Inspection measuring tool for measuring angle and location degree of fan-shaped shaft keyway

Abstract

The utility model discloses an inspection measuring tool for measuring the angle and the position degree of a fan-shaped shaft keyway, and belongs to the technical field of inspection measuring tools. The utility model relates to an inspection measuring tool for measuring the angle and the location degree of a fan-shaped shaft keyway, which comprises a horizontal plate, the V-shaped supporting seats are fixedly mounted at the two ends of the horizontal plate; the floating seat is mounted on the horizontal plate; the clamp is fixedly mounted on the horizontal plate and is positioned on one side of the floating seat; the measuring seat is provided with the measuring pin in a sliding mode, the measuring pin is matched with the fan-shaped shaft key groove and used for detecting the angle and the position of the shaft key groove, the fan-shaped shaft to be detected is placed in the V-shaped supporting seat, the clamp is rotated to enable the floating seat to tightly press the fan-shaped shaft, the process is simple and fast, the preparation time needed by each time of measurement is greatly shortened, and meanwhile the measurement accuracy is improved. The measuring pin in the measuring seat is pushed to try to enter the key groove, and whether the angle and the position of the key groove are qualified is directly judged according to whether the measuring pin can be smoothly embedded.

Description

Technical Field

[0001] This utility model relates to the field of inspection measuring tools, and in particular to an inspection measuring tool for measuring the angle and position of a sector-shaped shaft keyway. Background Technology

[0002] In the field of mechanical manufacturing, especially for transmission devices and rotating equipment, sector shafts and their keyway designs play a crucial role. Keyways are used to accommodate keys, and the power transmission or connection function is achieved through the cooperation between the key and the keyway. As a special type of shaft part, sector shafts are widely used in high-end manufacturing industries such as automobiles, aviation, and machine tools, and are of great significance in ensuring the stability and safety of equipment operation.

[0003] With the increasing demands for product quality in modern industry, accurate measurement of the angle and position of the keyway of the sector shaft has become a key factor in ensuring its performance. Traditional manual measurement methods are not only time-consuming and labor-intensive, but also easily affected by human factors, resulting in inaccurate and unreliable measurement results. In addition, fixed-structure measuring devices are difficult to adapt to sector shafts of different sizes or types, and have poor flexibility. Utility Model Content

[0004] The purpose of this invention is to solve the problem that existing fixed-structure measuring devices are difficult to adapt to different sizes or types of sector shafts and have poor flexibility. Therefore, this invention proposes a measuring tool for measuring the angle and position of the keyway of a sector shaft.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] A measuring instrument for measuring the angle and position of a keyway on a sector shaft includes a horizontal plate, and further includes: a V-shaped support fixedly installed at both ends of the horizontal plate for placing the sector shaft to be measured; a floating seat installed on the horizontal plate for positioning the sector shaft to be measured; a clamp fixedly installed on the horizontal plate and located on one side of the floating seat, wherein the sector shaft to be measured is fixed in the measuring position when the clamp applies pressure; and a measuring seat on which a measuring pin is slidably installed, the measuring pin cooperating with the keyway of the sector shaft for detecting the angle and position of the keyway.

[0007] To define the angular direction of the keyway, preferably, the floating seat includes a base fixedly connected to the horizontal plate and a toothed block slidably disposed on the base, wherein the toothed block is adapted to the shaft teeth of the sector shaft to define the angular direction of the keyway.

[0008] To enhance the device's adaptability to workpieces of different sizes and shapes, guide shafts are symmetrically mounted on the base, and the toothed block has an internal mounting groove that matches the guide shaft. A spring is movably mounted on the guide shaft, and the two ends of the spring are fixed to the top surface of the base and the mounting groove, respectively.

[0009] To ensure that the toothed block has sufficient travel range in the vertical direction, the axial length of the guide shaft is further less than the in-groove length of the mounting groove.

[0010] To allow for quick adjustment and fixation of the sector shaft under test, and to ensure simple and efficient operation, preferably, the clamp is a horizontal manual quick clamp with a chuck threaded onto the contact end with the sector shaft.

[0011] To ensure uniform and stable force application, the direction of the force applied by the clamp to the sector shaft is perpendicular to the diameter of the sector shaft.

[0012] To ensure appropriate friction between the V-shaped support and the sector shaft under test, and to prevent unnecessary movement during the measurement process, thereby improving the accuracy of the measurement results, a hardened block is preferably fixedly installed on the contact surface between the V-shaped support and the sector shaft under test.

[0013] Compared with the prior art, this utility model provides an inspection gauge for measuring the angle and position of a sector-shaped shaft keyway, which has the following advantages:

[0014] 1. This inspection tool for measuring the angle and position of a sector shaft keyway involves placing the sector shaft to be measured in a V-shaped support and rotating the clamp to press the floating seat firmly against the sector shaft, ensuring its stability. This process is simple and quick, significantly reducing the preparation time required for each measurement. Simultaneously, the measuring pin in the measuring section is pushed to attempt to enter the keyway; whether the measuring pin can be successfully inserted directly determines whether the angle and position of the keyway are within acceptable limits. This method allows operators to quickly reach a conclusion without complex calculations or analysis, making it suitable for mass production and quality control scenarios.

[0015] 2. This inspection gauge for measuring the angle and position of the keyway of a sector shaft, with its V-shaped support and floating design, allows it to adapt to shafts of different diameters and shapes, thus expanding its application range.

[0016] 3. This inspection gauge for measuring the angle and position of the keyway of a sector shaft, by using a hardened block, ensures that the friction between the gauge and the sector shaft under test is moderate, and avoids potential damage to the surface of the workpiece being tested, which is especially important when processing precision or expensive parts. Attached Figure Description

[0017] Figure 1This is a schematic diagram of the overall structure of a testing gauge for measuring the angle and position of a sector-shaped shaft keyway, as proposed in this utility model.

[0018] Figure 2 This is a schematic diagram of the V-shaped support structure of a test gauge for measuring the angle and position of a sector-shaped shaft keyway, as proposed in this utility model.

[0019] Figure 3 This is an exploded view of the floating seat structure of a test gauge for measuring the angle and position of a sector-shaped shaft keyway, as proposed in this utility model.

[0020] Figure 4 This is a schematic diagram of the measuring part of an inspection gauge for measuring the angle and position of a sector-shaped shaft keyway, as proposed in this utility model.

[0021] In the diagram: 1. Horizontal plate; 2. V-shaped support; 201. Hardened block; 3. Floating seat; 301. Base; 302. Toothed block; 303. Guide shaft; 304. Mounting groove; 305. Spring; 4. Clamp; 401. Chuck; 5. Measuring seat; 6. Measuring pin. Detailed Implementation

[0022] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0023] In the description of this utility model, it should be understood that the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0024] Example:

[0025] Reference Figures 1-4The instrument includes a horizontal plate 1, which serves as the base platform for the entire inspection gauge, supporting all other components and ensuring that all parts operate on the same horizontal plane. It also includes: a V-shaped support 2, fixedly installed at both ends of the horizontal plate 1, used to place the sector shaft to be measured. The V-shaped design can accommodate shafts of different diameters while ensuring that the shaft is stably placed in the correct position; a floating seat 3, mounted on the horizontal plate 1 and located between the two V-shaped support seats 2, used to position the sector shaft to be measured; a clamp 4, fixedly installed on the horizontal plate 1 and located on one side of the floating seat 3. When the clamp 4 applies pressure, it transmits the pressure to the floating seat 3 through mechanical transmission, thereby firmly clamping the sector shaft to be measured and fixing it in the measurement position; and a measuring seat 5, fixedly installed on the horizontal plate 1, near the keyway area of ​​the sector shaft to be measured. A measuring pin 6 is slidably installed on the measuring seat 5, which cooperates with the keyway of the sector shaft to detect the angle and position of the keyway.

[0026] When using this inspection gauge for measurement, first place the sector shaft to be measured in the V-shaped support 2, then use the rotating clamp 4 to make the floating seat 3 press the sector shaft to ensure that it is stable and does not move. Next, push the measuring pin 6 in the measuring seat 5 to try to enter the keyway. The angle and position of the keyway are judged according to whether the measuring pin 6 can be successfully inserted. The whole process is quick and simple and is suitable for mass production and quality control scenarios.

[0027] The floating seat 3 includes a base 301 fixedly connected to the horizontal plate 1, and a toothed block 302 slidably disposed on the base 301. The toothed block 302 is adapted to the shaft teeth of the sector shaft to define the angular direction of the shaft keyway.

[0028] It should be noted that the surface of the toothed block 302 has undergone special treatment to reduce wear and improve wear resistance, thereby extending its service life.

[0029] Guide shafts 303 are symmetrically mounted on the base 301 to ensure that the toothed block 302 floats up and down along a predetermined path. The toothed block 302 has a mounting groove 304 that matches the guide shaft 303, allowing the toothed block 302 to slide up and down along the guide shaft 303. A spring 305 is movably mounted on the guide shaft 303. The two ends of the spring 305 are fixed to the top surface of the groove in the base 301 and the mounting groove 304, respectively. The elastic force keeps the toothed block 302 in contact with the sector shaft to be tested under certain pressure, while allowing the toothed block 302 to automatically adjust according to the small deviation of the workpiece.

[0030] When the sector shaft to be measured is placed in the V-shaped support 2, the pressure applied by the clamp 4 is transmitted to the base 301 through mechanical transmission. At this time, the action of the spring 305 enables the toothed block 302 to fit tightly against the surface of the sector shaft, while allowing the toothed block 302 to float up and down according to the possible slight deviations of the shaft, thereby achieving precise positioning. This design not only improves the measurement accuracy, but also enhances the device's adaptability to workpieces of different sizes and shapes.

[0031] It should be noted that the axial length of the guide shaft 303 is less than the groove length of the mounting groove 304, ensuring that the toothed block 302 has a sufficient range of travel in the vertical direction. The longer mounting groove 304 provides additional safety margin, so that even in extreme cases, the toothed block 302 will not get stuck on the guide shaft 303.

[0032] The clamp 4 is a horizontal manual quick clamp, and the end of the clamp that contacts the sector shaft is threaded with a chuck 401.

[0033] The direction of the force applied by clamp 4 to the sector shaft is perpendicular to the diameter of the sector shaft.

[0034] The horizontal design ensures that the force is applied perpendicular to the radial direction of the sector shaft, guaranteeing uniform and stable force application and preventing workpiece deformation or damage due to improper force application. Furthermore, manual operation is simple and quick, making it suitable for mass production and quality control scenarios.

[0035] Working principle of horizontal manual quick clamp:

[0036] The operator turns the handle, which in turn drives the lever system;

[0037] The movement of the lever system is transmitted to the chuck 401 through a series of mechanical connections;

[0038] The chuck 401 moves along the track, gradually approaches the workpiece, and finally applies sufficient pressure to firmly fix it in the desired position;

[0039] In some designs, the locking mechanism automatically locks when a certain clamping force is reached to prevent accidental loosening.

[0040] When it is necessary to release the workpiece, the operator turns the handle in the opposite direction to unlock the locking mechanism, the chuck retracts, and the workpiece can be freely removed.

[0041] The structure of this fixture 4 is existing technology and will not be described in detail here.

[0042] A hardened block 201 is fixedly installed on the contact surface between the V-shaped support 2 and the sector shaft to be tested.

[0043] It should be noted that the hardened block 201 selects the most suitable hardening material, such as cemented carbide or ceramics, according to the actual application environment, in order to meet specific wear resistance and corrosion resistance requirements.

[0044] By increasing the hardness of the contact surface, the hardened block 201 can better fix the sector shaft to be measured, ensure that the friction between the block and the sector shaft is moderate, and prevent unnecessary movement during the measurement process, thereby improving the accuracy of the measurement results.

[0045] Place the sector shaft to be tested in the V-shaped support 2, ensuring it is in close contact with the hardened block 201. Select an appropriate chuck 401 and install it onto the fixture 4 via threads. Rotate the handle of the fixture 4 to press the chuck 401 against the sector shaft, ensuring it remains stable. Push the measuring pin 6 to move it linearly along the measuring seat 5, attempting to enter the keyway. Observe whether the measuring pin 6 can smoothly embed into the keyway, thereby evaluating whether the angle and position of the keyway are qualified. After the measurement is completed, rotate the handle in the opposite direction to release the chuck 401, remove the sector shaft, and prepare for the next measurement.

[0046] The above are merely preferred embodiments of this utility model, but the scope of protection of this utility model is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in this utility model, based on the technical solution and inventive concept of this utility model, should be included within the scope of protection of this utility model.

Claims

1. A measuring instrument for measuring the angle and position of a keyway in a sector-shaped shaft, comprising a horizontal plate (1), characterized in that, Also includes; V-shaped support base (2) is fixedly installed at both ends of the horizontal plate (1) and is used to place the sector shaft to be tested; A floating seat (3) installed on the horizontal plate (1) is used to position the sector shaft to be measured; The clamp (4) is fixedly installed on the horizontal plate (1) and located on one side of the floating seat (3). When the clamp (4) applies pressure, the sector shaft to be measured is fixed in the measurement position. Measuring seat (5), on which a measuring pin (6) is slidably mounted, the measuring pin (6) cooperating with the fan-shaped keyway of the shaft, is used to detect the angle and position of the keyway.

2. The inspection gauge for measuring the angle and position of a sector-shaped shaft keyway according to claim 1, characterized in that, The floating seat (3) includes a base (301) fixedly connected to the horizontal plate (1), and The toothed block (302) is slidably disposed on the base (301). The toothed block (302) is adapted to the shaft teeth of the sector shaft and is used to define the angular direction of the shaft keyway.

3. The inspection gauge for measuring the angle and position of a sector-shaped shaft keyway according to claim 2, characterized in that, Guide shafts (303) are symmetrically mounted on the base (301). The toothed block (302) has an installation groove (304) that matches the guide shaft (303). A spring (305) is movably mounted on the guide shaft (303). The two ends of the spring (305) are fixed to the top surface of the base (301) and the installation groove (304) respectively.

4. The inspection gauge for measuring the angle and position of a sector-shaped shaft keyway according to claim 3, characterized in that, The axial length of the guide shaft (303) is less than the groove length of the mounting groove (304).

5. The inspection gauge for measuring the angle and position of a sector-shaped shaft keyway according to claim 1, characterized in that, The clamp (4) is a horizontal manual quick clamp, and a chuck (401) is threaded onto the end of the fan-shaped shaft.

6. The inspection gauge for measuring the angle and position of a sector-shaped shaft keyway according to claim 5, characterized in that, The direction of the force applied by the clamp (4) to the sector shaft is perpendicular to the diameter of the sector shaft.

7. The inspection gauge for measuring the angle and position of a sector-shaped shaft keyway according to claim 1, characterized in that, A hardened block (201) is fixedly installed on the contact surface between the V-shaped support (2) and the sector shaft to be tested.

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