CN110823049A - Rear suspension lower body checking fixture and detection method thereof - Google Patents
Rear suspension lower body checking fixture and detection method thereof Download PDFInfo
- Publication number
- CN110823049A CN110823049A CN201911170762.5A CN201911170762A CN110823049A CN 110823049 A CN110823049 A CN 110823049A CN 201911170762 A CN201911170762 A CN 201911170762A CN 110823049 A CN110823049 A CN 110823049A
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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
- G01B5/0002—Arrangements for supporting, fixing or guiding the measuring instrument or the object to be measured
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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
- G01B5/0002—Arrangements for supporting, fixing or guiding the measuring instrument or the object to be measured
- G01B5/0004—Supports
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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
- G01B5/14—Measuring arrangements characterised by the use of mechanical techniques for measuring distance or clearance between spaced objects or spaced apertures
-
- 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)
- Vehicle Body Suspensions (AREA)
Abstract
The invention aims to provide a rear suspension lower body checking fixture which is convenient to operate, high in detection precision and low in cost, and further aims to provide a detection method of the rear suspension lower body checking fixture. The hole core of the connecting hole, to which the rear suspension lower body is positioned, is located in the vertical direction, and then the positions and the distance of the two connecting arms of the support, the position of the welding nut and the coaxiality of the hole axis of the welding nut and the axis of the mounting hole are detected.
Description
Technical Field
The invention relates to the technical field of automobile part detection, in particular to a detection tool for a rear suspension lower body and a detection method thereof.
Background
The suspension system of the automobile power assembly is an elastic connecting piece between the power assembly and an automobile body and mainly plays roles of supporting the weight of the power assembly, limiting the displacement of the power assembly under various working conditions, attenuating the vibration transmitted to the automobile body by the excitation of the power assembly and the like. In most cases, an automobile power assembly suspension system comprises a left suspension component, a right suspension component and a rear suspension component, and the NVH performance of the whole automobile is directly influenced by the installation angle, the installation position and the rigidity of each suspension component on an automobile body. The rear suspension consists of a rear suspension upper body and a rear suspension lower body, wherein the rear suspension lower body is as shown in figures 1-3, an opening between two connecting arms at one end of a bracket 3 is used for connecting with the rear suspension upper body, so that the distance between the connecting arms is required to be consistent with the thickness of the connecting part of the rear suspension upper body, mounting holes 2 are respectively arranged on the two connecting arms, a welding nut 1 is fixed on the outer side of one connecting arm, in order to ensure the reliability of the connection with the rear suspension upper body, the coaxiality of the axes of the welding nut holes and the axes of the mounting holes 2 is required to be ensured, the other end of the bracket 3 is a connecting outer pipe, a vulcanized outer pipe 4, a rubber main spring and an inner pipe are assembled with the connecting outer pipe in an interference fit mode after being vulcanized together, a connecting hole 5 in the inner pipe is used for being connected with an auxiliary frame, in order to ensure the stress balance among all the parts, and the support 3 and the vulcanization outer tube 4 are symmetrical with respect to the center line.
In the prior art, the distance between the support 3 and the vulcanizing outer tube 4 relative to the central line is mostly directly measured by measuring tools such as vernier calipers to judge whether the symmetry meets the requirement, and the detection efficiency is low in the mode, so that the requirement of batch detection cannot be met; the coaxiality of the axis of the welding nut hole and the axis of the mounting hole 2 is detected through a simple straight pin, the detection is inaccurate, and the condition of real vehicle assembly cannot be simulated; the spatial position of the weld nut 1 is measured by three coordinates, which is inefficient and costly.
Disclosure of Invention
The invention aims to provide a rear suspension lower body checking fixture which is convenient to operate, high in detection precision and low in cost.
In order to achieve the purpose, the invention adopts the technical scheme that: a rear suspension lower body detection tool is characterized in that a base is provided with a lower support, a positioning block and a clamping mechanism, the lower support is provided with a press fit to limit the position of a rear suspension lower body in the vertical direction, the positioning block is provided with a positioning pin corresponding to the position of a connecting hole, the positioning block supports the hole core of the connecting hole in the rear suspension lower body to be located in the vertical direction, the base is provided with a detection assembly used for detecting the positions and the intervals of two connecting arms of a support, the position of a welding nut and the coaxiality of the hole axis of the welding nut and the axis of a mounting hole, the detection assembly comprises a support fixed on the base, and a first fixing block used for.
The invention further aims to provide a detection method of the rear suspension lower body gauge.
In order to achieve the purpose, the invention adopts the technical scheme that: a detection method of a rear suspension lower body checking fixture comprises the following steps:
A) opening the clamping mechanism to an avoidance position, aligning a connecting hole of the rear suspension lower body with the positioning pin and inserting the positioning pin, aligning an opening between two connecting arms of the bracket with the first fixing block for placement, and then clamping the rear suspension lower body by using the clamping mechanism;
B) and inserting a detection pin or an optical axis bolt or a threaded shaft bolt into the through hole, the axis of the welded nut hole and the mounting hole.
In the scheme, the hole core of the connecting hole for positioning the rear suspension lower body to the rear suspension lower body is located in the vertical direction, and then the positions and the distance of the two connecting arms of the support, the position of the welding nut and the coaxiality of the hole axis of the welding nut and the axis of the mounting hole are detected.
Drawings
Fig. 1-3 are structural views of the rear suspension lower body;
FIG. 4 is a schematic overall structure diagram of the gauge;
FIG. 5 is a front view of a detection assembly according to one embodiment;
FIG. 6 is a sectional view taken along line A-A of FIG. 5;
FIG. 7 is a diagram of the structure of the optical axis plug according to the second embodiment;
FIG. 8 is a front view of a neutral detection block;
FIG. 9 is a view of a state of use of the gauge;
fig. 10 is a usage state diagram of the neutral detection block.
Detailed Description
As shown in fig. 4, a rear suspension lower body detection tool, a positioning block 20 and a clamping mechanism 30 which are arranged on a base 10 and are supported by the base to limit the position of the rear suspension lower body a in the vertical direction in a press fit manner, a positioning pin 21 corresponding to the position of a connecting hole 5 is arranged on the positioning block 20, a hole core of the connecting hole 5 on the positioning block 20 supporting the rear suspension lower body a is located in the vertical direction, a detection component for detecting the position and the distance between two connecting arms of a support 3, the position of a welding nut 1 and the coaxiality of the hole axis of the welding nut and the axis of a mounting hole 2 is arranged on the base 10, the detection component comprises a support 41 fixed on the base 10, and a first fixing block 42 for limiting the position of the rear suspension. The diameter of the positioning pin 21 is equal to the difference between the maximum entity value of the connecting hole 5 and the position degree of the connecting hole 5, because there is only one connecting hole 5, if the positioning is performed only by the matching of the connecting hole 5 and the positioning pin 21, the rear suspension body a can also rotate around the positioning pin 21 in the horizontal plane, here, the position of the rear suspension body a in the horizontal plane is limited by the first fixing block 42 on the support 41 ingeniously, on one hand, the first fixing block 42 functions as a limiting block, and on the other hand, the first fixing block 42 can be used for detecting the positions and the distance between two connecting arms of the bracket. After rear suspension lower part of the body A position is injectd, detecting other indexes, it is high to detect the precision, this utensil of examining simple structure, convenient operation, multiple functional and with low costs.
As a preferred scheme of the invention, a first fixing block 42 and a second fixing block 43 are arranged on a support 41 at intervals, the width of the first fixing block 42 is matched with the distance L between two connecting arms of a bracket 3, the center line of the first fixing block 42 is collinear with the center line of a positioning pin 21, the distance between the first fixing block 42 and the second fixing block 43 is matched with the sum of the thickness of a welding nut 1 and the thickness of the connecting arm at the side, through holes a are respectively arranged on the first fixing block 42 and the second fixing block 43, and the hole core connecting line of the two through holes a is collinear with the axis of a hole of the welding nut and the axis of an installation hole 2. When the connecting hole 5 is aligned with the positioning pin 21 and the opening between the two connecting arms of the bracket 3 is aligned with the first fixing block 42, if the first fixing block 42 can be smoothly clamped into the opening and the welding nut 1 can also be smoothly clamped between the first fixing block 42 and the second fixing block 43, the distance between the two connecting arms of the bracket 3 and the sum of the thickness of the welding nut 1 and the thickness of the connecting arm at the side are qualified, otherwise, the distance is unqualified. The detailed scheme about the detection of the axes of the weld nut hole and the mounting hole 2 is as follows in the three embodiments.
Example one
Referring to fig. 5 and 6, the outer side of the second fixed block 43 is provided with a detection pin 44, a pin body 441 of the detection pin 44 is disposed in the through hole a of the second fixed block 43 and passes through the through hole, a return spring 45 is sleeved on the pin body 441 between the outer end surface of the second fixed block 43 and the ball knob 442, the return spring 45 provides elastic force to drive the detection pin 44 to move towards the side away from the first fixed block 42, the other end of the pin body 441 is provided with a detection head 443, the detection head 443 is cylindrical, and the outer diameter of the detection head 443 matches the diameter of the welding nut hole and the mounting hole 2. During detection, the detection pin 44 is pushed to move in the through hole a by force against the elastic force of the return spring 45, so that the detection head 443 is inserted into the welding nut hole and the mounting hole 2, if the detection head 443 can be inserted smoothly, the welding nut hole and the mounting hole 2 are concentric, otherwise, the welding nut hole and the mounting hole 2 are different; after the detection is finished, the detection pin 44 is loosened by hand, the detection pin 44 automatically resets under the action of the return spring 45 and is drawn out from the welding nut hole and the mounting hole 2, and the detection efficiency is improved. Compared with a simple straight pin in the prior art, the detection pin 44 needs to pass through three holes simultaneously, so that the detection precision is improved.
In order to ensure that the shaft core of the detection pin 44 is always on the same straight line in the moving process and prevent the shaft core of the detection pin 44 from inclining to cause errors, a guide sleeve 45 is arranged in a through hole a on the second fixing block 43, the outer diameter of the guide sleeve 45 is matched with the aperture of the through hole a, the inner diameter of the guide sleeve 45 is matched with the shaft diameter of the pin body 441, an annular groove is arranged on the outer wall of the guide sleeve 45 along the circumferential direction of the guide sleeve, and a fastening bolt 46 is screwed in the annular groove of the guide sleeve 45 from the outer side of the second fixing block 43 and abuts. The core wire of the guide sleeve 45 is collinear with the hole core of the through hole a, so that the shaft core of the detection pin 44 is always on the same straight line in the moving process, and the detection precision is improved.
Example two
As shown in fig. 7, the detecting assembly 40 further includes an optical axis plug 47 including a handle section 471, a large diameter shaft section 472 and a small diameter shaft section 473 connected in sequence, wherein the shaft diameter of the large diameter shaft section 472 is equal to the difference between the largest solid inner diameter of the mounting hole 2 and the coaxiality thereof, and the shaft diameter of the small diameter shaft section 473 is equal to the bore diameter of the welding nut hole. The optical axis bolt 47 has a simple structure, is convenient to process, is suitable for batch detection, but cannot simulate the real vehicle state, and has slightly low precision.
EXAMPLE III
The detection assembly 40 further comprises a threaded shaft plug pin comprising a handle, a light shaft section and a threaded shaft section which are connected in sequence, wherein the shaft diameter of the light shaft section is equal to the difference between the maximum solid inner diameter of the mounting hole 2 and the coaxiality of the mounting hole, and the nominal diameter of the external thread of the threaded shaft section is equal to the nominal diameter of the welded nut hole. The threaded shaft section is in threaded fit with the welding nut hole, the assembly state of a real vehicle is simulated, the detection precision is high, the time for screwing the threaded shaft section into the welding nut hole is long, the detection efficiency is low slightly, and the method is more suitable for selective inspection.
Further, as shown in fig. 8, the base 10 is further provided with a centering detection block 50 for detecting the centering of the support 3 and the outer tube 4, the centering detection block 50 is provided with a central symmetrical stepped groove 51 from top to bottom, the width s1 of the upper large groove is equal to the width s3 of the vulcanized outer tube 4, the width s2 of the lower small groove is equal to the width s4 of the support 3, and the joint of the large groove and the small groove is in chamfer transition. Because the large groove and the small groove are arranged in a central symmetry manner, the detection bracket 3 and the outer tube 4 are directly aligned with the large groove and the small groove to be placed, and the operation is simple and rapid.
The clamping mechanism 30 is a turnover type quick clamp, the clamping position of the quick clamp corresponds to the positioning pin 21, in order to avoid the positioning pin 21, the clamping head is in a horseshoe shape, and handles 11 are further arranged at two end parts of the base 10, so that the whole checking fixture can be moved conveniently.
A detection method of a rear suspension lower body checking fixture comprises the following steps:
A) opening the clamping mechanism 30 to the avoidance position, aligning the connecting hole 5 of the rear suspension lower body A with the positioning pin 21 and inserting the same, aligning the opening between the two connecting arms of the bracket 3 with the first fixing block 42, and then clamping the rear suspension lower body A by the clamping mechanism 30;
B) the detection pin 44 or the optical axis pin 47 or the threaded shaft pin is inserted into the through hole a, the weld nut hole axis and the mounting hole 2.
Since the outer tube and the vulcanized outer tube 4 are connected for detection of the neutrality individually, independently of other parts, the rear suspension lower body a is held by hand before step a) or after step B) to put the outer tube and the vulcanized outer tube 4 of the rear suspension lower body a into alignment with the stepped groove 51 of the centering detection block 50.
Claims (10)
1. A rear suspension underbody shield, comprising: the detection device comprises a base (10), a lower support, a positioning block (20) and a clamping mechanism (30) are arranged on the base (10), the lower support is provided with a positioning pin (21) corresponding to the position of a connecting hole (5), the positioning block (20) supports the hole core of the connecting hole (5) in the lower suspension body A and is located in the vertical direction, the base (10) is provided with two connecting arm positions and intervals for detecting a support (3), the position of a welding nut (1) and the coaxiality of the hole axis of the welding nut and the axis of a mounting hole (2), the detection component comprises a support (41) fixed on the base (10), and a first fixing block (42) for limiting the position of the lower suspension body A in the horizontal plane is arranged on the support (41).
2. The rear suspension fixture of claim 1, wherein: the support (41) on be provided with first, two fixed blocks (42, 43) at the interval, the width of first fixed block (42) coincide with the distance L between two linking arms of support (3) and the central line of first fixed block (42) and the central line collineation of locating pin (21), the distance between first, two fixed blocks (42, 43) coincide with the thickness sum of weld nut (1) thickness and this side linking arm, all seted up on first, two fixed blocks (42, 43) through-hole (a), and the hole core line and the weld nut hole axis of two through-holes (a) and mounting hole (2) axis collineation.
3. The rear suspension fixture of claim 2, wherein: the outer side of the second fixing block (43) is provided with a detection pin (44), a pin body (441) of the detection pin (44) is arranged in a through hole (a) in the second fixing block (43) to penetrate through, a return spring (45) is sleeved on the pin body (441) between the outer end face of the second fixing block (43) and the ball head handle (442), the return spring (45) provides elastic force to drive the detection pin (44) to move towards one side far away from the first fixing block (42), the other end of the pin body (441) is provided with a detection head (443), the detection head (443) is cylindrical, and the outer diameter of the detection head is matched with the aperture of the welding nut hole and the aperture of the mounting hole (2).
4. The rear suspension lower body gauge according to claim 3, wherein: a guide sleeve (45) is arranged in the through hole (a) in the second fixing block (43), the outer diameter of the guide sleeve (45) is matched with the aperture of the through hole (a), the inner diameter of the guide sleeve is matched with the shaft diameter of the pin body (441), an annular groove is formed in the outer wall of the guide sleeve (45) along the circumferential direction of the guide sleeve, and a fastening bolt (46) is screwed into the annular groove of the guide sleeve (45) from the outer side of the second fixing block (43) and abuts against the inside of the annular groove.
5. The rear suspension fixture of claim 2, wherein: the detection assembly (40) further comprises an optical axis plug pin (47) which comprises a handle section (471), a large-diameter shaft section (472) and a small-diameter shaft section (473) which are connected in sequence, wherein the shaft diameter of the large-diameter shaft section (472) is equal to the difference between the largest solid inner diameter of the mounting hole (2) and the coaxiality of the largest solid inner diameter, and the shaft diameter of the small-diameter shaft section (473) is equal to the aperture of the welded nut hole.
6. The rear suspension fixture of claim 2, wherein: the detection assembly (40) further comprises a threaded shaft plug pin which comprises a handle, a light shaft section and a threaded shaft section which are sequentially connected, wherein the shaft diameter of the light shaft section is equal to the difference between the maximum solid inner diameter of the mounting hole (2) and the coaxiality of the mounting hole, and the nominal diameter of an external thread of the threaded shaft section is equal to the nominal diameter of a welding nut hole.
7. The rear suspension fixture of claim 1, wherein: the base (10) is further provided with a centering detection block (50) for detecting the centering of the support (3) and the outer pipe (4), the centering detection block (50) is provided with a central symmetrical stepped groove (51) from top to bottom, the width s1 of the upper large groove is equal to the width s3 of the vulcanized outer pipe (4), the width s2 of the lower small groove is equal to the width s4 of the support (3), and the joint of the large groove and the small groove is in chamfer transition.
8. The rear suspension fixture of claim 1, wherein: the clamping mechanism (30) is a turnover type quick clamp, the chuck is in a horseshoe shape, and handles (11) are arranged at two end parts of the base (10).
9. A detection method of a rear suspension lower body checking fixture is characterized by comprising the following steps:
A) opening the clamping mechanism (30) to an avoidance position, aligning a connecting hole (5) of the rear suspension lower body A with the positioning pin (21) and inserting the connecting hole, aligning an opening between two connecting arms of the bracket (3) with the first fixing block (42) for placing, and then clamping the rear suspension lower body A by the clamping mechanism (30);
B) and a detection pin (44) or an optical axis bolt (47) or a threaded shaft bolt is inserted into the through hole (a), the axis of the welding nut hole and the mounting hole (2).
10. The detection method of the rear suspension lower body check tool according to claim 1, wherein: before the step A) or after the step B), the rear suspension lower body A is held by hand to align the connecting outer tube and the vulcanized outer tube (4) of the rear suspension lower body A with the stepped groove (51) of the centering detection block (50).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911170762.5A CN110823049A (en) | 2019-11-26 | 2019-11-26 | Rear suspension lower body checking fixture and detection method thereof |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911170762.5A CN110823049A (en) | 2019-11-26 | 2019-11-26 | Rear suspension lower body checking fixture and detection method thereof |
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| CN110823049A true CN110823049A (en) | 2020-02-21 |
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| CN201911170762.5A Pending CN110823049A (en) | 2019-11-26 | 2019-11-26 | Rear suspension lower body checking fixture and detection method thereof |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111981937A (en) * | 2020-07-14 | 2020-11-24 | 东风(武汉)实业有限公司 | Bracket detection device |
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| CN85104590A (en) * | 1985-06-08 | 1986-12-03 | 四川省锦江油泵油嘴厂附属工厂 | wire elongation tester |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111981937A (en) * | 2020-07-14 | 2020-11-24 | 东风(武汉)实业有限公司 | Bracket detection device |
| CN111981937B (en) * | 2020-07-14 | 2022-09-27 | 东风(武汉)实业有限公司 | Bracket detection device |
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Application publication date: 20200221 |