Crankshaft machining quality detection equipment

Abstract

The application discloses a kind of crankshaft machining quality detection equipment, it is related to crankshaft detection equipment technical field.The detection table is set to rotate driving mechanism and the crankshaft to be detected above the detection table, the left side of rotating driving mechanism is set end fixed mechanism, the crankshaft to be detected is located left side of end fixed mechanism, the left side of the crankshaft to be detected is set coaxality detection mechanism;End fixed mechanism is set above auxiliary fixed mechanism, and the left side end of auxiliary fixed mechanism is connected with the crankshaft to be detected.Coaxality detection mechanism is moved with sliding rheostat opposite to electrically conductive sliding block, and the radial offset of crankshaft is converted into the change of resistance value by the cooperation of extension plate, abutment plate, contact plate and amplification mechanism, and offset is recorded and displayed in real time by voltage meter, and display screen is used to visually display test results, realize automatic detection and data record, improve detection efficiency and precision;The stability in the rotation process of the crankshaft to be detected is improved by the setting of auxiliary fixed mechanism.

Description

Technical Field

[0001] This invention belongs to the technical field of crankshaft testing equipment, and particularly relates to a crankshaft machining quality testing device. Background Technology

[0002] The crankshaft is a core component in mechanical equipment such as internal combustion engines and compressors. Its main function is to convert the linear motion of the piston into rotational motion, thereby transmitting power. Because the crankshaft bears complex alternating loads during operation, its machining quality directly affects the operating efficiency and service life of the equipment. Therefore, accurate quality inspection during crankshaft machining is particularly important. Among these aspects, coaxiality, as a crucial indicator of crankshaft geometric accuracy, directly relates to the crankshaft's rotational balance and the stability of power transmission, making it a critical and indispensable aspect of the inspection process.

[0003] Traditional crankshaft coaxiality testing typically uses a dial indicator. Inspectors judge crankshaft error by observing the deflection of the dial indicator pointer. However, this method has significant limitations: First, the dial indicator cannot automatically record measurement data, and relying on manual readings easily introduces errors. Second, the crankshaft needs to be manually rotated during testing, which is cumbersome and inefficient. Furthermore, while a V-bracket is usually used to support the crankshaft during testing, the contact points between the V-bracket and the crankshaft cannot be precisely aligned with the crankshaft's central axis. During rotation, the crankshaft will rotate around the axis formed by the contact points, rather than its actual central axis, leading to errors in the coaxiality measurement results.

[0004] Therefore, this application proposes a crankshaft machining quality inspection device to solve the above problems. Summary of the Invention

[0005] The purpose of this invention is to provide a crankshaft machining quality inspection device to address the existing problems, thereby solving at least one of the aforementioned technical problems.

[0006] The present invention is achieved through the following technical solution: a crankshaft machining quality inspection device, including an inspection table, a rotary drive mechanism and a crankshaft to be inspected are arranged above the inspection table, an end fixing mechanism is arranged on the left side of the rotary drive mechanism, the crankshaft to be inspected is located on the left side of the end fixing mechanism, a coaxiality inspection mechanism is arranged on the left side of the crankshaft to be inspected, and an auxiliary fixing mechanism is arranged above the end fixing mechanism, the left end of the auxiliary fixing mechanism being connected to the crankshaft to be inspected; The coaxiality detection mechanism includes a detection frame. A sliding rheostat and a metal rod are arranged on the inner side of the detection frame. The upper and lower ends of the metal rod pass through the detection frame and extend to the upper and lower sides of the detection frame, respectively. A conductive slider is slidably connected to the metal rod. Sliding plates are fixedly connected to the left and right sides of the front sidewall of the conductive slider. The adjacent sidewalls of the two sliding plates abut against the outer coil of the sliding rheostat. A receiving frame is fixedly connected to the right end of the detection frame. A moving slide is provided on the receiving frame. An extension plate is provided on the front side of the receiving frame. The rear end of the extension plate passes through the moving slide and extends to the rear side of the receiving frame. An amplification mechanism is provided between the extension plate and the conductive slider.

[0007] Preferably, the amplification mechanism includes an amplification gear, which is rotatably connected to the rear inner wall of the detection frame. A mating gear is fixedly connected to the front end of the amplification gear. The extension plate is L-shaped, and a synchronous toothed plate is fixedly connected to the left end of the extension plate. The synchronous toothed plate meshes with the mating gear. An amplification toothed plate is fixedly connected to the rear end of the conductive slider. The amplification gear and the amplification toothed plate mesh. The upper and lower ends of the amplification toothed plate penetrate the upper and lower side walls of the detection frame, respectively. The amplification toothed plate is made of non-metallic material.

[0008] Preferably, a limiting slide rod is fixedly connected to the lower inner wall of the movable slide rail. The upper end of the limiting slide rod passes through the extension plate and is fixedly connected to the upper inner wall of the movable slide rail. The limiting slide rod and the extension plate are slidably connected. An abutment spring is sleeved on the limiting slide rod. The upper end of the abutment spring is fixedly connected to the upper inner wall of the movable slide rail. The lower end of the abutment spring is fixedly connected to the upper end of the extension plate. An abutment plate is fixedly connected to the lower end of the extension plate. A contact plate is fixedly connected to the lower end of the abutment plate. The lower end face of the contact plate abuts against the outer wall of the left end shaft of the crankshaft to be tested.

[0009] Preferably, a display screen, a power supply, a voltmeter, a fixed resistor, and a movable frame are also provided above the testing platform. The movable frame is U-shaped and fixed to the upper end of the testing platform. A sliding frame is fitted on the upper side wall of the movable frame, and the lower end of the sliding frame abuts against the upper end of the testing platform. An adjusting vertical rod is fixedly connected to the upper end of the sliding frame, and an adjusting frame is fitted on the adjusting vertical rod. The front end of the adjusting frame is fixedly connected to the rear end of the outer frame of the testing platform. A second locking bolt is provided on the rear side of the adjusting frame, and the front end of the second locking bolt penetrates the rear side wall of the adjusting frame and abuts against the rear end of the adjusting vertical rod. A first locking bolt is provided on the rear side of the sliding frame, and the front end of the first locking bolt penetrates the rear side wall of the sliding frame and abuts against the rear side wall of the movable frame.

[0010] Preferably, the power supply, fixed resistor, and sliding rheostat of the device are connected in series, the voltmeter is connected in parallel with the sliding rheostat, and the display screen is used to record and display the voltmeter detection value.

[0011] Preferably, the end fixing mechanism includes a fixing frame, the left side wall of the fixing frame has a placement hole, and the inner side of the fixing frame is provided with two clamping plates, the clamping plates are V-shaped, and the two clamping plates are located on the upper and lower sides of the right end of the crankshaft to be tested.

[0012] Preferably, the rotary drive mechanism includes a drive motor, a rotating rod, and a mounting plate. The mounting plate and the drive motor are both fixed on the testing platform. The output end of the drive motor is fixedly connected to a drive gear. The left end of the rotating rod passes through the mounting plate and is fixedly connected to the right end of the fixed frame. The rotating rod is rotatably connected to the mounting plate. A driven gear is fixedly connected to the rotating rod. The drive gear and the driven gear mesh.

[0013] Preferably, movable plates are fixedly connected to both the front and rear ends of the two clamping plates. Two bidirectional lead screws are rotatably connected to the lower inner wall of the fixed frame. The upper ends of the bidirectional lead screws pass through the two movable plates in sequence and are rotatably connected to the upper inner wall of the fixed frame. The threads of the two movable plates and the bidirectional lead screws are opposite in direction. A rotating plate is provided on the front side of the fixed frame. An adjusting worm gear is fixedly connected to the rear end of the rotating plate. The rear end of the adjusting worm gear passes through the front side wall of the fixed frame and is rotatably connected to the rear inner wall of the fixed frame. Adjusting worm wheels are fixedly connected to the two bidirectional lead screws. The adjusting worm wheels and the adjusting worm gears are compatible.

[0014] Preferably, the auxiliary fixing mechanism includes an auxiliary frame and an adjusting clamping screw. The auxiliary frame is L-shaped, and an auxiliary plate is slidably connected within the transverse frame of the auxiliary frame. The left end of the auxiliary plate extends to the left side of the auxiliary frame. A locking bolt three is provided above the auxiliary frame, and the lower end of the locking bolt three passes through the auxiliary frame and abuts against the upper end of the auxiliary plate. A limit frame is provided below the auxiliary plate. The limit frame is U-shaped, and the upper end of the limit frame passes through the connecting journal on the crankshaft to be tested and passes through the auxiliary plate. Outer locking bolts are provided on both the front and rear sides of the auxiliary plate. The end of the outer locking bolt near the limit frame passes through the auxiliary plate and abuts against the side wall of the limit frame. Limiting slides are provided on the inner walls of both the front and rear sides of the limit frame. An upper clamping block is provided inside the limit frame, and the front and rear ends of the upper clamping block extend into the front and rear limiting slides respectively and are slidably connected to the limiting slides. The lower end of the adjusting clamping screw passes through the auxiliary plate and is rotatably connected to the upper end of the upper clamping block.

[0015] The present invention has the following advantages over the prior art: 1. This invention provides a crankshaft machining quality inspection device. This device converts the radial offset of the crankshaft into a change in resistance value through the cooperation of an extension plate, abutment plate, contact plate and amplification mechanism. The offset is recorded and displayed in real time using a voltmeter, and the test results are displayed on a screen, which improves the inspection efficiency and accuracy.

[0016] 2. This invention provides a crankshaft machining quality inspection device, which uses two V-shaped clamping plates to clamp and fix one end of the crankshaft to be inspected, ensuring that the crankshaft to be inspected can rotate around the axis of the fixed end when rotating. An auxiliary fixing mechanism is used to assist in fixing the connecting journal on the crankshaft to be inspected, thereby fixing the position of the crankshaft to be inspected as a whole, ensuring the stability of the crankshaft to be inspected during rotation, and preventing the end of the crankshaft to be inspected away from the end fixing mechanism from shifting under gravity.

[0017] 3. This invention provides a crankshaft machining quality inspection device. The device has an amplification mechanism in the coaxiality inspection mechanism, which mainly includes an amplification gear, a mating gear, a synchronous gear plate, and an amplification gear plate. Through the cooperation of each structure, the up and down movement of the extension plate is further amplified, thereby improving the sensitivity and accuracy of the inspection.

[0018] 4. This invention provides a crankshaft machining quality inspection device. The distance between the two clamping plates in the device can be adjusted by the cooperation of a two-way lead screw, a moving plate, an adjusting worm gear, and an adjusting worm. In the auxiliary fixing mechanism, the auxiliary frame and the auxiliary plate can be adjusted, so that the device can adapt to the inspection requirements of crankshafts of different sizes. The rotation drive mechanism can realize the rotation of the crankshaft to be inspected during the inspection process, realize automated inspection, reduce manual intervention, and improve inspection efficiency. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the overall structure of the present invention; Figure 2 This is a schematic diagram of the overall structure of the present invention from another angle; Figure 3 This is another schematic diagram of the overall structure of the present invention from another angle; Figure 4 This is a schematic diagram showing the positional relationship between the end fixing mechanism and the rotary drive mechanism of the present invention; Figure 5 This is a cross-sectional view of the fixed frame structure of the present invention; Figure 6 This is a schematic diagram of the auxiliary fixing mechanism of the present invention; Figure 7 This is a schematic diagram showing the positional relationship between the adjusting vertical rod and the coaxiality detection mechanism of the present invention. Figure 8This is a schematic diagram of the coaxiality detection mechanism of the present invention; Figure 9 This is a schematic diagram of the coaxiality detection mechanism of the present invention from another angle. Figure 10 This is another angular structural diagram of the coaxiality detection mechanism of the present invention; Figure 11 This is a schematic diagram illustrating the magnification mechanism in the coaxiality detection mechanism of the present invention.

[0020] In the diagram: 1. Testing table; 2. Rotary drive mechanism; 201. Drive motor; 202. Drive gear; 203. Rotating rod; 204. Driven gear; 205. Mounting plate; 3. End fixing mechanism; 301. Fixing frame; 302. Placement hole; 303. Clamping plate; 304. Moving plate; 305. Two-way lead screw; 306. Adjusting worm gear; 307. Adjusting worm; 308. Rotating plate; 4. Auxiliary fixing mechanism; 401. Auxiliary frame; 402. Auxiliary plate; 403. Locking bolt three; 404. Limiting frame; 405. Upper clamping block; 406. Outer locking bolt; 407. Adjusting clamping screw; 408. Limiting slide; 5. To be tested 6. Crankshaft; 7. Coaxiality detection mechanism; 8. Detection frame; 9. Sliding rheostat; 10. Metal rod; 11. Sliding plate; 12. Conductive slider; 13. Abutment frame; 14. Extension plate; 15. Limiting slide rod; 16. Abutment spring; 17. Abutment plate; 18. Moving slide; 19. Synchronizing gear plate; 20. Magnifying gear plate; 10. Matching gear; 11. Magnifying gear; 12. Contact plate; 13. Moving frame; 14. Sliding frame; 15. Locking bolt one; 16. Adjusting vertical rod; 17. Adjusting frame; 18. Locking bolt two; 19. Display screen; 10. Equipment power supply; 10. Voltmeter; 11. Fixed resistor. Detailed Implementation

[0021] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention. Example

[0022] Please see Figure 1 - Figure 6As shown, the present invention provides a technical solution: a crankshaft machining quality inspection device, including an inspection table 1, a rotary drive mechanism 2 and a crankshaft 5 to be inspected are arranged above the inspection table 1, an end fixing mechanism 3 is arranged on the left side of the rotary drive mechanism 2, the crankshaft 5 to be inspected is located on the left side of the end fixing mechanism 3, a coaxiality inspection mechanism 6 is arranged on the left side of the crankshaft 5 to be inspected, and an auxiliary fixing mechanism 4 is arranged above the end fixing mechanism 3, with the left end of the auxiliary fixing mechanism 4 connected to the crankshaft 5 to be inspected; Above the testing platform 1, there is also a display screen 13, a power supply 14, a voltmeter 15, a fixed resistor 16, and a movable frame 7. The movable frame 7 is U-shaped and fixed to the upper end of the testing platform 1. A sliding frame 8 is fitted on the upper side wall of the movable frame 7. The lower end of the sliding frame 8 abuts against the upper end of the testing platform 1. An adjusting vertical rod 10 is fixedly connected to the upper end of the sliding frame 8. An adjusting frame 11 is fitted on the adjusting vertical rod 10. The front end of the adjusting frame 11 is fixedly connected to the rear end of the outer frame 601. A second locking bolt 12 is provided on the rear side of the adjusting frame 11. The front end of the second locking bolt 12 passes through the rear side wall of the adjusting frame 11 and abuts against the rear end of the adjusting vertical rod 10. A first locking bolt 9 is provided on the rear side of the sliding frame 8. The front end of the first locking bolt 9 passes through the rear side wall of the sliding frame 8 and abuts against the rear side wall of the movable frame 7. The power supply 14, fixed resistor 16 and sliding rheostat 602 are connected in series, the voltmeter 15 is connected in parallel with the sliding rheostat 602, and the display screen 13 is used to record and display the voltmeter 15 detection value. The end fixing mechanism 3 includes a fixing frame 301. The left side wall of the fixing frame 301 is provided with a placement hole 302. Two clamping plates 303 are provided on the inner side of the fixing frame 301. The clamping plates 303 are V-shaped. The two clamping plates 303 are located on the upper and lower sides of the right side of the crankshaft 5 to be tested. The two clamping plates 303 are symmetrically distributed on the upper and lower sides of the rotating rod 203. The rotary drive mechanism 2 includes a drive motor 201, a rotating rod 203, and a mounting plate 205. The mounting plate 205 and the drive motor 201 are both fixed on the testing table 1. The output end of the drive motor 201 is fixedly connected to a drive gear 202. The left end of the rotating rod 203 passes through the mounting plate 205 and is fixedly connected to the right end of the fixing frame 301. The rotating rod 203 is rotatably connected to the mounting plate 205. A driven gear 204 is fixedly connected to the rotating rod 203. The drive gear 202 and the driven gear 204 mesh. The drive motor 201 drives the rotating rod 203 to rotate, which in turn drives the end fixing mechanism 3 to rotate, thereby driving the testing crankshaft 5 to rotate.

[0023] Movable plates 304 are fixedly connected to both ends of the two clamping plates 303. Two bidirectional screw rods 305 are rotatably connected to the lower inner wall of the fixed frame 301. The upper ends of the bidirectional screw rods 305 pass through the two movable plates 304 in sequence and are rotatably connected to the upper inner wall of the fixed frame 301. The threads of the two movable plates 304 and the bidirectional screw rods 305 are opposite in direction. A rotating plate 308 is provided on the front side of the fixed frame 301. An adjusting worm gear 307 is fixedly connected to the rear end of the rotating plate 308. The rear end of the adjusting worm gear 307 passes through the front wall of the fixed frame 301 and is rotatably connected to the rear inner wall of the fixed frame 301. An adjusting worm wheel 306 is fixedly connected to both bidirectional screw rods 305. The adjusting worm wheel 306 and the adjusting worm gear 307 are compatible. The auxiliary fixing mechanism 4 includes an auxiliary frame 401 and an adjusting clamping screw 407. The auxiliary frame 401 is L-shaped, and an auxiliary plate 402 is slidably connected within the transverse frame of the auxiliary frame 401. The left end of the auxiliary plate 402 extends to the left side of the auxiliary frame 401. A locking bolt 3 403 is provided above the auxiliary frame 401, and the lower end of the locking bolt 3 403 passes through the auxiliary frame 401 and abuts against the upper end of the auxiliary plate 402. A limit frame 404 is provided below the auxiliary plate 402. The limit frame 404 is U-shaped, and the upper end of the limit frame 404 passes under the connecting journal on the crankshaft 5 to be tested and passes through the auxiliary plate 402. Both the front and rear sides are provided with outer locking bolts 406. The end of the outer locking bolt 406 near the limit frame 404 passes through the auxiliary plate 402 and abuts against the side wall of the limit frame 404. Limit slides 408 are provided on the inner walls of both the front and rear sides of the limit frame 404. An upper pressing block 405 is provided inside the limit frame 404. The front and rear ends of the upper pressing block 405 extend into the front and rear limit slides 408 respectively and are slidably connected to the limit slides 408. The lower end of the adjusting pressing screw 407 passes through the auxiliary plate 402 and is rotatably connected to the upper end of the upper pressing block 405. The adjusting pressing screw 407 is threadedly connected to the auxiliary plate 402. Remove the outer locking bolt 406, pass the limiting frame 404 through the connecting journal on the side of the crankshaft 5 away from the end fixing mechanism 3, and through the auxiliary plate 402. At this time, the upper clamping block 405 cooperates with the limiting frame 404 through the limiting slide 408. After the lower inner wall of the limiting frame 404 contacts the outer wall of the connecting journal, tighten the outer locking bolt 406. Then rotate the adjusting clamping screw 407 to drive the upper clamping block 405 to move towards the connecting journal. The limiting frame 404 and the upper clamping block 405 cooperate to fix the auxiliary fixing mechanism 4 and the crankshaft 5 to be tested. When the crankshaft 5 to be tested is rotated by the rotary drive mechanism 2, the auxiliary fixing mechanism 4 and the end fixing mechanism 3 also rotate. Example

[0024] Please see Figure 7 - Figure 11As shown, based on Embodiment 1 and Embodiment 2, the present invention provides a technical solution: the coaxiality detection mechanism 6 includes a detection frame 601, a sliding rheostat 602 and a metal rod 603 are provided on the inner side of the detection frame 601, the upper and lower ends of the metal rod 603 respectively pass through the detection frame 601 and extend to the upper and lower sides of the detection frame 601, a conductive slider 605 is slidably connected on the metal rod 603, and sliders 604 are fixedly connected to the left and right sides of the front sidewall of the conductive slider 605, the adjacent sidewalls of the two sliders 604 abut against the outer coil of the sliding rheostat 602, a contact frame 606 is fixedly connected to the right side of the detection frame 601, a moving slide 611 is provided on the contact frame 606, an extension plate 607 is provided on the front side of the contact frame 606, the rear end of the extension plate 607 passes through the moving slide 611 and extends to the rear side of the contact frame 606, and an amplification mechanism is provided between the extension plate 607 and the conductive slider 605; Before testing, record the voltage of the sliding rheostat 602 in its initial state. Then, record the voltage value again by moving the extension plate 607. Set the moving distance of the extension plate 607 to be... The difference between the two voltage values ​​is And establish calibration curves Where k is a proportionality coefficient, the value of which was determined through multiple tests; in use, when a voltage change ∆U is detected, the result is then deduced in reverse. The coaxiality value is twice the maximum displacement deviation, therefore the coaxiality is calculated to be... .

[0025] The amplification mechanism includes an amplification gear 615, which is rotatably connected to the rear inner wall of the detection frame 601. A mating gear 614 is fixedly connected to the front end of the amplification gear 615. The extension plate 607 is L-shaped, and a synchronous toothed plate 612 is fixedly connected to the left end of the extension plate 607. The synchronous toothed plate 612 meshes with the mating gear 614. An amplification toothed plate 613 is fixedly connected to the rear end of the conductive slider 605. The amplification gear 615 and the amplification toothed plate 613 mesh. The upper and lower ends of the amplification toothed plate 613 penetrate the upper and lower side walls of the detection frame 601, respectively. The amplification toothed plate 613 is made of non-metallic material. When the crankshaft 5 under test rotates and there is a deviation at the left end, the contact plate 616 and the abutment plate 610 drive the extension plate 607 and the synchronous gear plate 612 to fluctuate in the up and down direction. Then, through the cooperation of the gear 614, the amplifying gear 615 and the amplifying gear plate 613, the fluctuation of the contact plate 616 is amplified and displayed by the movement of the slider 604 on the sliding rheostat 602. As the slider 604 on the sliding rheostat 602 moves, the resistance of the sliding rheostat 602 changes, causing the voltage at that position to change. The voltage change is displayed and recorded on the display screen 13, thereby realizing the detection of the coaxiality of the output ends on the left and right sides of the crankshaft 5 under test. A limiting slide rod 608 is fixedly connected to the lower inner wall of the movable slide 611. The upper end of the limiting slide rod 608 passes through the extension plate 607 and is fixedly connected to the upper inner wall of the movable slide 611. The limiting slide rod 608 and the extension plate 607 are slidably connected. A retaining spring 609 is sleeved on the limiting slide rod 608. The upper end of the retaining spring 609 is fixedly connected to the upper inner wall of the movable slide 611, and the lower end of the retaining spring 609 is fixedly connected to the upper end of the extension plate 607. The extension plate 607... A contact plate 610 is fixedly connected to the lower end of the crankshaft 5 to be tested. A contact plate 616 is fixedly connected to the lower end of the contact plate 610. The lower end face of the contact plate 616 abuts against the outer wall of the left end of the crankshaft 5 to be tested. In use, the position of the coaxiality detection mechanism 6 is adjusted to ensure that the contact spring 609 is always in a compressed state. This ensures that when the left end of the crankshaft 5 to be tested is offset during rotation, the contact plate 616 can always contact the outer wall of the left end of the crankshaft 5 to be tested, thereby ensuring the accuracy of the device's detection.

[0026] Working principle: In use, one end of the crankshaft 5 to be tested is placed between two V-shaped clamping plates 303 through the placement hole 302. By rotating the rotating plate 308, the adjusting worm 307 is rotated. The adjusting worm 307 and the adjusting worm wheel 306 work together to drive the two double-acting screws 305 to rotate, thereby causing the upper and lower moving plates 304 and clamping plates 303 to move closer to each other. As the two clamping plates 303 move closer to each other, the position of the end of the crankshaft 5 to be tested is fixed. At the same time, the outer locking bolt 406 is removed, and the limiting frame 404 is passed under the connecting journal on the side of the crankshaft 5 away from the end fixing mechanism 3 and through the auxiliary plate 402. At this time, the upper pressing block 405 cooperates with the limiting frame 404 through the limiting slide 408. When the lower inner wall of the limiting frame 404 contacts the outer wall of the connecting journal, the outer locking bolt is tightened. Bolt 406, then rotate the adjusting clamping screw 407 to drive the upper clamping block 405 to move towards the connecting journal. The limiting frame 404 and the upper clamping block 405 cooperate to fix the auxiliary fixing mechanism 4 and the crankshaft 5 to be tested. Move the sliding frame 8 in the left and right directions. When the contact plate 616 at the lower end of the extension plate 607 contacts the outer wall of the left end of the crankshaft 5 to be tested, stop and lock the locking bolt 9. Slide the coaxiality detection mechanism 6 down along the adjusting vertical rod 10. As the detection outer frame 601 and the abutment frame 606 move down, the abutment spring 609 is in a compressed state. At this time, tighten the locking bolt 12. The compressed abutment spring 609 ensures that the contact plate 616 can always contact the outer wall of the left end of the crankshaft 5 to be tested during the rotation of the crankshaft 5 to be tested, thereby ensuring the accuracy of the device detection. When the crankshaft 5 under test rotates and there is a deviation at the left end, the extension plate 607 and the synchronous gear plate 612 are driven to fluctuate in the up and down direction by the contact plate 616 and the abutment plate 610. Then, the fluctuation is amplified by the movement of the slider 604 on the sliding rheostat 602 through the cooperation of the gear 614, the amplifying gear 615 and the amplifying gear plate 613. As the slider 604 on the sliding rheostat 602 moves, the resistance of the sliding rheostat 602 changes, which causes the voltage at that position to change. The voltage change is displayed and recorded on the display screen 13, thereby realizing the detection of the coaxiality of the output ends on the left and right sides of the crankshaft 5 under test.

[0027] It should be noted that, in this document, relational terms such as "first" and "second" are used merely to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, the phrase "comprising an element defined as..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0028] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A crankshaft machining quality inspection device, comprising an inspection table (1), characterized in that: A rotary drive mechanism (2) and a crankshaft (5) to be tested are provided above the testing platform (1). An end fixing mechanism (3) is provided on the left side of the rotary drive mechanism (2). The crankshaft (5) to be tested is located on the left side of the end fixing mechanism (3). A coaxiality testing mechanism (6) is provided on the left side of the crankshaft (5). An auxiliary fixing mechanism (4) is provided above the end fixing mechanism (3). The left end of the auxiliary fixing mechanism (4) is connected to the crankshaft (5) to be tested. The coaxiality detection mechanism (6) includes a detection frame (601). A sliding rheostat (602) and a metal rod (603) are disposed on the inner side of the detection frame (601). The upper and lower ends of the metal rod (603) pass through the detection frame (601) and extend to the upper and lower sides of the detection frame (601). A conductive slider (605) is slidably connected to the metal rod (603). Sliding plates (604) are fixedly connected to the left and right sides of the front sidewall of the conductive slider (605). Two sliding plates (604) are... 4) The adjacent sidewalls are all in contact with the outer coil of the sliding rheostat (602). The right side of the detection frame (601) is fixedly connected to the abutment frame (606). The abutment frame (606) is provided with a sliding slide (611). The front side of the abutment frame (606) is provided with an extension plate (607). The rear end of the extension plate (607) passes through the sliding slide (611) and extends to the rear side of the abutment frame (606). An amplification mechanism is provided between the extension plate (607) and the conductive slider (605). The amplification mechanism includes an amplification gear (615), which is rotatably connected to the rear inner wall of the detection frame (601). A mating gear (614) is fixedly connected to the front end of the amplification gear (615). The extension plate (607) is L-shaped. A synchronous toothed plate (612) is fixedly connected to the left end of the extension plate (607). The synchronous toothed plate (612) meshes with the mating gear (614). An amplification toothed plate (613) is fixedly connected to the rear end of the conductive slider (605). The amplification gear (615) and the amplification toothed plate (613) mesh. The upper and lower ends of the amplification toothed plate (613) penetrate the upper and lower side walls of the detection frame (601), respectively. The amplification toothed plate (613) is made of non-metallic material. The auxiliary fixing mechanism (4) includes an auxiliary frame (401) and an adjusting clamping screw (407). The auxiliary frame (401) is L-shaped. An auxiliary plate (402) is slidably connected to the auxiliary frame (401) in the transverse frame. The left end of the auxiliary plate (402) extends to the left side of the auxiliary frame (401). A locking bolt three (403) is provided above the auxiliary frame (401). The lower end of the locking bolt three (403) passes through the auxiliary frame (401) and abuts against the upper end of the auxiliary plate (402). A limiting frame (404) is provided below the auxiliary plate (402). The limiting frame (404) is U-shaped. The upper end of the limiting frame (404) passes through the connecting journal on the crankshaft (5) to be tested and passes through... An auxiliary plate (402) is provided, with outer locking bolts (406) on both the front and rear sides. The end of the outer locking bolt (406) near the limiting frame (404) passes through the auxiliary plate (402) and abuts against the side wall of the limiting frame (404). Limiting slides (408) are provided on the inner walls of both the front and rear sides of the limiting frame (404). An upper pressing block (405) is provided inside the limiting frame (404). The front and rear ends of the upper pressing block (405) extend into the front and rear limiting slides (408) respectively and are slidably connected to the limiting slides (408). The lower end of the adjusting pressing screw (407) passes through the auxiliary plate (402) and is rotatably connected to the upper end of the upper pressing block (405). Above the testing platform (1) are an operation display screen (13) and a voltmeter (15). The voltmeter (15) is connected in parallel with the sliding rheostat (602). The operation display screen (13) is used to record and display the test values ​​of the voltmeter (15).

2. The crankshaft machining quality inspection equipment according to claim 1, characterized in that: A limiting slide rod (608) is fixedly connected to the lower inner wall of the movable slide (611). The upper end of the limiting slide rod (608) passes through the extension plate (607) and is fixedly connected to the upper inner wall of the movable slide (611). The limiting slide rod (608) and the extension plate (607) are slidably connected. An abutment spring (609) is sleeved on the limiting slide rod (608). The upper end of the abutment spring (609) is fixedly connected to the upper inner wall of the movable slide (611). The lower end of the abutment spring (609) is fixedly connected to the upper end of the extension plate (607). An abutment plate (610) is fixedly connected to the lower end of the extension plate (607). A contact plate (616) is fixedly connected to the lower end of the abutment plate (610). The lower end face of the contact plate (616) abuts against the outer wall of the left end shaft of the crankshaft (5) to be tested.

3. The crankshaft machining quality inspection equipment according to claim 1, characterized in that: Above the testing platform (1) are also provided a power supply (14), a fixed resistor (16) and a movable frame (7). The movable frame (7) is U-shaped and is fixed to the upper end of the testing platform (1). A sliding frame (8) is fitted on the upper side wall of the movable frame (7). The lower end of the sliding frame (8) abuts against the upper end of the testing platform (1). An adjusting vertical rod (10) is fixedly connected to the upper end of the sliding frame (8). An adjusting frame (11) is fitted on the adjusting vertical rod (10). The front end of the adjustment frame (11) is fixedly connected to the rear end of the detection outer frame (601). A second locking bolt (12) is provided on the rear side of the adjustment frame (11). The front end of the second locking bolt (12) passes through the rear side wall of the adjustment frame (11) and abuts against the rear end of the adjustment vertical rod (10). A first locking bolt (9) is provided on the rear side of the sliding frame (8). The front end of the first locking bolt (9) passes through the rear side wall of the sliding frame (8) and abuts against the rear side wall of the moving frame (7).

4. The crankshaft machining quality inspection equipment according to claim 3, characterized in that: The device power supply (14), fixed resistor (16) and sliding rheostat (602) are connected in series.

5. The crankshaft machining quality inspection equipment according to claim 1, characterized in that: The end fixing mechanism (3) includes a fixing frame (301), the left side wall of the fixing frame (301) is provided with a placement hole (302), and the inner side of the fixing frame (301) is provided with two clamping plates (303). The clamping plates (303) are V-shaped and the two clamping plates (303) are located on the upper and lower sides of the right side end of the crankshaft (5) to be tested.

6. The crankshaft machining quality inspection equipment according to claim 5, characterized in that: The rotary drive mechanism (2) includes a drive motor (201), a rotating rod (203), and a mounting plate (205). The mounting plate (205) and the drive motor (201) are both fixed on the testing table (1). The output end of the drive motor (201) is fixedly connected to a drive gear (202). The left end of the rotating rod (203) passes through the mounting plate (205) and is fixedly connected to the right end of the fixed frame (301). The rotating rod (203) is rotatably connected to the mounting plate (205). A driven gear (204) is fixedly connected to the rotating rod (203). The drive gear (202) and the driven gear (204) mesh.

7. The crankshaft machining quality inspection equipment according to claim 5, characterized in that: Movable plates (304) are fixedly connected to both the front and rear ends of the two clamping plates (303). Two bidirectional screw rods (305) are rotatably connected to the lower inner wall of the fixed frame (301). The upper ends of the bidirectional screw rods (305) pass through the two movable plates (304) in sequence and are rotatably connected to the upper inner wall of the fixed frame (301). The thread directions of the connection between the two movable plates (304) and the bidirectional screw rods (305) are opposite. A rotating plate (308) is provided on the front side of the fixed frame (301). An adjusting worm gear (307) is fixedly connected to the rear end of the rotating plate (308). The rear end of the adjusting worm gear (307) passes through the front wall of the fixed frame (301) and is rotatably connected to the rear inner wall of the fixed frame (301). An adjusting worm wheel (306) is fixedly connected to both of the bidirectional screw rods (305). The adjusting worm wheel (306) and the adjusting worm gear (307) are compatible.

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