Calibrating device for engine crankshaft

Abstract

The utility model relates to the technical field of crankshaft calibration equipment, in particular to an engine crankshaft calibration device which comprises a base, a supporting seat, a sliding seat, a lever indicator and a limiting plate. The supporting bases, the sliding bases and the limiting plates are all arranged on the base in a sliding mode, the two supporting bases are oppositely arranged, the limiting plates are arranged on the outer sides of the supporting bases, and the sliding bases are arranged on the right sides of the supporting bases; the supporting seat, the sliding seat and the limiting plate slide in the same direction; the lever indicator is fixedly arranged on the sliding seat; the supporting seat comprises a lower clamping block, an upper clamping block and a supporting assembly, and the lower clamping block is in sliding connection with the base; the upper clamping block is movably arranged on the upper side of the lower clamping block through the supporting assembly so as to form clamping fit. The adjacent ends of the lower clamping block and the upper clamping block are respectively provided with a V-shaped groove. By means of the crankshaft measuring tool, a machined crankshaft can be accurately and rapidly measured so as to judge whether the crankshaft meets the standard or not.

Description

TECHNICAL FIELD

[0001] The utility model relates to crankshaft calibration equipment technical field, and the specific field is a kind of calibration device of engine crankshaft. BACKGROUND

[0002] Engine crankshaft is one of very important components in engine, for the gas force of piston and connecting rod is converted into torque output to drive the power tool connected therewith. To ensure the reliability, durability and performance stability of engine crankshaft, it is necessary to improve the anti-sudden load capacity of engine crankshaft to cope with the instantaneous high load impact that engine may encounter in the process of operation. Improving the anti-sudden load capacity of engine crankshaft needs to be optimized from material selection, structure design, manufacturing process and auxiliary system, among which, in terms of manufacturing process, ensuring the coaxiality of crankshaft main journal (i.e. the coincidence degree of each main journal center axis) is particularly important for the anti-sudden load capacity of engine crankshaft.

[0003] And the coaxiality of crankshaft main journal after being processed needs to be measured by professional calibration tool to judge whether the crankshaft meets the standard, and the prior art such as the patent with the publication number CN221802745U discloses a kind of automobile crankshaft mold calibration device, which calibrates crankshaft by setting dial gauge and V-shaped groove and limiting plate on support plate, however, the patent has the following deficiencies: although V-shaped groove and limiting plate design can adapt to different shaft diameters, it does not solve the problem of rotational freedom of crankshaft during measurement, and the crankshaft may slightly roll when contacting dial gauge, which affects the measurement accuracy (especially for crankshafts sensitive to bending degree);Limiting plate is only manually adjusted by bidirectional screw rod, lacks quick locking mechanism, and the operation efficiency is low, and the constraint of crankshaft axial offset is limited. Based on this, we propose a kind of calibration device of engine crankshaft. UTILITY MODEL CONTENT

[0004] In view of the deficiencies of the prior art, the purpose of the utility model is to provide a kind of calibration device of engine crankshaft, which can accurately and quickly measure the processed crankshaft to judge whether the crankshaft meets the standard.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a calibration device for an engine crankshaft, comprising a base, a support seat, a slide seat, a lever dial indicator, and a limiting plate; the support seat, slide seat, and limiting plate are all slidably mounted on the base, wherein two support seats are provided and arranged facing each other, the limiting plate is located on the outer side of the support seat, and the slide seat is located on the right side of the support seat; the support seat, slide seat, and limiting plate slide in the same direction; the lever dial indicator is fixedly mounted on the slide seat; the support seat includes a lower clamping block, an upper clamping block, and a support assembly, the lower clamping block being slidably connected to the base; the upper clamping block is movably mounted on the upper side of the lower clamping block via the support assembly to form a clamping fit; a V-groove is provided at one adjacent end of both the lower and upper clamping blocks.

[0006] Preferably, the support assembly includes a slide rod, a limiting block, and a spring; the lower end of the slide rod is fixedly connected to the upper end of the lower clamping block; the limiting block is fixedly disposed at the top end of the slide rod; the upper clamping block and the spring are both slidably disposed on the slide rod; the spring is compressed between the upper clamping block and the limiting block.

[0007] Preferably, the lower clamping block has an L-shaped structure, and a locking bolt is provided at its lower end; the screw of the locking bolt passes through the body of the lower clamping block and is slidably connected to the base.

[0008] Preferably, the slide includes a slider, a support rod, a mounting block, a first locking screw, and a second locking screw. The slider is slidably disposed on the base; the support rod is vertically disposed on the slider; the mounting block is slidably sleeved on the support rod by the first locking screw; a mounting groove is formed at one end of the mounting block away from the support rod; and at least part of the lever dial indicator is slidably disposed in the mounting groove by the second locking screw.

[0009] Preferably, the slider is provided with a stop element; the stop element is slidably connected to the base.

[0010] Preferably, the direction in which the mounting groove is opened is consistent with the length direction of the mounting block.

[0011] Preferably, the base is provided with a slide rail; the lower end of the lower clamping block is provided with a slide groove that cooperates with the slide rail.

[0012] Preferably, the slide rail is a trapezoidal guide rail, and the slide groove is a dovetail groove.

[0013] Preferably, the base is further provided with a guide rod and two fixing blocks; the guide rod is located between the two fixing blocks; the slider is slidably mounted on the guide rod.

[0014] Preferably, both ends of the slide rail along its length are provided with fixing pins.

[0015] Compared with the prior art, the beneficial effects of this utility model are as follows: by providing a support seat with clamping function on the slide rail, the crankshaft can be easily fixed, the crankshaft's rotational freedom is restricted during testing, and the crankshaft will not roll slightly when it contacts the dial indicator, thus ensuring measurement accuracy; by providing a sliding limit plate on one side of the support seat, the accuracy of the crankshaft's placement position can be ensured, further improving measurement accuracy. Attached Figure Description

[0016] Fig. 1 This is a schematic diagram of the overall structure of the calibration device of this utility model;

[0017] Fig. 2 This is a schematic diagram of the support structure of this utility model;

[0018] Fig. 3 This is a schematic diagram of the slide structure of this utility model.

[0019] In the diagram: 1. Base, 11. Slide rail, 12. Fixing block, 13. Guide rod; 2. Support seat, 21. Lower clamping block, 22. Upper clamping block, 23. Slide rod, 24. Limiting block, 25. Spring; 3. Slide block, 31. Slider, 32. Support rod, 33. Mounting block, 34. First locking screw, 35. Second locking screw; 4. Lever dial indicator. Detailed Implementation

[0020] The specific embodiments of this utility model are described in detail below with reference to the accompanying drawings, so that those skilled in the art can more clearly understand how to practice this utility model. Although this utility model has been described in conjunction with its preferred embodiments, these embodiments are merely illustrative and not intended to limit the scope of this utility model.

[0021] See Figs. 1-3 In one embodiment of this utility model, a crankshaft calibration device includes: a base 1, a support seat 2 and a slide seat 3 slidably disposed on the base 1, and a lever dial indicator 4 supported by the slide seat 3. Two support seats 2 are provided for fixing the crankshaft or a standard crankshaft. The lever dial indicator 4 is positioned corresponding to the support seat 2, and the lever dial indicator 4 can calibrate the machined crankshaft according to the size of the standard crankshaft.

[0022] Specifically, the base 1 includes a base plate, a slide rail 11, a fixing block 12, and a guide rod 13. There are two slide rails 11, two fixing blocks 12, and two guide rods 13. The slide rail 11 is laid on the base plate, and the guide rod 13 is located on the upper side of the base plate and to the right of the slide rail 11 via the fixing block 12. Furthermore, the length direction of the slide rail 11 is the same as the length direction of the guide rod 13. Both ends of the slide rail 11 in the length direction are provided with fixing pins to prevent the support base 2 from slipping off.

[0023] Two support seats 2 are provided, and the two support seats 2 are slidably mounted on the base plate facing each other via slide rail 11; the slidably mounted support seats 2 can be used for crankshafts of different lengths;

[0024] The support base 2 includes a lower clamping block 21, an upper clamping block 22, and a support assembly. The lower end of the lower clamping block 21 has a sliding groove that slides with the slide rail 11, and the upper part of the lower clamping block 21 has a V-shaped groove for placing the crankshaft. The upper clamping block 22 is slidably disposed on the upper side of the lower clamping block 21 through the support assembly. The lower end of the upper clamping block 22 has an inverted V-shaped groove. By adjusting the distance between the upper clamping block 22 and the lower clamping block 21, the crankshaft can be clamped.

[0025] The support assembly has two sets; the support assembly includes a slide rod 23, a limiting block 24, and a spring 25. The lower end of the slide rod 23 is fixedly connected to the upper end of the lower clamping block 21; the limiting block 24 is fixedly installed at the top of the slide rod 23; the two slide rods 23 are vertically installed on both sides of the V-groove of the lower clamping block 21; the upper clamping block 22 is slidably connected to the slide rod 23, and the upper clamping block 22 is located between the limiting block 24 and the lower clamping block 21; the spring 25 is sleeved on the slide rod 23 and is located between the limiting block 24 and the upper clamping block 22; the limiting block 24 is to prevent the spring 25 from slipping off, therefore the outer diameter of the limiting block 24 is larger than the outer diameter of the slide rod 23.

[0026] In the initial state, spring 25 is compressed, meaning that the lower clamp 21 and upper clamp 22 are pressed together by the spring 25. When calibration is required, simply lift the upper clamp 22 to widen the gap between the lower and upper clamps 21 and place the crankshaft between them. Then lower the upper clamp 22, which, under the action of spring 25, will press the crankshaft firmly. The crankshaft can then be calibrated by adjusting the dial indicator 4. The whole process is convenient and quick. In addition, during calibration, the crankshaft's rotational freedom is restricted due to the clamping action of the lower and upper clamps 22. The crankshaft will not roll slightly when it contacts the dial indicator, thus ensuring measurement accuracy.

[0027] Furthermore, this calibration device also includes a limiting plate (not shown in the figure) that is slidably disposed on the slide rail 11. During testing, the crankshaft can be precisely placed by controlling the distance between the limiting plate and one of the support seats 2 on the outer side of the two support seats 2 of the limiting plate, so as to ensure measurement accuracy.

[0028] The slide block 3 is located on the right side of the support base 2 and includes a slider 31, a support rod 32, a mounting block 33, a first locking screw 34, and a second locking screw 35. The slider 31 is slidably disposed between two fixed blocks 12 via a guide rod 13. Under external force, the slider 31 can be pushed to move back and forth. The support rod 32 is vertically disposed on the slider 31. The mounting block 33 is slidably sleeved on the support rod 32 via the first locking screw 34. Rotating the first locking screw 34 can control the horizontal height of the mounting block 33. An installation groove is provided at the end of the mounting block 33 away from the support rod 32, and the opening direction of the installation groove is consistent with the length direction of the mounting block 33. The fixed end of the lever dial indicator 4 is at least partially slidably disposed in the installation groove via the second locking screw 35. Rotating the second locking screw 35 can control the distance between the lever dial indicator 4 and the support rod 32. In other words, rotating the second locking screw 35 can adjust the distance between the lever dial indicator 4 and the workpiece to accommodate the measurement of workpieces of different sizes.

[0029] The lever dial indicator 4 in this embodiment has a rotatable probe (typically ±180°), making it suitable for measuring narrow locations that are difficult for ordinary dial indicators to reach (such as the main journal of the crankshaft and the connecting rod journal). By adjusting the direction of the probe, it can directly measure non-perpendicular surfaces (such as inclined planes and concave contours) without the need for additional fixtures, making it more flexible to use. In addition, the lever dial indicator 4 is not only suitable for calibrating the coaxiality of the crankshaft, but can also calibrate the runout and roundness of the crankshaft.

[0030] In one embodiment, the slide groove is a dovetail groove, and the slide rail 11 is a trapezoidal guide rail. The dovetail groove and the trapezoidal guide rail work together to provide high-precision and stable motion guidance.

[0031] In one embodiment, a stop element (not shown in the figure) is also provided between the slider 31 and the base plate. The stop element is used to fix the slider 31 after sliding is completed. In implementation, the stop element can be a low-cost bolt. The bolt is provided on the slider 31, and the bolt thread is threaded to the slider 31 and longitudinally passes through the slider 31 and slides between it and the upper end of the base plate. When it is necessary to fix the slider 31, simply rotate the bolt to press the bolt against the base plate to increase the friction and fix the slider 31. In this embodiment, in order to avoid the bolt scratching the base plate, a rubber block can also be provided at the lower end of the bolt to change the hard contact between the bolt and the base plate into a soft contact.

[0032] In one embodiment, to prevent the support 2 from sliding under external force during measurement and affecting the measurement effect, the lower clamping block 21 has an L-shaped structure. The lower clamping block 21 is provided with a locking bolt. The screw of the locking bolt passes through the lower clamping block 21 and is slidably connected to the base plate. Rotating the locking bolt can change the pressure between the locking bolt and the base plate, thereby adjusting the fixed state of the lower clamping block 21.

[0033] Operating instructions for this device: Before testing, place the standard crankshaft on the support base 2 with automatic clamping function, and move the limiting plate so that the limiting plate contacts one end of the standard crankshaft. Then fix the support base 2. Next, adjust the lever dial indicator 4 to the corresponding position to contact the standard crankshaft to determine the origin of the lever dial indicator 4. Take out the standard crankshaft, and place the crankshaft to be tested on the support base 2 in the same way, and make it contact the limiting plate. Manually rotate the crankshaft to be tested to perform the measurement and record the data.

[0034] This technical solution allows for easy fixing of the crankshaft by providing a support seat with clamping function on the slide rail. This restricts the crankshaft's rotational freedom during testing, preventing slight rolling when the dial indicator contacts it, thus ensuring measurement accuracy. Furthermore, by setting a sliding limit plate on one side of the support seat, the accuracy of the crankshaft's placement is ensured, further improving measurement precision.

[0035] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model and are not intended to limit it. Although this utility model has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of this utility model without departing from the spirit and scope of the technical solutions of this utility model, and all such modifications or substitutions should be covered within the scope of the claims of this utility model.

Claims

1. A calibration device for an engine crankshaft, characterized in that: The system includes a base (1), a support seat (2), a slide seat (3), a lever dial indicator (4), and a limiting plate. The support seat (2), slide seat (3), and limiting plate are all slidably mounted on the base (1). There are two support seats (2) arranged facing each other. The limiting plate is located on the outside of the support seat (2), and the slide seat (3) is located on the right side of the support seat (2). The support seat (2), slide seat (3), and limiting plate slide in the same direction. The lever dial indicator (4) is fixedly mounted on the slide seat (3). The support seat (2) includes a lower clamping block (21), an upper clamping block (22), and a support assembly. The lower clamping block (21) is slidably connected to the base (1). The upper clamping block (22) is movably mounted on the upper side of the lower clamping block (21) through the support assembly to form a clamping fit. V-grooves are opened at the adjacent ends of the lower clamping block (21) and the upper clamping block (22).

2. The calibration device for an engine crankshaft according to claim 1, characterized in that: The support assembly includes a slide rod (23), a limiting block (24), and a spring (25); the lower end of the slide rod (23) is fixedly connected to the upper end of the lower clamping block (21); the limiting block (24) is fixedly disposed at the top of the slide rod (23); the upper clamping block (22) and the spring (25) are both slidably disposed on the slide rod (23); the spring (25) is compressed between the upper clamping block (22) and the limiting block (24).

3. The calibration device for an engine crankshaft according to claim 1, characterized in that: The lower clamping block (21) has an L-shaped structure and a locking bolt at its lower end; the screw of the locking bolt passes through the body of the lower clamping block (21) and is slidably connected to the base (1).

4. The calibration device for an engine crankshaft according to claim 1, characterized in that: The slide block (3) includes a slider (31), a support rod (32), a mounting block (33), a first locking screw (34), and a second locking screw (35). The slider (31) is slidably mounted on the base (1). The support rod (32) is vertically mounted on the slider (31). The mounting block (33) is slidably mounted on the support rod (32) by the first locking screw (34). A mounting groove is provided at one end of the mounting block (33) away from the support rod (32). The lever dial indicator (4) is at least partially slidably mounted in the mounting groove by the second locking screw (35).

5. The calibration device for an engine crankshaft according to claim 4, characterized in that: The slider (31) is provided with a stop element; the stop element is slidably connected to the base (1).

6. The calibration device for an engine crankshaft according to claim 4, characterized in that: The direction of the mounting groove is consistent with the length direction of the mounting block (33).

7. The calibration device for an engine crankshaft according to claim 1, characterized in that: The base (1) is provided with a slide rail (11); the lower end of the lower clamping block (21) is provided with a groove that cooperates with the slide rail (11).

8. The calibration device for an engine crankshaft according to claim 7, characterized in that: The slide rail (11) is a trapezoidal guide rail, and the slide groove is a dovetail groove.

9. The calibration device for an engine crankshaft according to claim 4, characterized in that: The base (1) is also provided with a guide rod (13) and two fixing blocks (12); the guide rod (13) is located between the two fixing blocks (12); the slider (31) is slidably located on the guide rod (13).

10. The calibration device for an engine crankshaft according to claim 7, characterized in that: The slide rail (11) has fixing pins at both ends along its length.

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