Crankshaft crank phase angle detection device

Abstract

The utility model relates to the technical field of crankshaft detection, specifically disclose a crankshaft crank phase angle detection device, including interval and fixedly arranged flat seat and adjustable support seat, the top of flat seat is provided with dial assembly no.

Description

Technical Field

[0001] This utility model relates to the field of crankshaft testing technology, and specifically discloses a crankshaft crank phase angle testing device. Background Technology

[0002] The crankshaft is the core component of the engine that outputs power. The accuracy of the angle distribution of the crank journals around the main journal is a key factor in determining whether the engine runs smoothly. Traditional testing techniques mostly measure the external dimensions and height difference of the journals and then use function formulas to calculate the phase angle, which has the problems of large amount of measurement data and large accumulation of errors.

[0003] Chinese patent CN204115641U discloses a crankshaft phase angle detection device, including an inspection workbench, a V-shaped bracket, a guide rail, a lifting plate, a fixed bracket, a dial, and a vernier caliper. The working principle is to first install the dial indicator, the lifting plate, and the fixed bracket on the guide rail, and then find the highest point of the outer circle of each crank journal by sliding the guide rail. Then, the phase angle of each crank journal is found by the dial connected to one end of the crankshaft and the vernier caliper fixed on the workbench. This measurement method is simple, but it has disadvantages such as the dispersed components of the measuring equipment, high manufacturing precision requirements, and difficulty in adjustment during assembly and use. Utility Model Content

[0004] In view of the shortcomings of the prior art, the present invention provides a crankshaft crank phase angle detection device, which reduces measurement data and error accumulation, improves detection convenience, and meets the needs of high-precision crankshaft detection.

[0005] The technical solution adopted by this utility model to solve its technical problem is: The crankshaft crank phase angle detection device includes a flat seat and an adjustable support seat that are spaced apart and fixedly arranged. A dial indicator assembly is provided at the top of the flat seat, and the bottom end of the dial indicator assembly abuts against the top of the flat seat. An adjustment mechanism is provided at the top of the adjustable support seat, and a crankshaft is provided at the top of the adjustment mechanism. The crankshaft includes a number of crank necks that are spaced apart and fixedly arranged. A connecting plate is fixedly arranged at the end of the crankshaft near the dial indicator assembly. A transfer plate is fixedly arranged in the middle of the connecting plate on the side away from the crankshaft. A stepped mandrel is fixedly arranged through the middle of the transfer plate. A scale and a vernier scale are sequentially fitted on the outer surface of the stepped mandrel on the side away from the connecting plate. The scale and the stepped mandrel are fixedly connected. The vernier scale and the stepped mandrel are rotatably connected. The vernier scale is rotatably arranged on the side of the scale away from the transfer plate, and the vernier scale and the dial indicator assembly are rotatably connected.

[0006] Furthermore, the adjustment mechanism includes a fixed seat fixedly installed at the top of the adjustable support base, a V-shaped frame fixedly installed at the top of the fixed seat, and fixed rods fixedly installed at the top of both sides of the V-shaped frame. Adjusting rods are slidably sleeved on the outer surface of the fixed rods. Arc-shaped plates are fixedly installed on the opposite sides of the top of the two sets of adjusting rods in conjunction with the crank neck. The arc-shaped plates abut against the bottom of the crank neck.

[0007] Furthermore, the lower outer surface of the adjusting rod is provided with several sets of through holes 1 at intervals and through, and the upper part of the fixing rod is provided with several sets of through holes 1 through holes 2. The corresponding through holes 1 and through holes 2 are engaged with limit rods.

[0008] Furthermore, a pressure pad is fixedly installed on the side of the vernier scale away from the scale plate.

[0009] Furthermore, a hanging plate is fixedly installed on the top of the connecting plate on the side away from the crankshaft.

[0010] Furthermore, the outer surface of the adapter plate is provided with several grooves evenly spaced along the circumference, and several groove washers are fixedly installed on the side of the connecting plate near the adapter plate in conjunction with the grooves.

[0011] Furthermore, a large crankshaft flange is fixedly installed at one end of the crankshaft near the dial indicator assembly, and the connecting plate and several grooved gaskets are fixedly connected to the large crankshaft flange by several bolts.

[0012] Furthermore, a vernier scale is fixedly installed at intervals on the side of the adjustable support away from the flat seat.

[0013] Furthermore, a connecting rod is slidably mounted on the top of the vernier scale 2, and a dial indicator assembly 2 is fixedly mounted on the end of the connecting rod 1 away from the vernier scale 2. The bottom end of the dial indicator assembly 2 abuts against the top end of the crank neck.

[0014] Furthermore, a connecting rod 2 is rotatably provided on the side of the vernier scale away from the scale plate, and a connecting rod 3 is rotatably connected to the end of the connecting rod 2 away from the vernier scale, and a dial indicator assembly 1 is rotatably connected to the end of the connecting rod 3 away from the connecting rod 2.

[0015] The beneficial effects of this utility model are: This invention, through the coordinated arrangement of dial indicator component one, adjustment mechanism, scale plate and vernier scale one, fundamentally avoids the accumulation of errors caused by multi-step measurement and calculation, ensuring the accuracy of phase angle detection; by setting up scale plate and vernier scale one, this invention can directly read the phase angle of each crank neck, simplifying the detection process, reducing detection difficulty and improving detection efficiency. Attached Figure Description

[0016] Figure 1 This is a front view structural diagram of the present utility model; Figure 2 This is a side view of the structure of this utility model; Figure 3 This is a schematic diagram of the adjustable support base and adjustment mechanism of this utility model; Figure 4 for Figure 1 Enlarged structural diagram at point A; Figure 5 for Figure 1 Enlarged structural diagram at point B; Figure 6 for Figure 2 A magnified structural diagram at point C.

[0017] In the diagram: 1. Flat seat; 2. Adjustable support seat; 3. Dial indicator assembly one; 4. Adjustment mechanism; 41. Fixed seat; 42. V-block; 43. Adjusting rod; 44. Through hole one; 45. Limiting rod; 5. Crankshaft; 51. Crank neck; 6. Connecting plate; 7. Adapter plate; 8. Stepped mandrel; 9. Indexing plate; 10. Vernier scale one; 11. Pressure pad; 12. Hanging plate; 13. Groove washer; 14. Vernier scale two; 15. Dial indicator assembly two; 16. Crankshaft large flange. Detailed Implementation

[0018] The present invention will now be described and explained in detail with reference to the accompanying drawings.

[0019] Example 1 like Figure 1-5 As shown, the crankshaft crank phase angle detection device includes a flat seat 1 and an adjustable support seat 2 that are spaced apart and fixedly arranged. A dial indicator assembly 3 is provided at the top of the flat seat 1, and the bottom end of the dial indicator assembly 3 abuts against the top of the flat seat 1. An adjustment mechanism 4 is provided at the top of the adjustable support seat 2, and a crankshaft 5 is provided at the top of the adjustment mechanism 4. The crankshaft 5 includes a plurality of crank necks 51 that are spaced apart and fixedly arranged. A connecting plate 6 is fixedly arranged at the end of the crankshaft 5 near the dial indicator assembly 3. A transition plate 7 is fixedly installed in the middle of the connecting plate 6 on the side away from the crankshaft 5. A stepped mandrel 8 is fixedly installed through the middle of the transition plate 7. A dividing plate 9 and a vernier scale 10 are sequentially fitted on the outer surface of the stepped mandrel 8 on the side away from the connecting plate 6. The dividing plate 9 and the stepped mandrel 8 are fixedly connected. The vernier scale 10 and the stepped mandrel 8 are rotatably connected. The vernier scale 10 is rotatably installed on the side of the dividing plate 9 away from the transition plate 7. The vernier scale 10 and the dial indicator assembly 3 are rotatably connected.

[0020] With the above configuration, the two sides of the connecting plate 6 are respectively provided with two different sizes of inner stops, which can be connected to the outer stops of two different models of crankshaft 5 flanges respectively; the two sides of the adapter plate 7 are respectively provided with two different sizes of bosses that cooperate with the inner stops on both sides of the connecting plate 6, which can be flipped to cooperate with the inner stops on both sides of the connecting plate 6; the indexing plate 9 and the vernier scale 10 are connected to the adapter plate 7 through the stepped mandrel 8; the surface of the indexing plate 9 has 360 divisions, each division representing 1°, and the surface of the vernier scale 10 has 120 divisions, each division representing 58′, and the two together can achieve a detection accuracy of 2′; the dial indicator assembly 3 and the flat seat 1 are used together to precisely control the rotation angle of the vernier scale 10.

[0021] The adjustment mechanism 4 includes a fixed seat 41 fixedly installed at the top of the adjustable support 2. A V-shaped frame 42 is fixedly installed at the top of the fixed seat 41. Fixed rods are fixedly installed at the top of both sides of the V-shaped frame 42. Adjustment rods 43 are slidably sleeved on the outer surface of the fixed rods. Arc plates are fixedly installed on the opposite sides of the top of the two sets of adjustment rods 43 in conjunction with the crank neck 51. The arc plates abut against the bottom of the crank neck 51.

[0022] The lower outer surface of the adjusting rod 43 is provided with several sets of through holes 44 at intervals and through. The upper part of the fixing rod is provided with several sets of through holes 44 and several through holes 2 through. The corresponding through holes 44 and through holes 2 are engaged with limit rods 45.

[0023] With the above settings, the adjustable support 2 can adjust its own height, and the adjusting rod 43 can move longitudinally along the fixed rod. Through the combined action of the two, the height of the arc plate can be adjusted more precisely, so that the bottom of the arc plate and the crank neck 51 abuts against each other. The several sets of through holes 44 are at different heights, and the height of the adjusting rod 43 can be adjusted by inserting the limiting rod 45 into different through holes 44 and through holes 2, thereby adjusting the height of the arc plate.

[0024] A pressure pad 11 is fixedly installed on the side of the vernier scale 10 away from the index plate 9.

[0025] With the above settings, the pressure pad 11 can press the vernier scale 10 tightly with bolts to prevent relative displacement between the vernier scale 10 and the scale line of the scale 9 during the measurement process.

[0026] A hanging plate 12 is fixedly installed on the top of the connecting plate 6 on the side away from the crankshaft 5.

[0027] The outer surface of the adapter plate 7 is provided with a number of grooves evenly spaced along the circumference. The side of the connecting plate 6 near the adapter plate 7 is provided with a number of groove washers 13 to fit the grooves.

[0028] A crankshaft large flange 16 is fixedly installed at one end of the crankshaft 5 near the dial indicator assembly 3. The connecting plate 6 and several grooved washers 13 are all fixedly connected to the crankshaft large flange 16 by several bolts.

[0029] With the above setup, several bolts pass through the connecting plate 6 and several grooved washers 13, fixing the connecting plate 6, several grooved washers 13 and crankshaft large flange 16 together.

[0030] The adjustable support 2 is fixedly equipped with a vernier scale 14 at a distance from the side of the flat seat 1.

[0031] A connecting rod is slidably mounted on the top of the vernier scale 2 14. A dial indicator assembly 2 15 is fixedly mounted on the end of the connecting rod 1 away from the vernier scale 2 14. The bottom end of the dial indicator assembly 2 15 abuts against the top end of the crank neck 51.

[0032] With the above settings, the height of the crankshaft 5 and crank neck 51 can be finely adjusted by setting the vernier scale 214 and the dial indicator assembly 215.

[0033] A connecting rod 2 is rotatably mounted on the side of the vernier scale 10 away from the scale 9. A connecting rod 3 is rotatably connected to the end of the connecting rod 2 away from the vernier scale 10. A dial indicator assembly 3 is rotatably connected to the end of the connecting rod 3 away from the connecting rod 2.

[0034] Working principle and process: Test preparation: Place crankshaft 5 stably on the three rotatable support frames of the test platform. Finely adjust the height of the three rotatable support frames using vernier caliper 214 to ensure that the center lines of each main journal are coaxial and parallel to the test reference plane, thus ensuring the accuracy of the test.

[0035] Device installation and initial positioning: Use several bolts and grooved washers 13 to fix the connecting plate 6 to the side of the crankshaft flange 16 away from the crankshaft 5. During operation, ensure that the tightening force of the bolts is uniform to avoid loosening of the device. Then slowly rotate the crankshaft 5 and use the vernier scale 14 to precisely position one set of crank necks 51 at the top dead center. At this time, the arc plate abuts against the bottom end of the crank necks 51 to ensure that the rotation of the crankshaft 5 can be effectively restricted.

[0036] Vernier scale and reference angle setting: Rotate vernier scale 10 to make its zero mark coincide with the zero mark of the scale 9; then press vernier scale 10 tightly with pressure pad 11 to prevent relative displacement between vernier scale 10 and scale 9 during measurement; then adjust dial indicator assembly 3 so that the dial indicator head of dial indicator assembly 3 is in close contact with the top of the flat seat 1, and give the dial indicator head a certain preload; after completing the above operations, set the crank neck 51 as the 0° reference angle for crankshaft phase detection.

[0037] Crank neck phase angle measurement: Adjust the adjustable support 2, slowly rotate the crankshaft 5, and use the vernier scale 14 to accurately find and determine the highest point of the other crank neck 51; after finding the highest point, adjust the adjustable support 2 so that the arc plate touches the bottom of the crank neck 51 to ensure that the rotation of the crank neck 51 is restricted; then loosen the pressure pad 11 and rotate the vernier scale 10 so that the pressure of the dial indicator assembly 3 reaches the preload value given when the 0° reference angle is set; at this time, the relative rotation angle between the vernier scale 10 and the dial 9 is the phase angle of the crank neck 51 relative to the 0° reference angle.

[0038] Comprehensive inspection: Following the above steps, inspect the other crank necks 51 in sequence and record the phase angle of each crank neck 51 relative to the 0° reference angle; through data processing and analysis, comprehensively determine the phase angle distribution of several crank necks 51 of the entire crankshaft 5, and complete the accurate inspection of the crankshaft crank phase angle.

Claims

1. A crankshaft crank phase angle detection device, comprising a flat seat (1) and an adjustable support seat (2) arranged at intervals and fixedly, characterized in that, A dial indicator assembly (3) is provided at the top of the flat seat (1). The bottom end of the dial indicator assembly (3) abuts against the top of the flat seat (1). An adjustment mechanism (4) is provided at the top of the adjustable support (2). A crankshaft (5) is provided at the top of the adjustment mechanism (4). The crankshaft (5) includes several crank necks (51) that are spaced apart and fixedly arranged. A connecting plate (6) is fixedly provided at the end of the crankshaft (5) near the dial indicator assembly (3). A transition plate is fixedly provided in the middle of the side of the connecting plate (6) away from the crankshaft (5). A stepped mandrel (8) is fixedly installed through the middle of the plate (7) and the transition plate (7). The outer surface of the stepped mandrel (8) away from the connecting plate (6) is fitted with an indexing plate (9) and a vernier scale (10) in sequence. The indexing plate (9) and the stepped mandrel (8) are fixedly connected. The vernier scale (10) and the stepped mandrel (8) are rotatably connected. The vernier scale (10) is rotatably installed on the side of the indexing plate (9) away from the transition plate (7). The vernier scale (10) and the dial indicator assembly (3) are rotatably connected.

2. The crankshaft and crank phase angle detection device according to claim 1, characterized in that, The adjustment mechanism (4) includes a fixed seat (41) fixedly installed at the top of the adjustable support seat (2). A V-shaped frame (42) is fixedly installed at the top of the fixed seat (41). Fixed rods are fixedly installed at the top of both sides of the V-shaped frame (42). Adjustment rods (43) are slidably sleeved on the outer surface of the fixed rods. Arc plates are fixedly installed on the opposite sides of the top of the two sets of adjustment rods (43) in conjunction with the crank neck (51). The arc plates and the bottom of the crank neck (51) abut against each other.

3. The crankshaft and crank phase angle detection device according to claim 2, characterized in that, The lower outer surface of the adjusting rod (43) is provided with several sets of through holes (44) spaced apart and through. The upper part of the fixing rod is provided with several sets of through holes (44) through several through holes (2). The corresponding through holes (44) and through holes (2) are fitted with limit rods (45).

4. The crankshaft and crank phase angle detection device according to claim 1, characterized in that, A pressure pad (11) is fixedly installed on the side of the vernier scale (10) away from the scale plate (9).

5. The crankshaft and crank phase angle detection device according to claim 1, characterized in that, A hanging plate (12) is fixedly installed on the top of the connecting plate (6) on the side away from the crankshaft (5).

6. The crankshaft and crank phase angle detection device according to claim 1, characterized in that, The outer surface of the adapter plate (7) is provided with a number of grooves evenly spaced along the circumference. The side of the connecting plate (6) near the adapter plate (7) is provided with a number of groove washers (13) in conjunction with the grooves.

7. The crankshaft and crank phase angle detection device according to claim 6, characterized in that, A crankshaft large flange (16) is fixedly installed at one end of the crankshaft (5) near the dial indicator assembly (3). The connecting plate (6) and several grooved washers (13) are fixedly connected to the crankshaft large flange (16) by several bolts.

8. The crankshaft and crank phase angle detection device according to claim 1, characterized in that, The adjustable support (2) is spaced apart from the flat seat (1) and fixedly equipped with a vernier scale (14).

9. The crankshaft and crank phase angle detection device according to claim 8, characterized in that, A connecting rod is slidably mounted on the top of the vernier scale 2 (14). A dial indicator assembly 2 (15) is fixedly mounted on the end of the connecting rod away from the vernier scale 2 (14). The bottom end of the dial indicator assembly 2 (15) abuts against the top end of the crank neck (51).

10. The crankshaft and crank phase angle detection device according to claim 1, characterized in that, A connecting rod 2 is rotatably provided on the side of the vernier scale 1 (10) away from the scale plate (9). A connecting rod 3 is rotatably connected to the end of the connecting rod 2 away from the vernier scale 1 (10). A dial indicator assembly 1 (3) is rotatably connected to the end of the connecting rod 3 away from the connecting rod 2.

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