Single-arm bottom fork testing fixture

Abstract

The utility model discloses a single-arm bottom fork testing fixture which comprises a fixing device and a calibrating device which are arranged on a bottom plate, a pushing cylinder and a flat fork head pipe left limit are oppositely arranged, a first bottom fork placing equal-height block is arranged between the pushing cylinder and the flat fork head pipe left limit, and a second bottom fork placing equal-height block is arranged at the rear end of a single-arm bottom fork. When the front end of the single-arm bottom fork is placed on the first bottom fork placing equal-height block and the rear end of the single-arm bottom fork is placed on the second bottom fork placing equal-height block, the pushing air cylinder is matched with the left limiting part of the bottom fork head pipe, and the single-arm bottom fork can be fixed in the horizontal direction. The clamping air cylinder is rotated, the first bottom fork placing equal-height block and the second bottom fork placing equal-height block are matched, the single-arm bottom fork can be fixed in the vertical direction, and the calibrating devices are correspondingly arranged near installation point hole positions of the single-arm bottom fork. The device is used for detecting the coaxiality of a single-arm bottom fork head tube, the position degree of each mounting point of a bottom fork, and the parallelism between the axis of the bottom fork head tube and the axis of a motor mounting hole.

Description

Technical Field

[0001] The utility model relates to the technical field of production and manufacturing of electric two-wheeled vehicles, in particular to a single-arm flat fork inspection tool. Background Art

[0002] The flat fork is an important structure on electric two-wheeled vehicles, used to connect the main body of the vehicle and the rear wheel. Electric vehicles with a single-arm flat fork are electric vehicles whose rear flat fork has only one arm to fix the rear wheel, bear the weight of the vehicle body, bear the power of the rear wheel drive and the pulling force when braking the rear wheel, maintain the stability of the vehicle body, and the use of a single-arm flat fork makes it easy to disassemble the rear wheel. The produced single-arm flat fork requires a special inspection fixture to detect whether the coaxiality of the flat fork head tube, the parallelism of the flat fork head tube axis and the axis of the motor mounting hole meet the standards. In the existing technology, a manual pusher is usually used to fix the single-arm flat fork on the inspection fixture, but this fixing method cannot guarantee the consistency of the clamping state of the product each time, which is easy to increase the error, thereby affecting the product's qualification rate. In addition, the existing inspection fixture is also unable to verify the position of each installation point of the flat fork, resulting in deviations in the depth of the installation points of each batch of products. Utility Model Content

[0003] The utility model aims to provide a single-arm flat fork inspection tool to address the defects of the prior art.

[0004] In order to solve the above technical problems, the present invention provides the following technical solutions:

[0005] The camming mechanism is configured to move the first and second camming blocks relative to each other, and the camming block is configured to move the first and second camming blocks relative to each other.

[0006] Furthermore, the calibration device includes a column, a handle, a calibration pin, a limit slot, and a limit flange. The bottom of the column is fixedly connected to the base plate, the handle is horizontally movably connected to the upper end of the column, the calibration pin is connected to the end of the handle facing the single-arm flat fork, and the shape and size of the calibration pin are adapted to the shape and size of the corresponding calibration installation point hole. The limit flange is connected to the rear end of the handle, and the limit slot is connected to the column. The limit slot is provided with a groove that matches the limit flange.

[0007] Furthermore, the diameter of the calibration pin is the difference between the diameter of the corresponding installation point hole and the tolerance limit of the installation point hole diameter.

[0008] Furthermore, the width of the groove is the sum of the thickness of the limiting flange and the plane position tolerance of the corresponding installation point hole.

[0009] Furthermore, the mounting point holes include a flat fork guard mounting point, a rear wheel mudplate mounting point, a shock absorber mounting point, a motor mounting shaft hole, and a disc brake column.

[0010] Furthermore, the pushing cylinder and the rotary clamping cylinder are controlled by air valve switches arranged on the base plate.

[0011] Furthermore, a handle is provided on the bottom plate.

[0012] Compared with existing technologies, the present invention has the following advantages: 1. This inspection fixture is used to check the coaxiality of the single-arm flat fork head tube, the position of each flat fork installation point, and the parallelism between the flat fork head tube axis and the motor mounting hole axis. It uses a clamping method that combines a pushing cylinder and a rotating clamping cylinder, avoiding the inability of commonly used manual pushers in the industry to ensure consistent clamping. 2. When checking the position of the installation points, the calibration device uses a limit flange and a limit notch to limit the maximum and minimum values ​​of the position according to the tolerance, ensuring that the depth of the hole position at each installation point is within the tolerance range. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 This is a schematic structural diagram of an embodiment of the utility model;

[0014] Figure 2 This is a schematic diagram of the structure of the calibration device according to an embodiment of the present utility model.

[0015] Among them: 1-base plate, 2-calibration device, 3-pushing cylinder, 4-rotating clamping cylinder, 5-left limit of flat fork head tube, 6-equal height block placed on the first flat fork, 7-equal height block placed on the second flat fork, 8-single-arm flat fork, 9-installation point hole, 10-air valve switch, 11-handle, 21-column, 22-handle, 23-calibration pin, 24-limit notch, 25-limit flange, 26-groove. DETAILED DESCRIPTION

[0016] In order to deepen the understanding of the present invention, the present invention will be further described in detail below with reference to the accompanying drawings. The embodiments are only used to explain the present invention and do not constitute a limitation on the scope of protection of the present invention.

[0017] In the description of the present invention, it should be understood that the terms "length", "width", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0018] In this utility model, unless otherwise expressly specified or limited, terms such as "installed," "connected," "connect," "fixed," and "set" should be understood in a broad sense. For example, they may refer to fixed connection, detachable connection, or integration; mechanical connection or electrical connection; direct connection or indirect connection through an intermediate medium; internal communication between two components or interaction between two components. Those skilled in the art will understand the specific meanings of the above terms in this utility model based on specific circumstances.

[0019] Figure 1 The present invention shows a specific embodiment of a single-arm flat fork inspection fixture, comprising a base plate 1, a fixing device and a calibration device 2 mounted on the base plate 1. The fixing device includes a pushing cylinder 3, a rotary clamping cylinder 4, a flat fork head tube left limiter 5, a first flat fork placement height block 6, and a second flat fork placement height block 7. The pushing cylinder 3 and the flat fork head tube left limiter 5 are positioned opposite each other, the first flat fork placement height block 6 is positioned between the pushing cylinder 3 and the flat fork head tube left limiter 5, the second flat fork placement height block 7 is positioned at the rear end of a single-arm flat fork 8, and the rotary clamping cylinder 4 is positioned to the side of the single-arm flat fork 8. When the front end of the single-arm flat fork 8 is placed on the first flat fork placement equal height block 6 and the rear end is placed on the second flat fork placement equal height block 7, the pushing cylinder 3 and the flat fork head tube left limit 5 cooperate to fix the single-arm flat fork 8 in the horizontal direction, and the rotating clamping cylinder 4, the first flat fork placement equal height block 6 and the second flat fork placement equal height block 7 cooperate to fix the single-arm flat fork 8 in the vertical direction. The calibration devices are respectively arranged at the flat fork guard mounting point, rear wheel mudplate mounting point, shock absorber mounting point, motor mounting shaft hole, and disc brake column of the single-arm flat fork 8.

[0020] like Figure 2As shown, each calibration device 2 includes a column 21, a handle 22, a calibration pin 23, a limiting slot 24, and a limiting flange 25. The bottom of the column 21 is fixedly connected to the base plate 1, and the handle 22 is horizontally movably connected to the upper end of the column 21. The calibration pin 23 is connected to the end of the handle 22 facing the single-arm flat fork 8, and the shape and size of the calibration pin 23 are adapted to the shape and size of the corresponding calibration installation point hole 9. The limiting flange 25 is connected to the rear end of the handle 22, and the limiting slot 24 is connected to the column 21. The limiting slot 24 is provided with a groove 26 that matches the limiting flange 25. The diameter of the calibration pin 23 is the difference between the diameter of the corresponding installation point hole 9 and the tolerance limit of the diameter of the installation point hole. The width of the groove 26 is the sum of the thickness of the limiting flange 25 and the position tolerance of the corresponding installation point hole 9.

[0021] Preferably, the pushing cylinder 3 and the rotary clamping cylinder 4 are controlled by an air valve switch 10 provided on the base plate 1 , and a handle 11 is provided on the base plate 1 for easy transportation.

[0022] The specific working process of the above embodiment is as follows:

[0023] First, control the air valve switch 10 to open the pushing cylinder 3 and the rotary clamping cylinder 4, and place the processed single-arm flat fork 8 horizontally into the inspection fixture, wherein the head tube at the front end of the single-arm flat fork 8 is placed on the first flat fork placement equal height block 6, and the rear end is placed on the second flat fork placement equal height block 7. Then control the air valve switch 10 to start the pushing cylinder 3 and the rotary clamping cylinder 4, so that they press the single-arm flat fork 8 to the predetermined position from the horizontal direction and the vertical direction respectively. After confirming that the single-arm flat fork 8 is not loose, push and pull the handle 22 of each calibration device 2 until the limit flange 25 is just stuck in the groove 26 on the limit slot 24, so as to check whether there is any error in the front and rear position of the plane where each installation point hole 9 is located; the calibration pin 23 at the front end of the handle 22 is used to check whether the shape, size and coaxiality of each installation point hole 9 meet the standard.

[0024] The above specific implementation methods are only for illustrating the technical concept and structural features of the utility model, and the purpose is to enable relevant persons familiar with this technology to implement them accordingly. However, the above content does not limit the scope of protection of the utility model. Any equivalent changes or modifications made based on the spirit of the utility model should fall within the scope of protection of the utility model.

Claims

1. A single-arm flat fork inspection tool, comprising a base plate (1), and a fixing device and an inspection device (2) arranged on the base plate (1), characterized in that: The fixing device comprises a pushing cylinder (3), a rotating clamping cylinder (4), a left limiter (5) for the flat fork head tube, a first flat fork placement equal height block (6), and a second flat fork placement equal height block (7); the pushing cylinder (3) and the left limiter (5) for the flat fork head tube are arranged relative to each other; the first flat fork placement equal height block (6) is arranged between the pushing cylinder (3) and the left limiter (5) for the flat fork head tube; the second flat fork placement equal height block (7) is arranged at the rear end of the single-arm flat fork (8); and the rotating clamping cylinder (4) is arranged on the side of the single-arm flat fork (8). When the front end of the single-arm flat fork (8) is placed on the first flat fork placement equal height block (6) and the rear end is placed on the second flat fork placement equal height block (7), the pushing cylinder (3) cooperates with the flat fork head tube left limit (5) to fix the single-arm flat fork (8) in the horizontal direction, and the rotating clamping cylinder (4), the first flat fork placement equal height block (6) and the second flat fork placement equal height block (7) cooperate to fix the single-arm flat fork (8) in the vertical direction. The verification device (2) is correspondingly arranged near the various mounting point holes (9) of the single-arm flat fork (8).

2. A single-arm flat fork checking fixture according to claim 1, characterized in that: The calibration device (2) includes a column (21), a handle (22), a calibration pin (23), a limiting slot (24), and a limiting flange (25). The bottom of the column (21) is fixedly connected to the base plate (1). The handle (22) is horizontally movably connected to the upper end of the column (21). The calibration pin (23) is connected to one end of the handle (22) facing the single-arm flat fork (8), and the shape and size of the calibration pin (23) are adapted to the shape and size of the corresponding calibration installation point hole (9). The limiting flange (25) is connected to the rear end of the handle (22). The limiting slot (24) is connected to the column (21). The limiting slot (24) is provided with a groove (26) that matches the limiting flange (25).

3. The single-arm flat fork inspection tool according to claim 2, characterized in that: The diameter of the calibration pin (23) is the difference between the diameter of the corresponding installation point hole (9) and the tolerance limit.

4. The single-arm flat fork inspection tool according to claim 2, characterized in that: The width of the groove (26) is the sum of the thickness of the limiting flange (25) and the plane position tolerance of the corresponding installation point hole (9).

5. The single-arm flat fork inspection tool according to claim 2, characterized in that: The mounting point holes (9) include a flat fork guard mounting point, a rear wheel mud shoe mounting point, a shock absorber mounting point, a motor mounting shaft hole, and a disc brake column.

6. The single-arm flat fork inspection tool according to claim 1, characterized in that: The pushing cylinder (3) and the rotating clamping cylinder (4) are controlled by an air valve switch (10) arranged on the base plate (1).

7. The single-arm flat fork checking fixture according to claim 1, characterized in that: A handle (11) is provided on the bottom plate (1).

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