CN114705344B - Device and method for measuring and testing operation force of parking system of passenger car - Google Patents
Device and method for measuring and testing operation force of parking system of passenger car Download PDFInfo
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- CN114705344B CN114705344B CN202210320590.0A CN202210320590A CN114705344B CN 114705344 B CN114705344 B CN 114705344B CN 202210320590 A CN202210320590 A CN 202210320590A CN 114705344 B CN114705344 B CN 114705344B
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- 238000012360 testing method Methods 0.000 title claims abstract description 39
- 238000000034 method Methods 0.000 title abstract description 13
- 230000007704 transition Effects 0.000 claims abstract description 36
- 238000006243 chemical reaction Methods 0.000 claims abstract description 9
- 238000013461 design Methods 0.000 claims abstract description 7
- 230000006835 compression Effects 0.000 claims abstract description 4
- 238000007906 compression Methods 0.000 claims abstract description 4
- 238000005259 measurement Methods 0.000 claims description 13
- 238000010998 test method Methods 0.000 claims description 5
- 230000008569 process Effects 0.000 abstract description 6
- 238000012827 research and development Methods 0.000 abstract description 6
- 238000011161 development Methods 0.000 abstract description 2
- 238000001514 detection method Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000033001 locomotion Effects 0.000 description 2
- 238000007792 addition Methods 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
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- 238000006467 substitution reaction Methods 0.000 description 1
- 238000012795 verification Methods 0.000 description 1
Classifications
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
- G01L5/00—Apparatus for, or methods of, measuring force, work, mechanical power, or torque, specially adapted for specific purposes
- G01L5/22—Apparatus for, or methods of, measuring force, work, mechanical power, or torque, specially adapted for specific purposes for measuring the force applied to control members, e.g. control members of vehicles, triggers
-
- 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
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Force Measurement Appropriate To Specific Purposes (AREA)
Abstract
The invention discloses a device and a method for measuring and testing the operating force of a parking system of a passenger car, wherein the device is fixed on the parking system and comprises the following components: the transition plate is arranged on the top surface of a parking motor of the parking system and is in contact with an upper shell of the parking motor; the tension and pressure sensor is arranged on the top surface of the transition plate and is contacted with the transition plate; the compression fixing structure is used for fixing the tension pressure sensor and compressing the transition plate downwards; the transition plate can timely transmit the operation reaction force of the parking motor to the pull pressure sensor. The invention solves the problem that the operation force of the parking system of the hybrid power electric drive assembly is not easy to directly measure, successfully verifies design target parameters in the design and development process, and saves the research and development cost and period.
Description
Technical Field
The invention relates to the technical field of passenger car test devices, in particular to a passenger car parking system operating force measurement test device and method.
Background
In the research and development process of the parking system of the passenger car, the operation force of the parking system needs to be measured, but in the parking system structure of the narrow hybrid electric drive assembly, the direct measurement of the operation force of the parking system is almost impossible to finish on the basis of not damaging the original structure.
Chinese patent application CN101264757B discloses a vehicle operating pedal device and an operating device with a load sensor. A clevis pin (connecting pin) is inserted in the clearance hole and is displaceable relative to the operating pedal. The pivotal movement linkage is disposed between the clevis pin and the sensor pin of the load sensor. Even if the operating pedal and the operating lever are relatively pivoted about the axis of the clevis pin in accordance with the depression operation of the operating pedal, the reaction force applied from the clevis pin to the load sensor always acts in a substantially constant direction. In this way, the detection accuracy of the load sensor is improved, and a change in the detection accuracy can be prevented, thereby having high reliability. The conventional vehicle operating pedal device and operating device with load sensor have a large number of parts, a complex structure, and high cost.
Chinese patent application CN109649355a discloses a device for measuring the force required to apply a mechanical parking brake of a motor vehicle. The device comprises a body adapted to be mounted to a parking brake lever of the type that is manually pivotable about an axis to apply a parking brake. The first and second force sensors are disposed on the body at different distances from the pivot axis of the lever when the body is mounted to the lever. The force sensor measures a force applied to a lower surface of the lever to pivot the lever to apply the parking brake when the lever is pulled upward. An angle sensor is provided on the body and measures an actuation angle at which the lever pivots about the pivot axis during application of the parking brake. The electronic unit reads the respective first and second forces applied to the force sensor during pivoting of the lever, thereby calculating an effective actuation force applied at a reference point on the lever and correlating the effective actuation force with the actuation angle. The above-mentioned existing devices for measuring the force required for applying the mechanical parking brake of a motor vehicle have a large number of parts, a complex structure, high costs, the need for different sensors and complex data processing.
Aiming at a certain type of existing passenger car in-process hybrid electric drive assembly parking system (shown in fig. 1), in the running process of a passenger car parking system 4, an ejector rod of a parking motor 41 overcomes the spring pressing force in a parking module 44 to do linear reciprocating motion, so that the top end of a pawl in the parking module 44 is hung into a parking ratchet wheel 43, and the output shaft part of an electric drive assembly transmission is mechanically locked to achieve the purpose of fixing a vehicle. The actuating force of the parking system 4 is measured, i.e. the plunger of the parking motor 41 is measured against the spring contact force in the parking module 44. In the moving process of the parking system, the distance between the ejector rod of the parking motor 41 and the parking module 44 is changed between 0 mm and 4.5mm, and the existing pressure sensor cannot be arranged in an excessively small space, so that the existing measuring method cannot directly measure the operating force of the parking system.
Disclosure of Invention
Aiming at the defects existing in the prior art, the invention aims to provide a device and a method for measuring and testing the operating force of a parking system of a passenger car. According to the structural characteristics of the parking system of the passenger car hybrid power electric drive assembly, the numerical value of the operating force of the parking system is obtained through indirect measurement. The invention solves the problem that the operation force of the parking system of the hybrid power electric drive assembly is not easy to directly measure, successfully verifies design target parameters in the design and development process, and saves the research and development cost and period.
In order to solve the technical problems, the invention is realized by the following technical scheme:
in one aspect, the present invention provides a passenger car parking system operating force measurement test apparatus, the test apparatus being fixed to the parking system, comprising:
the transition plate is arranged on the top surface of a parking motor of the parking system and is in contact with an upper shell of the parking motor;
the tension and pressure sensor is arranged on the top surface of the transition plate and is contacted with the transition plate; and
the compression fixing structure is used for fixing the tension pressure sensor and compressing the transition plate downwards; the transition plate can timely transmit the operation reaction force of the parking motor to the pull pressure sensor.
Preferably, the pressing fixing structure includes a fixing assembly for fixing the tension pressure sensor and a pressing assembly for supporting and fixing the fixing assembly.
It is further preferred that the fixing assembly comprises an upper end cap and a fixing bolt which passes downwardly through the upper end cap to be screwed with the tension pressure sensor.
Still further preferably, the upper end cover has a disc-shaped structure, and the planar area of the upper end cover is larger than the cross-sectional areas of the pull pressure sensor, the transition plate and the parking motor.
Still further preferably, the pressing component comprises a plurality of support rods with external threads at two ends, the upper ends of the support rods penetrate through the upper end cover upwards and are fastened and connected by fixing nuts, and the lower ends of the support rods are fastened and connected with existing screw holes on the electric drive assembly shell of the parking system.
Still further preferably, the supporting rods are arranged around the tension and pressure sensor at intervals, and gaps are formed among the supporting rods, the tension and pressure sensor, the transition plate and the parking motor.
Preferably, the transition plate includes a cross plate that completely covers the bottom of the pull pressure sensor and a riser that extends downward along the bottom of the cross plate to form contact with the upper housing of the parking motor.
On the other hand, the invention also provides a test method of the passenger car parking system operation force measurement test device, which comprises the following steps:
s1, performing system assembly on a parking motor, an electric drive assembly shell, a parking ratchet wheel and a parking module according to design requirements to obtain a test object parking system;
s2, fixedly assembling the test device on a test object parking system;
s3, starting the parking system, transmitting the reaction force received by the parking motor to the tension pressure sensor through the transition plate, and indirectly obtaining the operation force of the parking system by reading the value of the tension pressure sensor.
Preferably, the O-ring of the park motor is removed prior to the park system operating force test.
Compared with the prior art, the invention has the following advantages:
in the practical research and development verification work, the test method is utilized: 1. the parking system operation force test is completed, and effective data are obtained; 2. according to the testing method and device, the sensor is installed outside the parking system in an innovative way, and the measurement of the operating force is indirectly completed; 3. the research and development period is shortened, and the research and development cost is greatly reduced.
Drawings
FIG. 1 is a schematic diagram of a parking system of a hybrid electric drive assembly for a passenger car of the prior art;
FIG. 2 is a schematic diagram of an application structure of the test device of the present invention to a parking system;
FIG. 3 is a schematic exploded view of the test device of FIG. 2;
FIG. 4 is a schematic view of the partial structure of FIG. 2;
fig. 5 is a mounting interface for the park motor when mounted to the electric drive assembly.
Reference numerals: 1. a pull pressure sensor; 2. compressing the fixed structure; 21. a fixing assembly; 211. an upper end cap; 212. a fixing bolt; 22. a compression assembly; 221. a support rod; 222. a fixing nut; 223. the existing screw hole; 3. a transition plate; 31. a cross plate; 32. a riser; 4. a parking system; 41. a parking motor; 411. an O-ring; 42. an electric drive assembly housing; 43. a parking ratchet; 44. and a parking module.
Detailed Description
In order that those skilled in the art will better understand the technical solutions of the present invention, preferred embodiments of the present invention will be described below with reference to specific examples, but it should be understood that the drawings are for illustrative purposes only and should not be construed as limiting the present patent; for the purpose of better illustrating the embodiments, certain elements of the drawings may be omitted, enlarged or reduced and do not represent the actual product dimensions; it will be appreciated by those skilled in the art that certain well-known structures in the drawings and descriptions thereof may be omitted. The positional relationship depicted in the drawings is for illustrative purposes only and is not to be construed as limiting the present patent.
As shown in fig. 2 and 3, the present invention provides a device for measuring and testing the operation force of a parking system 4 of a hybrid electric drive assembly, which is fixed on the parking system 4, and comprises:
a transition plate 3, wherein the transition plate 3 is arranged on the top surface of a parking motor 41 of the parking system 4 and is contacted with an upper shell of the parking motor 41;
a pull pressure sensor 1, wherein the pull pressure sensor 1 is arranged on the top surface of the transition plate 3 and is contacted with the transition plate; and
a pressing fixing structure 2, wherein the pressing fixing structure 2 is used for fixing the tension pressure sensor 1 and pressing the transition plate 3 downwards; wherein, the transition plate 3 can timely transmit the operation reaction force of the parking motor 41 to the pull pressure sensor 1. (although there is a loss of force, the measured value is greater than the normal value, since the invention requires that the measured force must not be less than a certain value, the loss of force should be less than 1% according to the mechanical manual, which can be ignored)
Wherein the pressing and fixing structure 2 comprises a fixing component 21 for fixing the tension pressure sensor 1 and a pressing component 22 for supporting and fixing the fixing component 21.
In a specific implementation, the fixing assembly 21 includes an upper end cover 211 and a fixing bolt 212, and the fixing bolt 212 passes downward through the upper end cover 211 to be screwed with the pull pressure sensor 1. Preferably, the upper end cover 211 has a disc-shaped structure, and the planar areas of the upper end cover 211 are respectively larger than the cross-sectional areas of the pull pressure sensor 1, the transition plate 3 and the parking motor 41, so that the upper end cover 211 can provide enough space for the installation of the support rods 221, the support rods 221 are arranged around the pull pressure sensor 1 at intervals, and gaps (as shown in fig. 4) are formed between the support rods 221 and the pull pressure sensor 1, the transition plate 3 and the parking motor 41, thereby eliminating the influence of friction force on the operation force test of the parking system 4 of the electric drive assembly.
In a specific implementation, the pressing component 22 includes a plurality of support rods 221 with external threads at two ends, the upper ends of the support rods 221 pass through the upper end cover 211 upwards and are fastened and connected by fixing nuts 222, and the lower ends of the support rods are fastened and connected with existing screw holes 223 on the electric drive assembly housing 42 of the parking system 4. The existing screw hole 223 on the electric drive assembly housing 42 is originally the mounting point of the bracket for fixing the drive motor, the existing screw hole 223 is directly utilized at present (the drive motor passes through the hole site of the housing, is fixed in position by the support rod 221, is clamped between the electric drive assembly housing and the pressure sensor, and ensures that the position of the drive motor is fixed) to fix the support rod 221, thereby providing basic support for the whole test device, being convenient and quick and saving cost.
Since the top surface of the driving motor is not flat, in order to enable the transition plate 3 to receive the reaction force of the driving motor more accurately, the transition plate 3 includes a cross plate 31 that completely covers the bottom of the pull pressure sensor 1 and a vertical plate 32 that extends downward along the bottom of the cross plate 31 to form contact with the upper case of the parking motor 41.
Based on the structure of the test device, the invention provides a test method of an operation force measurement test device of a passenger car parking system 4, which comprises the following steps:
s1, performing system assembly on a parking motor 41, an electric drive assembly shell 42, a parking ratchet wheel 43 and a parking module 44 according to design requirements to obtain a test object parking system 4;
s2, fixedly assembling the test device on a test object parking system 4;
s3, starting the parking system 4, transmitting the reaction force received by the parking motor 41 to the tension pressure sensor 1 through the transition plate 3, and indirectly obtaining the magnitude of the operation force of the parking system 4 by reading the value of the tension pressure sensor 1.
As shown in fig. 5, the O-ring 411 of the parking motor 41 needs to be removed before the parking system 4 operation force test is performed. (the structure shown in FIG. 5 is a mounting joint surface when the parking motor is mounted on the electric drive assembly, the parking motor is provided with a groove for mounting the O-ring, so that oil leakage is prevented, but the experiment does not need oiling, and in the process of testing the operating force, the O-ring generates friction force, so that the measured value of the operating force is reduced, and the O-ring is removed)
The test principle of the test method of the invention is as follows: when the push rod of the parking motor 41 pushes down the parking module 44 without considering the friction force, the parking module 44 gives the parking motor 41 an equal force in the upward direction by the Newton's third law, and the force is transmitted to the tension pressure sensor 1 through the transition plate 3, so that the magnitude of the force of the push rod of the parking motor 41 pushing down the parking module 44 can be indirectly obtained by reading the value of the tension pressure sensor 1.
The above is only a preferred embodiment of the present invention, but the present invention is not limited to the above-described specific embodiment. Modifications, additions, or substitutions are possible, without departing from the scope of the invention as disclosed in the accompanying claims.
Claims (5)
1. A passenger car parking system operating force measurement test device, characterized in that the test device is fixed to the parking system (4), comprising:
the transition plate (3) is arranged on the top surface of a parking motor (41) of the parking system (4) and is in contact with the upper shell of the parking motor (41);
the tension and pressure sensor (1) is arranged on the top surface of the transition plate (3) and is contacted with the transition plate (3); and
the compression fixing structure (2) is used for fixing the tension pressure sensor (1) and compressing the transition plate (3) downwards;
the transition plate (3) can timely transmit the operation reaction force of the parking motor (41) to the tension pressure sensor (1);
the pressing and fixing structure (2) comprises a fixing component (21) for fixing the tension pressure sensor (1) and a pressing component (22) for applying downward acting force to the fixing component (21);
the fixing assembly (21) comprises an upper end cover (211) and a fixing bolt (212), and the fixing bolt (212) penetrates through the upper end cover (211) downwards to be in threaded connection with the tension pressure sensor (1);
the pressing component (22) comprises a plurality of supporting rods (221) with external threads at two ends, the upper ends of the supporting rods (221) upwards penetrate through the upper end cover (211) and are fastened and connected by fixing nuts (222), and the lower ends of the supporting rods are fastened and connected with existing screw holes (223) on an electric drive assembly shell (42) of the parking system (4);
the test method of the passenger car parking system operation force measurement test device comprises the following steps:
s1, performing system assembly on a parking motor (41), an electric drive assembly shell (42), a parking ratchet wheel (43) and a parking module (44) according to design requirements to obtain a test object parking system (4);
s2, fixedly assembling the test device on a test object parking system (4);
s3, starting the parking system (4), transmitting the reaction force received by the parking motor (41) to the tension pressure sensor (1) through the transition plate (3), and indirectly obtaining the operation force of the parking system (4) by reading the value of the tension pressure sensor (1).
2. The passenger car parking system operation force measurement test apparatus according to claim 1, wherein: the upper end cover (211) is of a disc-shaped structure, and the plane area of the upper end cover is respectively larger than the cross section area of the pull pressure sensor (1), the cross section area of the transition plate (3) and the cross section area of the parking motor (41).
3. The passenger car parking system operation force measurement test apparatus according to claim 1, wherein: the support rods (221) are arranged around the tension pressure sensor (1) at intervals, and gaps are reserved among the support rods (221), the tension pressure sensor (1), the transition plate (3) and the parking motor (41).
4. The passenger car parking system operation force measurement test apparatus according to claim 1, wherein: the transition plate (3) comprises a transverse plate (31) which completely covers the bottom of the tension and pressure sensor (1) and a vertical plate (32) which extends downwards along the bottom of the transverse plate (31) to form contact with the upper shell of the parking motor (41).
5. The passenger car parking system operation force measurement test apparatus according to claim 1, wherein: the O-ring (411) of the parking motor (41) needs to be removed before the operation force test of the parking system (4) is performed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210320590.0A CN114705344B (en) | 2022-03-29 | 2022-03-29 | Device and method for measuring and testing operation force of parking system of passenger car |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210320590.0A CN114705344B (en) | 2022-03-29 | 2022-03-29 | Device and method for measuring and testing operation force of parking system of passenger car |
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| Publication Number | Publication Date |
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| CN114705344A CN114705344A (en) | 2022-07-05 |
| CN114705344B true CN114705344B (en) | 2023-12-26 |
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| CN202210320590.0A Active CN114705344B (en) | 2022-03-29 | 2022-03-29 | Device and method for measuring and testing operation force of parking system of passenger car |
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| CN114705344A (en) | 2022-07-05 |
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