Gauge for detecting distance from half axle gear to planet hole center of differential shell

Abstract

The utility model discloses a differential housing half axle gear to planet hole center distance testing fixture, which is characterized in that the testing fixture comprises a measuring seat, a mandrel and a dial indicator, the dial indicator is arranged on the measuring seat, the mandrel is used for being arranged in a planet hole of a differential housing, the rear end of the measuring seat is provided with a step shaft, and the step shaft is arranged on the measuring seat. The measuring seat is positioned in a half shaft hole of a differential shell through the step shaft, a measuring body coaxial with the half shaft hole is arranged in the measuring seat, the measuring body is axially and elastically arranged in the measuring seat, the front end face of the measuring body is in contact with the mandrel, the measuring body is provided with a conical section, and the conical section is provided with a conical surface. And a measuring head of the dial indicator is in contact with the conical section. The beneficial effects of the utility model are that the structure is simple, the operation is convenient, the rapid detection of the position dimension can be realized, the detection accuracy is high, the detection efficiency is high, and the production takt is accelerated.

Description

Technical Field

[0001] This utility model relates to the field of inspection tools, specifically to an inspection tool for the center distance from the half-shaft gear of a differential housing to the planetary bore. Background Technology

[0002] The differential housing is a component that encloses and supports the automotive differential. Its inner cavity houses planetary gears, axle gears, planetary gear shafts, and washers. The dimension between the inner cavity end face and the center of the planetary shaft directly affects the meshing accuracy and smooth operation of the axle gears and planetary gears, requiring strict dimensional control. However, due to space limitations within the differential housing cavity after machining, this dimension cannot be directly measured. Currently, only coordinate measuring machines (CMMs) can provide accurate data. However, using specialized equipment to measure the distance between the inner cavity end face and the center of the planetary shaft bore is complex, requires professional personnel, has high equipment costs, and is time-consuming, often resulting in delayed results, impacting production cycle time and increasing manufacturing costs. Summary of the Invention

[0003] To address the shortcomings of the existing technology, this utility model provides a differential housing half-shaft gear to planetary hole center distance gauge, which has a simple structure, is easy to operate, and can quickly detect whether the differential housing half-shaft gear to planetary hole center distance dimension is qualified.

[0004] To achieve the above objectives, the present invention adopts the following technical solution:

[0005] A gauge for measuring the center distance from the axle gear to the planetary bore of a differential housing, characterized in that it comprises a measuring seat, a mandrel, and a dial indicator, wherein the dial indicator is disposed on the measuring seat, the mandrel is used to be disposed within the planetary bore of the differential housing, the rear end of the measuring seat has a stepped shaft, the measuring seat is positioned within the axle bore of the differential housing via the stepped shaft, a measuring body is disposed within the measuring seat and arranged coaxially with the axle bore, the measuring body is axially elastically disposed within the measuring seat, the front end face of the measuring body contacts the mandrel, the measuring body has a tapered section, and the probe of the dial indicator contacts the tapered section.

[0006] Furthermore, the front end face of the measuring body is a vertical plane, and the front end of the measuring body is tangent to the outer circumferential surface of the mandrel.

[0007] Furthermore, the measuring body has a spring receiving cavity inside, and a spring is provided in the spring receiving cavity, with the rear end of the spring abutting against the measuring seat.

[0008] Furthermore, the measuring body has a limiting groove, and the measuring seat is provided with a limiting screw that extends into the limiting groove.

[0009] The advantages of this utility model include: simple structure, convenient operation, rapid detection of position and size, high detection accuracy, high detection efficiency, and the ability to accelerate production cycle. Attached Figure Description

[0010] Figure 1 This is a schematic diagram of the structure of this utility model;

[0011] Figure 2 This is a cross-sectional view of the present invention. Detailed Implementation

[0012] The present invention will be further described in detail below with reference to specific embodiments and accompanying drawings.

[0013] One such Figure 1-2 The differential housing half-shaft gear to planetary bore center distance gauge shown includes a measuring base 1, a spindle 2, and a dial indicator 3, wherein the dial indicator 3 is mounted on the measuring base 1. The spindle 2 is used to mount within the planetary bore of the differential housing, and the diameter of the spindle 2 matches the diameter of the planetary bore. The rear end of the measuring base 1 has a stepped shaft 4, which positions the measuring base 1 within the half-shaft bore of the differential housing. The shoulder of the stepped shaft 4 is in close contact with the inner end face of the half-shaft bore. A measuring body 5 is arranged coaxially with the half-shaft bore within the measuring base 1. The measuring body 5 is axially elastically mounted within the measuring base 1, and its front end protrudes from the measuring base 1. The front end face of the measuring body 5 contacts the spindle 2, and the front end face of the measuring body 5 is a vertical plane, tangent to the outer circumferential surface of the spindle 2. The measuring body 1 has a tapered section 6, and the probe of the dial indicator 3 contacts the tapered section 6.

[0014] like Figure 2 As shown, the measuring body 5 has a spring receiving cavity inside, and a spring 7 is installed inside the spring receiving cavity. The rear end of the spring 7 abuts against the measuring seat 1. The measuring body 5 has a limiting groove, and a limiting screw 8 that extends into the limiting groove is installed on the measuring seat 1.

[0015] In this embodiment, the gauge is first used to calibrate a standard differential housing that has passed the three-coordinate measuring machine's dimensional requirements. Specifically, the mandrel 2 is inserted into the planetary bore of the standard differential housing. The measuring body (an assembly consisting of a measuring base 1, a dial indicator 3, a measuring body 4, and a spring 7) is then positioned inside the half-shaft bore through a window on the differential housing, ensuring the front end of the measuring body 4 contacts the mandrel 2. The dial indicator is then adjusted to zero. After calibration, other differential housing measurements can be performed using the same method, except that the dial indicator does not need to be zeroed. Instead, the position of the dial indicator needle is directly observed. If the needle is to the left of zero, the size is too large; if the needle is to the right of zero, the size is too small. Further assessment is then needed to determine if the size is within the allowable error range.

[0016] 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 gauge for measuring the center distance from the axle gear to the planetary bore in a differential housing, characterized in that: The device includes a measuring base (1), a spindle (2), and a dial indicator (3). The dial indicator (3) is mounted on the measuring base (1). The spindle (2) is used to be mounted in the planetary bore of the differential housing. The rear end of the measuring base (1) has a stepped shaft (4). The measuring base (1) is positioned in the half-shaft bore of the differential housing by the stepped shaft (4). The measuring base (1) is provided with a measuring body (5) arranged coaxially with the half-shaft bore. The measuring body (5) is axially elastically mounted in the measuring base (1). The front end face of the measuring body (5) is in contact with the spindle (2). The measuring body (5) has a tapered section (6). The probe of the dial indicator (3) is in contact with the tapered section (6).

2. The differential housing half-shaft gear to planetary bore center distance gauge according to claim 1, characterized in that: The front end face of the measuring body (5) is a vertical plane, and the front end of the measuring body (5) is tangent to the outer circumferential surface of the mandrel (2).

3. A differential housing half-shaft gear to planetary bore center distance gauge according to claim 1, characterized in that: The measuring body (5) has a spring receiving cavity inside, and a spring (7) is provided in the spring receiving cavity. The rear end of the spring (7) abuts against the measuring seat (1).

4. A differential housing half-shaft gear to planetary bore center distance gauge according to claim 1, characterized in that: The measuring body (5) has a limiting groove, and the measuring seat (1) is provided with a limiting screw (8) that extends into the limiting groove.

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