Motorcycle head tube alignment detection device

Abstract

The utility model discloses a motorcycle head pipe centering detection device, including the fixed device for fixing the frame and setting on the fixed device detection platform, still include with the head pipe of frame connection and limit the hemispherical holder of head pipe end center height, and the hemispherical holder can move freely on the detection platform, be equipped with the measuring device for detecting the head pipe horizontal position on the detection platform, the sum of detection platform height and the radius of hemispherical holder is the height of the end center point of head pipe when in the centering position, and the measuring device includes the positioning plate of setting on the detection platform and sets up the distance measuring device for measuring its and the head pipe interval on the positioning plate, and this device can accurately detect the head pipe centering deviation.

Description

Technical Field

[0001] This utility model relates to motorcycle frames, and more particularly to a motorcycle head tube alignment detection device. Background Technology

[0002] The frame is the main load-bearing structure of a motorcycle. It organically connects the engine, transmission, rocker arm, braking system, steering system, fuel tank, seat, rack, suspension, electrical components, and exterior body panels, making the entire vehicle a cohesive whole. The motorcycle frame supports the engine, power transmission, rider, load, steering mechanism, electrical components, and withstands the road reaction forces transmitted from the shock absorbers. Therefore, it is crucial that the dimensions of the motorcycle frame meet design requirements.

[0003] When inspecting the dimensions of a motorcycle frame, the frame must be fixed in place before checking the alignment of the head tube. It is only meaningful to check the other dimensions of the frame if the head tube is aligned. Existing testing devices include a fixing device for securing the frame, where all mounting positions are fixed, ensuring the frame is in a uniform standard position. A testing platform is mounted on the fixing device, and a connector for inserting the head tube is fixed to this platform. If the frame can be inserted into the connector and secured to the fixing device, the head tube is considered aligned. However, the connector's size is generally smaller than the head tube's inner diameter. Therefore, when the head tube alignment deviation is not too large, forced insertion can still result in the head tube being inserted into the connector and the frame being secured to the fixing device. In this case, the alignment deviation is assumed to meet the requirements. However, frames with high deviation requirements do not actually meet the requirements. Therefore, a more accurate head tube alignment testing device for motorcycle frames is needed. Summary of the Invention

[0004] Purpose of the utility model: The purpose of this utility model is to provide a motorcycle head tube alignment detection device that can accurately detect head tube alignment deviation.

[0005] Technical solution: The motorcycle head tube alignment detection device of this utility model includes a fixing device for fixing the frame and a detection platform set on the fixing device. It also includes a hemispherical support connected to the head tube of the frame and limiting the center height of the end of the head tube. The hemispherical support can move freely on the detection platform. The detection platform is equipped with a measuring device for detecting the horizontal position of the head tube.

[0006] The head tube is connected via a hemispherical support that can move freely on the testing platform. Due to the hemispherical shape of the support, the center of the head tube's end remains at a consistent height from the testing platform regardless of any angular deviation. This ensures all head tubes are tested at the same height. By determining the horizontal position of the head tube and calculating the deviation between the measured horizontal position and the horizontal position under alignment, the degree of alignment deviation can be determined. The testing platform is equipped with a measuring device to detect the horizontal position of the head tube, which, in conjunction with the hemispherical support, enables accurate detection of alignment deviation. Compared to fixing the connector on the testing platform for alignment detection, this device provides the head tube with sufficient freedom of movement within a preset horizontal plane through the hemispherical support. This allows for accurate measurement of any alignment deviation, regardless of its magnitude, thus improving the accuracy of alignment deviation detection.

[0007] Preferably, the sum of the height of the detection platform and the radius of the hemispherical support is the height of the center point of the end of the tube when it is in the centering position.

[0008] The platform height and hemispherical support radius meet the above settings, so that the end of the head tube in all the frames to be tested is at the correct height for centering. Only in this way can the detected centering deviation be used as a reference. If the head tube angle is deviated due to different heights, it will lead to deviation in the centering detection.

[0009] Preferably, the measuring device includes a positioning plate disposed on the detection platform and a distance measuring device disposed on the positioning plate for measuring the distance between the positioning plate and the head tube.

[0010] The positioning plate serves as a fixed spatial reference, while the ranging device directly and quantitatively provides the actual distance between the head tube and the positioning plate. This structure is simple and cost-effective.

[0011] Preferably, there are multiple positioning plates, and the detection platform is equipped with an installation plate, with the multiple positioning plates set at different heights on the installation plate.

[0012] Multiple positioning plates are set and mounted at different heights via mounting plates, enabling comprehensive detection of the head tube. The plates can capture the offset of the head tube at different heights, avoiding blind spots caused by insufficient measurement point distribution and improving the accuracy of centering deviation detection.

[0013] Preferably, the length direction of the positioning plate is parallel to the axis of the vehicle head tube.

[0014] The positioning plate is parallel to the distance between the head tubes along its length. This ensures that the distance between the positioning plate and the head tube in the aligned state is consistent at different heights, making it easier to calculate the degree of alignment deviation of the head tube based on the measured distance.

[0015] Preferably, the positioning plate comprises two plates with an included angle between (0°, 180°).

[0016] Setting up two non-parallel plates allows for the detection of the distance between the head tube and the positioning plate in two different directions. Since the center of the end of the head tube is fixed by the hemispherical bracket, the position of the head tube in the horizontal plane can be determined by detecting the distance in two different directions, thereby accurately measuring its centering deviation.

[0017] Preferably, the two sub-plates in the positioning plate are orthogonal to each other.

[0018] Setting the two plates to be orthogonal (i.e., with an included angle of 90°) is equivalent to establishing a standard Cartesian coordinate system. This makes the calculation of centering deviation extremely simple and intuitive, greatly facilitating data processing, recording, and qualification assessment.

[0019] Preferably, each sub-plate of the positioning plate is equipped with a measuring device for detecting the distance between the head tube and the head tube.

[0020] Each panel is equipped with a measuring device that can detect the distance between the head tube and the positioning plate in two different directions, accurately determine the position of the head tube on the horizontal plane, and thus accurately detect its alignment deviation.

[0021] Preferably, after the head tube is connected to the hemispherical support, the center of the end of the head tube coincides with the center of the hemispherical support.

[0022] The center of the end of the connected head tube coincides with the center of the hemispherical support, so that no matter how the head tube is tilted, the height of the center point of its end remains unchanged.

[0023] Beneficial effects: By connecting the head tube with a hemispherical bracket that can move freely on the testing platform, the height of the head tube is ensured to be fixed. Subsequently, as long as the position of the head tube in the horizontal plane is determined, the degree of centering deviation can be determined. Furthermore, by measuring the distance between the head tube and the positioning plate, the degree of offset between the head tube and the centering position can be accurately measured, thereby accurately measuring the centering deviation of the head tube. Attached Figure Description

[0024] Figure 1 This is a schematic diagram of the overall structure of the device; Figure 2 This is a schematic diagram of the exploded structure of this device; Figure 3 This is a schematic diagram of the hemispherical support structure. Detailed Implementation

[0025] As shown in the figure, the motorcycle head tube alignment detection device of this utility model includes a fixing device 1 for fixing the frame and a detection platform 2 set on the fixing device 1. It also includes a hemispherical support 4 connected to the head tube 3 of the frame and limiting the center height of the end of the head tube. The hemispherical support 4 can move freely on the detection platform 2. The detection platform 2 is equipped with a measuring device for detecting the horizontal position of the head tube 3.

[0026] The fixing device 1 is a common and standard device used in motorcycle frame inspection, and its structure will not be described in detail here. The attached drawings only show a partial structure of the fixing device 1. To highlight the structure of this device, most of the components of the fixing device 1 have been omitted. A testing platform 2 is provided on the fixing device 1. In this embodiment, the testing platform 2 is an L-shaped plate, in which the long plate is fixed to the fixing device 1 and the short plate is horizontally set to support the hemispherical support 4. In addition to the L-shaped plate, a protrusion can also be provided on the fixing device 1 as the testing platform 2. A horizontal surface should be provided on the protrusion to support the hemispherical support 4.

[0027] The hemispherical support 4 includes a hemispherical base 4-1. The plane of the hemispherical base 4-1 has a connecting part for inserting and connecting the head tube 3. In this embodiment, the connecting part is a protruding connecting cylinder 4-2. The axis of the connecting cylinder 4-2 is perpendicular to the plane of the hemispherical base 4-1. This ensures that after the connecting part is safely inserted into the head tube, the end of the head tube is flush with the plane of the hemispherical base 4-1. Thus, the center of the hemispherical support 4 coincides with the center of the end of the head tube. When the hemispherical support 4 is placed on the detection platform 2, because the curved surface of the hemispherical base 4-1 is tangent to the surface of the detection platform 2, regardless of the angle of the head tube 3, the distance between the center of its end and the surface of the detection platform 2 remains constant at the radius of the hemispherical support 4. The sum of the radius of the hemispherical support and the height of the detection platform 2 is the height corresponding to the center point of the end of the head tube 3 when it is in the center position. The hemispherical support 4 and the detection platform 2 are completely separate and independent; the hemispherical support 4 can be placed on the detection platform 2 and move freely.

[0028] The measuring device includes a positioning plate 5 mounted on the detection platform 2 and a ranging device mounted on the positioning plate 5 for measuring the distance between it and the head tube 3. Alternatively, it can be other measuring devices, such as existing devices capable of determining the position of an object, like a 3D scanning device. The ranging device can be a laser ranging device or other existing ranging devices.

[0029] Multiple positioning plates 5 can be set. The testing platform 2 is equipped with a mounting plate 6, and multiple positioning plates 5 are set at different heights on the mounting plate 6. The positioning plates 5 can be fixedly connected or slidably connected to the mounting plate 6. In addition to multiple positioning plates 5, only one positioning plate 5 can be set, but its length must match the length of the head tube 3 to allow for comprehensive testing of the head tube 3. The length direction of the positioning plate 5 is parallel to the axis of the head tube.

[0030] The positioning plate 5 includes two plates with an included angle between (0° and 180°), and the two plates can be orthogonal to each other. Each plate is equipped with a measuring device for detecting the distance between the head tube 3 and the plate. Each measuring device is set in a fixed position. The distance between the plate of the positioning plate 5 and the head tube 3 in the centering state at each set height is fixed. The centering deviation of the head tube 3 can be calculated by calculating the measured distance and the distance in the centering state.

Claims

1. A motorcycle head tube alignment detection device, comprising a fixing device (1) for fixing the frame and a detection platform (2) disposed on the fixing device (1), characterized in that: It also includes a hemispherical bracket (4) that is connected to the head tube (3) of the frame and limits the center height of the end of the head tube. The hemispherical bracket (4) can move freely on the testing platform (2). The testing platform (2) is equipped with a measuring device for detecting the horizontal position of the head tube (3).

2. The apparatus according to claim 1, characterized in that: The sum of the height of the detection platform (2) and the radius of the hemispherical support is the height of the center point of the end of the head tube (3) when it is in the centering position.

3. The apparatus according to claim 1, characterized in that: The measuring device includes a positioning plate (5) set on the detection platform (2) and a distance measuring device set on the positioning plate (5) for measuring the distance between it and the head tube (3).

4. The apparatus according to claim 3, characterized in that: There are multiple positioning plates (5), and the testing platform (2) is equipped with an installation plate (6). Multiple positioning plates (5) are set at different heights on the installation plate (6).

5. The apparatus according to claim 4, characterized in that: The positioning plate (5) is slidably connected to the mounting plate (6).

6. The apparatus according to claim 3, characterized in that: The length direction of the positioning plate (5) is parallel to the axis of the vehicle head tube.

7. The apparatus according to claim 3, characterized in that: The positioning plate (5) includes two plates with an included angle between (0°, 180°).

8. The apparatus according to claim 7, characterized in that: The two sub-plates in the positioning plate (5) are orthogonal to each other.

9. The apparatus according to claim 7, characterized in that: Each of the sub-plates of the positioning plate (5) is equipped with a measuring device for detecting the distance between the head tube (3) and the head tube.

10. The apparatus according to claim 1, characterized in that: After the head tube (3) is connected to the hemispherical support (4), the center of the end of the head tube (3) coincides with the center of the hemispherical support (4).

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