Axle shoulder dimension detection device

Abstract

The utility model discloses a kind of axle shoulder size detection devices, belong to railway axle detection technical field.The device includes fixed end replaceable measuring foot, "common" type support, measuring scale, readable activity block, movable end replaceable measuring foot;Two "common" type supports are installed on measuring scale, and this "common" type support can slide on measuring scale;The "common" type support includes: V-shaped frame, spring, set screw, guide rod, ruler body frame, cover plate, countersunk screw, top screw, V-shaped frame top two sides are connected with guide rod perpendicularly, spring is arranged on guide rod for adjusting up and down displacement, ruler body frame is fixed by set screw on both sides, ruler body frame can be moved up and down along guide rod to adjust the height position of the axle to be measured and measuring scale, cover plate is connected in the middle of ruler body frame, and cover plate top is fixed by countersunk screw, top screw, copper gasket.The device can quickly and accurately measure the axle shoulder size of straight platform or circular arc (sector) without straight platform shape.

Description

Technical Field

[0001] This utility model relates to a device for detecting the shoulder size of axles, belonging to the field of railway axle detection technology. Background Technology

[0002] In the process of railway vehicle inspection, ensuring that the axle shoulder distance is measured using a special axle shoulder distance template can only conform to the maximum and minimum dimensions, and cannot measure the specific distance dimension. This results in problems such as limited measurement distance, long production cycle, high cost, and low efficiency. Therefore, it is necessary to design a device and inspection method that can quickly and universally measure the axle shoulder dimension. Utility Model Content

[0003] To address the problems of limited sample inspection distance, long production cycle, high cost, and low efficiency in existing technologies, this utility model provides a vehicle axle shoulder dimension inspection device.

[0004] This utility model improves the measuring feet and the "common" type bracket based on the existing GF224 type axle full length ruler (measuring range 0-2600mm).

[0005] The technical solution adopted in this utility model is: A device for detecting the shoulder dimension of an axle includes: a fixed-end replaceable measuring foot, a common type bracket, a measuring scale, a readable movable block, a movable-end replaceable measuring foot, and a reference axle (an axle calibrated at 20°C). Two common type brackets are mounted on the measuring scale, and these brackets can slide on the measuring scale. The lower front end of the measuring ruler is connected to a fixed end with replaceable measuring feet, and the middle part is connected to a movable reading block. The lower part of the movable reading block is connected to a movable end with replaceable measuring feet. The "common" type bracket includes: a V-shaped frame, a spring, a set screw, a guide rod, a ruler frame, a cover plate, a countersunk screw, and a top screw. The guide rod is vertically connected to both sides of the top of the V-shaped frame. The spring is installed on the guide rod to adjust the vertical displacement. The ruler frame is fixed on both sides by set screws. The ruler frame can move up and down along the guide rod to adjust the height position of the axle to be measured and the measuring ruler. The cover plate is connected to the middle of the ruler frame. The top of the cover plate is fixed by a countersunk screw, a top screw, and a copper washer.

[0006] The fixed end replaceable probe is of the same type as the movable end replaceable probe, and matches the shoulder of the axle to be tested. It includes one of rectangular probe, hemispherical probe, and fan-shaped plate probe, and different probes can be replaced according to the structure of the axle to be tested.

[0007] The axle length standard (reference axle) is used to calibrate the testing device of this utility model. The axle length standard is made of the same material as or similar to that of the axle. A common-type bracket is slidably placed in the middle of the reference axle wheel seat and fixed by screws on the top of the common-type bracket. The fixed end can be changed so that the measuring foot is positioned against the straight edge of one side of the reference axle or against the arc. The movable end can be changed so that the measuring foot is against the shoulder of the other side of the reference axle. The axial runout of the area to be measured (later the calibration area) is no greater than 0.02 mm. The length dimension of the area to be measured is determined by gauge block comparison or coordinate measuring machine measurement. The length is used according to the actual value (accurate to micrometers). The length variation of the calibration area is no greater than 0.02 mm.

[0008] The axle shoulder dimension detection device provided by this utility model has the following beneficial effects: (1) The device can quickly and accurately measure the shoulder dimensions of shafts with straight platforms or circular arc (fan) shapes without straight platforms; (2) The floating “common” type bracket is equipped with bolts to adjust the height of the bracket; (3) Rectangular measuring feet can detect the axial spacing with a straight platform, which reduces the design of special measuring tools, reduces the production cycle and cost, and improves the accuracy of measurement; (4) The whole device has a compact structure, is easy to operate, and is easy to use at the axle inspection site.

[0009] The present invention will be further described below with reference to the accompanying drawings and embodiments. Attached Figure Description

[0010] Figure 1 This is a schematic diagram of the structure of this utility model; Figure 2 The diagram shows the interchangeable probes; (a) rectangular probe, (b) hemispherical probe, (c) fan-shaped probe, (d) a schematic diagram of the connection between the fixed end and the fan-shaped probe, and (e) a side view of (d). Figure 3 A schematic diagram of a "common" type support; Figure 4 for Figure 3 Side view.

[0011] In the diagram: 1. Replaceable measuring foot at the fixed end; 2. Common type bracket; 3. Measuring scale; 4. Readable movable block; 5. Replaceable measuring foot at the movable end; 6. Reference axis; 2-1. V-block; 2-2. Spring; 2-3. Set screw; 2-4. Guide rod; 2-5. Scale body frame; 2-6. Cover plate; 2-7. Countersunk screw; 2-8. Top screw; 2-9. Copper washer. Detailed Implementation

[0012] Example

[0013] like Figure 1-4 As shown, an axle shoulder dimension detection device includes: a fixed-end replaceable measuring foot 1, a common type bracket 2, a measuring ruler 3, a readable movable block 4, a movable-end replaceable measuring foot 5, and a reference axle 6 (an axle whose length has been calibrated at 20°C). Two common type brackets 4 are mounted on the measuring ruler 3, and the common type brackets 4 can slide on the measuring ruler 3. The lower part of the front end of the measuring ruler 3 is connected to the fixed end of the replaceable measuring foot 1, and the middle part is connected to the movable reading block 4. The lower part of the movable reading block 4 is connected to the movable end of the replaceable measuring foot 5. The "common" type bracket 4 includes: a V-shaped frame 2-1, a spring 2-2, a set screw 2-3, a guide rod 2-4, a ruler frame 2-5, a cover plate 2-6, a countersunk screw 2-7, and a top screw 2-8. The top two sides of the V-shaped frame 2-1 are vertically connected to the guide rod 2-4. The spring 2-2 is installed on the guide rod for adjusting the vertical displacement. The two sides of the ruler frame 2-5 are fixed by the set screw 2-3. The ruler frame 2-5 can move up and down along the guide rod 2-4 to adjust the height position of the axle to be measured and the measuring ruler 3. The middle of the ruler frame 2-5 is connected to the cover plate 2-6. The top of the cover plate 2-6 is fixed by the countersunk screw 2-7, the top screw 2-8, and the copper washer 2-9.

[0014] The fixed-end replaceable probe 1 and the movable-end replaceable probe 5 are of the same type, matching the shoulder of the axle to be tested, including one of the following: rectangular probe (a), hemispherical probe (b), and fan-shaped plate probe (c). Figure 2 As shown, different probes can be replaced depending on the structure of the axle being tested.

[0015] The method for conducting detection using the detection device of this utility model includes the following steps: 1. Methods for inspecting axle shoulder dimensions, such as... Figure 1 Slide the left and right floating "common" type bracket into the middle of the reference shaft wheel seat, tighten the top screw of the "common" type bracket, loosen the side set screw to adjust the height, the fixed end can be replaced to contact the straight edge or be close to the arc, the movable end can be replaced to be close to the shoulder of the shaft on the other side, check the reading value, if the reading error does not exceed 0.02mm, it is normal to use, if the reading error exceeds 0.02mm, the correction value 'a' needs to be calculated.

[0016] 2. Use a wheel axle shoulder gauge to measure the shoulder of a normal axle. The reading plus the correction value is the final shoulder value.

[0017] Taking the GF224 axle as an example, the indication error of the axle length ruler is ±0.15mm, and the indication repeatability error is no more than 0.02mm. Before use, the axle length standard body should be calibrated. If the indication error does not exceed 0.02mm, it can be used normally. If the indication error exceeds 0.02mm, the correction value 'a' needs to be calculated. The normal test value plus the correction value is used, and the overall error is no more than 0.06mm.

Claims

1. A device for detecting the dimensions of an axle shoulder, characterized in that... include: The fixed end has replaceable measuring feet, a common type bracket, a measuring scale, a readable movable block, and a movable end has replaceable measuring feet; two common type brackets are installed on the measuring scale, and these common type brackets can slide on the measuring scale; The lower front end of the measuring ruler is connected to a fixed end with replaceable measuring feet, and the middle part is connected to a movable reading block. The lower part of the movable reading block is connected to a movable end with replaceable measuring feet. The "common" type bracket includes: a V-shaped frame, a spring, a set screw, a guide rod, a ruler frame, a cover plate, a countersunk screw, and a top screw. The guide rod is vertically connected to both sides of the top of the V-shaped frame. The spring on the guide rod is used to adjust the vertical displacement. The ruler frame is fixed on both sides by set screws. The ruler frame can move up and down along the guide rod to adjust the height position of the axle to be measured and the measuring ruler. The cover plate is connected to the middle of the ruler frame. The top of the cover plate is fixed by a countersunk screw, a top screw, and a copper washer.

2. The axle shoulder dimension detection device according to claim 1, characterized in that: The fixed end replaceable probe is of the same type as the movable end replaceable probe, and matches the shoulder of the axle to be tested, including one of rectangular probe, hemispherical probe, and fan-shaped plate probe.

3. The axle shoulder dimension detection device according to claim 1, characterized in that: The detection device is calibrated using a reference axis. The "common" type bracket is slidably placed in the middle of the reference axis wheel seat and fixed by the screw on the top of the "common" type bracket. The fixed end can be changed to be in the position of the probe against the straight edge of one side of the reference axis or against the arc. The movable end can be changed to be in the position of the probe against the shoulder of the other side of the reference axis.

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