Detection tool for camshaft detection

Abstract

The utility model relates to the technical field of detection equipment, in particular to a detection tool for camshaft detection. Comprising a detection table, V-shaped supporting frames and installation bases are installed on the two sections of the detection table at intervals, an installation shaft is rotationally installed on the two installation bases, a plurality of measuring rods are axially installed on the installation shaft in a sliding mode, adjusting screw rods are installed on the measuring rods in a threaded screwing mode, and a horizontal beam is installed between the two installation bases and located under the adjusting screw rods in a fastening mode. A digital display dial indicator is embedded in the measuring rod and located at the center line of the two supporting frames. Compared with a traditional micrometer which needs to pay attention to only measure a plurality of points during whole-circle measurement and needs to continuously move during whole-section measurement, the device can synchronously measure numbers through multiple groups of digital display dial gauges, can synchronously draw a conclusion, can directly display data, is more visual in comparison, and is more convenient to operate.

Description

Technical Field

[0001] The present application relates to the technical field of detection equipment, and in particular to a camshaft detection tool. Background Art

[0002] The camshaft is a component in piston engines. Its function is to control the opening and closing of the valves. Although the camshaft speed in a four-stroke engine is half that of the crankshaft (in a two-stroke engine, the camshaft speed is the same as the crankshaft), it is generally still very high and must withstand high torque. Therefore, high precision is required in the design of the camshaft. This requires testing of the camshaft diameter (the assembly reference), tolerance (roundness, runout), and adjacent tolerance of the camshaft's individual lobes.

[0003] Currently, many companies mainly use micrometers to detect these parameters. However, due to the long length of the camshaft and the large number of monitoring points, manual adjustment and detection one by one is tedious and unreliable, and the data comparison is not intuitive.

[0004] To this end, the present application provides a camshaft inspection fixture, which simplifies the operating steps of the camshaft shaft diameter full circle and full section inspection, improves the convenience of inspection; at the same time, it makes the comparison between adjacent shaft section data more intuitive and facilitates comparative observation. Utility Model Content

[0005] The purpose of this application is to solve the problems existing in the prior art and to propose a camshaft inspection tool.

[0006] In order to achieve the above objectives, this application adopts the following technical solutions:

[0007] A camshaft inspection fixture comprises an inspection platform, wherein two sections of the inspection platform are spaced apart and provided with V-shaped support frames and mounting seats, mounting shafts are rotatably mounted on the two mounting seats, a plurality of measuring rods are axially slidably mounted on the mounting shafts, and adjusting screws are threadedly mounted on the measuring rods, a horizontal beam is fastened and installed between the two mounting seats and directly below the adjusting screws, and a digital micrometer is embedded on the measuring rods at the center line of the two support frames.

[0008] Preferably, the testing platform is provided with a fixed seat and a movable seat on both sides of the two supporting frames, and an ejector pin is rotatably mounted on both the fixed seat and the movable seat, and a disc wheel is fastened to the ejector pin.

[0009] Preferably, the middle part of the two mounting seats is a hollow groove, and straight grooves are symmetrically provided on the V-shaped surface of the mounting seat, and limiting pressure wheels are placed in the straight grooves.

[0010] Preferably, a threaded hole is provided at the connection portion between the measuring rod and the mounting shaft, and a fastening screw is screwed into the threaded hole.

[0011] Preferably, a rail groove is provided at the bottom end of the movable seat, a slide rail slidingly matched with the rail groove is fixedly installed on the detection table, a screw threadedly connected to the movable seat is rotatably installed on the detection table, and a handle is fixedly installed at the end of the screw.

[0012] Preferably, friction damping is provided between the mounting shaft and the mounting seat.

[0013] Compared with the prior art, this application provides a camshaft inspection tool with the following beneficial effects:

[0014] When in use, the camshaft to be tested is placed on two support frames. The camshaft is restricted by the V-shaped structure of the support frame and remains relatively stable and will not shake easily. Move multiple measuring rods to different positions to be tested. Move the camshaft and observe the reading of the digital micrometer to obtain the corresponding full-circle value of the machined surface. Based on the numerical comparison between adjacent digital micrometers, numerical information such as the coaxiality of adjacent segments can be intuitively obtained. Compared with traditional micrometers, which require attention to measuring only multiple points when measuring the entire circle and need to be constantly moved when measuring the entire segment, this device uses multiple sets of digital micrometers to measure numbers simultaneously, and can draw conclusions simultaneously. The data is directly displayed, the comparison is more intuitive, and the operation is more convenient.

[0015] Other advantages, objectives and features of the present application will be described in part in the following description; and in part, will be apparent to those skilled in the art based on an examination of the following; or, may be taught from the practice of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is a three-dimensional schematic diagram of the present application.

[0017] Figure 2 This is a top view schematic diagram of this application.

[0018] Figure 3 It is a front view schematic diagram of this application.

[0019] Figure 4 For this application Figure 3 Schematic diagram of the cross section at AA.

[0020] Figure 5 This is a three-dimensional schematic diagram of the fixed seat and movable seat structure of this application.

[0021] Figure 6 This is a three-dimensional schematic diagram of the support frame structure of this application.

[0022] Figure 7 This is a three-dimensional schematic diagram of the assembly structure on the mounting base of this application.

[0023] In the figure: 1. Testing table; 2. Mounting seat; 3. Mounting shaft; 4. Measuring rod; 5. Adjusting screw; 6. Horizontal beam; 7. Support frame; 8. Limiting pressure wheel; 9. Camshaft; 10. Fixed seat; 11. Moving seat; 12. Ejector pin; 13. Disc pulley; 14. Lead screw; 15. Crank handle; 16. Digital micrometer; 17. Fastening screw. DETAILED DESCRIPTION

[0024] The following is a combination of the appended examples of the present application Figure 1-7 , the technical solutions in the embodiments of the present application are described clearly and completely. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments.

[0025] Example 1. In order to solve the problems existing in the prior art, this embodiment provides a camshaft inspection fixture, including a testing platform 1, wherein the two sections of the testing platform 1 are spaced apart and equipped with V-shaped support frames 7 and mounting seats 2, the two mounting seats 2 are rotatably equipped with mounting shafts 3, a plurality of measuring rods 4 are axially slidably equipped on the mounting shafts 3, and an adjusting screw 5 is threadedly installed on the measuring rod 4. A horizontal beam 6 is fastened between the two mounting seats 2 and located directly below the adjusting screw 5, and a digital micrometer 16 is embedded on the measuring rod 4 at the center line of the two support frames 7.

[0026] The axial sliding connection between the measuring rod 4 and the mounting shaft 3 is any one of a spline connection and a special-shaped structural connection in which a rectangular shaft and a rectangular hole are matched.

[0027] Torsion springs are installed between both ends of mounting shaft 3 and mounting base 2, keeping measuring rod 4 in a downward-biased position. Adjusting screw 5 rests against horizontal beam 6, keeping measuring rod 4 horizontal. This positions digital dial indicator 16 perpendicular to camshaft 9 to be tested, serving as the reference surface for testing. Adjusting the position of adjusting screw 5 allows for accurate measurement of camshafts 9 of varying diameters.

[0028] The mounting base 2 and the support frame 7 are both fastened and mounted on the testing platform 1 via fasteners.

[0029] According to the above technical solution:

[0030] During use, the mounting shaft 3 is rotated to unfold the measuring rod 4. The ends of the camshaft 9 to be tested are then placed on two support frames 7. The V-shaped structure of the support frames 7 stabilizes the camshaft 9 and prevents it from shaking. The mounting shaft 3 is then rotated again to reset the measuring rod 4. Multiple measuring rods 4 can be moved to different test positions. The camshaft 9 is manually adjusted, and the reading on the digital dial indicator 16 is observed to determine the corresponding full-circle value of the machined surface. Comparing the values ​​of adjacent digital dial indicators 16 provides intuitive information on the coaxiality of adjacent segments.

[0031] Compared with traditional micrometers that require attention to measuring only multiple points when measuring a full circle and need to be constantly moved when measuring a whole section, this device uses multiple sets of digital display micrometers 16 to measure numbers simultaneously, and can draw conclusions simultaneously. The data is directly displayed, making comparison more intuitive and operation more convenient.

[0032] In a further embodiment of this solution, manually rotating the camshaft 9 can easily cause the camshaft 9 to vibrate, affecting the accuracy of data detection. Therefore, in this embodiment, the detection platform 1 is provided with a fixed seat 10 and a movable seat 11 on both sides of the two support frames 7. A thimble 12 is rotatably mounted on each of the fixed seat 10 and the movable seat 11, and a disc wheel 13 is fastened to the thimble 12.

[0033] The camshaft 9 is clamped by two ejector pins 12 and rotated by turning the disc wheel 13. The camshaft 9 rests on a V-shaped support frame 7 and is restrained at both ends by the ejector pins 12, preventing jerking and shifting during rotation and improving detection accuracy. The threads on the lead screw 14 are self-locking, preventing slippage.

[0034] Preferably, in this embodiment, to enhance the tightness of the connection between ejector pin 12 and the end of camshaft 9, rectangular holes can be provided at both ends of camshaft 9, while the ends of ejector pin 12 are rectangular in shape. This rectangular fit not only secures the rectangular shaft but also prevents the camshaft 9 from loosening due to its own weight when driven to rotate. Alternatively, replacing ejector pin 12 on movable base 11 with a three-jaw chuck structure can also ensure stable clamping and driving of the camshaft 9.

[0035] In a further embodiment of this solution, both mounting seats 2 have a hollow center portion, and the V-shaped surfaces of the mounting seats 2 are symmetrically provided with straight grooves, within which limit pressure wheels 8 are placed. The limit pressure wheels 8 press the ends of the camshaft 9, reducing the vibration of the camshaft 9 during rotation, that is, to a certain extent, making the camshaft 9 rotate more smoothly.

[0036] In a further embodiment of this solution, a threaded hole is provided through the connection between the measuring rod 4 and the mounting shaft 3. A fastening screw 17 is threaded into the threaded hole. When the measuring rod 4 is placed in the testing position, the fastening screw 17 is tightened so that it abuts against the mounting shaft 3, thereby securing the measuring rod 4 and preventing it from deflecting during testing.

[0037] In a further embodiment of this solution, a rail groove is provided at the bottom end of the movable base 11, and a slide rail is fixedly mounted on the inspection platform 1 to slide in the rail groove. A lead screw 14 is rotatably mounted on the inspection platform 1 and threadedly connected to the movable base 11. A handle is fixedly mounted on the end of the lead screw 14. Shaking the handle rotates the lead screw 14, thereby driving the movable base 11 to move on the inspection platform 1, thereby clamping the camshaft 9 with the two sets of ejector pins 12.

[0038] Embodiment 6, in a further embodiment of this solution, a friction damper is provided between the mounting shaft 3 and the mounting seat 2. Cooperating with the torsion spring, it plays a role in stabilizing the measuring rod 4.

[0039] The above is only a preferred specific implementation method of the present application, but the scope of protection of the present application is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes based on the technical solution and application concept of the present application within the technical scope disclosed in the present application, and they should be covered by the scope of protection of the present application.

[0040] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present application. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art can combine and combine different embodiments or examples described in this specification and features of different embodiments or examples without contradiction.

[0041] Although the embodiments of the present application have been shown and described above, it can be understood that the above embodiments are exemplary and cannot be understood as limitations on the present application. Ordinary technicians in this field can change, modify, replace and modify the above embodiments within the scope of the present application.

Claims

1. A camshaft inspection tool, characterized in that: The invention comprises a testing platform (1), wherein two sections of the testing platform (1) are spaced apart and each section is provided with a V-shaped support frame (7) and a mounting seat (2), a mounting shaft (3) is rotatably mounted on the two mounting seats (2), a plurality of measuring rods (4) are axially slidably mounted on the mounting shaft (3), an adjusting screw (5) is screwed on the measuring rod (4), a horizontal beam (6) is fastened and mounted between the two mounting seats (2) and directly below the adjusting screw (5), and a digital micrometer (16) is embedded on the measuring rod (4) at the center line of the two supporting frames (7).

2. A camshaft inspection tool according to claim 1, characterized in that: The detection platform (1) is provided with a fixed seat (10) and a movable seat (11) on both sides of the two support frames (7), and a thimble (12) is rotatably mounted on the fixed seat (10) and the movable seat (11), and a disc wheel (13) is fastened to the thimble (12).

3. The camshaft inspection tool according to claim 1, characterized in that: The middle part of the two mounting seats (2) is a hollow groove, and the V-shaped surface of the mounting seat (2) is symmetrically provided with straight grooves, and the limiting pressure wheels (8) are placed in the straight grooves.

4. The camshaft inspection tool according to claim 1, characterized in that: A threaded hole is provided at the connection portion between the measuring rod (4) and the mounting shaft (3), and a fastening screw (17) is screwed into the threaded hole.

5. The camshaft inspection tool according to claim 2, characterized in that: A rail groove is provided at the bottom end of the movable seat (11), a slide rail that slides in cooperation with the rail groove is fixedly installed on the inspection platform (1), a lead screw (14) that is threadedly connected to the movable seat (11) is rotatably installed on the inspection platform (1), and a handle is fixedly installed at the end of the lead screw (14).

6. The camshaft inspection tool according to claim 1, characterized in that: Friction damping is provided between the mounting shaft (3) and the mounting seat (2).

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