Rapid detection tool for gear press-fitting angle detection

Abstract

The utility model discloses a gear press-fitting angle rapid detection tool comprising a polygonal handle sleeve, one end of the polygonal handle sleeve is connected with a positioning bottom plate, and the outer side of the positioning bottom plate is provided with a positioning pin inserted into a center hole of a camshaft and a first measuring pin. The first measuring pin is located on the outer side of the positioning pin and has a distance D with the positioning pin to form two points and one line, the outer wall of the cam shaft abuts against one side face of the measuring pin to achieve reference positioning of the cam shaft, and the head of the first measuring pin is inserted into one pin hole of the gear to be detected. A second measuring pin inserted into the other pin hole of the gear to be detected is movably inserted into the positioning bottom plate. The structure is simple, the test mode is simple and easy to implement, the precision and reliability are high, the measurement efficiency can be improved, the detection cost is low, and the on-line detection function is realized.

Description

Technical Field

[0001] The utility model belongs to the technical field related to inspection tools, and particularly relates to a quick inspection tool for detecting gear press-fit angles. Background Art

[0002] During the camshaft gear press-fitting process, it is necessary to ensure that the angle relationship between the gear and the camshaft is accurate. This is because the angle position of the gear directly determines the movement trajectory of the camshaft, which in turn affects the opening and closing time of the valve. If the press-fitting angle is deviated, it may cause the valve opening or closing time to be inaccurate, which in turn affects the combustion efficiency and performance of the engine.

[0003] With the continuous advancement of manufacturing technology, the camshaft gear press-fit angle technology is also developing. For example, the use of advanced numerical control technology and automated press-fit equipment can further improve the accuracy and efficiency of the press-fit process. At the same time, by optimizing material and process design, the friction and wear between the gear and the camshaft can also be reduced, improving the reliability and durability of the engine.

[0004] In short, the camshaft gear press angle technology is an indispensable part of engine manufacturing, and its accuracy and precision directly affect the performance and reliability of the engine. With the continuous advancement and development of manufacturing technology, this technology will continue to be optimized and improved. At present, the gear press angle is only measured by ADCOLE imported testing equipment such as the American ADCOLE crankshaft measuring machine. The purchase of imported products is relatively costly and cannot achieve online detection of the press process. Utility Model Content

[0005] The utility model aims to provide a quick inspection tool for gear press-fitting angle detection, which solves the problem that the existing gear press-fitting angle detection needs to purchase imported products with relatively high cost and cannot realize online detection of the press-fitting process.

[0006] In order to solve the above technical problems, the utility model is realized by the following technical solutions:

[0007] The utility model discloses a quick inspection tool for detecting the angle of gear press-fitting, comprising a polygonal handle sleeve, wherein a positioning base plate is connected to one end of the polygonal handle sleeve, a positioning pin and a measuring pin 1 which are inserted into the center hole of a camshaft are arranged on the outer side of the positioning base plate, the measuring pin 1 is located on the outer side of the positioning pin and has a spacing D with the positioning pin to form a two-point line, and the outer wall of the camshaft and the side surface of the measuring pin 1 are abutted against each other to realize the reference positioning of the camshaft, and the head of the measuring pin 1 is inserted into a pin hole of a gear to be detected, and a measuring pin 2 which is inserted into another pin hole of the gear to be detected is also movably plugged on the positioning base plate.

[0008] Preferably, the positioning pin comprises a second plug-in rod, a second limit rod, a limit seat and a handle mounting rod connected in sequence, the second plug-in rod is inserted into the center hole of the detection cam shaft, the handle mounting rod is outerly provided with the polygonal handle sleeve, the positioning base plate is sleeved outside the second limit rod, and one side of the positioning base plate is against one side of the limit seat, the diameter of the second plug-in rod is 9.95mm, with a deviation of ±0.01mm, the length of the second plug-in rod is 25mm, the length of the second limit rod is 15.5mm, the diameter of the limit seat is 18mm, and the diameter of the second plug-in rod is smaller than the diameter of the second limit rod, the diameter of the handle mounting rod is larger than the diameter of the second plug-in rod and smaller than the diameter of the second limit rod, and the diameter of the second limit rod is smaller than the diameter of the limit seat.

[0009] Preferably, the measuring pin comprises a positioning rod, a limiting rod with a diameter of 6 mm and a plug-in rod with a diameter of 8 mm which are connected in sequence, the plug-in rod is inserted into the first socket of the positioning base plate, the positioning rod is inserted into a pin hole of the gear to be detected, and one side edge of the limiting rod is abutted against the side wall of the camshaft to be detected.

[0010] Preferably, the diameter of the positioning rod is 3.909 mm with a deviation of ±0.005 mm, the length of the positioning rod is 5 mm, and the length of the limiting rod 1 is 10 mm.

[0011] Preferably, the measuring pin 2 comprises an insertion rod and a plug-in rod 3 which are connected in sequence, the plug-in rod 3 is inserted into the second plug hole of the positioning base plate, and the insertion rod is inserted into another pin hole of the gear to be detected.

[0012] Preferably, the diameter of the insertion rod is 4.872 mm, with a deviation of ±0.006 mm.

[0013] The utility model has the following beneficial effects: the structure is simple, the test method is simple and easy, and it has high accuracy and reliability, which is conducive to improving measurement efficiency, and the detection cost is low, and the online detection function is realized. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 This is a schematic diagram of the front structure of a quick inspection fixture for detecting the gear press-fitting angle in Example 1;

[0015] Figure 2 It is a schematic diagram of the side structure of the positioning base plate in Example 1;

[0016] Figure 3 is a schematic structural diagram of the positioning pin in Example 1;

[0017] Figure 4 It is a schematic diagram of the structure of the measuring pin 1 in Example 1;

[0018] Figure 5 This is a schematic diagram of the structure of measuring pin 2 in Example 1.

[0019] Reference numerals:

[0020] Polygonal handle cover 1, positioning base plate 2, first socket 201, second socket 202, positioning pin 3, measuring pin one 4, measuring pin two 5, plug-in rod two 301, limit rod two 302, limit seat 303, handle mounting rod 304, positioning rod 401, limit rod one 403, plug-in rod one 402, insertion rod 501, plug-in rod three 502. DETAILED DESCRIPTION

[0021] In order to make the purpose, technical solution and advantages of the embodiments of the utility model clearer, the technical solution in the embodiments of the utility model will be clearly and completely described below in combination with the embodiments of the utility model. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model. Example

[0022] See also Figure 1-5 As shown, a quick inspection tool for detecting the angle of gear press-fitting disclosed in this embodiment comprises a polygonal handle sleeve 1, a positioning base plate 2 is connected to one end of the polygonal handle sleeve 1, a positioning pin 3 inserted into the center hole of the camshaft and a measuring pin 4 are arranged on the outside of the positioning base plate 2, the measuring pin 4 is located on the outside of the positioning pin 3 and there is a spacing D between the positioning pin 3, forming a straight line between two points, and the outer wall of the camshaft abuts against the side of the measuring pin 4 to realize the reference positioning of the camshaft, and the head of the measuring pin 4 is inserted into a pin hole of the gear to be detected, and a measuring pin 2 5 inserted into another pin hole of the gear to be detected is also movably plugged on the positioning base plate 2.

[0023] Preferably, the positioning pin 3 comprises a plug rod 301, a limit rod 302, a limit seat 303 and a handle mounting rod 304 which are connected in sequence. The plug rod 301 is inserted into the center hole of the detection cam shaft. The handle mounting rod 304 is covered with the polygonal handle sleeve 1. The positioning base plate 2 is covered outside the limit rod 302, and one side of the positioning base plate 2 is against one side of the limit seat 303. The diameter of the plug rod 301 is 9. 95mm, there is a deviation of ±0.01mm, the length of the second connecting rod 301 is 25mm, the length of the second limiting rod 302 is 15.5mm, the diameter of the limiting seat 303 is 18mm, and the diameter of the second connecting rod 301 is smaller than the diameter of the second limiting rod 302, the diameter of the handle mounting rod 304 is larger than the diameter of the second connecting rod 301 and smaller than the diameter of the second limiting rod 302, and the diameter of the second limiting rod 302 is smaller than the diameter of the limiting seat 303.

[0024] Preferably, the measuring pin 4 includes a positioning rod 401, a limiting rod 403 with a diameter of 6 mm and a plug-in rod 402 with a diameter of 8 mm, which are connected in sequence. The plug-in rod 402 is inserted into the first socket 201 of the positioning base plate 2, the positioning rod 401 is inserted into a pin hole of the gear to be detected, the side of the limiting rod 403 is against the side wall of the camshaft to be detected, and the measuring pin 5 is located between the positioning pin 3 and the measuring pin 4.

[0025] Preferably, the diameter of the positioning rod 401 is 3.909 mm, with a deviation of ±0.005 mm, the length of the positioning rod 401 is 5 mm, and the length of the limiting rod 403 is 10 mm.

[0026] Preferably, the measuring pin 2 5 comprises an insertion rod 501 and a plug-in rod 3 502 which are connected in sequence, the plug-in rod 3 502 is inserted into the second plug hole 202 of the positioning base plate 2, and the insertion rod 501 is inserted into another pin hole of the gear to be detected.

[0027] Preferably, the diameter of the insertion rod 501 is 4.872 mm, with a deviation of ±0.006 mm.

[0028] In this structure, since the positioning pin 3 and the measuring pin 1 4 are in a straight line, the measuring pin 2 5 is used to detect whether the pin hole of the detection gear is at the specified angle to confirm whether the gear press-fitting angle is qualified. Later, the positioning pin 3, the measuring pin 1 4, and the measuring pin 2 5 are quenched to increase the hardness. Since there is a spacing D between the positioning pin 3 and the measuring pin 1 4 that is exactly equal to the cam diameter on the camshaft, the detection benchmark is confirmed. It should be noted that this structure is used to judge whether the gear press-fitting angle is qualified. It is a counting type inspection tool and cannot be used for gear press-fitting angle adjustment and detection. When using it, both hands are operated horizontally, holding the polygonal handle sleeve 1, and the positioning pin 3 and the measuring pin 1 4 are inserted into the center hole of the camshaft and a pin hole of the gear to be detected, tightly fitting to achieve reference positioning, and then the measuring pin 2 5 is gently pushed to smoothly insert the measuring pin 2 5 into the other pin hole of the gear to be detected. The gear press-fitting angle is judged to be qualified, that is, it passes smoothly, and the product is produced. The axial direction of the product is judged to be qualified; therefore, this structure determines the reference line by using the positioning pin and the measuring pin 1 4 on the inspection fixture. After determining the reference line, gently push the measuring pin 2 5 into a pin hole of the gear to be tested to verify whether the gear press-fitting angle is qualified. The positioning pin 3, the measuring pin 1 4, the measuring pin 2 5 and the positioning base plate 2 are integrally quenched, and the non-working surface is nickel-plated. The surface nickel plating is to improve the strength and hardness, prevent rust, and increase the service life. In addition, the hand-held operation is adopted, which makes the operation more convenient. In the later stage, the positioning pin and the measuring pin positioning reference line will cause wear. Regular inspection and replacement are carried out to ensure the accuracy of the inspection. The calibration cycle can be specified. When the product is adjusted and inspected for the first time, ADCOLE is used for inspection. The camshaft gear press-fitting angle detection is a quick inspection fixture for inspection. Therefore, the present structure is simple, the test method is simple and easy, and it has high accuracy and reliability, which is conducive to improving the measurement efficiency, and the inspection cost is low.

[0029] It should be noted that when manufacturing this device, the positions of measuring pin 1 4 and measuring pin 2 5 need to be determined in advance to ensure that they are just within the qualified range of the price product. Therefore, multiple calibrations are required when processing this device.

[0030] The above are only preferred embodiments of the present invention and do not limit the present invention. Any modification to the technical solutions recorded in the aforementioned embodiments and any equivalent replacement of some of the technical features therein, any modification, equivalent replacement, and improvement made are all within the protection scope of the present invention.

Claims

1. A quick inspection tool for detecting the angle of gear press fitting, comprising a polygonal handle sleeve (1), characterized in that: A positioning base plate (2) is connected to one end of the polygonal handle sleeve (1), and a positioning pin (3) and a measuring pin (4) are arranged on the outer side of the positioning base plate (2) and are inserted into the center hole of the camshaft. The measuring pin (4) is located on the outer side of the positioning pin (3) and is spaced apart from the positioning pin (3) by a distance D, forming a straight line between two points. The outer wall of the camshaft abuts against the side of the measuring pin (4) to achieve reference positioning of the camshaft. The head of the measuring pin (4) is inserted into a pin hole of the gear to be detected. A measuring pin (5) and a measuring pin (5) inserted into another pin hole of the gear to be detected are also movably connected to the positioning base plate (2).

2. The quick test fixture for detecting the gear press-fit angle according to claim 1 is characterized in that: The positioning pin (3) comprises a second plug-in rod (301), a second limit rod (302), a limit seat (303) and a handle mounting rod (304) which are connected in sequence. The second plug-in rod (301) is inserted into the central hole of the detection cam shaft. The handle mounting rod (304) is covered with the polygonal handle sleeve (1). The positioning base plate (2) is covered outside the second limit rod (302), and one side of the positioning base plate (2) abuts against one side of the limit seat (303). The diameter of the second plug-in rod (301) is 9. 95mm, with a deviation of ±0.01mm, the length of the second plug-in rod (301) is 25mm, the length of the second limit rod (302) is 15.5mm, the diameter of the limit seat (303) is 18mm, and the diameter of the second plug-in rod (301) is smaller than the diameter of the second limit rod (302), the diameter of the handle mounting rod (304) is larger than the diameter of the second plug-in rod (301) and smaller than the diameter of the second limit rod (302), and the diameter of the second limit rod (302) is smaller than the diameter of the limit seat (303).

3. The quick test fixture for detecting the gear press-fit angle according to claim 1 is characterized in that: The measuring pin 1 (4) comprises a positioning rod (401), a limiting rod 1 (403) with a diameter of 6 mm, and a plug-in rod 1 (402) with a diameter of 8 mm, which are connected in sequence. The plug-in rod 1 (402) is inserted into a first plug hole (201) of the positioning base plate (2), the positioning rod (401) is inserted into a pin hole of a gear to be detected, and the side edge of the limiting rod 1 (403) abuts against the side wall of the camshaft to be detected.

4. The quick test fixture for detecting the gear press-fit angle according to claim 3 is characterized in that: The diameter of the positioning rod (401) is 3.909 mm, with a deviation of ±0.005 mm. The length of the positioning rod (401) is 5 mm, and the length of the limiting rod 1 (403) is 10 mm.

5. The quick test fixture for detecting the gear press-fit angle according to claim 1 is characterized in that: The measuring pin 2 (5) comprises an insertion rod (501) and a plug-in rod 3 (502) which are connected in sequence, the plug-in rod 3 (502) is inserted into a second plug hole (202) of the positioning base plate (2), and the insertion rod (501) is inserted into another pin hole of the gear to be tested.

6. The quick test fixture for detecting the gear press-fit angle according to claim 5 is characterized in that: The diameter of the insertion rod (501) is 4.872 mm, with a deviation of ±0.006 mm.

7. The quick test fixture for detecting the gear press-fit angle according to claim 1 is characterized in that: The positioning base plate (2) is a water drop-shaped structure.

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