CN220418421U - Four-way clamping device of measuring shaft and wheel angle measuring equipment - Google Patents

Abstract

The utility model provides a four-direction clamping device for a measuring shaft and wheel angle measuring equipment, relates to the technical field of wheel angle measurement, and solves the problem that the existing clamping device cannot be connected quickly and reliably. The main support is provided with a measuring plane, and a special-shaped hole which is communicated along a straight line parallel to the measuring plane is arranged below the measuring plane, wherein the special-shaped hole comprises an upper half part which is a semicircular groove and a lower half part which is connected with the upper half part; the adjusting piece for the shaft is movably arranged in the lower half part, and a lower semicircular groove which extends linearly is formed in the surface, facing the upper half part, of the adjusting piece for the shaft; the opening and closing handle is movably connected with the main support piece, and the top end of the opening and closing handle is movably connected with the bottom surface of the adjusting piece for the shaft; the two ends of the spring are respectively connected with the opening and closing handle and the main supporting piece, wherein the spring can push the opening and closing handle to drive the top end of the opening and closing handle to move along the bottom surface of the adjusting piece for the shaft so as to push the lower semicircular groove to move upwards to form a complete round hole with the upper half part. Compared with the prior art, the utility model can be connected with the shaft quickly and reliably.

Description

Four-way clamping device of measuring shaft and wheel angle measuring equipment

Technical Field

The utility model relates to the technical field of wheel angle measurement, in particular to a four-way clamping device of a measuring shaft and wheel angle measurement equipment.

Background

When measuring the camber angle value related to the vehicle wheel, the transmission shaft is led out and externalized effectively by connecting an external tool on the transmission shaft, and the angle value related to the wheel is measured by an installed angle measuring instrument. The external frock is fixed through fixture and transmission shaft, and fixture locating shaft that is connected on the fixture can represent the motion face of tire, consequently, combines measuring instrument and fixture locating shaft and can measure the relevant angle value of vehicle wheel, so, measuring instrument is connected with fixture locating shaft very necessarily fast accurately, but at present, among the prior art, the chucking device that is related with the axle includes with the connected mode of axle:

1. the shaft sleeve is inserted, and the defect of the shaft sleeve is that a fit clearance exists, the shaft sleeve cannot be firmly fastened with a shaft, and the problem of loose clamping exists.

2. The hoop is clasped, and the defect of the hoop is that the tightness degree influences the connection precision of the hoop and the shaft, and the adjustment time is too long.

3. The screw connection type has the defects of limited space, inconvenient operation and insufficient precision.

4. The V-shaped clamp type has the advantages of ensuring the precision and being complex in installation and long in time.

The mode is except that the shaft sleeve is inserted, the shaft sleeve is not connected with the shaft sleeve in a threaded mode, the time required for installation is more than 30 seconds, and the accuracy is inaccurate when the shaft sleeve is too fast. Therefore, the clamping device represented by the above connection cannot quickly and reliably establish connection with the shaft.

In addition, the existing various clamping devices can only enable the shaft to pass through in one direction and be fastened with the shaft, and cannot enable the shaft to pass through in multiple directions, so that an axial plane parallel to a measuring plane on the clamping device cannot be manufactured by changing the passing direction of the shaft, and further the angle measuring precision of the shaft cannot be guaranteed.

Disclosure of Invention

One of the purposes of the present utility model is to design a four-way clamping device for measuring an axle and a wheel angle measuring device, which are used for solving the problem that the existing clamping device connected with the axle cannot be connected with the axle quickly and reliably when the camber angle of the wheel is measured.

The utility model is realized by the following technical scheme:

the utility model provides a measuring shaft four-way clamping device which comprises a main supporting piece, a shaft adjusting piece, an opening and closing handle and a spring, wherein the main supporting piece is connected with the shaft adjusting piece; the main support is provided with a measuring plane, and a special-shaped hole penetrating along a straight line parallel to the measuring plane is arranged below the measuring plane, and comprises an upper half part arranged as a semicircular groove and a lower half part connected with the upper half part; the shaft adjusting piece is movably arranged in the lower half part, and a lower semicircular groove which extends linearly is formed in the surface of the shaft adjusting piece facing the upper half part; the opening and closing handle is movably connected with the main support piece, and the top end of the opening and closing handle is movably connected with the bottom surface of the shaft adjusting piece; the two ends of the spring are respectively connected with the opening and closing handle and the main supporting piece, wherein the spring can push the opening and closing handle to drive the top end of the opening and closing handle to move along the bottom surface of the adjusting piece for the shaft so as to push the lower semicircular groove to move upwards and be combined with the upper half part to form a through whole round hole.

When the structure is adopted, when the opening and closing handle is reversely pushed by overcoming the action of the spring, the lower semicircular groove of the adjusting piece for the shaft can be separated from the upper half part of the special-shaped hole, enough space can be reserved, and the main supporting piece can be conveniently and rapidly sleeved on the shaft to be measured. When the opening and closing handle is loosened, the opening and closing handle can push the shaft adjusting piece to ascend in the lower half part of the special-shaped hole under the action of the spring, so that the lower semicircular groove can be combined with the upper half part of the special-shaped hole to form a whole round hole for rapidly clamping the shaft inserted into the special-shaped hole and maintaining the clamping state. After the angle of the shaft is measured, the clamping action of the lower semicircular groove and the upper half part on the shaft can be eliminated rapidly by only reversely pushing the opening and closing handle against the action of the spring, and the main support piece is pulled away from the shaft rapidly. Therefore, the measuring shaft four-way clamping device can be quickly and reliably connected with a shaft and quickly disassembled.

Further, in order to better realize the utility model, the following arrangement structure is adopted: the special-shaped holes comprise a first special-shaped hole extending along a first direction and a second special-shaped hole extending along a second direction; the lower semicircular groove comprises a first lower semicircular groove and a second lower semicircular groove, the axes of the first lower semicircular groove and the axes of the second lower semicircular groove are orthogonal, the first lower semicircular groove and the second lower semicircular groove form a cross groove, and the first lower semicircular groove and the second lower semicircular groove can be respectively combined with the first special-shaped hole and the second special-shaped hole to form two crossed round holes.

With the above arrangement, the crisscrossed first and second profiled holes allow the shaft to be inserted into the main support from four different directions and to cooperate with the cross-shaped recess to clamp the shaft. The plane where the axes of the two whole round holes formed by the special-shaped holes and the lower semicircular groove are positioned is parallel to the measuring plane, and an axial plane parallel to the measuring plane can be manufactured by changing the passing direction of the shaft, so that the angle measuring precision of the shaft can be well ensured.

Further, in order to better realize the utility model, the following arrangement structure is adopted: the top end of the opening and closing handle is connected with a bearing, and the outer ring of the bearing contacts the bottom surface of the shaft adjusting piece.

Further, in order to better realize the utility model, the following arrangement structure is adopted: the precision of the upper half and the lower half groove is in units of wires.

When the structure is adopted, the upper half part of the special-shaped hole is a semicircular groove which is manufactured by taking the wire as a unit, the lower semicircular groove of the shaft adjusting piece is also a semicircular groove which is manufactured by taking the wire as a unit, and the upper half part and the lower half part can form a high-precision whole circular hole after being combined, can be well combined with the shaft, and ensures the precision.

Further, in order to better realize the utility model, the following arrangement structure is adopted: and a limiting step is formed at the junction between the upper half part and the lower half part of the special-shaped hole, and in the whole round hole, the notch of the lower semicircular groove is abutted against the limiting step.

Further, in order to better realize the utility model, the following arrangement structure is adopted: the main support piece comprises a head and an upright post connected to the bottom of the head, and the bottom end of the opening and closing handle is hinged to the upright post; one end of the spring is connected with the upright post; the upright post is sleeved with a fixed handle.

When the structure is adopted, the upright post is hinged with the opening and closing handle, so that the operation of holding by one hand can be realized, the force is easy to exert, after the spring is matched, the loading and clamping operation can be completed within a few seconds through simple holding and releasing actions, the shaft is tightly and reliably connected, and the operation is simpler.

Further, in order to better realize the utility model, the following arrangement structure is adopted: the adjusting piece for the shaft is provided with a long round hole extending up and down at one end of the first lower semicircular groove, a pin shaft of the adjusting piece for the shaft is arranged in the long round hole in a penetrating mode, and the pin shaft of the adjusting piece for the shaft is connected with the main supporting piece.

Further, in order to better realize the utility model, the following arrangement structure is adopted: the main support piece is connected with a rotatable eccentric shifting button at one end of the first special-shaped hole, which is far away from the oblong hole, and the wheel surface of the eccentric shifting button is contacted with the bottom surface of the shaft adjusting piece.

When adopting above-mentioned setting structure, the eccentric button of dialling can be used for increasing and adjusting the clamping force of lower semicircle groove counter shaft by the bottom surface of adjusting part for the butt axle, avoids taking place not hard up in the use.

The utility model also provides wheel angle measuring equipment, which comprises an angle measuring instrument, a battery and the measuring shaft four-way clamping device; the angle measuring instrument is connected to the measuring plane and is capable of measuring an inclination angle of the measuring plane, and the battery is connected to the main support for supplying power to the angle measuring instrument.

The utility model has the following advantages and beneficial effects:

according to the utility model, when the opening and closing handle is reversely pushed against the action of the spring, the lower semicircular groove of the shaft adjusting piece and the upper half part of the special-shaped hole can be separated, enough space can be reserved, and the main support piece can be conveniently and quickly sleeved on the shaft to be measured. When the opening and closing handle is loosened, the opening and closing handle can push the shaft adjusting piece to ascend in the lower half part of the special-shaped hole under the action of the spring, so that the lower semicircular groove can be combined with the upper half part of the special-shaped hole to form a whole round hole for rapidly clamping the shaft inserted into the special-shaped hole and maintaining the clamping state. After the angle of the shaft is measured, the clamping action of the lower semicircular groove and the upper half part on the shaft can be eliminated rapidly by only reversely pushing the opening and closing handle against the action of the spring, and the main support piece is pulled away from the shaft rapidly. Therefore, the measuring shaft four-way clamping device can be quickly and reliably connected with a shaft and quickly disassembled.

Drawings

In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described, it being obvious that the drawings in the following description are only some embodiments of the utility model, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.

FIG. 1 is a schematic diagram of a four-way clamping device for a measuring shaft;

FIG. 2 is an exploded view of the four-way clamping device of the measuring shaft;

FIG. 3 is a cross-sectional view of a four-way clamping device for a measuring shaft;

FIG. 4 shows the mating structure of the bearing and the shaft adjuster ramp;

fig. 5 is a schematic structural view of the wheel angle measuring apparatus.

Marked in the figure as:

1. a main support; 11. a first shaped hole; 12. a second shaped hole; 13. measuring a plane; 14. a limit step;

2. an adjusting member for a shaft; 21. a first lower semicircular groove; 22. a second lower semicircular groove; 23. a slotted hole; 24. the adjusting piece pin shaft for the shaft; 25. an inclined surface;

3. an opening and closing handle; 4. a spring; 5. a bearing; 6. a fixed handle; 7. an eccentric toggle; 8. an angle measuring instrument; 9. and a battery.

Detailed Description

In order to make the objects, technical solutions and advantages of the present utility model more apparent, the technical solutions of the present utility model will be described in detail below. It will be apparent that the described embodiments are only some, but not all, embodiments of the utility model. All other embodiments, based on the examples herein, which are within the scope of the utility model as defined by the claims, will be within the scope of the utility model as defined by the claims.

In the description of the present utility model, it is to be noted that, unless otherwise indicated, the meaning of "plurality" means two or more; the terms "upper," "lower," "left," "right," "inner," "outer," "front," "rear," "head," "tail," and the like are used as an orientation or positional relationship based on that shown in the drawings, merely to facilitate description of the utility model and to simplify the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore should not be construed as limiting the utility model. Furthermore, the terms "first," "second," "third," and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

In the description of the present utility model, it should also be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium. The specific meaning of the above terms in the present utility model can be understood as appropriate by those of ordinary skill in the art.

Example 1:

as shown in fig. 1, 2, 3 and 4, the four-way clamping device of the measuring shaft is specifically configured as follows:

in this embodiment, the measuring shaft four-way clamping device comprises a main supporting piece 1, a shaft adjusting piece 2, an opening and closing handle 3 and a spring 4.

As shown in fig. 1 to 4, the main support 1 comprises a head of a rectangular parallelepiped structure and a vertical column extending downward in the vertical direction integrally formed at the bottom of the head. The head is provided with a measuring plane 13 on the top surface, a special-shaped hole extending horizontally and linearly is arranged below the measuring plane 13, the axis of the special-shaped hole is parallel to the measuring plane 13, and two end orifices of the special-shaped hole are formed on two opposite side surfaces of the main support piece 1. The special-shaped hole is composed of an upper half part and a lower half part connected with the upper half part to form the whole hole, wherein the upper half part is provided with a semicircular groove, the shape of the lower half part is indefinite, and the section size is larger than the radius of the upper half part so that the shaft can be conveniently inserted into the special-shaped hole. The bottom surface of the main support 1 is provided with a slot exposing the bottom of the profiled hole, which slot is used to provide a movable space for the top of the opening and closing handle 3. The two sides of the upright post are respectively connected with a handle shell, the two handle shells form a fixed handle 6 which is sleeved outside the upright post, the fixed handle 6 is of a special-shaped structure, the human engineering is met, and the surface of the fixed handle 6 is provided with a concave structure which is attached to the tiger mouth part of the finger so as to facilitate the hand to hold and exert force. The fixed handle 6 is provided with a window exposing the upright, which is used for providing a space for installing the spring 4 and a movable space of the opening and closing handle 3.

As shown in fig. 2 and 3, the shaft adjuster 2 is provided in the lower half, and the surface of the shaft adjuster 2 facing the upper half is provided with a lower semicircular groove extending along a straight line. One end of the adjusting piece 2 for the shaft is provided with a long round hole 23 which extends vertically and runs through, a horizontally arranged adjusting piece pin shaft 24 is penetrated in the long round hole 23, and two ends of the adjusting piece pin shaft 24 for the shaft penetrate out of the long round hole 23 to be connected with the main supporting piece 1, so that the adjusting piece 2 for the shaft can turn up and down in the lower half part about a hinge point of the adjusting piece 2 for the shaft and the main supporting piece 1, and can also move up and down upwards, so that the lower half groove upwards approaches to the upper half part of the special-shaped hole to finally form a whole round hole, or the lower half groove downwards leaves the upper half part of the special-shaped hole.

The upper half part of the special-shaped hole and the lower semicircular groove of the shaft adjusting piece 2 are used for being in butt joint up and down to form a whole circular hole extending along a straight line. The precision of the upper half of the special-shaped hole is in units of wires, and the precision of the lower semicircular groove of the shaft adjusting piece 2 is in units of wires, so that a high-precision round hole can be formed after the upper half of the special-shaped hole and the lower semicircular groove are combined, the special-shaped hole can be well combined with the shaft, and the installation precision of the special-shaped hole and the shaft is ensured.

As shown in fig. 3, the opening and closing handle 3 has a special-shaped structure, accords with human engineering mechanics, and is provided with a concave-convex structure attached to the finger part on the surface so as to facilitate the force when being held by a hand. The bottom of the opening and closing handle 3 is hinged to the bottom of the upright post through a pin shaft, so that the opening and closing handle 3 can turn around the hinge point of the opening and closing handle and the upright post. The top end of the opening and closing handle 3 is contacted with the bottom surface of the shaft adjusting piece 2, and can move up and down on the bottom surface of the shaft adjusting piece 2 along with the turning of the opening and closing handle 3.

As shown in fig. 3, a gap is formed between the opening and closing handle 3 and the upright of the main support 1, a spring 4 is arranged in the gap, and two sides of the gap are shielded by a fixed handle 6. The spring 4 is arranged in the gap, one end of the spring 4 is connected to the upright post of the main support 1, and the other end of the spring penetrates out of the window arranged on the fixed handle 6 and is connected with the opening and closing handle 3. The spring 4 is a compression spring, is arranged at a position between the hinge point and the top end of the opening and closing handle 3, and is positioned on the same side of the upright post with the oblong hole 23. When not in use, the spring 4 is in the longest state, the spring 4 pushes the top end of the opening and closing handle 3 towards one side far away from the upright post, so that the top end of the opening and closing handle 3 upwards abuts the shaft adjusting piece 2 on the special-shaped hole of the main support piece 1, and the lower semicircular groove and the upper half part of the special-shaped hole are combined into a whole circular hole.

As shown in fig. 3 and 4, a bearing 5 is connected to the tip of the opening/closing handle 3, and the outer ring of the bearing 5 contacts the bottom surface of the shaft adjuster 2 and rolls when moving along the bottom surface of the shaft adjuster 2. The bottom surface of the shaft adjuster 2 is provided with an inclined surface 25 in the moving direction of the bearing 5 so that the opening and closing handle 3 can better control the turning of the shaft adjuster 2.

In the embodiment, the upright post is hinged with the opening and closing handle 3, so that the operation of holding by one hand can be realized, and the force is easy to be exerted. The spring 4 can push the opening and closing handle 3 to drive the top end of the opening and closing handle 3 to move along the bottom surface of the shaft adjusting piece 2 so as to push the lower semicircular groove to move upwards and be combined with the upper half part to form a through round hole. After the spring 4 is matched, the opening and closing handle 3 and the fixed handle 6 are held by hands, loading and clamping operation of the shaft can be completed in a few seconds through simple holding and placing actions, and tight and reliable connection with the shaft is established, so that the operation is simpler. When the opening and closing handle 3 is reversely pushed against the action of the spring 4, the shaft adjusting piece 2 can be turned downwards to enable the lower semicircular groove to be separated from the upper half part of the special-shaped hole, enough space can be reserved, and the main supporting piece 1 can be conveniently and quickly sleeved on the shaft to be measured. When the opening and closing handle 3 is loosened, the opening and closing handle 3 can push the shaft adjusting piece 2 to ascend in the lower half part of the special-shaped hole under the action of the spring 4, so that the lower semicircular groove can be combined with the upper half part of the special-shaped hole to form a whole round hole for rapidly clamping the shaft inserted into the special-shaped hole and maintaining the clamping state. After the angle of the shaft is measured, the clamping action of the lower semicircular groove and the upper half part on the shaft can be eliminated rapidly by only reversely pushing the opening and closing handle 3 against the action of the spring 4, and the main support piece 1 is pulled out from the shaft rapidly. Therefore, the measuring shaft four-way clamping device can be quickly and reliably connected with a shaft and quickly disassembled.

The special-shaped hole that the head of main support piece 1 set up can be one, and the lower semicircle groove that the regulating part 2 top surface was used to the axle sets up is one with it to match for the upper half in special-shaped hole and lower semicircle groove can form a whole round hole, are used for letting the axle penetrate in the special-shaped hole from two directions around the special-shaped hole.

Preferably, the head of the main support 1 is provided with two shaped holes, as shown in fig. 1 to 4, including a first shaped hole 11 extending in a first direction and a second shaped hole 12 extending in a second direction, the axes of the upper half of the first shaped hole 11 and the second shaped hole 12 are orthogonal (the outline of the upper half is shown as a thick solid line in fig. 2), and the planes in which their axes lie are arranged in parallel up and down with the measurement plane 13. The lower half groove of the shaft adjuster 2 includes a first lower half groove 21 and a second lower half groove 22, and the axes of the first lower half groove 21 and the second lower half groove 22 are orthogonal to each other to form a cross groove. The first lower semicircular groove 21 and the second lower semicircular groove 22 are respectively combined with the first special-shaped hole 11 and the second special-shaped hole 12 to form two through whole round holes, and the two whole round holes are orthogonal in the middle position to form a cross hole. The crisscrossed first and second profiled bores 11, 12 may allow the shaft to be inserted into the main support 1 from four different directions and cooperate with the cross grooves to clamp the shaft. The plane where the axes of the two whole round holes formed by the special-shaped holes and the lower semicircular groove are positioned is parallel to the measuring plane 13, an axial plane parallel to the measuring plane 13 can be manufactured by changing the passing direction of the shaft, the measuring, observing and calibrating actions of the shaft can be completed in different directions, and the angle measuring precision of the shaft can be well ensured.

As shown in fig. 1 to 4, a limiting step 14 extending along the axial direction of the upper half is formed at the junction between the upper half and the lower half of the special-shaped hole, and when the lower semicircular groove of the shaft adjusting member 2 and the upper half of the special-shaped hole form a round hole, the notch of the lower semicircular groove is abutted against the limiting step 14 and limited.

The oblong hole 23 is located at one end of the first lower semicircular groove 21 on the shaft adjuster 2. The main support piece 1 is connected with the eccentric pulling button 7 through the assembly of the screw and the movable sleeve, the eccentric pulling button 7 is positioned at one end of the first special-shaped hole 11 far away from the oblong hole 23, the wheel surface of the eccentric pulling button 7 contacts with the bottom surface of the end part of the adjusting piece 2 for the shaft, the clamping force of the adjusting piece 2 for the shaft can be sequentially adjusted by rotating the eccentric pulling button 7 to adjust the quantity of the wheel surface of the eccentric pulling button 7 which upwards invades into the end part of the first special-shaped hole 11, and the adjusting piece 2 for the shaft is prevented from loosening in the use process.

Example 2:

the present embodiment further provides a wheel angle measuring apparatus based on the above embodiment, in particular, employing the following arrangement:

in this embodiment, the wheel angle measuring apparatus includes the angle measuring instrument 8, the battery 9, and the measuring shaft four-way chucking device in embodiment 1 described above.

As shown in fig. 5, the angle measuring device 8 is connected to the measuring plane 13, the battery 9 is connected to the bottom end of the upright of the main support 1, and the battery 9 is electrically connected to the angle measuring device 8 for supplying power to the angle measuring device 8 as needed.

The angle measuring instrument 8 adopts an existing device which is fixed on the measuring plane 13 by bolts, and the angle measuring instrument 8 can obtain the inclination angle of the shaft by measuring the inclination angle of the measuring plane 13 to obtain the inclination angle of the wheel.

The foregoing is merely illustrative of the present utility model, and the present utility model is not limited thereto, and any person skilled in the art will readily recognize that variations or substitutions are within the scope of the present utility model.

Claims (10)

1. The utility model provides a four-way chucking device of measuring shaft which characterized in that: comprising the following steps:

a main support (1) provided with a measuring plane (13) and provided below the measuring plane (13) with a profiled hole passing through along a straight line parallel to the measuring plane (13), the profiled hole comprising an upper half provided as a half-slot and a lower half connected to the upper half;

a shaft adjusting member (2) movably provided in the lower half portion, wherein a surface of the shaft adjusting member (2) facing the upper half portion is provided with a lower semicircular groove extending in a straight line;

the opening and closing handle (3) is movably connected to the main supporting piece (1), and the top end of the opening and closing handle (3) is movably connected with the bottom surface of the shaft adjusting piece (2);

the two ends of the spring (4) are respectively connected with the opening and closing handle (3) and the main supporting piece (1), wherein the spring (4) can push the opening and closing handle (3) to drive the top end of the opening and closing handle (3) to move along the bottom surface of the adjusting piece (2) for the shaft so as to push the lower semicircular groove to move upwards and be combined with the upper half part to form a through whole round hole.

2. A measuring shaft four-way clutch according to claim 1, characterized in that: the profiled holes comprise a first profiled hole (11) extending in a first direction and a second profiled hole (12) extending in a second direction;

the lower semicircular groove comprises a first lower semicircular groove (21) and a second lower semicircular groove (22) which are orthogonal in axis, the first lower semicircular groove (21) and the second lower semicircular groove (22) form a cross groove, and the first lower semicircular groove (21) and the second lower semicircular groove (22) can be respectively combined with the first special-shaped hole (11) and the second special-shaped hole (12) to form two crossed round holes.

3. A measuring shaft four-way clutch according to claim 1, characterized in that: the top end of the opening and closing handle (3) is connected with a bearing (5), and the outer ring of the bearing (5) contacts the bottom surface of the shaft adjusting piece (2).

4. A measuring shaft four-way clutch according to claim 1, characterized in that: the precision of the upper half and the lower half groove is in units of wires.

5. A measuring shaft four-way clamping device according to claim 1 or 2, characterized in that: and a limiting step (14) is formed at the junction between the upper half part and the lower half part of the special-shaped hole, and in the whole round hole, the notch of the lower semicircular groove is abutted against the limiting step (14).

6. A measuring shaft four-way clutch according to claim 1, characterized in that: the main support (1) comprises a head and a stand column connected to the bottom of the head, and the bottom end of the opening and closing handle (3) is hinged to the stand column.

7. The measuring shaft four-way clamping device according to claim 6, wherein: the upright post is sleeved with a fixed handle (6).

8. A measuring shaft four-way clutch according to claim 2, characterized in that: an oblong hole (23) extending up and down is formed in the shaft adjusting piece (2) at one end of the first lower semicircular groove (21), a shaft adjusting piece pin shaft (24) is arranged in the oblong hole (23) in a penetrating mode, and the shaft adjusting piece pin shaft (24) is connected to the main supporting piece (1).

9. The measuring shaft four-way clamping device according to claim 8, wherein: the main support piece (1) is connected with a rotatable eccentric shifting button (7) at one end of the first special-shaped hole (11) far away from the oblong hole (23), and the wheel surface of the eccentric shifting button (7) is contacted with the bottom surface of the shaft adjusting piece (2).

10. A wheel angle measuring apparatus, characterized in that: comprising an angle measuring instrument (8), a battery (9) and a measuring shaft four-way clamping device according to any one of claims 1-9; the angle measuring instrument (8) is connected to the measuring plane (13) and is capable of measuring the inclination angle of the measuring plane (13), and the battery (9) is connected to the main support (1) for supplying the angle measuring instrument (8) with the required power.