Lifting type supporting device for crankshaft parameter measurement

Abstract

The utility model discloses a lifting type supporting device for crankshaft parameter measurement, which comprises a working table, crankshaft supporting bases are symmetrically arranged on the working table, and lifting structures for adjusting the heights of the crankshaft supporting bases are arranged at the bottoms of the crankshaft supporting bases. Sliding rail structures used for adjusting the distance between the two crankshaft supporting bases are arranged on the two sides of the lifting structure, and the crankshaft supporting bases are connected with the lifting structure and slidably connected with the sliding rail structures through the lifting structure. According to the utility model, the automatic lifting support device is designed and additionally arranged to place the crankshaft, so that the position of the engine crankshaft can be fixed, the problem that the crankshaft is directly placed on a workbench to be directly measured to generate large errors is solved, the parameter accuracy of the engine crankshaft can be improved, the height can be automatically adjusted, and the working efficiency is improved. And self-adjustment is carried out according to the height of maintenance personnel. In the crankshaft maintenance process, the crankshaft maintenance device is convenient to use and operate, good in stability and high in reliability, and precision errors are reduced.

Description

Technical Field

[0001] The utility model belongs to the technical field of engine crankshaft supporting equipment, and in particular relates to a lifting type supporting device for crankshaft parameter measurement. Background Art

[0002] The crankshaft is one of the important parts in the internal combustion engine. It is the backbone of the engine and a key part that bears impact loads and transmits power. The crankshaft is mainly composed of the front end of the crankshaft, the main journal, the connecting rod journal, the crank, the balance block, the rear end of the crankshaft, etc. Its main function is to convert the gas pressure transmitted by the piston connecting rod group into torque for external output, and can drive the valve mechanism and various other accessories of the internal combustion engine. The working environment and stress conditions of the crankshaft are very complex. When working, it is subjected to the combined effects of periodically changing gas pressure, centrifugal force and inertial force. Therefore, in the processing and manufacturing, there are high requirements for the dimensional accuracy, position accuracy and surface roughness of each part of the crankshaft.

[0003] Crankshafts are generally cast from medium carbon steel, medium carbon alloy steel or ductile iron. The quality of a crankshaft is one of the performance indicators of a car engine, and the relevant parameters of a crankshaft are one of the standards for measuring the quality of a crankshaft. The measurement accuracy of crankshaft parameters (such as shaft diameter, roundness, and cylindricity) is very high, and the general deviation is around ±0.05. Currently, most crankshaft parameter measurements are made by placing the crankshaft directly on a workbench or placing both ends of the crankshaft on a stand for measurement. Due to the different heights of the measurement personnel, it is sometimes necessary to manually adjust the placement position or height of the crankshaft. After the crankshaft is moved or relocated, it is easy for the measurement personnel to measure in different positions, which in turn causes the mean value of the measurement parameters to be inaccurate. In the subsequent maintenance of the crankshaft, the data error is large, affecting the performance of the engine. At the same time, when the crankshaft needs to be raised, the measuring tool needs to be removed frequently, which is very troublesome. Summary of the invention

[0004] In view of this, the purpose of the utility model is to propose a lifting support device for crankshaft parameter measurement to overcome the above technical problems, in order to solve the problem that the existing support bracket for crankshaft measurement cannot be automatically lifted and lowered and the height of the bracket is inconvenient to adjust.

[0005] The technical solution of the utility model is:

[0006] A lifting support device for crankshaft parameter measurement includes a workbench, on which crankshaft support bases are symmetrically arranged, a lifting structure for adjusting the height of the crankshaft support bases is arranged at the bottom of the crankshaft support bases, and slide rail structures for adjusting the distance between the two crankshaft support bases are arranged on both sides of the lifting structure. The crankshaft support base is connected to the lifting structure and is slidably connected to the slide rail structure through the lifting structure.

[0007] Furthermore, the lifting structure includes a hydraulic cylinder vertically arranged at the bottom of the crankshaft support base, the top surface of the transmission end of the hydraulic cylinder is fixedly connected to the middle position of the bottom of the crankshaft support base, and a control device for controlling the operation of the hydraulic cylinder is also provided on one side of the hydraulic cylinder; a placing table used in conjunction with the slide rail structure is also provided at the bottom of the control device and the hydraulic cylinder, and the control device and the hydraulic cylinder are fixedly connected to the placing table through a connecting block.

[0008] Furthermore, the control device is a running motor connected to the hydraulic cylinder circuit, and a stop button, an up button and a down button are provided on the running motor.

[0009] Furthermore, the slide rail structure includes a long slide rail arranged in the middle of the workbench along the length direction of the workbench, and a slide groove matching the placement table is symmetrically arranged in the middle of the long slide rail, so that the placement table can move to the left and right sides through the slide groove, and a fixing device for fixing the placement table is also provided on the top surface of the placement table close to the long slide rail.

[0010] Furthermore, the fixing device includes a fixing rod having a V-shaped structure in the forward projection, one end of the fixing rod is fixedly connected to the top surface of the placing table, and the other end extends to the outside of the long slide rail. A knob that can be tightened toward the outside of the long slide rail is also provided at the end of the fixing rod, so that the placing table is fixedly connected to the long slide rail through the adjustable tightening knob on the fixing rod.

[0011] Furthermore, at least one fixing rod is arranged on the placement table or at least two fixing rods are symmetrically arranged on the placement table.

[0012] Compared with the prior art, the beneficial effects of the utility model are:

[0013] The utility model discloses a lifting support device for crankshaft parameter measurement, including a placement table arranged on a long slide rail of a workbench, a hydraulic cylinder vertically arranged at the bottom of a crankshaft support base and a running motor for controlling the operation of the hydraulic cylinder. When in use, first adjust the distance between the two placement tables and fix them through a fixing device to facilitate the placement of the crankshaft, and then control the hydraulic cylinder to rise and fall to a height suitable for measuring the crankshaft parameters through the running motor to measure the crankshaft. The utility model designs and installs an automatic lifting lifting support device to place the crankshaft for measuring parameters (shaft diameter, roundness, cylindricity), thereby fixing the position of the engine crankshaft. The design solves the problem that the crankshaft will produce large errors when it is placed on the workbench and directly measured, and can reduce the problem of affecting the working performance of the engine and reducing the efficiency of the engine. The height can be automatically adjusted and adjusted according to the height of the maintenance personnel. The device is easy to use and easy to operate in the process of repairing the crankshaft, has good stability, high reliability, and can reduce precision errors.

[0014] Other advantages, objectives and features of the present invention will be described in the following description to some extent, and will be apparent to those skilled in the art based on the following examination and research, or can be taught from the practice of the present invention to some extent. The objectives and other advantages of the present invention can be achieved and obtained through the following description. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a three-dimensional structural schematic diagram of the utility model;

[0016] Figure 2 It is a schematic diagram of the overall structure of the lifting structure, control device and fixing device of the utility model;

[0017] Figure 3 This is a schematic diagram of the installation structure of the slide rail structure of the utility model;

[0018] Figure 4 It is a three-dimensional structural schematic diagram of the fixing device of the utility model;

[0019] Figure 5 It is a circuit diagram of the utility model.

[0020] In the figure: 1. workbench; 2. crankshaft support base; 3. hydraulic cylinder; 4. placing table; 5. connecting block; 6. running motor; 601. stop button; 602. up button; 603. down button; 7. long slide rail; 8. fixing rod; 9. adjustable tightening knob;

[0021] In the circuit diagram: L1, live wire; L2, live wire; L3, live wire; N, neutral wire; QF1, circuit breaker; FU1 and FU2, fuses; FR1, overload protector; SB1, stop button; SB2, up button; SB3, down button; KM1, up contactor; KM2, down contactor; M1, running motor; HL1, power-on indication; HL2, up indication; HL3, down indication. DETAILED DESCRIPTION

[0022] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only some embodiments of the utility model, not all embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0023] like Figure 1-4As shown, a lifting support device for crankshaft parameter measurement includes a workbench 1, on which a stainless steel crankshaft support base 2 is symmetrically arranged, the support base 2 can support both ends of the crankshaft, a lifting structure for adjusting the height of the crankshaft support base 2 is arranged at the bottom of the crankshaft support base 2, and a slide rail structure for adjusting the distance between the two crankshaft support bases 2 is arranged on both sides of the lifting structure, and the crankshaft support base 2 is connected to the lifting structure and slidably connected to the slide rail structure through the lifting structure. By setting a support device that can be lifted up and down and can adjust the distance, it is convenient to place crankshafts of different lengths and the height adjustment is convenient, and it can be flexibly adjusted according to different body heights.

[0024] The lifting structure includes a hydraulic cylinder 3 vertically arranged at the bottom of the crankshaft support base 2. The hydraulic cylinder 3 is a light hydraulic cylinder MOB30 sold on the market. The top surface of the transmission end of the hydraulic cylinder 3 is fixedly connected to the middle position of the bottom of the crankshaft support base 2. A control device for controlling the operation of the hydraulic cylinder 3 is also provided on one side of the hydraulic cylinder 3, and the control device and the hydraulic cylinder 3 are circuit-connected; a placement table 4 used in conjunction with a slide rail structure is also provided at the bottom of the control device and the hydraulic cylinder 3. The size of the placement table 4 matches the slide rail structure, and it moves left and right through the slide rail. The placement table 4 is made of stainless steel as a whole, and the control device and the hydraulic cylinder 3 are arranged on the placement table 4 through a connecting block 5.

[0025] The control device is a running motor 6 connected to the hydraulic cylinder 3 circuit. The running motor 6 can be a three-phase asynchronous motor sold on the market. A stop button 601, an up button 602 and a down button 603 are provided on the running motor 6.

[0026] The slide rail structure includes a long slide rail 7 made of stainless steel arranged in the middle position of the workbench 1 along the length direction of the workbench 1, and a slide groove matching the placement table 4 is symmetrically arranged in the middle of the long slide rail 7, so that the placement table 4 can be placed in the slide groove and move to the left and right sides through the slide groove. A fixing device for fixing the placement table 4 is also provided on the top surface of the placement table 4 close to the long slide rail 7.

[0027] The fixing device includes a fixing rod 8 of a zigzag structure in forward projection, one end of the fixing rod 8 is fixedly connected to the top surface of the placement table 4, and the other end extends to the outside of the long slide rail 7. A tightening knob 9 that can be pressed against the long slide rail 7 is also provided at the end of the fixing rod 8 located on the outside, so that the placement table 4 is fixedly connected to the long slide rail 7 through the adjustable tightening knob 9 on the fixing rod 8. At least one fixing rod 8 is arranged on the placement table 4, or at least two fixing rods are symmetrically arranged on the placement table 4.

[0028] Working process and principle of this utility model:

[0029] During the working process, the rising button SB2 controls the contactor KM1 to make the motor run in the forward direction. Through the forward and reverse principles of the circuit, the motor rises in the forward direction and descends in the reverse direction, driving the hydraulic cylinder to operate up and down. Figure 5 The four KM1s in the figure are the forward contactor coil KM1, the self-locking normally open auxiliary contact, the electrical interlocking normally closed auxiliary contact KM1 and the main contact KM1. The descending button SB3 controls the contactor KM2 to make the running motor reverse to achieve the purpose of descending. The four KM2s in the figure are the reverse contactor coil KM2, the self-locking normally open auxiliary contact, the electrical interlocking normally closed auxiliary contact KM2 and the main contact KM2. In order to avoid the two contactors of rising and falling acting at the same time and causing a phase short circuit, an electrical interlock is added to the control circuit where the two contactor coils are located: the normally closed auxiliary contact KM1 of the forward contactor is connected in series with the reverse contactor coil KM2; and the normally closed auxiliary contact KM2 of the reverse contactor is connected in series with the forward contactor coil KM1. The control circuits of the two actions of rising and falling cooperate with each other, restrict each other, and protect each other. If you need to run the motor up, press the start button SB2 to energize the forward contactor KM1 coil, close the KM1 main contact, the motor rotates forward, the device rises, and the rising indicator light HL2 lights up; the KM1 normally open auxiliary contact closes and self-locks to maintain continuous rotation; the KM1 normally closed auxiliary contact is disconnected, cutting off the reverse control circuit, which prevents the reverse start button SB3 from being pressed accidentally when the motor is rotating forward and causing a phase short circuit. If you want to run the motor down, you must first press the stop button SB1 to de-energize the forward contactor KM1 coil, and the interlocking KM1 normally closed auxiliary contact returns to the closed state. Then press the reverse start button SB3 to energize the reverse contactor KM2 coil, close the KM2 main contact, and the motor descends; the KM2 normally open auxiliary contact closes and self-locks to maintain continuous rotation; the KM2 normally closed auxiliary contact is disconnected, cutting off the forward control circuit and acting as an electrical interlock. ‎

[0030] Working principle:

[0031] (1) Start the rising of the motion motor device: HL2: The rising indicator light is on, press the rising start button SB2 → the control circuit is closed → the contactor coil KM1. The normally closed auxiliary contact of the contactor KM1 is closed and self-locked - power is on → the main contact of the contactor KM1 is closed, the motor M runs forward, and the normally closed auxiliary contact of the contactor KM1 is disconnected, cutting off the reverse control circuit and achieving interlocking;

[0032] (2) Stop: The HL1 indicator light is on, press the normally closed button SB1 → disconnect all control circuits → contactor coil KM1. The self-locking contact of contactor KM1 resets and disconnects the power → the main contact of contactor KM1 is disconnected;

[0033] The motor stops running, the interlocking contact of contactor KM1 is reset and closed, and the interlocking contact of contactor KM2 is released to prepare for reversing.

[0034] (3) Start of descent: HL3 indicator light is on, press reverse start button SB3 → control circuit is closed → contactor coil KM. Normally open auxiliary contact of contactor KM2 is closed and self-locked, power is on → main contact of contactor KM2 is closed, normally closed auxiliary contact of contactor KM2 is disconnected, cut off the forward control circuit, and realize interlocking motor M descent operation.

[0035] The preferred embodiments of the utility model disclosed above are only used to help explain the utility model. The preferred embodiments do not describe all the details in detail, nor do they limit the utility model to the specific implementation methods described. Obviously, many modifications and changes can be made according to the content of this specification. This specification selects and specifically describes the embodiments in order to better explain the principles and practical applications of the utility model, so that technicians in the relevant technical field can well understand and use the utility model.

Claims

1. A lifting support device for crankshaft parameter measurement, comprising a workbench (1), on which a crankshaft support base (2) is symmetrically arranged, characterized in that: At the bottom of the crankshaft support base (2), a lifting structure for adjusting the height of the crankshaft support base (2) is provided. On both sides of the lifting structure, a slide rail structure for adjusting the distance between the two crankshaft support bases (2) is provided. The crankshaft support base (2) is connected to the lifting structure and is slidably connected to the slide rail structure through the lifting structure.

2. The lifting support device for crankshaft parameter measurement according to claim 1 is characterized in that: The lifting structure includes a hydraulic cylinder (3) vertically arranged at the bottom of the crankshaft support base (2). The top surface of the transmission end of the hydraulic cylinder (3) is fixedly connected to the middle position of the bottom of the crankshaft support base (2). On one side of the hydraulic cylinder (3), a control device for controlling the operation of the hydraulic cylinder (3) is also provided. At the bottom of the control device and the hydraulic cylinder (3), a placement table (4) used in cooperation with the slide rail structure is further provided. The control device and the hydraulic cylinder (3) are fixedly connected to the placement table (4) through a connecting block (5).

3. The lifting support device for crankshaft parameter measurement according to claim 2 is characterized in that: The control device is a running motor (6) electrically connected to the hydraulic cylinder (3). A stop button (601), a rising button (602), and a descending button (603) are provided on the running motor (6).

4. The lifting support device for crankshaft parameter measurement according to claim 2 is characterized in that: The slide rail structure includes a long slide rail (7) arranged in the middle of the workbench (1) along the length direction of the workbench (1). Symmetrically arranged in the middle of the long slide rail (7) are chutes that match the placement table (4), enabling the placement table (4) to move left and right through the chutes. On one side of the top surface of the placement table (4) close to the long slide rail (7), a fixing device for fixing the placement table (4) is further provided.

5. The lifting support device for crankshaft parameter measurement according to claim 4 is characterized in that: The fixing device includes a fixing rod (8) whose front projection is in a ∩-shaped structure. One end of the fixing rod (8) is fixedly connected to the top surface of the placement table (4), and the other end extends to the outside of the long slide rail (7). At the end of the fixing rod (8), an adjustable tightening knob (9) that can be tightened towards the outside of the long slide rail (7) is further provided, enabling the placement table (4) to be fixedly connected to the long slide rail (7) through the adjustable tightening knob (9) on the fixing rod (8).

6. The lifting support device for crankshaft parameter measurement according to claim 5, characterized in that: The fixing rod (8) is provided at least one on the placement table (4) or at least two are symmetrically arranged on the placement table (4).

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