CN110763124A - Rapid detection system and detection method for flatness and coaxiality of automobile steering wheel - Google Patents

Abstract

The invention discloses a rapid detection system for the flatness and coaxiality of an automobile steering wheel, and relates to the technical field of automobile steering wheel detection. A leveling reference component is fixedly installed at the geometric center of The horizontal bearing base surface, when the whole device is placed on the bearing base surface that is not originally horizontal, the staff adjusts the leveling mechanism and uses the leveling reference assembly as the basis for whether the entire equipment is in a horizontal state, so that the entire equipment is in a horizontal state. It is always in a horizontal state before and during the detection, which is beneficial to improve the detection of the flatness and coaxiality of the steering wheel, and to improve the accuracy of the data.

Description

Rapid detection system and detection method for flatness and coaxiality of automobile steering wheel

technical field

The invention relates to the technical field of automobile steering wheel detection, in particular to a rapid detection system and a detection method for the flatness and coaxiality of an automobile steering wheel.

Background technique

The definition of inspection tool is mainly summarized as a simple tool used by manufacturers to control various dimensions of products (such as aperture, space size, etc.), improve production efficiency and control quality, and is suitable for mass-produced products, such as auto parts, to Replace professional measuring tools, such as calipers, thread plug gauges, outer diameter calipers, etc. Designing a inspection tool needs to have an obvious feature, that is, it has adjustability. Most parts can be adjusted to meet the detection of different types of products, and high accuracy needs to be guaranteed.

Vehicle handling refers to the results achieved by the operation of the direction, brakes, accelerators, various technical and conditional configurations of the vehicle, and the driver's pre-judgment when the vehicle is running due to the vehicle's own problems or external factors. Differences in the degree of purpose required. The main factors affecting the handling performance are power, suspension and steering system, and the steering wheel, as an important structure of the steering system, can be said to be an important factor affecting the handling.

The steering wheel is a wheel-shaped device that controls the direction of travel. It is generally connected to the steering shaft through splines. Its main function is to convert the force exerted by the driver on the edge of the steering wheel into torque and then transmit it to the steering shaft. The steering wheel provided by this design All are steering wheel skeleton, excluding foam material. The general process of the steering wheel frame is die-casting. As an important device in the form of manipulation, there are two important parameters that can directly affect the entire performance of the steering wheel. One is the flatness of the steering wheel itself. If the edge of the steering wheel disc does not have a good flatness, it will greatly affect the control and steering accuracy of the entire car. influences. Another important parameter is the coaxiality between the steering wheel and the steering shaft. Since the steering wheel and the steering shaft are connected by splines, if the coaxiality of the two does not match, it will easily lead to failure of assembly.

After searching, the Chinese patent discloses a detection device for the flatness and coaxiality of a steering wheel (publication number CN106091874B). A shaft detector, a plurality of plane detectors, a support plate and a support shaft on the support plate, a rotating body is arranged between the support shaft and the coaxial detector, and the rotating body is connected with the plane detector through a radius adjusting arm , a pressure sensor is arranged on the plane detector, and a support body is arranged between the support plate and the fixed plate; the invention has simple operation, strong versatility and high precision.

In the above-mentioned patent content and the devices for detecting the flatness of automobile steering wheel in the prior art, there are the following deficiencies, resulting in inaccurate data for actually detecting the flatness of the steering wheel:

1. The main problem of the above-mentioned patent is that there is a lack of leveling processing for the entire device before detection. If the detection device itself cannot be guaranteed to be in a horizontal state, the data obtained from the flatness detection in the later direction is also inaccurate. ;

2. The second problem of the above patent is that the pressure sensor is used to transmit the value to determine whether the threshold of the flatness of the steering wheel in the placed state is within the specified range. However, when one steering wheel is placed on three load-bearing carriers, the three The load-bearing carrier will share the weight of the steering wheel, instead of the phenomenon that the pressure values transmitted by the corresponding pressure sensors in the three load-bearing carriers are different due to the flatness problem of the steering wheel itself. Therefore, there is a problem of inaccurate data, and the use of The cost of pressure sensors is high.

To sum up, those skilled in the art have proposed a rapid detection system and detection method for the flatness and coaxiality of an automobile steering wheel.

SUMMARY OF THE INVENTION

Aiming at the deficiencies of the prior art, the present invention provides a rapid detection system and a detection method for the flatness and coaxiality of an automobile steering wheel, which solves the problem of the existing steering wheel flatness and coaxiality detection device, which cannot be ensured in the overall detection during detection. Level status and there are problems with inaccurate detection data.

In order to achieve the above purpose, the present invention is achieved through the following technical solutions: a rapid detection system for the flatness and coaxiality of an automobile steering wheel, including an equipment carrying base, the equipment carrying base is a cuboid and has a hollow structure inside, and the equipment A leveling mechanism is correspondingly installed at the four corners of the rectangular end face of the bottom of the bearing base. The top end face of the equipment bearing base is fixed and installed with a matching bearing panel by bolts. The geometry of the top end face of the bearing panel A leveling reference assembly is fixedly installed in the center position, and a steering wheel fixing mechanism is fixedly installed on the top end face of the bearing panel at a position just above the leveling reference assembly, and the top end face of the bearing panel is located at the outer side of the middle section of the steering wheel fixing mechanism The flatness reference assembly is fixedly installed at the position, and the steering wheel assembly is fixedly clamped on the top end face of the steering wheel fixing mechanism.

Preferably, the leveling mechanism includes an inner thread cylinder fixedly installed at the four corners of the rectangular end face of the bottom of the equipment carrying base, the inner thread cylinder is rotatably connected with a threaded column through a thread, and the middle part of the thread column is threaded. The threaded section is rotatably connected with a fine-tuning nut, and the section with no thread at the bottom of the threaded column is fixedly sleeved with a tightening nut through welding, and the bottom end of the threaded column is fixedly connected with a welding method. bottom foot.

Preferably, the leveling reference assembly includes a water storage box fixedly installed at the geometric center position of the top end face of the bearing panel, the interior of the water storage box contains liquid water, and the top end face of the water storage box is screwed with A sealing cap, the top end face of the sealing cap is embedded and fixedly installed with a viewing window, and the top end face of the viewing window is provided with a leveling reference line.

Preferably, the liquid surface of the liquid water is not in contact with the inner top of the sealing cap, and there are air bubbles in the gap between the two.

Preferably, the flatness reference assembly includes two supporting columns fixedly mounted on the top end surfaces of the bearing panel, the top end surfaces of the two supporting columns are jointly connected with a hollow disk body in the middle, and the top end surfaces of the disk body are connected together. A scribed paper is fixed and connected by gluing.

Preferably, the steering wheel fixing mechanism includes a chassis, the top end surface of the chassis is fixedly connected with the bottom end of the bearing column, the top end surface of the bearing column is fixedly installed with a coaxial detection component, and the top end of the coaxial detection component is movable A detachable handheld marking mechanism is connected, the side walls of the chassis are respectively connected with three supporting feet, the top edge side of each supporting foot is correspondingly connected with a supporting vertical plate, and the tops of the three supporting vertical plates are fixedly installed There are support fixtures.

Preferably, the coaxial detection assembly includes a coaxial detector whose bottom end is fixedly mounted on the top of the bearing column, and a connecting column is fixedly mounted on the top end face of the coaxial detector.

The hand-held scribing mechanism includes a base plate movably connected to the top end surface of the connecting column, a movable and detachable connection structure is formed between the base plate and the connecting column through a bearing seat, and the top end surface of the base plate is fixedly connected with one end of the transmission plate , a marker pen is fixedly connected inside the other end of the transmission plate, and a handle is fixedly connected to the upper surface of one end of the transmission plate.

Preferably, the holding and fixing assembly includes a bracket for fixing and supporting the top end surface of the vertical plate, the top end surface of the bracket is fixedly connected with a fixed splint with an "L" shape structure, and one side of the fixed splint is respectively provided with a movable splint and a fixed splint. A cylinder, the driving end of the cylinder is fixedly connected with a movable splint, the fixed splint and the movable splint are connected by a chute, and the adjacent end faces of the fixed splint and the movable splint are provided with protective pads.

Preferably, the steering wheel assembly includes a holding ring that is fixedly clamped and disposed on the top of the steering wheel fixing mechanism, an auxiliary plate is fixedly connected to the inner side wall of the holding ring, and a connecting shaft is fixedly connected to the center of the auxiliary plate. set.

The present invention also relates to the detection method of the above-mentioned rapid detection system for the flatness and coaxiality of the steering wheel of the automobile, comprising the following steps:

S1. Equipment leveling: Use the leveling mechanism and the leveling reference component to level the entire equipment. During leveling, the operator uses a wrench to turn the tightening nut, so that the tightening nut drives the threaded column and the foot to rotate. During the rotation of the threaded column, the distance between the fine-tuning nut and the inner wire cylinder can be adjusted. During the adjustment process, the operator needs to observe whether the air bubble is in the center of the leveling reference line. When the air bubble is in the leveling reference line After the inner center of the device is located, stop the leveling operation, so as to ensure that the entire equipment is always in a horizontal state during the inspection process;

S2. Fixing the steering wheel: Put the entire steering wheel assembly into the clamping sections of the three holding and fixing components. When placing, it is not only necessary to ensure that the connecting shaft sleeve is sleeved on the outside of the coaxial detector, but also to ensure that the holding rings are all located in In the clamping cavity between the fixed splint and the movable splint in the three holding and fixing assemblies, the cylinder is then actuated to clamp and fix the entire steering wheel assembly;

S3. Place the hand-held scribing mechanism: After the steering wheel assembly in step S2 is fixed, one end of the entire hand-held scribing mechanism is sleeved on the outside of the entire connecting column, and a bearing seat is used to form the hand-held scribing mechanism and the connecting column. Detachable rotating structure;

S4. Coaxiality detection: The coaxial detector is a cylindrical structure, which can simulate the connection between the steering shaft of the automobile and the connecting sleeve, and judge the coaxiality of the steering wheel by whether the cylinder can pass through the connecting sleeve. ;

S5. Flatness detection: After the entire hand-held marking mechanism in step S3 is placed, adjust the distance between the tip of the marker and the marking paper to ensure that the tip of the marking pen is just in contact with the upper surface of the marking paper, and then the operator Hold the handle, twist the handle in one direction, and let the handle drive the transmission plate to rotate with the handle as the axis. During the rotation of the transmission plate, the bottom end face of the transmission plate is always in contact with the upper surface of the holding ring, and then the transmission The board drives the marker pen to make a circular motion, so that the tip of the marker pen draws a circular detection line on the upper surface of the scribed paper, and the circular detection line is used as the trajectory line left by the marker pen during the circular motion;

S6, flatness judgment: according to the circular detection line drawn on the upper surface of the scribed paper in step S5, observe whether the circular detection line has sections with different shades and broken sections, and the colors are lighter and broken. The open sections all represent that the section of the steering wheel corresponding to this position is higher, and the flatness of the corresponding steering wheel is lower, and the detection of the flatness of the steering wheel can be completed.

beneficial effect

The invention provides a rapid detection system and detection method for the flatness and coaxiality of automobile steering wheel. Compared with the prior art, it has the following beneficial effects:

1. The rapid detection system for the flatness and coaxiality of the steering wheel of the car. First, a leveling mechanism is installed at the four corners of the rectangular end face at the bottom of the equipment bearing base. The top end face of the equipment bearing base is fixed by bolts. A matching bearing panel is installed, and a leveling reference component is fixed at the geometric center of the top end face of the bearing panel. During the actual operation, the leveling mechanism and the leveling reference component are used in cooperation with each other. The leveling mechanism can adjust the height of itself to deal with the bearing base that is not originally horizontal. When the whole device is placed on the bearing base that is not originally horizontal, the staff can adjust the leveling mechanism and use the leveling reference component. As the basis for whether the entire device is in a horizontal state, the entire device is always in a horizontal state before and during the detection process, which is conducive to improving the detection of steering wheel flatness and coaxiality, and improving the accuracy of data.

2. The rapid detection system for the flatness and coaxiality of the automobile steering wheel, when detecting the flatness of the steering wheel, the operator takes the axis of the steering wheel as the center of the circle, and indirectly drives the marker pen to draw a circle on the scribed paper. When the marker pen draws a circle, the lower surface of the transmission plate is always in contact with the upper surface of the steering wheel holding ring. Therefore, when the flatness of the steering wheel holding ring changes, the distance between the tip of the marker pen and the scribed paper. There will be slight contact or no contact between them. Slight contact will cause the arc drawn by the marker pen in this section to be lighter in color. Draw the disconnection of the circular trajectory to judge whether the flatness of the entire steering wheel is qualified.

Description of drawings

Fig. 1 is the structural representation of the present invention;

2 is a schematic structural diagram of the present invention after the steering wheel assembly is removed;

Fig. 3 is the structural schematic diagram of the leveling mechanism of the present invention;

4 is a schematic structural diagram of a leveling reference assembly of the present invention;

5 is a schematic structural diagram of a flatness reference assembly of the present invention;

6 is a schematic structural diagram of a steering wheel fixing mechanism of the present invention;

7 is a schematic structural diagram of a coaxial detection assembly of the present invention;

Fig. 8 is the structural representation of the hand-held scribing mechanism of the present invention;

9 is a schematic structural diagram of a holding and fixing assembly of the present invention;

FIG. 10 is a schematic structural diagram of the steering wheel assembly of the present invention.

In the figure: 1. Equipment carrying base; 2. Leveling mechanism; 21. Inner thread cylinder; 22. Threaded column; 23. Fine-tuning nut; 24. Fastening nut; 25. Foot; 3. Bearing panel; 4. Leveling reference assembly; 41, water storage box; 42, liquid water; 43, air bubble; 44, sealing cap; 45, viewing window; 46, leveling reference line; 5, flatness reference assembly; 51, support column; 52 , plate body; 53, marking paper; 6, steering wheel fixing mechanism; 61, chassis; 62, feet; 63, bearing column; 64, coaxial detection component; 641, coaxial detector; 642, connecting column; 65, Hand-held marking mechanism; 651, base plate; 652, bearing seat; 653, transmission plate; 654, handle; 655, marker; 66, support vertical plate; 67, support and fix component; 671, bracket; 672, fixed splint; 673 , Moving splint; 674, cylinder; 675, protective pad; 7, steering wheel assembly; 71, holding ring; 72, auxiliary plate; 73, connecting shaft sleeve.

Detailed ways

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, but not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

1-2, the present invention provides a technical solution: a rapid detection system for the flatness and coaxiality of a steering wheel of an automobile, comprising an equipment carrying base 1, the equipment carrying base 1 is a cuboid and has a hollow interior structure, and the equipment carrying A leveling mechanism 2 is correspondingly installed at the four corners of the rectangular end face at the bottom of the base 1. The top end face of the equipment carrying base 1 is fixed with a matching bearing panel 3 by bolts. The geometry of the top end face of the bearing panel 3 The leveling reference assembly 4 is fixedly installed in the center position, and the top end face of the bearing panel 3 is located directly above the leveling reference assembly 4. A steering wheel fixing mechanism 6 is fixedly installed, and the top end face of the bearing panel 3 is located in the middle of the steering wheel fixing mechanism 6 The flatness reference assembly 5 is fixedly installed at the outer position of the section, and the steering wheel assembly 7 is fixedly clamped on the top end face of the steering wheel fixing mechanism 6 .

Please refer to FIG. 3 , the leveling mechanism 2 includes an inner thread cylinder 21 fixedly installed at the four corners of the rectangular end face at the bottom of the equipment carrying base 1 , and the inner thread cylinder 21 is rotatably connected with a threaded post 22 through a thread. The threaded section in the middle of 22 is rotatably connected with a fine-tuning nut 23, and the section without thread at the bottom of the threaded column 22 is fixed and sleeved with a tightening nut 24 by welding, and the bottom end of the threaded column 22 is welded. The way is fixedly connected with the foot 25 .

Referring to FIG. 4 , the leveling reference assembly 4 includes a water storage box 41 fixedly installed at the geometric center position of the top end face of the bearing panel 3 . The interior of the water storage box 41 contains liquid water 42 , and the top end face of the water storage box 41 is threaded A sealing cap 44 is connected, the top end face of the sealing cap 44 is embedded and fixedly installed with a viewing window 45, the top end face of the viewing window 45 is provided with a leveling reference scribe 46, and the liquid level of the liquid water 42 is not in contact with the inner top of the sealing cap 44. Contact, there is a bubble 43 in the gap between the two.

Please refer to FIG. 5 , the flatness reference assembly 5 includes two supporting columns 51 fixedly installed on the top end face of the bearing panel 3 , and the top end faces of the two supporting columns 51 are jointly connected with a hollow disk body 52 in the middle. A piece of marking paper 53 is fixedly connected to the top end face by gluing.

Please refer to FIG. 6 , the steering wheel fixing mechanism 6 includes a chassis 61 , the top end surface of the chassis 61 is fixedly connected to the bottom end of the bearing column 63 , the top end surface of the bearing column 63 is fixedly installed with a coaxial detection component 64 , and the top end of the coaxial detection component 64 is fixedly installed. A detachable hand-held marking mechanism 65 is movably connected, the side walls of the chassis 61 are respectively connected with three legs 62, and the top edge side of each leg 62 is correspondingly connected with a supporting vertical plate 66, and the top of the three supporting vertical plates 66 is connected Both are fixedly installed with a holding and fixing assembly 67 .

Referring to FIG. 7 , the coaxial detection assembly 64 includes a coaxial detector 641 whose bottom end is fixedly mounted on the top of the bearing column 63 , and a connecting column 642 is fixedly mounted on the top end surface of the coaxial detector 641 .

Please refer to FIG. 8 , the hand-held scribing mechanism 65 includes a base plate 651 movably connected to the top end surface of the connecting column 642 , a movable and detachable connection structure is formed between the base plate 651 and the connecting column 642 through the bearing seat 652 , and the top end surface of the base plate 651 is fixed One end of the transmission plate 653 is connected, the other end of the transmission plate 653 is fixedly connected with a marker 655, and the upper surface of one end of the transmission plate 653 is fixedly connected with a handle 654.

Please refer to FIG. 9 , the holding and fixing assembly 67 includes a bracket 671 for fixing and supporting the top end surface of the vertical plate 66 , and the top end surface of the bracket 671 is fixedly connected with a fixed splint 672 with an “L”-shaped structure, and one side of the fixed splint 672 is respectively provided with movable The splint 673 and the cylinder 674, the driving end of the cylinder 674 is fixedly connected with the movable splint 673, the fixed splint 672 and the movable splint 673 are connected by a chute, and the adjacent end faces of the fixed splint 672 and the movable splint 673 are provided with protective pads 675 .

Please refer to FIG. 10 , the steering wheel assembly 7 includes a holding ring 71 fixedly clamped on the top of the steering wheel fixing mechanism 6 , an auxiliary plate 72 is fixedly connected to the inner side wall of the holding ring 71 , and a central position of the auxiliary plate 72 is fixedly connected with Connect the shaft sleeve 73 .

The present invention also relates to the detection method of the above-mentioned rapid detection system for the flatness and coaxiality of the steering wheel of the automobile, comprising the following steps:

S1. Equipment leveling: Use the leveling mechanism 2 and the leveling reference assembly 4 to level the entire equipment. During leveling, the operator uses a wrench to turn the tightening nut 24, so that the tightening nut 24 drives the threaded column 22 and the The foot 25 rotates. During the rotation of the threaded column 22, the distance between the fine adjustment nut 23 and the inner thread cylinder 21 can be adjusted. In the center position, when the air bubble 43 is located at the inner center of the leveling reference line 46, the leveling operation is stopped, thereby ensuring that the entire equipment is always in a horizontal state during the detection process;

S2. Fixing the steering wheel: Put the entire steering wheel assembly 7 into the clamping sections of the three holding and fixing assemblies 67. When placing, it is necessary not only to ensure that the connecting shaft sleeve 73 is sleeved outside the coaxial detector 641, but also to ensure that The holding rings 71 are all located in the clamping cavity between the fixed splint 672 and the movable splint 673 in the three holding and fixing assemblies 67, and then the cylinder 674 is actuated to clamp and fix the entire steering wheel assembly 7;

S3, placing the hand-held scribing mechanism 65: after the steering wheel assembly 7 in step S2 is fixed, one end of the entire hand-held scribing mechanism 65 is sleeved on the outside of the entire connecting column 642, and the hand-held scribing mechanism 65 is formed by means of the bearing seat 652. A detachable rotating structure with the connecting column 642;

S4. Coaxiality detection: The coaxial detector 641 is a cylindrical structure, which can simulate the connection between the steering shaft of the automobile and the connecting shaft sleeve 73 , and judge the degree of the steering wheel by whether the cylinder can pass through the connecting shaft sleeve 73 or not. Concentricity;

S5, flatness detection: after the entire hand-held marking mechanism 65 in step S3 is placed, adjust the distance between the tip of the marker 655 and the marking paper 53 to ensure that the tip of the marking pen 655 and the upper surface of the marking paper 53 are just right Then the operator holds the handle 654 and twists the handle 654 in one direction, so that the handle 654 drives the transmission plate 653 to rotate around the handle 654. During the rotation of the transmission plate 653, the bottom end face of the transmission plate 653 is always in contact with The upper surface of the holding ring 71 is in contact with each other, and then, the transmission plate 653 drives the marker 655 to make a circular motion, so that the tip of the marker 655 draws a circular detection line on the upper surface of the marking paper 53, and the circular detection line is used as a circular detection line. The trajectory line left by the marker pen 655 during the circular motion;

S6, flatness judgment: according to the circular detection line drawn on the upper surface of the scribed paper 53 in step S5, observe whether the circular detection line has sections with different shades and disconnected sections, and the colors are lighter and The disconnected sections all represent that the section of the steering wheel corresponding to the position is higher, and the flatness of the corresponding steering wheel is lower, and the detection of the flatness of the steering wheel can be completed.

It should be noted that, in this document, relational terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any relationship between these entities or operations. any such actual relationship or sequence exists. Moreover, the terms "comprising", "comprising" or any other variation thereof are intended to encompass a non-exclusive inclusion such that a process, method, article or device that includes a list of elements includes not only those elements, but also includes not explicitly listed or other elements inherent to such a process, method, article or apparatus.

Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, and substitutions can be made in these embodiments without departing from the principle and spirit of the invention and modifications, the scope of the present invention is defined by the appended claims and their equivalents.

Claims (10)

1. A rapid detection system for the flatness and coaxiality of an automobile steering wheel, comprising an equipment carrying base (1), characterized in that the equipment carrying base (1) is a cuboid and has a hollow structure inside, and the equipment carrying base (1) is a hollow structure. A leveling mechanism (2) is correspondingly installed at the four corners of the rectangular end surface of the bottom of the seat (1), and a matching bearing panel (3) is installed on the top end surface of the equipment carrying base (1) through bolts. ), the leveling reference assembly (4) is fixedly installed at the geometric center position of the top end face of the bearing panel (3), and the top end face of the bearing panel (3) is fixedly installed at the position just above the leveling reference assembly (4). There is a steering wheel fixing mechanism (6), a flatness reference assembly (5) is fixedly installed on the top end face of the bearing panel (3) and is located at the outer position of the middle section of the steering wheel fixing mechanism (6), and the steering wheel fixing mechanism ( The top end face of 6) is fixedly clamped with a steering wheel assembly (7). 2 . The rapid detection system for the flatness and coaxiality of an automobile steering wheel according to claim 1 , wherein the leveling mechanism ( 2 ) comprises four rectangular end faces fixedly installed on the bottom of the equipment carrying base ( 1 ). 3 . The inner thread cylinder (21) at the corner, the interior of the inner thread cylinder (21) is rotatably connected with a threaded post (22) by means of a thread, and the threaded section in the middle of the thread post (22) is rotatably connected with a thread. The fine-tuning nut (23), and the section without thread at the bottom of the threaded post (22), is fixedly sleeved with a tightening nut (24) by welding, and the bottom end of the threaded post (22) is welded by means of welding. The fixed connection has feet (25). 3. The rapid detection system for the flatness and coaxiality of an automobile steering wheel according to claim 1, wherein the leveling reference assembly (4) comprises a A water storage box (41), the interior of the water storage box (41) contains liquid water (42), the top end surface of the water storage box (41) is threadedly connected with a sealing cap (44), the sealing A viewing window (45) is embedded and fixedly installed on the top end face of the cap (44), and a leveling reference scribe line (46) is provided on the top end face of the viewing window (45). 4. The rapid detection system for the flatness and coaxiality of an automobile steering wheel according to claim 3, wherein the liquid level of the liquid water (42) does not contact the inner top of the sealing cap (44), and the two There are air bubbles (43) in the space between them. 5 . The rapid detection system for the flatness and coaxiality of an automobile steering wheel according to claim 1 , wherein the flatness reference assembly ( 5 ) comprises two supports fixedly mounted on the top end face of the bearing panel ( 3 ). 6 . Uprights (51), the top end faces of the two supporting uprights (51) are jointly connected with a hollow disk body (52) in the middle, and the top end faces of the disk body (52) are fixedly connected by gluing. Line Paper (53). 6. The rapid detection system for the flatness and coaxiality of an automobile steering wheel according to claim 1, wherein the steering wheel fixing mechanism (6) comprises a chassis (61), and the top end surface of the chassis (61) is fixed The bottom end of the bearing column (63) is connected, the top end face of the bearing column (63) is fixedly installed with a coaxial detection component (64), and the top end of the coaxial detection component (64) is movably connected with a detachable handheld The scribing mechanism (65), the side walls of the chassis (61) are respectively connected with three supporting feet (62), the top edge side of each supporting foot (62) is correspondingly connected with a supporting vertical plate (66), the three The top end of the supporting vertical plate (66) is fixedly installed with a supporting and fixing component (67). 7 . The rapid detection system for the flatness and coaxiality of an automobile steering wheel according to claim 6 , wherein the coaxial detection component (64) comprises a coaxial whose bottom end is fixedly installed on the top of the bearing column (63). 8 . a detector (641), the top end face of the coaxial detector (641) is fixedly installed with an engagement post (642); The hand-held scribing mechanism (65) includes a base plate (651) movably connected to the top end face of the engagement post (642), and the base plate (651) and the engagement post (642) are movable and movable through the bearing seat (652). In the detachable connection structure, one end of the transmission plate (653) is fixedly connected to the top end face of the base plate (651), and a marker (655) is fixedly connected inside the other end of the transmission plate (653). 653) A handle (654) is fixedly connected to the upper surface of one end. 8 . The rapid detection system for the flatness and coaxiality of an automobile steering wheel according to claim 6 , wherein the holding and fixing assembly ( 67 ) comprises a bracket ( 671 ) for fixing and supporting the top end face of the vertical plate ( 66 ). 9 . , the top end face of the bracket (671) is fixedly connected with a fixed splint (672) with an "L"-shaped structure, and one side of the fixed splint (672) is respectively provided with a movable splint (673) and a cylinder (674), so The driving end of the cylinder (674) is fixedly connected with a movable splint (673), the fixed splint (672) and the movable splint (673) are connected by a chute, and the fixed splint (672) and the movable splint (673) are connected. Adjacent end faces are provided with protective pads (675). 9 . The rapid detection system for the flatness and coaxiality of an automobile steering wheel according to claim 1 , wherein the steering wheel assembly ( 7 ) comprises a holding ring that is fixedly clamped and arranged on the top of the steering wheel fixing mechanism ( 6 ). 10 . (71), an auxiliary plate (72) is fixedly connected to the inner side wall of the holding ring (71), and a connecting shaft sleeve (73) is fixedly connected through the center of the auxiliary plate (72). 10. A detection method for a rapid detection system for the flatness and coaxiality of an automobile steering wheel, characterized in that it comprises the following steps: S1. Equipment leveling: Use the leveling mechanism (2) and the leveling reference assembly (4) to level the entire equipment. When leveling, the operator uses a wrench to turn the tightening nut (24) to let the tightening nut (24) Drive the threaded column (22) and the foot (25) to rotate. During the rotation of the threaded column (22), the distance between the fine adjustment nut (23) and the inner thread cylinder (21) can be adjusted. During the process, the operator needs to observe whether the air bubble (43) is located in the center of the leveling reference line (46). Ensure that the entire equipment is always in a horizontal state during the detection process; S2. Fixing the steering wheel: Put the entire steering wheel assembly (7) into the clamping sections of the three holding and fixing assemblies (67). When placing, it is not only necessary to ensure that the connecting shaft sleeve (73) is sleeved on the coaxial detector (641). ), and make sure that the holding rings (71) are located in the clamping cavity between the fixed clamping plate (672) and the movable clamping plate (673) in the three clamping and fixing assemblies (67), and then let the cylinder (674) action to clamp and fix the entire steering wheel assembly (7); S3. Place the hand-held scribing mechanism (65): after the steering wheel assembly (7) in step S2 is fixed, one end of the entire hand-held scribing mechanism (65) is sleeved on the outside of the entire connecting column (642), with the help of the bearing seat (652), forming a detachable rotating structure between the hand-held marking mechanism (65) and the connecting column (642); S4. Coaxiality detection: The coaxial detector (641) is a cylindrical structure, which can simulate the connection between the steering shaft of the automobile and the connecting sleeve (73), and whether the cylinder can pass through the connecting sleeve (73) ) to judge the coaxiality of the steering wheel; S5. Flatness detection: After the entire hand-held marking mechanism (65) in step S3 is placed, adjust the distance between the tip of the marker (655) and the marking paper (53) to ensure that the tip of the marker (655) is the same as the marking paper (53). The upper surface of the marking paper (53) just touches, and then the operator holds the handle (654) and twists the handle (654) in one direction, so that the handle (654) drives the drive plate (653) with the handle (654) as the axis When the heart rotates, during the rotation of the transmission plate (653), the bottom end face of the transmission plate (653) is always in contact with the upper surface of the holding ring (71). Then, the transmission plate (653) drives the marker (655) to make Circular motion, let the tip of the marker pen (655) draw a circular detection line on the upper surface of the marking paper (53), the circular detection line is used as the track line left by the marker pen (655) during the circular motion ; S6, flatness judgment: according to the circular detection line drawn on the upper surface of the scribed paper (53) in step S5, observe whether the circular detection line has sections with different shades and disconnected sections, and the color is more The shallow and disconnected sections all represent that the section of the steering wheel corresponding to the position is higher, and the flatness of the corresponding steering wheel is lower, and the detection of the flatness of the steering wheel can be completed.

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