric telescopic rod; 23, the partition; 24, the fourth electric telescopic rod; 25, the infrared imaging camera; 26, the second protective cover; 27, the third motor. DETAILED DESCRIPTION

[0028] In order to make the technical means, creative features, objectives and effects achieved by the present invention easy to understand, the present invention is further explained below in conjunction with specific implementation methods.

[0029] In the description of the present invention, it should be noted that the terms "upper", "lower", "inner", "outer", "front end", "rear end", "two ends", "one end", "the other end" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply 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" and "second" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance.

[0030] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "provided with", "connected", etc. should be understood in a broad sense. For example, "connected" 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 a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0031] Reference Figure 1-Figure 9A motorcycle crankshaft grinding device comprises a grinder body 1 and an eccentric chuck arranged on the top of the grinder body 1 for clamping the motorcycle crankshaft, and also comprises: an equipment bracket 2, the equipment bracket 2 is a "U"-shaped structure, and two first brackets 5 are symmetrically fixedly installed on the top of the equipment bracket 2, and a hydraulic telescopic rod 4 is fixedly installed on the top of each first bracket 5; a grinding mechanism 3, the grinding mechanism 3 is arranged in the equipment bracket 2, and the grinding mechanism 3 is used for grinding the motorcycle crankshaft; an adjusting mechanism, the adjusting mechanism is arranged in the equipment bracket 2, the adjusting mechanism adjusts the height through the hydraulic telescopic rod 4, and the adjusting mechanism is used to adjust the position of the grinding mechanism 3; a detection mechanism The detection mechanism is arranged on the surface of the grinding mechanism 3. The detection mechanism is used to detect the wear of the grinding mechanism 3 and the grinding condition of the workpiece. The present invention clamps the motorcycle crankshaft between the eccentric chucks arranged on the grinder body so that the crankshaft rotates with the center of the crank to be processed as the rotation center, which is convenient for the crank to be stably rotated in one position for grinding. The detection mechanism is arranged to monitor the grinding mechanism 3 in real time, and the PLC control system is introduced. When the detection mechanism detects the working status of the grinding mechanism 3 and feeds back to the operator in real time, the safety of equipment processing is improved. The adjustment mechanism is arranged to help the equipment to better grind multiple grinding parts in the crankshaft crank, thereby improving the scope of application of the equipment.

[0032] In this embodiment, the grinding mechanism 3 includes a support plate 301, an extension frame 304 and an abrasive belt 303. A guide roller 308, a first winding roller 309 and a second winding roller 310 are rotatably installed on one side of the support plate 301. A first slider 10 is slidably installed on one side of the support plate 301. A tensioning roller 21 is rotatably installed on one side of the first slider 10. The extension frame 304 is fixedly installed on one side of the support plate 301. An adjusting cavity 314 is provided at the bottom of the support plate 301. The adjusting cavity 314 is open at one end away from the support plate 301. A channel that is adapted to the abrasive belt 303 and runs through its surface is provided at the other end of the adjusting cavity 314. An extension rod 307 is slidably installed in the adjusting cavity 314. One end of the abrasive belt 303 is fixed to the first winding roller 309, and the other end of the abrasive belt 303 is fixedly installed on the surface of the second winding roller 310 after being wound through the guide roller 308, the extension rod 307, the extension frame 304 and the tensioning roller 21.

[0033] The sanding belt 303 is first wound around the surface of the first winding roller 309, and the second winding roller 310 is used to wind the sanded sanding belt 303. The extension rod 307 is a plate-shaped structure and a semicircular structure is opened at one end. Two positioning shafts 313 are fixedly installed at the other end of the extension rod 307. Two positioning holes 315 compatible with the positioning shafts 313 are opened on one side of the adjustment cavity 314. The two positioning shafts 313 are slidably installed in the two positioning holes 315. The sanding belt 303 fits the bottom of the extension frame 304 after passing through the guide roller 308. The two opposite sides of the sanding belt 303 are respectively provided with a grinding surface and a smooth surface. The side of the sanding belt 303 close to the guide roller 308 is a grinding surface. The other side of the support plate 301 is fixedly installed with a first motor 311, a second motor 312 and a third electric telescopic rod 22. The output end of the first motor 311 is connected to the One end of the first winding roller 309 is fixedly installed at the rotation center, the output end of the second motor 312 is fixedly installed with the rotation center of one end of the second winding roller 310 through a connecting shaft, the telescopic end of the third electric telescopic rod 22 is fixedly installed with one side of the first slider 10, and the fixed cover on the surface of the support plate 301 is connected to the first protective cover 302, the first protective cover 302 is used to protect the first motor 311, the second motor 312 and the third electric telescopic rod 22, the third slider 19 is slidably installed on one side of the extension frame 304, the second electric telescopic rod 20 is fixedly installed on one side of the extension frame 304, the telescopic end of the second electric telescopic rod 20 is fixedly installed with one side of the third slider 19, the third slider 19 is fixedly installed with one side of the extension frame 304 through a connecting shaft and an extension rod 307, and a avoidance groove compatible with the connecting shaft is opened on the surface of the extension frame 304.

[0034] When in use, the sanding belt 303 is divided into several sanding sections, and the length of the sanding section is determined by the angle of synchronous rotation of the first winding roller 309 and the second winding roller 310. By driving the first winding roller 309 and the second winding roller 310 to rotate forward and reversely, one of the sanding sections of the sanding belt 303 can be reciprocated in one area for sanding work. At the same time, the sanding surface of the sanding belt 303 of the sanding section is under the detection of the detection mechanism. The positions of the centers of the multiple cranks on the crankshaft surface from the sanding mechanism 3 are different. When the required sanding part exceeds the extension When the coverage range of the extension frame 304 is reached, the second electric telescopic rod 20 is started to extend to an appropriate distance, thereby driving the extension rod 307 to extend from one end of the extension frame 304, and at the same time, the first motor 311 drives the first winding roller 309 to release the sanding belt 303 of corresponding length, and the second motor 312 drives the second winding roller 310 to tighten the sanding belt 303 to keep the sanding belt 303 taut, thereby facilitating the sanding belt 303 to extend to a desired position, so that it can grind multiple areas to be polished on the surface of the crankshaft crank, thereby improving the application range of the equipment.

[0035] In this embodiment, the detection mechanism includes an infrared imaging camera 25 and a digital micrometer 14. A detection frame 305 is fixedly installed at the top of the extension frame 304. The top of the adjustment cavity 314 is communicated with the inside of the detection frame 305. A partition plate 23 is fixedly installed at the top of the detection frame 305. The infrared imaging camera 25 is fixedly installed on one side of the top of the partition plate 23. The middle of the top of the partition plate 23 is in a hollow structure to facilitate the infrared imaging camera 25 to detect the abrasive belt 303. A second protective cover 26 is fixedly sleeved on the top of the partition plate 23. A fourth electric telescopic rod 24 is also fixedly installed on the top of the partition plate 23. Adjustment grooves 306 are symmetrically formed on two opposite side surfaces of the detection frame 305. A second connecting rod is slidably installed between the two adjustment grooves 306. Third brackets 11 are fixedly installed at both ends of the second connecting rod. The third brackets 11 are in a U-shaped structure with an upward opening. A fourth bracket 12 is slidably installed inside the third brackets 11. The digital micrometer 14 is fixedly installed at the bottom of the fourth bracket 12. A first electric telescopic rod 13 is fixedly installed at the bottom of the third bracket 11. The telescopic end of the first electric telescopic rod 13 is fixedly installed on the surface of the fourth bracket 12.

[0036] During use, the grinding mechanism 3 and the detection mechanism cooperate. The abrasive belt 303 in the grinding mechanism 3 reciprocates in the extension frame 304, enabling the abrasive belt 303 that is grinding the crankshaft crank to pass through the detection frame 305 back and forth, facilitating the infrared imaging camera 25 to capture and detect. The infrared imaging camera 25 can be used to monitor the temperature change of the abrasive belt 303. Cracks usually cause abnormal temperatures. By capturing the temperature distribution map with the infrared imaging camera 25, the position and degree of the cracks can be indirectly detected, playing a role in real-time monitoring of the state of the abrasive belt 303, avoiding the situation where cracks in the abrasive belt 303 cannot be detected and processed in time, resulting in breakage, and improving the safety of the equipment processing process. If the degree of the crack is not serious, the cracked part can be wound up by the second winding roller 310, and then the grinding operation can continue, avoiding the shutdown for replacing the abrasive belt 303 and affecting the processing efficiency; when the whole abrasive belt 303 is divided into several grinding segments, the infrared imaging camera 25 can also detect the wear degree of the abrasive belt 303. When the wear of the grinding surface of the abrasive belt 303 exceeds the threshold, the abrasive belt 303 is released by the first winding roller 309 and the second winding roller 310 synchronously winds up, enabling timely replacement of a new grinding segment for grinding, avoiding shutdown for replacing the abrasive belt 303, and further improving the working efficiency of the equipment;

[0037] The detection mechanism is equipped with a digital micrometer 14. The digital micrometer 14 is a precision measuring tool used to accurately measure the outer diameter, inner diameter, depth and other dimensions of an object. The digital micrometer 14 is set to be connected to the PLC control system, so as to monitor the workpiece grinding situation in real time. And by connecting to the control system, the measurement data is fed back to the control system in real time, so as to carry out automatic adjustment or alarm processing, ensuring that the dimensions of the workpiece after grinding are always within the qualified range. The position of the digital micrometer 14 can be finely adjusted by the first electric telescopic rod 13 and the fourth electric telescopic rod 24, so that it can more accurately detect the data of the crankshaft crank after grinding.

[0038] In this embodiment, the adjusting mechanism includes a guide rod 8, a guide rail 9 and two first connecting rods 7. The first connecting rods 7 are in an "I" - shaped structure. The two first connecting rods 7 are slidably installed in the equipment support 2. The two ends of the guide rod 8 and the guide rail 9 are respectively fixedly installed on the surfaces of the two first connecting rods 7. A second support 6 is fixedly installed at the top of each first connecting rod 7. Each second support 6 is in a U - shaped structure with an opening downward. The top parts of the two second supports 6 are respectively fixedly installed with the telescopic ends of the two hydraulic telescopic rods 4. The guide rail 9 is in a U - shaped structure. A lead screw 18 is rotatably installed in the guide rail 9. A second slider 17 in a T - shaped structure is slidably installed in the guide rail 9. The second slider 17 is threadedly sleeved on the surface of the lead screw 18. A third motor 27 is fixedly installed on one side of the first connecting rod 7. The output end of the third motor 27 is fixedly installed with the rotation center of one end of the lead screw 18. A through - hole adapted to the second support 6 is opened at the top of the equipment support 2. The support plate 301 is slidably sleeved on the surface of the guide rod 8. The support plate 301 is slidably installed on the surface of the guide rail 9. The second slider 17 is fixedly connected to the support plate 301 by bolts. A first inspection door 15 and a second inspection door 16 are hinged on one side of the equipment support 2.

[0039] During use, by driving the two hydraulic telescopic rods 4 to work synchronously, the height of the two first connecting rods 7 can be adjusted, so as to raise the grinding mechanism 3 when changing the grinding area. Then start the third motor 27 to drive the lead screw 18 to rotate. The lead screw 18 drives the second slider 17 to slide in the guide rail 9 by threading, so as to adjust the position of the support plate 301 in the grinding mechanism 3 on the surface of the guide rod 8. According to the position of the next grinding area, the grinding mechanism 3 is adjusted to be above it, and then lowered so that the sand belt 303 is in contact with the surface of the workpiece to be ground. By opening the first inspection door 15, the third motor 27 in the adjusting mechanism can be maintained. By opening the second inspection door 16, the adjusting mechanism can be maintained, improving the convenience of equipment use.

[0040] The above shows and describes the basic principles and main features of the present invention and the advantages of the present invention. It should be understood by those skilled in the art that the present invention is not limited to the above embodiments. The above embodiments and descriptions are only for explaining the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention may have various changes and improvements, which fall within the scope of the present invention to be protected. The scope of protection of the present invention is defined by the attached claims and their equivalents.

Claims

1. A motorcycle crankshaft grinding device, comprising a grinder body (1) and an eccentric chuck arranged on the top of the grinder body (1) for clamping the motorcycle crankshaft, characterized in that: It further includes: A device bracket (2), the device bracket (2) has a "return" - shaped structure, and two first brackets (5) are symmetrically and fixedly installed at the top of the device bracket (2). A hydraulic telescopic rod (4) is fixedly installed at the top of each first bracket (5); A grinding mechanism (3), the grinding mechanism (3) is arranged inside the device bracket (2), and the grinding mechanism (3) is used for grinding the crank of a motorcycle crankshaft; An adjustment mechanism, the adjustment mechanism is arranged inside the device bracket (2), the adjustment mechanism adjusts its height through the hydraulic telescopic rod (4), and the adjustment mechanism is used for adjusting the position of the grinding mechanism (3); A detection mechanism, the detection mechanism is arranged on the surface of the grinding mechanism (3), and the detection mechanism is used for detecting the wear of the grinding mechanism (3) and the grinding condition of the workpiece; The grinding mechanism (3) comprises a support plate (301), an extension frame (304) and an abrasive belt (303); a guide roller (308), a first winding roller (309) and a second winding roller (310) are rotatably mounted on one side of the support plate (301); a first slider (10) is slidably mounted on one side of the support plate (301); a tensioning roller (21) is rotatably mounted on one side of the first slider (10); the extension frame (304) is fixedly mounted on one side of the support plate (301); an adjustment cavity (314) is provided at the bottom of the support plate (301); the adjustment cavity (314) is open at one end away from the support plate (301); and a spring adapted to the abrasive belt (303) is provided at the other end of the adjustment cavity (314). A passage is provided on the surface of the adjusting chamber (314) and passes through the extending rod (307), and an extension rod (307) is slidably installed in the adjusting chamber (314). One end of the sanding belt (303) is fixed to the first winding roller (309), and the other end of the sanding belt (303) is fixedly installed on the surface of the second winding roller (310) after being wound through the guide roller (308), the extending rod (307), the extension frame (304) and the tensioning roller (21). The sanding belt (303) is firstly wound on the surface of the first winding roller (309), and the second winding roller (310) is used to wind the sanding belt (303) after grinding. The extending rod (307) is in a plate-like structure and one end is opened in a semicircular structure. Two positioning shafts (313) are fixedly installed on the other end of the extending rod (307). Two positioning holes (315) adapted to the positioning shaft (313) are provided on one side of the adjustment cavity (314). The two positioning shafts (313) are slidably mounted in the two positioning holes (315). The sanding belt (303) is fitted to the bottom of the extension frame (304) after passing through the guide roller (308). Two opposite sides of the sanding belt (303) are provided with a grinding surface and a smooth surface respectively. The side of the sanding belt (303) close to the guide roller (308) is the grinding surface. The other side of the support plate (301) is fixedly mounted with a first motor (311), a second motor (312) and a third electric telescopic rod (22). The output end of the first motor (311) is connected to the rotation center of one end of the first winding roller (309) via a connecting shaft. The second motor (312) is fixedly installed at the rotation center of one end of the second winding roller (310) via a connecting shaft, the telescopic end of the third electric telescopic rod (22) is fixedly installed at one side of the first slider (10), the surface of the support plate (301) is fixedly covered with a first protective cover (302), the first protective cover (302) is used to protect the first motor (311), the second motor (312) and the third electric telescopic rod (22), the extension frame (304) is slidably installed at one side of the third slider (19), the extension frame (304) is fixedly installed at one side of the second electric telescopic rod (20), the telescopic end of the second electric telescopic rod (20) is fixedly installed at one side of the third slider (19),The third sliding block (19) is fixedly mounted on one side of the extension frame (304) through a connecting shaft and one side of the extension rod (307), and a avoiding groove matching the connecting shaft is provided on the surface of the extension frame (304).

2. A motorcycle crankshaft grinding device according to claim 1, characterized in that: The detection mechanism includes an infrared imaging camera (25) and a digital micrometer (14). A detection frame (305) is fixedly installed at the top of the extension bracket (304). The top of the adjustment cavity (314) is communicated with the inside of the detection frame (305). A partition plate (23) is fixedly installed at the top of the detection frame (305). The infrared imaging camera (25) is fixedly installed on one side of the top of the partition plate (23). The middle of the top of the partition plate (23) has a hollow structure to facilitate the infrared imaging camera (25) to detect the abrasive belt (303). A second protective cover (26) is fixedly sleeved on the top of the partition plate (23).

3. A motorcycle crankshaft grinding device according to claim 2, characterized in that: A fourth electric telescopic rod (24) is also fixedly installed on the top of the partition plate (23). Adjustment grooves (306) are symmetrically formed on the surfaces of two opposite sides of the detection frame (305). A second connecting rod is slidably installed between the two adjustment grooves (306). Third brackets (11) are fixedly installed at both ends of the second connecting rod. The third bracket (11) has a U - shaped structure with an upward opening. A fourth bracket (12) is slidably installed inside the third bracket (11). The digital micrometer (14) is fixedly installed at the bottom of the fourth bracket (12). A first electric telescopic rod (13) is fixedly installed at the bottom of the third bracket (11). The telescopic end of the first electric telescopic rod (13) is fixedly installed on the surface of the fourth bracket (12).

4. A motorcycle crankshaft grinding device according to claim 3, characterized in that: The adjusting mechanism includes a guide rod (8), a guide rail (9) and two first connecting rods (7). The first connecting rod (7) has an "I"-shaped structure. The two first connecting rods (7) are slidably installed in the equipment support (2). The two ends of the guide rod (8) and the guide rail (9) are respectively fixedly installed on the surfaces of the two first connecting rods (7). A second support (6) is fixedly installed at the top of each first connecting rod (7). Each second support (6) has a U-shaped structure with an opening downward. The tops of the two second supports (6) are respectively fixedly installed with the telescopic ends of two hydraulic telescopic rods (4). The guide rail (9) has a U-shaped structure. A lead screw (18) is rotatably installed in the guide rail (9). A second slider (17) with a T-shaped structure is slidably installed in the guide rail (9). The second slider (17) is threadedly sleeved on the surface of the lead screw (18). A third motor (27) is fixedly installed on one side of the first connecting rod (7). The output end of the third motor (27) is fixedly installed at the rotation center of one end of the lead screw (18).

5. A motorcycle crankshaft grinding device according to claim 4, characterized in that: A through hole adapted to the second support (6) is opened at the top of the equipment support (2). The support plate (301) is slidably sleeved on the surface of the guide rod (8). The support plate (301) is slidably installed on the surface of the guide rail (9). The second slider (17) is fixedly connected to the support plate (301) by bolts. A first inspection door (15) and a second inspection door (16) are hinged on one side of the equipment support (2).

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