A device for quickly detecting the position of crankshaft holes at both ends of a crankshaft and a method for using the device

Abstract

The present invention relates to a device for quickly detecting the position of crankshaft holes at both ends of a crankshaft and a method for using the device. The device comprises a detection base body, and a front nose end hole position detection mechanism and a flange end hole position detection mechanism are respectively provided at both ends of the detection base body. The front nose end hole position detection mechanism and the flange end hole position detection mechanism both comprise a taper pin and a taper pin seat for installing the taper pin. The taper pin is slidably connected to the taper pin seat. The number and position of the taper pins in the front nose end hole position detection mechanism are consistent with the reference number and reference position of the front nose end threaded hole of the crankshaft, and the number and position of the taper pins in the flange end hole position detection mechanism are consistent with the reference number and reference position of the flange end threaded hole of the crankshaft. The device detects whether the position of the crankshaft hole is qualified by whether the taper pin can be inserted into the threaded hole. The present invention can detect the position of all threaded holes of the crankshaft online, greatly shortening the measurement time. Moreover, the detection device has low cost, simple operation and accurate detection.

Description

Technical Field

[0001] The invention relates to a device for quickly detecting the position of crankshaft holes at two ends of a crankshaft and a use method thereof. Background Art

[0002] The two ends of the crankshaft are the front nose and the flange. The end faces of the front nose and the flange are both provided with crankshaft holes. The crankshaft holes include threaded holes and pin holes. The threaded holes and pin holes at both ends of the crankshaft are a very important assembly content in the engine assembly. The position accuracy requirements are very high. If the position accuracy exceeds the tolerance during the production and processing process, the product will not be assembled smoothly.

[0003] In the traditional crankshaft manufacturing process, the position of the threaded holes and pin holes at both ends of the crankshaft needs to be measured using a professional three-dimensional coordinate measuring instrument. It takes a long time (at least 1.5 hours of measurement time), is costly (each measuring instrument costs several million), and requires high-quality measurement personnel (need to be able to operate and program the three-dimensional coordinate measuring instrument). Therefore, testing with a three-dimensional coordinate measuring instrument will cause problems of long time and high cost. In addition, in order to save costs and production cycles, not all crankshafts are usually tested, but through shaft samples, which leads to the inability to guarantee that all threaded holes and pin holes at both ends of the crankshaft can meet the requirements.

[0004] The information disclosed in this background technology section is only intended to deepen the understanding of the general background technology of the present invention, and should not be regarded as acknowledging or suggesting in any form that the information constitutes the prior art known to those skilled in the art. Summary of the invention

[0005] The purpose of the present invention is to provide a device for quickly detecting the position of crankshaft holes at both ends of a crankshaft and a method for using the device, which solves the problems of high cost and long cycle when using a three-coordinate measuring instrument to detect the position of threaded holes and pin holes at both ends of a crankshaft in the prior art.

[0006] The objective of the present invention is achieved through the following technical solutions:

[0007] A device for quickly detecting the position of crankshaft holes at both ends of a crankshaft comprises a detection base, the detection base comprises a horizontally arranged detection platform, two ends of the detection platform are respectively provided with a front nose end hole position detection mechanism and a flange end hole position detection mechanism, a reference support for supporting the crankshaft is provided between the front nose end hole position detection mechanism and the flange end hole position detection mechanism, the front nose end hole position detection mechanism and the flange end hole position detection mechanism both comprise a taper pin and a taper pin seat for installing the taper pin, the diameter of the front end of the taper pin in the front nose end hole position detection mechanism is smaller than the diameter of the threaded hole at the front nose end of the crankshaft, the diameter of the front end of the taper pin in the flange end hole position detection mechanism is smaller than the diameter of the threaded hole at the flange end of the crankshaft, the number and position of the taper pins in the front nose end hole position detection mechanism are consistent with the reference number and reference position of the threaded hole at the front nose end of the crankshaft, and the number and position of the taper pins in the flange end hole position detection mechanism are consistent with the reference number and reference position of the threaded hole at the flange end of the crankshaft.

[0008] Preferably, the tapered pin seat of the front nose end hole position detection mechanism and the tapered pin seat of the flange end hole position detection mechanism both include a horizontal fixing plate, a vertical fixing plate and a tapered pin sleeve, the horizontal fixing plate is connected to the detection table, the vertical fixing plate is vertically connected to the horizontal fixing plate, and the tapered pin sleeve is vertically connected to the vertical fixing plate.

[0009] Preferably, the cone pin sleeve corresponds to the cone pin one by one, the cone pin is provided with a spring, the cone pin and the spring are installed together in the cone pin hole of the cone pin sleeve, and the spring provides a restoring force for the cone pin to return to its original position.

[0010] Furthermore, a pin hole detection device for detecting the position of the positioning pin hole at the flange end of the crankshaft is connected to the tapered pin seat of the flange end hole position detection mechanism.

[0011] Preferably, the tapered pin seat of the flange end hole position detection mechanism is slidably connected to the detection platform, and the position where the flange end hole position detection mechanism is installed on the detection platform is horizontally connected to a work station plate, and a slide rail is provided on the work station plate in a direction perpendicular to the tapered pin sleeve of the flange end hole position detection mechanism, and the horizontal fixed plate of the flange end hole position detection mechanism is slidably connected to the work station plate.

[0012] Preferably, the work plate includes a first work station and a second work station; when the flange end hole position detection mechanism is in the first work station of the work plate, the tapered pin in the flange end hole position detection mechanism is opposite to the threaded hole at the crankshaft flange end; when the flange end hole position detection mechanism is in the second work station of the work plate, the pin hole detection device connected to the tapered pin seat of the flange end hole position detection mechanism is opposite to the positioning pin hole at the crankshaft flange end.

[0013] Preferably, the pin hole detection device is a plug gauge with a surface, and the plug gauge with a surface is detachably vertically connected to the vertical fixing plate of the flange end hole position detection mechanism.

[0014] Furthermore, the detection platform is provided with an angular positioning reference component for positioning the crankshaft, and the angular positioning reference component includes a positioning bracket connected to the detection platform and a positioning adjustment block and a quick clamping device connected to the positioning bracket.

[0015] Furthermore, the inspection platform is provided with a safety protection device for preventing the crankshaft from falling, the safety protection device and the reference support are arranged on the same axis, and the safety protection device includes a fixed seat connected to the inspection platform and baffles connected to both sides of the fixed seat.

[0016] Furthermore, anti-collision protection blocks are provided at the top of the vertical fixing plate of the front nose end hole position detection mechanism and the top of the vertical fixing plate of the flange end hole position detection mechanism.

[0017] Furthermore, the following technical solutions are also included.

[0018] A method for using a device for quickly detecting the position of crankshaft holes at both ends of a crankshaft comprises the following steps:

[0019] 1) Place the crankshaft on the reference support of the inspection table to position the crankshaft;

[0020] 2) Check the position of the threaded hole at the front nose end of the crankshaft. Push the taper pin in the hole position detection mechanism at the front nose end by hand. If all taper pins can be inserted into the corresponding threaded holes, it means that the position of the threaded hole at the front nose end of the crankshaft is qualified. If there is a taper pin that cannot be inserted into the threaded hole, it means that the position of the threaded hole corresponding to this taper pin is unqualified.

[0021] 3) Check the position of the threaded hole at the crankshaft flange end. Push the taper pin in the flange end hole detection mechanism by hand. If all taper pins can be inserted into the corresponding threaded holes, it means that the position of the threaded hole at the crankshaft flange end is qualified. If there is a taper pin that cannot be inserted into the threaded hole, it means that the position of the threaded hole corresponding to this taper pin is unqualified.

[0022] Furthermore, the following technical solutions are also included.

[0023] A method for using a device for quickly detecting the position of crankshaft holes at both ends of a crankshaft comprises the following steps:

[0024] 1) Place the crankshaft on the reference support of the inspection table to position the crankshaft;

[0025] 2) Check the position of the threaded hole at the front nose end of the crankshaft. Push the taper pin in the hole position detection mechanism at the front nose end by hand. If all taper pins can be inserted into the corresponding threaded holes, it means that the position of the threaded hole at the front nose end of the crankshaft is qualified. If there is a taper pin that cannot be inserted into the threaded hole, it means that the position of the threaded hole corresponding to this taper pin is unqualified.

[0026] 3) Check the position of the threaded hole at the crankshaft flange end, make the flange end hole position detection mechanism be located at the first station, the taper pin in the flange end hole position detection mechanism is opposite to the threaded hole at the crankshaft flange end, push the taper pin in the flange end hole position detection mechanism by hand, if all taper pins can be inserted into the corresponding threaded hole, it means that the position of the threaded hole at the crankshaft flange end is qualified, if there is a taper pin that cannot be inserted into the threaded hole, it means that the position of the threaded hole corresponding to this taper pin is unqualified;

[0027] 4) Check the position of the locating pin hole at the crankshaft flange end. Place the flange end hole detection mechanism at the second station. Place the plug gauge opposite to the locating pin hole at the crankshaft flange end. Insert the plug gauge into the locating pin hole at the crankshaft flange end and rotate it. The reading of the plug gauge can be used to detect whether the position of the locating pin hole at the crankshaft flange end is within the tolerance range.

[0028] The beneficial effects of the present invention are:

[0029] The present invention can detect the position of all threaded holes and pin holes of the crankshaft online, which greatly shortens the measurement time (detection can be completed in 2 minutes). In addition, the detection device has low cost (cost of about 50,000 yuan), simple operation and accurate detection, which greatly improves the level of product quality control in the crankshaft production process. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 is a schematic structural diagram of a crankshaft detected in an embodiment of the present invention;

[0031] Figure 2 is a schematic diagram of the front nose end of the crankshaft detected in an embodiment of the present invention;

[0032] Figure 3 is a schematic diagram of a crankshaft flange end detected in an embodiment of the present invention;

[0033] Figure 4 A top view of a device for quickly detecting the position of crankshaft holes at both ends of a crankshaft according to an embodiment of the present invention (the flange end hole position detection mechanism is located at the first station);

[0034] Figure 5 for Figure 4 A top view of the hole position detection mechanism at the mid-front nose end;

[0035] Figure 6 for Figure 4 The front view of the hole position detection mechanism at the middle flange end;

[0036] Figure 7 It is a top view of the flange end hole position detection mechanism according to an embodiment of the present invention (the flange end hole position detection mechanism is located at the second station);

[0037] Figure 8 For along Figure 4 Cross-section along line AA;

[0038] Fig. 9 The figure is a schematic diagram of the structure of the safety protection device described in an embodiment of the present invention.

[0039] Description of reference numerals:

[0040] 1. Crankshaft; 2. Main journal; 3. Connecting rod journal; 4. Crank arm; 5. Front nose; 6. Flange; 7. Threaded hole at the front nose end of the crankshaft; 8. Threaded hole at the flange end of the crankshaft; 9. Positioning pin hole at the flange end of the crankshaft; 10. Detection base; 11. Detection table; 12. Hole position detection mechanism at the front nose end; 13. Hole position detection mechanism at the flange end; 14. Reference support; 15. First horizontal fixing plate; 16. First vertical fixing plate; 17. First taper pin sleeve; 18. Spring; 19. Taper pin; 20. Second horizontal fixing plate; 21. Second vertical fixing plate; 22. Second taper pin sleeve; 23. Plug gauge with dial; 24. Work station plate; 25. Slide rail; 26. Moving handle; 27. Support plate; 28. Angular positioning reference member; 29. ​​Positioning bracket; 30. Positioning adjustment block; 31. Quick clamping device; 32. Safety protection device; 33. Fixed seat; 34. Baffle; 35. Anti-collision protection block. DETAILED DESCRIPTION

[0041] The present invention will be further described below in conjunction with specific embodiments and corresponding drawings.

[0042] It should be understood that the accompanying drawings are not drawn to scale, but are only appropriately simplified drawings for illustrating various features of the basic principles of the present invention. The specific design features of the present invention disclosed herein include, for example, specific dimensions, directions, positions and shapes that will be determined in part by the specific environment in which they are to be applied and used.

[0043] In the attached multiple drawings, the same or equivalent components (elements) are marked with the same reference numerals.

[0044] like Figure 1 As shown, the crankshaft 1 includes a main journal 2, a connecting rod journal 3, a crank arm 4, and a front nose 5 and a flange 6 at both ends of the crankshaft. The crankshaft hole of the crankshaft includes a threaded hole and a locating pin hole. The end face of the front nose has only a threaded hole, and the end face of the flange has a threaded hole and a locating pin hole. During the production process of the crankshaft, the position of the threaded holes and the locating pin holes at both ends of the crankshaft needs to be detected to meet the assembly requirements.

[0045] like Figure 2-Figure 3As shown, in this example, the model of the crankshaft 1 to be tested is: 1005014-81D. In this model of crankshaft, the number of threaded holes 7 at the front nose end of the crankshaft is eight, the number of threaded holes 8 at the crankshaft flange end is twelve, and there is also a locating pin hole 9 at the crankshaft flange end.

[0046] like Figure 4-Figure 7 As shown, the device for quickly detecting the position of the crankshaft holes at both ends of the crankshaft described in the embodiment of the present invention includes a detection base 10, and the detection base 10 includes a horizontally arranged detection platform 11, and the two ends of the detection platform 11 are respectively provided with a front nose end hole position detection mechanism 12 and a flange end hole position detection mechanism 13, and a reference support 14 for supporting the crankshaft 1 is provided on the detection platform 11 and is located between the front nose end hole position detection mechanism 12 and the flange end hole position detection mechanism 13. The front nose end hole position detection mechanism 12 and the flange end hole position detection mechanism 13 both include taper pins and taper pin seats for installing taper pins, and the number and position of the taper pins in the front nose end hole position detection mechanism 12 are consistent with the reference number and reference position of the threaded holes 7 at the front nose end of the crankshaft, and the number and position of the taper pins in the flange end hole position detection mechanism 13 are consistent with the reference number and reference position of the threaded holes 8 at the flange end of the crankshaft. Figure 5 As shown, in this example, the front nose end hole position detection mechanism 12 includes a first horizontal fixing plate 15, a first vertical fixing plate 16 and eight first taper pin sleeves 17, the first horizontal fixing plate 15 is connected to the detection table 11, the first vertical fixing plate 16 is vertically connected to the first horizontal fixing plate 15, and the first taper pin sleeve 17 is connected to the first vertical fixing plate 16 and is perpendicular to the first vertical fixing plate 16. The number of the first taper pin sleeves 17 is consistent with the number of the crankshaft front nose end threaded holes 7 of the crankshaft 1 of this model. For the crankshaft of model 1005014-81D, the eight first taper pin sleeves 17 are arranged along the circumference and vertically connected to the first vertical fixing plate 16, and the positions of the taper pin holes of the eight first taper pin sleeves 17 are consistent with the reference positions of the crankshaft front nose end threaded holes 7 of the crankshaft 1 of this model. The front end diameter of the taper pin 19 is smaller than the diameter of the threaded hole for insertion into the threaded hole, and the difference between the front end diameter of the taper pin 19 and the diameter of the threaded hole can be determined according to the tolerance standard of the detection. The eight first cone pin sleeves 17 are respectively inserted into the cone pin 19 with the spring 18, the front of the cone pin 19 is installed in the first cone pin sleeve 17 and the front end of the cone pin 19 does not extend out of the first cone pin sleeve 17, and a part of the rear of the cone pin 19 is left outside the first cone pin sleeve 17. The remaining space at the rear of the cone pin 19 can be used to push the cone pin 19 from the rear end of the cone pin 19, so that the front end of the cone pin 19 extends out of the first cone pin sleeve 17, and then the cone pin 19 extends into the threaded hole 7 at the front nose end of the crankshaft, so as to detect whether the position of the threaded hole corresponding to the cone pin is qualified. Since the spring 18 is mounted on the cone pin 19, after the detection is completed and the hand is released, the cone pin 19 can automatically return to the initial position (that is, the front of the cone pin retracts into the first cone pin sleeve). Figure 5It is shown in the figure that one of the tapered pins 19 is pushed in, thereby being inserted into the threaded hole 7 at the front nose end of the crankshaft; while the remaining tapered pins 19 are not pushed.

[0047] If the taper pin 19 can be fully inserted into the threaded hole 7 at the front nose end of the crankshaft, it means that the threaded hole is qualified; if the taper pin 19 cannot be inserted into the threaded hole, or cannot be fully inserted into the threaded hole, it means that the threaded hole is unqualified. In the illustrated embodiment, a boss is provided at the end of the taper pin 19, and the boss contacts the rear surface of the first taper pin sleeve 17, which means that the taper pin 19 is fully inserted into the threaded hole 7 at the front nose end of the crankshaft.

[0048] The threaded hole can be tested by successively pushing the taper pin 19 to be inserted into the corresponding threaded hole at the front nose of the crankshaft. It is also possible to push multiple taper pins 19 each time to complete the detection of the threaded hole at one time.

[0049] like Figure 6-Figure 7 As shown, in this example, the flange end hole position detection mechanism 13 includes a second horizontal fixed plate 20, a second vertical fixed plate 21 and twelve second cone pin sleeves 22. The second vertical fixed plate 21 is vertically connected to the second horizontal fixed plate 20, and the second cone pin sleeve 22 is vertically connected to the second vertical fixed plate 21. A plug gauge mounting hole is provided on the second vertical fixed plate 21 on the other side relative to the side connected to the second cone pin sleeve 22, and the plug gauge 23 is detachably connected to the plug gauge mounting hole of the second vertical fixed plate 21. A work station plate 24 is horizontally connected to the position where the flange end hole position detection mechanism is installed on the detection table 11. A slide rail 25 is provided on the work station plate 24 in a direction perpendicular to the second cone pin sleeve 22 of the flange end hole position detection mechanism 13, and the second horizontal fixed plate 20 is slidably connected to the work station plate 24. A moving handle 26 is provided on the second horizontal fixed plate 20, which can be used to conveniently move the second horizontal fixed plate 20 on the work station plate 24 so that the flange end hole position detection mechanism is in a desired position. As shown in FIG. Figure 4 The position of the flange end hole position detection mechanism 13 shown in the figure is the first workstation. When the flange end hole position detection mechanism 13 is at the first workstation of the workstation plate 24, the taper pin 19 in the flange end hole position detection mechanism 13 is opposite to the crankshaft flange end threaded hole 8 for detecting the crankshaft flange end threaded hole 8; Figure 7 The position of the flange end hole position detection mechanism 13 shown in the figure is the second workstation. When the flange end hole position detection mechanism 13 is at the second workstation of the workstation plate 24, the plug gauge 23 with a table connected in the flange end hole position detection mechanism 13 is opposite to the crankshaft flange end locating pin hole 9 for detecting the crankshaft flange end locating pin hole 9.

[0050] In addition, the number of the second taper pin sleeves 22 is consistent with the number of the threaded holes 8 at the crankshaft flange end of the crankshaft 1 of this model, and the twelve second taper pin sleeves 22 are arranged along the circumference and vertically connected to the second vertical fixing plate 21, and the positions of the taper pin holes of the twelve second taper pin sleeves 22 are consistent with the reference positions of the threaded holes 8 at the crankshaft flange end of the crankshaft 1 of this model. The twelve second taper pin sleeves 22 are respectively inserted into the taper pin 19 with the spring 18, the front of the taper pin 19 is installed in the second taper pin sleeve 22 and the front end of the taper pin 19 does not extend out of the second taper pin sleeve 22, and a part of the margin is left at the rear of the taper pin 19 outside the second taper pin sleeve 22, and the margin left at the rear of the taper pin 19 can be used to push the taper pin 19 from the rear end of the taper pin 19, so that the front end of the taper pin 19 extends out of the second taper pin sleeve 22, and then the taper pin 19 extends into the threaded hole 8 at the crankshaft flange end, so as to detect whether the position of the threaded hole corresponding to the taper pin is qualified. Since the spring 18 is sleeved on the cone pin 19, after the detection is completed and the user is released, the cone pin 19 can automatically return to the initial position (that is, the front part of the cone pin is retracted into the second cone pin sleeve).

[0051] exist Figure 4 It is shown in FIG. 1 that one of the tapered pins 19 is pushed in, thereby being inserted into the threaded hole 8 at the crankshaft flange end; while the remaining tapered pins 19 are not pushed in.

[0052] If the taper pin 19 can be fully inserted into the threaded hole 8 at the crankshaft flange end, it means that the threaded hole is qualified; if the taper pin 19 cannot be inserted into the threaded hole, or cannot be fully inserted into the threaded hole, it means that the threaded hole is unqualified. In the illustrated embodiment, a boss is provided at the end of the taper pin 19, and the boss contacts the rear surface of the second taper pin sleeve 22, which means that the taper pin 19 is fully inserted into the threaded hole 8 at the crankshaft flange end.

[0053] The threaded hole can be tested by pushing the taper pin 19 in sequence and inserting it into the corresponding threaded hole at the crankshaft flange end. It is also possible to push multiple taper pins 19 each time to complete the detection of the threaded hole at one time.

[0054] like Figure 4 and Figure 8 As shown, in this example, two reference supports 14 are provided on the test bench 11, and the two reference supports 14 respectively support the main journals 2 at both ends of the crankshaft 1, and the two main journals 2 supported are respectively close to the front nose 5 and the flange 6 of the crankshaft, and the two reference supports 14 are fixed on the test bench 11 at positions corresponding to the two main journals 2 to be supported. The reference support 14 includes a support plate 27, and the support plate 27 is vertically fixed on the test bench 11, and a V-shaped groove for positioning the crankshaft is provided on the top of the support plate 27. The crankshaft can be effectively positioned on the test bench through the reference support, and the front nose end and the flange end of the crankshaft can be accurately aligned with their respective detection mechanisms after positioning.

[0055] Although it is described above that the main journal 2 of the crankshaft 1 is supported by a reference support 14 with a V-groove, those skilled in the art will understand that the reference support of the present invention can use various other support members in the field that can be used to support the crankshaft, and can support other parts of the crankshaft.

[0056] like Figure 4 and Figure 8 As shown, in this example, an angular positioning reference component 28 for further positioning the crankshaft 1 is provided on the testing platform 11. The angular positioning reference component 28 is used to position the connecting rod neck 3 of the crankshaft 1, thereby positioning the angle of the crankshaft, and aligning the threaded holes at both ends of the crankshaft with the corresponding taper pins of the testing mechanism. The angular positioning reference component 28 is fixed on the testing platform 11 at a position corresponding to the connecting rod neck 3 of the crankshaft 1. In this example, an angular positioning reference component 28 is provided on the testing platform 11. The angular positioning reference component 28 includes a positioning bracket 29 connected to the testing platform 11, and a positioning adjustment block 30 and a quick clamping device 31 connected to the positioning bracket 29. A connecting rod neck support is provided on the positioning bracket 29, and the positioning adjustment block 30 is connected to the connecting rod neck support. The quick clamping device 31 is rotatably connected to the top of the positioning bracket 29. The quick clamping device 31 and the positioning adjustment block 30 jointly clamp and position the connecting rod neck 3 to further position the crankshaft 1. Figure 8 The quick-clamp device 31 and the hand handle shown in solid lines are the positioned positions, while the dotted lines are the open positions. The positioned position is used to detect the threaded holes of the crankshaft; while in the open position, the crankshaft can be put in and taken out or the position of the crankshaft can be adjusted. On the basis of positioning the crankshaft by the reference support (the reference support is mainly used to position the main journal), the crankshaft's connecting rod journal is further positioned by the angular positioning reference member, thereby enhancing the positioning effect of the crankshaft and ensuring the accuracy of the detection.

[0057] like Figure 4 and Fig. 9 As shown, in this example, a safety protection device 32 for preventing the crankshaft from falling is provided on the test bench 11, and the safety protection device 32 and the reference support 14 are arranged on the same axis. In this example, two safety protection devices 32 are provided, and the two safety protection devices 32 are arranged between the two reference supports 14. The safety protection device 32 includes a fixed seat 33 connected to the test bench 11 and a baffle 34 connected to both sides of the fixed seat 33. The top of the fixed seat 33 is provided with an arc groove (it can also be a V-shaped or other shape that can play a limiting role) for limiting the main journal 2 of the crankshaft 1. The arc groove can limit the crankshaft, and the baffle can block the crankshaft from both sides to prevent it from falling from both sides.

[0058] like Figure 6 and Figure 8As shown, the top of the first vertical fixing plate 16 of the front nose end hole position detection mechanism 12 and the top of the second vertical fixing plate 21 of the flange end hole position detection mechanism 13 are both provided with an anti-collision protection block 35. It can be used to protect the cone pin and cone pin sleeve in the detection mechanism to prevent collision from affecting its position.

[0059] The process of quickly detecting the position of the crankshaft holes at both ends of the crankshaft according to the present invention is described below.

[0060] When using the device for quickly detecting the position of the crankshaft holes at both ends of the crankshaft described in this embodiment for detection:

[0061] 1) Place the crankshaft 1 on the reference support 14 of the inspection table 11; adjust the position and angle of the crankshaft, and install the angular positioning reference member 28 in place;

[0062] 2) Detect the position of the threaded hole 7 at the front nose end of the crankshaft, and push the taper pins 19 in the front nose end hole position detection mechanism 12 one by one by hand. If all taper pins can be inserted into the corresponding threaded holes, it means that the position of the threaded hole at the front nose end of the crankshaft is qualified. If there is a taper pin that cannot be inserted into the threaded hole, it means that the position of the threaded hole corresponding to this taper pin is unqualified;

[0063] 3) Detect the position of the threaded hole 8 at the crankshaft flange end, place the flange end hole position detection mechanism 13 at the first station, align the taper pin 19 in the flange end hole position detection mechanism 13 with the crankshaft flange end threaded hole 8, and push the taper pins 19 in the flange end hole position detection mechanism 13 one by one by hand. If all taper pins can be inserted into the corresponding threaded holes, it means that the position of the threaded hole at the crankshaft flange end is qualified. If there is a taper pin that cannot be inserted into the threaded hole, it means that the position of the threaded hole corresponding to this taper pin is unqualified;

[0064] 4) Detect the position of the locating pin hole 9 at the flange end of the crankshaft, and make the flange end hole position detection mechanism 13 located in the second station, and the plug gauge 23 is opposite to the locating pin hole 9 at the flange end of the crankshaft. When switching the station, if the plug gauge 23 interferes with the crankshaft 1, the plug gauge 23 can be not installed first. After the flange end hole position detection mechanism 13 moves into place, the plug gauge 23 is installed in the plug gauge installation hole of the second vertical fixed plate 21, and the plug gauge 23 is inserted into the locating pin hole 9 at the flange end of the crankshaft and rotated. 1 / 2 of the difference in the reading in the gauge can reflect the position of the locating pin hole at the flange end of the crankshaft. For example, if the needle of the plug gauge rotates 10 grids (each grid represents 0.01mm) after the plug gauge rotates one circle, the position of the pin hole of the product is 0.05mm. Whether the position of the pin hole is within the tolerance range can be detected by the reading of the plug gauge.

[0065] During the detection process, the detection can be performed in the above order or not. For example, steps 2) and 3) can be performed simultaneously, or step 3) can be performed first and then step 2); and step 4) can be performed first and then step 3). This change in order has no effect on the method of the present invention.

[0066] The present invention can detect the position of all threaded holes and pin holes of the crankshaft online, which greatly shortens the measurement time (detection can be completed in 2 minutes). In addition, the detection device has low cost (cost of about 50,000 yuan), simple operation and accurate detection, which greatly improves the level of product quality control in the crankshaft production process.

[0067] The foregoing description of specific exemplary embodiments of the present invention is presented for the purpose of illustration and description. The foregoing description is not intended to be exhaustive, nor is it intended to limit the present invention to the precise form disclosed, and it is apparent that many changes and variations are possible in light of the above teachings. The exemplary embodiments are selected and described to explain the specific principles of the present invention and its practical application, so that other technicians in the field can realize and utilize various exemplary embodiments of the present invention and various selected forms and modified forms thereof. The scope of the present invention is intended to be limited by the appended claims and their equivalents.

Claims

1. A device for quickly detecting the position of crankshaft holes at both ends of a crankshaft, characterized in that: It comprises a detection base, the detection base comprises a horizontally arranged detection platform, two ends of the detection platform are respectively provided with a front nose end hole position detection mechanism and a flange end hole position detection mechanism, a reference support for supporting a crankshaft is provided between the front nose end hole position detection mechanism and the flange end hole position detection mechanism, the front nose end hole position detection mechanism and the flange end hole position detection mechanism both comprise a taper pin and a taper pin seat for installing the taper pin, the diameter of the front end of the taper pin in the front nose end hole position detection mechanism is smaller than the diameter of the threaded hole at the front nose end of the crankshaft, the diameter of the front end of the taper pin in the flange end hole position detection mechanism is smaller than the diameter of the threaded hole at the flange end of the crankshaft, the number and position of the taper pins in the front nose end hole position detection mechanism are consistent with the reference number and reference position of the threaded hole at the front nose end of the crankshaft, and the number and position of the taper pins in the flange end hole position detection mechanism are consistent with the reference number and reference position of the threaded hole at the flange end of the crankshaft; The taper pin seat of the front nose end hole position detection mechanism includes a taper pin sleeve, the front part of the taper pin is installed in the taper pin sleeve and the front end of the taper pin does not extend out of the taper pin sleeve, and the rear part of the taper pin has a part of margin outside the taper pin sleeve, and the rear part of the taper pin has a margin so that when the taper pin is pushed from the rear end of the taper pin, the front end of the taper pin extends out of the taper pin sleeve, and then the taper pin extends into the threaded hole of the front nose end of the crankshaft; When the flange end hole position detection mechanism is in the first working position, the tapered pin in the flange end hole position detection mechanism is opposite to the threaded hole at the crankshaft flange end; when the flange end hole position detection mechanism is in the second working position, the pin hole detection device connected to the tapered pin seat of the flange end hole position detection mechanism is opposite to the positioning pin hole at the crankshaft flange end.

2. The device for quickly detecting the position of the crankshaft holes at both ends of the crankshaft according to claim 1, characterized in that: The tapered pin seat of the front nose end hole position detection mechanism and the tapered pin seat of the flange end hole position detection mechanism both include a horizontal fixing plate, a vertical fixing plate and a tapered pin sleeve. The horizontal fixing plate is connected to the detection table, the vertical fixing plate is vertically connected to the horizontal fixing plate, and the tapered pin sleeve is vertically connected to the vertical fixing plate.

3. The device for quickly detecting the position of the crankshaft holes at both ends of the crankshaft according to claim 2, characterized in that: The cone pin sleeve corresponds to the cone pin one by one, the cone pin is provided with a spring, and the cone pin and the spring are installed together in the cone pin hole of the cone pin sleeve, and the spring provides a restoring force for the cone pin to return to its original position.

4. The device for quickly detecting the position of the crankshaft holes at both ends of the crankshaft according to claim 3, characterized in that: The taper pin seat of the flange end hole position detection mechanism is connected with a pin hole detection device for detecting the position of the positioning pin hole at the crankshaft flange end.

5. The device for quickly detecting the position of the crankshaft holes at both ends of the crankshaft according to claim 4, characterized in that: The tapered pin seat of the flange end hole position detection mechanism is slidably connected to the detection platform, and the position where the flange end hole position detection mechanism is installed on the detection platform is horizontally connected to a work station plate. The work station plate is provided with a slide rail in a direction perpendicular to the tapered pin sleeve of the flange end hole position detection mechanism, and the horizontal fixed plate of the flange end hole position detection mechanism is slidably connected to the work station plate.

6. The device for quickly detecting the position of the crankshaft holes at both ends of the crankshaft according to claim 5, characterized in that: The work station plate includes the first work station and the second work station.

7. The device for quickly detecting the position of the crankshaft holes at both ends of the crankshaft according to claim 6, characterized in that: The pin hole detection device is a plug gauge with a surface, and the plug gauge with a surface is detachably connected vertically to the vertical fixing plate of the flange end hole position detection mechanism.

8. The device for quickly detecting the position of the crankshaft holes at both ends of the crankshaft according to claim 3, characterized in that: The detection platform is provided with an angular positioning reference component for positioning the crankshaft. The angular positioning reference component comprises a positioning bracket connected to the detection platform, and a positioning adjustment block and a quick clamping device connected to the positioning bracket.

9. The device for quickly detecting the position of the crankshaft holes at both ends of the crankshaft according to claim 3, characterized in that: The detection platform is provided with a safety protection device for preventing the crankshaft from falling. The safety protection device and the reference support are arranged on the same axis. The safety protection device includes a fixing seat connected to the detection platform and baffles connected to both sides of the fixing seat.

10. The device for quickly detecting the position of crankshaft holes at both ends of a crankshaft according to claim 3, characterized in that: The top of the vertical fixing plate of the front nose end hole position detection mechanism and the top of the vertical fixing plate of the flange end hole position detection mechanism are both provided with anti-collision protection blocks.

11. A method for using the device for quickly detecting the position of crankshaft holes at both ends of a crankshaft according to any one of claims 1 to 10, characterized in that: The following steps are involved: 1) Place the crankshaft on the reference support of the inspection table to position the crankshaft; 2) Check the position of the threaded hole at the front nose end of the crankshaft. Push the taper pin in the hole position detection mechanism at the front nose end by hand. If all taper pins can be inserted into the corresponding threaded holes, it means that the position of the threaded hole at the front nose end of the crankshaft is qualified. If there is a taper pin that cannot be inserted into the threaded hole, it means that the position of the threaded hole corresponding to this taper pin is unqualified. 3) Check the position of the threaded hole at the crankshaft flange end. Push the taper pin in the flange end hole detection mechanism by hand. If all taper pins can be inserted into the corresponding threaded holes, it means that the position of the threaded hole at the crankshaft flange end is qualified. If there is a taper pin that cannot be inserted into the threaded hole, it means that the position of the threaded hole corresponding to this taper pin is unqualified.

12. The method for using the device for quickly detecting the position of the crankshaft holes at both ends of the crankshaft according to claim 11, characterized in that: The following steps are involved: 1) Place the crankshaft on the reference support of the inspection table to position the crankshaft; 2) Check the position of the threaded hole at the front nose end of the crankshaft. Push the taper pin in the hole position detection mechanism at the front nose end by hand. If all taper pins can be inserted into the corresponding threaded holes, it means that the position of the threaded hole at the front nose end of the crankshaft is qualified. If there is a taper pin that cannot be inserted into the threaded hole, it means that the position of the threaded hole corresponding to this taper pin is unqualified. 3) Check the position of the threaded hole at the crankshaft flange end, make the flange end hole position detection mechanism be located at the first station, the taper pin in the flange end hole position detection mechanism is opposite to the threaded hole at the crankshaft flange end, push the taper pin in the flange end hole position detection mechanism by hand, if all taper pins can be inserted into the corresponding threaded hole, it means that the position of the threaded hole at the crankshaft flange end is qualified, if there is a taper pin that cannot be inserted into the threaded hole, it means that the position of the threaded hole corresponding to this taper pin is unqualified; 4) Check the position of the locating pin hole at the crankshaft flange end. Place the flange end hole detection mechanism at the second station. Place the plug gauge opposite to the locating pin hole at the crankshaft flange end. Insert the plug gauge into the locating pin hole at the crankshaft flange end and rotate it. The reading of the plug gauge can be used to detect whether the position of the locating pin hole at the crankshaft flange end is within the tolerance range.

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