Crankshaft connecting plate comprehensive measuring device

Abstract

The utility model discloses a kind of comprehensive measuring devices of crankshaft connecting disc, it is related to mechanical parts detection technical field, comprising: fixed plate;First measurement claw for measuring the first shaft diameter of crankshaft connecting disc, first measurement claw is fixed in fixed plate, and first measurement claw is equipped with the first positioning slot for supporting the first shaft body of crankshaft connecting disc;Second measurement claw for measuring the second shaft diameter of crankshaft connecting disc, second measurement claw is floatingly arranged in fixed plate, and second measurement claw is equipped with the second positioning slot for supporting the second shaft body of crankshaft connecting disc;Displacement sensor, be arranged in fixed plate, and displacement sensor is used to measure the floating displacement of second measurement claw;Wherein, first measurement claw and second measurement claw are equipped with pneumatic gauge. Above-mentioned comprehensive measuring device of crankshaft connecting disc, personnel skill requirement is low, production front-line staff can detect, satisfy workshop on-site mass production's nearby rapid measurement, improve detection efficiency, match mass production rhythm.

Description

Technical Field

[0001] This utility model relates to the field of mechanical parts testing technology, and in particular to a comprehensive measuring device for crankshaft connecting discs. Background Technology

[0002] Motorcycle engine multi-cylinder crankshafts are generally assembled from left and right cranks, connecting rods, crank pins, and a connecting plate. Specifically, the crankshaft connecting plate includes a first shaft and a second shaft. The center distance between the crankshaft connecting plate and the second shaft is the distance between their centers. The crankshaft connecting plate's diameter includes the diameters of both the first and second shafts. The crankshaft connecting plate requires high precision; the center distance tolerance is ±0.02mm, and the shaft diameter tolerance is within 0.015mm.

[0003] In the existing technology, the accuracy inspection of crankshaft connecting discs often relies on coordinate measuring machines, which is not only costly, but also requires specialized inspection personnel with high skill requirements. This cannot meet the needs of on-site measurement by front-line production staff and cannot match the pace of mass production.

[0004] Therefore, there are still shortcomings and deficiencies in the existing technology. How to provide a comprehensive measuring device for crankshaft connecting discs that is convenient to detect and can match the pace of mass production is a technical problem that urgently needs to be solved by those skilled in the art. Utility Model Content

[0005] The purpose of this invention is to provide a comprehensive measuring device for crankshaft connecting discs, which solves the technical problem that the accuracy detection of crankshaft connecting discs in the prior art relies on coordinate measuring machines, which is not only costly, but also requires specialized inspection personnel, which places high demands on personnel skills and cannot meet the on-site measurement needs of front-line production staff, thus failing to match the pace of mass production.

[0006] To achieve the above objectives, this utility model provides a comprehensive measuring device for crankshaft connecting discs, comprising:

[0007] Fixing plate;

[0008] A first measuring claw for measuring the first shaft diameter of the crankshaft connecting plate, the first measuring claw being fixedly mounted on the fixed plate, the first measuring claw having a first positioning groove for supporting the first shaft body of the crankshaft connecting plate;

[0009] A second measuring jaw for measuring the second shaft diameter of the crankshaft connecting disc, the second measuring jaw is floatingly disposed on the fixed plate, and the second measuring jaw is provided with a second positioning groove for supporting the second shaft body of the crankshaft connecting disc;

[0010] A displacement sensor is disposed on the fixed plate, and the displacement sensor is used to measure the floating displacement of the second measuring claw;

[0011] Both the first measuring claw and the second measuring claw are connected to a pneumatic measuring instrument.

[0012] Preferably, the second measuring claw has a mounting groove on the side near the fixing plate, and a compression spring is provided in the mounting groove, the compression spring being located between the top of the fixing plate and the end face of the mounting groove.

[0013] Preferably, the fixing plate is further fixedly provided with a positioning guide block, and the displacement sensor is installed on the positioning guide block.

[0014] Preferably, the bottom of the second measuring claw is provided with a sliding groove, and the positioning guide block is at least partially located in the sliding groove, and the second measuring claw is slidably connected to the positioning guide block through the sliding groove.

[0015] Preferably, the second measuring claw is further provided with a receiving cavity, the two ends of which are respectively connected to the second positioning groove and the sliding groove.

[0016] Preferably, the displacement sensor is at least partially located within the receiving cavity, and a gap is left between the displacement sensor and the side wall of the receiving cavity.

[0017] Preferably, the second measuring claw is further provided with a second screw, which passes through the mounting groove and is connected to the fixing plate, and the compression spring is sleeved on the outside of the second screw.

[0018] Preferably, the first measuring claw is fixed to the fixing plate by a first screw.

[0019] Preferably, the first positioning groove includes two symmetrically arranged first positioning support surfaces, which are distributed in a V-shape.

[0020] Preferably, the second positioning groove includes two symmetrically arranged second positioning support surfaces, which are distributed in a V-shape.

[0021] Compared to the aforementioned background technology, the crankshaft connecting plate integrated measuring device provided by this utility model can quickly and accurately measure the shaft diameter of the crankshaft connecting plate through the pneumatic measuring instruments of the first and second measuring claws. The center distance of the crankshaft connecting plate is calculated by combining the shaft diameter of the crankshaft connecting plate and the floating displacement data of the displacement sensor. This enables simultaneous detection of the shaft diameter and center distance of the crankshaft connecting plate, eliminating the need for specialized inspection personnel and requiring low skill levels. Production line employees can perform the inspection, meeting the needs of rapid and convenient measurement in large-scale production on the workshop floor, improving inspection efficiency and matching the pace of large-scale production. Attached Figure Description

[0022] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the provided drawings without creative effort.

[0023] Figure 1 This is a schematic diagram of the crankshaft connecting disc provided in an embodiment of the present utility model;

[0024] Figure 2 A structural schematic diagram of the crankshaft connecting disc provided in an embodiment of this utility model from another perspective;

[0025] Figure 3 This is a schematic diagram of the structure of the crankshaft connecting disc integrated measuring device provided in an embodiment of the present utility model;

[0026] Figure 4 A structural schematic diagram of the crankshaft connecting disc integrated measuring device provided in an embodiment of this utility model from another perspective;

[0027] Figure 5 A schematic diagram of the crankshaft connecting disc comprehensive measuring device during measurement provided in this embodiment of the utility model;

[0028] Figure 6 This is a schematic diagram from another perspective during the measurement of the crankshaft connecting disc integrated measuring device provided in this embodiment of the utility model.

[0029] Figures 1 to 6 Reference numerals in the attached drawings: 1. Crankshaft connecting plate; 11. First shaft body; 12. Second shaft body; 2. Fixing plate; 3. First measuring claw; 31. First positioning groove; 311. First positioning support surface; 4. Second measuring claw; 41. Second positioning groove; 411. Second positioning support surface; 42. Mounting groove; 43. Slide groove; 44. Receiving cavity; 5. Displacement sensor; 6. Compression spring; 7. Positioning guide block; 8. First screw; 9. Second screw. Detailed Implementation

[0030] 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.

[0031] To enable those skilled in the art to better understand the present invention, the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0032] This utility model provides a comprehensive measuring device for crankshaft connecting discs, which can simultaneously detect the shaft diameter and center distance of crankshaft connecting disc 1 without the need for specialized inspection personnel, has low skill requirements, and is suitable for mass production.

[0033] Please refer to this as well. Figures 1 to 6 The crankshaft connecting disc comprehensive measuring device provided by this utility model includes:

[0034] Fixing plate 2;

[0035] A first measuring claw 3 is used to measure the first shaft diameter of the crankshaft connecting plate 1. The first measuring claw 3 is fixedly mounted on the fixed plate 2. The first measuring claw 3 is provided with a first positioning groove 31 for supporting the first shaft body 11 of the crankshaft connecting plate 1.

[0036] The second measuring claw 4 is used to measure the second shaft diameter of the crankshaft connecting plate 1. The second measuring claw 4 is floatingly mounted on the fixed plate 2. The second measuring claw 4 is provided with a second positioning groove 41 for supporting the second shaft body 12 of the crankshaft connecting plate 1.

[0037] Displacement sensor 5 is mounted on fixed plate 2. Displacement sensor 5 is used to measure the floating displacement of second measuring claw 4.

[0038] Both the first measuring jaw 3 and the second measuring jaw 4 are connected to pneumatic measuring instruments. A pneumatic measuring instrument is a non-contact precision measuring instrument based on pneumatic principles. It achieves length measurement through airflow signal conversion and is suitable for rapid detection of parameters such as inner diameter, outer diameter, thickness, and shape error.

[0039] During measurement, the crankshaft connecting plate 1 is placed in the integrated measuring device provided in this embodiment. The first shaft 11 of the crankshaft connecting plate 1 is located in the first positioning groove 31 of the first measuring claw 3, and the second shaft 12 of the crankshaft connecting plate 1 is located in the second positioning groove 41 of the second measuring claw 4. Both the first measuring claw 3 and the second measuring claw 4 are connected to a pneumatic measuring instrument. The shaft diameter of the first shaft 11 and the shaft diameter of the second shaft 12 are quickly and accurately measured by the pneumatic measuring instrument.

[0040] The center distance measurement of crankshaft connecting disc 1 relies on the combined calculation of the floating displacement data of displacement sensor 5 and the shaft diameter measurement value. Based on the d1 and d2 values ​​measured by the first measuring claw 3 and the second measuring claw 4 respectively, and the value measured by displacement sensor 5, a systematic error analysis is performed on d1 and d2 due to the influence of changes in shaft diameter and the value measured by displacement sensor 5 to obtain the accurate value of the center distance.

[0041] The crankshaft connecting plate integrated measuring device provided by this utility model is not only low in cost, but also can simultaneously detect the shaft diameter and center distance of the crankshaft connecting plate 1. It does not require specialized testing personnel and has low skill requirements. Production line employees can perform the testing, which meets the needs of rapid measurement in the workshop during mass production, improves testing efficiency, and matches the pace of mass production.

[0042] In some embodiments, please refer to the following: Figures 3 to 6 The second measuring claw 4 has a mounting groove 42 on the side near the fixed plate 2. A compression spring 6 is provided in the mounting groove 42. The compression spring 6 is located between the top of the fixed plate 2 and the end face of the mounting groove 42.

[0043] There are two mounting slots 42, located on both sides of the bottom of the second measuring claw 4. By setting a compression spring 6, the second measuring claw 4 is floatingly mounted on the fixed plate 2, so that the accurate value of the center distance can be calculated based on the d1 and d2 values ​​measured by the first measuring claw 3 and the second measuring claw 4 respectively, and the floating displacement value of the second measuring claw 4 measured by the displacement sensor 5.

[0044] In some embodiments, please refer to the following: Figures 3 to 6 The fixed plate 2 is also fixedly provided with a positioning guide block 7, and the displacement sensor 5 is installed on the positioning guide block 7.

[0045] When the second measuring claw 4 floats, the displacement sensor 5 does not float with the second measuring claw 4, so the floating displacement of the second measuring claw 4 can be accurately measured by the displacement sensor 5 installed on the positioning guide block 7.

[0046] In some embodiments, please refer to the following: Figures 3 to 6 The bottom of the second measuring claw 4 is provided with a sliding groove 43, and the positioning guide block 7 is at least partially located in the sliding groove 43. The second measuring claw 4 is slidably connected to the positioning guide block 7 through the sliding groove 43.

[0047] The slide groove 43 extends vertically, and the positioning guide block 7 is slidably connected to the slide groove 43. Through the cooperation of the slide groove 43 and the positioning guide block 7, when the second measuring claw 4 floats under the action of the compression spring 6, the displacement of the second measuring claw 4 in other directions can be restricted, the floating of the second measuring claw 4 can be guided, and the second measuring claw 4 can be ensured to float in the vertical direction, thereby ensuring the accuracy of the floating displacement of the second measuring claw 4 measured by the displacement sensor 5.

[0048] The cross-section of the positioning guide block 7 is rectangular. The cross-sectional shape of the positioning guide block 7 is adapted to the shape of the slide groove 43, so as to play a positioning and guiding role.

[0049] In some embodiments, please refer to the following: Figures 3 to 6The second measuring claw 4 is also provided with a receiving cavity 44, and the two ends of the receiving cavity 44 are respectively connected to the second positioning groove 41 and the sliding groove 43.

[0050] In some embodiments, please refer to the following: Figures 1 to 6 The displacement sensor 5 is located at least partially inside the receiving cavity 44, and a gap is left between the displacement sensor 5 and the side wall of the receiving cavity 44.

[0051] The gap between the displacement sensor 5 and the side wall of the receiving cavity 44 ensures that the floating of the second measuring claw 4 will not affect the displacement sensor 5, thus guaranteeing the accuracy of the floating displacement of the second measuring claw 4 measured by the displacement sensor 5.

[0052] In some embodiments, please refer to the following: Figures 3 to 6 The second measuring claw 4 is also equipped with a second screw 9, which passes through the mounting groove 42 and connects to the fixing plate 2. A compression spring 6 is sleeved on the outside of the second screw 9. Specifically, the second screw 9 is interference-fitted with the fixing plate 2 and clearance-fitted with the second measuring claw 4. The second screw 9 enables a floating connection between the second measuring claw 4 and the fixing plate 2, ensuring structural stability and providing guidance to ensure that the second measuring claw 4 floats vertically, reducing errors caused by the offset of the second measuring claw 4.

[0053] In some embodiments, please refer to the following: Figures 3 to 6 The first measuring claw 3 is fixed to the fixed plate 2 by the first screw 8.

[0054] There are two first screws 8, which are symmetrically distributed on both sides of the first measuring claw 3. The first measuring claw 3 is reliably fixed to the fixing plate 2 by the first screws 8 on both sides of the first measuring claw 3.

[0055] In some embodiments, please refer to the following: Figures 3 to 6 The first positioning groove 31 includes two symmetrically arranged first positioning support surfaces 311, which are distributed in a V-shape.

[0056] When the crankshaft connecting plate 1 is placed in the integrated measuring device provided in this embodiment, the first shaft 11 is located in the first positioning groove 31 of the first measuring claw 3, and the two first positioning support surfaces 311 respectively abut against the bottom sides of the first measuring claw 3, thereby positioning and supporting the first shaft 11.

[0057] In some embodiments, please refer to the following: Figures 3 to 6 The second positioning groove 41 includes two symmetrically arranged second positioning support surfaces 411, which are distributed in a V-shape.

[0058] When the crankshaft connecting plate 1 is placed in the integrated measuring device provided in this embodiment, the second shaft 12 is located in the second positioning groove 41 of the second measuring claw 4, and the two second positioning support surfaces 411 respectively abut against the bottom sides of the second measuring claw 4, thereby positioning and supporting the second shaft 12.

[0059] Specifically, the crankshaft connecting disc comprehensive measuring device provided by this utility model includes the following process for measuring the center distance of the crankshaft connecting disc 1:

[0060] 1. Standard parts calibration

[0061] With center distance as The shaft diameters are respectively and The standard part is installed into the crankshaft connecting plate integrated measuring device, and the first measuring jaw 3 and the second measuring jaw 4 support and position the standard part; the displacement sensor 5 records the position at this time as the reference zero point. =0).

[0062] 2. Measurement of the test piece

[0063] After the workpiece to be tested is loaded into the crankshaft connecting plate integrated measuring device, the shaft diameter is measured by the first measuring jaw 3. The shaft diameter is measured by the second measuring claw 4. The floating displacement of the second measuring claw 4 is measured by the displacement sensor 5. .in, for and The difference, for and The difference.

[0064] 3. Center Distance Calculation

[0065] Center distance of the test piece ,in, The floating displacement is directly measured by displacement sensor 5; This is a compensation term for shaft diameter deviation (used to eliminate V-type positioning error). , For the compensation coefficient ( , The angle θ of the V-groove determines the position; typically, when θ = 90°, = =0.707).

[0066] In some embodiments, the crankshaft connecting plate comprehensive measuring device provided by this utility model further includes a control device and a display device. The first measuring jaw 3 and the second measuring jaw 4 measure the shaft diameter of the crankshaft connecting plate 1 using a pneumatic measuring instrument. and Then, the measurement result is converted into a digital signal, which is transmitted to the control device. The measured shaft diameter value is compared with the required value, and the measured shaft diameter value is displayed on the display device. If the tolerance between the measured shaft diameter value and the required value is within the tolerance range, it is displayed in green; if it exceeds the tolerance range, it is displayed in red and an alarm is triggered.

[0067] After the center distance of crankshaft connecting plate 1 is calculated by the control system, the display device displays the value of the center distance. The value of the center distance is compared with the required value. If the tolerance between the value of the center distance and the required value is within the tolerance range, it is displayed in green. If it exceeds the tolerance range, it is displayed in red and an alarm is triggered.

[0068] It should be noted that in this specification, relational terms such as first and second are used only to distinguish one entity from several other entities, and do not necessarily require or imply any such actual relationship or order between these entities.

[0069] This article uses specific examples to illustrate the principles and implementation methods of this utility model. The descriptions of the above embodiments are only for the purpose of helping to understand the method and core ideas of this utility model. It should be noted that for those skilled in the art, several improvements and modifications can be made to this utility model without departing from the principles of this utility model, and these improvements and modifications also fall within the protection scope of this utility model.

Claims

1. A comprehensive measuring device for crankshaft connecting discs, characterized in that, include: Fixing plate (2); A first measuring claw (3) for measuring the first shaft diameter of the crankshaft connecting disc (1), the first measuring claw (3) is fixedly mounted on the fixing plate (2), and the first measuring claw (3) is provided with a first positioning groove (31) for supporting the first shaft body (11) of the crankshaft connecting disc (1); A second measuring claw (4) for measuring the second shaft diameter of the crankshaft connecting disc (1), the second measuring claw (4) is floating on the fixed plate (2), and the second measuring claw (4) is provided with a second positioning groove (41) for supporting the second shaft body (12) of the crankshaft connecting disc (1); A displacement sensor (5) is provided on the fixed plate (2), and the displacement sensor (5) is used to measure the floating displacement of the second measuring claw (4); Both the first measuring claw (3) and the second measuring claw (4) are connected to a pneumatic measuring instrument.

2. The crankshaft connecting disc comprehensive measuring device according to claim 1, characterized in that, The second measuring claw (4) has a mounting groove (42) on the side near the fixing plate (2), and a compression spring (6) is provided in the mounting groove (42). The compression spring (6) is located between the top of the fixing plate (2) and the end face of the mounting groove (42).

3. The crankshaft connecting disc comprehensive measuring device according to claim 1, characterized in that, The fixing plate (2) is also fixedly provided with a positioning guide block (7), and the displacement sensor (5) is installed on the positioning guide block (7).

4. The crankshaft connecting disc comprehensive measuring device according to claim 3, characterized in that, The bottom of the second measuring claw (4) is provided with a sliding groove (43), and the positioning guide block (7) is at least partially located in the sliding groove (43). The second measuring claw (4) is slidably connected to the positioning guide block (7) through the sliding groove (43).

5. The crankshaft connecting disc comprehensive measuring device according to claim 4, characterized in that, The second measuring claw (4) is also provided with a receiving cavity (44), and the two ends of the receiving cavity (44) are respectively connected to the second positioning groove (41) and the sliding groove (43).

6. The crankshaft connecting disc comprehensive measuring device according to claim 5, characterized in that, The displacement sensor (5) is at least partially located within the receiving cavity (44), and a gap is left between the displacement sensor (5) and the side wall of the receiving cavity (44).

7. The crankshaft connecting disc comprehensive measuring device according to claim 2, characterized in that, The second measuring claw (4) is also provided with a second screw (9), which passes through the mounting groove (42) and is connected to the fixing plate (2). The compression spring (6) is sleeved on the outside of the second screw (9).

8. The crankshaft connecting disc comprehensive measuring device according to claim 1, characterized in that, The first measuring claw (3) is fixed to the fixing plate (2) by the first screw (8).

9. The crankshaft connecting disc comprehensive measuring device according to claim 1, characterized in that, The first positioning groove (31) includes two symmetrically arranged first positioning support surfaces (311), which are distributed in a V-shape.

10. The crankshaft connecting disc comprehensive measuring device according to claim 1, characterized in that, The second positioning groove (41) includes two symmetrically arranged second positioning support surfaces (411), which are distributed in a V-shape.

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