CN116202446A - Angle measuring device and angle measuring method - Google Patents

Abstract

The invention relates to an angle measuring device and an angle measuring method, the angle measuring device comprises: the mounting bracket is used for mounting the front shaft; the first calibration plate is arranged on the first hub, and the second calibration plate is arranged on the second hub; and the two measuring pieces are arranged at intervals along the second direction, and each measuring piece is configured to be capable of simultaneously emitting measuring light to the first calibration plate and the second calibration plate so as to acquire the distances between the reference plane and the first calibration plate and the second calibration plate along the first direction. According to the angle measuring device, the measuring light emitted by the measuring piece obtains the distances between the reference plane and the first calibration plate and the second calibration plate along the first direction respectively, and the maximum rotation angle of the front shaft is determined through calculation, so that the measuring precision is improved; the measuring piece can simultaneously emit measuring light to the first calibration plate and the second calibration plate so as to simultaneously obtain the maximum rotation angles of the first hub and the second hub, thereby saving measuring time.

Description

Angle measuring device and angle measuring method

Technical Field

The invention relates to the technical field of whole vehicle disassembly calibration of commercial vehicles, in particular to an angle measuring device and an angle measuring method.

Background

The front axle assembly is one of the important components of the vehicle, and the maximum turning angle of the front axle assembly determines the minimum turning radius of the vehicle, represents the steering capability of the front axle assembly and has a great influence on the overall vehicle performance. Therefore, it is necessary to measure the maximum rotational angles of the first and second hubs of the front axle assembly before the front axle assembly is disassembled.

In the related art, a scribing method or an angle plate method is generally adopted to measure the maximum rotation angle of the first hub and the second hub, but the problems of low measurement accuracy and long time consumption exist.

Disclosure of Invention

Accordingly, it is necessary to provide an angle measuring device and an angle measuring method that can improve the accuracy of measuring the maximum rotation angle of the first hub and the second hub and can save time.

According to one aspect of the present application, there is provided an angle measuring device for measuring a maximum rotational angle of a first hub and a second hub of a front axle assembly of a vehicle, the front axle assembly including a front axle and first and second hubs connected to opposite ends of the front axle; the angle measuring device includes:

the mounting bracket is used for mounting the front shaft;

the first calibration plate is used for being arranged on the first hub, and the second calibration plate is used for being arranged on the second hub; a kind of electronic device with high-pressure air-conditioning system

The two measuring pieces are arranged at intervals along the second direction, and each measuring piece is configured to be capable of simultaneously emitting measuring light to the first calibration plate and the second calibration plate so as to obtain the distances between the reference plane and the first calibration plate and the second calibration plate along the first direction;

the reference plane is perpendicular to the first direction and passes through the connecting line of the emitting points of the two measuring pieces; the first direction and the second direction are perpendicular to each other.

According to the angle measuring device, the measuring piece is arranged, the distance between the reference plane and the first calibration plate and the distance between the reference plane and the second calibration plate along the first direction are obtained through measuring light rays emitted by the measuring piece, and the obtained distances are calculated to determine the maximum rotation angle of the front shaft, so that the measuring precision is improved; through set up first demarcation board and second demarcation board on first wheel hub and second wheel hub respectively, and the measuring part can be simultaneously to first demarcation board and second demarcation board emission measuring light to obtain the biggest corner of first wheel hub and second wheel hub simultaneously, thereby save measuring time.

In one embodiment, the front axle is provided with a mounting hole; the mounting bracket comprises a bracket body and a limiting piece;

the bracket body is configured to telescope in a third direction; the limiting piece is movably arranged on one side of the bracket body along the second direction, the front shaft is arranged on one side of the bracket body, which is close to the limiting piece, along the third direction, and the limiting piece is arranged in the mounting hole so as to limit the movement of the front shaft;

the third direction is perpendicular to the first direction and the second direction.

In one embodiment, the stent body comprises:

a first support movably disposed along the first direction; a kind of electronic device with high-pressure air-conditioning system

The second support is movably arranged on the first support along the third direction, the front shaft is arranged on one side, deviating from the first support along the third direction, of the second support, and the limiting piece is movably arranged on one end, deviating from the first support along the third direction, of the second support along the second direction.

In one embodiment, the first bracket is provided with a plurality of first through holes at intervals along the third direction, and the second bracket is provided with a plurality of second through holes corresponding to the first through holes at intervals along the third direction;

the bracket body further comprises a first fastening piece, wherein the first fastening piece penetrates through one of the first through holes and one of the second through holes so as to connect the first bracket and the second bracket.

In one embodiment, a first chute extending along the second direction is arranged at one end of the second bracket, which is away from the first bracket along the third direction;

the limiting piece comprises a limiting part and a mounting part connected with the limiting part, and the mounting part is movably arranged on the first chute; the limiting part is arranged in the mounting hole.

In one embodiment, the limiting portion and the mounting portion are threaded.

In one embodiment, the angle measurement device further comprises two mounts configured to be retractable in a third direction;

one of the measuring pieces is arranged on one of the mounting seats, and the other measuring piece is arranged on the other mounting seat;

the third direction is perpendicular to the first direction and the second direction.

In one embodiment, the measuring member includes a measuring member body and a transmitting portion;

one end of the measuring part body is arranged on the mounting seat; the transmitting part is arranged at the other end of the measuring part body and is used for transmitting measuring light rays, and the transmitting part is configured to be capable of transmitting the measuring light rays to the first calibration plate and the second calibration plate at the same time.

In one embodiment, the measurement element is a laser rangefinder.

According to another aspect of the present application, there is provided an angle measurement method, using any one of the angle measurement devices described above, the angle measurement method including the following measurement steps:

the front axle is arranged on the mounting bracket, the first calibration plate is arranged on the first hub, the second calibration plate is arranged on the second hub, and the standard distance between the reference plane and the first calibration plate as well as the standard distance between the second calibration plate along the first direction are obtained based on the current measurement information of the two measurement pieces;

controlling the first hub and the second hub to rotate to the position of the maximum rotation angle, and acquiring the rotation angle distance between the reference plane and the first calibration plate and between the reference plane and the second calibration plate along the first direction based on the current measurement information of the two measurement pieces;

a maximum rotational angle of the first hub and the second hub is determined based on the standard distance and the rotational angle distance.

Drawings

FIG. 1 is a schematic view of an angle measurement device according to an embodiment of the present application;

FIG. 2 is a schematic structural view of a limiting member according to an embodiment of the present disclosure;

FIG. 3 is a schematic view of a slider according to an embodiment of the present disclosure;

FIG. 4 is a flow chart of an angle measurement method according to an embodiment of the present disclosure;

FIG. 5 is a schematic diagram of the measurement of the labeling angle by the right trapezoid measurement method in the related art;

fig. 6 is a schematic diagram of a measurement of a rotation angle by a right trapezoid measurement method in the related art.

Reference numerals illustrate:

10. an angle measuring device; 11. a mounting bracket; 111. a bracket body; 1111. a first bracket; 1111a, a first through hole; 1112. a second bracket; 1112a, a second through hole; 1112b, first runner; 112. a limiting piece; 1121. a limit part; 1122. a mounting part; 113. a slider; 1131. a roller; 12. a first calibration plate; 13. a second calibration plate; 14. a measuring member; 141. a measuring member body; 142. a transmitting section; 15. a mounting base; 151. a first mounting portion; 152. a second mounting portion; 16. a base; 161. a second chute; 21. a front axle; 22. a first hub; 23. a second hub; 31. a straight rod a; 32. a straight rod b; 33. a straight rod c;

x: a first direction; y: a second direction; z: and a third direction.

Detailed Description

In order that the above objects, features and advantages of the invention will be readily understood, a more particular description of the invention will be rendered by reference to the appended drawings. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention. The present invention may be embodied in many other forms than described herein and similarly modified by those skilled in the art without departing from the spirit of the invention, whereby the invention is not limited to the specific embodiments disclosed below.

In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings are merely for convenience in describing the present invention and simplifying the description, and do not indicate or imply that the device or element being referred to must have a specific orientation, be configured and operated in a specific orientation, and therefore should not be construed as limiting the present invention.

Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include at least one such feature. In the description of the present invention, the meaning of "plurality" means at least two, for example, two, three, etc., unless specifically defined otherwise.

In the present invention, unless explicitly specified and limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; either directly or indirectly, through intermediaries, or both, may be in communication with each other or in interaction with each other, unless expressly defined otherwise. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art according to the specific circumstances.

In the present invention, unless expressly stated or limited otherwise, a first feature "up" or "down" a second feature may be the first and second features in direct contact, or the first and second features in indirect contact via an intervening medium. Moreover, a first feature being "above," "over" and "on" a second feature may be a first feature being directly above or obliquely above the second feature, or simply indicating that the first feature is level higher than the second feature. The first feature being "under", "below" and "beneath" the second feature may be the first feature being directly under or obliquely below the second feature, or simply indicating that the first feature is less level than the second feature.

It will be understood that when an element is referred to as being "fixed" or "disposed" on another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and the like are used herein for illustrative purposes only and are not meant to be the only embodiment.

Fig. 1 is an assembly schematic diagram of an angle measurement device according to an embodiment of the present application.

Referring to fig. 1, an angle measuring device 10 is provided for measuring the maximum rotational angle of a first hub and a second hub of a front axle assembly of a vehicle, the front axle assembly including a front axle and first and second hubs connected to opposite ends of the front axle. The angle measuring device 10 includes a mounting bracket 11 for mounting a front axle, a first calibration plate 12 and a second calibration plate 13 disposed at intervals in a first direction (as shown in an X direction in fig. 1), and two measuring members 14 disposed at intervals in a second direction (as shown in a Y direction in fig. 1). The first calibration plate 12 is used for being arranged on a first hub, and the second calibration plate 13 is used for being arranged on a second hub; each measuring member 14 is configured to be capable of emitting measuring light to the first calibration plate 12 and the second calibration plate 13 simultaneously to obtain distances of the reference plane from the first calibration plate 12 and the second calibration plate 13, respectively, in the first direction. Wherein the reference plane is perpendicular to the first direction and passes through the connection line of the emission points of the two measuring pieces 14; the first direction and the second direction are perpendicular to each other.

In this way, by arranging the measuring piece 14, the distances between the reference plane and the first calibration plate 12 and the second calibration plate 13 along the second direction are obtained by measuring light rays emitted by the measuring piece 14, and then the obtained distances are calculated to determine the maximum rotation angle of the front axle, so that the measurement accuracy is improved; by arranging the first calibration plate 12 and the second calibration plate 13 on the first hub and the second hub respectively, and the measuring member 14 can simultaneously emit measuring light to the first calibration plate 12 and the second calibration plate 13 so as to simultaneously obtain the maximum rotation angles of the first hub and the second hub, thereby saving measuring time.

Fig. 2 is a schematic structural view of a limiting member according to an embodiment of the present application.

The front axle is provided with a mounting hole. Referring to fig. 1 and 2, in some embodiments, the mounting bracket 11 includes a bracket body 111 and a stopper 112, where the bracket body 111 is configured to telescope in a third direction (as shown in the Z direction in fig. 1); the limiting piece 112 is movably arranged on one side of the bracket body 111 along the second direction, the front shaft is arranged on one side of the bracket body 111, which is close to the limiting piece 112 along the third direction, and the limiting piece 112 is arranged in the mounting hole so as to limit the movement of the front shaft. The third direction is perpendicular to the first direction and the second direction.

Thus, the front axle is supported by the mounting bracket 11; the position of the front axle is adjusted by providing the bracket body 111 which stretches and contracts along the third direction, so that the axis of the front axle is parallel to the first direction; the limiting piece 112 matched with the mounting hole of the front shaft is arranged to position the front shaft, and the limiting piece 112 can also limit the movement of the front shaft.

Referring to fig. 1 and 2, in some embodiments, the bracket body 111 includes a first bracket 1111 movably disposed along a first direction, and a second bracket 1112 movably disposed along a third direction, the second bracket 1112 is movably disposed on the first bracket 1111, a front axle is disposed on a side of the second bracket 1112 facing away from the first bracket 1111 along the third direction, and a limiting member 112 is movably disposed on an end of the second bracket 1112 facing away from the first bracket 1111 along the second direction. Referring to fig. 1, in order to support the front axle, stability of the front axle provided to the second bracket 1112 is improved, and one end of the second bracket 1112 for supporting the front axle is configured as a rectangular plate structure so as to increase a contact area between the front axle and the second bracket 1112. It will be appreciated that the particular structural shape of the second bracket 1112 may be configured as desired and is not limited to the structural shape illustrated in fig. 1 of the present application.

Fig. 3 is a schematic structural view of a sliding member according to an embodiment of the present application.

Referring to fig. 1 and 3, in some embodiments, in order to facilitate the movement of the mounting bracket 11 in the first direction, so as to adapt to the structure of the front axle, the angle measurement device 10 further includes a base 16, where the base 16 is provided with two second sliding grooves 161, the two second sliding grooves 161 are spaced apart along the second direction, and both the two second sliding grooves 161 extend along the first direction; the first bracket 1111 is provided with two sliding members 113 engaged with the two second sliding grooves 161 at a side thereof remote from the second bracket 1112 in the third direction, and the mounting bracket 11 slides along the second sliding grooves 161 by means of the sliding members 113. Optionally, the slider 113 is provided with a roller 1131. Thus, by providing two sliding pieces 113, the stability of the mounting bracket 11 when sliding is facilitated to be improved.

Referring to fig. 1, in some embodiments, the first bracket 1111 is provided with a plurality of first through holes 1111a at intervals along the third direction, and the second bracket 1112 is provided with a plurality of second through holes 1112a corresponding to the first through holes 1111a at intervals along the third direction; the holder body 111 further includes a first fastener penetrating one of the first through holes 1111a and one of the second through holes 1112a to connect the first holder 1111 and the second holder 1112. It is understood that the first bracket 1111 and the second bracket 1112 are movably connected, and the specific connection manner is not limited to the connection manner illustrated in fig. 1 of the present application.

In some embodiments, an end of the second bracket 1112 facing away from the first bracket 1111 along the third direction is provided with a first sliding slot 1112b extending along the second direction; the limiting member 112 includes a limiting portion 1121 and an installation portion 1122 connected to the limiting portion 1121, and the installation portion 1122 is movably disposed in the first chute 1112b; the limiting portion 1121 is provided in the mounting hole.

In some embodiments, the stop 1121 and the mount 1122 are threadably connected. The stopper 1121 and the mount 1122 are screwed together to fine-tune the front axle so that the axis of the front axle is parallel to the first direction. It will be appreciated that the specific arrangement position of the screw thread may be selected according to need, for example, referring to fig. 2, in this application, an end of the mounting portion 1122 close to the limiting portion 1121 in the third direction is configured as a cylinder, an end of the mounting portion 1122 far from the limiting portion 1121 in the third direction is configured as a cuboid, and the screw thread may be a cylindrical portion and a cuboid portion of the mounting portion 1122. In other words, the threaded connection is to achieve fine adjustment, and the position of the threads may be set according to the need and the specific structure of the stopper 112, which is not limited thereto.

In some embodiments, the mounting bracket 11 includes two limiting members 112, where the two limiting members 112 are disposed at intervals along the second direction at an end of the second bracket 1112 facing away from the first bracket 1111 along the third direction.

In some embodiments, two mounting brackets 11 are provided, the two mounting brackets 11 being spaced apart along the first direction. Thus, by providing two mounting brackets 11, the stability of supporting the front axle is improved.

In some embodiments, the angle measurement device 10 further comprises two mounts 15, the mounts 15 configured to be retractable along a third direction; one of the measuring members 14 is mounted to one of the mounting blocks 15, and the other measuring member 14 is mounted to the other mounting block 15.

In some embodiments, the mount 15 includes a first mount 151, a second mount 152, and a second fastener. One end of the first mounting portion 151 in the third direction is mounted to the base 16, the second mounting portion 152 is movably inserted into the first mounting portion 151 in the third direction, and one end of a second fastener (not shown) passes through the first mounting portion 151 and abuts against the second mounting portion 152, thereby restricting movement of the second mounting portion 152. The second mounting portion 152 is generally "L" shaped overall to facilitate mounting of the measurement member 14. It is to be understood that the specific structure of the mounting base 15 is not limited thereto, and the specific manner of stretching the mounting base 15 along the third direction may be the same as or different from the manner of stretching the bracket body 111 along the third direction, which is not limited thereto.

In this way, by providing the mount 15 that stretches and contracts in the third direction so as to adjust the positions of the measuring pieces 14, the distances between the emission points of the two measuring pieces 14 and the base 16 in the third direction are equalized, thereby reducing the measurement error of the angle measuring device 10.

In some embodiments, the measurement member 14 includes a measurement member body 141 and a transmitting portion 142; one end of the measuring element body 141 is provided at the second mounting portion 152 of the mounting seat 15; the emitting part 142 is provided at the other end of the measuring member body 141 for emitting the measuring light, and the emitting part 142 is configured to be capable of emitting the measuring light to the first calibration plate 12 and the second calibration plate 13 at the same time.

In some embodiments, a scale is provided at one end of the measuring body connecting mount 15, so as to obtain the distance between the emitting points of the two emitting portions 142 along the second direction.

In some embodiments, the measurement member 14 is a laser rangefinder.

In the case of taking the measuring element 14 as a laser range finder, in order to enable the measuring element 14 to emit the measuring light to the first calibration plate 12 and the second calibration plate 13 at the same time, the emitting portion 142 needs to be provided with two emitting mirrors, so as to meet the use requirement.

Fig. 4 is a flow chart of an angle measurement method according to an embodiment of the present application.

The application also provides an angle measurement method, which adopts the angle measurement device 10 of any embodiment, and the angle measurement method comprises the following measurement steps:

s110, mounting the front axle on the mounting bracket 11, mounting the first calibration plate 12 on the first hub, mounting the second calibration plate 13 on the second hub, and acquiring the reference plane and the standard distance between the first calibration plate 12 and the second calibration plate 13 along the first direction based on the current measurement information of the two measurement pieces 14;

s120, controlling the first hub and the second hub to rotate to the position of the maximum rotation angle, and acquiring the rotation angle distance between the reference plane and the first calibration plate 12 and the second calibration plate 13 along the first direction based on the current measurement information of the two measurement pieces 14;

s130, determining the maximum rotation angle of the first hub and the second hub based on the standard distance and the rotation angle distance.

Specifically, step S110 specifically includes:

adjusting the two mounting brackets 11 so that the distance between the side of the two second brackets 1112 facing away from the first bracket 1111 in the third direction and the base 16 in the third direction is equal;

according to the model and size information of the front axle, the positions of the two mounting brackets 11 are adjusted along the first direction so that the distance between the two mounting brackets 11 is matched with the size of the front axle;

adjusting the gaps of the two limiting pieces 112 of each mounting bracket 11 along the second direction so that the limiting pieces 112 are matched with the mounting holes of the front axle;

the first calibration plate 12 is mounted on the bolt of the first hub, and the second calibration plate 13 is mounted on the bolt of the second hub;

the two second mounting portions 152 are adjusted such that a side of the two second mounting portions 152 facing away from the first mounting portion 151 in the third direction is equidistant from the base 16 in the third direction;

two measuring members 14 are installed, and the two measuring members 14 are symmetrically disposed.

In this application, referring to fig. 1, two mounting brackets 11 are symmetrically disposed, two mounting seats 15 are symmetrically disposed, and two measuring members 14 are symmetrically disposed.

In this way, by adjusting the positions of the mounting bracket 11, the limiting member 112 and the mounting seat 15 so that the angle measuring device 10 is adapted to the front axle, the front axle can be better supported, and the measurement error caused by the angle measuring device 10 can be reduced.

After the above-mentioned angle measuring device 10 is installed and adjusted, two measuring members 14 are opened, each measuring member 14 emits measuring light to the first calibration plate 12 and the second calibration plate 13 at the same time, so as to obtain the distance between the point of the measuring light emitted from each measuring member 14 to the first calibration plate 12 and the reference plane along the second direction, where the distance is b1 and c1, and the distance between the point of the measuring light emitted from each measuring member 14 to the second calibration plate 13 and the reference plane along the second direction, where the distance is d1 and e1.

In the present application, the measuring device 14 is exemplified by a laser range finder, which is an instrument for accurately measuring the distance from the target by using laser light, and the laser range finder emits a very thin laser beam to the target when in operation, receives the laser beam reflected by the target by the photoelectric element, and calculates the distance from the observer to the target by measuring the time from the emission to the reception of the laser beam by the timer. Therefore, the distance acquired in the method can be directly acquired by reading the display screen of the laser range finder, and manual calculation is not needed.

The step S120 specifically includes:

controlling the first hub and the second hub to rotate leftwards or rightwards to the position of the maximum rotation angle; the left is the left steering of the wheel hub relative to the whole vehicle, and the right is the right steering of the wheel hub relative to the whole vehicle.

The maximum rotation angle includes a maximum rotation angle at which the first hub turns left to the limit position, a maximum rotation angle at which the first hub turns right to the limit position, a maximum rotation angle at which the second hub turns left to the limit position, and a maximum rotation angle at which the second hub turns right to the limit position.

After the first hub and the second hub rotate to the maximum rotation angle position, the two measuring pieces 14 are opened again, each measuring piece 14 simultaneously emits measuring light to the first calibration plate 12 and the second calibration plate 13, so that the distance between the point of the measuring light emitted by each measuring piece 14 to the first calibration plate 12 and the reference plane along the second direction is obtained, the distances are set as b2 and c2, and the distance between the point of the measuring light emitted by each measuring piece 14 to the second calibration plate 13 and the reference plane along the second direction is obtained, and the distances are set as d2 and e2.

The step S130 specifically includes:

determining the distance of the emitting points of the two emitting parts 142 along the second direction, and setting the distance as L; specifically, two measurement baselines are symmetrically arranged, for example, a side, away from each other, of the two first mounting portions 151 along the second direction is taken as a measurement baseline, the distance between the two measurement baselines along the second direction is measured through a ruler, the distance between the corresponding measurement baselines and one side, extending along the second direction, of the second mounting portion 152 towards the other mounting seat 15 is measured, and the distance between the emission points of the two emission portions 142 along the second direction is determined through calculation; it is understood that the measuring method for determining the distance of the emission points of the two emission portions 142 in the second direction may be selected as needed, and is not limited to the measuring method of the present application;

determining a maximum left or right angle of rotation of the first hub: specifically, calculating the absolute value of the difference between b2 and c2, dividing the absolute value of the difference between b2 and c2 by L, obtaining a value which is the tangent value after the first hub rotates, calculating the absolute value of the difference between b1 and c1, dividing the absolute value of the difference between b1 and c1 by L, obtaining a value which is the tangent value before the first hub rotates, calculating angles corresponding to the two tangent values by using a trigonometric function, and subtracting the angle before the rotation from the angle after the rotation, namely the maximum left or right angle of the first hub;

determining a maximum left or right angle of the second hub; specifically, calculating the absolute value of the difference between d2 and e2, dividing the absolute value of the difference between d2 and e2 by L, obtaining a value which is the tangent value after the second hub rotates, calculating the absolute value of the difference between d1 and e1, dividing the absolute value of the difference between d1 and e1 by L, obtaining a value which is the tangent value before the second hub rotates, calculating angles corresponding to the two tangent values by using a trigonometric function, and subtracting the angle before the rotation from the angle after the rotation, namely the maximum left or right angle of the first hub;

it should be noted that, the angle before the rotation of the first hub and the second hub is measured, so as to reduce the measurement error, and the angle before the rotation of the hubs may be zero or may not be zero.

According to the angle measurement method, the maximum rotation angle corresponding to the position of the first hub and the second hub which rotate leftwards or rightwards to the maximum rotation angle can be measured simultaneously, and the measurement efficiency is improved.

FIG. 5 is a schematic diagram of the measurement of the labeling angle by the right trapezoid measurement method in the related art; fig. 6 is a schematic diagram of a measurement of a rotation angle by a right trapezoid measurement method in the related art.

It should be noted that, referring to fig. 5 and 6, the angle measurement method of the present application adopts a right trapezoid measurement method, and in order to facilitate explanation of the principle of the right trapezoid measurement method, taking the measurement of the maximum rotation angle of the first hub 22 and the second hub 23 as an example. The tool required for the right trapezoid measuring method comprises three straight bars (for convenience of description, a straight bar a31, a straight bar b32 and a straight bar c 33) with sufficient length, a square box and a ruler, wherein the front shaft 21 is arranged on the square box (or other supporting pieces) for supporting the front shaft 21, two opposite ends of the straight bar a31 are respectively arranged on two bolts symmetrically arranged on the first hub 22 (namely, a connecting line of the two bolts passes through the axis of the first hub 22) and are fixed by nuts, the straight bar a31 is arranged vertically to the front shaft 21 and is arranged in parallel to the ground, one end of the straight bar b32 is arranged at one end of the straight bar a31, the other end of the straight bar c33 is abutted to one side of the square box, one end of the straight bar c33 is abutted to one side of the square box, the other end of the straight bar b32 and the other end of the straight bar c33 are abutted to the side of the square box, the straight bars b32 and the straight bars c33 are arranged vertically to the side of the square box, and are arranged in parallel to the ground. Thus, the straight bar a31, the straight bar b32, the straight bar c33 and the side surfaces of the square box, which are abutted against the straight bar b32 and the straight bar c33, form a right trapezoid. At this time, the values a, b, c corresponding to fig. 5 may be measured by a ruler, and the sine value of the angle α, α is calculated as the difference of b minus c divided by a trigonometric function.

Taking fig. 6 as an example, the first hub 22 and the second hub 23 are controlled to rotate to the left to the position of the maximum rotation angle; the sine value of the value b ', c', α 'corresponding to fig. 6 is measured by the ruler, and is the difference of b' minus c 'divided by a, and the difference of α' minus α is the maximum rotation angle corresponding to the position where the first hub 22 rotates leftwards to the maximum rotation angle. Similarly, the other three maximum corners can be found, and will not be described in detail herein.

In this application, for the convenience of measurement, a tangent function is used instead of a sine function, and the principle is the same.

The technical features of the above-described embodiments may be arbitrarily combined, and all possible combinations of the technical features in the above-described embodiments are not described for brevity of description, however, as long as there is no contradiction between the combinations of the technical features, they should be considered as the scope of the description.

The above examples illustrate only a few embodiments of the invention, which are described in detail and are not to be construed as limiting the scope of the invention. It should be noted that it will be apparent to those skilled in the art that several variations and modifications can be made without departing from the spirit of the invention, which are all within the scope of the invention. Accordingly, the scope of protection of the present invention is to be determined by the appended claims.

Claims (10)

1. An angle measuring device for measuring a maximum rotational angle of a first hub and a second hub of a front axle assembly of a vehicle, the front axle assembly including a front axle and the first hub and the second hub connected to opposite ends of the front axle; the angle measuring device is characterized by comprising:

the mounting bracket is used for mounting the front shaft;

the first calibration plate is used for being arranged on the first hub, and the second calibration plate is used for being arranged on the second hub; a kind of electronic device with high-pressure air-conditioning system

The two measuring pieces are arranged at intervals along the second direction, and each measuring piece is configured to be capable of simultaneously emitting measuring light to the first calibration plate and the second calibration plate so as to obtain the distances between the reference plane and the first calibration plate and the second calibration plate along the first direction;

the reference plane is perpendicular to the first direction and passes through the connecting line of the emitting points of the two measuring pieces; the first direction and the second direction are perpendicular to each other.

2. The angle measurement device of claim 1, wherein the front axle is provided with a mounting hole; the mounting bracket comprises a bracket body and a limiting piece;

the bracket body is configured to telescope in a third direction; the limiting piece is movably arranged on one side of the bracket body along the second direction, the front shaft is arranged on one side of the bracket body, which is close to the limiting piece, along the third direction, and the limiting piece is arranged in the mounting hole so as to limit the movement of the front shaft;

the third direction is perpendicular to the first direction and the second direction.

3. The angle measurement device of claim 2, wherein the bracket body comprises:

a first support movably disposed along the first direction; a kind of electronic device with high-pressure air-conditioning system

The second support is movably arranged on the first support along the third direction, the front shaft is arranged on one side, deviating from the first support along the third direction, of the second support, and the limiting piece is movably arranged on one end, deviating from the first support along the third direction, of the second support along the second direction.

4. The angle measurement device according to claim 3, wherein the first bracket is provided with a plurality of first through holes at intervals along the third direction, and the second bracket is provided with a plurality of second through holes corresponding to the first through holes at intervals along the third direction;

the bracket body further comprises a first fastening piece, wherein the first fastening piece penetrates through one of the first through holes and one of the second through holes so as to connect the first bracket and the second bracket.

5. The angle measurement device according to claim 3, wherein a first chute extending in the second direction is provided at an end of the second bracket facing away from the first bracket in the third direction;

the limiting piece comprises a limiting part and a mounting part connected with the limiting part, and the mounting part is movably arranged on the first chute; the limiting part is arranged in the mounting hole.

6. The angle measurement device of claim 5, wherein the stop portion and the mounting portion are threadably coupled.

7. The angle measurement device of claim 1, further comprising two mounts configured to be retractable in a third direction;

one of the measuring pieces is arranged on one of the mounting seats, and the other measuring piece is arranged on the other mounting seat;

the third direction is perpendicular to the first direction and the second direction.

8. The angle measurement device of claim 7, wherein the measurement member comprises a measurement member body and a transmitting portion;

one end of the measuring part body is arranged on the mounting seat; the transmitting part is arranged at the other end of the measuring part body and is used for transmitting measuring light rays, and the transmitting part is configured to be capable of transmitting the measuring light rays to the first calibration plate and the second calibration plate at the same time.

9. The angle measurement device of claim 1, wherein the measurement element is a laser rangefinder.

10. An angle measuring method, characterized in that an angle measuring device according to any one of claims 1-9 is used, comprising the following measuring steps:

the front axle is arranged on the mounting bracket, the first calibration plate is arranged on the first hub, the second calibration plate is arranged on the second hub, and the standard distance between the reference plane and the first calibration plate as well as the standard distance between the second calibration plate along the first direction are obtained based on the current measurement information of the two measurement pieces;

controlling the first hub and the second hub to rotate to the position of the maximum rotation angle, and acquiring the rotation angle distance between the reference plane and the first calibration plate and between the reference plane and the second calibration plate along the first direction based on the current measurement information of the two measurement pieces;

a maximum rotational angle of the first hub and the second hub is determined based on the standard distance and the rotational angle distance.

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