Rotation Angle Measuring Device

Abstract

The present disclosure provides a rotation angle measuring device. The rotation angle measuring device can be horizontally movably connected with a measuring shaft, comprising: a clamping assembly for clamping a measured member; and a transmission assembly arranged on the clamping assembly and capable of driving the clamping assembly to expand or contract in a horizontal direction. The clamping assembly is provided with a first connecting piece in the direction of expansion, and the first connecting piece is used to horizontally movably connect the measuring shaft. The rotation angle measuring device of the present application can be used to detect the rotation angle of a steering wheel or a tire, and is simple to operate and accurate in detection result.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of vehicle detection, and in particular to a rotation angle measuring device. BACKGROUND

[0002] Before a vehicle is shipped or during maintenance and repair, the rotation angle of the steering wheel or the tire needs to be detected. In the prior art, the rotation angle of the steering wheel or the tire is detected by causing a dummy axle. However, this detection method has high requirements for the installation position of the dummy axle, and is difficult to operate and has poor measurement accuracy. There is no accurate method to measure the rotation angle of the tire in the prior art. SUMMARY

[0003] Therefore, the present application aims to provide a rotation angle measuring device to solve the above problems.

[0004] To achieve the above purpose, the present application provides a rotation angle measuring device, which can horizontally movably connect a measuring shaft, and comprises:

[0005] A holding assembly is arranged to hold a measured object.

[0006] A transmission assembly is arranged on the holding assembly and can drive the holding assembly to expand or contract in the horizontal direction.

[0007] The holding assembly is provided with a first connecting piece in the direction of expansion, and the first connecting piece is used to horizontally movably connect the measuring shaft.

[0008] Further, the holding assembly comprises:

[0009] A first base plate and a second base plate are movably connected in the vertical direction.

[0010] At least three sets of linkage rods are movably connected to the first base plate at one end and to the second base plate at the other end.

[0011] A holding column is arranged below each linkage assembly and is used to hold the measured object.

[0012] At least one of the holding columns is provided with the first connecting piece in the direction of expansion.

[0013] Further, each set of linkage rods comprises a first linkage rod and a second linkage rod arranged in the vertical direction.

[0014] One end of the first linkage rod is movably connected with the second linkage rod, and the other end is movably connected with the first base plate; the other end of the second linkage rod is movably connected with the second base plate;

[0015] The second linkage rod is provided with the embracing stand at the connection position with the first linkage rod.

[0016] Further, the transmission assembly comprises a turbine and a worm gear matched with each other, the worm gear is arranged on the first base plate, and the turbine is fixedly connected with the second base plate and located between the first base plate and the second base plate.

[0017] The worm gear drives the turbine to rotate, the turbine drives the second base plate to rotate, and the second base plate drives the embracing stand to perform the expansion movement or the contraction movement in the horizontal direction.

[0018] Further, at least one side of the embracing stand, which is directed to the direction of the contraction movement of the embracing assembly, is provided with an arc-shaped concave surface.

[0019] Further, a plurality of first connecting rods are uniformly arranged around the first base plate and correspond to the number of linkage rod groups, one end of each first connecting rod is connected with the first base plate, and the other end is movably connected with the first linkage rod.

[0020] Further, a plurality of second connecting rods are uniformly arranged around the second base plate and correspond to the number of linkage rod groups, one end of each second connecting rod is fixedly connected with the second base plate, and the other end is movably connected with the second linkage rod.

[0021] The application further provides another rotation angle measuring device, which can movably connect with a measuring shaft in the vertical direction, and comprises:

[0022] A fixed assembly and an embracing assembly arranged in the vertical direction, the fixed assembly can movably connect with the measuring shaft in the vertical direction and is directed away from the embracing assembly, and the embracing assembly is used for embracing a measured object;

[0023] A transmission assembly, which is arranged on the embracing assembly and can drive the embracing assembly to perform the expansion movement or the contraction movement in the horizontal direction.

[0024] Further, the embracing assembly comprises:

[0025] A first base plate and a second base plate movably connected in the vertical direction, the upper top surface of the first base plate is connected with the fixed assembly;

[0026] At least three linkage rod groups, one end of each linkage rod group is movably connected with the first base plate, and the other end is movably connected with the second base plate.

[0027] A number of clamping columns, matching the number of linkage rods, are vertically installed below each linkage component to clamp the tested part.

[0028] Furthermore, the fixing component includes a third base plate and a second connector. The third base plate is disposed above the second base plate, and the second connector is vertically disposed above the third base plate and can be vertically and movably connected to the measuring axis.

[0029] Furthermore, at least two third connecting rods are provided on the third substrate, and the fixing assembly further includes at least two sets of adjustment units. Each free end of the third connecting rod is provided with at least one set of adjustment units, and each set of adjustment units includes:

[0030] Rotary adjustment component;

[0031] The adjusting bolt that cooperates with the rotary adjusting component has its lower end connected to the first base plate, and its upper end passes through the corresponding third connecting rod and is movably connected to the corresponding rotary adjusting component.

[0032] A spring is fitted onto the corresponding adjusting bolt and elastically supports the third connecting rod.

[0033] As can be seen from the above description, the two types of rotation angle measuring devices provided by this invention are used to horizontally and vertically connect the measuring shaft, respectively. When it is necessary to detect the rotation angle and play of the steering wheel, the measuring shaft is horizontally connected to the first connecting member; when it is necessary to detect the rotation angle of the tire, the measuring shaft is vertically connected to the fixing component, and then the transmission component drives the clamping component to shrink until the clamping component clamps the workpiece under test, thus fixing the workpiece under test and the rotation angle measuring device. At this time, when the workpiece under test rotates, the measuring shaft will also rotate. At this time, the rotation angle of the measuring shaft can be directly measured to obtain the rotation angle of the workpiece under test, thereby achieving accurate measurement of the rotation angle of the workpiece under test. The operation is simple and convenient, and the detection results are more accurate. When the detection is completed, the transmission component drives the clamping component to expand, causing the rotation angle measuring device to separate from the workpiece under test, thereby removing the rotation angle measuring device from the workpiece under test. Attached Figure Description

[0034] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0035] Figure 1 This is a perspective view of the rotation angle measuring device according to an embodiment of the present invention;

[0036] Figure 2 This is a front view of the helix angle measuring device and measuring shaft assembled according to an embodiment of the present invention;

[0037] Figure 3 This is a top view of the helix angle measuring device and measuring shaft assembled according to an embodiment of the present invention;

[0038] Figure 4 This is a perspective view of the rotation angle measuring device and measuring shaft assembled according to an embodiment of the present invention.

[0039] Explanation of reference numerals in the attached drawings: 1-Measuring axis; 2-First connecting piece; 3-Clamping assembly; 31-First base plate; 32-Second base plate; 33-Linkage rod assembly; 331-First linkage rod; 332-Second linkage rod; 34-Clamping column; 341-Arc-shaped concave surface; 35-First connecting rod; 36-Second connecting rod; 4-Transmission assembly; 41-Worm gear; 5-Fixing assembly; 51-Third base plate; 52-Second connecting piece; 53-Third connecting rod; 54-Adjusting unit; 541-Rotational adjusting piece; 542-Spring. Detailed Implementation

[0040] To make the objectives, technical solutions, and advantages of the present invention clearer, the present invention will be further described in detail below with reference to specific embodiments and accompanying drawings.

[0041] It should be noted that, unless otherwise defined, the technical or scientific terms used in the embodiments of this invention should have the ordinary meaning understood by one of ordinary skill in the art to which this disclosure pertains. The terms "first," "second," and similar terms used in this disclosure do not indicate any order, quantity, or importance, but are merely used to distinguish different components. Terms such as "comprising" or "including" mean that the element or object preceding the word encompasses the elements or objects listed following the word and their equivalents, without excluding other elements or objects. Terms such as "connected" or "linked" are not limited to physical or mechanical connections, but can include electrical connections, whether direct or indirect. Terms such as "upper," "lower," "left," and "right" are used only to indicate relative positional relationships; when the absolute position of the described object changes, the relative positional relationship may also change accordingly.

[0042] The steering wheel is an essential component of a vehicle, used to control tire steering and thus vehicle steering. Steering wheels are typically designed to allow for a certain amount of play, providing a suitable margin of freedom. Play refers to the steering wheel's rotation angle; within this range, turning the steering wheel will not cause the tires to steer. During driving, drivers rarely maintain a completely still arm position for extended periods. If the steering wheel lacks play, these slight movements will cause the tires to steer, affecting the vehicle's trajectory and consequently, driving safety. However, excessive play requires drivers to make significant steering wheel movements to adjust the vehicle's direction, obviously impacting both driving experience and safety. Therefore, play must be controlled within a suitable range. For this reason, play is usually tested before vehicles leave the factory. Furthermore, play may change during vehicle use, so it is also checked periodically or irregularly to ensure it remains within the appropriate range.

[0043] In existing technologies, the detection of steering wheel play or turn angle typically involves using a dummy shaft. This means a temporary detection shaft (dummy shaft) is installed at the center axis of the steering wheel, perpendicular to the steering wheel, with its center normal coinciding with the center normal of the steering wheel's center axis. By measuring the turn angle of the detection shaft, the steering wheel's rotation angle is obtained, thus determining the play. However, this method is highly dependent on the precise installation position of the detection shaft. It's difficult for the center normal of the detection shaft to truly coincide with the center normal of the steering wheel, and whether they do coincide depends on the measurer's experience. A misalignment directly affects the accuracy of the play measurement. Therefore, existing measurement methods generally suffer from high operational difficulty and poor measurement accuracy.

[0044] Furthermore, when measuring the steering wheel turn angle, it is also necessary to measure the tire turn angle. Currently, there is a lack of effective methods for detecting the tire's rotation angle.

[0045] Based on the above, this application discloses a steering angle measuring device, which can be used to detect the steering angle of a steering wheel, such as... Figures 2-3 As shown, the measuring axis 1 can be horizontally and movably connected, including:

[0046] Clamping component 3 is used to clamp the test piece;

[0047] The transmission component 4 is disposed on the clamping component 3 and can drive the clamping component 3 to expand or contract in the horizontal direction;

[0048] The clamping assembly 3 is provided with a first connector 2 in the direction of the expanding movement, and the first connector 2 is used to horizontally and movably connect the measuring shaft 1.

[0049] When it is necessary to test the steering wheel's turn angle and play, the test piece is the steering wheel. Measuring shaft 1 is horizontally connected to the first connecting member 2. When the device is placed on the steering wheel, measuring shaft 1 and the steering wheel are on the same plane. The transmission assembly 4 drives the clamping assembly 3 to retract horizontally until the clamping assembly 3 clamps the steering wheel, thus fixing the steering wheel and the turn angle measuring device. At this time, when the steering wheel rotates, measuring shaft 1 also changes position. The rotation angle of measuring shaft 1 can then be directly measured to obtain the steering wheel's turn angle and play. During this process, since measuring shaft 1 does not need to coincide with the steering wheel's normal, the operation is more convenient and the measurement is more accurate. When the test is complete, the transmission assembly 4 then drives the clamping assembly 3 to expand horizontally, causing the turn angle measuring device to separate from the steering wheel, thus removing the turn angle measuring device from the steering wheel. Specifically, measuring shaft 1 and the first connecting member 2 are connected by a threaded connection.

[0050] In some embodiments, such as Figures 1-3 As shown, the clamping component 3 includes:

[0051] The first substrate 31 and the second substrate 32 are movably connected vertically.

[0052] At least three sets of linkage rods 33, one end of each set of linkage rods 33 is movably connected to the first substrate 31, and the other end is movably connected to the second substrate 32;

[0053] The number of clamping columns 34, which are the same as the number of linkage rod groups 33, are vertically arranged below each linkage component and used to clamp the tested part.

[0054] At least one of the clamping columns 34 is provided with the first connecting member 2 in the direction of the expanding movement.

[0055] In this application, the first substrate 31 and the second substrate 32 are arranged vertically and movably connected. Each set of linkage rods 33 is movably connected to both the first substrate 31 and the second substrate 32. Therefore, when the second substrate 32 rotates, it can drive the linkage rods 33 to move in tandem. The clamping columns 34 located below the linkage rods 33 will also move horizontally in an expanding motion away from each other or a contracting motion towards each other. When the clamping columns 34 move away from each other, the rotation angle measuring device is separated from the measured object. When the clamping columns 34 move closer to each other, the rotation angle measuring device is fixed to the measured object. At the same time, since the clamping columns 34 are used to contact and clamp the steering wheel, the first connecting member 2 is provided on the clamping columns 34. After horizontally connecting the measuring shaft 1, the measuring shaft 1 can be located on the same plane as the steering wheel, or almost on the same plane, resulting in more accurate detection. Specifically, the first substrate 31 and the second substrate 32 are movably connected by a fixed shaft. The first substrate 31 is fixed on the fixed shaft, and the second substrate 32 is movably connected to the fixed shaft. The movable connection can be achieved by hinge or other movable connection methods, and there is no specific limitation.

[0056] In some embodiments, such as Figure 1 , 3 As shown, each of the linkage rod groups 33 includes a first linkage rod 331 and a second linkage rod 332 arranged vertically.

[0057] One end of the first linkage rod 331 is movably connected to the second linkage rod 332, and the other end is movably connected to the first substrate 31; the other end of the second linkage rod 332 is movably connected to the second substrate 32.

[0058] The clamping column 34 is provided at the connection point between the second linkage rod 332 and the first linkage rod 331.

[0059] When the second base plate 32 rotates, it drives the second linkage rod 332 to move, which in turn drives the first linkage rod 331 to move. This causes the clamping columns 34 positioned on the second linkage rod 332 to move closer to or further apart from each other. Specifically, when the angle between the first linkage rod 331 and the second linkage rod 332 gradually increases, the clamping columns 34 move closer to each other, meaning the clamping assembly 3 shrinks in the horizontal direction. Conversely, when the angle between the first linkage rod 331 and the second linkage rod 332 gradually decreases, the clamping columns 34 move further apart, meaning the clamping assembly 3 expands in the horizontal direction.

[0060] In some embodiments, the first substrate 31 and the second substrate 32 are each provided with the same number of hinge points as the linkage group 33, and the hinge points on the first substrate 31 and the hinge points on the second substrate 32 are staggered.

[0061] Each linkage rod group 33 has a first linkage rod 331 and a second linkage rod 332, both of which include a first hinge end and a second hinge end. The second hinge ends of the two linkage rods are hinged together. The first hinge end of the first linkage rod 331 is connected to a hinge point of the first substrate 31, and the second hinge end of the second linkage rod 332 is connected to a hinge point of the second substrate 32.

[0062] In some embodiments, such as Figure 1 , 3 As shown in Figure 4, when the clamping assembly 3 is reduced to its minimum position, each set of linkage rods 33 connects to another hinge point on the second base plate 32 in a clockwise direction; or, when the clamping assembly 3 is reduced to its minimum position, each set of linkage rods 33 connects to another hinge point on the second base plate 32 in a counterclockwise direction. Through this connection method, there is a certain distance between the first hinge ends of the first linkage rod 331 and the second linkage rod 332, and the angle between the first linkage rod 331 and the second linkage rod 332 is also relatively large. The angle between the first linkage rod 331 and the second linkage rod 332 can vary within a large range, thereby increasing the expansion degree of the clamping assembly 3 and allowing the distance between the clamping columns 34 to be increased to a greater extent, thus accommodating more test pieces of different sizes.

[0063] In some embodiments, such as Figure 1 , 3 As shown, the transmission assembly 4 includes a turbine (not shown) and a worm gear 41 that cooperate with each other. The worm gear 41 is disposed on the first base plate 31, and the turbine is fixedly connected to the second base plate 32 and located between the first base plate 31 and the second base plate 32.

[0064] The worm gear 41 drives the turbine to rotate, the turbine rotation drives the second base plate 32 to rotate, and the second base plate 32 rotation drives the clamping column 34 to expand away from each other or shrink towards each other in the horizontal direction.

[0065] When it is necessary to measure the steering wheel's rotation angle or play, the worm gear 41 is rotated, which drives the turbine to rotate. The turbine rotation drives the second base plate 32 to rotate, and the second base plate 32 rotation drives the second linkage rod 332 to move. This, in turn, causes the clamping column 34 to move away from each other or move closer to each other in the horizontal direction, thereby achieving the clamping and separation of the steering wheel.

[0066] In some embodiments, such as Figure 2As shown, at least one of the clamping columns 34 has an arc-shaped concave surface 341 on the side facing the clamping assembly 3 in the direction of its contraction movement. Since steering wheels are typically arc-shaped for easy gripping by the driver, the clamping column 34 that contacts and clamps the steering wheel is provided with an arc-shaped concave surface 341. The arc-shaped concave surface 341 matches the arc of the steering wheel, allowing the device to better clamp the steering wheel and achieve better fixation.

[0067] In some embodiments, such as Figure 1 , 3 As shown, first connecting rods 35, in the same number as the linkage rod group 33, are evenly arranged around the first substrate 31. One end of each first connecting rod 35 is connected to the first substrate 31, and the other end is movably connected to a first linkage rod 331. The first substrate 31 and the first linkage rod 331 are connected through the first connecting rods 35. Specifically, the first connecting rod 35 and the first substrate 31 are fixedly connected, or the first connecting rod 35 and the first substrate 31 can be integrally formed; there is no specific limitation.

[0068] In some embodiments, such as Figure 1 , 3 As shown, second connecting rods 36 are evenly arranged around the second substrate 32 in the same number as the linkage rod group 33. One end of each second connecting rod 36 is fixedly connected to the second substrate 32, and the other end is movably connected to a second linkage rod 332. The second substrate 32 and the second linkage rod 332 are connected through the second connecting rods 36. Specifically, the second connecting rod 36 and the second substrate 32 are fixedly connected, or the second connecting rod 36 and the second substrate 32 can be integrally formed; there is no specific limitation.

[0069] This application also discloses another helix angle measuring device, which can be used to detect the helix angle of a tire, such as... Figures 1-4 As shown, the measuring axis 1 can be vertically and movably connected, including:

[0070] The fixing component 5 and the clamping component 3 are arranged vertically. The fixing component 5 is vertically movable and connected to the measuring axis 1 on the side away from the clamping component 3. The clamping component 3 is used to clamp the measured object.

[0071] The transmission component 4 is disposed on the clamping component 3 and can drive the clamping component 3 to expand or contract in the horizontal direction.

[0072] When it is necessary to detect the helix angle of a tire, the test piece is the tire. The measuring shaft 1 is vertically connected to the fixing component 5. When the device is placed on the tire, the measuring shaft 1 is perpendicular to the tire. The transmission component 4 drives the clamping component 3 to retract until the clamping component 3 clamps the tire, thus fixing the tire and the helix angle measuring device. At this time, the measuring shaft 1 is perpendicular to the tire. When the tire rotates, the measuring shaft 1 will also rotate. The rotation angle of the tire can be obtained by directly measuring the rotation angle of the measuring shaft 1. This achieves the measurement of the tire's rotation angle. When the test is completed, the transmission component 4 drives the clamping component 3 to expand, causing the helix angle measuring device to separate from the tire, thereby removing the helix angle measuring device from the tire.

[0073] In some embodiments, such as Figures 1-4 As shown, the clamping component 3 includes:

[0074] The first substrate 31 and the second substrate 32 are movably connected vertically, and the top surface of the first substrate 31 is connected to the fixing component 5.

[0075] At least three sets of linkage rods 33, one end of each set of linkage rods 33 is movably connected to the first substrate 31, and the other end is movably connected to the second substrate 32;

[0076] The number of clamping columns 34, which are the same as the number of linkage rod groups 33, are vertically arranged below each linkage component and are used to clamp the tested part.

[0077] In this application, the first substrate 31 and the second substrate 32 are arranged vertically and interconnected. Each set of linkage rods 33 is movably connected to the first substrate 31 and the second substrate 32. Therefore, when the second substrate 32 rotates, it can drive the linkage rods 33 to move in tandem. The clamping columns 34 arranged below the linkage rods 33 will also move in the horizontal direction to expand away from each other or to shrink towards each other. When the clamping columns 34 move away from each other, the rotation angle measuring device is separated from the tire under test. When the clamping columns 34 move closer to each other, the rotation angle measuring device is fixed to the tire under test.

[0078] In some embodiments, such as Figures 1-4 As shown, the fixing component 5 includes a third base plate 51 and a second connecting member 52. The third base plate 51 is disposed above the second base plate 32, and the second connecting member 52 is vertically disposed above the third base plate 51 and can be vertically and movably connected to the measuring shaft 1. The vertical connection of the measuring shaft 1 is achieved by setting the third base plate 51 and the second connecting member 52. Specifically, the measuring shaft 1 and the second connecting member 52 are movably connected by a threaded connection.

[0079] In some embodiments, such as Figures 1-4As shown, at least two third connecting rods 53 are provided on the third base plate 51, and the fixing assembly 5 further includes at least two sets of adjustment units 54. At least one set of adjustment units 54 is provided on the free end of each third connecting rod 53, and each set of adjustment units 54 includes:

[0080] Rotary adjustment component 541;

[0081] The adjusting bolt (not shown in the figure) that cooperates with the rotary adjusting member 541 has its lower end connected to the first base plate 31, and its upper end passes through the corresponding third connecting rod 53 and is movably connected to the corresponding rotary adjusting member 541.

[0082] Spring 542 is sleeved on the corresponding adjusting bolt and elastically supports the third connecting rod 53.

[0083] When the measuring shaft 1 is not perpendicular to the tire, it can be adjusted by the adjusting unit 54 to make the measuring shaft 1 perpendicular to the tire. The rotating adjusting component 541 is threaded with the adjusting bolt. When the measuring shaft 1 is not perpendicular to the tire, the rotating adjusting component 541 can be rotated downwards or upwards. When the rotating adjusting component 541 moves downwards, the corresponding third connecting rod 53 moves downwards, compressing the spring 542; when the rotating adjusting component 541 moves upwards, the pressure applied to the third connecting rod 53 disappears, and the spring 542 applies elastic force to the third connecting rod 53, causing the corresponding third connecting rod 53 to move upwards. When one side of the third connecting rod 53 moves downwards or upwards, the third connecting rod 53 will cause the third base plate 51 to tilt to a certain extent, causing the second connecting component 52 on the third base plate 51 to also tilt, thereby adjusting the angle between the measuring shaft 1 and the tire, making the measuring shaft 1 perpendicular to the tire, and ensuring measurement accuracy.

[0084] In some embodiments, such as Figure 1 , 3 As shown in Figure 4, each linkage group 33 includes a first linkage 331 and a second linkage 332 arranged vertically.

[0085] One end of the first linkage rod 331 is movably connected to the second linkage rod 332, and the other end is movably connected to the first substrate 31; the other end of the second linkage rod 332 is movably connected to the second substrate 32.

[0086] The clamping column 34 is provided at the connection point between the second linkage rod 332 and the first linkage rod 331.

[0087] In some embodiments, the transmission assembly 4 includes a turbine and a worm gear 41 that cooperate with each other. The worm gear 41 is disposed on the first substrate 31, and the turbine is fixedly connected to the second substrate 32 and located between the first substrate 31 and the second substrate 32.

[0088] The worm gear 41 drives the turbine to rotate, the turbine rotation drives the second base plate 32 to rotate, and the second base plate 32 rotation drives the clamping column 34 to expand away from each other or shrink towards each other in the horizontal direction.

[0089] When it is necessary to measure the tire's helix angle or play, the worm gear 41 is rotated, which drives the turbine to rotate. The turbine rotation drives the second base plate 32 to rotate, which in turn drives the second linkage rod 332 to move. This, in turn, causes the clamping column 34 to move away from each other or move closer to each other in the horizontal direction, thereby achieving the clamping and separation of the tire.

[0090] In some embodiments, such as Figure 2 As shown, at least one of the clamping columns 34 has an arc-shaped concave surface 341 on the side facing the clamping assembly 3 in the direction of its shrinking movement. Since the surface of the tire is arc-shaped, the arc-shaped concave surface 341 can cooperate with the arc to a certain extent, so that the device can better clamp the tire and achieve better fixation.

[0091] In some embodiments, such as Figure 1 , 3 As shown in Figure 4, first connecting rods 35 are evenly arranged around the first substrate 31 in the same number as the linkage rod group 33. One end of each first connecting rod 35 is connected to the first substrate 31, and the other end is movably connected to a first linkage rod 331.

[0092] In some embodiments, such as Figure 1 , 3 As shown, second connecting rods 36 are evenly arranged around the second base plate 32 in the same number as the linkage rod group 33. One end of each second connecting rod 36 is fixedly connected to the second base plate 32, and the other end is movably connected to a second linkage rod 332.

[0093] In some embodiments, each of the clamping posts 34 is connected to an extension rod. Due to the width of the tire, when testing the tire's turn angle, an extension rod can be connected to each clamping post 34. By connecting the extension rod to the clamping post 34, the device can be more securely fixed, making it less likely to slip or move during tire rotation, and resulting in more accurate measurements.

[0094] This application also discloses another helix angle measuring device, which can be used to detect the helix angle of a steering wheel or tire, such as... Figures 1-4 As shown, the device can be vertically or horizontally movably connected to the measuring axis 1, and can also be vertically and horizontally movably connected to the measuring axis 1 simultaneously, including:

[0095] The fixing component 5 and the clamping component 3 are arranged vertically. The fixing component 5 is vertically movable and connected to the measuring axis 1 on the side away from the clamping component 3. The clamping component 3 is used to clamp the measured object.

[0096] The transmission component 4 is disposed on the clamping component 3 and can drive the clamping component 3 to expand or contract in the horizontal direction;

[0097] The clamping assembly 3 is provided with a first connector 2 in the direction of the expanding movement, and the first connector 2 is used to horizontally and movably connect the measuring shaft 1.

[0098] When it is necessary to test the steering wheel's turn angle and play, the test piece is the steering wheel, and the measuring shaft 1 is horizontally connected to the first connecting member 2. When it is necessary to test the tire's turn angle, the test piece is the tire, and the measuring shaft 1 is vertically connected to the fixing assembly 5. Then, the transmission assembly 4 drives the clamping assembly 3 to retract until the clamping assembly 3 clamps the test piece, thus fixing the test piece to the turn angle measuring device. At this time, when the test piece rotates, the measuring shaft 1 will also rotate. The rotation angle of the test piece can be obtained by directly measuring the rotation angle of the measuring shaft 1. This achieves the measurement of the turn angle of the test piece. When the test is completed, the transmission assembly 4 drives the clamping assembly 3 to expand, causing the turn angle measuring device to separate from the test piece, thereby removing the turn angle measuring device from the test piece.

[0099] The three types of rotation angle measuring devices disclosed in this application can accurately measure the rotation angle of a steering wheel or tire. The device is fixed to the measured part (i.e., the steering wheel or tire) via a clamping assembly 3. The measuring shaft 1 is connected to the rotation angle measuring device. By measuring the rotation angle of the measuring shaft 1, the rotation angle of the steering wheel or tire can be obtained. The operation is simple and the angle measurement is accurate. Simultaneously, the clamping assembly 3 consists of three sets of linkage rods 33. Each linkage rod set 33 includes a first linkage rod 331 and a second linkage rod 332. Rotating the worm gear 41 drives the second base plate 32 to rotate, thereby driving the second linkage rod 332 to move, which in turn drives the first linkage rod 331 to move. This allows the clamping columns 34 to move away from or towards each other, achieving clamping or loosening of the steering wheel or tire, thus fixing the device to the steering wheel or tire.

[0100] Those skilled in the art should understand that the discussion of any of the above embodiments is merely exemplary and is not intended to imply that the scope of this disclosure (including the claims) is limited to these examples; within the framework of this invention, the technical features of the above embodiments or different embodiments can also be combined, the steps can be implemented in any order, and there are many other variations of the different aspects of the invention as described above, which are not provided in the details for the sake of brevity.

[0101] The embodiments of this invention are intended to cover all such substitutions, modifications, and variations falling within the broad scope of the appended claims. Therefore, any omissions, modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this invention should be included within the scope of protection of this invention.

Claims

1. A rotary angle measuring device, characterized by The measuring shaft can be horizontally connected, comprising: A clamping assembly for clamping the measured object; A transmission assembly arranged on the clamping assembly and capable of driving the clamping assembly to expand or contract in the horizontal direction; The clamping assembly is provided with a first connecting piece in the direction of expansion, which is used to horizontally connect the measuring shaft; The clamping assembly comprises: A first base plate and a second base plate connected vertically; At least three groups of linkage rods, one end of each group of linkage rods is connected with the first base plate, and the other end is connected with the second base plate; A clamping column consistent with the number of linkage rod groups is vertically arranged below each group of linkage rod groups and used to clamp the measured object; At least one of the clamping columns is provided with a first connecting piece in the direction of expansion; Each group of linkage rods comprises a first linkage rod and a second linkage rod arranged vertically; One end of the first linkage rod is connected with the second linkage rod, and the other end is connected with the first base plate, and the other end of the second linkage rod is connected with the second base plate; The second linkage rod is provided with the clamping column at the connection with the first linkage rod; The first base plate and the second base plate are provided with hinge points consistent with the number of linkage rod groups, and the hinge points of the first base plate are arranged in a staggered manner with the hinge points of the second base plate; The first linkage rod and the second linkage rod of each linkage rod group comprise a first hinge end and a second hinge end, the second hinge ends of the two linkage rods are hingedly arranged, the first hinge end of the first linkage rod is connected with a hinge point of the first base plate, and the second hinge end of the second linkage rod is connected with another hinge point of the second base plate across a hinge point of the second base plate.

2. A rotary angle measuring device according to claim 1, characterized in that The transmission assembly comprises a turbine and a worm that cooperate with each other, the worm is arranged on the first base plate, and the turbine is fixedly connected with the second base plate and located between the first base plate and the second base plate; The worm drives the turbine to rotate, the turbine drives the second base plate to rotate, and the second base plate drives the clamping columns to expand or contract in the horizontal direction.

3. A rotary angle measuring device according to claim 1, characterized in that At least one of the clamping columns is provided with an arc-shaped concave surface on the side facing the direction of contraction of the clamping assembly.

4. A rotary angle measuring device according to claim 1, characterized in that A first connecting rod consistent with the number of linkage rod groups is uniformly arranged around the first base plate, one end of each first connecting rod is connected with the first base plate, and the other end is connected with a first linkage rod; And / or, a second connecting rod consistent with the number of linkage rod groups is uniformly arranged around the second base plate, one end of each second connecting rod is fixedly connected with the second base plate, and the other end is connected with a second linkage rod.

5. A rotary angle measuring device, characterized by The measuring shaft can be vertically connected, comprising: A fixed assembly and a clamping assembly arranged vertically, the fixed assembly is vertically connected with the measuring shaft on the side away from the clamping assembly, and the clamping assembly is used to clamp the measured object; A transmission assembly is arranged on the embracing assembly and can drive the embracing assembly to expand or contract in the horizontal direction; The embracing assembly comprises: A first base plate and a second base plate movably connected, the upper top surface of the first base plate is connected with the fixing assembly; At least three groups of linkage rods, one end of each group of linkage rods is movably connected with the first base plate, and the other end is movably connected with the second base plate; An embracing column consistent with the number of linkage rod groups is arranged vertically below each group of linkage rod groups and is used to embrace the measured member; Each group of linkage rod groups comprises a first linkage rod and a second linkage rod arranged vertically; One end of the first linkage rod is movably connected with the second linkage rod, and the other end is movably connected with the first base plate, and the other end of the second linkage rod is movably connected with the second base plate; The second linkage rod is provided with the embracing column at the connection position with the first linkage rod; The first base plate and the second base plate are provided with hinge points consistent with the number of linkage rod groups, and the hinge points of the first base plate are arranged in a staggered manner with the hinge points of the second base plate; The first linkage rod and the second linkage rod of each group of linkage rod groups comprise a first hinge end and a second hinge end, the second hinge ends of the two linkage rods are hingedly arranged, the first hinge end of the first linkage rod is connected with a hinge point of the first base plate, and the second hinge end of the second linkage rod is connected with another hinge point of the second base plate across a hinge point of the second base plate.

6. A rotary angle measuring device according to claim 5, characterised in that The fixing assembly comprises a third base plate and a second connecting piece, the third base plate is arranged above the second base plate, and the second connecting piece is arranged vertically above the third base plate and can be movably connected with the measuring shaft vertically.

7. A rotary angle measuring device according to claim 6, characterised in that The third base plate is provided with at least two third connecting rods, and the fixing assembly further comprises at least two groups of adjusting units, at least one group of adjusting units is arranged on the free end of each third connecting rod, and each group of adjusting units comprises: A rotating adjusting member; An adjusting bolt matched with the rotating adjusting member, the lower end of the adjusting bolt is connected with the first base plate, and the upper end of the adjusting bolt passes through the corresponding third connecting rod and is movably connected with the corresponding rotating adjusting member; A spring is sleeved on the corresponding adjusting bolt and elastically supports the third connecting rod.

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