CN117664066A - Device and method for measuring angle of space connecting rod - Google Patents

Abstract

The utility model provides a space connecting rod angle measuring device and method, in the knuckle rack construction, can accurate, quick measurement. The first and second measurement systems of the device share a base II and two measuring rods, and the first measurement system comprises: the measuring block, the bracket and the base I are fixed in the middle open slot of the bracket in an adjustable and elastic manner through a pin shaft, and the measuring block is provided with two holes for placing two measuring rods; the second measurement system includes: two positioning pin shafts which are used for being placed into the mounting holes of the base II, and a fastening nut washer which is used for locking the positioning pin shafts. The method comprises the following steps: selecting a coordinate plane on the test fixture to be parallel to XZ, YZ and XY planes of the whole vehicle; the selected coordinate plane is parallel to a slide block groove line on the test platform; when the projection of the space connecting rod on the vertical plane and the angle of the corresponding coordinate axis are measured, the base II is parallel to the selected coordinate plane through a slide block groove line on the test platform by using an angle ruler; the two measuring bars are contacted with the space connecting rod to be measured.

Description

Device and method for measuring angle of space connecting rod

Technical Field

The invention relates to a knuckle test bench test measurement technology, in particular to a space connecting rod angle measurement device and a space connecting rod angle measurement method.

Background

The automobile steering knuckle is one of the main parts in automobile suspension system, and is connected to the automobile connecting rods, bearings, hub and brake assembly to support the front and back load of automobile, support and drive the hub to rotate and realize flexible steering and normal running. The reliability of the knuckle directly affects the normal running of the automobile and the life safety of vehicle-mounted personnel, and particularly the knuckle is subjected to variable impact and fatigue load in the running state of the automobile, so that the knuckle has higher requirements on the strength, fatigue, rigidity and mechanical properties in all aspects. Therefore, during the product development period, one of the most important tasks is to verify whether the fatigue life and strength of the product can meet the requirements of various working conditions. Along with the acceleration of development speed of various vehicle types, the development period of the vehicle types is shortened, the development force of a knuckle bench test is continuously enhanced, the mechanical property of the knuckle is improved to meet the requirements of various road conditions, and the development of the automobile industry is urgent. Each host factory has developed a test bench that simulates an automotive suspension and two verification schemes that test for each single hole of the knuckle. Most tests require that the steering knuckle is assembled into a suspension simulation test system, and the test bed relates to various rod systems, such as a shock absorber simulation rod, a front upper control arm simulation rod, a front beam arm simulation rod and the like, and the test bed building drawing has angle requirements on the related rod systems. Because the test bed rod systems for simulating the whole vehicle suspension are all spatial connecting rods, the level gauge can only measure the angle in the vertical plane, and no effective tool is available for accurately measuring other angles at present.

Disclosure of Invention

In order to solve the problems, the invention aims to provide the space connecting rod angle measuring device which can accurately and rapidly measure the included angle between the projection of the space connecting rod on the whole vehicle coordinate plane or other planes of the test bed and the axis in the process of constructing the steering knuckle test bed, and provide data for adjusting the angle of the connecting rod so as to adjust the angle of the connecting rod to meet the drawing requirement.

According to an aspect of the present invention, there is provided a spatial link angle measurement apparatus including: the first measurement system for measuring space connecting rod at vertical plane projection and axis contained angle and/or the second measurement system for measuring space connecting rod at horizontal plane projection and axis contained angle, first measurement system and second measurement system sharing base II, two measuring sticks, base II includes upper portion cuboid board, lower part cuboid board and connects the connecting plate of two, the homonymy terminal surface of the upper portion cuboid board of base II and lower part cuboid board is parallel to each other, the top surface of upper portion cuboid board and the bottom surface of lower part cuboid board are parallel to each other, the upper portion cuboid board forms there is the mounting hole, first measurement system includes: the measuring block is provided with two holes and is used for placing the two measuring rods in a mode that the central lines of the two measuring rods coincide with the central lines of the corresponding holes respectively, the bottom cuboid plate can be connected with the upper cuboid plate of the base II in an aligned mode through the mounting holes, the connecting surface can be connected with the bracket, the peripheral end faces of the bottom cuboid plate are parallel to the peripheral end faces of the upper cuboid plate, the lower cuboid plates are parallel to the corresponding faces of the bracket, and the side faces of the bracket are perpendicular to the lower cuboid plate; the second measurement system includes: the two locating pins are used for being placed into the mounting holes of the base II, and the fastening nut washers are used for locking the locating pins, wherein the central connecting line of the two locating pins is parallel to the corresponding end face of the lower rectangular plate, and the two measuring rods can be mounted on the locating pins in a clearance fit mode overlapped with the central line of the corresponding locating pins.

Preferably, the pin is secured in a clearance fit with the intermediate open slot.

Preferably, the base I is fixed with the bracket and the base II by fastening screw members respectively.

Preferably, the spatial link angle measurement device is further provided with a square box, wherein a first plane of the square box is parallel to the XZ plane, a second plane of the square box is parallel to the YZ plane, and a third plane of the square box is parallel to the XY plane.

Preferably, the space connecting rod angle measuring device is further provided with a square box, and one or more planes of a second plane, a first plane and a third plane of the square box, which are orthogonal to each other, form a set angle with the plane of the whole vehicle.

Preferably, the spatial link angle measurement device further has: the level gauge is used for measuring the angle of the measuring block, and the angle ruler is used for measuring the included angle between the base II and the second plane as well as between the base II and the first plane.

According to another aspect of the present invention, there is provided a method for measuring a spatial link angle, using the spatial link angle measuring apparatus, comprising the steps of: selecting a coordinate plane on a test fixture to be parallel to the XZ, YZ and XY planes of the whole vehicle or form a preset angle; : when the test bed is built, the selected coordinate plane is parallel to the groove line of the sliding block on the test platform or forms a set angle with the groove line of the sliding block; : when the projection of the space connecting rod on the vertical plane and the angle of the corresponding coordinate axis are measured, the base II is parallel to the selected coordinate plane or forms a set angle with the selected coordinate plane through a slide block groove line on the test platform by using an angle ruler; : contacting the two measuring rods with a space connecting rod to be measured; : the projection angle of the space connecting rod on the vertical plane is read by a level gauge; : the projection angle of the space connecting rod on the horizontal plane is read by a water angle ruler.

The device has the beneficial effects that for angles which cannot be accurately measured by the level, the device can accurately and rapidly measure the included angle between the projection of the space connecting rod in the test bed on the whole vehicle coordinate plane or other planes and the axis, and the angles of the space connecting rod can be continuously adjusted through measurement, so that the drawing requirement is met.

Drawings

FIG. 1 is an overall block diagram of the invention for measuring the projection of a space linkage in the XZ plane and the X-axis clamping angle θ.

FIG. 2 is an exploded view of the present invention for measuring the projection of a spatial linkage in the XZ plane and the X-axis pinch angle θ.

FIG. 3 is a partial block diagram of the invention for measuring the projection of a spatial linkage in the XZ plane and the X-axis pinch angle θ.

Fig. 4 is a practical application diagram of the invention for measuring the projection of the space connecting rod on the XZ plane and the X-axis clamping angle θ.

Fig. 5 is an overall structure diagram of the invention for measuring the complementary angle of the space link projected on the XY plane and the Y-axis clamping angle λ.

Fig. 6 is an exploded view of the present invention for measuring the complementary angle of the space linkage projected on the XY plane and the Y-axis clamping angle λ.

Fig. 7 is a practical application diagram of the invention for measuring the complementary angle of the space connecting rod projected on the XY plane and the Y-axis clamping angle lambda.

Fig. 8 shows a schematic diagram of an angle between the projection of the space link and the axis in the whole vehicle coordinate plane.

Detailed Description

Exemplary embodiments of the present invention are described in detail below with reference to the attached drawings. The exemplary embodiments described below and illustrated in the drawings are intended to teach the principles of the present invention to enable one skilled in the art to make and use the present invention in a number of different environments and for a number of different applications. The scope of the invention is therefore defined by the appended claims, and the exemplary embodiments are not intended, and should not be considered, as limiting the scope of the invention. Moreover, for ease of description, where like elements are designated by like or similar reference numerals throughout the several views, the dimensions of the various parts shown are not necessarily drawn to scale, and references to orientation, such as longitudinal direction of the body, and orientation or positional relationship indicated above, below, left, right, top, bottom, etc., are all based on the orientation or positional relationship shown in the drawings, merely for ease of description and to simplify the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be configured and operated in a particular orientation, and therefore should not be construed as limiting the invention. The following description of the embodiments emphasizes the differences between the embodiments, and the same or similar features may be referred to each other, so that technical features in the different embodiments may be freely combined to form further embodiments according to design needs for brevity and not described in detail.

The invention provides a space connecting rod angle measuring device, which can accurately and rapidly measure the included angles lambda, phi and theta of the space connecting rod of a test bed in a whole vehicle coordinate plane XY, YZ, XZ or other plane projection and axes in the process of constructing a steering knuckle test bed, and provides data for adjusting the angle of the connecting rod so as to adjust the angle of the connecting rod to meet the drawing requirement. The included angle lambda is the angle between the projection of the space connecting rod CD on the XY plane and the Y-axis, phi is the angle between the projection of the space connecting rod CD on the YZ plane C 'D' and the Y-axis, and theta is the angle between the projection of the space connecting rod CD on the XZ plane C 'D' and the X-axis, as shown in FIG. 8.

The invention utilizes the principle that the projection and two points determine a straight line to find out the projection of any two points on the space connecting rod on the whole vehicle reference plane, thus obtaining the included angles lambda, phi and theta between the projection of the space connecting rod on the whole vehicle reference planes XY, YZ and XZ and the axis. The angles alpha, beta and gamma of the space connecting rod and the three datum planes XY, YZ and XZ of the whole vehicle, the angles lambda, phi and theta of the projection of the space connecting rod on the three datum planes and the axes are measured at will, namely the other four terms can be calculated through a formula, namely the angles of the space connecting rod in the space are determined by knowing two terms in the six angles, and the detail is shown in the table 1. Therefore, the invention can measure the included angle between the projection of the space connecting rod on three reference planes and the axis.

TABLE 1 spatial angle solving relationship

As shown in fig. 1 to 4, the measuring block 2, the bracket 11, the base i 13, and the base ii 16 are assembled.

Preferably, the measuring block 2 is provided with two shafts 27 with holes to facilitate the mounting of the measuring rod 12 for the measurement. The bracket 11 is in the form of a longitudinal strip, and the plate surface is formed with a central open slot 28 and surrounding bracket sides 18. Base I13 includes: a bottom rectangular parallelepiped plate 31 having four connection holes 30, and a connection surface 32 erected vertically from the center of the bottom rectangular parallelepiped plate 31. The base ii 16 includes an upper rectangular parallelepiped plate 26, a lower rectangular parallelepiped plate 36, and a connecting plate connecting the two. The upper rectangular plate 26 is formed with mounting holes corresponding to the connection holes 30, and the lower rectangular plate 36 is for mounting on a test platform.

The same side end surfaces of the upper rectangular parallelepiped plate 26 and the lower rectangular parallelepiped plate 36 of the base ii 16 are parallel to each other, and the top surface of the upper rectangular parallelepiped plate 26 and the bottom surface of the lower rectangular parallelepiped plate 36 are parallel to each other. The peripheral end face of the bottom rectangular parallelepiped plate 31 is parallel to the peripheral end face of the upper rectangular parallelepiped plate 26, and the connection face 32 is parallel to the peripheral end face of the bottom rectangular parallelepiped plate 31.

More specifically, the rolling bearing 3 is put into the measuring block 2, and the two are in copper hammer driving type interference fit and fixed by the clamp spring 4. The pin shaft 5 passes through the inner hole of the rolling bearing 3, the pin shaft 5 and the rolling bearing 3 are in copper hammer driving type interference fit, the end face of the pin shaft 5 is fixed by the shaft end check ring 7 and the fastening bolt 6, and the pin shaft 5 and the rolling bearing 3 are prevented from being separated. After the installation, the other end of the pin shaft 5 passes through the middle open groove 28 of the bracket 11, the pin shaft 5 is in clearance fit with the middle open groove 28 of the bracket 11, and the pin shaft is fixed by the gasket I8, the gasket II 9 and the fastening bolt 10. The shaft shoulder on the pin shaft 5 is arranged on one side of the bracket 11, the gasket I8, the gasket II 9 and the fastening bolt 10 are arranged on the other side of the bracket 11, so that the fastening bolt 10 is locked, and the measuring block 2 is fixed on the bracket 11.

The above is connected with the smaller base I13 and the larger base II 16 in sequence, and is fixed by the fastening bolt 14 and the fastening bolt 15 (corresponding to the fastening screw), namely, the fastening bolt 14 is used for fixing the bracket 11 and the base I13, and the fastening bolt 15 is used for fixing the base I13 and the base II 16 through four connecting holes 30. The bottom cuboid plate 31 of the base I13 is aligned with the upper cuboid plate 26 of the base II 16, and the bracket side 18 is perpendicular to the bottom cuboid plate 31 and parallel to the corresponding peripheral end faces of the bottom cuboid plate 31. The upper rectangular plate 26 of the base ii 16 and the lower rectangular plate 36 of the base ii 16 are held parallel with the corresponding end surfaces.

Two measuring rods 12 are placed in corresponding two holes of the measuring block 2, which are in a clearance fit, but cannot move radially relative to each other. Ensuring that the centre lines of the two measuring bars 12 coincide with the corresponding hole centre lines of the shafts 27 of the measuring block 2.

Thus, after mounting the bracket 11 on the base I13, the respective faces of the bracket 11 are secured parallel to the faces of the lower rectangular parallelepiped plate 36 of the base II 16, and the bracket sides 18 of the bracket 11 are secured perpendicular to the lower rectangular parallelepiped plate 36. In summary, the base ii 16, the base i 13, and the bracket 11 (including the open slot) are ensured to be parallel or perpendicular to each other, without leaving an angle, so as to prevent measurement errors. While ensuring that the measuring rod 12 is in a straight state and does not bend.

As shown in fig. 4, in the jig design stage, a plane of a test jig is generally selected to be parallel to the entire vehicle coordinate plane. In fig. 4, the first plane 21 of the square box is selected to be parallel to the whole vehicle XZ plane, the second plane 20 is selected to be parallel to the whole vehicle YZ plane, and the third plane 22 is selected to be parallel to the whole vehicle XY plane. In a few cases, one or more of the second plane 20, the first plane 21, and the third plane 22 orthogonal to each other are selected to be at an angle to the plane of the whole vehicle. The second plane 20, the first plane 21 and the third plane 22 are parallel or at a certain angle with the groove line of the sliding block of the test platform. When the test fixture is designed, the position of the whole vehicle coordinate origin and the position of the steering knuckle in the real vehicle are adopted, and the coordinates of the hinging points (hard points) at the two ends of each connecting rod are the coordinates in the real vehicle. Thus facilitating the design of the clamp and the construction of the test stand. Meanwhile, the general test load direction is also designed and given according to a certain angle parallel to or with the whole vehicle coordinate plane. However, in the actual bench construction, due to the existence of fixture manufacturing errors, assembly errors and bench construction errors, the deviation of a connecting rod hinge point is caused, so that the position state of the steering knuckle can have larger errors with the actual position in the whole vehicle during the test, and the test result is influenced. Thus, the second plane 20, the first plane 21 and the third plane 22 which are preselected in the design of the clamp are used, the angles of the connecting rods and the second plane 20, the first plane 21 and the third plane 22 are adjusted by using the angle measuring device, and the lengths of the connecting rods or the positions of the clamp are properly adjusted, so that the angles of the connecting rods related to the steering knuckle are consistent with the angles of the real vehicle, and the stress state of the steering knuckle in the test can be consistent with the stress state of the steering knuckle in the real vehicle. Many customers specify the angle of the knuckle-related links in the test requirements, and thus it is necessary to measure the link angle to be consistent with the customer requirements. Examples are as follows: the intended measurement of the projection of the damper analog rod 19 on the XZ plane and the X-axis clamping angle θ operates as follows: after the fastening bolt 10 is loosened and the measuring block 2 is adjusted to a proper height, the fastening bolt 10 is locked. The measuring block 2 is rotated by adjusting the support side 18 parallel to the first plane 21 with the angle gauge 17 so that both measuring bars 12 are in contact with the damper analogue bar 19. The angle of the measuring block 2 is then measured by the level 1, which is the angle θ between the projection of the damper analog rod 19 on the first plane 21 and the X-axis, and compared with the 3D measurement of the test bench, adjusted until it is within the tolerance range. Since the second plane 20 and the first plane 21 of the test bench are generally parallel to the groove line of the platform, it is very easy to adjust the parallelism of the bracket side 18 and the first plane 21 by using the angle gauge 17. The measuring rod 12 can be provided with a plurality of length specifications according to actual needs. If it is desired to measure the angle phi between the projection of the damper analog rod 19 onto the second plane 20 and the Y-axis, the method is the same.

If it is desired to measure the space linkage's projected at the third plane 22 at an angle lambda to the Y-axis. As shown in fig. 5 and 6, the threaded locating pin 23 is placed into a corresponding hole in the base ii 16, and the threaded locating pin and the base ii are in clearance fit, but cannot move radially relative to each other, and are locked by the fastening nut washer 24. The plane formed by the two central lines of the two threaded positioning pins 23 is ensured to be parallel to the corresponding end surface of the cuboid plate 36 at the lower part of the base II 16. The two measuring rods 12 are placed on the positioning pins 23 with a clearance fit, but no radial relative movement is possible. It is ensured that the two measuring rods 12 coincide with the centre lines of the respective positioning pins 23. As shown in fig. 7, in order to measure the complementary angle between the projection of the spring arm simulation rod 25 on the third plane 22 and the Y-axis clamping angle λ, the two measuring rods 12 are contacted with the spring arm simulation rod 25, and the angle between the rectangular plate 36 at the lower part of the base ii 16 and the corresponding X-axis parallel groove line is measured by the angle gauge 17 because the first plane 21 and the second plane 20 are parallel to the platform groove line when the gantry is constructed, that is, the complementary angle between the projection of the spring arm simulation rod 25 on the third plane 22 and the Y-axis clamping angle λ. The complementary angle of the included angle lambda is convenient to measure at the moment, and then compared with the 3D measuring result of the test bench, the complementary angle lambda is adjusted until the complementary angle lambda is within the tolerance range.

Preferably, the positioning pin 23 is also provided with a pin hole for inserting one end of the measuring rod 12, however, not limited thereto, and a pin hole may be formed on one end of the measuring rod 12 instead. It is ensured that the positioning pin 23 and the measuring rod 12 do not shake radially so as not to affect the measuring accuracy. Similarly, the measuring rod 12 and the shaft rod 27 can be similarly inserted.

In a few cases, the test bed is not parallel to the test bed slot line but has a certain angle when being built. Thus, in the above operation, when the angle gauge 17 is used, the angle between the test stand and the groove line of the platform needs to be added or subtracted.

In addition to the level 1 and the angle gauge 17, a set of measuring devices is prepared in each of the above two cases, so that the measuring speed can be increased. In this way, the spatial link angle measuring device of the present invention includes the first measuring system for measuring the angle between the projection of the spatial link on the vertical plane (the second plane 20, the first plane 21) and the axis, and the second measuring system for measuring the angle between the projection of the spatial link on the horizontal plane (the third plane 22) and the axis.

According to the invention, the measuring block 2 is internally provided with a rolling bearing, and can rotate, and the measuring angle range is large. The support 11 is provided with an elongated hole-like central open slot 28, so that the height of the measuring block 2 can be adjusted. The principle that one straight line is confirmed by projection and two points is utilized, the space connecting rod can be projected onto the whole vehicle coordinate plane or other needed planes, and therefore the included angle between the projection of the space connecting rod on the whole vehicle coordinate plane and the axis can be accurately and rapidly measured.

According to the above embodiment, the measurement method is summarized as follows:

s1, selecting a coordinate plane on a test fixture to be parallel to the XZ, YZ and XY planes of the whole vehicle or form a preset angle.

S2: when the test bench is built, the selected coordinate plane is parallel to the groove line of the sliding block on the test platform or forms a set angle with the groove line of the sliding block, so that the space connecting rod angle can be conveniently measured and calculated;

s3: ensuring that the measuring device is installed correctly;

s4: when the projection of the space connecting rod on the vertical plane and the angle of the corresponding coordinate axis are measured, the angle ruler 17 is used for enabling the base II 16 to be parallel to the selected coordinate plane or form a set angle with the selected coordinate plane through the groove line of the sliding block on the test platform;

s5: contacting the two measuring bars 12 to the spatial linkage to be measured;

s6: the projection angle of the space connecting rod on the vertical plane is read by a level meter 1;

s7: the projection angle of the space connecting rod on the horizontal plane is read by a water angle ruler 17;

s8: the spatial angle solving relation of the table 1 is built in excel or other software, a formula relation is built, the measured two angles are input into a formula table, and the angle to be solved is solved through automatic calculation;

s9: and determining whether the space angle of the connecting rod needs to be adjusted according to the measured angle.

In step S1, the whole vehicle XZ, YZ, XY planes are selected in the jig design stage, and are generally parallel, and are selected more than a predetermined angle. In step S2, whether the coordinate plane is parallel to the slot line or forms a certain angle is selected according to convenience of building when the test stand is built, i.e. the set angle is determined by convenience of building the test stand. In step S2 and step S4, the test bench is built parallel to the groove line, the base II 16 is parallel to the groove line, the test bench is built at a certain angle with the groove line, and the base II 16 is built at a certain angle with the groove line. The angles on the XZ, YZ and XY planes of the whole vehicle can be selected, so that the corresponding surface of the base II 16 is required to be ensured to be parallel to the XZ, YZ and XY planes of the whole vehicle.

In the description of the present application, "axis" means an axis of an XYZ space coordinate system, and "plurality" means two or more unless explicitly defined otherwise. Unless specifically stated or limited otherwise, the terms "mounted," "connected," "secured" and the like should be construed broadly, as they may be fixed, removable, or integral, for example; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communicated with the inside of two elements or the interaction relationship of the two elements. The specific meaning of the terms in this application will be understood by those of ordinary skill in the art as the case may be. While the invention has been described with reference to various specific embodiments, it should be understood that numerous changes could be made within the spirit and scope of the inventive concepts described. Accordingly, it is intended that the invention not be limited to the described embodiments, but that it have the full scope defined by the language of the following claims.

Claims (7)

1. A spatial link angle measurement device, comprising: the first measuring system for measuring the included angle between the vertical plane projection and the axis and/or the second measuring system for measuring the included angle between the horizontal plane projection and the axis of the space connecting rod share a base II (16) and two measuring rods (12), the base II (16) comprises an upper cuboid plate (26), a lower cuboid plate (36) and a connecting plate for connecting the upper cuboid plate and the lower cuboid plate (36), the same side end surfaces of the upper cuboid plate (26) and the lower cuboid plate (36) of the base II (16) are parallel to each other, the top surface of the upper cuboid plate (26) and the bottom surface of the lower cuboid plate (36) are parallel to each other, the upper cuboid plate (26) is provided with a mounting hole,

the first measurement system includes: a measuring block (2) internally provided with a rolling bearing (3), a pin shaft (5) penetrating through an inner hole of the rolling bearing (3), a bracket (11) provided with a bracket side surface (18) and a middle opening groove (28), and a base I (13) comprising a bottom cuboid plate (31) and a connecting surface (32) vertically erected from the bottom cuboid plate (31), wherein the connecting surface (32) is parallel to the peripheral end surface of the bottom cuboid plate (31), one end of the pin shaft (5) penetrates through the middle opening groove (28) and is adjustably fixed in the middle opening groove (28) through a fastening bolt (10), the measuring block (2) is provided with two holes for placing the two measuring rods (12) in a mode that the central lines of the two measuring rods (12) respectively coincide with the central lines of the corresponding holes, the bottom cuboid plate (31) can be aligned and connected with the upper cuboid plate (26) of the base II (16) through the mounting holes, and the connecting surface (32) can be connected with the bracket (11) so that the peripheral end surface of the bottom cuboid plate (31) is parallel to the peripheral end surface Fang Tiban of the upper cuboid plate (16) and the peripheral end surface of the corresponding to the lower cuboid plate (18) are parallel to the lower cuboid plate (18);

the second measurement system includes: the two measuring rods (12) can be mounted on the positioning pin shafts (23) in a clearance fit mode overlapped with the central line of the corresponding positioning pin shafts (23), and the two positioning pin shafts (23) are arranged in the mounting holes of the base II (16) and are used for locking the fastening nut washers (24) of the positioning pin shafts (23), wherein the central connecting line of the two positioning pin shafts (23) is parallel to the corresponding end face of the lower part length Fang Tiban (36).

2. The spatial link angle measurement device according to claim 1, characterized in that the pin (5) is fixed in a clearance fit with the intermediate open slot (28).

3. The spatial link angle measurement device according to claim 1, characterized in that the base i (13) is fixed with the bracket (11) and the base ii (16) with fastening screws, respectively.

4. The spatial link angle measurement device according to claim 1, characterized in that a square box is also provided, the first plane (21) of which is parallel to the XZ plane, the second plane (20) is parallel to the YZ plane, and the third plane (22) is parallel to the XY plane.

5. The spatial link angle measurement device according to claim 1, further comprising a square box, wherein one or more of a second plane (20), a first plane (21), and a third plane (22) of the square box, which are orthogonal to each other, are formed at a set angle with respect to a plane of the whole vehicle.

6. The spatial link angle measurement device according to claim 4 or 5, characterized by further comprising: the measuring device comprises a level meter (1) for measuring the angle of the measuring block (2) and an angle ruler (17) for measuring the included angle between a base plate of the base II (16) and the second plane (20) and between the base plate of the base II and the first plane (21).

7. A method for measuring the angle of a space connecting rod, characterized in that the space connecting rod angle measuring device according to claim 6 is adopted, comprising the following steps:

s1, selecting a coordinate plane on a test fixture to be parallel to XZ, YZ and XY planes of the whole vehicle or form a preset angle;

s2: when the test bed is built, the selected coordinate plane is parallel to the groove line of the sliding block on the test platform or forms a set angle with the groove line of the sliding block;

s4: when the projection of the space connecting rod on the vertical plane and the angle of the corresponding coordinate axis are measured, the base II (16) is parallel to the selected coordinate plane or forms a set angle with the selected coordinate plane through a sliding block groove line on the test platform by using an angle gauge (17);

s5: contacting the two measuring rods (12) with a spatial link to be measured;

s6: the projection angle of the space connecting rod on the vertical plane is read by a level meter (1);

s7: the projection angle of the space connecting rod on the horizontal plane is read by a water angle ruler (17).