Special detection tool for crankshaft blank

Abstract

The utility model discloses a special detection tool for a crankshaft blank, which comprises a U-shaped first mounting plate, at least three pulleys, a major arc-shaped sliding ring sheet capable of driving the plurality of pulleys to gather or disperse during rotation, and a driving push rod of which the output end is connected with the sliding ring sheet through a detection unit, the detection unit comprises a connecting block hinged to the sliding ring piece, a plurality of connecting bolts, a sliding block slidably assembled on the connecting bolts and fixedly connected with the output end of the driving push rod, and a mounting block arranged on the connecting bolts in a sleeving mode. The detection tool not only can detect the size and the roundness of the main journal, but also can detect the size and the roundness of the conveying rod journal, and is high in practicability, high in detection accuracy and high in detection accuracy. And after the plurality of pulleys abut against the main shaft neck or the rod conveying shaft neck, the diameter can be obtained, and the roundness can be obtained by rotating the pulleys for one circle, so that the detection efficiency is high.

Description

Technical Field

[0001] The utility model relates to the technical field related to crankshaft blank detection, and in particular to a special inspection tool for crankshaft blanks. Background Art

[0002] The crankshaft is the most critical component in the engine. It receives force from the connecting rod, converts it into torque, and drives the engine's accessories. The crankshaft is subject to the combined effects of centrifugal force from the rotating mass, cyclically changing gas inertia, and reciprocating inertia, subjecting it to bending and torsional loads. Therefore, the crankshaft must possess sufficient strength and rigidity, and its journal surface must be wear-resistant, operate evenly, and be well-balanced.

[0003] The Chinese patent document CN202420391800.X, "A Special Inspection Tool for Crankshaft Blanks," discloses a special inspection tool for crankshaft blanks. Through the cooperation of adjustment slots, threaded rods, handles, springs, sliders and other structures, the height and angle of a fixed crankshaft can be adjusted, allowing inspectors to easily adjust the height and angle of a fixed crankshaft. In addition, they only need to rotate the crankshaft upwards without holding the crankshaft with their hands, and the crankshaft will not rotate. This allows inspectors to perform inspections with both hands, thereby improving inspection efficiency.

[0004] The above-mentioned device is to fix and clamp the two ends of the crankshaft so that the inspector can use a handheld outside diameter micrometer for inspection. In the existing technology, the outside diameter micrometer is used to inspect the main journal or the transport rod journal of the crankshaft in turn. The multi-point measurement method is used, and at least four points of the main journal or the transport rod journal need to be inspected. The inspection efficiency is low, so it is necessary to design a special inspection tool for the crankshaft blank. Utility Model Content

[0005] In view of the above technical problems, the purpose of the present invention is to overcome the problem of low detection efficiency using outside micrometers in the prior art.

[0006] To achieve the above-mentioned object, the utility model provides a special inspection tool for crankshaft blanks, comprising: a U-shaped first mounting plate, at least three pulleys uniformly distributed along the axis of the arc-shaped portion of the first mounting plate and slidably mounted on the first mounting plate, a superior arc-shaped sliding ring arranged coaxially with the arc-shaped portion of the first mounting plate and capable of driving the plurality of pulleys to gather or disperse when rotating, and a driving push rod hinged to the first mounting plate, the output end of which is connected to the sliding ring through a detection unit;

[0007] The detection unit includes a connecting block hinged to the sliding ring, a plurality of connecting bolts mounted on the connecting block and with axes parallel to the first mounting plate, a slider slidably mounted on the connecting bolt and fixedly connected to the output end of the driving push rod, a mounting block sleeved on the connecting bolt and located on the side of the slider away from the connecting block, a pressure sensor mounted on the connecting block, and at least one elastic member whose two ends respectively contact the ends of the slider and the pressure sensor.

[0008] Preferably, it also includes a U-shaped second mounting plate arranged parallel to the first mounting plate, and a mounting portion fixedly connected to the outer edge of the first mounting plate is protruded from the outer edge of the second mounting plate, and the pulley, sliding ring, detection unit and driving push rod are all located between the first mounting plate and the second mounting plate.

[0009] Preferably, the pulley is connected to a sliding arm whose length direction is consistent with the radial direction corresponding to the sliding ring and is slidingly connected to the first mounting plate along its own length direction. The sliding arm is fixedly connected to a guide plate parallel to the sliding ring. The guide plate is recessed with an arc-shaped groove that is arranged off-axis with the sliding ring. The sliding ring is protruded with a cylindrical guide portion that slides into the arc-shaped groove.

[0010] Preferably, a coaxial guide flange protrudes from the inner edge or the outer edge of the sliding ring, and at least one arc-shaped sliding seat slidably connected to the guide flange is fixedly connected to the first mounting plate.

[0011] Preferably, the elastic member is a spring sleeved on the connecting bolt, and a force transmission gasket is slidably sleeved on the connecting bolt, and two sides of the force transmission gasket respectively conflict with the end of the spring and the detection end of the pressure sensor.

[0012] Preferably, a strip-shaped slide seat slidably connected to the slide arm is mounted on the first mounting plate, and the slide arm is recessed with at least one guide groove having the same length direction as the strip-shaped slide seat.

[0013] According to the above technical solution, the utility model provides a special inspection tool for crankshaft blanks, which has the following beneficial effects when used: the inspection tool can not only detect the size and roundness of the main journal, but also detect the size and roundness of the transport rod journal, and is highly practical. After several pulleys come into contact with the main journal or the transport rod journal, the diameter can be obtained, and after one rotation, the roundness can be obtained, and the inspection efficiency is high.

[0014] Other features and advantages of the present invention will be described in detail in the subsequent specific implementation methods; and the parts not involved in the present invention are the same as the existing technology or can be implemented by using the existing technology. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] The accompanying drawings are used to provide a further understanding of the present invention and constitute a part of the specification. Together with the following specific embodiments, they are used to explain the present invention but do not constitute a limitation of the present invention. In the accompanying drawings:

[0016] Figure 1 This is a three-dimensional structural diagram of a special inspection tool for crankshaft blanks provided by the present invention;

[0017] Figure 2 This is a special inspection tool for crankshaft blanks provided by this utility model. Figure 1 Schematic diagram from the perspective of center along A;

[0018] Figure 3 This is a schematic diagram of the partial three-dimensional structure of a special inspection tool for crankshaft blanks provided by this utility model. Figure 1 ;

[0019] Figure 4 This is a schematic diagram of the partial three-dimensional structure of a special inspection tool for crankshaft blanks provided by this utility model. Figure 2 ;

[0020] Figure 5 This is a schematic diagram of the partial three-dimensional structure of a special inspection tool for crankshaft blanks provided by this utility model. Figure 3 .

[0021] Description of Reference Numerals

[0022] 1. First mounting plate; 2. Pulley; 3. Sliding ring; 4. Driving push rod; 5. Connecting block; 6. Connecting bolt; 7. Sliding block; 8. Mounting block; 9. Pressure sensor; 10. Elastic member; 11. Second mounting plate; 12. Mounting portion; 13. Sliding arm; 14. Guide plate; 15. Arc groove; 16. Guide flange; 17. Arc slide; 18. Force transmission gasket; 19. Strip slide. DETAILED DESCRIPTION

[0023] The following is a detailed description of the specific embodiments of the present invention in conjunction with the accompanying drawings. It should be understood that the specific embodiments described herein are only used to illustrate and explain the present invention and are not intended to limit the present invention.

[0024] In the present invention, unless otherwise stated, directional words such as "upper, lower, inside, outside" contained in a term merely represent the orientation of the term in normal usage, or are common names understood by those skilled in the art, and should not be regarded as limitations on the term.

[0025] like Figure 1-5As shown, a special inspection fixture for crankshaft blanks is characterized by comprising: a U-shaped first mounting plate 1, at least three pulleys 2 evenly distributed along the axis of the arc-shaped portion of the first mounting plate 1 and slidably mounted on the first mounting plate 1, a superior arc-shaped sliding ring 3 coaxially arranged with the arc-shaped portion of the first mounting plate 1 and capable of driving the plurality of pulleys 2 to gather or disperse when rotating; and a driving push rod 4 hinged to the first mounting plate 1, the output end of which is connected to the sliding ring 3 through a detection unit;

[0026] The detection unit includes a connecting block 5 hinged to the sliding ring 3, several connecting bolts 6 assembled on the connecting block 5 and with the axis parallel to the first mounting plate 1, a slider 7 slidably assembled on the connecting bolt 6 and fixedly connected to the output end of the driving push rod 4, a mounting block 8 sleeved on the connecting bolt 6 and located on the side of the slider 7 away from the connecting block 5, a pressure sensor 9 assembled on the connecting block 5 and at least one elastic member 10 whose two ends respectively contact the ends of the slider 7 and the pressure sensor 9.

[0027] The arc-shaped portion of the U-shaped first mounting plate 1 is sleeved on the main journal or the transport rod journal of the crankshaft, and the driving push rod 4 pushes the sliding ring 3 to rotate through the detection unit. The driving push rod 4 will push the slider 7 to slide on the connecting bolt 6, and the elastic member 10 will be further compressed. The mounting block 8 will resist the end of the connecting bolt 6 away from the connecting block 5. After the elastic member 10 is compressed, the pressure value detected by the pressure sensor 9 increases, and the elastic member 10 will push the mounting block 8 to move away from the slider 7, which will drive the connecting block 5 to move through the connecting bolt 6, thereby driving the sliding ring 3 to slide. The rotation of the sliding ring 3 will drive several pulleys 2 to gather and resist on the main journal or the transport rod journal. The detection value of the pressure sensor 9 The moving distance of the output end of the driving push rod 4 can be used to obtain the rotation angle of the sliding ring 3, thereby obtaining the moving distance of the pulley 2, and when the pulley 2 contacts the main shaft neck or the transport rod shaft neck, the diameter of the main shaft neck or the transport rod shaft neck can be obtained; then rotate the inspection fixture around the main shaft neck or the transport rod shaft neck, the pulley 2 will slide on the outer wall of the main shaft neck or the transport rod shaft neck. If the roundness of the main shaft neck or the transport rod shaft neck is not 0, the pulley 2 will be pushed to move closer to the sliding ring 3. Because the output end of the driving push rod 4 has not moved at this time, the distance between the mounting block 8 and the slider 7 will be reduced, and the pressure value measured by the pressure sensor 9 will increase. The roundness can be obtained through the fluctuation range of the measured pressure value.

[0028] This inspection tool can not only detect the size and roundness of the main shaft neck, but also the size and roundness of the transport rod shaft neck. It is highly practical. After several pulleys come into contact with the main shaft neck or the transport rod shaft neck, the diameter can be obtained. After one rotation, the roundness can be obtained, and the inspection efficiency is high.

[0029] When the pulley 2 is reset, the notch of the arc-shaped sliding ring 3 corresponds to the notch of the first mounting plate 1 , so that the main journal or the transport rod journal can enter the arc-shaped portion of the first mounting plate 1 .

[0030] It can be powered by a wired connection or a battery. The driving push rod adopts an electric push rod, which is connected to the control terminal wirelessly or wired to transmit data. The data transmission module is an existing mature technology.

[0031] It also includes a U-shaped second mounting plate 11 arranged parallel to the first mounting plate 1, and a mounting portion 12 fixedly connected to the outer edge of the first mounting plate 1 is protruded on the outer edge of the second mounting plate 11, and the pulley 2, sliding ring 3, detection unit and driving push rod 4 are all located between the first mounting plate 1 and the second mounting plate 11.

[0032] The second mounting plate 11 and the first mounting plate 1 form a housing.

[0033] The pulley 2 is connected to a sliding arm 13 whose length direction is consistent with the radial direction corresponding to the sliding ring piece 3 and is slidingly connected to the first mounting plate 1 along its own length direction. The sliding arm 13 is fixedly connected to a guide plate 14 parallel to the sliding ring piece 3. The guide plate 14 is recessed with an arc-shaped groove 15 that is arranged off-axis with the sliding ring piece 3. The sliding ring piece 3 is protruded with a cylindrical guide portion that slides into the arc-shaped groove 15.

[0034] When the sliding ring 3 rotates, the cylindrical guide portion slides in the arc-shaped groove 15 , which drives the sliding arm 13 to slide, thereby driving the pulley 2 to move closer to or away from the axis of the sliding ring 3 .

[0035] A coaxial guide flange 16 is protruded from the inner edge or the outer edge of the sliding ring 3 , and at least one arc-shaped sliding seat 17 slidably connected to the guide flange 16 is fixedly connected to the first mounting plate 1 .

[0036] The elastic member 10 is a spring sleeved on the connecting bolt 6 , and a force transmission gasket 18 is slidably sleeved on the connecting bolt 6 . Both sides of the force transmission gasket 18 respectively contact the end of the spring and the detection end of the pressure sensor 9 .

[0037] The first mounting plate 1 is provided with a strip-shaped slide 19 slidably connected to the slide arm 13 . The slide arm 13 is provided with at least one guide groove having the same length as the strip-shaped slide 19 .

[0038] The preferred embodiments of the present invention are described in detail above in conjunction with the accompanying drawings. However, the present invention is not limited to the specific details of the above embodiments. Within the technical concept of the present invention, various simple modifications can be made to the technical solution of the present invention, and these simple modifications all fall within the scope of protection of the present invention.

[0039] It should also be noted that the various specific technical features described in the above specific embodiments can be combined in any appropriate manner without contradiction. In order to avoid unnecessary repetition, the present utility model will no longer separately describe various possible combinations.

[0040] In addition, the various embodiments of the present invention may be arbitrarily combined, and as long as they do not violate the concept of the present invention, they should also be regarded as the contents disclosed by the present invention.

Claims

1. A special inspection tool for crankshaft blanks, characterized in that: include: A U-shaped first mounting plate (1), at least three pulleys (2) uniformly distributed along the axis of the arc-shaped portion of the first mounting plate (1) and all slidably mounted on the first mounting plate (1), an arc-shaped sliding ring (3) coaxially arranged with the arc-shaped portion of the first mounting plate (1) and capable of driving the plurality of pulleys (2) to gather or disperse when rotating, and a driving push rod (4) hinged to the first mounting plate (1) and having an output end connected to the sliding ring (3) via a detection unit; The detection unit comprises a connecting block (5) hinged to a sliding ring (3), a plurality of connecting bolts (6) mounted on the connecting block (5) and having axes parallel to the first mounting plate (1), a slider (7) slidably mounted on the connecting bolt (6) and fixedly connected to the output end of the driving push rod (4), a mounting block (8) sleeved on the connecting bolt (6) and located on a side of the slider (7) away from the connecting block (5), a pressure sensor (9) mounted on the connecting block (5), and at least one elastic member (10) having two ends respectively in contact with the ends of the slider (7) and the pressure sensor (9).

2. A special inspection tool for crankshaft blank according to claim 1, characterized in that: The invention also comprises a U-shaped second mounting plate (11) arranged parallel to the first mounting plate (1); a mounting portion (12) protruding from the outer edge of the second mounting plate (11) and fixedly connected to the outer edge of the first mounting plate (1); and the pulley (2), the sliding ring (3), the detection unit and the driving push rod (4) are all located between the first mounting plate (1) and the second mounting plate (11).

3. A special inspection tool for crankshaft blank according to claim 1, characterized in that: The pulley (2) is connected to a sliding arm (13) whose length direction is consistent with the radial direction corresponding to the sliding ring (3) and is slidably connected to the first mounting plate (1) along its own length direction; the sliding arm (13) is fixedly connected to a guide plate (14) parallel to the sliding ring (3); the guide plate (14) is recessed with an arc-shaped groove (15) arranged eccentrically with the axis of the sliding ring (3); and the sliding ring (3) is protruding with a cylindrical guide portion slidably inserted into the arc-shaped groove (15).

4. A special inspection tool for crankshaft blank according to claim 1, characterized in that: A coaxial guide flange (16) protrudes from the inner edge or outer edge of the sliding ring (3), and at least one arc-shaped sliding seat (17) slidably connected to the guide flange (16) is fixedly connected to the first mounting plate (1).

5. The special inspection tool for crankshaft blank according to claim 1, characterized in that: The elastic member (10) is a spring sleeved on the connecting bolt (6), and a force transmission gasket (18) is slidably sleeved on the connecting bolt (6). Both sides of the force transmission gasket (18) respectively contact the end of the spring and the detection end of the pressure sensor (9).

6. A special inspection tool for crankshaft blank according to claim 3, characterized in that: The first mounting plate (1) is equipped with a strip-shaped slide seat (19) slidably connected to the slide arm (13), and the slide arm (13) is recessed with at least one guide groove in the same length direction and matching the strip-shaped slide seat (19).

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