Crankshaft threaded hole location degree detection device

Abstract

The utility model discloses a crankshaft threaded hole location degree detection device, and belongs to the technical field of mechanical detection of engine crankshafts. The detection device comprises a handle, a positioning plate and a location degree detection column arranged on the positioning plate. The handle is mounted on the positioning plate through a nut, the positioning plate is a circular flat plate with a lug, and a positioning hole is formed in the center of the positioning plate. The position degree detection columns comprise two short flange threaded hole detection columns and a long wheel seat threaded hole detection column, and the three detection columns are fixed on the positioning plate through hexagon socket cylindrical bolts. The detection device is simple in design, convenient to operate and capable of rapidly and accurately detecting the position degree of the threaded hole in the crankshaft. According to the device, the labor cost is remarkably reduced, the production efficiency is improved, and the timeliness of product tracing is ensured.

Description

Technical Field

[0001] The utility model relates to a crankshaft threaded hole position detection device, which belongs to the technical field of mechanical detection of engine crankshafts. Background Art

[0002] As a core component of the engine, the crankshaft plays a crucial role. The threaded holes on its flange end are designed to securely connect to the gearbox flange, while the threaded holes on the signal wheel seat are specifically designed to mount the signal target wheel, ensuring precise synchronization of power transmission and signal. However, in actual production, this component faces the following challenges:

[0003] 1. Processing accuracy challenge: Occasionally, residual shavings will remain in the machine tool fixture during use, which will lead to large-scale deviations in the position of the crankshaft flange bolt hole and the signal wheel seat threaded hole, seriously affecting product quality.

[0004] 2. Limitations of random inspections: In the current processing inspection process, only one random inspection is conducted for every 50 products. This limited inspection frequency makes it difficult to ensure that all products meet the standards. Occasionally, crankshafts with excessive position accuracy are not discovered in time and may be mixed into the subsequent assembly process.

[0005] 3. Inefficient traceability: To prevent substandard crankshafts from entering the assembly line, 100% of all finished crankshafts must undergo thread hole position inspection. However, performing individual measurements at the inspection station during this process is not only labor-intensive and cumbersome, but also significantly increases overall inspection time and reduces production efficiency. Utility Model Content

[0006] To address the problems existing in the prior art, this utility model aims to provide a crankshaft threaded hole position detection device. This device rapidly detects the position of the engine crankshaft flange threaded hole and the signal wheel seat threaded hole. It is lightweight, handheld, efficient, accurate, and durable, meeting the high standards for engine crankshaft threaded hole position detection in industrial production. This device is designed to reduce labor load and improve production efficiency.

[0007] The technical solution adopted by the utility model to solve the technical problem is: a crankshaft threaded hole position detection device, which includes a handle, a positioning plate and a detection column. The handle is fixed to one side of the positioning plate by a handle screw and a handle nut; a detection column is provided on the other side of the positioning plate; the detection column includes a flange threaded hole detection column and a wheel seat threaded hole detection column;

[0008] The positioning plate is a circular flat plate with a lug, and a positioning hole that cooperates with the crankshaft guide wheel is set at the center of the positioning plate. Positioning plate threaded holes are evenly distributed on the circular flat plate. Cylindrical head bolts for connecting flange threaded hole detection columns are set at the positioning plate threaded holes, and the flange threaded hole detection columns are used to be inserted into the crankshaft flange threaded holes; the lugs are connected to the wheel seat threaded hole detection columns through the detection column connecting rod, and the wheel seat threaded hole detection columns are used to be inserted into the wheel seat threaded holes of the crankshaft.

[0009] Eight positioning plate threaded holes are evenly distributed on the positioning plate, and flange threaded hole detection columns are arranged at at least two of the positioning plate threaded holes.

[0010] The flange threaded hole detection column and the wheel seat threaded hole detection column are both cylindrical. The diameter of the flange threaded hole detection column is the lower limit of the inner diameter size tolerance zone of the crankshaft flange threaded hole, and the diameter of the wheel seat threaded hole detection column is the lower limit of the inner diameter size tolerance zone of the crankshaft wheel seat threaded hole.

[0011] The free end of the detection rod is provided with a guide taper for facilitating the insertion of the detection rod into the threaded hole.

[0012] The distance between the free end face of the wheel seat threaded hole detection column and the end face of the wheel seat threaded hole is equal to the distance between the free end face of the crankshaft flange threaded hole detection column and the end face of the crankshaft flange threaded hole.

[0013] Furthermore, the detection device includes a handle, a positioning plate, and a position detection component provided on the positioning plate;

[0014] The handle is designed to be easy to hold in an arc shape, and is easy to rotate and push. It is mounted on the positioning plate through a handle nut to ensure its stability during the detection process.

[0015] The positioning plate is a circular flat plate with a lug, a positioning hole in the center of which corresponds to the guide wheel of the crankshaft to be tested, the edge of the positioning hole is chamfered, eight hexagonal cylindrical bolts are installed on the positioning plate, and a hexagonal cylindrical bolt is also installed on the lug of the positioning plate.

[0016] The position detection component is composed of two flange threaded hole detection columns and a long wheel seat threaded hole detection column, wherein the two flange threaded hole detection columns are fixed on two of the eight hexagonal cylindrical bolts, and the long wheel seat threaded hole detection column is fixed on the hexagonal cylindrical bolt at the lug, and its position corresponds to the three threaded holes to be measured on the crankshaft. The three detection columns are all cylindrical, and their diameters are the lower limit of the inner diameter tolerance zone of the corresponding threaded hole to ensure smooth insertion. The three detection components are arranged in a triangle.

[0017] The beneficial effects of the utility model are:

[0018] (1) The device has two short flange threaded hole detection posts and one long wheel seat threaded hole detection post corresponding to the three threaded holes to be tested on the crankshaft. All three detection posts are cylindrical, and their diameters are the lower limit of the tolerance band of the corresponding threaded hole inner diameter to ensure smooth insertion. The three detection components are arranged in a triangular layout. The triangular layout design of the detection rod can efficiently utilize space and improve the stability of the structure; at the same time, it improves the accuracy of detection and avoids out-of-tolerance situations. The detection device has a simple design and is easy to operate. It can quickly and accurately detect the position of the threaded holes on the crankshaft.

[0019] (2) Operators no longer need to transport crankshaft workpieces to the measuring table for inspection. Instead, they can perform real-time measurements directly at the finished crankshaft off-line. This improvement significantly reduces labor burden, effectively reduces labor costs, improves production efficiency, and ensures the timeliness of product traceability.

[0020] (3) The positioning hole at the center of the positioning plate of the device is inserted into the guide wheel port of the crankshaft to be tested for rough positioning; then the handle is rotated to try to insert the detection rod into the corresponding threaded hole at the same time. The design structure of the positioning plate can fit tightly with the crankshaft to be tested, ensuring the accuracy and stability of the test.

[0021] (4) The surface of the detection rod has been tempered and carburized, and has high hardness and wear resistance. The top of the detection rod is chamfered to effectively protect the safety of the operator.

[0022] (5) The mutual judgment of the three detection rods improves the accuracy and reliability of the detection. The device is reusable, which reduces the detection cost. The device components in this solution are all designed with quick replacement, easy maintenance, compact structure and beautiful appearance. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 The present invention is a stereoscopic diagram of a crankshaft threaded hole position detection device.

[0024] Figure 2 The present invention is a front view of a crankshaft threaded hole position detection device.

[0025] Figure 3 The present invention is a side view of a crankshaft threaded hole position detection device.

[0026] Figure 4 The present invention is a working schematic diagram of a crankshaft threaded hole position detection device.

[0027] In the figure: 1. handle, 2. handle screw, 3. handle nut, 4. positioning plate, 5. lug, 6. positioning hole, 7. positioning plate threaded hole, 8. cylindrical head bolt, 9. flange threaded hole detection column, 10. detection column connecting rod, 11. wheel seat threaded hole detection column, 12. crankshaft, 13. crankshaft flange threaded hole, 14. crankshaft wheel seat threaded hole. DETAILED DESCRIPTION

[0028] Figures 1 to 4 A crankshaft threaded hole position detection device is shown, which includes: a handle 1, which is designed in an arc shape for easy gripping, easy rotation and pushing, and the gripping part of the handle 1 is provided with a non-slip rubber sleeve to improve the stability and comfort of gripping. The other end is fixedly connected to the positioning plate 4 by a handle nut 3; the positioning plate 2 is a circular flat plate with a lug 5, and a positioning hole 6 is provided in the center thereof to cooperate with the guide wheel of the crankshaft to be tested. There are 8 positioning plate threaded holes 7 evenly distributed on the positioning plate 4, and at least 2 positioning plate threaded holes 7 in the detection system are provided with cylindrical head bolts 8 for connecting flange threaded hole detection columns 9 at the positioning plate threaded holes 7. 2-8 flange threaded hole detection columns 9 can be provided.

[0029] In one specific embodiment, the detection posts include two flange threaded hole detection posts 9 and one wheel seat threaded hole detection post 11. These three detection posts are mounted on the positioning plate 4 via hexagon socket head bolts 8, and their positions correspond to the threaded holes to be tested on the crankshaft: the two flange threaded hole detection posts 9 correspond to the crankshaft flange threaded holes 13, and the one wheel seat threaded hole detection post 11 corresponds to the crankshaft wheel seat threaded hole 14. All three detection posts are cylindrical, with a diameter slightly smaller than the lower limit of the inner diameter tolerance band of the corresponding threaded hole. Their free ends are used to insert into the threaded holes for testing.

[0030] The center of the positioning plate 4 is also provided with a positioning hole 6 for cooperating with the guide wheel on the crankshaft to ensure the accuracy of the positioning plate during the detection process. The free end of the detection column is provided with a guide taper to facilitate the detection rod to be smoothly inserted into the threaded hole.

[0031] Two flange threaded hole inspection posts 9 are connected to cylindrical head bolts 8. A wheel seat threaded hole inspection post 11 is connected to the inspection post connecting rod 10 (or is integrally formed with the inspection post connecting rod 10). The inspection post connecting rod 10 is bolted to the lug 5. The inspection post and the positioning plate are both fixed by a detachable threaded connection, which facilitates the replacement of inspection rods of different diameters or lengths to accommodate threaded hole inspections of different specifications.

[0032] When using the above technical solution for testing, fix the crankshaft to be tested, and make the guide wheel of the crankshaft and the threaded hole to be tested correspond to the positioning hole 6 in the center of the positioning plate 4 and the detection system. The distance from the free end face of the wheel seat threaded hole detection column 11 to the end face of the wheel seat threaded hole is equal to the distance from the free end face of the flange threaded hole detection column 9 to the end face of the flange threaded hole. Then, push the device through the handle 1 to insert the positioning hole 6 in the center of the positioning plate 4 into the guide wheel port of the crankshaft to be tested as a rough positioning. Rotate the handle 1 and try to insert the flange threaded hole detection column 9 and the wheel seat threaded hole detection column 11 into the corresponding threaded holes at the same time, and ensure that the positioning plate 4 can fit tightly with the crankshaft to be tested.

[0033] If the three detection posts can be smoothly inserted into the corresponding three threaded holes at the same time, it is judged that the positioning is qualified; if any one of the detection posts cannot be inserted or is difficult to insert, it is judged that the positioning is unqualified.

[0034] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent replacements and improvements made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A crankshaft threaded hole position detection device, characterized in that: The device comprises a handle (1), a positioning plate (4) and a detection column, wherein the handle (1) is fixed to one side of the positioning plate (4) via a handle screw (2) and a handle nut (3); a detection column is provided on the other side of the positioning plate (4); the detection column comprises a flange threaded hole detection column (9) and a wheel seat threaded hole detection column (11); The positioning plate (4) is a circular flat plate with a lug (5). A positioning hole (6) that cooperates with the crankshaft guide wheel is provided at the center of the positioning plate (4). Positioning plate threaded holes (7) are evenly distributed on the circular flat plate. A cylindrical head bolt (8) for connecting a flange threaded hole detection column (9) is provided at the positioning plate threaded hole (7). The flange threaded hole detection column (9) is used to be inserted into the flange threaded hole of the crankshaft; the lug (5) is connected to the wheel seat threaded hole detection column (11) through the detection column connecting rod (10). The wheel seat threaded hole detection column (11) is used to be inserted into the wheel seat threaded hole of the crankshaft.

2. A crankshaft threaded hole position detection device according to claim 1, characterized in that: Eight positioning plate threaded holes (7) are evenly distributed on the positioning plate (4), and flange threaded hole detection columns (9) are provided at least at two of the positioning plate threaded holes (7).

3. The crankshaft threaded hole position detection device according to claim 1, characterized in that: The flange threaded hole detection column (9) and the wheel seat threaded hole detection column (11) are both cylindrical, the diameter of the flange threaded hole detection column (9) is the lower limit of the inner diameter size tolerance zone of the crankshaft flange threaded hole (13), and the diameter of the wheel seat threaded hole detection column (11) is the lower limit of the inner diameter size tolerance zone of the crankshaft wheel seat threaded hole (14).

4. The crankshaft threaded hole position detection device according to claim 1, characterized in that: The free end of the detection column is provided with a guide taper for facilitating the insertion of the detection column into the threaded hole.

5. The crankshaft threaded hole position detection device according to claim 1, characterized in that: The distance between the free end face of the wheel seat threaded hole detection column (11) and the end face of the crankshaft wheel seat threaded hole is equal to the distance between the free end face of the flange threaded hole detection column (9) and the end face of the crankshaft flange threaded hole.

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