Automatic polishing device for automobile crankshaft

Abstract

The utility model discloses an automatic polishing device of automobile crankshaft, including work table, the rear side of work table is rotatoryly installed with first drive screw rod, is screw -threaded to be installed with mobile seat on first drive screw rod, is rotatoryly installed with polishing machine on mobile seat, the polishing machine is connected with first telescopic cylinder, the front side of work table is rotatoryly installed with second drive screw rod, is screw -threaded to be installed with mounting bracket on second drive screw rod, is rotatoryly installed with adjusting box on mounting bracket, the adjusting box is connected with second telescopic cylinder, is rotatoryly installed with adjusting screw rod in adjusting box, is screw -threaded to be installed with adjusting seat on adjusting screw rod, the adjusting seat is connected with connecting frame, the connecting frame is connected with auxiliary support, is rotatoryly installed with auxiliary pressure wheel on auxiliary support, the utility model discloses set up auxiliary pressure wheel on the other side of polishing machine, and auxiliary pressure wheel carries out dynamic abutment to the polishing position to eliminate the deflection and vibration of crankshaft because of unilateral stress.

Description

Technical Field

[0001] This utility model relates to the technical field of automobile removal and processing, and in particular to the technical field of automatic automobile crankshaft grinding device. Background Technology

[0002] The crankshaft is a core moving component of an engine, responsible for converting the reciprocating motion of the piston into rotational motion. Its complex structure includes multiple main journals (which mate with cylinder block bearings), connecting rod journals (which mate with connecting rod bearings), and counterweights. During operation, it must withstand high-frequency alternating loads, impacts, and friction. Therefore, the crankshaft surface (especially the journals) requires extremely high precision (e.g., roundness, cylindricity, dimensional tolerances) and surface roughness. Grinding is a crucial step in crankshaft machining, removing residual machining errors (e.g., ripples, burrs) from previous machining processes (e.g., roughing and finishing), correcting journal shape accuracy, and reducing surface roughness, ultimately ensuring the crankshaft's assembly performance and service life.

[0003] Existing grinding devices, such as the patent document CN222680434U, grind a rotating crankshaft using a grinding mechanism on one side. The grinding mechanism applies radial pressure to the journal, while the crankshaft is only clamped and fixed by the two ends of the center. The journal far from the clamping point will deflect or vibrate due to insufficient rigidity, affecting the grinding effect. Summary of the Invention

[0004] The purpose of this invention is to solve the problems in the prior art by proposing an automatic crankshaft grinding device for automobiles, which can solve the above problems.

[0005] To achieve the above objectives, this utility model proposes an automatic crankshaft grinding device for automobiles, comprising a worktable, mounting seats on both sides of the worktable, a crankshaft fixedly mounted between the two mounting seats, a first drive screw rotatably mounted on the rear side of the worktable, a movable seat threaded onto the first drive screw, a grinding machine slidably mounted on the movable seat, and a first telescopic cylinder connected to the grinding machine, a second drive screw rotatably mounted on the front side of the worktable, a mounting bracket threaded onto the second drive screw, an adjusting box slidably mounted on the mounting bracket, a second telescopic cylinder connected to the adjusting box, an adjusting screw rotatably mounted inside the adjusting box, an adjusting seat threaded onto the adjusting screw, a connecting frame connected to the adjusting seat, a sliding groove formed on the adjusting box, the connecting frame slidably mounted in the sliding groove, an auxiliary support connected to the connecting frame, and an auxiliary pressure roller rotatably mounted on the auxiliary support.

[0006] Preferably, the grinding machine is equipped with a grinding wheel, and the auxiliary pressure roller is positioned to match the grinding wheel.

[0007] Preferably, the workbench is provided with a recycling trough, which is located between two mounting bases. A filter screen is provided at the bottom of the recycling trough, and a recycling bin is provided at the bottom of the filter screen.

[0008] Preferably, the first drive screw and the second drive screw are driven by the same drive motor.

[0009] Preferably, the adjusting screw is connected to an adjusting handwheel.

[0010] The beneficial effects of this utility model are as follows: By setting an auxiliary pressure roller on the other side of the grinder, the auxiliary pressure roller dynamically abuts the grinding position when the grinder rotates, thereby eliminating the deflection and vibration of the crankshaft caused by unilateral force and ensuring the grinding effect; the height of the auxiliary pressure roller can be adjusted as needed, which is very convenient.

[0011] The features and advantages of this utility model will be described in detail through embodiments and accompanying drawings. Attached Figure Description

[0012] Figure 1 This is a schematic diagram of the structure of this utility model;

[0013] Figure 2 This is a side view of the present invention.

[0014] In the diagram: 1. Workbench; 2. Mounting base; 3. First drive screw; 4. Moving base; 5. Grinding machine; 51. Grinding wheel; 6. First telescopic cylinder; 7. Second drive screw; 8. Mounting bracket; 81. Second telescopic cylinder; 9. Adjustment box; 91. Slide groove; 10. Adjustment screw; 11. Adjustment base; 12. Connecting bracket; 13. Auxiliary support; 14. Auxiliary pressure roller; 15. Recycling tank; 16. Filter screen. Detailed Implementation

[0015] See Figure 1 , Figure 2An automatic crankshaft grinding device for automobiles includes a worktable 1, with mounting seats 2 on both sides of the worktable 1. The crankshaft is fixedly installed between the two mounting seats 2. A first drive screw 3 is rotatably installed on the rear side of the worktable 1. A movable seat 4 is threaded onto the first drive screw 3. A grinding machine 5 is slidably installed on the movable seat 4. The grinding machine 5 is connected to a first telescopic cylinder 6. A second drive screw 7 is rotatably installed on the front side of the worktable 1. A mounting bracket 8 is threaded onto the second drive screw 7. An adjusting box 9 is slidably installed on the mounting bracket 8. The adjusting box 9 is connected to a second telescopic cylinder 81. An adjusting screw 10 is rotatably installed inside the adjusting box 9. An adjusting seat 11 is threaded onto the adjusting screw 10. A connecting bracket 12 is connected to the adjusting seat 11. A sliding groove 91 is opened on the adjusting box 9. The connecting bracket 12 is slidably installed in the sliding groove 91. An auxiliary support 13 is connected to the connecting bracket 12. An auxiliary pressure roller 14 is rotatably installed on the auxiliary support 13.

[0016] The grinding machine 5 is equipped with a grinding wheel 51, and the auxiliary pressure roller 14 is positioned to match the grinding wheel 51.

[0017] The workbench 1 is provided with a recycling trough 15, which is located between two mounting bases 2. The bottom of the recycling trough 15 is provided with a filter screen 16, and the bottom of the filter screen 16 is provided with a recycling box.

[0018] The first drive screw 3 and the second drive screw 7 are driven by the same drive motor.

[0019] During operation, the grinding mechanism feeds towards the journal from one side, while the pressure roller moves towards it from the opposite side until it contacts the journal surface. After the current journal is ground, the grinding mechanism and the pressure roller move away synchronously and together along the axial direction to the next journal position, repeating the above process.

[0020] The adjusting screw 10 is connected to an adjusting handwheel.

[0021] The auxiliary pressure roller is made of polyurethane or aluminum alloy with a rubber outer layer.

[0022] The above embodiments are illustrative of the present invention and are not intended to limit the present invention. Any simple modifications to the present invention are within the protection scope of the present invention.

Claims

1. An automatic crankshaft grinding device for automobiles, characterized in that: The system includes a worktable (1), with mounting seats (2) on both the left and right sides. A crankshaft is fixedly installed between the two mounting seats (2). A first drive screw (3) is rotatably mounted on the rear side of the worktable (1). A movable seat (4) is threaded onto the first drive screw (3). A grinder (5) is slidably mounted on the movable seat (4). The grinder (5) is connected to a first telescopic cylinder (6). A second drive screw (7) is rotatably mounted on the front side of the worktable (1). A mounting bracket (8) is threaded onto the second drive screw (7). An adjustment box (9) is slidably mounted on the mounting frame (8). The adjustment box (9) is connected to a second telescopic cylinder (81). An adjustment screw (10) is rotatably mounted inside the adjustment box (9). An adjustment seat (11) is threaded onto the adjustment screw (10). A connecting frame (12) is connected to the adjustment seat (11). A sliding groove (91) is opened on the adjustment box (9). The connecting frame (12) is slidably mounted in the sliding groove (91). An auxiliary support (13) is connected to the connecting frame (12). An auxiliary pressure roller (14) is rotatably mounted on the auxiliary support (13).

2. The automatic crankshaft grinding device for automobiles as described in claim 1, characterized in that: The grinding machine (5) is equipped with a grinding wheel (51), and the auxiliary pressure roller (14) is positioned to match the grinding wheel (51).

3. The automatic crankshaft grinding device for automobiles as described in claim 1, characterized in that: The workbench (1) is provided with a recycling tank (15), which is located between two mounting bases (2). The bottom of the recycling tank (15) is provided with a filter screen (16), and the bottom of the filter screen (16) is provided with a recycling box.

4. The automatic crankshaft grinding device for automobiles as described in claim 1, characterized in that: The first drive screw (3) and the second drive screw (7) are driven by the same drive motor.

5. The automatic crankshaft grinding device for automobiles as described in claim 1, characterized in that: The adjusting screw (10) is connected to an adjusting handwheel.

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