Axle housing testing fixture

Abstract

The utility model discloses an axle housing testing fixture which comprises a main ruler and two testing rulers. A reference part is arranged on the bottom surface of the main ruler, a measurement reference surface attached to the main reduction surface of the axle housing is formed on the bottom surface of the reference part, positioning holes are formed in the two opposite sides of the reference part of the main ruler respectively, and the positioning holes vertically penetrate through the main ruler; the two detection rulers are located on the two opposite sides of the reference piece respectively. One detection ruler can be matched in one positioning hole in a vertically sliding mode, and the bottom end of the detection ruler protrudes out of the bottom face of the main ruler downwards. The bottom end of the detection ruler extends downwards, the bottom surface of the detection ruler forms a detection reference surface used for making contact with the axle housing detection surface, and a standard height difference exists between the detection reference surface and the measurement reference surface. Through the structural design, the two detection rulers respectively detect the height difference between the top walls at the two ends of the axle housing and the main reduction surface by taking the main reduction surface as a reference, so that the deformation size and direction of the axle housing can be accurately judged according to the height difference.

Description

Technical Field

[0001] The utility model relates to the technical field of measuring devices, in particular to a bridge housing inspection tool. Background Art

[0002] Cast steel bridge shells are prone to bending and deformation during heat treatment, resulting in product eccentricity, uneven wall thickness, etc. Therefore, it is necessary to use a gauge to detect the dimensions of both ends of the bridge shell to determine the deformation of the bridge shell. The existing bridge shell gauge includes a support beam, which is provided with a scale and tooth-shaped protrusions on opposite sides of the scale. The lower end of the scale extends to the bottom of the support beam, and the two protrusions are connected to the bottom surface of the gauge body. When inspecting the bridge shell, the bridge shell gauge is placed on the semi-shell, and the scale is required to be aligned with the center of the abdominal cavity of the semi-shell, and the two small teeth are aligned with the center of the two end circles; when the tooth-shaped protrusion contacts the shell at two places, the end face of the scale will contact the central plane of the abdominal cavity of the semi-shell, and the scale detection distance will be subtracted by 50mm to detect the height difference of the semi-shell. However, the above bridge shell gauge is inaccurate in detection, resulting in an inability to accurately determine whether the bridge shell is qualified. Utility Model Content

[0003] In view of the shortcomings of the prior art, the purpose of the utility model is to provide a bridge housing inspection fixture with accurate detection and simple structure. The bridge housing inspection fixture is provided with a detection ruler on the opposite sides of the reference part. The two detection rulers can accurately detect the height difference between the top wall of the bridge housing and the main reduction surface at both ends of the bridge housing.

[0004] To achieve the above purpose, the embodiment of the utility model adopts the following technical solutions:

[0005] Axle housing inspection fixture, including main scale and two inspection scales;

[0006] The bottom surface of the main scale is provided with a reference piece, the bottom surface of the reference piece forms a measurement reference surface for fitting with the main reduction surface of the axle housing, and the main scale is provided with positioning holes on opposite sides of the reference piece, and the positioning holes penetrate the main scale up and down;

[0007] The two detecting rulers are respectively located on opposite sides of the reference member, and one detecting ruler can be slidably fitted in one of the positioning holes up and down, and its bottom end protrudes downward from the bottom surface of the main ruler; the bottom end of the detecting ruler extends downward, and its bottom surface forms a detecting reference surface for contacting the bridge housing detecting surface, and there is a standard height difference between the detecting reference surface and the measuring reference surface.

[0008] Furthermore, the positioning hole includes a countersunk hole and a sliding hole, the countersunk hole is opened downward from the top surface of the main scale, and the sliding hole is opened downward from the bottom surface of the countersunk hole and passes through the bottom surface of the main scale, the diameter of the sliding hole is smaller than the diameter of the countersunk hole, and the top and bottom ends of the detection scale are respectively matched with the countersunk hole and the sliding hole.

[0009] Furthermore, a marking plane is formed inwardly on the outer peripheral wall of the top end of the detection ruler, and the marking plane extends along the axial direction of the detection ruler and is marked with scales.

[0010] Furthermore, a bushing is fitted in the positioning hole, and the detection ruler can be slidably fitted in the bushing up and down.

[0011] Furthermore, the reference member includes a first positioning pin and a second positioning pin located on one side of the first positioning pin, the first positioning pin and the second positioning pin are arranged on the bottom surface of the main scale, the bottom surfaces of the first positioning pin and the second positioning pin are on the same plane and the bottom surfaces of the two form a measurement reference plane.

[0012] Furthermore, the main scale extends axially along the bridge housing, the first locating pin extends radially along the bridge housing and the bottom surfaces at both ends thereof protrude downward to form a reference portion, the two reference portions are at the same height and are distributed circumferentially with the first locating pin along the main reduction surface of the bridge housing.

[0013] Furthermore, there are a plurality of positioning holes, and the plurality of positioning holes are evenly distributed along the length direction of the main ruler.

[0014] The bridge housing inspection fixture of the utility model is provided with a detection ruler on the opposite sides of the reference part. The two detection rulers can accurately detect the height difference between the top wall (i.e., the detection surface) and the main reduction surface of the bridge housing at both ends of the bridge housing, that is, the two detection rulers respectively detect the height difference between the top wall and the main reduction surface at both ends of the bridge housing with the main reduction surface as the reference, so that the deformation size and direction of the bridge housing can be accurately determined according to the height difference. The bridge housing inspection fixture of the utility model has the characteristics of simple structure, accurate detection, simple and intuitive operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a three-dimensional schematic diagram of the bridge housing inspection fixture of the embodiment of the utility model;

[0016] Figure 2 for Figure 1 The main view;

[0017] Figure 3 for Figure 2 A partial cross-sectional view of

[0018] Figure 4 for Figure 1 Usage status diagram. DETAILED DESCRIPTION

[0019] Below, in conjunction with the accompanying drawings and specific implementation methods, the utility model is further described:

[0020] like Figures 1 to 4As shown, an embodiment of the utility model provides a bridge housing inspection fixture for detecting the height difference between the two ends of the bridge housing 100 and the main reduction surface 101 of the bridge housing, including a main scale 1 and two detection scales 2, and the two detection scales 2 are connected to the main scale 1.

[0021] like Figure 1 , Figure 2 As shown, the main scale 1 extends along the axial direction of the bridge housing 100, and a reference piece 11 is provided on the bottom surface of the main scale 1. The bottom surface of the reference piece 11 forms a measurement reference surface 111 for fitting with the main reduction surface 101 of the bridge housing. The main scale 1 is provided with positioning holes 12 on opposite sides of the reference piece 11, and the positioning holes 12 pass through the main scale 1 (such as Figure 3 as shown).

[0022] like Figure 1 , Figure 2 and Figure 4 As shown, two detection rulers 2 are respectively located on opposite sides of the reference part 11, and one detection ruler 2 can be slidably fitted in a positioning hole 12 up and down, and its bottom end protrudes downward from the bottom surface of the main ruler 1. The top peripheral wall of the detection ruler 2 forms an identification plane 22 inward, and the identification plane 22 extends along the axial direction of the detection ruler 2 and is marked with scales; the bottom end of the detection ruler 2 extends downward, and its bottom surface forms a detection reference surface 21 for contacting the bridge housing detection surface 102, and there is a standard height difference between the detection reference surface 21 and the measurement reference surface 111, wherein the top wall of the bridge housing 100 is the bridge housing detection surface 102, and the standard height difference is B, which is the height difference marked on the design drawing, that is, B = the height difference between the bridge housing main reduction surface 101 (reference surface) and the bridge housing detection surface 102 (design drawing size). By respectively arranging a detection ruler 2 on the opposite sides of the reference member 11, the two detection rulers 2 can accurately detect the height difference between the top wall of the bridge housing 100 and the main reduction surface 101 at the two ends of the bridge housing 100, that is, the two detection rulers 2 respectively detect the height difference between the top wall at the two ends of the bridge housing 100 and the main reduction surface 101 with the main reduction surface 101 as the reference, so that the deformation size and direction of the bridge housing 100 can be accurately judged according to the height difference.

[0023] like Figure 1 , Figure 2 As shown, there are multiple positioning holes 12, and the multiple positioning holes 12 are evenly distributed along the length direction of the main scale 1, so as to facilitate the adjustment of the position of the detection scale 2 relative to the reference member 11 in the length direction of the main scale 1, and to facilitate replacement, so that the bridge housing inspection fixture can detect different types of bridge housings 100, thereby achieving the purpose of expanding the detection range. Figure 3As shown, in order to simplify the structure, further, the positioning hole 12 includes a countersunk hole 121 and a sliding hole 122, the countersunk hole 121 is vertically opened downward from the top surface of the main scale 1, the sliding hole 122 is vertically opened downward from the bottom surface of the countersunk hole 121 and penetrates the bottom surface of the main scale 1, the diameter of the sliding hole 122 is smaller than the diameter of the countersunk hole 121, and the top and bottom ends of the detection scale 2 are respectively matched with the countersunk hole 121 and the sliding hole 122. In another embodiment, in order to improve the positioning accuracy and facilitate replacement, a bushing (not shown) is matched in the positioning hole 12, and the detection scale 2 can be slidably matched in the bushing.

[0024] like Figure 1 , Figure 2 and Figure 4 As shown, the reference part 11 includes a first positioning pin 112 and a second positioning pin 113 located on one side of the first positioning pin 112. The first positioning pin 112 and the second positioning pin 113 are arranged on the bottom surface of the main scale 1. The bottom surfaces of the first positioning pin 112 and the second positioning pin 113 are on the same plane and the bottom surfaces of the two form a measurement reference surface 111, that is, two-point positioning, which can further improve the positioning accuracy. The first positioning pin 112 extends along the radial direction of the bridge housing 100 and the bottom surfaces of both ends thereof protrude downward to form a reference portion 1121. The two reference portions 1121 are of the same height and are distributed along the circumference of the bridge housing main reduction surface 101 with the first positioning pin 112. The second positioning pin 113 is detachably fixed to the bottom surface of the main scale 1 by bolts, so as to adjust the position of the second positioning pin 113 relative to the first positioning pin 112. It can be applied to the detection of bridge housings of different models and further expand the detection range.

[0025] When testing the axle housing 100, first set the initial value, that is, the scale of the detection ruler 2 is 0 (horizontal with the top surface of the main ruler 1). At this time, the height difference between the detection ruler 2 and the reference part 11 is equal to B, and then the first positioning pin 112 and the second positioning pin 113 are placed on the main reduction surface 101 of the axle housing, and the detection ruler 2 is placed on the detection surface 102 at both ends of the axle housing 100 and as close to the end of the axle housing 100 as possible, and read the value on the detection ruler 2. If the value is above the 0 scale line, it is the value of the upward deformation of this end of the axle housing 100. If the value is below the 0 scale line, it is the value of the downward deformation of this end of the axle housing 100. When testing other models of axle housings 100, first replace the corresponding detection ruler 2, then install the detection ruler 2 in the target positioning hole 12, and adjust the second positioning pin 113 to the target position before testing.

[0026] The bridge housing inspection fixture of the utility model is provided with a detection ruler on the opposite sides of the reference part. The two detection rulers can accurately detect the height difference between the top wall (i.e., the detection surface) and the main reduction surface of the bridge housing at both ends of the bridge housing, that is, the two detection rulers respectively detect the height difference between the top wall and the main reduction surface at both ends of the bridge housing with the main reduction surface as the reference, so that the deformation size and direction of the bridge housing can be accurately determined according to the height difference. The bridge housing inspection fixture of the utility model has the characteristics of simple structure, accurate detection, simple and intuitive operation.

[0027] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein, and these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the various embodiments of the present invention.

Claims

1. Axle housing inspection fixture, characterized in that: Includes main ruler and two detection rulers; The bottom surface of the main scale is provided with a reference piece, the bottom surface of the reference piece forms a measurement reference surface for fitting with the main reduction surface of the axle housing, and the main scale is provided with positioning holes on opposite sides of the reference piece, and the positioning holes penetrate the main scale up and down; The two detecting rulers are respectively located on opposite sides of the reference member, and one detecting ruler can be slidably fitted in one of the positioning holes up and down, and its bottom end protrudes downward from the bottom surface of the main ruler; the bottom end of the detecting ruler extends downward, and its bottom surface forms a detecting reference surface for contacting the bridge housing detecting surface, and there is a standard height difference between the detecting reference surface and the measuring reference surface.

2. The bridge housing inspection fixture according to claim 1, characterized in that: The positioning hole includes a countersunk hole and a sliding hole. The countersunk hole is opened downward from the top surface of the main scale, and the sliding hole is opened downward from the bottom surface of the countersunk hole and passes through the bottom surface of the main scale. The diameter of the sliding hole is smaller than the diameter of the countersunk hole. The top and bottom ends of the detection ruler are respectively matched with the countersunk hole and the sliding hole.

3. The bridge housing inspection fixture according to claim 2, characterized in that: A marking plane is formed inwardly on the outer peripheral wall of the top end of the detection ruler. The marking plane extends along the axial direction of the detection ruler and is marked with scales.

4. The bridge housing inspection fixture according to claim 1, characterized in that: A bushing is fitted in the positioning hole, and the detection ruler can be slidably fitted in the bushing up and down.

5. The bridge housing inspection fixture according to claim 1, characterized in that: The reference member includes a first positioning pin and a second positioning pin located on one side of the first positioning pin. The first positioning pin and the second positioning pin are arranged on the bottom surface of the main scale. The bottom surfaces of the first positioning pin and the second positioning pin are on the same plane and the bottom surfaces of the two form a measurement reference surface.

6. The bridge housing inspection fixture according to claim 5, characterized in that: The main ruler extends along the axial direction of the bridge housing, the first positioning pin extends along the radial direction of the bridge housing and the bottom surfaces at both ends thereof protrude downward to form a reference portion, the two reference portions are at the same height and are distributed circumferentially with the first positioning pin along the main reduction surface of the bridge housing.

7. The bridge housing inspection fixture according to claim 1, characterized in that: There are a plurality of positioning holes, and the plurality of positioning holes are evenly distributed along the length direction of the main ruler.

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