CN114001615A - Rapid detection device and detection method for automobile differential shell - Google Patents
Rapid detection device and detection method for automobile differential shell Download PDFInfo
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- CN114001615A CN114001615A CN202111327542.6A CN202111327542A CN114001615A CN 114001615 A CN114001615 A CN 114001615A CN 202111327542 A CN202111327542 A CN 202111327542A CN 114001615 A CN114001615 A CN 114001615A
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- detection
- dial indicator
- ball head
- head positioning
- differential case
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
- G01B5/00—Measuring arrangements characterised by the use of mechanical techniques
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
- G01B5/00—Measuring arrangements characterised by the use of mechanical techniques
- G01B5/24—Measuring arrangements characterised by the use of mechanical techniques for measuring angles or tapers; for testing the alignment of axes
- G01B5/25—Measuring arrangements characterised by the use of mechanical techniques for measuring angles or tapers; for testing the alignment of axes for testing the alignment of axes
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
- G01B5/00—Measuring arrangements characterised by the use of mechanical techniques
- G01B5/24—Measuring arrangements characterised by the use of mechanical techniques for measuring angles or tapers; for testing the alignment of axes
- G01B5/25—Measuring arrangements characterised by the use of mechanical techniques for measuring angles or tapers; for testing the alignment of axes for testing the alignment of axes
- G01B5/252—Measuring arrangements characterised by the use of mechanical techniques for measuring angles or tapers; for testing the alignment of axes for testing the alignment of axes for measuring eccentricity, i.e. lateral shift between two parallel axes
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- A Measuring Device Byusing Mechanical Method (AREA)
Abstract
The invention discloses a quick detection device and a detection method for an automobile differential shell, which comprise a detection tool and a calibration detection block, wherein the detection tool is provided with a ball head positioning pin, a rotating shaft and a detection ring; ball head positioning pins are uniformly distributed on the detection ring; a dial indicator fixing frame provided with a dial indicator is arranged above the ball head positioning pin, and the rotating shaft arranged in the middle of the detection ring is provided with the dial indicator. The method for detecting the automobile differential shell comprises the following steps: (1) adjusting and detecting zero position of each dial indicator by a calibration detection block for the checking tool; (2) 4 ball positioning pins of the checking fixture are placed in a cross axle groove of the differential case to complete automatic centering of the checking fixture; (3) the dial indicator on the rotary rotating shaft moves on the spherical surface at the inner side of the differential case; (4) and acquiring the difference between the reading change and the zero position of the dial indicator on the ball head positioning pin and the rotating shaft, namely detecting the change data of the position of the cross shaft slot and the position of the spherical surface. The invention can solve the problems of rapid detection of the end face, the center of the cross shaft hole, the center of the spherical surface and the like of the differential shell.
Description
Technical Field
The invention relates to the technical field of automobile manufacturing, in particular to a device and a method for quickly detecting an automobile differential shell.
Background
The automobile differential mechanism is a main part of a drive axle and has the function of allowing the half shafts on two sides to rotate at different rotating speeds while transmitting power to the half shafts on two sides, so that wheels on two sides can run in a pure rolling mode at unequal distances as far as possible, and the friction between tires and the ground is reduced.
The trajectory of the wheels of the automobile is an arc when the automobile turns left, if the automobile turns left, the center point of the arc is on the left side, and in the same time, the arc line of the right wheel is longer than that of the left wheel.
In brief, the differential mechanism functions to rotate tires at different rotational speeds when the vehicle turns, and can eliminate wheel slip caused by various factors to keep a smooth turn in a consistent manner.
On the differential case, the cross axle position is mainly that the fixed planetary gear is concentric with the axle center of the differential case, and the spherical surface on the differential is the space position of the fixed planetary gear and the half axle gear;
if the central position of the cross shaft and the end surface position deviate towards the outer side of the end surface, the meshing clearance between the planetary gear and the half shaft gear is large, and the problem of abnormal sound is caused;
if the central position of the cross shaft and the end surface position deviate towards the inner side of the end surface, the meshing clearance between the planetary gear and the half shaft gear is small, and the problem of locking can be caused;
if the central position of the spherical surface and the end surface position relatively shift towards the inner side, the meshing clearance between the planetary gear and the half axle gear is larger, and the problem of abnormal sound is generated;
if the central position of the spherical surface and the end surface position relatively shift towards the outer side, the meshing clearance between the planetary gear and the half axle gear is smaller, and the problem of locking can be generated;
in theory, the center of the cross shaft hole, the center of the end face and the center of the spherical surface of the differential case should be in the same position; however, in actual processing, due to factors such as equipment, tools and process methods, the center of the cross shaft hole, the center of the end face and the center of the spherical surface of the differential case are not in one position; how to realize effective detection on the end face, the center of the cross-shaped shaft hole and the center of the spherical surface of the differential case rapidly through a detection method of a combined detection tool, and effectively controlling the deviation of the end face, the center of the cross-shaped shaft hole and the center of the spherical surface of the differential case is a difficult problem in the industry.
Disclosure of Invention
The invention aims to solve the technical problem of providing a device and a method for quickly detecting an automobile differential case, which can quickly realize effective detection on the end surface, the center of a cross shaft hole and the center of a spherical surface of the differential case and solve the problem of quickly detecting the end surface, the center of the cross shaft hole and the center of the spherical surface of the differential case.
In order to solve the problems, the technical scheme of the invention is as follows: the quick detection device for the automobile differential case comprises a detection tool and a calibration detection block for calibrating the detection tool; the checking fixture comprises a ball head positioning pin, a rotating shaft, a dial indicator and a detecting ring; a plurality of ball positioning pins for determining the position of a cross shaft of the differential case and the center of the cross shaft hole are uniformly distributed on the detection ring; a dial indicator fixing frame for supporting and fixing a dial indicator is correspondingly arranged above each ball head positioning pin, and one end of the dial indicator fixing frame is connected with the detection ring; each dial indicator fixing frame is provided with one dial indicator for detecting an actual machining numerical value; the rotation axis sets up detect the ring intra-annular middle part, the rotation axis is rotatory around detecting the ring center, install one on the rotation axis and be used for detecting the inboard sphere of differential case the percentage table. When the dial indicator is used, the indicator head of the dial indicator fixed on the dial indicator fixing frame is abutted to the center of the top end plane of the ball head positioning pin, the ball head spherical surface of the ball head positioning pin is abutted to the differential case, and the ball head positioning pin shaft can move up and down in a certain stroke relative to the detection ring and simultaneously push the dial indicator to move.
In the above technical solution, a more specific solution is: the ball head diameter of the ball head positioning pin; the width dimension of the part cross axle slot is consistent with the width dimension of the part cross axle slot required to be detected.
The calibration detection block 1 is in an inner ring ladder shape corresponding to the detection tool and provided with a high step, a middle step and a smooth bottom surface plane, and the height difference is the theoretical difference between the sizes of the detected parts; the calibration and detection block 1 is used for verifying a pre-adjustment reference, namely a zero adjustment, which is commonly known as zero adjustment, of the detection tool.
The method for quickly detecting the automobile differential shell by adopting the quick detection device for the automobile differential shell comprises the following steps:
(1) before detection, the detection tool is placed on the calibration detection block, the bottom surface of the detection ring is flush with the high-order top surface of the calibration detection block, the spherical surfaces of the 4 ball head positioning pins are flush with the middle-order top surface of the calibration detection block, the rotating shaft rotating around the center of the detection ring is rotated, so that the dial indicator head on the rotating shaft is in contact with the inner bottom surface of the calibration detection block, and then the 5 dial indicators are respectively adjusted to a numerical value to be used as a detection zero position of the detection tool;
(2) during detection, four ball positioning pins of the detection tool are placed into a cross shaft groove of the differential case to finish automatic centering of the detection tool; simultaneously observing whether the surface of the detection ring is contacted with the end surface of the differential shell or not; observing whether the ball heads of the 4 ball head positioning pins are in contact with the bottom surface of the cross shaft groove, and adjusting the positions of the ball head positioning pins to enable the end surface of the detection ring to be flush with the end surface of the differential case and enable the ball heads of the ball head positioning pins to be in contact with the bottom surface of the cross shaft groove;
3. rotating a rotating shaft rotating around the center of the detection ring, so that the dial indicator on the rotating shaft rotating around the center of the detection ring moves for a certain distance on the spherical surface at the inner side of the differential case;
4. whether the cross shaft groove and the inner side spherical surface of the differential case meet the design requirements or not can be judged by observing the difference between the reading change and the zero position of the 4 ball head positioning pins and the dial indicator on the rotating shaft rotating around the center of the detection ring; through the change situation between the reading of each dial indicator and the zero position, the change situations of the position of the cross shaft groove and the position of the spherical surface can be quickly and clearly obtained; therefore, the processing parameters are quickly adjusted, and the production efficiency and the processing quality are effectively ensured.
Due to the adoption of the technical scheme, compared with the prior art, the invention has the following beneficial effects:
in the actual production process of the differential case parts, in order to ensure that the center of the cross shaft hole, the center of the end face and the center of the spherical surface of the differential case are positioned at the same position, production enterprises adopt various production processes, and meanwhile, whether the center of the cross shaft hole, the center of the end face and the center of the spherical surface of the differential case are positioned at the same position can be detected by using the invention, so that data guarantee is provided for producing qualified products; when the invention is used for detection, the change conditions of the position of the cross shaft groove and the spherical surface position can be quickly and clearly obtained by changing the change conditions between the reading of the dial indicator and the zero position; therefore, the processing parameters are quickly adjusted, and the production efficiency and the processing quality are effectively ensured.
Drawings
FIG. 1 is a schematic view of a differential case to be tested;
FIG. 2 is a schematic structural diagram of the rapid detection device and the calibration detection block according to the present invention;
FIG. 3 is a schematic top view of the rapid test apparatus of the present invention;
FIG. 4 is a schematic diagram of the calibration detection of the rapid detection device according to the present invention;
FIG. 5 is a schematic view of the rapid test device of the present invention in use.
The reference numbers in the figures denote: 1. calibrating a detection block; 2. A ball head positioning pin; 3. A rotating shaft; 4. a dial indicator; 5. A detection ring; 6. a dial indicator fixing frame; 7. a differential case.
Detailed Description
The invention is further illustrated with reference to the following figures and examples:
fig. 1 is a schematic view showing a structure of a differential case 7 to be tested, and the parts to be tested and the existing problems have been described in the background art and will not be described herein.
The quick detection device for the automobile differential case in the figures 2, 3 and 4 comprises a detection tool and a calibration detection block 1 for calibrating the detection tool; the detection tool comprises a ball head positioning pin 2, a rotating shaft 3, a dial indicator 4 and a detection ring 5. The detection ring 5 is uniformly distributed with a cross shaft hole center for determining the position of the cross shaft of the differential case
A dial indicator fixing frame 6 for supporting and fixing the dial indicator 4 is correspondingly arranged right above each ball head positioning pin 2, and one end of the dial indicator fixing frame 6 is connected with the detection ring 5; each dial indicator fixing frame 6 is provided with a dial indicator 4 for detecting an actual machining numerical value; when the device is used, the gauge head of the dial indicator 4 fixed on the dial indicator fixing frame 6 is abutted against the center of the plane at the top end of the ball head positioning pin 2, the ball head spherical surface of the ball head positioning pin 2 is abutted against the differential case 7, and the diameter of the ball head ball of the ball head positioning pin 2 is consistent with the width dimension of a cross axle groove of a part to be detected; the ball head positioning pin shaft 2 can move up and down in a certain stroke relative to the detection ring 5, and meanwhile, the dial indicator 4 is pushed to move; the rotating shaft 3 is arranged in the middle of the inside of the detection ring 5, the rotating shaft 3 rotates around the center of the detection ring, and the rotating shaft 3 is provided with a dial indicator 4 for detecting the spherical surface inside the differential case 7; the structure of the calibration detection block 1 is made into an inner step shape of a smooth plane corresponding to the detection tool, and the height difference is the theoretical difference between the sizes of the detected parts; the calibration and detection block 1 is used for verifying a pre-adjustment reference, namely a zero adjustment, which is commonly known as zero adjustment, of the detection tool.
The quick detection method for the automobile differential shell by adopting the quick detection device for the automobile differential shell comprises the following steps:
1. before detection, the detection tool is placed on the calibration detection block, as shown in fig. 4, the bottom surface of the detection ring 5 is flush with the high-order top surface of the calibration detection block, the spherical surfaces of the 4 ball head positioning pins are flush with the middle-order top surface of the calibration detection block, the rotating shaft rotating around the center of the detection ring is rotated, so that the dial indicator head on the rotating shaft is in contact with the inner bottom surface of the calibration detection block, and then the 5 dial indicators are respectively adjusted to a numerical value to be used as the detection zero position of the detection tool;
2. during detection, four ball positioning pins of the detection tool are placed into a cross axle groove of the differential case to complete automatic centering of the detection tool, as shown in fig. 5; simultaneously observing whether the surface of the detection ring is contacted with the end surface of the differential shell or not; observing whether the ball heads of the 4 ball head positioning pins are in contact with the bottom surface of the cross shaft groove, and adjusting the positions of the ball head positioning pins to enable the end surface of the detection ring to be flush with the end surface of the differential case and enable the ball heads of the ball head positioning pins to be in contact with the bottom surface of the cross shaft groove;
3. rotating a rotating shaft rotating around the center of the detection ring, so that the dial indicator on the rotating shaft rotating around the center of the detection ring moves for a certain distance on the spherical surface at the inner side of the differential case;
4. whether the cross shaft groove and the inner side spherical surface of the differential case meet the design requirements or not can be judged by observing the difference between the reading change and the zero position of the 4 ball head positioning pins and the dial indicator on the rotating shaft rotating around the center of the detection ring; through the change situation between the reading of each dial indicator and the zero position, the change situations of the position of the cross shaft groove and the position of the spherical surface can be quickly and clearly obtained; therefore, the processing parameters are quickly adjusted, and the production efficiency and the processing quality are effectively ensured.
Claims (4)
1. The utility model provides a quick detection device of car differential shell which characterized in that: the device comprises a detection tool and a calibration detection block for calibrating the detection tool; the checking fixture comprises a ball head positioning pin, a rotating shaft, a dial indicator and a detecting ring; a plurality of ball head positioning pins are uniformly distributed on the detection ring; a dial indicator fixing frame is correspondingly arranged above each ball head positioning pin, and one end of each dial indicator fixing frame is connected with the detection ring; each dial indicator fixing frame is provided with one dial indicator; the rotary shaft is arranged in the middle of the inside of the detection ring, and the dial indicator is installed on the rotary shaft.
2. The differential case rapid detection device for the automobile according to claim 1, characterized in that: the ball head diameter of the ball head positioning pin is consistent with the width of the cross shaft groove of the part to be detected.
3. The differential case rapid detection device for an automobile according to claim 1 or 2, characterized in that: the calibration detection block is in an inner ring ladder shape corresponding to the detection tool and provided with high, middle and bottom surface smooth planes.
4. A differential case rapid-inspection method for an automobile according to claims 1-3, characterized by comprising the steps of:
(1) before detection, the detection tool is placed on the calibration detection block, and then 5 dial indicators are respectively adjusted to a numerical value to be used as a detection zero position of the detection tool;
(2) during detection, the four ball positioning pins of the detection tool are placed into a cross shaft groove of the differential case to finish automatic centering of the detection tool; simultaneously observing whether the surface of the detection ring is in contact with the end face of the differential case; observing whether the ball heads of the four ball head positioning pins are in contact with the bottom surface of the cross shaft groove, and adjusting the positions of the ball head positioning pins to enable the end surface of the detection ring to be flush with the end surface of the differential case and enable the ball heads of the ball head positioning pins to be in contact with the bottom surface of the cross shaft groove;
(3) rotating the rotating shaft rotating around the center of the detection ring, so that the dial indicator on the rotating shaft rotating around the center of the detection ring moves for a certain distance on a spherical surface on the inner side of the differential case;
(4) whether the cross shaft groove and the inner side spherical surface of the differential case meet design requirements or not can be judged by observing the difference between the reading change and the zero position of the 4 ball head positioning pins and the dial indicator on the rotating shaft rotating around the center of the detection ring; through the change condition between the reading of each dial indicator and the zero position, the change data of the position of the cross shaft groove and the position of the spherical surface can be quickly detected.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111327542.6A CN114001615B (en) | 2021-11-10 | 2021-11-10 | Rapid detection device and detection method for automobile differential mechanism shell |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111327542.6A CN114001615B (en) | 2021-11-10 | 2021-11-10 | Rapid detection device and detection method for automobile differential mechanism shell |
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| CN114001615A true CN114001615A (en) | 2022-02-01 |
| CN114001615B CN114001615B (en) | 2023-09-19 |
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| CN202111327542.6A Active CN114001615B (en) | 2021-11-10 | 2021-11-10 | Rapid detection device and detection method for automobile differential mechanism shell |
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Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN202083332U (en) * | 2011-03-17 | 2011-12-21 | 宁波永信汽车部件制造有限公司 | Ball concentricity measurement device for casing of ball pin chain |
| CN202204426U (en) * | 2011-09-09 | 2012-04-25 | 江苏飞船股份有限公司 | Measuring device for spherical surface of planetary gear |
| CN206330509U (en) * | 2016-12-30 | 2017-07-14 | 北京中科奥倍超声波技术研究院 | Spherical surface of differential mechanism casing size checking device |
| CN207894358U (en) * | 2018-02-10 | 2018-09-21 | 上海汽车齿轮一厂 | Simple stylus percentage tabular form differential casing Internal Spherical Surface coaxality measuring mechanism |
| CN208458607U (en) * | 2018-08-03 | 2019-02-01 | 杭州杰途传动部件有限公司 | A kind of measuring tool beated for measuring differential casing Internal Spherical Surface |
| CN209355851U (en) * | 2019-03-22 | 2019-09-06 | 长春一汽四环金仑汽车零部件有限公司 | A kind of hole Internal Spherical Surface coaxiality check fixture for automobile differential shell |
| CN210981077U (en) * | 2020-01-09 | 2020-07-10 | 江西江铃底盘股份有限公司 | Checking fixture for position degree of inner spherical surface of differential shell to reference straight hole |
-
2021
- 2021-11-10 CN CN202111327542.6A patent/CN114001615B/en active Active
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0363809U (en) * | 1989-10-25 | 1991-06-21 | ||
| CN102052887A (en) * | 2010-11-04 | 2011-05-11 | 南车戚墅堰机车车辆工艺研究所有限公司 | Special detection tool for measuring inner arc radius of coupler knuckle cavity of transition coupler body |
| CN202083332U (en) * | 2011-03-17 | 2011-12-21 | 宁波永信汽车部件制造有限公司 | Ball concentricity measurement device for casing of ball pin chain |
| CN202204426U (en) * | 2011-09-09 | 2012-04-25 | 江苏飞船股份有限公司 | Measuring device for spherical surface of planetary gear |
| CN206330509U (en) * | 2016-12-30 | 2017-07-14 | 北京中科奥倍超声波技术研究院 | Spherical surface of differential mechanism casing size checking device |
| CN207894358U (en) * | 2018-02-10 | 2018-09-21 | 上海汽车齿轮一厂 | Simple stylus percentage tabular form differential casing Internal Spherical Surface coaxality measuring mechanism |
| CN208458607U (en) * | 2018-08-03 | 2019-02-01 | 杭州杰途传动部件有限公司 | A kind of measuring tool beated for measuring differential casing Internal Spherical Surface |
| CN209355851U (en) * | 2019-03-22 | 2019-09-06 | 长春一汽四环金仑汽车零部件有限公司 | A kind of hole Internal Spherical Surface coaxiality check fixture for automobile differential shell |
| CN210981077U (en) * | 2020-01-09 | 2020-07-10 | 江西江铃底盘股份有限公司 | Checking fixture for position degree of inner spherical surface of differential shell to reference straight hole |
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| CN114001615B (en) | 2023-09-19 |
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