Crankshaft fillet rolling strengthening device

Abstract

The utility model relates to the technical field of crankshaft machining, in particular to a crankshaft fillet rolling strengthening device which comprises a bottom plate, two symmetrically-arranged fixing plates are fixedly installed on the upper portion of the bottom plate, and rotating wheel discs are rotationally installed on the inner walls of the two fixing plates. A first servo motor used for driving the rotating wheel discs to rotate on the fixing plate is fixedly mounted on the outer wall of the fixing plate, sleeves are fixedly mounted on the inner walls of the two rotating wheel discs, a mounting plate is slidably arranged on the sliding rail, and second rotating discs are rotatably mounted at the two ends of the second connecting frame; and a strengthening mechanism for rolling the crankshaft is arranged between the second rotating discs. The connecting rod, the rolling wheel and the protruding block are the same in moving track, the situation that when the rolling wheel rotates to conduct rolling strengthening on the crankshaft fillet, the rolling wheel bounces off from the crankshaft, and consequently rolling strengthening is uneven is avoided, then the crankshaft fillet rolling strengthening is automatically conducted through rotation of the rolling wheel, manual operation is not needed, and the crankshaft strengthening efficiency is high.

Description

Technical Field

[0001] This utility model relates to the field of crankshaft machining technology, and in particular to a crankshaft fillet rolling strengthening device. Background Technology

[0002] The crankshaft is the most important component in an engine. It bears the force transmitted from the connecting rod and converts it into torque, which is then output through the crankshaft to drive other accessories on the engine. There are two types of crankshaft failure: journal wear and fatigue fracture. For fatigue fracture, crankshaft fillet rolling is generally used to strengthen its fatigue strength in order to meet the requirements of crankshaft use.

[0003] Existing technologies, such as the crankshaft strengthening rolling device disclosed in CN204603697U, include an upper rolling head and a lower rolling head. The upper rolling head comprises an upper rolling body and an upper rolling head guide wheel. The upper rolling body is equipped with an upper rolling head roller holder, and the upper rolling head roller holder is equipped with a set of rollers. The two ends of the rollers respectively mate with the outer circles of the two shoulders in the upper rolling head guide wheel and the journal fillet of the crankshaft. The lower rolling head includes a support roller. During the rolling process, the rotating curved surface at the end contacts the rolling protrusion line of the crankshaft journal. This technology can correct the rolling protrusion caused by plastic deformation near the journal fillet and can increase the fatigue strength of the crankshaft after rolling and improve the rolling efficiency. However, it has the following problems in use:

[0004] The above-mentioned technology cannot automatically process the crankshaft during use, which requires rotating the crankshaft so that the rolling head can roll the crankshaft. Frequent crankshaft rotation results in low efficiency of crankshaft fillet rolling. Utility Model Content

[0005] The purpose of this invention is to solve the problem that existing technologies cannot automatically roll crankshaft fillets, and to propose a crankshaft fillet rolling strengthening device.

[0006] To achieve the above objectives, the present invention adopts the following technical solution:

[0007] A crankshaft fillet rolling strengthening device includes a base plate. Two symmetrically arranged fixed plates are fixedly mounted on the upper part of the base plate. Rotating disks are rotatably mounted on the inner walls of both fixed plates. A first servo motor for driving the rotating disks to rotate on the fixed plates is fixedly mounted on the outer wall of the fixed plates. Sleeves are fixedly mounted on the inner walls of both rotating disks, and a crankshaft is commonly disposed within the two sleeves. A slide rail is fixedly mounted on the upper part of the base plate relative to the left side of the fixed plates. A mounting plate is slidably mounted on the slide rail. A second U-shaped connecting frame is fixedly mounted on the mounting plate. Second rotating disks are rotatably mounted at both ends of the second connecting frame. A strengthening mechanism for rolling the crankshaft is disposed between the second rotating disks.

[0008] Preferably, the reinforcing mechanism includes a fixed rod, the upper part of which has a through groove, a connecting rod slidably disposed in the through groove, a bracket fixedly installed at the bottom of the fixed rod, a roller rotatably installed inside the bracket, two protrusions fixedly installed on the two side walls of the bracket, and a drive motor for driving the roller to rotate is fixedly installed on the left side of the bracket relative to the lower part of the protrusion.

[0009] Preferably, the inner walls of the two second rotating disks are provided with second sliding grooves, and a lead screw is rotatably arranged in the second sliding groove. A nut is sleeved on the outer wall of the lead screw, and the outer wall of the nut is fixedly connected to the connecting rod.

[0010] Preferably, a first connecting frame is fixedly installed on the upper part of the mounting plate relative to the lower part of the second connecting frame, a first rotating disk is rotatably installed on the inner wall of the first connecting frame, a first sliding groove is opened on the inner wall of the first rotating disk, and a protrusion is slidably disposed in the first sliding groove.

[0011] Preferably, both the first connecting frame and the second connecting frame consist of a horizontal bar and two vertical bars, and a second servo motor is fixedly installed on the left outer wall of the first connecting frame and the second connecting frame.

[0012] Preferably, the second rotating disk is provided with a motor for driving the lead screw to rotate in the second slide groove.

[0013] Compared with the prior art, the present invention has the following advantages:

[0014] This invention ensures that the normal of the fixed rod is always vertically downward when it moves by making the connecting rod, roller and protrusion move in the same trajectory. This avoids the roller from bouncing off the crankshaft when it rotates to perform fillet rolling reinforcement, which would cause uneven rolling reinforcement. Then, the crankshaft is automatically reinforced by the rotation of the roller, without the need for manual operation, and the reinforcement efficiency is high. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the structure of a crankshaft fillet rolling strengthening device proposed in this utility model;

[0016] Figure 2 This is a front view schematic diagram of a crankshaft fillet rolling strengthening device proposed in this utility model;

[0017] Figure 3 This is a schematic diagram of the second rotating disk and the lead screw of a crankshaft fillet rolling strengthening device proposed in this utility model;

[0018] Figure 4 This is a schematic diagram of the bracket and rollers of a crankshaft fillet rolling strengthening device proposed in this utility model.

[0019] In the diagram: 1. Base plate; 2. Fixing plate; 3. Rotating wheel; 4. Sleeve; 5. First servo motor; 6. Crankshaft; 7. Slide rail; 8. Mounting plate; 9. First connecting frame; 10. Second servo motor; 11. First rotating disk; 12. First slide groove; 13. Protrusion; 14. Second connecting frame; 15. Second rotating disk; 16. Second slide groove; 17. Lead screw; 18. Connecting rod; 19. Fixing rod; 20. Bracket; 21. Drive motor; 22. Roller. Detailed Implementation

[0020] 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.

[0021] Reference Figures 1-4 A crankshaft fillet rolling strengthening device includes a base plate 1. Two symmetrically arranged fixed plates 2 are fixedly installed on the upper part of the base plate 1. Rotary disks 3 are rotatably installed on the inner walls of both fixed plates 2. A first servo motor 5 for driving the rotary disks 3 to rotate on the fixed plates 2 is fixedly installed on the outer wall of the fixed plates 2. Sleeves 4 are fixedly installed on the inner walls of both rotary disks 3, and a crankshaft 6 is commonly arranged inside the two sleeves 4. A slide rail 7 is fixedly installed on the upper part of the base plate 1 relative to the left side of the fixed plates 2. A mounting plate 8 is slidably arranged on the slide rail 7. A second connecting frame 14 in the shape of П is fixedly installed on the mounting plate 8. Second rotating disks 15 are rotatably installed at both ends of the second connecting frame 14. A strengthening mechanism for rolling the crankshaft 6 is arranged between the second rotating disks 15.

[0022] The reinforcing mechanism includes a fixed rod 19, with a through groove on the upper part of the fixed rod 19. A connecting rod 18 is slidably arranged in the through groove on the upper part of the fixed rod 19. A bracket 20 is fixedly installed at the bottom of the fixed rod 19. A roller 22 is rotatably installed inside the bracket 20. Two protrusions 13 are fixedly installed on both sides of the bracket 20. A drive motor 21 for driving the roller 22 to rotate is fixedly installed on the left side of the bracket 20 relative to the lower part of the protrusions 13.

[0023] The inner walls of the two second rotating disks 15 are provided with second sliding grooves 16. A lead screw 17 is rotatably installed in the second sliding groove 16. A nut is sleeved on the outer wall of the lead screw 17. The outer wall of the nut is fixedly connected to the connecting rod 18.

[0024] The upper part of the mounting plate 8 is fixedly installed with the first connecting frame 9 relative to the lower part of the second connecting frame 14. The inner wall of the first connecting frame 9 is rotatably installed with the first rotating disk 11. The inner wall of the first rotating disk 11 is provided with the first sliding groove 12, and the protrusion 13 is slidably disposed in the first sliding groove 12.

[0025] The first connecting frame 9 and the second connecting frame 14 are each composed of a horizontal bar and two vertical bars. The second servo motor 10 is fixedly installed on the left outer wall of the first connecting frame 9 and the second connecting frame 14.

[0026] The second rotating disk 15 is equipped with a motor for driving the lead screw 17 to rotate in the second slide groove 16. When the lead screw 17 rotates, it drives the connecting rod 18 to move upward, and then the fixed rod 19 synchronously drives the protrusion 13 on the bracket 20 to move upward. When the second servo motor 10 drives the first rotating disk 11 and the second rotating disk 15 to rotate, the movement trajectory of the connecting rod 18 and the protrusion 13 is the same, ensuring that the normal of the fixed rod 19 is always downward. This ensures that the bracket 20 always faces downward when it moves in a circle, ensuring that the roller 22 always rolls and strengthens the crankshaft 6. Furthermore, the first servo motor 5 drives the crankshaft 6 to rotate, ensuring that the roller 22 rolls and strengthens the crankshaft 6 in all aspects.

[0027] The functional principle of this utility model can be explained through the following operation methods:

[0028] By placing the crankshaft 6 inside the sleeve 4 on the inner wall of the rotating disk 3, and then turning on the first servo motor 5, the output end of the first servo motor 5 drives the rotating disk 3 to rotate, which in turn drives the sleeve 4 to rotate the crankshaft 6. Then, the mounting plate 8 slides on the slide rail 7 until it reaches the rounded corner of the crankshaft 6. Then, the motor in the second rotating disk 15 drives the lead screw 17 to rotate, which in turn drives the connecting rod 18 to move upward. The connecting rod 18 then drives the fixed rod 19 to move upward, which in turn drives the bracket 20 and the rotating roller 22 inside the bracket 20 to move upward. When the center of the connecting rod 18 moves upward to a position 5cm away from the center of the lead screw 17, the movement of the lead screw 17 stops. The distance between the center of rod 18 and the center of the lead screw is equal to the distance between the center normal of crankshaft 6 and the journal of crankshaft 6. Then, the journal of crankshaft 6 will move in a circle with the journal of crankshaft 6 as the center line. The second servo motor 10 will drive the second rotating disk 15 to make the connecting rod 18 move eccentrically around the second rotating disk 15 as the center, so that the movement trajectory of roller 22 is the same as the movement trajectory of journal of crankshaft 6. Then, by turning on the second servo motor 10 on the first connecting frame 9, the first rotating disk 11 is rotated, so that the movement trajectories of roller 22, journal of crankshaft 6 and protrusion 13 are the same. Then, when the connecting rod 18 and protrusion 13 rotate in a circle, the connecting rod 18 and protrusion 13 are always on the same plane, so that the roller 22 will not bounce off the crankshaft 6 when the roller rotates to roll and strengthen the fillet of crankshaft 6.

[0029] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. A crankshaft fillet roll-strengthening device comprising a base plate (1), characterized in that, The bottom plate (1) upper fixed installation has two symmetrical fixed plate (2), two fixed plate (2) inner wall is rotatably mounted with rotating wheel disc (3), the fixed plate (2) outer wall is fixedly installed with the first servo motor (5) for driving rotating wheel disc (3) rotates on fixed plate (2), two rotating wheel disc (3) inner wall is fixedly installed with sleeve (4), and two sleeve (4) inside is commonly provided with a crankshaft (6), the bottom plate (1) upper part is fixedly installed with slide rail (7) relative to the fixed plate (2) left side, the slide rail (7) is slidably provided with mounting plate (8), the mounting plate (8) is fixedly installed with the second connecting frame (14) of П-shaped, the second connecting frame (14) both ends rotatably installed with second rotating disc (15), the second rotating disc (15) is provided with the reinforcing mechanism for rolling pressure to crankshaft (6) between.

2. The device for roll strengthening of crankshaft fillets according to claim 1, characterized in that The reinforcing mechanism includes a fixed rod (19), a through slot is formed in the upper part of the fixed rod (19), a connecting rod (18) is slidably arranged in the through slot formed in the upper part of the fixed rod (19), a bracket (20) is fixedly installed at the bottom of the fixed rod (19), a roller (22) is rotatably installed in the bracket (20), two protrusions (13) are fixedly installed on the side walls of the bracket (20), and a drive motor (21) for driving the roller (22) to rotate is fixedly installed on the left side of the bracket (20) relative to the lower part of the protrusion (13).

3. The crankshaft fillet roll-strengthening device according to claim 2, wherein Two second rotating disc (15) inner wall all are equipped with second sliding slot (16), the second sliding slot (16) is rotatably provided with a lead screw (17), the lead screw (17) is sleeved with a nut, the nut outer wall and connecting rod (18) are fixedly connected.

4. The device for roll-strengthening of the fillet of a crankshaft according to claim 3, characterized in that The first connecting frame (9) is fixedly installed on the upper part of the mounting plate (8) relative to the lower part of the second connecting frame (14), the first connecting frame (9) is rotatably installed with a first rotating disc (11) in the inner wall, the first rotating disc (11) is provided with a first sliding slot (12) in the inner wall, and the protrusion (13) is slidably arranged in the first sliding slot (12).

5. The device for roll-strengthening of the fillet of a crankshaft according to claim 4, characterized in that The first connecting frame (9) and the second connecting frame (14) are both composed of a horizontal rod and two vertical rods, and the second servo motor (10) is fixedly installed on the outer wall of the left side of the first connecting frame (9) and the second connecting frame (14).

6. A crankshaft fillet rolling device according to claim 5, wherein The second rotating disc (15) is provided with a motor for driving the lead screw (17) to rotate in the second sliding slot (16).

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