A device for overhauling and adjusting diesel engine crankshafts.

Abstract

This utility model belongs to the field of diesel engine technology, specifically relating to a device for the maintenance and adjustment of diesel engine crankshafts, including a crankshaft alignment base. This utility model utilizes an electric telescopic cylinder mounted on a support frame. With the cooperation of a laser displacement sensor and a control panel, the electric telescopic cylinder extends according to the position of the crankshaft journal placed on a V-plate, thereby causing a dial indicator connected to the bottom to move downwards until the dial indicator's probe abuts against the crankshaft journal. This allows for rapid and accurate numerical measurement of the crankshaft requiring maintenance, improving maintenance efficiency and avoiding numerical deviations caused by frequent manual adjustments. Furthermore, after the measurement is completed, the threaded bolt connecting the crankshaft alignment base and the support frame can be unscrewed. The slider at the bottom of the support frame slides rearward on the adjustment groove, easily exposing the space above the crankshaft placed on the V-plate, where specialized pressure tools can be used for alignment and adjustment.

Description

Technical Field

[0001] This utility model belongs to the field of diesel engine technology, specifically relating to a device for the maintenance and adjustment of diesel engine crankshaft. Background Technology

[0002] The crankshaft of a diesel engine is a core transmission component of the engine. It has a multi-bend structure, with one end connected to the piston and connecting rod assembly and the other end outputting power through the flywheel. It converts the reciprocating linear motion of the piston into rotational motion, and at the same time bears the impact force, torque generated by combustion, and its own rotational inertia. It is the "power transmission shaft" that ensures the stable operation of the diesel engine. Its material is mostly high-strength alloy forged steel or ductile iron, which must have extremely high strength, toughness, and wear resistance.

[0003] After long-term operation, crankshafts are prone to problems such as bending, twisting or journal wear due to combustion impact, alternating loads, etc. Therefore, they need to be inspected and corrected by professional maintenance equipment. The correction support frame, as the basic tooling for crankshaft maintenance, is the core carrier for realizing this process. It stably supports the crankshaft through structures such as V-blocks and positioning centers, providing a rigid reference for subsequent form and position error detection (such as radial runout and bending) and correction operations.

[0004] The surface of mainstream calibration support frames is usually equipped with dial indicators as a detection element. By contacting the dial indicator probe with the crankshaft surface, the minute displacement of the crankshaft during rotation is converted into pointer readings, which directly reflect the degree of deformation.

[0005] The dial indicator on the existing support device requires the user to manually turn the adjustment knob, repeatedly move the dial indicator bracket, and observe the contact state between the probe and the crankshaft surface. This not only requires the operator to have rich experience to avoid overpressure or poor contact of the probe, but also requires repeated adjustments when testing different journals of the crankshaft, which greatly reduces the testing efficiency. At the same time, it is difficult to guarantee the consistency of the force and position of manual adjustment. The slight difference in the contact angle and pressure of the probe may cause reading deviations in multiple tests of the same crankshaft, affecting the accuracy of the maintenance judgment. Utility Model Content

[0006] The purpose of this invention is to provide a device for the inspection and adjustment of diesel engine crankshafts. It aims to solve the problem that existing dial indicators on support devices require manual adjustment knobs, repeated movement of the dial indicator bracket, and observation of the contact between the probe and the crankshaft surface. This not only requires experienced operators to avoid overpressure or poor contact of the probe, but also necessitates repeated adjustments for different crankshaft journals, significantly reducing inspection efficiency. Furthermore, the consistency of manual adjustment force and position is difficult to guarantee; slight differences in probe contact angle and pressure during multiple inspections of the same crankshaft can lead to reading deviations, affecting the accuracy of inspection judgments.

[0007] To achieve the above objectives, this utility model provides the following technical solution: a device for the maintenance and adjustment of a diesel engine crankshaft, comprising a crankshaft alignment base, a V-shaped plate connected to the top surface of the crankshaft alignment base, an adjustment groove formed on the surface of the crankshaft alignment base, a slider slidably connected to the surface of the adjustment groove, a support frame connected to the top surface of the slider, the bottom of the support frame slidably connected to the top of the adjustment groove, the bottom surface of the support frame being threadedly connected to the top threaded groove of the crankshaft alignment base by a knob bolt, an electric telescopic cylinder installed on the top surface of the support frame, the telescopic end of the electric telescopic cylinder passing through the top transverse end of the support frame and being threadedly connected to the top of a movable frame by a bolt assembly, a limiting rod connected to the top surface of the transverse end of the movable frame, the surface of the limiting rod being movably inserted into the surface of the top transverse end of the support frame, an installation groove formed on the surface of the movable frame, a laser displacement sensor being fitted and connected to the surface of the installation groove, and connecting ears on both sides of the laser displacement sensor being threadedly connected to the surface of the movable frame by a bolt assembly.

[0008] As a preferred embodiment of the device for overhauling and adjusting the crankshaft of a diesel engine according to this utility model, the adjusting groove is a "T"-shaped groove whose shape and size are adapted to the slider.

[0009] As a preferred embodiment of the device for overhauling and adjusting a diesel engine crankshaft according to this utility model, the support frame has two sets of circular through slots longitudinally opened at the top transverse end, the shape and size of which are adapted to the telescopic end of the electric telescopic cylinder and the limiting rod.

[0010] As a preferred embodiment of the device for overhauling and adjusting a diesel engine crankshaft according to this utility model, the electric telescopic cylinder, the laser displacement sensor, and the control panel form an electrical connection structure.

[0011] As a preferred embodiment of the present invention for the maintenance and adjustment of a diesel engine crankshaft, the laser displacement sensor is electrically connected to the control panel, the control panel is mounted on the top of the support frame, the bottom surface of the movable frame is connected to the mounting bracket, and the inner wall surface of the mounting bracket is engaged with a dial indicator.

[0012] As a preferred embodiment of the device for overhauling and adjusting the crankshaft of a diesel engine according to this utility model, the front end of the mounting bracket has a circular groove whose shape and size are adapted to the dial indicator, and the two sets of dial indicators are symmetrically distributed on both sides of the laser displacement sensor.

[0013] Compared with the prior art, the beneficial effects of this utility model are:

[0014] With the help of a laser displacement sensor and control panel, an electric telescopic cylinder mounted on the support frame extends according to the position of the crankshaft journal placed on the V-plate. This causes the dial indicator connected to the bottom to move down until the dial indicator's probe touches the crankshaft journal, allowing for a quick and accurate numerical measurement of the crankshaft that needs maintenance. This improves maintenance efficiency and avoids numerical deviations caused by frequent manual adjustments. After the measurement is completed, the screw bolts threaded between the crankshaft alignment base and the support frame can be unscrewed. The slider at the bottom of the support frame slides backward in the adjustment groove, exposing the space above the crankshaft placed on the V-plate. Professional pressure tools can then be used to calibrate and adjust the crankshaft. Attached Figure Description

[0015] The accompanying drawings are provided to further illustrate the present invention and form part of the specification. They are used together with the embodiments of the present invention to explain the present invention, but do not constitute a limitation thereof. In the drawings:

[0016] Figure 1 This is a schematic diagram of the main structure of this utility model;

[0017] Figure 2 This is a schematic diagram of the structure of this utility model from below;

[0018] Figure 3 This is an exploded structural diagram of the crankshaft alignment base and support frame of this utility model;

[0019] Figure 4 This is an enlarged structural diagram of the support frame and slider of this utility model;

[0020] Figure 5 This is an enlarged structural diagram of the movable frame and electric telescopic cylinder of this utility model.

[0021] In the diagram: 1. Crankshaft alignment base; 2. V-plate; 3. Adjustment groove; 4. Slider; 5. Support frame; 6. Knob bolt; 7. Electric telescopic cylinder; 8. Moving frame; 9. Limit rod; 10. Mounting groove; 11. Laser displacement sensor; 12. Control panel; 13. Mounting bracket; 14. Dial indicator. Detailed Implementation

[0022] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0023] Please see Figures 1-5 This utility model provides the following technical solution: a device for the maintenance and adjustment of a diesel engine crankshaft, comprising a crankshaft alignment base 1, a V-shaped plate 2 connected to the top surface of the crankshaft alignment base 1, an adjustment groove 3 formed on the surface of the crankshaft alignment base 1, a slider 4 slidably connected to the surface of the adjustment groove 3, a support frame 5 connected to the top surface of the slider 4, the bottom of the support frame 5 slidably connected to the top of the adjustment groove 3, the bottom surface of the support frame 5 being threadedly connected to the top threaded groove of the crankshaft alignment base 1 by a knob bolt 6, an electric telescopic cylinder 7 installed on the top surface of the support frame 5, the telescopic end of the electric telescopic cylinder 7 passing through the top transverse end of the support frame 5 and being threadedly connected to the top of a movable frame 8 by a bolt assembly, a limiting rod 9 connected to the top surface of the transverse end of the movable frame 8, the limiting rod 9 being movably inserted into the top transverse end surface of the support frame 5, an installation groove 10 formed on the surface of the movable frame 8, a laser displacement sensor 11 being fitted and connected to the surface of the installation groove 10, and the connecting ears on both sides of the laser displacement sensor 11 being threadedly connected to the surface of the movable frame 8 by a bolt assembly.

[0024] Preferably, the adjustment groove 3 is a "T" shaped groove, the shape and size of which are adapted to the slider 4.

[0025] In practical use, the support frame 5 is pulled and slids on the adjustment groove 3 through the slider 4 connected to its bottom, thereby causing the support frame 5 located directly above the top of the V-shaped plate 2 to move backward, exposing the space at the top of the V-shaped plate 2.

[0026] Preferably, the support frame 5 has two sets of circular through slots longitudinally opened at the top horizontal end, the shape and size of which are adapted to the telescopic end of the electric telescopic cylinder 7 and the limiting rod 9.

[0027] In actual use, when the movable frame 8 moves downward, the limiting rod 9 connected to its top slides on the circular through groove opened on the top of the support frame 5, thereby guiding and limiting the movement of the movable frame 8 and preventing the position of the movable frame 8 from shifting when it moves.

[0028] Preferably, the electric telescopic cylinder 7, the laser displacement sensor 11, and the control panel 12 form an electrical connection structure.

[0029] In actual use, the switch to start the electric telescopic cylinder 7 is controlled by the control panel 12, and the position of the crankshaft journal located directly below the moving frame 8 is detected by the laser displacement sensor 11 installed on the moving frame 8.

[0030] Preferably, the laser displacement sensor 11 is electrically connected to the control panel 12, the control panel 12 is mounted on the top of the support frame 5, the bottom surface of the movable frame 8 is connected to the mounting frame 13, and the inner wall surface of the mounting frame 13 is engaged with the dial indicator 14.

[0031] In practical use, the switch to start the electric telescopic cylinder 7 is controlled by the control panel 12. The position of the crankshaft journal located directly below the moving frame 8 is detected by the laser displacement sensor 11 installed on the moving frame 8. The operating parameters of the electric telescopic cylinder 7 are controlled by the electrical signal transmitted by the detection result of the laser displacement sensor 11. When the electric telescopic cylinder 7 is started, the telescopic end extends downward, thereby driving the moving frame 8 connected to the bottom to move downward. When the moving frame 8 moves downward, the dial indicator 14 fixed at its bottom moves downward together, thereby detecting the crankshaft placed on the V-plate 2.

[0032] Preferably, the mounting bracket 13 has a circular groove at its front end, the shape and size of which are adapted to the dial gauge 14, and the two sets of dial gauges 14 are symmetrically distributed on both sides of the laser displacement sensor 11.

[0033] In actual use, the groove at the front end of the mounting bracket 13 is adapted to the size of the dial indicator 14, and a silicone anti-slip pad is adhered inside it, which increases the friction between the dial indicator 14 and the contact surface, thereby locking and fixing the dial indicator 14 in the position inside the mounting bracket 13.

[0034] Working principle: When overhauling the diesel engine crankshaft, place both ends of the crankshaft to be overhauled on the V-plate 2 respectively. Then, control the switch to start the electric telescopic cylinder 7 through the control panel 12. The laser displacement sensor 11 installed on the moving frame 8 is used to detect the position of the crankshaft journal located directly below the moving frame 8. The operating parameters of the electric telescopic cylinder 7 are controlled by the electrical signal transmitted by the detection result of the laser displacement sensor 11. When the electric telescopic cylinder 7 is started, the telescopic end extends downward, thereby driving the moving frame 8 connected to the bottom to move downward. When the moving frame 8 moves downward, the limiting rod 9 connected to its top slides on the circular through groove opened on the top of the support frame 5, thereby guiding and limiting the movement of the moving frame 8 and preventing the position of the moving frame 8 from deviating when it moves, until the connectors of the two dial gauges 14 connected to the bottom of the moving frame 8 abut against the surface of the crankshaft journal respectively, and the electric telescopic cylinder 7 stops running.

[0035] The user can then rotate the crankshaft placed on the V-plate 2 and test it using the dial indicator 14 that abuts against the surface of the crankshaft. Based on the test results, the user can perform cold pressing repair and correction. When the crankshaft placed on the V-plate 2 needs to be corrected and adjusted, the user can unscrew the screw bolts 6 that are threaded on both sides, thereby pulling the support frame 5 to slide on the adjustment groove 3 through the slider 4 connected to its bottom. This causes the support frame 5 located directly above the top of the V-plate 2 to move backward, exposing the top of the V-plate 2, which facilitates the adjustment of the crankshaft placed on the V-plate 2.

[0036] Finally, it should be noted that the above are merely preferred embodiments of this utility model and are not intended to limit the utility model. Although the 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 this utility model should be included within the protection scope of this utility model.

Claims

1. A device for overhauling and adjusting a diesel engine crankshaft, comprising a crankshaft alignment base (1), characterized in that: The top surface of the crankshaft alignment base (1) is connected to a V-shaped plate (2). An adjustment groove (3) is opened on the surface of the crankshaft alignment base (1). A slider (4) is slidably connected to the surface of the adjustment groove (3). A support frame (5) is connected to the top surface of the slider (4). The bottom of the support frame (5) is slidably connected to the top of the adjustment groove (3). The bottom surface of the support frame (5) is threadedly connected to the top threaded groove of the crankshaft alignment base (1) using a knob bolt (6). An electric telescopic cylinder (7) is installed on the top surface of the support frame (5). The cylinder (7) telescopic end passes through the top transverse end of the support frame (5) and is threadedly connected to the top of the movable frame (8) using a bolt assembly. The top surface of the transverse end of the movable frame (8) is connected to a limiting rod (9). The surface of the limiting rod (9) is movably inserted into the surface of the top transverse end of the support frame (5). An installation groove (10) is opened on the surface of the movable frame (8). A laser displacement sensor (11) is fitted and connected to the surface of the installation groove (10). The connecting ears on both sides of the laser displacement sensor (11) are threadedly connected to the surface of the movable frame (8) using a bolt assembly.

2. The device for overhauling and adjusting a diesel engine crankshaft according to claim 1, characterized in that: The adjustment groove (3) is a "T" shaped groove, and its shape and size are adapted to the slider (4).

3. The device for overhauling and adjusting a diesel engine crankshaft according to claim 1, characterized in that: The support frame (5) has two sets of circular through slots longitudinally opened at the top horizontal end, and their shape and size are adapted to the telescopic end of the electric telescopic cylinder (7) and the limiting rod (9).

4. The device for overhauling and adjusting a diesel engine crankshaft according to claim 3, characterized in that: The electric telescopic cylinder (7), the laser displacement sensor (11), and the control panel (12) form an electrical connection structure.

5. The device for overhauling and adjusting a diesel engine crankshaft according to claim 1, characterized in that: The laser displacement sensor (11) is electrically connected to the control panel (12), the control panel (12) is installed on the top of the support frame (5), the bottom surface of the movable frame (8) is connected to the mounting frame (13), and the inner wall surface of the mounting frame (13) is engaged with the dial gauge (14).

6. The device for overhauling and adjusting a diesel engine crankshaft according to claim 5, characterized in that: The mounting bracket (13) has a circular groove at its front end, the shape and size of which are adapted to the dial gauge (14), and the two sets of dial gauges (14) are symmetrically distributed on both sides of the laser displacement sensor (11).

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