Differential housing outer diameter measuring device

Abstract

The utility model discloses a differential housing outer diameter measuring device comprising a pedestal, a first V-shaped seat and a second V-shaped seat are fixed on the surface of the pedestal, the first V-shaped seat and the second V-shaped seat are used for supporting two end shaft heads of a to-be-measured member, the rear side of the first V-shaped seat and the rear side of the second V-shaped seat are respectively provided with a first vertical seat and a second vertical seat, and the first vertical seat and the second vertical seat are used for supporting the to-be-measured member. A first dial indicator and a second dial indicator are respectively mounted on the first vertical seat and the second vertical seat, measuring heads of the first dial indicator and the second dial indicator respectively face the notches of the first V-shaped seat and the second V-shaped seat, a third vertical seat is arranged at the rear part of the gap between the first vertical seat and the second vertical seat, a third dial indicator is arranged on the third vertical seat, and a second dial indicator is arranged on the third vertical seat. And a measuring head of the third dial indicator faces a to-be-measured part of the axial middle part of the to-be-measured piece. The technical problems of large accumulative error, relatively high requirement on an operator and low measuring efficiency in the prior art are solved.

Description

Technical Field

[0001] The utility model belongs to the technical field of measuring devices, and in particular relates to a differential housing outer diameter measuring device. Background Art

[0002] The differential is a machine that produces a speed difference. Its two output shafts can move at different speeds, but the output torque of the two shafts must be strictly kept the same. The differential on the car has a very important influence on the car's traction, stability, and passability. Therefore, during the manufacturing process, the dimensional accuracy and processing accuracy of the differential case are very high, so its outer diameter size needs to be tested.

[0003] The existing detection method usually uses a micrometer or a coordinate measuring machine (CMM) to measure the outer diameter, but this detection method has some shortcomings: 1. When using a micrometer to measure the outer diameter, there will be a cumulative error, and the larger the outer diameter, the greater the cumulative error; 2. The measurement process of using a micrometer is relatively cumbersome; 3. When using a micrometer to measure, the differential housing is directly placed on the test table, and the differential housing cannot be effectively supported, which requires a high level of measurement skills from the operator. Using CMM for measurement, the measurement time is long and the work efficiency is low.

[0004] This application is specially proposed to address the problems that placing the differential housing directly on the test bench will cause the differential housing to lack effective support, which will affect the measurement results; there are many outer diameter positions of the differential housing to be measured, the measurement speed is slow and cannot adapt to mass production in the workshop; and the measurement error is large when measuring manually using a micrometer. Utility Model Content

[0005] The utility model aims to provide a differential case outer diameter measuring device to solve the technical problems of large cumulative error, high requirements on operators and low measuring efficiency in the above-mentioned prior art.

[0006] The technical solution adopted by the utility model to solve its technical problems is:

[0007] A differential case outer diameter measuring device comprises: a base, a first V-shaped seat and a second V-shaped seat are fixed on the surface of the base, the first V-shaped seat and the second V-shaped seat are used to support the two end shaft heads of the workpiece to be measured, the rear sides of the first V-shaped seat and the second V-shaped seat are respectively provided with a first vertical seat and a second vertical seat, the first vertical seat and the second vertical seat are respectively installed with a first micrometer and a second micrometer, the probes of the first micrometer and the second micrometer are respectively directed toward the notches of the first V-shaped seat and the second V-shaped seat, a third vertical seat is provided at the rear of the gap between the first vertical seat and the second vertical seat, a third micrometer is arranged on the third vertical seat, and the probe of the third micrometer is directed toward the measured part in the axial middle part of the workpiece to be measured.

[0008] The utility model discloses a differential housing outer diameter measuring device, wherein the first stand and the second stand are respectively provided with an inclined first micrometer mounting seat and a second micrometer mounting seat on the upper part, the first micrometer mounting seat is parallel to a side farther from an opening of the first V-shaped seat, and the second micrometer mounting seat is parallel to a side farther from an opening of the second V-shaped seat.

[0009] The utility model provides a differential case outer diameter measuring device, wherein the opening angles of the first V-shaped seat and the second V-shaped seat are 45 degrees.

[0010] The utility model discloses a differential housing outer diameter measuring device, wherein the probes of the first micrometer, the second micrometer and the third micrometer are all flat probes, and the planes where the flat probes of the first micrometer and the second micrometer are located are parallel to the opening surfaces of the corresponding first V-shaped seat and the second V-shaped seat.

[0011] The utility model provides a differential housing outer diameter measuring device. The surfaces of the openings of the first V-shaped seat and the second V-shaped seat are provided with alloy inserts. The highest surface of the alloy inserts is flush with the highest surfaces of the first V-shaped seat and the second V-shaped seat.

[0012] The utility model provides a differential case outer diameter measuring device, wherein the first micrometer, the second micrometer and the third micrometer are all installed by being pressed and fixed by knurled screws.

[0013] The utility model provides a differential housing outer diameter measuring device, wherein a base surface between the first V-shaped seat and the second V-shaped seat is provided with a pre-positioning block.

[0014] The utility model provides a differential case outer diameter measuring device. A locating block is provided on the base surface between the pre-locating block and the second V-shaped seat.

[0015] The utility model provides a differential case outer diameter measuring device, wherein the second stand is provided with a limiting column on the side facing the first stand.

[0016] The utility model provides a differential case outer diameter measuring device, wherein four corners of the bottom of the base are provided with supporting feet.

[0017] The beneficial effects of the utility model are as follows: a differential case outer diameter measuring device is proposed, and by placing the workpiece on a V-shaped seat, the workpiece to be measured can quickly find the measuring position, thereby solving the problem that the differential case cannot be effectively supported and will affect the measuring result, and the measuring position is accurate; by arranging multiple micrometers, multiple positions can be measured simultaneously, thereby greatly improving the accuracy of the measuring result and reducing the requirement on the operator's measuring skill level; by placing a calibration piece in the device and setting several micrometers to zero; and then placing the workpiece to be measured, the indicated value of the micrometer and the actual measured value of the calibration piece are converted, and the actual value of the outer diameter of the differential case can be obtained, thereby reducing the cumulative measurement error and facilitating the operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The present invention will be further described below with reference to the accompanying drawings and embodiments, in which:

[0019] Figure 1 It is a schematic diagram of an embodiment of the utility model;

[0020] Figure 2 This is a schematic diagram of measuring a standard part in an embodiment of the utility model;

[0021] Figure 3 This is a schematic diagram of measuring a workpiece to be tested according to an embodiment of the utility model;

[0022] Figure 4 It is a front view of an embodiment of the utility model;

[0023] Figure 5 It is a partial cross-sectional view of an embodiment of the utility model. DETAILED DESCRIPTION

[0024] In order to make the purpose, technical scheme and advantages of the embodiment of the utility model clearer, the technical scheme in the embodiment of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiment of the utility model. Obviously, the described embodiment is a part of the embodiment of the utility model, not all of the embodiments. It should be understood that the specific embodiments described herein are only used to explain the utility model and are not used to limit the utility model. 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.

[0025] like Figure 1-5As shown, a differential case outer diameter measuring device comprises: a base 1, a first V-shaped seat 5 and a second V-shaped seat 6 are fixed on the surface of the base 1, the first V-shaped seat 5 and the second V-shaped seat 6 are used to support the two end shaft heads of the workpiece 16 to be measured, the first V-shaped seat 5 and the second V-shaped seat 6 have a first stand seat 2 and a second stand seat 4 at the rear side respectively, the first stand seat 2 and the second stand seat 4 are respectively installed with a first micrometer 8 and a second micrometer 10, the probes of the first micrometer 8 and the second micrometer 10 are respectively facing the notches of the first V-shaped seat 5 and the second V-shaped seat 6, a third stand seat 3 is provided at the rear of the gap between the first stand seat 2 and the second stand seat 4, a third micrometer 11 is arranged on the third stand seat 3, the probe of the third micrometer 11 is facing the to-be-measured part in the axial middle part of the workpiece 16 to be measured, wherein the structure of the measuring device is adapted to the shape of the workpiece 16 to be measured, but is used for supporting and fixing, so as to facilitate the simultaneous measurement of the outer diameters of multiple parts.

[0026] As a preferred embodiment, the first stand 2 and the second stand 4 have inclined first micrometer mounting seat 7 and second micrometer mounting seat 9 on their upper parts respectively, the first micrometer mounting seat 7 is parallel to the farther side of the opening of the first V-shaped seat 5, and the second micrometer mounting seat 9 is parallel to the farther side of the opening of the second V-shaped seat 6, so that the main body of the first stand 2 and the second stand 4 is a vertical structure, and the micrometer mounting position on the top thereof is inclined, so that the measurement of the micrometer can be more accurate.

[0027] As a preferred embodiment, the opening angle of the first V-shaped seat 5 and the second V-shaped seat 6 is 45 degrees. Such a structure provides more stable support for the workpiece to be tested 16 and is easy to produce and process.

[0028] As a preferred embodiment, the probes of the first micrometer 8, the second micrometer 10 and the third micrometer 11 are all flat probes. The planes where the flat probes of the first micrometer 8 and the second micrometer 10 are located are parallel to the opening surfaces of the corresponding first V-shaped seat 5 and the second V-shaped seat 6. Since the front end of the flat probe is a small end face, it can be ensured that after the workpiece 16 to be measured is placed, the probe plane can always contact the highest point of the outer diameter of the workpiece 16 to be measured, and the supporting point of the workpiece 16 to be measured is in a line with the measured point.

[0029] As a preferred embodiment, an alloy insert 17 is provided on the opening surface of the first V-shaped seat 5 and the second V-shaped seat 6, and the highest surface of the alloy insert 17 is flush with the highest surface of the first V-shaped seat 5 and the second V-shaped seat 6. Such a setting can improve the wear resistance of the V-shaped seat and prevent the measurement accuracy from being affected by wear.

[0030] As a preferred embodiment, the first micrometer 8, the second micrometer 10 and the third micrometer 11 are all fixed by compression through knurled screws, which can facilitate the installation and fixation of the micrometers, and the detachable structure also facilitates the replacement of the micrometers.

[0031] As a preferred embodiment, the surface of the base 1 between the first V-shaped seat 5 and the second V-shaped seat 6 has a pre-positioning block 12, so that the piece to be tested 16 can be roughly positioned when it is installed into the device to prevent misidentification or reverse installation.

[0032] As a preferred embodiment, a positioning block 13 is provided on the surface of the base 1 between the pre-positioning block 12 and the second V-shaped seat 6, and the workpiece to be tested 16 is axially positioned through this structure.

[0033] As a preferred embodiment, a limiting column 18 is provided on the side of the second stand 4 facing the first stand 2 , and the calibration piece 15 can be axially positioned through this structure.

[0034] As a preferred embodiment, the four corners of the bottom of the base 1 are provided with supporting feet 14 , so that the entire device can be installed stably by adjusting the height of the supporting feet 14 .

[0035] The method of use is briefly described as follows: after the entire device is installed, the calibration piece 15 is placed in, and then each dial gauge is adjusted to zero, and then the test piece 16 is placed in to convert the indication of the dial gauge and the actual measured value of the calibration piece 15 to obtain the actual value of the outer diameter of the differential housing.

[0036] In the description of the present invention, it should be noted that the terms "center", "longitudinal", "lateral", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate positions or positional relationships based on the positions 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 cannot be understood as a limitation on the present invention. In addition, the terms "first" and "second" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance.

[0037] In the description of the present utility model, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances. In addition, in the description of the present utility model, unless otherwise specified, "plurality" means two or more.

[0038] It should be understood that those skilled in the art can make improvements or changes based on the above description, and all these improvements and changes should fall within the scope of protection of the claims attached to the utility model.

Claims

1. A differential case outer diameter measuring device, characterized in that: include: A base (1), wherein a first V-shaped seat (5) and a second V-shaped seat (6) are fixed on the surface of the base (1), the first V-shaped seat (5) and the second V-shaped seat (6) are used to support the two end shaft heads of the workpiece (16) to be measured, the first V-shaped seat (5) and the second V-shaped seat (6) are provided with a first vertical seat (2) and a second vertical seat (4) at the rear side respectively, the first vertical seat (2) and the second vertical seat (4) are provided with a first micrometer (8) and a second micrometer (10) respectively, the probes of the first micrometer (8) and the second micrometer (10) are respectively directed towards the notches of the first V-shaped seat (5) and the second V-shaped seat (6), the third vertical seat (3) is provided with a third micrometer (11), the probe of the third micrometer (11) is directed towards the to-be-measured position in the axial middle of the workpiece (16) to be measured.

2. A differential case outer diameter measuring device according to claim 1, characterized in that: The first stand (2) and the second stand (4) have an inclined first dial gauge mounting seat (7) and a second dial gauge mounting seat (9) at their upper parts, respectively; the first dial gauge mounting seat (7) is parallel to a side farther from the opening of the first V-shaped seat (5), and the second dial gauge mounting seat (9) is parallel to a side farther from the opening of the second V-shaped seat (6).

3. A differential case outer diameter measuring device according to claim 2, characterized in that: The opening angles of the first V-shaped seat (5) and the second V-shaped seat (6) are 45 degrees.

4. A differential case outer diameter measuring device according to claim 3, characterized in that: The probes of the first micrometer (8), the second micrometer (10) and the third micrometer (11) are all flat probes, and the planes on which the flat probes of the first micrometer (8) and the second micrometer (10) are located are parallel to the opening surfaces of the corresponding first V-shaped seat (5) and the second V-shaped seat (6).

5. The differential case outer diameter measuring device according to claim 3, characterized in that: Alloy inserts (17) are provided on the surfaces of the openings of the first V-shaped seat (5) and the second V-shaped seat (6), and the highest surfaces of the alloy inserts (17) are flush with the highest surfaces of the first V-shaped seat (5) and the second V-shaped seat (6).

6. The differential case outer diameter measuring device according to claim 1, characterized in that: The first micrometer (8), the second micrometer (10) and the third micrometer (11) are all installed by being pressed and fixed by knurled screws.

7. The differential case outer diameter measuring device according to claim 1, characterized in that: The surface of the base (1) between the first V-shaped seat (5) and the second V-shaped seat (6) is provided with a pre-positioning block (12).

8. The differential case outer diameter measuring device according to claim 7, characterized in that: A positioning block (13) is provided on the surface of the base (1) between the pre-positioning block (12) and the second V-shaped seat (6).

9. The differential case outer diameter measuring device according to claim 8, characterized in that: A limiting column (18) is provided on the side of the second stand (4) facing the first stand (2).

10. The differential case outer diameter measuring device according to claim 1, characterized in that: The four bottom corners of the base (1) are provided with supporting feet (14).

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