Special measuring tool for measuring inner hole of axle hub

Abstract

The utility model discloses a special measuring tool for measuring an axle hub inner hole, which comprises a measuring seat and a dial indicator, the measuring seat comprises a measuring head seat, a connecting rod and a connecting head, the upper end of the connecting rod is connected with the connecting head, and a measuring needle of the dial indicator is inserted into a middle hole of the connecting head; the lower end of the connecting rod is connected with a measuring head seat; a first fixed measuring head, a second fixed measuring head and a movable measuring head are arranged in the horizontal direction of the measuring head seat; the included angle between the axis of the first fixed measuring head and the axis of the second fixed measuring head is 72 degrees, the included angle between the axis of the first fixed measuring head and the axis of the movable measuring head is 144 degrees, and the included angle between the axis of the second fixed measuring head and the axis of the movable measuring head is 144 degrees. The axes of the first fixed measuring head, the second fixed measuring head and the movable measuring head are positioned in the same plane; according to the measuring tool, the existing inner diameter measuring tool is simply modified, the inner hole of the axle hub can be measured, the measuring precision is ensured, the detection speed is improved, and the cost is saved.

Description

Technical Field

[0001] The utility model belongs to the field of special measuring tools for measuring inner holes, and in particular relates to a special measuring tool for measuring the inner hole of a wheel hub of an axle. Background Art

[0002] The inner hole of the axle hub is plum blossom-shaped, and the bottom diameter of the inner hole is required to be very high. Most of the existing measuring tools are diagonal two-point measurement, which is prone to interference when measuring the inner hole of the axle hub and cannot be measured; if three-coordinate measurement is used for measurement, the measurement takes a long time. When a large number of axle hubs need to be measured, the three-coordinate measurement cannot meet the measurement needs; there is an urgent need for a method to solve this problem. Utility Model Content

[0003] In view of the problems existing in the background technology, the utility model provides a special measuring tool for measuring the inner hole of the axle wheel hub. The measuring tool is a simple modification of the existing inner diameter measuring tool and can measure the inner hole of the axle wheel hub.

[0004] To achieve the above-mentioned purpose, the utility model adopts the following technical scheme: a special measuring tool for measuring the inner hole of an axle wheel hub, comprising a measuring seat and a micrometer, the measuring seat comprising a probe seat, a connecting rod and a connecting head, the upper end of the connecting rod is connected to the connecting head, and the measuring needle of the micrometer is inserted into the middle hole of the connecting head; the lower end of the connecting rod is connected to the probe seat, and a first fixed probe, a second fixed probe and a movable probe are provided in the horizontal direction of the probe seat; the axis angle between the first fixed probe and the second fixed probe is 72°, the axis angle between the first fixed probe and the movable probe is 144°, and the axis angle between the second fixed probe and the movable probe is 144°; the axes of the first fixed probe, the second fixed probe and the movable probe are located in the same plane.

[0005] The axis of the connecting rod is perpendicular to the plane where the axes of the first fixed measuring head, the second fixed measuring head and the movable measuring head are located.

[0006] The top ends of the first fixed probe and the second fixed probe are equidistant from the axis of the connecting rod and are equidistant from the radius of the inner hole of the axle hub.

[0007] The distance between the top end of the movable probe and the axis of the connecting rod is greater than the radius of the inner hole of the axle wheel hub.

[0008] The beneficial effects of the utility model are as follows: the utility model provides a special measuring tool for measuring the inner hole of the axle wheel hub. The measuring tool is a simple modification of the existing inner diameter measuring tool and can measure the inner hole of the axle wheel hub, thereby improving the detection speed and saving costs while ensuring the measurement accuracy. BRIEF DESCRIPTION OF THE DRAWINGS

[0009] Figure 1 It is the front view of the utility model.

[0010] Figure 2 This is the AA cross-section view.

[0011] Figure 3 It is a schematic diagram of the use of the utility model.

[0012] In the figure: 1. first fixed probe, 2. second fixed probe, 3. movable probe, 4. probe seat, 5. connecting rod, 6. connecting head, 7. micrometer, 8. axle hub. DETAILED DESCRIPTION

[0013] The technical solution of the utility model will be clearly and completely described below in conjunction with the drawings in the specification. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all of the embodiments; based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the utility model.

[0014] The following is a further detailed description of the specific implementation of the utility model in conjunction with the accompanying drawings: a special measuring tool for measuring the inner hole of the wheel hub of an axle, comprising a measuring seat and a micrometer 7, wherein the measuring seat comprises a probe seat 4, a connecting rod 5 and a connecting head 6, wherein the upper end of the connecting rod 5 is connected to the connecting head 6, and the measuring needle of the micrometer 7 is inserted into the middle hole of the connecting head 6; the lower end of the connecting rod 5 is connected to the probe seat 4, and the probe seat 4 is provided with a first fixed probe 1, a second fixed probe 2 and a movable probe 3 in the horizontal direction; the first fixed probe 1, the second fixed probe 2 and The movable probe 3 is made of wear-resistant metal; the axes of the first fixed probe 1, the second fixed probe 2 and the movable probe 3 are located in the same plane; the axis of the connecting rod 5 is perpendicular to the plane where the axes of the first fixed probe 1, the second fixed probe 2 and the movable probe 3 are located; the axis angle between the first fixed probe 1 and the second fixed probe 2 is 72°, the axis angle between the first fixed probe 1 and the movable probe 3 is 144°, and the axis angle between the second fixed probe 2 and the movable probe 3 is 144°; the inner hole of the axle hub 8 is divided into five equal parts. Plum blossom shape, this measuring tool needs to measure the bottom diameter of the inner hole of the axle wheel hub 8, the angle between the two adjacent maximum bottom diameters is 72°, and the angle between the measuring heads is adapted to the bottom diameter of the inner hole of the axle wheel hub 8; the distance between the top of the first fixed probe 1 and the second fixed probe 2 and the axis of the connecting rod 5 is equal, and is equal to the radius of the inner hole of the axle wheel hub 8; at this time, when the first fixed probe 1 and the second fixed probe 2 are placed on the bottom diameter of the inner hole of the axle wheel hub 8, according to the principle of three points determining one surface, the axis of the connecting rod 5 just passes through the center of the inner hole of the axle wheel hub 8; in actual use In the embodiment, the lengths of the first fixed probe 1 and the second fixed probe 2 may also be slightly changed, but it is necessary to ensure that the top ends of the first fixed probe 1, the second fixed probe 2 and the movable probe 3 are located at the bottom diameter of the inner hole of the axle wheel hub 8, and the axes of the first fixed probe 1, the second fixed probe 2 and the movable probe 3 are located in the same plane; the distance between the top end of the movable probe 3 and the axis of the connecting rod 5 is greater than the radius of the inner hole of the axle wheel hub 8; the movable probe 3 can be elastically contracted, and the length of the movable probe 3 should be slightly longer than the measuring length, so that the measurement has a certain margin for easy operation.

[0015] The use process of the utility model is as follows: first, the measuring tool is calibrated on the standard part and then the measurement is carried out; when measuring, the measuring tool is first placed in the inner hole of the axle wheel hub 8, and when placing, the first fixed probe 1 and the second fixed probe 2 are placed at the bottom diameters of two adjacent inner holes; then the movable probe 3 is placed in the inner hole of the axle wheel hub 8, and at this time the movable probe 3 is also located at the bottom diameter of the inner hole, and the measurement is started, and the measured data can be read from the micrometer 7 at the upper end; after measuring one place, the position where the first fixed probe 1 and the second fixed probe 2 are placed is changed, and the same method is used to perform a second measurement to measure another measurement data; similarly, the measurement data of multiple different measurement positions can be obtained, and then the measurement data can be used to judge whether the inner hole of the axle wheel hub 8 is qualified.

[0016] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

[0017] The parts not described in detail in this utility model are prior art.

Claims

1. A special measuring tool for measuring the inner hole of a wheel hub of a vehicle axle, comprising a measuring seat and a micrometer (7), wherein the measuring seat comprises a probe seat (4), a connecting rod (5) and a connecting head (6), and wherein: The upper end of the connecting rod (5) is connected to the connecting head (6), and the measuring needle of the micrometer (7) is inserted into the middle hole of the connecting head (6); the lower end of the connecting rod (5) is connected to the probe base (4), and the probe base (4) is provided with a first fixed probe (1), a second fixed probe (2) and a movable probe (3) in the horizontal direction; the axis angle between the first fixed probe (1) and the second fixed probe (2) is 72°, the axis angle between the first fixed probe (1) and the movable probe (3) is 144°, and the axis angle between the second fixed probe (2) and the movable probe (3) is 144°; the axes of the first fixed probe (1), the second fixed probe (2) and the movable probe (3) are located in the same plane.

2. A special measuring tool for measuring the inner hole of axle hub according to claim 1, characterized in that: The axis of the connecting rod (5) is perpendicular to the plane where the axes of the first fixed measuring head (1), the second fixed measuring head (2) and the movable measuring head (3) are located.

3. A special measuring tool for measuring the inner hole of axle hub according to claim 1, characterized in that: The top ends of the first fixed probe (1) and the second fixed probe (2) are equidistant from the axis of the connecting rod (5) and are equidistant from the radius of the inner hole of the wheel hub of the vehicle axle.

4. A special measuring tool for measuring the inner hole of axle hub according to claim 1, characterized in that: The distance between the top end of the movable probe (3) and the axis of the connecting rod (5) is greater than the radius of the inner hole of the axle wheel hub.

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