Differential housing boss excircle diameter detection tool

Abstract

The utility model discloses a differential housing boss excircle diameter detection tool, which is characterized by comprising a detection assembly and a standard body assembly, the detection assembly comprises an obliquely arranged inspection bench, the middle part of the inspection bench is provided with a detection port, the lower side wall of the detection port is a longitudinal positioning surface, and the top surface of the inspection bench is provided with a transverse positioning block. A dial indicator is arranged at the end part of the higher side of the inspection bench; a measuring head of the dial indicator extends into the detection opening through a lengthened measuring rod; the standard body assembly comprises a standard fixing seat, a standard aligning body and a handle, the standard aligning body is coaxially arranged at the bottom of the standard fixing seat, the outer circle size of the standard fixing seat is consistent with the standard outer circle size of a differential shell flange plate, and the maximum outer circle size of the standard aligning body is consistent with the standard outer circle size of a differential shell boss; the handle is arranged on the top face of the standard fixing base. The device has the advantages that the structure is simple, clamping is convenient, extra pressing force does not need to be applied, rapid detection of the differential shell can be achieved, and the detection result is accurate and reliable.

Description

Technical Field

[0001] This utility model relates to the field of inspection tools, specifically to a tooling for detecting the outer diameter of a differential housing boss. Background Technology

[0002] A car differential is a mechanism that allows the left and right (or front and rear) drive wheels to rotate at different speeds. It mainly consists of left and right half-shaft gears, two planetary gears, and a gear carrier. Its function is to ensure that the left and right wheels roll at different speeds when the car is turning or driving on uneven surfaces, thus guaranteeing pure rolling motion for both drive wheels. (The differential is designed to adjust the speed difference between the left and right wheels.) In four-wheel drive, all four wheels must be connected to drive them. If the four wheels are mechanically connected, the car will not rotate at the same speed when driving on curves. To ensure that the rotational speed is relatively consistent when the car is driving on curves, a center differential is needed to adjust the speed difference between the front and rear wheels.

[0003] A typical differential consists of a differential housing, planetary gears, and half-shaft gears. The differential housing is mainly formed by casting and then machining. The differential housing has a flange for installation and connection. To ensure accurate positioning of the differential housing during installation, a boss is usually set on the flange end face of the differential housing for positioning. Therefore, the dimensional accuracy requirements of the boss are high. Since the boss itself has a small protrusion height, it is inconvenient to inspect the dimensions after machining. Therefore, it is necessary to design a gauge that can quickly inspect the dimensions. Summary of the Invention

[0004] To address the shortcomings of the existing technology, this utility model provides a tooling for detecting the outer diameter of the differential housing boss. It has a simple structure and can quickly detect the outer diameter of the differential housing boss.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] A fixture for detecting the outer diameter of a differential housing boss, characterized by: a detection component and a standard body component, wherein the detection component includes an inclined inspection table with a detection port in the middle, the lower sidewall of the detection port being a longitudinal positioning surface, a transverse positioning block being provided on the top surface of the inspection table, and a dial indicator being provided at the higher end of the inspection table, the probe of the dial indicator extending into the detection port via an extended probe; the standard body component includes a standard mounting base, a calibration body, and a handle, wherein the calibration body is coaxially disposed at the bottom of the standard mounting base, the outer diameter of the standard mounting base is consistent with the standard outer diameter of the differential housing flange, the maximum outer diameter of the calibration body is consistent with the standard outer diameter of the differential housing boss, and the handle is disposed on the top surface of the standard mounting base.

[0007] Furthermore, the bottom surface of the inspection table is provided with a first support plate and a second support plate, the height of the first support plate is less than the height of the second support plate, and the bottom surfaces of the first support plate and the second support plate are inclined and coplanar.

[0008] Furthermore, the detection port is rectangular, the longitudinal positioning surface is perpendicular to the positioning surface of the transverse positioning block, the axis of the extended measuring rod is perpendicular to the longitudinal positioning surface, and the axis of the extended measuring rod is perpendicular to and intersects with the axis of the benchmark body.

[0009] Furthermore, the higher end of the inspection table has a mounting hole, in which a copper sleeve and a locking sleeve are installed. The extended measuring rod is slidably disposed in the copper sleeve, and the dial indicator is fixed on the locking sleeve. The dial indicator probe is in contact with the end face of the extended measuring rod.

[0010] Furthermore, the extended measuring rod has a stepped shaft at its upper end, and a spring is sleeved on the stepped shaft, with the upper end of the spring contacting and limiting the locking sleeve.

[0011] Furthermore, the top surface of the inspection table is provided with a plurality of first hard alloy pads supporting the end face of the differential housing flange, and second hard alloy pads are embedded on the longitudinal positioning surface and the positioning end face of the transverse positioning block.

[0012] The advantages of this utility model include: simple structure, convenient clamping, no need for additional clamping force, and the ability to quickly test the differential housing with accurate and reliable test results. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the structure of this utility model;

[0014] Figure 2 This is a schematic diagram of the standard body component structure of this utility model;

[0015] Figure 3 This is a cross-sectional structural diagram of the present invention. Detailed Implementation

[0016] The present invention will be further described in detail below with reference to specific embodiments and accompanying drawings.

[0017] One such Figure 1-3The differential housing boss outer diameter inspection fixture shown includes an inspection component and a standard body component. The inspection component includes an inclined inspection table 1 with an inspection port 2 in the middle. The lower side wall of the inspection port 2 is a longitudinal positioning surface. A transverse positioning block 3 is provided on the top surface of the inspection table 1. A dial indicator 4 is provided on the higher end of the inspection table 1, and the probe of the dial indicator 4 extends into the inspection port 2 through an extended probe 5. The standard body component includes a standard mounting base 6, a calibration body 7, and a handle 8. The calibration body 7 is coaxially mounted on the bottom of the standard mounting base 6. The outer diameter of the standard mounting base 6 is consistent with the standard outer diameter of the differential housing flange. The maximum outer diameter of the calibration body 7 is consistent with the standard outer diameter of the differential housing boss. The handle 8 is located on the top surface of the standard mounting base 6.

[0018] To make the inspection table 1 tilted, a first support plate 10 and a second support plate 11 are provided on the bottom surface of the inspection table 1. The height of the first support plate 10 is less than the height of the second support plate 11. The bottom surfaces of the first support plate 10 and the second support plate 11 are inclined and coplanar. When in use, the first support plate 10 and the second support plate 11 are placed on the same plane, so that the inspection table 1 tilts.

[0019] To facilitate detection and positioning, the detection port 2 is rectangular, with its longitudinal positioning surface perpendicular to the positioning surface of the transverse positioning block 3, used for longitudinal and transverse positioning of the differential housing, respectively. The axis of the extended measuring rod 5 is perpendicular to the longitudinal positioning surface to ensure accurate measurement position. The axis of the extended measuring rod 5 is perpendicular to and intersects with the axis of the calibration body 7, thus ensuring that the dial indicator 4 measures the diameter.

[0020] The higher end of the inspection table 1 has a mounting hole, in which a copper sleeve 9 and a locking sleeve 12 are installed. The extended measuring rod 5 is slidably disposed within the copper sleeve 9, and a dial indicator 4 is fixed on the locking sleeve 12. The probe of the dial indicator 4 contacts the end face of the extended measuring rod 5. To enable the extended measuring rod 5 to automatically reset, the upper end of the extended measuring rod 5 has a stepped shaft, on which a spring 13 is sleeved. The upper end of the spring 13 contacts and limits the movement of the locking sleeve 12.

[0021] To increase the wear resistance of the inspection tool and thus ensure reliable accuracy during long-term use, the inspection table 1 in this embodiment is provided with a number of first hard alloy pads 14 supporting the end face of the differential housing flange, and a second hard alloy pad 15 is embedded on the longitudinal positioning surface.

[0022] The method of use in this embodiment is as follows: Place the testing component on a flat surface, and then place the standard component into the testing port 2, so that one side of the standard fixing seat 6 is in close contact with the transverse positioning block 3, and the benchmark body 7 automatically adheres to the longitudinal positioning surface due to gravity. At this time, the front end of the extended measuring rod 5 abuts against the edge of the largest outer circle of the benchmark body 7, which is used to zero the dial indicator, thereby determining the standard size to be measured. Then remove the standard component, and place the differential housing to be tested into the testing port, again with one side in close contact with the transverse positioning block 3 and the lower end automatically adhering to the longitudinal positioning surface. Then observe the state of the dial indicator needle. If the needle points to zero, it indicates that the size is standard; if it is greater than zero, it indicates an upper deviation in size; and if it is less than zero, it indicates a lower deviation in size.

[0023] The technical solutions provided by the embodiments of this utility model have been described in detail above. Specific examples have been used to illustrate the principles and implementation methods of the embodiments of this utility model. The description of the above embodiments is only for helping to understand the principles of the embodiments of this utility model. At the same time, for those skilled in the art, there will be changes in the specific implementation methods and application scope based on the embodiments of this utility model. Therefore, the content of this specification should not be construed as a limitation of this utility model.

Claims

1. A fixture for detecting the outer diameter of a differential housing boss, characterized in that: The test assembly includes a test bench (1) arranged at an angle, a test port (2) in the middle of the test bench (1), a longitudinal positioning surface on the lower side wall of the test port (2), a transverse positioning block (3) on the top surface of the test bench (1), a dial indicator (4) on the higher side end of the test bench (1), and the probe of the dial indicator (4) extending into the test port (2) through an extended probe (5); the standard assembly includes a standard mounting base (6), a calibration body (7), and a handle (8), wherein the calibration body (7) is coaxially disposed at the bottom of the standard mounting base (6), the outer diameter of the standard mounting base (6) is consistent with the outer diameter standard diameter of the differential housing flange, the maximum outer diameter of the calibration body (7) is consistent with the outer diameter standard diameter of the differential housing boss, and the handle (8) is disposed on the top surface of the standard mounting base (6).

2. The differential housing boss outer diameter detection fixture according to claim 1, characterized in that: The bottom surface of the inspection table (1) is provided with a first support plate (10) and a second support plate (11). The height of the first support plate (10) is less than the height of the second support plate (11). The bottom surfaces of the first support plate (10) and the second support plate (11) are inclined planes and coplanar.

3. The differential housing boss outer diameter detection fixture according to claim 1, characterized in that: The detection port (2) is rectangular, the longitudinal positioning surface is perpendicular to the positioning surface of the transverse positioning block (3), the axis of the extended measuring rod (5) is perpendicular to the longitudinal positioning surface, and the axis of the extended measuring rod (5) is perpendicular to and intersects the axis of the benchmark body (7).

4. The differential housing boss outer diameter detection fixture according to claim 1, characterized in that: The inspection table (1) has a mounting hole on the higher side. A copper sleeve (9) and a locking sleeve (12) are installed in the mounting hole. The extended measuring rod (5) is slidably installed in the copper sleeve (9). The dial indicator (4) is fixed on the locking sleeve (12). The probe of the dial indicator (4) is in contact with the end face of the extended measuring rod (5).

5. The differential housing boss outer diameter detection fixture according to claim 4, characterized in that: The extended measuring rod (5) has a stepped shaft at its upper end, and a spring (13) is sleeved on the stepped shaft. The upper end of the spring (13) contacts and limits the locking sleeve (12).

6. The differential housing boss outer diameter detection fixture according to claim 1, characterized in that: The top surface of the inspection table (1) is provided with a plurality of first hard alloy pads (14) supporting the end face of the differential housing flange, and the end face of the longitudinal positioning surface and the transverse positioning block (3) are both embedded with second hard alloy pads (15).

Images