A turning device for machining engine crankshaft

Abstract

This utility model discloses a crankshaft turning device for machining engines, relating to the field of crankshaft turning technology. It includes two support plates, with a migration component installed on the lower part of each plate to adjust the distance between them. A fixing plate is fixed to the upper part of each support plate, and a rotating rod is inserted into the fixing plate. The connection between the fixing plate and the rotating rod is rotatably connected via a bearing. A three-jaw chuck is fixed to one end of the rotating rod, and a turntable is fixed to the other end. The migration component drives the two-jaw and three-jaw chucks to move relative to each other, allowing them to clamp the crankshaft at both ends according to its length. A rotation drive component pulls the two-jaw and three-jaw chucks, along with the crankshaft being clamped, to rotate together. After adjusting the crankshaft angle according to machining requirements, a first hydraulic cylinder pushes a support plate upwards, causing the support plate to press tightly against the crankshaft for support. In this way, the crankshaft being machined is supported by the support plate and the two-jaw and three-jaw chucks, preventing deformation and bending during crankshaft machining.

Description

Technical Field

[0001] This utility model relates to the field of crankshaft turning technology, and in particular to a turning device for machining engine crankshafts. Background Technology

[0002] The crankshaft is one of the most important components in an internal combustion engine. It is the spine of the engine and a key component that bears impact loads and transmits power. The working environment and stress conditions of the crankshaft are very complex. During operation, it is subjected to the combined effects of periodically changing gas pressure, centrifugal force, and inertial force. Therefore, in the manufacturing process, high requirements are placed on the dimensional accuracy, positional accuracy, and surface roughness of each part of the crankshaft.

[0003] The utility model patent with authorization publication number CN221716409U discloses an automatic flipping device for crankshaft processing. When in use, the device only relies on two limiting devices to clamp the two ends of the crankshaft. However, the stress points of the crankshaft during processing are mostly in the middle or both sides of the middle. Supporting only the two ends of the crankshaft while ignoring the support of the middle part will cause the middle part of the crankshaft to bend and deform easily during processing, affecting the use of the crankshaft after processing. Utility Model Content

[0004] The purpose of this application is to provide a turning device for machining engine crankshaft, in order to solve the problem that the existing device mentioned in the background art relies only on two limiting devices to clamp the two ends of the crankshaft when in use. However, the stress points of the crankshaft during machining are mostly in the middle or on both sides of the middle. Supporting only the two ends of the crankshaft while ignoring the support of the middle part will cause the middle part of the crankshaft to be easily bent and deformed during machining, which will affect the use of the crankshaft after machining.

[0005] To achieve the above objectives, this application provides the following technical solution: a flipping device for machining engine crankshafts, comprising two pallets, a migration assembly installed on the lower part of the two pallets for adjusting the distance between the two pallets, a fixing plate fixed on the upper part of the pallets, a rotating rod inserted into the fixing plate, and the connection between the fixing plate and the rotating rod being rotatably connected by a bearing, a three-jaw chuck fixed at one end of the rotating rod, a turntable fixed at the other end of the rotating rod, the two three-jaw chucks located between the two fixing plates, an eccentric rod fixed on the side of the turntable away from the three-jaw chuck, a rotary drive assembly installed between the pallets and the eccentric rod for driving the turntable to rotate around the rotating rod, a bracket installed on the migration assembly, a chip receiving plate fixed on the upper part of the bracket, a first hydraulic cylinder installed on the upper part of the chip receiving plate, a support plate fixedly installed at the output end of the first hydraulic cylinder, and the support plate located between the two three-jaw chucks.

[0006] Furthermore, an inclined plate is fixed to the fixed plate, and the inclined plate is slidably sleeved on the outside of the chip receiving plate.

[0007] Furthermore, the rotating rod and the eccentric rod are arranged parallel to each other, and the rotating rod and the eccentric rod are not on the same horizontal axis.

[0008] Furthermore, the rotary drive assembly includes a U-shaped seat, which is fixedly mounted on the support plate. A carrier tube is rotatably connected between the relative inner walls of the U-shaped seat via a pin. A second hydraulic cylinder is mounted on the carrier tube, and a sleeve is fixedly mounted on the output end of the second hydraulic cylinder. The sleeve is sleeved around the outside of the eccentric rod.

[0009] Furthermore, the migration assembly includes a carrier box, the bracket is fixedly installed on the upper part of the carrier box, and the left and right inner walls of the carrier box are rotatably connected to lead screws via bearings. A drive motor is installed inside the carrier box, the two lead screws are located on both sides of the drive motor, and both lead screws are driven by the drive motor. A lead screw nut is installed on the lead screw, and a sliding plate is installed on the lead screw nut. The sliding plate is slidably engaged with the inner wall of the carrier box, and the two support plates are respectively installed on the two sliding plates.

[0010] Furthermore, two bases are fixed to the lower part of the carrier box, and mounting holes are provided on the bases.

[0011] In summary, the technical effects and advantages of this utility model are as follows: In this invention, a migration component drives two- or three-jaw chucks to move relative to each other, allowing the two- or three-jaw chucks to clamp both ends of the crankshaft according to its length. A rotation drive component pulls the two- or three-jaw chucks and the clamped crankshaft to rotate together. After adjusting the crankshaft angle according to processing requirements, a first hydraulic cylinder pushes the support plate upward, so that the support plate is close to the crankshaft to support it. In this way, the crankshaft being processed is supported by the support plate and the two- or three-jaw chucks, preventing deformation and bending of the crankshaft during processing.

[0012] In this invention, when adjusting the distance between the two fixed plates using the migration component, the inclined plate sleeved on the outside of the chip receiving plate can slide. In this way, the chip receiving plate, together with the two inclined plates, can effectively receive the chips falling during crankshaft machining, making chip collection more convenient. Attached Figure Description

[0013] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the accompanying drawings used in the embodiments or the prior art will be briefly introduced below.

[0014] Figure 1 This is a three-dimensional structural diagram of a turning device for machining an engine crankshaft according to an embodiment of this application; Figure 2 This is a diagram showing the positional relationship between the pallet, the rotary drive assembly, the chip receiving plate, and the support plate in the embodiments of this application. Figure 3This is a diagram showing the connection relationship between the rotating rod, the three-jaw chuck, the turntable, and the eccentric rod in an embodiment of this application. Figure 4 This is a diagram showing the connection relationship between the migration component and the tray in an embodiment of this application.

[0015] In the diagram: 1. Pallet; 2. Fixing plate; 3. Rotating rod; 4. Three-jaw chuck; 5. Turntable; 6. Eccentric rod; 7. Bracket; 8. Chip receiving plate; 9. First hydraulic cylinder; 10. Support plate; 11. Inclined plate; 12. U-shaped seat; 13. Carrier tube; 14. Second hydraulic cylinder; 15. Sleeve; 16. Carrier box; 17. Lead screw; 18. Drive motor; 19. Slide plate; 20. Base. Detailed Implementation

[0016] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0017] Example: Reference Figure 1-4 The disclosed crankshaft machining tilting device includes two support plates 1. A shifting assembly is installed on the lower part of the two support plates 1 to adjust the distance between them. A fixing plate 2 is fixed to the upper part of the support plates 1. A rotating rod 3 is inserted into the fixing plate 2, and the connection between the fixing plate 2 and the rotating rod 3 is rotatably connected via a bearing. A three-jaw chuck 4 is fixed to one end of the rotating rod 3, and a turntable 5 is fixed to the other end. The two three-jaw chucks 4 are located between the two fixing plates 2. An eccentric rod 6 is fixed to the side of the turntable 5 away from the three-jaw chucks 4. The rotating rod 3 and the eccentric rod 6 are parallel to each other, but not on the same horizontal axis. The support plates 1 and the eccentric rod 6... A rotary drive assembly is installed between the rotating components. The rotary drive assembly drives the turntable 5 to rotate around the rotating rod 3. A bracket 7 is installed on the migrating assembly. A chip receiving plate 8 is fixed on the upper part of the bracket 7. A first hydraulic cylinder 9 is installed on the upper part of the chip receiving plate 8. A support plate 10 is fixedly installed on the output end of the first hydraulic cylinder 9. A pressure sensor is installed at the connection between the first hydraulic cylinder 9 and the support plate 10. A control box is provided on the device. The pressure sensor works in conjunction with the control box to control the first hydraulic cylinder 9 to stop running the moment the support plate 10 contacts the crankshaft, so that the support plate 10 can better support the crankshaft. The support plate 10 is located between the two-jaw chuck 4. The migration component drives the two- or three-jaw chuck 4 to move relative to each other, so that the two- or three-jaw chuck 4 can clamp the two ends of the crankshaft according to the different lengths of the crankshaft. The rotation drive component can pull the two- or three-jaw chuck 4 and the clamped crankshaft to rotate together. After adjusting the crankshaft angle according to the processing requirements, the first hydraulic cylinder 9 pushes the support plate 10 upward, so that the support plate 10 is close to the crankshaft to support it. In this way, the crankshaft being processed is supported by the support plate 10 and the two- or three-jaw chuck 4 together, avoiding deformation and bending of the crankshaft during processing.

[0018] Among them, a sloping plate 11 is fixed on the fixed plate 2. The sloping plate 11 is slidably sleeved on the outside of the chip receiving plate 8. When the distance between the two fixed plates 2 is adjusted by the migration component, the sloping plate 11 sleeved on the outside of the chip receiving plate 8 can slide. In this way, the chip receiving plate 8 and the two sloping plates 11 can effectively receive the chips falling during crankshaft machining, making chip collection more convenient.

[0019] The rotary drive assembly includes a U-shaped seat 12, which is fixedly mounted on the support plate 1. A carrier tube 13 is rotatably connected between the relative inner walls of the U-shaped seat 12 via a pin. A second hydraulic cylinder 14 is mounted on the carrier tube 13. A sleeve 15 is fixedly mounted on the output end of the second hydraulic cylinder 14. The sleeve 15 is sleeved on the outside of the eccentric rod 6. The second hydraulic cylinder 14 is operated so that it adjusts its length to push the turntable 5 to rotate around the rotating rod 3. The rotating rod 3 pulls the three-jaw chuck 4 to rotate, so that the crankshaft held by the two-jaw chuck 4 can be flipped as needed for better processing operations.

[0020] The migration assembly includes a carrier box 16, a bracket 7 fixedly installed on the upper part of the carrier box 16, and lead screws 17 rotatably connected to the left and right inner walls of the carrier box 16 via bearings. A drive motor 18 is installed inside the carrier box 16, with two lead screws 17 located on both sides of the drive motor 18 and driven by the drive motor 18. A lead screw nut is installed on the lead screw 17, and a sliding plate 19 is installed on the lead screw nut. The sliding plate 19 slides with the inner wall of the carrier box 16. Two support plates 1 are respectively installed on the two sliding plates 19. Two bases 20 are fixed at the lower part of the carrier box 16. The bases 20 have mounting holes to facilitate the installation and fixation of the bases 20. The drive motor 18 drives the two lead screws 17 to rotate. The two lead screws 17 have opposite thread directions, so that the two lead screws 17 can drive the two slide plates 19 to move towards each other. In this way, the two slide plates 19 pull the two support plates 1 to move towards each other, and then drive the two three-jaw chucks 4 to move towards each other, so as to adapt to the clamping of crankshafts of different lengths.

[0021] The hydraulic cylinder is equipped with a power source, and the power source is configured as a standard feature in the field, which technicians can implement based on existing technology.

[0022] Working principle of this utility model: Powering on the device and operating the drive motor 18 causes the two lead screws 17 to rotate, which in turn pulls the two sliding plates 19 to move towards each other. This brings the two three-jaw chucks 4 closer together. The worker places the crankshaft between the two three-jaw chucks 4 until the two three-jaw chucks 4 are at both ends of the crankshaft. The drive motor 18 is then stopped, and the two three-jaw chucks 4 clamp both ends of the crankshaft. The two second hydraulic cylinders 14 are operated synchronously, and their lengths are adjusted so that the two three-jaw chucks 4 rotate around the two rotating rods 3, thereby rotating the crankshaft to a suitable machining angle. The second hydraulic cylinders 14 are then stopped, and the first hydraulic cylinder 9 is operated to push the support plate 10 upward until it contacts the bottom of the crankshaft. After the pressure sensor detects the pressure change, it transmits a signal to the control box. The control box then controls the first hydraulic cylinder 9 to stop extending immediately. At this point, the support plate 10, in conjunction with the two three-jaw chucks 4, supports the crankshaft, making it easier for the worker to process the crankshaft. When the crankshaft needs to be rotated for processing, the first hydraulic cylinder 9 can be operated to retract, causing the support plate 10 to move downwards. The two second hydraulic cylinders 14 can be operated to change their length to rotate the crankshaft. After the crankshaft is rotated to a suitable angle, the first hydraulic cylinder 9 pushes the support plate 10 upwards again to support the crankshaft. In this way, the middle and sides of the crankshaft are not easily bent or deformed during processing. The chip receiving plate 8 and the two inclined plates 11 can catch the chips falling during crankshaft processing to prevent the chips from falling into the housing 16 and to facilitate the subsequent cleaning of the chips.

[0023] Finally, it should be noted that the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A turnover device for engine crankshaft machining, comprising two supporting plates (1), characterized in that: A migration assembly is installed on the lower part of the two pallets (1) for adjusting the distance between the two pallets (1). A fixing plate (2) is fixed on the upper part of the pallet (1). A rotating rod (3) is inserted into the fixing plate (2), and the connection between the fixing plate (2) and the rotating rod (3) is rotatably connected by a bearing. A three-jaw chuck (4) is fixed at one end of the rotating rod (3), and a turntable (5) is fixed at the other end of the rotating rod (3). The two three-jaw chucks (4) are located between the two fixing plates (2), and the turntable (5) is away from the three-jaw chucks. An eccentric rod (6) is fixed on one side of the disc (4). A rotary drive assembly is installed between the pallet (1) and the eccentric rod (6). The rotary drive assembly is used to drive the turntable (5) to rotate around the rotating rod (3). A bracket (7) is installed on the migration assembly. A chip receiving plate (8) is fixed on the upper part of the bracket (7). A first hydraulic cylinder (9) is installed on the upper part of the chip receiving plate (8). A support plate (10) is fixedly installed at the output end of the first hydraulic cylinder (9). The support plate (10) is located between the two-jaw chuck (4).

2. The roll-over device for engine crankshaft machining according to claim 1, characterized in that: An inclined plate (11) is fixed on the fixed plate (2), and the inclined plate (11) is slidably sleeved on the outside of the chip receiving plate (8).

3. The roll-over device for engine crankshaft machining according to claim 1, characterized in that: The rotating rod (3) is arranged in parallel with the eccentric rod (6), and the rotating rod (3) and the eccentric rod (6) are not on the same horizontal axis.

4. The roll-over device for engine crankshaft machining according to claim 1, characterized in that: The rotary drive assembly includes a U-shaped seat (12), which is fixedly mounted on the pallet (1). A carrier tube (13) is rotatably connected between the relative inner walls of the U-shaped seat (12) by a pin. A second hydraulic cylinder (14) is mounted on the carrier tube (13). A sleeve (15) is fixedly mounted on the output end of the second hydraulic cylinder (14). The sleeve (15) is sleeved on the outside of the eccentric rod (6).

5. The roll-over device for engine crankshaft machining according to claim 1, characterized in that: The migration assembly includes a carrier box (16), and the bracket (7) is fixedly installed on the upper part of the carrier box (16). The left and right inner walls of the carrier box (16) are rotatably connected to lead screws (17) through bearings. The carrier box (16) is equipped with a drive motor (18). The two lead screws (17) are located on both sides of the drive motor (18), and both lead screws (17) are driven by the drive motor (18). A lead screw nut is installed on the lead screw (17), and a sliding plate (19) is installed on the lead screw nut. The sliding plate (19) slides with the inner wall of the carrier box (16). The two trays (1) are respectively installed on the two sliding plates (19).

6. The roll-over device for engine crankshaft machining according to claim 5, characterized in that: The lower part of the carrier box (16) is fixed with two bases (20), and the bases (20) are provided with mounting holes.

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