CN113624477A - Device and method for measuring angle of rear torsion beam under different loads - Google Patents
Device and method for measuring angle of rear torsion beam under different loads Download PDFInfo
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- CN113624477A CN113624477A CN202110919867.7A CN202110919867A CN113624477A CN 113624477 A CN113624477 A CN 113624477A CN 202110919867 A CN202110919867 A CN 202110919867A CN 113624477 A CN113624477 A CN 113624477A
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- torsion beam
- angle
- rear torsion
- beam assembly
- mounting surface
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M13/00—Testing of machine parts
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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
- G01B21/00—Measuring arrangements or details thereof, where the measuring technique is not covered by the other groups of this subclass, unspecified or not relevant
- G01B21/22—Measuring arrangements or details thereof, where the measuring technique is not covered by the other groups of this subclass, unspecified or not relevant for measuring angles or tapers; for testing the alignment of axes
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M17/00—Testing of vehicles
- G01M17/007—Wheeled or endless-tracked vehicles
- G01M17/04—Suspension or damping
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T90/00—Enabling technologies or technologies with a potential or indirect contribution to GHG emissions mitigation
Abstract
The invention discloses a device and a method for measuring the angle of a rear torsion beam under different loads. The tool table is provided with a test plane, two sides of the test plane are provided with symmetrical fixing mechanisms, and the two groups of fixing mechanisms can fix the rear torsion beam assembly on the test plane; the fixing mechanism comprises a positioning column and a connecting column, the positioning column is used for fixing a shaft sleeve of the rear torsion beam assembly, and the connecting column is used for limiting a shock absorber of the rear torsion beam assembly. And the test plane is also provided with two wheel edge simulation pieces which are respectively arranged at the outer sides of the two connecting columns and are connected with the hub mounting surface of the rear torsion beam assembly. The combined digital display scale comprises probes in four directions, namely an upper direction, a lower direction, a left direction and a right direction, wherein the upper probe and the lower probe can measure the camber angle of the hub installation surface, and the left probe and the right probe can measure the toe-in angle of the hub installation surface. The invention can effectively and accurately measure the angle of the rear torsion beam assembly under different loads, and has lower test cost.
Description
Technical Field
The invention relates to the technical field of automobile measurement, in particular to a device and a method for measuring the angle of a rear torsion beam under different loads.
Background
The rear torsion beam assembly for the automobile is an important part assembly in an automobile suspension system, the precision of the rear torsion beam assembly plays an important role in the four-wheel positioning parameters of the automobile rear suspension, and particularly the precision of the machining angle of the hub mounting surface of the rear torsion beam assembly directly influences whether the toe-in angle and the camber angle in the four-wheel positioning parameters of the automobile rear suspension can meet the requirements or not; meanwhile, the change of the angle of the hub mounting surface of the rear torsion beam after the rear torsion beam is stressed and deformed under different stress loads needs to be detected and monitored, so that research personnel can sufficiently analyze and deal with the influence of the rear torsion beam assembly on the positioning parameters of the four wheels of the whole vehicle after the rear torsion beam assembly is stressed and deformed; it is particularly important to measure the machining angle of the hub mounting surface of the rear twist beam assembly.
At present, when the hub installation surface detection aiming at the rear torsion beam assembly is basically in a free state of the rear torsion beam assembly, dotting detection is carried out through three coordinates, and the detected dotting data and a three-dimensional digital analog of the existing rear torsion beam assembly are fitted by utilizing third-party three-dimensional editing software to measure a corresponding end surface angle value; the detection method needs three-coordinate detection equipment, the price of the equipment is high, the purchase needs to consume large research and development cost, and the detection scheme is difficult to realize hundred percent total detection in the production process of the rear torsion beam assembly; meanwhile, the detection scheme can not realize the measurement of the angle of the hub mounting surface after the rear torsion beam assembly deforms in a stressed state.
Therefore, how to provide a device and a method capable of effectively detecting the machining angle of the hub installation surface of the rear torsion beam assembly at low cost becomes a technical problem to be solved in the field.
Disclosure of Invention
The invention aims to provide a device and a method for measuring the angle of a rear torsion beam under different loads, which can visually check the packaging quality of a cigarette carton and the operation state of a packaging machine according to the forming state of the cigarette carton.
According to a first aspect of the invention, a device for measuring the angle of a rear torsion beam under different loads is provided, which comprises a tool table and a combined digital display scale;
the fixture table is provided with a test plane, two sides of the test plane are provided with symmetrical fixing mechanisms, and the two groups of fixing mechanisms can fix the rear torsion beam assembly on the test plane; the fixing mechanism comprises a positioning column and a connecting column, the positioning column is used for fixing a shaft sleeve of the rear torsion beam assembly, and the connecting column is used for limiting a shock absorber of the rear torsion beam assembly; the test plane is also provided with two wheel edge simulation pieces, the wheel edge simulation pieces are respectively arranged on the back outer sides of the two connecting columns and are connected with the hub mounting surface of the rear torsion beam assembly through bolts;
the combined type digital display scale is arranged between the connecting column and the wheel edge simulation part, the combined type digital display scale comprises probes in four directions, namely an upper direction, a lower direction, a left direction and a right direction, the upper probe and the lower probe can measure the camber angle of the hub mounting surface, and the left probe and the right probe can measure the toe-in angle of the hub mounting surface.
Optionally, according to the device for measuring the angle of the rear torsion beam under different loads, the two positioning columns are provided with the positioning holes, the inner sides of the two positioning holes are provided with the limiting convex rings, and the limiting convex rings are matched with the shaft sleeve.
Optionally, according to the device for measuring the angle of the rear torsion beam under different loads, the fixing mechanism further includes a positioning pin, and the positioning pin penetrates through the positioning hole from the outer side of the positioning column and is embedded in the shaft sleeve; and one side of the positioning pin, which is far away from the shaft sleeve, is provided with a positioning limiting block.
Optionally, according to the device for measuring the angle of the rear torsion beam under different loads, the fixing mechanism further includes a connecting pin, a connecting hole is formed in the connecting column, the shock absorber is clamped on two sides of the connecting column, and the connecting pin penetrates through the connecting hole and the shock absorber, so that the rear torsion beam assembly is fixed between the fixing mechanisms; and a connection limiting block is arranged on one side of the connecting pin.
Optionally, according to the device for measuring the angle of the rear torsion beam under different loads, the parallelism between the positioning column and the connecting column is less than 0.01mm, and the perpendicularity of the positioning column, the connecting column and the combined digital display scale relative to the test plane is less than 0.01 mm.
Optionally, according to the device for measuring the angle of the rear torsion beam under different loads, the combined digital display scale is in a cross structure, and the probes are respectively arranged on four directions of the combined digital display scale; and a camber angle display module is arranged on the vertical rod and a front toe angle display module is arranged on the transverse rod of the combined digital display scale.
Optionally, according to the device for measuring the angle of the rear torsion beam under different loads, the probes are distributed on a circumference with a diameter of 96mm, and the circle center is the cross center of the combined digital display scale.
Optionally, according to the apparatus for measuring an angle of a rear torsion beam under different loads, the toe-in angle satisfies a relation: b ═ arctan [ (X)1-X2)/96]，
Wherein b is a toe angle, X1For the left-hand probe to measure the distance, X, from the hub mounting surface2Measuring distance to the hub mounting surface for the right probe, (X)1-X2) Taking an absolute value;
the camber angle satisfies the relation: d ═ arctan [ (Y)1-Y2)/96]，
Wherein d is camber angle, Y1For the upper probe to measure the distance, Y, from the hub mounting surface2(Y) for the underside probe to measure the distance to the hub mounting surface1-Y2) And taking an absolute value.
According to another aspect of the present invention, there is provided a method for angle measurement of a rear torsion beam in a free state, including the apparatus for angle measurement of a rear torsion beam under different loads according to any one of the embodiments and the steps of:
s1: placing the tool table on a horizontal ground and firmly placing;
s2: fixing the rear torsion beam assembly on a tool table, matching a shaft sleeve of the rear torsion beam assembly with a positioning column, and matching a shock absorber of the rear torsion beam assembly with a connecting column; at the moment, the rear torsion beam assembly is completely fixed on the tooling table, and the angle measurement of the hub mounting surface can be carried out;
s3: the combined digital display scale is powered on through a switch on the combined display scale main body;
s4: distance parameters are measured by pushing two probes on a transverse rod of the combined digital display scale and enabling the probes to be attached to a hub mounting surface of the rear torsion beam assembly;
s5: reading the angle parameters from the toe-in angle display module, and judging whether the toe-in angle is qualified or not according to the color displayed by the toe-in angle display module;
s6: distance parameters are measured by pushing two probes on a vertical rod of the combined digital display scale and enabling the probes to be attached to a hub mounting surface of the rear torsion beam assembly;
s7: and reading the angle parameters from the camber angle display module, and judging whether the angle parameters are qualified or not according to the display color of the camber angle display module.
According to another aspect of the present invention, there is provided a method for measuring an angle of a rear torsion beam under different loads, including the apparatus for measuring an angle of a rear torsion beam under different loads according to any one of the embodiments and the steps of:
s1: placing the tool table on a horizontal ground and firmly placing;
s2: fixing the rear torsion beam assembly on a tool table, matching a shaft sleeve of the rear torsion beam assembly with a positioning column, matching a shock absorber of the rear torsion beam assembly with a connecting column, and connecting the shock absorber of the rear torsion beam assembly with a wheel edge simulation piece; at the moment, the rear torsion beam assembly is completely fixed on the tooling table, and the angle measurement of the hub mounting surface can be carried out;
s3: respectively mounting the wheel edge simulation pieces on the hub mounting surface of the rear torsion beam assembly by using bolts, so that the wheel edge simulation pieces are freely contacted with the tool table;
s4: the combined digital display scale is powered on through a switch on the combined display scale main body;
s5: applying a force value to the spring tray of the rear torsion beam assembly close to the two groups of fixing mechanisms by using a hydraulic machine;
s6: distance parameters are measured by pushing two probes on a transverse rod of the combined digital display scale and enabling the probes to be attached to a hub mounting surface of the rear torsion beam assembly;
s7: reading angle parameters on the toe-in angle display module from the middle via hole position of the wheel edge simulation piece;
s8: distance parameters are measured by pushing two probes on a vertical rod of the combined digital display scale and enabling the probes to be attached to a hub mounting surface of the rear torsion beam assembly;
s9: and reading the angle parameters on the camber angle display module from the middle via hole position of the wheel edge simulation piece.
The invention has the following beneficial effects:
1. the processing angle of the hub mounting surface of the rear torsion beam assembly can conveniently realize hundred percent of full detection; the unqualified products are prevented from flowing into the next procedure;
2. the specific numerical value and the display color of the machining angle of the hub mounting surface of the rear torsion beam assembly can be quickly read during detection, the detection in a fitting conversion mode through third-party three-dimensional software is avoided, and the detection efficiency is improved;
3. the change of the angle of the hub mounting surface after the rear torsion beam assembly is stressed and deformed under different loads is effectively measured, so that research personnel can be guided to sufficiently analyze and deal with the influence of the rear torsion beam assembly on the four-wheel positioning parameters of the whole vehicle after the rear torsion beam assembly is stressed and deformed;
4. the purpose that the angle of the hub installation surface of the rear torsion beam assembly in a two-dimensional drawing is converted into the angle which can be measured in a three-dimensional space is achieved.
5. The automatic identification of the angle detection of the hub mounting surface of the torque assembly and the automatic judgment of the detection data whether the torque assembly is qualified or not are realized after different vehicle types are different.
Other features of the present invention and advantages thereof will become apparent from the following detailed description of exemplary embodiments thereof, which proceeds with reference to the accompanying drawings.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description, serve to explain the principles of the invention.
FIG. 1 is a schematic view of a disclosed device for angle measurement of a rear twist beam under different loads;
FIG. 2 is a schematic view of the connection of the wheel-side simulator and the rear torsion beam assembly according to the present disclosure;
FIG. 3 is a schematic view of a positioning post according to the present disclosure;
FIG. 4 is a schematic structural view of a locating pin according to the present disclosure;
FIG. 5 is a schematic structural view of the connecting pin disclosed in the present invention;
FIG. 6 is a schematic structural diagram of the combined digital display scale disclosed in the present invention;
FIG. 7 is a schematic view of measuring toe angle according to the present invention;
FIG. 8 is a schematic view of the present invention measuring camber angle;
FIG. 9 is a schematic diagram of the operation of the combined digital display scale disclosed in the present invention;
FIG. 10 is a schematic view of the angle measurement of a rear twist beam disclosed in the present invention in a free state;
fig. 11 is a schematic view of the angle measurement of the rear twist beam disclosed in the present invention under different loads.
Description of reference numerals: 1-test plane; 2-a positioning column; 21-positioning holes; 22-a limit convex ring; 3-connecting a column; 4-wheel edge simulation piece; 41-bolt; 5-combined digital display scale; 51-a probe; 52-toe angle display module; 53-camber angle display module; 6-positioning pins; 61-positioning limit block; 7-a connecting pin; 71-a connection limit block; 8-rear torsion beam assembly; 81-hub mounting face; 82-shaft sleeve; 83-vibration damper; 84-spring tray.
Detailed Description
Various exemplary embodiments of the present invention will now be described in detail with reference to the accompanying drawings. It should be noted that: the relative arrangement of the components and steps, the numerical expressions and numerical values set forth in these embodiments do not limit the scope of the present invention unless specifically stated otherwise.
The following description of at least one exemplary embodiment is merely illustrative in nature and is in no way intended to limit the invention, its application, or uses.
Techniques, methods, and apparatus known to those of ordinary skill in the relevant art may not be discussed in detail but are intended to be part of the specification where appropriate.
In all examples shown and discussed herein, any particular value should be construed as merely illustrative, and not limiting. Thus, other examples of the exemplary embodiments may have different values.
It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, further discussion thereof is not required in subsequent figures.
As shown in fig. 1 to 8, the invention provides a device for measuring the angle of a rear torsion beam under different loads, which comprises a tool table and a combined digital display scale 5.
The tool table is provided with a test plane 1, two sides of the test plane 1 are provided with symmetrical fixing mechanisms, and the two groups of fixing mechanisms can fix the rear torsion beam assembly 8 on the test plane 1; the fixing mechanism comprises a positioning column 2 and a connecting column 3, the positioning column 2 is used for fixing a shaft sleeve 82 of the rear torsion beam assembly 8, and the connecting column 3 is used for limiting a shock absorber 83 of the rear torsion beam assembly 8; the test plane 1 is also provided with two wheel edge simulation pieces 4, the wheel edge simulation pieces 4 are respectively arranged on the back outer sides of the two connecting columns 3 and are connected with a hub mounting surface 81 of the rear torsion beam assembly 8 through bolts 41. In practice, wheel-side simulator 4 may select whether it is mounted to rear twist beam assembly 8 to measure the initial toe angle and initial camber angle of hub mounting surface 81 of rear twist beam assembly 8.
The combined digital display scale 5 is arranged between the connecting column 3 and the wheel edge simulation part 4, the combined digital display scale 5 comprises probes 51 in four directions, namely an upper direction, a lower direction, a left direction and a right direction, the upper probe 51 and the lower probe 51 can measure the camber angle of the hub mounting surface 81, and the left probe 51 and the right probe 51 can measure the toe-in angle of the hub mounting surface 81.
Furthermore, positioning holes 21 are formed in the two positioning columns 2, and limiting convex rings 22 are arranged on the inner sides of the two positioning holes 21 facing each other, and the limiting convex rings 22 are matched with the shaft sleeve 82. When the positioning hole is arranged, the diameter of the positioning hole 21 is equal to that of the shaft sleeve 82, and the inner diameter of the limiting convex ring 22 is equal to that of the shaft sleeve 82, so that the positioning column 2 can be stably embedded and positioned with the shaft sleeve 82.
Still further, the fixing mechanism further comprises a positioning pin 6, wherein the positioning pin 6 penetrates through the positioning hole 21 from the outer side of the positioning column 2 and is embedded with the shaft sleeve 82; the side of the positioning pin 6 away from the shaft sleeve 82 is provided with a positioning limiting block 61. When setting up, the diameter of locating pin 6 is unanimous with the internal diameter of axle sleeve 82 to make axle sleeve 82 stably overlap on locating pin 6, and locating pin 6 keeps away from the design of the one end of location restriction piece 61 for the fillet, be favorable to inserting between locating pin 6 and locating hole 21 and the axle sleeve 82.
Further, the fixing mechanism further comprises a connecting pin 8, a connecting hole is formed in the connecting column 3, the shock absorbers 83 are clamped on two sides of the connecting column 3, and the connecting pin 8 penetrates through the connecting hole and the shock absorbers 83 so as to fix the rear torsion beam assembly 8 between the fixing mechanisms; one side of the connecting pin 8 is provided with a connection restricting piece 71. During setting, the connecting hole in the connecting column 3 is equal to the aperture in the mounting bracket of the shock absorber 83, and the width of the connecting column 3 is smaller than the span of the holes in the mounting bracket of the shock absorber 83, so that the shock absorber 83 is in interference fit when mounted on the connecting column 3, and the shock absorber is prevented from shaking during measurement; in addition, the end of the connecting pin 8 away from the connecting limiting block 71 is rounded to facilitate the connecting pin 8 to pass through the connecting hole and the hole on the mounting bracket of the damper 83.
Furthermore, the parallelism between the positioning column 2 and the connecting column 3 is less than 0.01mm, and the verticality of the positioning column 2, the connecting column 3 and the combined digital display scale 5 relative to the test plane 1 is less than 0.01mm, so that the final measurement result is more accurate.
Further, as shown in fig. 6, the combined digital display scale 5 is in a cross-shaped structure, and the probes 51 are respectively arranged at four positions of the combined digital display scale 5; the vertical rod of the combined digital display scale 5 is provided with a camber angle display module 53, and the transverse rod is provided with a front toe angle display module 52.
The combined display scale body integrates a battery, a probe position sensor, a signal transmission and conversion device, a computing chip CPU, a switch, a code scanner and other modules, and the specific working principle is shown in FIG. 9;
the battery provides energy for the combined digital display scale 5; the switch provides power on and off functions for the combined digital display scale 5; the code scanner is used for scanning the bar code of the rear torsion beam assembly 8 and giving the calculation chip CPU design parameter values of the rear torsion beam assembly 8 of different vehicle types; the device is used for judging whether the actually detected numerical value meets the requirement of the design parameter value;
the probe position sensors are used for respectively detecting the positions of the four probes 51 and outputting distance parameters;
the signal transmission and conversion device converts the distance parameters measured by the probe position sensor and transmits the converted distance parameters to a CPU (central processing unit) of the computing chip;
the calculation chip CPU calculates the specific parameter value of the toe-in angle or the camber angle according to the received distance parameter of the probe 51, judges according to the design parameter value of the called rear torsion beam assembly 8 of different vehicle types, and finally transmits the specific parameter value to the camber angle display module 53 or the toe-in angle display module 52 for numerical value display and color display for visual and striking reminding, and displays green if qualified and red if unqualified; the probe 51 on the vertical rod is combined with a camber angle display module 53 for use and display; the probe 51 on the transverse bar is used and displayed in combination with a toe angle display module 52.
Still further, the probes 51 are distributed on a circumference with a diameter of 96mm, and the center of the circle is the cross center of the combined digital display scale 5.
Still further, as shown in fig. 7, the toe angle satisfies the relation: b ═ arctan [ (X)1-X2)/96]，
Wherein b is a toe angle, X1For the left hand probe 51 to measure the distance, X, from the hub mounting surface 812For the right side probe 51 to measure the distance from the hub mounting surface 81, (X)1-X2) Taking an absolute value;
as shown in fig. 8, the camber angle satisfies the relation: d ═ arctan [ (Y)1-Y2)/96]，
Wherein d is camber angle, Y1For the upper probe 51 to measure the distance, Y, from the hub mounting surface 812Is a lower side probe51 measured as the distance from the hub mounting surface 81, (Y)1-Y2) And taking an absolute value.
In implementation, the calculation logic of the calculation chip CPU of the combined digital display scale 5 follows the right triangle angle calculation principle, which is specifically as follows: the probes 51 of the combined digital display scale 5 are distributed on the circumference with the diameter of 96mm, namely the distance between the probes 51 on the transverse rod is 96mm, and the distance between the probes 51 on the vertical rod is also 96 mm;
assume that the distance value measured by the left probe 51 is X1The distance value measured by the right probe 51 is X2(ii) a The toe angle, i.e., the angle b, can be obtained from fig. 7 as b ═ a, tan a ═ X1-X2)/96, and b ═ a ═ arctan [ (X1-X2)/96]In the figure, L is the distance 96mm between the left probe and the right probe;
assume that the distance value measured by the upper probe 51 is Y1The distance value measured by the lower probe 51 is Y2(ii) a The camber angle, i.e., the d-angle, can be represented by d-c in fig. 8, tan c-Y1-Y2)/96, and d-c-arctan [ (Y1-Y2)/96]And H in the figure is the distance 96mm between the upper probe and the lower probe.
As shown in fig. 10, the present invention provides a method for measuring an angle of a rear torsion beam in a free state, including the following steps:
s1: placing the tool table on a horizontal ground and firmly placing;
s2: fixing the rear torsion beam assembly 8 on a tool table, matching a shaft sleeve 82 of the rear torsion beam assembly 8 with the positioning column 2, and matching a shock absorber 83 of the rear torsion beam assembly 8 with the connecting column 3; at the moment, the rear torsion beam assembly 8 is completely fixed on the tooling table, and the angle measurement of the hub mounting surface 81 can be carried out; in practice, the rear twist beam assembly 8 is further secured by a locating pin 6 and a connecting pin 8, respectively.
S3: the combined digital display scale 5 is powered on through a switch on the combined display scale main body;
s4: distance parameters are measured by pushing the two probes 51 on the transverse rod of the combined digital display scale 5 and enabling the probes to be attached to the hub mounting surface 81 of the rear torsion beam assembly 8;
s5: reading the angle parameter from the toe-in angle display module 52, and judging whether the angle parameter is qualified or not according to the color displayed by the toe-in angle display module 52;
s6: distance parameters are measured by pushing the two probes 51 on the vertical rod of the combined digital display scale 5 and enabling the probes to be attached to the hub mounting surface 81 of the rear torsion beam assembly 8;
s7: the angle parameter is read from the camber angle display module 53, and whether the color is qualified or not can be judged according to the display color of the camber angle display module 53.
As shown in fig. 11, the present invention further provides a method for measuring an angle of a rear torsion beam under different loads, including the apparatus for measuring an angle of a rear torsion beam under different loads according to any embodiment and the following steps:
s1: placing the tool table on a horizontal ground and firmly placing;
s2: fixing the rear torsion beam assembly 8 on a tooling table, matching a shaft sleeve 82 of the rear torsion beam assembly 8 with the positioning column 2, matching a shock absorber 83 of the rear torsion beam assembly 8 with the connecting column 3, and connecting the shock absorber 83 of the rear torsion beam assembly 8 with the wheel edge simulation part 4; at this time, the rear torsion beam assembly 8 is completely fixed on the tool table;
s3: the wheel edge simulation pieces 4 are respectively installed on the hub installation surface 81 of the rear torsion beam assembly 8 by using bolts 41, so that the wheel edge simulation pieces 4 are freely contacted with a tool table;
s4: the combined digital display scale 5 is powered on through a switch on the combined display scale main body;
s5: applying a force value to the spring trays of the rear torsion beam assembly 8 close to the two groups of fixing mechanisms by using a hydraulic machine;
s6: distance parameters are measured by pushing the two probes 51 on the transverse rod of the combined digital display scale 5 and enabling the probes to be attached to the hub mounting surface 81 of the rear torsion beam assembly 8;
s7: reading the angle parameters on the toe-in angle display module 52 from the middle via hole position of the wheel edge simulation part 4;
s8: distance parameters are measured by pushing the two probes 51 on the vertical rod of the combined digital display scale 5 and enabling the probes to be attached to the hub mounting surface 81 of the rear torsion beam assembly 8;
s9: the angle parameters on the camber angle display module 53 are read from the center via position in the wheel-side simulator 4.
The angle measuring device and method for the rear torsion beam under different loads can achieve the following technical effects:
1. the machining angle of the hub mounting surface 81 of the rear torsion beam assembly 8 can conveniently realize hundred percent of full detection, and unqualified products are prevented from flowing into the next procedure;
2. the specific numerical value and the display color of the machining angle of the hub mounting surface 81 of the rear torsion beam assembly 8 can be quickly read during detection, the detection in a fitting conversion mode through third-party three-dimensional software is avoided, and the detection efficiency is improved;
3. the change of the angle of the hub mounting surface 81 after the rear torsion beam assembly 8 is stressed and deformed under different loads is effectively measured, so that research and development personnel can be guided to sufficiently analyze and deal with the influence of the rear torsion beam assembly 8 on the four-wheel positioning parameters of the whole vehicle after being stressed and deformed;
4. the purpose that the angle of the hub mounting surface 81 of the rear torsion beam assembly 8 in a two-dimensional drawing is converted into a measurable angle in a three-dimensional space is achieved.
5. The automatic identification of the angle detection of the hub mounting surface 81 of the rear torsion assembly of different vehicle types and the automatic judgment of the detection data on whether the angle detection is qualified or not are realized.
Although some specific embodiments of the present invention have been described in detail by way of examples, it should be understood by those skilled in the art that the above examples are for illustrative purposes only and are not intended to limit the scope of the present invention. It will be appreciated by those skilled in the art that modifications may be made to the above embodiments without departing from the scope and spirit of the invention. The scope of the invention is defined by the appended claims.
Claims (10)
1. A device for measuring the angle of a rear torsion beam under different loads is characterized by comprising a tool table and a combined digital display scale;
the fixture table is provided with a test plane, two sides of the test plane are provided with symmetrical fixing mechanisms, and the two groups of fixing mechanisms can fix the rear torsion beam assembly on the test plane; the fixing mechanism comprises a positioning column and a connecting column, the positioning column is used for fixing a shaft sleeve of the rear torsion beam assembly, and the connecting column is used for limiting a shock absorber of the rear torsion beam assembly; the test plane is also provided with two wheel edge simulation pieces, the wheel edge simulation pieces are respectively arranged on the back outer sides of the two connecting columns and are connected with the hub mounting surface of the rear torsion beam assembly through bolts;
the combined type digital display scale is arranged between the connecting column and the wheel edge simulation part, the combined type digital display scale comprises probes in four directions, namely an upper direction, a lower direction, a left direction and a right direction, the upper probe and the lower probe can measure the camber angle of the hub mounting surface, and the left probe and the right probe can measure the toe-in angle of the hub mounting surface.
2. The device for measuring the angle of the rear torsion beam under different loads according to claim 1, wherein positioning holes are formed in the two positioning columns, and limiting convex rings are arranged on the inner sides of the two positioning holes and matched with the shaft sleeve.
3. The device for measuring the angle of the rear torsion beam under different loads according to claim 2, wherein the fixing mechanism further comprises a positioning pin, and the positioning pin penetrates through the positioning hole from the outer side of the positioning column and is embedded with the shaft sleeve; and one side of the positioning pin, which is far away from the shaft sleeve, is provided with a positioning limiting block.
4. The device for measuring the angle of the rear torsion beam under different loads according to claim 1, wherein the fixing mechanism further comprises a connecting pin, a connecting hole is formed in the connecting column, the shock absorber is clamped on two sides of the connecting column, and the connecting pin penetrates through the connecting hole and the shock absorber, so that the rear torsion beam assembly is fixed between the fixing mechanisms; and a connection limiting block is arranged on one side of the connecting pin.
5. The device of angle measurement under different loads of back twist beam according to claim 1, characterized in that, the degree of parallelism between reference column and the spliced pole is less than 0.01mm, the straightness that hangs down of reference column, spliced pole and the combination digital display scale relative to the test plane is less than 0.01 mm.
6. The device for measuring the angle of the rear torsion beam under different loads according to claim 1, wherein the combined digital display scale is in a cross structure, and the probes are respectively arranged on four directions of the combined digital display scale; and a camber angle display module is arranged on the vertical rod and a front toe angle display module is arranged on the transverse rod of the combined digital display scale.
7. The device for measuring the angle of the rear torsion beam under different loads according to claim 6, wherein the probes are distributed on a circumference with the diameter of 96mm, and the circle center is the cross center of the combined digital display scale.
8. The device of claim 7, wherein the toe angle satisfies the relationship: b ═ arctan [ (X)1-X2)/96]，
Wherein b is a toe angle, X1For the left-hand probe to measure the distance, X, from the hub mounting surface2Measuring distance to the hub mounting surface for the right probe, (X)1-X2) Taking an absolute value;
the camber angle satisfies the relation: d ═ arctan [ (Y)1-Y2)/96]，
Wherein d is camber angle, Y1For the upper probe to measure the distance, Y, from the hub mounting surface2(Y) for the underside probe to measure the distance to the hub mounting surface1-Y2) And taking an absolute value.
9. A method of angle measurement of a rear twist beam in a free state, comprising the steps of the apparatus of angle measurement of a rear twist beam under different loads according to any one of claims 1 to 8 and:
s1: placing the tool table on a horizontal ground and firmly placing;
s2: fixing the rear torsion beam assembly on a tool table, matching a shaft sleeve of the rear torsion beam assembly with a positioning column, and matching a shock absorber of the rear torsion beam assembly with a connecting column; at the moment, the rear torsion beam assembly is completely fixed on the tooling table, and the angle measurement of the hub mounting surface can be carried out;
s3: the combined digital display scale is powered on through a switch on the combined display scale main body;
s4: distance parameters are measured by pushing two probes on a transverse rod of the combined digital display scale and enabling the probes to be attached to a hub mounting surface of the rear torsion beam assembly;
s5: reading the angle parameters from the toe-in angle display module, and judging whether the toe-in angle is qualified or not according to the color displayed by the toe-in angle display module;
s6: distance parameters are measured by pushing two probes on a vertical rod of the combined digital display scale and enabling the probes to be attached to a hub mounting surface of the rear torsion beam assembly;
s7: and reading the angle parameters from the camber angle display module, and judging whether the angle parameters are qualified or not according to the display color of the camber angle display module.
10. A method of angle measurement of a rear twist beam under different loads, comprising the steps of:
s1: placing the tool table on a horizontal ground and firmly placing;
s2: fixing the rear torsion beam assembly on a tool table, matching a shaft sleeve of the rear torsion beam assembly with a positioning column, matching a shock absorber of the rear torsion beam assembly with a connecting column, and connecting the shock absorber of the rear torsion beam assembly with a wheel edge simulation piece; at the moment, the rear torsion beam assembly is completely fixed on the tooling table, and the angle measurement of the hub mounting surface can be carried out;
s3: respectively mounting the wheel edge simulation pieces on the hub mounting surface of the rear torsion beam assembly by using bolts, so that the wheel edge simulation pieces are freely contacted with the tool table;
s4: the combined digital display scale is powered on through a switch on the combined display scale main body;
s5: applying a force value to the spring tray of the rear torsion beam assembly close to the two groups of fixing mechanisms by using a hydraulic machine;
s6: distance parameters are measured by pushing two probes on a transverse rod of the combined digital display scale and enabling the probes to be attached to a hub mounting surface of the rear torsion beam assembly;
s7: reading angle parameters on the toe-in angle display module from the middle via hole position of the wheel edge simulation piece;
s8: distance parameters are measured by pushing two probes on a vertical rod of the combined digital display scale and enabling the probes to be attached to a hub mounting surface of the rear torsion beam assembly;
s9: and reading the angle parameters on the camber angle display module from the middle via hole position of the wheel edge simulation piece.
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