Differential cover plate measuring tool

Abstract

The utility model relates to the technical field of measuring devices, in particular to a differential cover plate measuring tool. The measuring tool comprises a base, and a rotary positioning shaft and an indicating measuring tool which are arranged on the base, wherein the differential cover plate is arranged on the rotary positioning shaft through a fixing piece; a supporting structure is installed on the base, the indicating type measuring tool is installed on the top face of the supporting structure, and a measuring head of the indicating type measuring tool extends upwards. According to the utility model, the rotary positioning shaft and the indicating measuring tool are arranged on the base, the differential cover plate is fixedly arranged on the rotary positioning shaft so as to rotate the differential cover plate, and the distance from the end face of the bearing chamber of the differential cover plate to the mounting surface can be measured in all directions through the indicating measuring tool, so that whether the distance meets the requirement or not is judged; the device is simple in structure and convenient to operate, and effectively solves the technical problem of long time consumption of a mechanical measurement method for measuring the distance from the differential cover plate bearing chamber end surface to the mounting surface in the prior art.

Description

TECHNICAL FIELD

[0001] The utility model relates to measuring device technical field especially relates to a differential mechanism cover plate measuring frock. BACKGROUND

[0002] The differential mechanism is an important component in the automobile transmission system, and the rotational speed difference is realized through the planetary gear set, wherein the center gear is used for receiving the power from the transmission shaft, the planetary gear rotates around the center gear, and is engaged with the half shaft gears on both sides, and the half shaft gears are directly connected with the left and right wheels, when the vehicle travels in a straight line, the resistance of the wheels on both sides is the same, the planetary gear only revolves with the shell, and the rotational speed of the left and right half shafts is consistent, when the vehicle turns, the resistance of the inner wheels increases, the resistance of the outer wheels decreases, the planetary gear revolves and rotates at the same time, more power is transmitted to the outer wheels, the rotational speed difference is realized, and thus the vehicle travels stably and efficiently.

[0003] The differential mechanism cover plate is one of the important components of the differential mechanism, and its main function is to seal and protect the internal structure (such as bearings, gear sets, etc.) of the differential mechanism, and at the same time, it bears the installation support function of the bearing chamber. The differential mechanism cover plate provides a stable installation surface for the tapered roller bearing through the high-precision machined bearing chamber, ensures the reliability of the bearing axial positioning and load transmission, and at the same time, the close fit of the sealing surface and the shell can effectively prevent the leakage of lubricating oil and the invasion of external pollutants. The differential mechanism cover plate is usually made of cast iron (wear-resistant) or aluminum alloy (lightweight), and the flatness and bolt hole precision directly affect the differential mechanism assembly quality, sealing performance and transmission stability, therefore, it is necessary to quickly and accurately measure the distance from the bearing chamber end face to the installation surface of the differential mechanism cover plate, so as to ensure that the size, shape and position degree of the geometric parameters meet the design requirements.

[0004] At present, the measurement of the differential mechanism cover plate usually includes mechanical measurement method, three-coordinate measurement method and optical measurement method. Among them, the mechanical measurement method needs to fix the differential mechanism cover plate on the detection platform first, and then use the height gauge or depth micrometer to measure the distance from the installation surface reference point to the bearing chamber end face vertically, which needs to change the position of the height gauge or depth micrometer many times, and adjust after each change of position, so as to measure each position of the differential mechanism cover plate, which takes a long time. Although the three-coordinate measurement method and the optical measurement method have high automation degree, the price of the measurement equipment is expensive, which greatly increases the measurement cost and reduces the economic benefit of enterprises. UTILITY MODEL CONTENTS

[0005] The utility model provides a differential mechanism cover plate measuring frock to solve the technical problem of long time consumption of the mechanical measurement method in the prior art for measuring the distance from the bearing chamber end face to the installation surface of the differential mechanism cover plate.

[0006] In order to solve the above problems, the differential mechanism cover plate measuring frock provided by the utility model adopts the following technical scheme:

[0007] A differential cover plate measuring tool comprises a base and a rotary positioning shaft and an indicating gauge mounted on the base, and the differential cover plate is mounted on the rotary positioning shaft through a fixing member.

[0008] A supporting structure is mounted on the base, and the indicating gauge is mounted on the top surface of the supporting structure, and the measuring head extends upward.

[0009] The differential cover plate measuring tool has the following advantages:

[0010] 1. The rotary positioning shaft is mounted on the base, which can provide positioning for the installation of the differential cover plate and facilitate the rotation of the differential cover plate. The indicating gauge with the measuring head extending upward is mounted on the base. During use, the differential cover plate is mounted on the rotary positioning shaft, the bearing chamber end surface of the differential cover plate is in contact with the top surface of the rotary positioning shaft, and the installation surface of the differential cover plate is in contact with the top surface of the measuring head, which will cause the indicating gauge to show a number. The distance from the bearing chamber end surface of the differential cover plate to the installation surface can be measured through the number shown by the indicating gauge, so that it can be determined whether the distance meets the requirements.

[0011] 2. During the installation process, the rotary positioning shaft is rotated, which can make different positions of the installation surface of the differential cover plate in contact with the measuring head, so as to measure the distance between each position of the installation surface of the differential cover plate and the bearing chamber end surface. The differential cover plate does not need to be repeatedly disassembled and assembled, which greatly improves the measurement efficiency of the distance from the bearing chamber end surface of the differential cover plate to the installation surface and shortens the measurement time.

[0012] Through the above arrangement, the technical problem of long time consumption in measuring the distance from the bearing chamber end surface of the differential cover plate to the installation surface by the mechanical measurement method in the prior art is effectively solved.

[0013] Further, the rotary positioning shaft comprises a positioning shaft mounted on the base and a rotary shaft mounted on the top surface of the positioning shaft, and the positioning shaft and the rotary shaft are coaxially arranged.

[0014] Further, the top surface of the measuring head is higher than the bottom surface of the rotary shaft.

[0015] Further, the difference in height between the top surface of the measuring head and the bottom surface of the rotary shaft is 15 mm.

[0016] Further, the height of the rotary shaft is 30 mm.

[0017] Further, the indicating gauge is a micrometer.

[0018] Further, the support structure comprises a vertical segment, and a first horizontal segment and a second horizontal segment arranged in parallel, the first horizontal segment is installed on the base, the upper end and the lower end of the vertical segment are connected with the first horizontal segment and the second horizontal segment respectively, and the indicating gauge is installed on the second horizontal segment.

[0019] Further, the rotating positioning shaft and the support structure are detachably installed on the base.

[0020] Further, the positioning member is a bolt or a screw or a positioning pin, and the rotating positioning shaft is provided with a mounting hole. BRIEF DESCRIPTION OF DRAWINGS

[0021] The above and other objects, features and advantages of the present application will become more apparent from the following detailed description read in conjunction with the accompanying drawings. In the drawings, several embodiments of the present application are illustrated by way of example and not limitation in which like reference numerals refer to similar elements throughout:

[0022] Figure 1 An application structure schematic view of the differential cover plate measuring tool provided by the present application is shown in the figure;

[0023] Figure 2 For Figure 1 A structure schematic view of the positioning shaft and the rotating shaft is shown in the figure.

[0024] BRIEF DESCRIPTION OF DRAWINGS

[0025] 1, base; 2, positioning shaft; 3, rotating shaft; 4, micrometer; 5, measuring head; 6, vertical segment; 7, first horizontal segment; 8, second horizontal segment; 9, bolt; 10, positioning member; 11, shaft seat; 12, differential cover plate. DETAILED DESCRIPTION

[0026] The principle and spirit of the present application will be explained in detail below by referring to several representative embodiments of the present application.

[0027] The embodiments of the differential cover plate measuring tool provided by the present application are as follows:

[0028] As Figure 1 and Figure 2 shown, the differential cover plate measuring tool comprises a base 1 and a rotating positioning shaft 2 and an indicating gauge installed on the base 1. Wherein, the rotating positioning shaft 2 comprises a positioning shaft 2 installed on the base 1 and a rotating shaft 3 installed on the top surface of the positioning shaft 2, the positioning shaft 2 and the rotating shaft 3 are coaxially arranged, and the differential cover plate 12 is installed on the rotating shaft 3 through a fixing member.

[0029] The following describes the installation of the positioning shaft 2 on the base 1. The positioning shaft 2 is detachably installed on the base 1. In this embodiment, the bottom of the positioning shaft 2 has a bearing seat 11, and a screw hole is provided on the outer periphery of the positioning shaft 2 on the bearing seat 11. A screw hole corresponding to the position and size of the screw hole on the bearing seat 11 is provided on the base 1. The positioning shaft 2 is detachably installed on the base 1 by a bolt 9 or screw that passes through the screw hole on the bearing seat 11 from top to bottom and is screwed downward into the screw hole on the base 1. In other embodiments, a pin hole is provided on the outer periphery of the positioning shaft 2 on the bearing seat 11, and a pin hole corresponding to the position and size of the pin hole on the base 1 is provided on the base 1. The positioning shaft 2 is detachably installed on the base 1 by a pin that passes through the pin hole on the bearing seat 11 from top to bottom and is screwed downward into the pin hole on the base 1.

[0030] The following describes the indicating gauge and its installation on the base 1. A support structure is detachably mounted on the base 1. The indicating gauge is mounted on the top surface of the support structure, with its probe 5 extending upwards. The top surface of the probe 5 is higher than the bottom surface of the rotating shaft 3. In this embodiment, the height difference between the top surface of the probe and the bottom surface of the rotating shaft 3 is 15mm, and the height of the rotating shaft 3 is 30mm. In this embodiment, the indicating gauge is a dial indicator 4; in other embodiments, the indicating gauge is a micrometer indicator.

[0031] Regarding the support structure: The support structure includes a vertical section 6 and two parallel horizontal sections 7 and 8. The first horizontal section 7 is detachably mounted on the base 1. The upper and lower ends of the vertical section 6 are connected to the left ends of the first horizontal section 7 and the second horizontal section 8, respectively. An indicating gauge is mounted on the second horizontal section 8. In this embodiment, the indicating gauge is mounted on the right end of the second horizontal section 8.

[0032] In this embodiment, the first horizontal segment 7 and the base 1 are provided with corresponding screw holes of the same size. The first horizontal segment 7 is detachably installed on the base 1 by means of bolts 9 or screws that pass through the screw holes of the first horizontal segment 7 from top to bottom and are screwed onto the base 1, thereby achieving the purpose of detachably installing the support structure on the base 1. In other embodiments, the first horizontal segment 7 and the base 1 are provided with corresponding pin holes of the same size. The first horizontal segment 7 is detachably installed on the base 1 by means of pins that pass through the pin holes of the first horizontal segment 7 from top to bottom and are screwed onto the base 1, thereby achieving the purpose of detachably installing the support structure on the base 1.

[0033] Finally, the installation of the differential cover 12 on the rotating shaft 3 is described. In this embodiment, the positioning element 10 is a bolt 9, and the rotating shaft 3 has bolt 9 holes. The differential cover 12 is fixedly installed on the rotating shaft 3 by the bolt 9 passing through the differential cover 12 and screwed into the bolt 9 holes. In other embodiments, the positioning element 10 is a screw, and correspondingly, the rotating shaft 3 has screw holes that match the screws; or the positioning element 10 is a positioning pin, and correspondingly, the rotating shaft 3 has pin holes.

[0034] It should be noted that the rotational mounting of the rotating shaft 3 on the positioning shaft 2 is a common mounting method in the prior art, and will not be described in detail here.

[0035] The working principle of the differential cover plate measuring fixture provided by this utility model is as follows: First, clean the base 1, micrometer, positioning shaft 2, rotating shaft 3 and differential cover plate 12 to prevent inaccurate measurement results due to unclean surfaces; then install the differential cover plate 12 on the rotating shaft 3; then rotate the differential cover plate 12 and use the micrometer to measure all positions on the mounting surface of the differential cover plate 12 to obtain the distance from the bearing housing end face to each position on the mounting surface, and judge whether the distance meets the requirements based on the reading of the dial indicator 4.

[0036] Based on the above description in this specification, those skilled in the art will also understand that the following terms used, such as "upper," "lower," "front," "rear," "left," "right," "width," "horizontal," "top," "bottom," "inner," and "outer," are terms indicating orientation or positional relationships based on the orientation or positional relationships shown in the accompanying drawings of this specification. They are only for the purpose of facilitating the explanation of the present invention and simplifying the description, and do not explicitly or implicitly suggest that the device or element involved must have the specific orientation, or be constructed and operated in a specific orientation. Therefore, the above-mentioned orientation or positional relationship terms should not be understood or interpreted as limitations on the present invention.

[0037] In addition, in the description of this specification, "multiple" means at least two, such as two, three or more, etc., unless otherwise expressly and specifically defined.

Claims

1. A differential cover plate measurement fixture, characterized by, The differential cover plate is installed on the rotating positioning shaft through a fixing member; A supporting structure is installed on the base, and the indicating gauge is installed on the top surface of the supporting structure with the measuring head extending upward.

2. The differential cover plate measurement fixture of claim 1, wherein, The rotating positioning shaft comprises a positioning shaft installed on the base and a rotating shaft installed on the top surface of the positioning shaft, and the positioning shaft is coaxially arranged with the rotating shaft.

3. The differential cover plate measurement fixture of claim 2, wherein, The top surface of the measuring head is higher than the bottom surface of the rotating shaft.

4. The differential cover plate measurement fixture of claim 3, wherein, The height difference between the top surface of the measuring head and the bottom surface of the rotating shaft is 15mm.

5. The differential cover plate measurement fixture of claim 4, wherein, The height of the rotating shaft is 30mm.

6. The differential cover plate measurement fixture of any one of claims 1 to 5, wherein, The indicating gauge is a micrometer.

7. The differential cover plate measurement fixture of any one of claims 1 to 5, wherein, The supporting structure comprises a vertical section and first and second horizontal sections arranged in parallel, the first horizontal section is installed on the base, the upper end and the lower end of the vertical section are connected with the first and second horizontal sections respectively, and the indicating gauge is installed on the second horizontal section.

8. The differential cover plate measurement fixture of any one of claims 1 to 5, wherein, The rotating positioning shaft and the supporting structure are detachably installed on the base.

9. The differential cover plate measurement fixture of any one of claims 1 to 5, wherein, The fixing member is a bolt, a screw or a positioning pin, and the rotating positioning shaft is provided with an installation hole.

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