Axle housing sensor support position special-purpose testing fixture

Abstract

The utility model belongs to the technical field of axle housings, and particularly relates to a special detection tool for the position of an axle housing sensor support. The detection tool comprises a positioning frame and a detection rod, the upper end of one side of the positioning frame is detachably connected with the detection rod, one side, facing the detection rod, of the positioning frame is provided with a positioning end face, the lower end face of the positioning frame is provided with a positioning semicircle, one end, away from the positioning frame, of the detection rod is provided with a semicircular block, and one side, away from the positioning frame, of the semicircular block forms a lower difference plane. The end face of the detection rod not connected with the semicircular block forms an upper difference plane, and one side of the semicircular block adjacent to the upper difference plane forms a qualified plane. The gauge does not need repeated manual alignment, is accurate in positioning, convenient and fast, does not need to read measurement data, is high in measurement efficiency, can reduce the labor intensity of workers, and improves the measurement precision.

Description

Technical Field

[0001] The utility model belongs to the technical field of axle housings, and in particular relates to a special inspection tool for the position of an axle housing sensor bracket. Background Art

[0002] In the manufacturing process of heavy-duty truck drive axle housings with special structures, press-fitting axle housing sensor brackets is an emerging processing method in recent years. The press-fitting length of the ABS seat determines the detection effect after the sensor is installed. The processing method used is mainly mold press-fitting. In order to avoid dimensional deviations caused by other factors such as cumulative errors caused by mass production, or quality problems caused by inadequate press-fitting during the process, eliminate batch defective products, and achieve the purpose of closed-loop inspection of this process, it is particularly important to use suitable special inspection tools to inspect the length of the sensor bracket.

[0003] Checking the press-fit position of the axle housing sensor bracket primarily involves measuring the distance between the end face of the shaft head and the sensor bracket. This was previously done using a depth vernier caliper. However, due to the tubular structure of the sensor bracket, the narrow tip of the depth vernier caliper resulted in poor fit between the caliper and the sensor bracket, large measurement errors, and reduced production efficiency. Given today's high-quality technical requirements, it's necessary to improve traditional inspection fixtures to reduce labor intensity and improve measurement accuracy. This will better meet the industry's demand for high-quality products and promote better business development.

[0004] The existing technology is to use a depth vernier caliper for measurement. Since the measuring reference surface and the sensor end face are not on the same axis, it is difficult to align the depth vernier caliper when measuring. Due to the structural form of the vernier caliper, the measurement error is high. In addition, the depth vernier caliper needs to read the measurement value, which reduces production efficiency. The component is processed by mold press-fitting. In principle, when the mold positioning does not cause loss or deformation, the floating difference of the press-fitting size is low. However, with the control requirements for quality stability in mass production, this processing method should be inspected at a certain frequency. This process only needs to determine whether the component processing dimensions are within the tolerance, and there is no need to read the numerical value of the processing length. In response to the above shortcomings, the utility model designs a special length gauge for the sensor bracket position. Compared with the traditional vernier caliper, this gauge has the advantages of stable structure, high measurement efficiency and low manufacturing cost. Its purpose is to reduce manual labor intensity, meet the inspection frequency requirements, achieve the purpose of closed-loop inspection, obtain greater quality value with less investment, so as to better adapt to the industry's demand for high-quality products and promote the healthy development of enterprises. Utility Model Content

[0005] The utility model proposes a special inspection tool for the position of the bridge housing sensor bracket, which solves the problems of poor fit between the caliper and the sensor bracket, large measurement error, low measurement efficiency and high labor intensity when the depth vernier caliper is used to measure the press-fit position of the bridge housing sensor bracket.

[0006] The technical solution of the present utility model is achieved as follows:

[0007] A special inspection tool for the position of a bridge housing sensor bracket includes a positioning frame and a inspection rod, wherein the upper end of one side of the positioning frame is detachably connected to the inspection rod, the positioning frame is provided with a positioning end face on the side facing the inspection rod, the lower end face of the positioning frame is provided with a positioning semicircle, the end of the inspection rod away from the positioning frame is provided with a semicircular block, the side of the semicircular block away from the positioning frame forms a lower difference plane, the end face of the inspection rod not connected to the semicircular block forms an upper difference plane, and the side of the semicircular block adjacent to the upper difference plane forms a qualified plane.

[0008] Through the above technical solution, the positioning end face and positioning semicircle in the positioning frame cooperate with the upper difference plane, lower difference plane and qualified plane set on the inspection rod, which can quickly detect whether the length of the sensor bracket is within the upper and lower tolerance range required by the process, thereby improving the detection efficiency.

[0009] Optionally, a mounting hole is installed on the side of the positioning frame, one end of the inspection rod is fixedly connected to a connecting shaft, the diameter of the connecting shaft is smaller than the diameter of the inspection rod, the connecting shaft is inserted into the mounting hole, and the connecting shaft and the mounting hole are loosely matched.

[0010] Through the above technical solution, the arrangement of the mounting hole and the connecting shaft can improve the firmness and flexibility of the connection between the inspection rod and the positioning frame.

[0011] Optionally, a clamping plane is provided on the outer side of the connecting shaft, a threaded hole is provided on the top of the positioning frame, a fixing bolt is threadedly connected in the threaded hole, and an end of the fixing bolt is pressed against the clamping plane.

[0012] Through the above technical solution, the cooperation between the pressing plane and the threaded hole and the fixing bolt improves the firmness and stability of the connecting shaft and the mounting hole after installation, and can play a restraining and fixing role when the inspection rod and the positioning frame are assembled.

[0013] Optionally, the test rod is cylindrical, the semicircular block is integrally formed with the test rod, and the upper difference plane and the lower difference plane are both semicircular.

[0014] Through the above technical solution, the upper difference plane and the lower difference plane are both semicircular, which can facilitate processing, reduce manufacturing costs, and avoid collision with the workpiece during the detection process.

[0015] Optionally, the upper end surface of the positioning frame is arc-shaped, the center of the upper end of the positioning frame is an arc-shaped protrusion, one side of the arc-shaped protrusion is provided with the mounting hole, and the top of the arc-shaped protrusion is provided with the threaded hole.

[0016] Through the above technical solution, the arc-shaped design and the arc-shaped protrusion design facilitate the installation and adaptation of the inspection rod, and can also improve the strength of the positioning frame and reduce the weight of the positioning frame.

[0017] After adopting the above technical solution, the beneficial effects of the utility model are:

[0018] The special inspection tool in the utility model can realize the rapid inspection of the qualified rate of the position of the sensor bracket of the special structure axle housing, relates to the drive axle housing used in various types of city buses, heavy trucks, etc., and relates to the field of automobile axle housing manufacturing.

[0019] The inspection fixture is simple and quick to use. It adopts the positioning method of the shaft head end face and the shaft head outer cylindrical surface. The positioning frame can make the inspection fixture fit closely with the workpiece to be inspected, reducing detection errors. There is no need for manual repeated adjustment. The positioning is accurate, convenient and fast, and there is no need to read the measurement data. The measurement efficiency is high, which can reduce manual labor intensity and improve measurement accuracy to better meet the industry's demand for high-quality products and promote better development of enterprises. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative labor.

[0021] Figure 1 2. It is a structural diagram of the inspection tool in the embodiment;

[0022] Figure 2 2 is a schematic structural diagram of the test rod in the embodiment;

[0023] Figure 3 2 is a schematic structural diagram of a positioning frame in an embodiment;

[0024] Figure 4 1 is a side view of the inspection tool detection sensor bracket in the embodiment.

[0025] Explanation of the accompanying symbols: 1. Positioning frame; 2. Inspection rod; 3. Threaded hole; 4. Positioning semicircle; 5. Positioning end face; 6. Upper difference plane; 7. Lower difference plane; 8. Connecting shaft; 9. Pressing plane; 10. Qualified plane; 11. Mounting hole; 12. Sensor bracket; 13. Workpiece; 14. Oil seal table end face. DETAILED DESCRIPTION

[0026] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0027] The embodiment of the present application discloses a special inspection tool for the position of an axle housing sensor bracket.

[0028] Example

[0029] according to Figures 1 to 4 As shown, a special inspection tool for the position of a bridge housing sensor bracket includes a positioning frame 1 and a testing rod 2. The upper end face of the positioning frame 1 is arc-shaped, and the upper end center of the positioning frame 1 is an arc-shaped protrusion. The lower end face of the positioning frame 1 is a positioning semicircle 4, and the positioning semicircle 4 is a positioning contact surface. A threaded hole 3 is provided on the top of the arc-shaped protrusion, and a mounting hole 11 is provided on the side of the arc-shaped protrusion. The front and rear sides of the positioning frame 1 are both positioning end faces 5, and the positioning end face 5 needs to be in contact with the workpiece 13 during inspection.

[0030] The test rod 2 is cylindrical, with one end in a stepped shape. The other end of the test rod 2 is fixedly connected to a connecting shaft 8, which has a diameter smaller than that of the test rod 2. A semicircular block is provided at the stepped end of the test rod 2. The semicircular block is integrally formed with the test rod 2. The side of the semicircular block away from the test rod 2 forms a lower differential plane 7, and the end face of the test rod 2 not connected to the semicircular block forms an upper differential plane 6. Both the upper differential plane 6 and the lower differential plane 7 are semicircular. The side of the semicircular block adjacent to the upper differential plane 6 forms a qualified plane 10. The upper differential plane 6, the lower differential plane 7, and the qualified plane 10 are the main principle components of the test fixture. The upper differential plane 6 and the lower differential plane 7 are set according to the limit tolerances of the drawings of the sensor bracket 12. The qualified plane 10 represents the tolerance range of the length dimension of the sensor bracket 12. That is, the upper differential plane 6 refers to the longest dimension of the sensor bracket 12, the lower differential plane 7 refers to the shortest dimension of the sensor bracket 12, and the size of the qualified plane 10 is between the upper differential plane 6 and the lower differential plane 7.

[0031] A clamping plane 9 is axially arranged on the side of the connecting shaft 8, and the connecting shaft 8 matches the mounting hole 11. The threaded hole 3 is threadedly connected with a fixing bolt, and the fixing bolt realizes the detachable connection between the connecting shaft 8 and the positioning frame 1 by pressing against the clamping plane 9. The clamping plane 9 and the connecting shaft 8 play a restraining and fixing role when the inspection rod 2 and the positioning frame 1 are assembled.

[0032] Working principle:

[0033] The inspection rod 2 is inserted into the mounting hole 11 of the positioning frame 1 through the connecting shaft 8. The connecting shaft 8 and the mounting hole 11 are clearance-matched. The fixing bolt in the threaded hole 3 is rotated and tightened against the tightening plane 9 of the connecting shaft 8, thereby fixing the position of the inspection rod 2. The installation of the inspection rod 2 and the positioning frame 1 is completed.

[0034] When a test fixture is needed to test the sensor bracket 12, the positioning semicircle 4 and the positioning end face 5 are fitted with the oil seal platform end face 14 of the shaft head of the axle housing, and the positioning frame 1 rotates along the outer circle of the shaft head to perform the testing action.

[0035] When the length of the sensor bracket 12 is qualified, the design range of the qualified plane 10 in the test rod 2 should just interfere with the end face of the sensor bracket 12. In other cases, it is unqualified.

[0036] When the sensor bracket 12 is too long, there should be no interference between the lower differential plane 7 and the sensor bracket 12 . In this case, the sensor bracket 12 is determined to be unqualified.

[0037] When the size of the sensor bracket 12 is too short, there will be interference between the upper difference plane 6 and the sensor bracket 12. In this case, the sensor bracket 12 is determined to be unqualified.

[0038] It can be seen that when using the inspection fixture of the present invention for quick inspection, the main detection principle of the inspection fixture comes from the height difference design of the upper difference plane 6 and the lower difference plane 7, which can meet the requirements of screening the press-fit length of the sensor bracket 12 that is too long or too short.

[0039] With the continuous improvement of China's automobile industry manufacturing capacity, the rational use of quick inspection tools will help improve the inspection efficiency of the automobile parts manufacturing process. Although the general inspection tools on the market have relatively mature inspection mechanisms and inspection principles, they are obviously inconvenient when measuring workpieces 13 with special shapes and sizes. In order to simplify this inspection process and improve the inspection efficiency of the process, based on the purpose of rapid inspection, improving production efficiency and reducing the labor intensity of workers, the utility model designs this length inspection tool. The utility model has wide applicability and promotion to the majority of axle manufacturers.

[0040] In the description of the present invention, it should be understood that the terms "longitudinal", "transverse", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate orientations or positional relationships based on the orientations or positional relationships 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 should not be understood as a limitation on the present invention. In the description of the present invention, unless otherwise specified and limited, it should be noted that the terms "installed", "connected" and "connected" should be understood in a broad sense, for example, it can be a mechanical connection or an electrical connection, or it can be the internal communication of two elements, it can be a direct connection, or it can be an indirect connection through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms can be understood according to the specific circumstances.

[0041] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A special inspection tool for the position of axle housing sensor bracket, characterized by: The present invention comprises a positioning frame and a testing rod, wherein the upper end of one side of the positioning frame is detachably connected to the testing rod, the positioning frame is provided with a positioning end face on the side facing the testing rod, the lower end face of the positioning frame is provided with a positioning semicircle, the end of the testing rod away from the positioning frame is provided with a semicircular block, the side of the semicircular block away from the positioning frame forms a lower difference plane, the end face of the testing rod not connected to the semicircular block forms an upper difference plane, and the side of the semicircular block adjacent to the upper difference plane forms a qualified plane.

2. The special inspection tool for the position of the axle housing sensor bracket according to claim 1, characterized in that: A mounting hole is installed on the side of the positioning frame, and one end of the inspection rod is fixedly connected to a connecting shaft. The diameter of the connecting shaft is smaller than the diameter of the inspection rod. The connecting shaft is inserted into the mounting hole and has a clearance fit with the mounting hole.

3. The special inspection tool for the position of the axle housing sensor bracket according to claim 2, characterized in that: A pressing plane is provided on the outer side of the connecting shaft, a threaded hole is provided on the top of the positioning frame, a fixing bolt is threadedly connected in the threaded hole, and an end of the fixing bolt is pressed against the pressing plane.

4. The special inspection tool for the position of the axle housing sensor bracket according to claim 1, characterized in that: The test rod is cylindrical, the semicircular block is integrally formed with the test rod, and the upper difference plane and the lower difference plane are both semicircular.

5. The special inspection tool for the position of the axle housing sensor bracket according to claim 3, characterized in that: The upper end surface of the positioning frame is arc-shaped, the center of the upper end of the positioning frame is an arc-shaped protrusion, one side of the arc-shaped protrusion is provided with the mounting hole, and the top of the arc-shaped protrusion is provided with the threaded hole.

6. The special inspection tool for the position of the axle housing sensor bracket according to claim 1, characterized in that: The positioning end surface is fitted with the workpiece to be inspected, the upper difference plane and the lower difference plane are set according to the limit tolerance of the drawing of the workpiece to be inspected, and the qualified plane is the tolerance range of the length of the workpiece to be inspected.

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