Crankshaft keyway symmetry degree detection device

Abstract

A crankshaft keyway symmetry degree detection device belongs to the crankshaft detection technology field, the upper surface of a bottom plate is provided with a pressing clamp, an angular positioning mechanism, two main shaft supporting blocks, a standard component and a measuring unit, the two main shaft supporting blocks are fixedly arranged on the upper surface of the bottom plate in parallel, and the pressing clamp is arranged on the left side of the rear main shaft supporting block. The angular positioning mechanism is located on the right side of the rear main shaft supporting block and slidably arranged on the bottom plate, the standard part is located in front of the front main shaft supporting block, a key groove is formed in the left side of the standard part, the standard part is fixedly connected with the bottom plate, and the measuring unit is located on the left side of the front main shaft supporting block. According to the utility model, high-precision measurement can be completed in a short time, and the device is especially suitable for on-site rapid detection requirements. And the tedious step of repeatedly selecting keys with proper sizes in the traditional metering measurement is avoided, the measurement time is further saved, and the operation convenience is improved.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the technical field of crankshaft detection, and particularly relates to a crankshaft key groove symmetry detection device. BACKGROUND

[0002] The detection of the symmetry of the crankshaft key groove is a key link in the production and maintenance of an engine, and the common detection schemes currently mainly include three-coordinate measurement and on-site dial measurement. The three-coordinate measurement is known for high precision and high reliability, can comprehensively obtain the geometric parameters of the crankshaft, and is suitable for laboratory or high-precision detection scenes, but has the defects of long measurement time and high equipment cost, and is not suitable for rapid on-site detection. In comparison, the on-site dial measurement has simple equipment and low cost, but needs manual alignment and centering, is complicated to operate and time-consuming, and is affected by the technical level of the operator, so the measurement precision is often difficult to guarantee, especially in complex working conditions, errors are prone to occur, and therefore, the utility model provides a crankshaft key groove symmetry detection device to solve the above technical problems. SUMMARY

[0003] In view of the defects of the prior art described above, the utility model aims to provide a crankshaft key groove symmetry detection device to solve the problem that in the prior art, when the crankshaft is measured by dialing, manual alignment and centering are needed, the operation is complicated and time-consuming, and the measurement precision is often difficult to guarantee due to the influence of the technical level of the operator.

[0004] To achieve the above object, the utility model provides the following technical scheme.

[0005] A crankshaft key groove symmetry detection device, comprising a bottom plate, a pressing clamp, an angular positioning mechanism, two main shaft support blocks, a standard part and a measurement unit are installed on the upper surface of the bottom plate, the two main shaft support blocks are fixedly installed in parallel on the upper surface of the bottom plate, the pressing clamp is located on the left side of the rear main shaft support block, and is fixedly connected between the pressing clamp and the bottom plate, the angular positioning mechanism is located on the right side of the rear main shaft support block, and is slidingly arranged on the bottom plate, the standard part is located in front of the front main shaft support block, and a key groove is formed on the left side of the standard part, and the standard part is fixedly connected with the bottom plate, and the measurement unit is located on the left side of the front main shaft support block, and is slidingly arranged on the bottom plate.

[0006] In the technical scheme, the angular positioning mechanism comprises a guide rail A fixedly installed on the upper surface of the bottom plate and a limiting block, a sliding table A is slidingly installed in the guide rail A, an L-shaped support plate is installed on the side of the sliding table A close to the main shaft support block, a V-shaped support block is fixedly installed on the side of the L-shaped support plate close to the main shaft support block, an operating handle is screw-connectedly installed on the side of the L-shaped support plate away from the main shaft support block, and the outer surface of the operating handle is fixedly installed with a limiting rod.

[0007] In the technical scheme, the upper surface of the bottom plate is fixedly installed with a track plate, the measuring unit comprises a base, the base is slidingly installed in the track plate, an supporting column is fixedly installed on the upper surface of the base, a supporting block is installed on the upper end of the supporting column, the supporting block is perpendicular to the supporting column, and a micrometer is fixedly installed on the right end of the supporting block.

[0008] In the technical scheme, the right surface of the supporting column is fixedly installed with a guide rail B, a sliding table B is slidingly installed in the guide rail B, an L-shaped key is fixedly installed on the right surface of the sliding table B, the right end of the L-shaped key is parallel to the supporting block, and the right end of the L-shaped key is located right behind the key groove of the standard part.

[0009] In the technical scheme, the front and rear surfaces of the bottom plate are fixedly installed with handles.

[0010] Compared with the prior art, the crankshaft key groove symmetry detection device has the beneficial effects that:

[0011] Compared with the traditional three-coordinate measurement and dial measurement method, the detection efficiency is significantly improved through optimization of the measurement process and structural design, high-precision measurement can be completed in a short time, and the device is particularly suitable for on-site rapid detection requirements. Secondly, through the design of high-precision mechanical structure, such as the angular positioning mechanism and the stable measuring unit, the high-precision measurement process is ensured, and the influence of human error is reduced. In addition, the device adopts the cooperation design of the L-shaped key and the standard part, avoids the cumbersome steps of repeatedly selecting the appropriate size key in the traditional dial measurement, further saves the measurement time, and improves the operation convenience. BRIEF DESCRIPTION OF DRAWINGS

[0012] Figure 1 It is a three-dimensional structure schematic view of the utility model.

[0013] Figure 2 It is a front view structure schematic view of the utility model.

[0014] Figure 3 It is a structure schematic view when the utility model is used.

[0015] Figure 4 It is Figure 1 It is a detail view at a in the middle.

[0016] Figures 1-4 In the figure, 1 is a base plate; 11 is a handle; 12 is a track plate; 2 is a pressing clamp; 3 is an angular positioning mechanism; 31 is a guide rail A; 32 is a limiting block; 33 is a sliding table A; 34 is an L-shaped support plate; 341 is a V-shaped support block; 35 is an operation handle; 36 is a limiting rod; 4 is a main shaft support block; 5 is a standard part; 6 is a measuring unit; 61 is a base; 62 is a support column; 63 is a support block; 64 is a micrometer; 65 is a guide rail B; 66 is a sliding table B; and 67 is an L-shaped key. DETAILED DESCRIPTION

[0017] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work fall within the scope of the present application.

[0018] In the embodiments, front, back, left, right, up and down are described with reference to the base surface. Please refer to the drawings. Figure 1 As shown in the drawings, Figures 1-4 The present application provides a technical solution:

[0019] A crankshaft key groove symmetry detection device, comprising a base plate 1 with a handle 11 fixedly installed on the front and back surfaces, and a pressing clamp 2, an angular positioning mechanism 3, two main shaft support blocks 4, a standard part 5 and a measuring unit 6 installed on the upper surface of the base plate 1.

[0020] The two main shaft support blocks 4 are fixedly installed in parallel on the upper surface of the base plate 1, and the top of the main shaft support block 4 is provided with a V-shaped port, and the two main shaft support blocks 4 are used to lift the crankshaft to be detected;

[0021] The pressing clamp 2 is located on the left side of the rear main shaft support block 4 and is fixedly connected with the base plate 1 through bolts, and cooperates with the main shaft support block 4 to clamp and fix the placed crankshaft;

[0022] The angular positioning mechanism 3 is located on the right side of the rear main shaft support block 4 and is slidingly installed on the base plate 1, and is used to position the placing angle of the crankshaft;

[0023] The standard part 5 is located in front of the front main shaft support block 4 and is fixedly connected with the base plate 1 through bolts, and the left side of the standard part 5 is provided with a key groove;

[0024] The measuring unit 6 is located on the left side of the front main shaft support block 4 and is slidingly arranged on the base plate 1, and after slidingly adjusting the position of the standard part 5, it can be zeroed through the cooperation of the key groove of the standard part 5.

[0025] Combination Figure 1 and Figure 3 As shown, the angular positioning mechanism 3 includes a guide rail A31 and a limiting block 32 fixedly installed on the base plate 1. A slide table A33 is slidably installed inside the guide rail A31. An L-shaped support plate 34 is fixedly installed on the side of the slide table A33 near the main shaft support block 4 by bolts. A V-shaped support block 341 is fixedly installed on the side of the L-shaped support plate 34 near the main shaft support block 4. An operating handle 35 is screwed onto the side of the L-shaped support plate 34 away from the main shaft support block 4. A limiting rod 36 is fixedly installed on the outer surface of the operating handle 35.

[0026] After the crankshaft is placed on the two main shaft support blocks 4, rotate to adjust the position of the crankshaft and slide the adjusting slide A33 towards the crankshaft, causing the V-shaped support block 341 to engage with the outer surface of the crankshaft. Then, manually select the operation handle 35 to rotate the limiting rod 36 towards the limiting block 32. The limiting block 32 blocks the limiting rod 36 to prevent the slide A33 from moving away from the crankshaft. At this point, the crankshaft is lifted and positioned by the V-shaped support block 341, ensuring the angle of the crankshaft during testing. To further improve the stability of the crankshaft during testing, the clamping clamp 2 can be used to press the crankshaft into the main shaft support block 4 for secondary fixation, ensuring the stability of the testing process.

[0027] Combination Figure 1 and Figure 4 As shown, a track plate 12 is fixedly installed on the upper surface of the base plate 1. The measuring unit 6 includes a base 61 that is slidably installed in the track plate 12. A support column 62 is fixedly installed on the upper surface of the base 61 by bolts. A support block 63 is fixedly installed on the upper end of the support column 62 by bolts. The support block 63 is perpendicular to the support column 62, and a dial indicator 64 is fixedly installed through the right end of the support block 63.

[0028] In addition, a guide rail B65 is fixedly installed on the right surface of the support column 62, and a slide table B66 is slidably installed inside the guide rail B65. An L-shaped key 67 is fixedly installed on the right surface of the slide table B66. The right end of the L-shaped key 67 is parallel to the support block 63, and the right end of the L-shaped key 67 is located directly behind the keyway of the standard part 5. By sliding the base 61 toward the standard part 5, the position of the L-shaped key 67 can be adjusted up and down to insert it into the groove of the standard part 5 for positioning. At this time, the bottom of the dial indicator 64 is adjusted to be in contact with the upper surface of the L-shaped key 67 and then zeroed, which provides convenience for the subsequent zeroing operation of the dial indicator 64.

[0029] Measurement process:

[0030] Before measurement, the crankshaft and testing device must be cleaned, with particular attention to cleaning the crankshaft's positioning diameter and the keyway to be measured. Simultaneously, the V-shaped support block 341, main shaft support block 4, and standard part 5 of the testing device must also be cleaned. After cleaning, the crankshaft is placed as follows... Figure 3The posture shown is placed on the detection device, ensuring that one end of the connecting rod faces the angular positioning mechanism 3. Gently press the crankshaft with your hand to prevent it from lifting, and at the same time, push the operating handle 35 of the angular positioning mechanism 3 until the limiting rod 36 on the operating handle 35 exceeds the limiting block 32 on the bottom plate 1, then rotate the operating handle 35 to make the limiting rod 36 snap on the limiting block 32, and finally use the pressing clamp 2 to press down to ensure that the crankshaft is fixed firmly.

[0031] Next, slide the measuring unit 6 to the standard part 5, making the L-shaped key 67 fully snap into the key groove of the standard part 5. In this process, the base 61 of the measuring unit 6 needs to be pressed tightly with your hand to prevent the measuring unit 6 from lifting. Then, adjust the pointer of the dial gauge 64 to the zero scale line to complete the zero calibration operation.

[0032] After completing the zero calibration, move the measuring unit 6 to the vicinity of the crankshaft, and gently slide the measuring unit 6 to make the L-shaped key 67 fully snap into the key groove of the crankshaft. Again, the base 61 of the measuring unit 6 needs to be pressed tightly with your hand to prevent the measuring unit 6 from lifting. By reading the change of the indicated number on the dial gauge 64, the symmetry of the crankshaft key groove can be accurately obtained. The whole measurement process is simple and efficient, and at the same time ensures the accuracy and reliability of the measurement.

[0033] Compared with the traditional three-coordinate measurement and dial gauge measurement method, this device significantly improves the detection efficiency by optimizing the measurement process and structural design, and can complete high-precision measurement in a short time, especially suitable for on-site rapid detection needs. Secondly, through the design of high-precision mechanical structure such as the angular positioning mechanism 3 and the stable measuring unit 6, the high repeatability of the measurement process is ensured, and the influence of human error is reduced. In addition, this device adopts the cooperation design of L-shaped key 67 and standard part 5, avoiding the cumbersome steps of repeatedly selecting the appropriate size key in traditional dial gauge measurement, further saving the measurement time and improving the convenience of operation.

Claims

1. A device for detecting the symmetry of the keyways of a crankshaft, comprising a base plate (1), characterized in that, The upper surface of the bottom plate (1) is provided with a pressing clamp (2), an angular positioning mechanism (3), two main shaft supporting blocks (4), a standard part (5) and a measuring unit (6); The two main shaft supporting blocks (4) are fixedly installed in parallel on the upper surface of the bottom plate (1), the pressing clamp (2) is located on the left side of the rear main shaft supporting block (4), and the pressing clamp (2) is fixedly connected with the bottom plate (1), the angular positioning mechanism (3) is located on the right side of the rear main shaft supporting block (4), and the angular positioning mechanism (3) is slidingly arranged on the bottom plate (1), the standard part (5) is located in front of the front main shaft supporting block (4), a key groove is formed in the left side of the standard part (5), and the standard part (5) is fixedly connected with the bottom plate (1), and the measuring unit (6) is located on the left side of the front main shaft supporting block (4), and the measuring unit (6) is slidingly arranged on the bottom plate (1).

2. The device for detecting the symmetry of the crankshaft key groove according to claim 1, characterized in that, The angular positioning mechanism (3) comprises a guide rail A (31) and a limiting block (32) fixedly installed on the upper surface of the bottom plate (1), the guide rail A (31) is slidingly installed with a sliding table A (33), the sliding table A (33) is installed with an L-shaped supporting plate (34) on the side close to the main shaft supporting block (4), the L-shaped supporting plate (34) is fixedly installed with a V-shaped supporting block (341) on the side close to the main shaft supporting block (4), and the L-shaped supporting plate (34) is screw-connected with an operating handle (35) on the side away from the main shaft supporting block (4), and the outer surface of the operating handle (35) is fixedly installed with a limiting rod (36).

3. A device for detecting the symmetry of the keyways of a crankshaft according to claim 2, characterized in that The upper surface of the bottom plate (1) is fixedly installed with a track plate (12); The measuring unit (6) comprises a base (61) slidingly installed in the track plate (12), and the upper surface of the base (61) is fixedly installed with a supporting column (62), the upper end of the supporting column (62) is installed with a supporting block (63), the supporting block (63) is perpendicular to the supporting column (62), and the right end of the supporting block (63) is fixedly installed with a micrometer (64).

4. The device for detecting the symmetry of the key groove of a crankshaft according to claim 3, wherein The right surface of the supporting column (62) is fixedly installed with a guide rail B (65), the guide rail B (65) is slidingly installed with a sliding table B (66), the right surface of the sliding table B (66) is fixedly installed with an L-shaped key (67), the right end of the L-shaped key (67) is parallel to the supporting block (63), and the right end of the L-shaped key (67) is located directly behind the key groove of the standard part (5).

5. The device for detecting the symmetry of the key groove of a crankshaft according to claim 1, wherein The front and rear surfaces of the bottom plate (1) are fixedly installed with handles (11).

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