Grinding and polishing device for engine crankshaft

Abstract

The engine crankshaft grinding and polishing device comprises a bottom plate, supporting plates are installed on the front end face and the rear end face of the top of the bottom plate at equal intervals, fixing plates are installed on the tops of the supporting plates, and rotatable crankshaft bodies are installed between the two fixing plates at equal intervals. When crankshaft journals need to be ground, all the crankshaft journals are sleeved with the arc-shaped polishing plate, driving equipment starts to rotate at a constant speed, the crankshaft journals rotate around the axis of the crankshaft, the arc-shaped polishing plate can be driven to synchronously rotate on a track in the rotating process, and a piston assembly conducts piston movement in the rotating process; the crank journals slide relative to the arc-shaped polishing plate in the rotating process, large friction force is achieved, the outer walls of the crank journals can be ground and polished through the arc-shaped polishing plate in the process, the positions of the piston assemblies can be adjusted up and down along with the piston assemblies when the piston assemblies do piston motion, and all the crank journals on the crankshaft body can be ground and polished at a time; working efficiency is high and operation is simple.

Description

Technical Field

[0001] The invention relates to the technical field of crankshaft processing, in particular to a grinding and polishing device for an engine crankshaft. Background Art

[0002] The crankshaft is an important part of the engine and is responsible for the power output of the engine. An important indicator of the crankshaft's quality performance is the surface roughness of the crankshaft's diameter. If it does not meet the use requirements, it is very easy to cause destructive accidents such as engine bearing burnout and bearing decomposition. In severe cases, the entire engine may be scrapped. In order to improve the quality of the surface roughness, the crankshaft is usually polished.

[0003] A crankshaft generally includes a main journal, a crank neck and a counterweight plate connected to the crank neck. When personnel grind the crank neck, they usually grind the crank neck and the inner side of the counterweight plate. The counterweight plate is flat and is easier to grind. However, the crank neck is cylindrical and its axis is inconsistent with the crankshaft axis. It is impossible to control the rotation of the crankshaft to grind the outer side of the crank neck. In the prior art, the crank necks need to be grinded one by one, which results in low work efficiency.

[0004] Therefore, it is necessary to provide an engine crankshaft grinding and polishing device to solve the above-mentioned technical problems. Summary of the invention

[0005] The purpose of the present invention is to provide an engine crankshaft grinding and polishing device to solve the problems existing in the above-mentioned background technology. The technical solution of the present invention aims at the technical problem that the existing technical solution is too single, and provides a solution that is significantly different from the existing technology.

[0006] To achieve the above-mentioned objectives, the present invention provides the following technical solutions: an engine crankshaft grinding and polishing device, comprising a base plate, support plates are equidistantly installed on the front and rear end surfaces of the top of the base plate, a fixed plate is installed on the top of the support plate, a rotatable crankshaft body is equidistantly installed between the two fixed plates, a lifting plate that can be adjusted up and down is installed at the top center of the base plate, a limiting mechanism is equidistantly installed on the top of the lifting plate, a connecting plate is equidistantly installed between the two fixed plates, a piston assembly that can move up and down is equidistantly installed on one end of the connecting plate, and a grinding mechanism is connected to the telescopic end of the piston assembly.

[0007] Preferably, the front end face of the fixed plate on the front side is installed with an electric rod passing through the fixed plate, the telescopic end of the electric rod is connected to a T-shaped circular plate, the rear end face of the T-shaped circular plate is rotatably connected to a pressure plate for extruding the crankshaft body, and the front end face of the fixed plate on the rear side is connected to a rotating plate, and the front end face of the rotating plate is rotatably connected to a fixed sleeve sleeved on the outer wall of the crankshaft body shaft.

[0008] Preferably, hydraulic rods fixed to the top of the bottom plate are installed at the centers of the two ends of the bottom of the lifting plate, and telescopic rods fixed to the top of the bottom plate are installed at the four corners of the bottom of the lifting plate.

[0009] Preferably, the limiting mechanism includes a first support seat equidistantly installed on the rear side of the top of the lifting plate, and grooves are equidistantly opened on the front side of the top of the lifting plate. A screw is rotatably connected inside the groove, and a threaded seat is threadedly connected to the outer wall of the screw, and a second support seat is connected to the top of the threaded seat.

[0010] Preferably, a slot is further provided on the top of the lifting plate, and rotating rods connected to the screw rods are equidistantly installed inside the slot, and the outer walls of the three groups of rotating rods are driven by a transmission assembly.

[0011] Preferably, the grinding mechanism includes a mounting seat installed on the telescopic end of the piston assembly, the inner side of the mounting seat is rotatably connected to a bidirectional threaded rod, the outer wall of the bidirectional threaded rod is installed with an adjustment seat, one end of the adjustment seat is connected to an arc rod, the other end of the arc rod is connected to an arc polishing plate, and a motor for driving the bidirectional threaded rod to rotate is arranged on the top of the mounting seat.

[0012] Preferably, one end of the connecting plate is provided with limiting grooves at equal intervals, a fixing rod is installed inside the limiting groove, and an outer wall of the fixing rod is movably connected to a limiting seat fixed to one end of the piston assembly.

[0013] Compared with the prior art, the present invention has the following beneficial effects: When the crankshaft neck needs to be polished, the present invention covers all the crankshaft necks with the arc-shaped polishing plate, and the driving device starts to rotate at a uniform speed. The crankshaft neck rotates about the crankshaft axis, and the arc-shaped polishing plate is driven to synchronously rotate in orbit during the rotation. In the process of rotation, the piston assembly performs piston movement. During the rotation of the crankshaft neck, relative sliding occurs between the crankshaft neck and the arc-shaped polishing plate, which has a large friction force. During this process, the arc-shaped polishing plate polishes the outer wall of the crankshaft neck, and the piston assembly also adjusts its position up and down when performing piston movement, so that all the crankshaft necks on the crankshaft body can be polished at one time, and the work efficiency is high and the operation is simple. The present invention can be provided with a fixed sleeve which can be sleeved on a shaft connected to one end of the crankshaft body, and then the other end is extended by the provided electric rod to squeeze the pressure plate, thereby clamping and fixing the crankshaft body, and the provided pressure plate and the T-shaped circular plate, and the fixed sleeve and the rotating plate are all rotatably connected, so that the crankshaft body can be rotated while being positioned, which is convenient for subsequent grinding and polishing work; When positioning the crankshaft body, the present invention first controls the distance between the second support seat and the first support seat by the length of the crankshaft body, and then places the shafts at both ends of the crankshaft body on the arc edges opened at the top of the second support seat and the first support seat respectively, and adjusts the position of the second support seat by the number of crankshaft necks on the crankshaft body, so that crankshaft bodies with different numbers of crankshaft necks corresponding to different lengths can be supported. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 A perspective view of the present invention; Figure 2 This is a schematic diagram of the structure of the connection between the lifting plate and the bottom plate of the present invention; Figure 3 A three-dimensional diagram of the connection between the grinding mechanism of the present invention and the crankshaft body; Figure 4 is a three-dimensional diagram of the grinding mechanism of the present invention; Figure 5 A three-dimensional diagram of the connection between the piston assembly and the connecting plate of the present invention; Figure 6 It is a schematic diagram of the connection between the piston assembly and the fixed rod of the present invention.

[0015] In the figure: 1. bottom plate; 2. support plate; 3. fixed plate; 4. crankshaft body; 5. lifting plate; 6. limiting mechanism; 601. first supporting seat; 602. groove; 603. screw rod; 604. threaded seat; 605. second supporting seat; 7. connecting plate; 8. piston assembly; 9. grinding mechanism; 901. mounting seat; 902. two-way threaded rod; 903. adjusting seat; 904. arc rod; 905. arc polishing plate; 906. motor; 10. electric rod; 11. T-shaped circular plate; 12. pressure plate; 13. rotating plate; 14. fixing sleeve; 15. hydraulic rod; 16. telescopic rod; 17. slotting; 18. rotating rod; 19. transmission assembly; 20. limiting groove; 21. fixing rod; 22. limiting seat. DETAILED DESCRIPTION

[0016] 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.

[0017] In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the drawings, which 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", "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 an embodiment of the present invention based on the overall structure of the present invention.

[0018] See also Figure 1-6 A grinding and polishing device for an engine crankshaft comprises a base plate 1, support plates 2 are equidistantly installed on the front and rear end surfaces of the top of the base plate 1, a fixing plate 3 is installed on the top of the support plate 2, a rotatable crankshaft body 4 is equidistantly installed between the two fixing plates 3, a lifting plate 5 that can be adjusted up and down is installed at the top center of the base plate 1, a limiting mechanism 6 is equidistantly installed on the top of the lifting plate 5, a connecting plate 7 is equidistantly installed between the two fixing plates 3, a piston assembly 8 that can move up and down is equidistantly installed at one end of the connecting plate 7, and a grinding mechanism 9 is connected to the telescopic end of the piston assembly 8.

[0019] like Figure 1-6 As shown, the front end face of the fixed plate 3 on the front side is installed with an electric rod 10 that passes through the fixed plate 3, the telescopic end of the electric rod 10 is connected with a T-shaped circular plate 11, and the rear end face of the T-shaped circular plate 11 is rotatably connected with a pressure plate 12 that squeezes the crankshaft body 4, and the front end face of the fixed plate 3 on the rear side is connected with a rotating plate 13, and the front end face of the rotating plate 13 is rotatably connected with a fixed sleeve 14 that is sleeved on the outer wall of the shaft rod of the crankshaft body 4, the fixed sleeve 14 can be sleeved on the shaft rod connected to one end of the crankshaft body 4, and then the other end is extended by the set electric rod 10 to squeeze the pressure plate 12, thereby clamping and fixing the crankshaft body 4, and the set pressure plate 12 and the T-shaped circular plate 11, and the fixed sleeve 14 and the rotating plate 13 are all rotatably connected, so that the crankshaft body 4 can be rotated while being positioned, which is convenient for subsequent grinding and polishing work.

[0020] like Figure 1-6As shown, hydraulic rods 15 fixed to the top of the base plate 1 are installed at the centers of the two ends of the bottom of the lifting plate 5, and telescopic rods 16 fixed to the top of the base plate 1 are installed at the four corners of the bottom of the lifting plate 5. The set hydraulic rods 15 can control the lifting and lowering of the lifting plate 5, so as to realize the transportation and unloading of the crankshaft body 4. Before clamping the crankshaft body 4, the crankshaft body 4 is transported to a specified height by the lifting plate 5, and then the crankshaft body 4 is clamped by the fixing sleeve 14 and the pressing plate 12. After the polishing of the crankshaft body 4 is completed, the clamping of the crankshaft body 4 is released by the fixing sleeve 14 and the pressing plate 12, and the crankshaft body 4 can be dropped back on the lifting plate 5 for unloading, which is convenient for loading and unloading the crankshaft body 4.

[0021] like Figure 1-6 As shown, the limiting mechanism 6 includes a first support seat 601 equidistantly installed on the rear side of the top of the lifting plate 5, and grooves 602 are equidistantly opened on the front side of the top of the lifting plate 5. The inside of the groove 602 is rotatably connected to a screw rod 603, and the outer wall of the screw rod 603 is threadedly connected to a threaded seat 604, and the top of the threaded seat 604 is connected to a second support seat 605. When positioning the crankshaft body 4, the length of the crankshaft body 4 is first controlled to control the distance between the second support seat 605 and the first support seat 601, and then the shafts at both ends of the crankshaft body 4 are respectively placed on the arc edges opened on the second support seat 605 and the top of the first support seat 601, and the position of the second support seat 605 is adjusted by the number of crankshaft necks on the crankshaft body 4, so that crankshaft bodies 4 of different lengths corresponding to different numbers of crankshaft necks can be supported.

[0022] like Figure 1-6 As shown, a slot 17 is also provided on the top of the lifting plate 5, and rotating rods 18 connected to the screw 603 are equidistantly installed inside the slot 17. The outer walls of the three groups of rotating rods 18 are transmitted by a transmission assembly 19. The rotation of the middle rotating rod 18 can be controlled by setting a driving device, and then the other two groups of rotating rods 18 can be rotated synchronously by setting the transmission assembly 19, and then the rotation of the three groups of screws 603 can be controlled to control the front and rear positions of the threaded seat 604, thereby realizing the adjustable distance between the second support seat 605 and the first support seat 601.

[0023] like Figure 1-6As shown, the grinding mechanism 9 includes a mounting seat 901 installed at the telescopic end of the piston assembly 8, the inner side of the mounting seat 901 is rotatably connected to a bidirectional threaded rod 902, the outer wall of the bidirectional threaded rod 902 is installed with an adjusting seat 903, one end of the adjusting seat 903 is connected to an arc rod 904, and the other end of the arc rod 904 is connected to an arc polishing plate 905. A motor 906 for driving the bidirectional threaded rod 902 to rotate is arranged on the top of the mounting seat 901. When it is necessary to grind the crankshaft neck, firstly, the output end of the driving device can be connected to the fixed sleeve 14 so as to rotate it. The rotation of the fixed sleeve 14 can drive the crankshaft body 4 to rotate. When each group of crankshaft necks on the crankshaft body 4 rotates to a side close to the connecting plate 7, it stops rotating. The motor 906 controls the bidirectional threaded rod 90 2 rotates so that the upper and lower adjustment seats 903 move toward each other, and the arc-shaped polishing plate 905 is driven to move toward each other through the arc-shaped rod 904 to cover the crankshaft neck. When all the crankshaft necks are covered, the driving device starts to rotate at a uniform speed, and the crankshaft neck rotates about the crankshaft axis. During the rotation, the arc-shaped polishing plate 905 is driven to synchronously rotate in orbit, and the piston assembly 8 performs piston movement during the rotation. During the rotation, the crankshaft neck slides relative to the arc-shaped polishing plate 905 with a large friction force. During this process, the arc-shaped polishing plate 905 grinds and polishes the outer wall of the crankshaft neck, and the piston assembly 8 also adjusts its position up and down when performing piston movement, so that all the crankshaft necks on the crankshaft body 4 can be grinded and polished at one time, which is efficient and easy to operate.

[0024] like Figure 1-6 As shown, one end of the connecting plate 7 is provided with limit grooves 20 at equal intervals, a fixing rod 21 is installed inside the limit groove 20, and the outer wall of the fixing rod 21 is movably connected to a limit seat 22 fixed to one end of the piston assembly 8. The setting of the limit seat 22 and the fixing rod 21 allows the piston assembly 8 to move up and down.

[0025] Working principle: When in use, the fixed sleeve 14 can be sleeved on the shaft connected to one end of the crankshaft body 4, and then the other end is extended by the electric rod 10 to squeeze the pressure plate 12, so as to clamp and fix the crankshaft body 4, and the pressure plate 12 and the T-shaped circular plate 11, and the fixed sleeve 14 and the rotating plate 13 are all rotatably connected, so that the crankshaft body 4 can be rotated while being positioned, which is convenient for subsequent grinding and polishing work. The hydraulic rod 15 can control the lifting and lowering of the lifting plate 5, so as to realize the transportation and unloading of the crankshaft body 4. Before clamping the crankshaft body 4, the crankshaft body 4 is transported to the specified height by the lifting plate 5, and then the crankshaft body is lifted by the fixed sleeve 14 and the pressure plate 12. 4 is clamped. After the polishing of the crankshaft body 4 is completed, the clamping of the crankshaft body 4 is released by the fixing sleeve 14 and the pressing plate 12, and the crankshaft body 4 can be dropped on the lifting plate 5 again for unloading, which is convenient for loading and unloading the crankshaft body 4. When positioning the crankshaft body 4, firstly, the length of the crankshaft body 4 is controlled to control the distance between the second support seat 605 and the first support seat 601, and then the shafts at both ends of the crankshaft body 4 are respectively placed on the arc edges opened at the top of the second support seat 605 and the first support seat 601. The position of the second support seat 605 is adjusted by the number of crankshaft necks on the crankshaft body 4, so that different numbers of crankshaft necks corresponding to different lengths of crankshaft bodies 4 can be supported. By setting a driving device, the middle The rotating rod 18 rotates, and then the transmission assembly 19 provided can synchronously rotate the other two groups of rotating rods 18, thereby controlling the rotation of the three groups of screw rods 603 to control the front and rear positions of the threaded seat 604, and realizing the adjustable distance between the second support seat 605 and the first support seat 601. When it is necessary to grind the crankshaft neck, firstly, the output end of the driving device can be connected to the fixed sleeve 14 so as to rotate it. The rotation of the fixed sleeve 14 can drive the crankshaft body 4 to rotate. When each group of crankshaft necks on the crankshaft body 4 rotates to one side close to the connecting plate 7, it stops rotating. The motor 906 provided controls the rotation of the bidirectional threaded rod 902 so that the upper and lower adjustment seats 903 move toward each other. The arc rod 904 drives the arc polishing plate 905 to move toward each other so as to cover the crankshaft neck. When all the crankshaft necks are covered, the driving device starts to rotate at a uniform speed, and the crankshaft neck rotates about the crankshaft axis. During the rotation, the arc polishing plate 905 is driven to synchronously rotate in orbit, and the piston assembly 8 performs piston movement during the rotation. During the rotation of the crankshaft neck, it slides relative to the arc polishing plate 905 with a large friction force. During this process, the arc polishing plate 905 will grind and polish the outer wall of the crankshaft neck, and the piston assembly 8 will also adjust its position up and down when performing piston movement, thereby achieving one-time grinding and polishing of all the crankshaft necks on the crankshaft body 4, with high work efficiency and easy operation.

[0026] It will be apparent to those skilled in the art that the invention is not limited to the details of the exemplary embodiments described above and that the invention can be implemented in other specific forms without departing from the spirit or essential features of the invention. Therefore, the embodiments should be considered exemplary and non-limiting in all respects, and the scope of the invention is defined by the appended claims rather than the foregoing description, and it is intended that all variations falling within the meaning and scope of the equivalent elements of the claims be included in the invention. Any reference numeral in a claim should not be considered as limiting the claim to which it relates.

Claims

1. An engine crankshaft grinding and polishing device, comprising a base plate (1), a support plate (2) being equidistantly mounted on the front and rear end surfaces of the top of the base plate (1), a fixing plate (3) being mounted on the top of the support plate (2), characterized in that: A rotatable crankshaft body (4) is equidistantly mounted between the two fixed plates (3); a lifting plate (5) that can be adjusted up and down is mounted at the top center of the bottom plate (1); a limiting mechanism (6) is equidistantly mounted on the top of the lifting plate (5); a connecting plate (7) is equidistantly mounted between the two fixed plates (3); a piston assembly (8) that can move up and down is equidistantly mounted at one end of the connecting plate (7); and a grinding mechanism (9) is connected to the telescopic end of the piston assembly (8).

2. The engine crankshaft grinding and polishing device according to claim 1, characterized in that: The front end surface of the fixed plate (3) at the front side is mounted with an electric rod (10) penetrating the fixed plate (3); the telescopic end of the electric rod (10) is connected to a T-shaped circular plate (11); the rear end surface of the T-shaped circular plate (11) is rotatably connected to a pressing plate (12) for pressing the crankshaft body (4); the front end surface of the fixed plate (3) at the rear side is connected to a rotating plate (13); the front end surface of the rotating plate (13) is rotatably connected to a fixing sleeve (14) sleeved on the outer wall of the shaft of the crankshaft body (4).

3. The engine crankshaft grinding and polishing device according to claim 1, characterized in that: Hydraulic rods (15) fixed to the top of the base plate (1) are installed at the centers of the two ends of the bottom of the lifting plate (5), and telescopic rods (16) fixed to the top of the base plate (1) are installed at the four corners of the bottom of the lifting plate (5).

4. The engine crankshaft grinding and polishing device according to claim 1, characterized in that: The limiting mechanism (6) comprises a first support seat (601) equidistantly mounted on the rear side of the top of the lifting plate (5); grooves (602) are equidistantly provided on the front side of the top of the lifting plate (5); a screw rod (603) is rotatably connected inside the groove (602); a threaded seat (604) is threadedly connected to the outer wall of the screw rod (603); and a second support seat (605) is connected to the top of the threaded seat (604).

5. The engine crankshaft grinding and polishing device according to claim 1, characterized in that: The top of the lifting plate (5) is also provided with a slot (17), and rotating rods (18) connected to the screw rod (603) are equidistantly installed inside the slot (17), and the outer walls of the three groups of rotating rods (18) are driven by a transmission assembly (19).

6. The engine crankshaft grinding and polishing device according to claim 1, characterized in that: The polishing mechanism (9) comprises a mounting seat (901) mounted on the telescopic end of the piston assembly (8); a bidirectional threaded rod (902) is rotatably connected to the inner side of the mounting seat (901); an adjustment seat (903) is mounted on the outer wall of the bidirectional threaded rod (902); one end of the adjustment seat (903) is connected to an arc-shaped rod (904); the other end of the arc-shaped rod (904) is connected to an arc-shaped polishing plate (905); and a motor (906) for driving the bidirectional threaded rod (902) to rotate is arranged on the top of the mounting seat (901).

7. The engine crankshaft grinding and polishing device according to claim 1, characterized in that: Limiting grooves (20) are equidistantly formed at one end of the connection plate (7), a fixing rod (21) is installed inside the limiting groove (20), and an outer wall of the fixing rod (21) is movably connected to a limiting seat (22) fixed to one end of the piston assembly (8).

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