Device for measuring approach and departure angles of a vehicle

Abstract

This invention discloses a vehicle approach and departure angle measuring device. The device includes a chassis, a rotating structure, a drive mechanism, and a measuring structure. The rotating structure includes a first connecting rod and two rotating arms, which are rotatably connected to the chassis. The first connecting rod connects between the two rotating arms, and a slide rail is provided at the top of each rotating arm. The drive structure includes a first drive assembly and a second drive assembly. The measuring structure includes a measuring plate supported on the two rotating arms, with a groove at its bottom. The first drive assembly drives the rotating arms to rotate relative to the chassis, thereby rotating the measuring plate relative to the chassis, adjusting the tilt angle of the measuring plate, and causing the top of the measuring plate to abut against the vehicle's floor. The second drive assembly drives the measuring plate to abut against or dismount from the vehicle's tires. The vehicle approach and departure angle measuring device of this invention has high measurement accuracy.

Description

Technical Field

[0001] This invention relates to the field of automotive technology, and more particularly to a device for measuring the approach and departure angles of a vehicle. Background Technology

[0002] The approach and departure angles of a vehicle are important indicators reflecting its off-road performance. Both parameters must be tested during vehicle evaluation and acceptance. The approach angle is the maximum angle between the ground plane and the plane tangent to the front wheel tires, while the departure angle is the maximum angle between the ground plane and the plane tangent to the rear wheel tires. It is located behind the rear axle of the vehicle, and all points and rigid components of the vehicle lie on this plane.

[0003] Existing vehicle approach and departure angle measuring devices measure these angles by rotating a measuring plate relative to the device's chassis. During measurement, the chassis must be in contact with the bottom of the vehicle's tires, and the measuring plate must rotate relative to the chassis to measure the maximum angle between the ground plane and the tire's tangent plane. However, when measuring approach and departure angles for longer vehicles, the chassis may be too short to reach the bottom of the tires, complicating the measurement. Furthermore, due to the chassis's height and the measuring plate's placement on top, the clamping distance between the measuring plate and the ground plane is crucial for accurate approach and departure angle measurements. This limitation often prevents the measuring plate from directly contacting the bottom of the tires, leading to deviations in the measured angles and resulting in low accuracy. Summary of the Invention

[0004] The main objective of this invention is to provide a vehicle approach angle and departure angle measuring device, which aims to solve the technical problem of low measurement accuracy in existing vehicle approach angle and departure angle measuring devices.

[0005] To achieve the above objectives, the present invention provides a measuring device for vehicle approach angle and departure angle, the measuring device comprising:

[0006] Chassis, the chassis including a first side and a second side disposed laterally opposite to each other;

[0007] A rotating structure includes a first connecting rod and two rotating arms. The two rotating arms are arranged longitudinally at intervals and are respectively located on both sides of the chassis. The rotating arms extend laterally and are rotatably connected to the chassis. The first connecting rod is connected between the two rotating arms. Each rotating arm has a slide rail extending laterally at its top.

[0008] A driving structure, the driving structure including a first driving component and a second driving component;

[0009] The measuring structure includes a measuring plate, which has a contact side and a free side arranged laterally opposite to each other. The contact side is located on the same side as the second side, and the free side is located on the same side as the first side. The measuring plate is supported on two rotating arms. The bottom of the measuring plate is provided with a sliding groove corresponding to the position of each slide rail, which is slidably connected to the slide rail. The first driving component is used to drive the rotating arms to rotate relative to the chassis, and drive the measuring plate to rotate relative to the chassis, so that the free side rises and falls relative to the contact side, thereby adjusting the tilt angle of the measuring plate and making the top of the measuring plate abut against the vehicle's floor. The second driving component is used to drive the measuring plate to move along the slide rail in a direction away from or towards the first side, so that the contact side abuts or disengages from the vehicle's tire.

[0010] Optionally, the second drive assembly includes a longitudinally extending rotating rod, with its two ends rotatably passing through the two rotating arms respectively. The bottom of the measuring plate is provided with a transversely extending rack, and a gear meshing with the rack is sleeved on the rotating rod. Rotating the rotating rod drives the rack and the measuring plate to move closer to or away from the first side via the gear.

[0011] Optionally, the measuring structure further includes a locking assembly, which includes a ratchet and a locking member. One end of the rotating rod extends outward from the corresponding rotating arm and forms an extension. The ratchet is sleeved on the extension, and the locking member is used to lock or unlock the ratchet.

[0012] Optionally, the number of locking components is two, namely a first pawl and a second pawl, which are respectively disposed on both sides of the extension portion in the lateral direction. The two ratchet wheels are respectively a first ratchet wheel and a second ratchet wheel, which are longitudinally spaced and sleeved on the extension portion. The first pawl is used to extend into or disengage between any two adjacent teeth of the first ratchet wheel to lock or unlock the first ratchet wheel accordingly. The second pawl is used to extend into or disengage between any two adjacent teeth of the second ratchet wheel to lock or unlock the second ratchet wheel accordingly.

[0013] Optionally, a handle is connected to the end of the extension away from the rotating arm. A first operating lever and a second operating lever are respectively connected to the top of the first pawl and the second pawl. The first pawl and the second pawl are rotatably connected to the outside of the rotating arm. The first pawl is used to rotate relative to the rotating arm under the drive of the first operating lever to extend into or disengage between any two adjacent teeth of the first ratchet. The second pawl is used to rotate relative to the rotating arm under the drive of the second operating lever to extend into or disengage between any two adjacent teeth of the second ratchet.

[0014] Optionally, the first drive assembly includes a drive member, and the rotating structure further includes a second connecting rod and two transmission arms. The transmission arms extend laterally, and the two transmission arms are longitudinally spaced between the two rotating arms. The first end of the transmission arm is hinged to the chassis. The second connecting rod passes through the second end of the transmission arm and is hinged to the transmission arm. The two ends of the second connecting rod are respectively hinged to the two rotating arms. The output shaft of the drive member is hinged to one of the transmission arms near the second end. The drive member is inclined upwards in a direction away from the first side.

[0015] Optionally, the number of driving components is two, and the output shafts of the two driving components are respectively hinged to the two transmission arms near the second end.

[0016] Optionally, the driving component is a hydraulic cylinder, and the vehicle approach angle and departure angle measuring device further includes a hydraulic pump and an oil pipe, wherein the hydraulic pump is connected to the hydraulic cylinder through the oil pipe.

[0017] Optionally, the bottom of the measuring plate has an inclined surface corresponding to the position of the contact side, and the inclined surface is inclined upward in a direction away from the first side.

[0018] Optionally, the chassis has multiple wheels spaced apart at its bottom; and / or, a push-pull frame is provided on the first side of the chassis.

[0019] In the use of the vehicle approach and departure angle measuring device of the present invention, taking the measurement of the vehicle approach angle as an example, the operator moves the chassis to the front of the vehicle and causes the first drive member to drive the rotating arm to rotate relative to the chassis, thereby causing the measuring plate supported above the chassis to rotate and the free end to rise, so that the measuring plate is tilted. When the measuring plate is tilted to a certain angle, the operator uses the second drive member to drive the measuring plate to move away from the first end. Since the measuring plate is slidably mounted above the rotating arm, the contact side of the measuring plate can cross the second side away from the first side, so that the contact end of the measuring plate abuts against the bottom of the vehicle's front tire. Then, the operator continues to drive the first drive member to drive the rotating arm to rotate relative to the chassis, so that the free end continues to rise until the measuring plate abuts against the vehicle's floor. At this time, the angle formed by the measuring plate and the ground plane is the maximum angle between the front tire of the vehicle and the tangent plane of the ground plane, that is, the vehicle's approach angle. The operator can use an angle measuring instrument placed above the measuring plate to obtain the value of this approach angle. The process of measuring the vehicle's departure angle is similar to that of measuring the vehicle's approach angle. In the vehicle approach and departure angle measuring device of this invention, the measuring plate can move laterally relative to the chassis. During the measurement of the vehicle's approach and departure angles, the measuring plate can contact the bottom of the vehicle's tires, thereby improving the accuracy of the measurement and achieving accurate measurement of the vehicle's approach and departure angles. Attached Figure Description

[0020] 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 the structures shown in these drawings without creative effort.

[0021] Figure 1 This is a schematic diagram of a vehicle approach angle and departure angle measuring device according to an embodiment of the present invention;

[0022] Figure 2 For Figure 1 Enlarged structural diagram of region A in the middle;

[0023] Figure 3 for Figure 1 A schematic diagram of the structure after the measuring plate of the lieutenant general is hidden;

[0024] Figure 4 For Figure 3 Enlarged structural diagram of the middle section;

[0025] Figure 5 This is a schematic diagram of the structure of the rotating arm, the transmission arm, and the second connecting rod in one embodiment of the present invention.

[0026] Appendix Figure 1 Label Explanation:

[0027]

[0028]

[0029] The realization of the objective, functional features and advantages of the present invention will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0030] The technical solutions in this embodiment will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0031] Furthermore, in this invention, descriptions involving "first," "second," etc., are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this invention, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0032] In this invention, unless otherwise explicitly specified and limited, the terms "connection," "fixed," etc., should be interpreted broadly. For example, "fixed" can mean a fixed connection, a detachable connection, or an integral part; it can mean a mechanical connection or an electrical connection; it can mean a direct connection or an indirect connection through an intermediate medium; it can mean the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0033] Furthermore, the technical solutions of the various embodiments of the present invention can be combined with each other, but only if they are feasible to those skilled in the art. If a combination of technical solutions contradicts each other or cannot be implemented, such a combination should be considered non-existent and not within the scope of protection claimed by the present invention. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

[0034] The present invention proposes a measuring device 100 for vehicle approach angle and departure angle.

[0035] Please refer to Figures 1 to 5The vehicle approach and departure angle measuring device 100 of this embodiment includes a chassis 1, a rotating structure 2, a drive structure 3, and a measuring structure 4. The chassis 1 includes a first side 11 and a second side 12 arranged laterally opposite each other. The rotating structure 2 includes a first connecting rod 21 and two rotating arms 22. The two rotating arms 22 are arranged longitudinally at intervals and are respectively located on both sides of the chassis 1. The rotating arms 22 extend laterally and are rotatably connected to the chassis 1. The first connecting rod 21 is connected between the two rotating arms 22. Each rotating arm 22 has a laterally extending slide rail 221 at its top. The drive structure 3 includes a first drive assembly and a second drive assembly. The measuring structure 4 includes a measuring plate 41, which includes a laterally opposite contact side 411 and a free side 412. The abutting side 411 is set on the same side as the second side 12, and the free side 412 is set on the same side as the first side 11. The measuring plate 41 is supported on two rotating arms 22. The bottom of the measuring plate 41 is provided with a sliding groove 4131 that is slidably connected to the sliding rail 221 at the corresponding position. The first drive assembly is used to drive the rotating arm 22 to rotate relative to the chassis 1 and drive the measuring plate 41 to rotate relative to the chassis 1, so that the free side 412 is raised and lowered relative to the abutting side 411, thereby adjusting the tilt angle of the measuring plate 41 and making the top of the measuring plate 41 abut against the vehicle floor. The second drive assembly is used to drive the measuring plate 41 to move along the sliding rail 221 away from or closer to the first side 11, so that the abutting side 411 abuts against or disengages from the vehicle tire.

[0036] In the technical solution of this embodiment, the horizontal direction is... Figure 1 The left and right directions and the vertical direction shown are Figure 1 The front-back direction shown is vertical. Figure 1The vehicle approach and departure angle measuring device 100 shown in the diagram includes a chassis 1, a rotating structure 2, a drive structure 3, and a measuring structure 4. The chassis 1 supports the rotating structure 2, drive structure 3, and measuring structure 4. The chassis 1 includes a first side 11 and a second side 12 arranged opposite each other in the left-right direction, with the first side 11 to the left of the second side 12. The rotating structure 2 includes a first connecting rod 21 and two rotating arms 22. The first connecting rod 21 connects the two rotating arms 22, which are spaced apart in the front-rear direction and located on the front and rear sides of the chassis 1. The rotating arms 22 extend in the left-right direction. Since the rotating arms 22 are hinged to the chassis 1 and can rotate relative to it, "extending in the left-right direction" means that the rotating arms 22 are in a horizontal state. The first connecting rod 21 connects the two rotating arms 22, allowing them to rotate relative to the chassis 1. During rotation, they can rotate synchronously. Each rotating arm 22 is provided with a slide rail 221 extending in the left and right direction at its top. The slide rail 221 is provided at the top of the rotating arm 22 along its length direction. The bottom of the measuring plate 41 is provided with a groove 4131. Specifically, a slider 413 can be connected to the bottom of the measuring plate 41 at the position corresponding to the two slide rails 221. The bottom of the slider 413 can be provided with a groove 4131, or the groove 4131 can be directly provided at the bottom of the measuring plate 41. In this embodiment, it is preferable to connect the slider 413 to the bottom of the measuring plate 41. By providing the slider 413, the length of the groove 4131 that needs to be provided can be reduced. The groove 4131 can slide relative to the slide rail 221, so that the measuring plate 41 can slide relative to the chassis 1 in the left and right direction. The drive structure 3 includes a first drive member 311 and a second drive member 311. The measuring plate 41 includes an abutment side and a free side 412 arranged opposite to each other. The free side 412 is provided with the left side of the abutment side. The measuring plate 41 is supported on two rotating arms 22.In this embodiment, when using the vehicle approach and departure angle measuring device 100, taking the measurement of the vehicle approach angle as an example, the operator moves the chassis 1 to the front of the vehicle and causes the first drive member 311 to drive the rotating arm 22 to rotate relative to the chassis 1, thereby causing the measuring plate 41 supported above the chassis 1 to rotate and the free end to rise, so that the measuring plate 41 is tilted. When the measuring plate 41 is tilted to a certain angle, this angle can be the approach angle of the approaching vehicle. The operator then uses the second drive member 311 to drive the measuring plate 41 to move away from the first end 241. Since the measuring plate 41 is slidably mounted above the rotating arm 22, the contact side 411 of the measuring plate 41 can move to the right side of the second side 12 of the chassis 1, so that the contact end of the measuring plate 41 contacts the bottom of the vehicle's front tire. Then, the operator continues to drive the rotating arm 22 relative to the chassis 1 with the first drive member 311, causing the free end to continue rising until the measuring plate 41 contacts the vehicle's floor. At this point, the angle formed by the measuring plate 41 and the ground plane is the maximum angle between the front tire of the vehicle and the tangent plane of the ground plane, i.e., the vehicle's approach angle. The operator can use an angle measuring instrument placed above the measuring plate 41 to obtain the value of this approach angle. Understandably, the process of measuring the vehicle's departure angle is similar to that of measuring the vehicle's approach angle. During the measurement of the vehicle's departure angle, the operator moves the chassis 1 to the rear of the vehicle and causes the first drive member 311 to drive the rotating arm 22 to rotate relative to the chassis 1, thereby rotating the measuring plate 41 supported above the chassis 1 and raising its free end to tilt the measuring plate 41. When the measuring plate 41 tilts to a certain angle, this angle can be considered the departure angle of the approaching vehicle. The operator then uses the second drive member 311 to drive the measuring plate 41 away from the first end 241. The measuring plate 41 is slidably mounted above the rotating arm 22, so the contact side 411 of the measuring plate 41 can move to the right side of the second side 12 of the chassis 1, so that the contact end of the measuring plate 41 abuts against the bottom of the vehicle's rear tire. Then, the operator continues to drive the rotating arm 22 to rotate relative to the chassis 1 by the first drive member 311, so that the free end continues to rise until the measuring plate 41 abuts against the vehicle's floor. At this time, the angle formed by the measuring plate 41 and the ground plane is the maximum angle between the rear tire of the vehicle and the tangent plane of the ground plane, that is, the departure angle of the vehicle. In the vehicle approach angle and departure angle measuring device in this embodiment, the measuring plate 41 can move laterally relative to the chassis 1. During the measurement of the vehicle approach angle and departure angle, the measuring plate 41 can connect with the bottom of the vehicle tire, thereby improving the accuracy of the measurement and realizing the accurate measurement of the vehicle approach angle and departure angle.

[0037] Furthermore, the second drive assembly includes a rotating rod 321 extending longitudinally, with both ends of the rotating rod 321 rotatably passing through two rotating arms 22. A rack 414 extending laterally is provided at the bottom of the measuring plate 41, and a gear 3211 meshing with the rack 414 is sleeved on the rotating rod 321. Rotating the rotating rod 321 drives the rack 414 and the measuring plate 41 to move closer to or further away from the first side 11 via the gear 3211. In this embodiment, the second drive includes a rotating rod 321 extending in the front-rear direction. Both ends of the rotating rod 321 pass through two rotating arms 22, and the rotating rod 321 is rotatable relative to the rotating arms 22. A rack 414 is provided at the bottom of the measuring plate 41, and a gear 3211 is fitted onto the rotating rod 321. The rack 414 meshes with the gear 3211. When the rotating rod 321 rotates, the gear 3211 above the rotating rod 321 rotates. After rotation, the gear 3211 drives the rack 414 located at the bottom of the measuring plate 41 to move in the left-right direction, thereby realizing the movement of the measuring plate 41. In other embodiments, the second drive component 311 can also be a cylinder. A cylinder can be used to drive the sliding groove 4131 at the bottom of the measuring plate 41 to slide relative to the slide rail 221 to realize the movement of the measuring plate 41. This embodiment does not limit this. By employing the cooperation of rotating rod 321, rack 414 and gear 3211, the rotation of rotating rod 321 is converted into the movement of measuring plate 41, which improves the flexibility of measuring plate 41 during movement and thus enhances the ease of use of the vehicle approach angle and departure angle measuring device 100 in this embodiment.

[0038] Furthermore, the measuring structure 4 also includes a locking assembly 42, which includes a ratchet and a locking member. One end of the rotating rod 321 extends outward from the corresponding rotating arm 22 to form an extension 3212. The ratchet is fitted onto the extension 3212, and the locking member is used to lock or unlock the ratchet. In this embodiment, one end of the rotating rod 321 extends outward from the corresponding rotating arm 22. In other words, the front end of the rotating rod 321 extends outward from the rotating arm 22 located on the front side, or the rear end of the rotating arm 22 extends outward from the rotating arm 22 located on the rear side. The rotating arm 22 extends outward from the corresponding rotating arm 22 to form the extension 3212, and the ratchet is fitted onto the extension 3212. The locking member locks or unlocks the ratchet, preventing the slide groove 4131 at the bottom of the measuring plate 41 from sliding relative to the slide rail 221 when the operator does not need to move the measuring plate 41 in the left-right direction, thus affecting the accuracy of the measurement during the approach and departure angle measurements.

[0039] Specifically, there are two locking components 42, namely a first pawl 423 and a second pawl 424. The first pawl 423 and the second pawl 424 are respectively disposed on both sides of the extension 3212 along the lateral direction. There are two ratchet wheels, namely a first ratchet wheel 421 and a second ratchet wheel 422. The first ratchet wheel 421 and the second ratchet wheel 422 are longitudinally spaced and sleeved on the extension 3212. The first pawl 423 is used to extend into or disengage between any two adjacent teeth of the first ratchet wheel 421 to lock or unlock the first ratchet wheel 421 accordingly. The second pawl 424 is used to extend into or disengage between any two adjacent teeth of the second ratchet wheel 422 to lock or unlock the second ratchet wheel 422 accordingly. In this embodiment, as shown... Figure 3 As shown, there are two locking components 42, namely a first pawl 423 and a second pawl 424. The first pawl and the second pawl 424 are respectively provided on the left and right sides of the extension portion 3212. The two ratchet wheels are the first ratchet wheel 421 and the second ratchet wheel 422, which are spaced apart in the front-to-back direction. In this embodiment, the teeth of the first ratchet wheel 421 and the second ratchet wheel 422 are in the shape of tooth peaks, and the teeth have a large angle of inclination. The inclined surfaces 415 of the teeth of the first ratchet wheel 421 and the second ratchet wheel 422 are arranged in opposite directions. The shape of the first pawl 423 matches that of the first ratchet wheel 421. When the first pawl 423 is engaged between any two adjacent teeth of the first ratchet wheel 421, the first ratchet wheel 421... Figure 3 When the first ratchet 421 rotates clockwise, the first pawl 423 restricts its rotation. When the first ratchet 421 rotates counterclockwise, its inclined surface 415, due to the inclined teeth, allows it to slide across the end of the first pawl 423, thus allowing the first ratchet 421 to rotate. The shape of the second pawl 424 matches that of the second ratchet 422. When the second pawl 424 engages between any two adjacent teeth of the second ratchet 422, the second ratchet 422 rotates as follows: Figure 3 When rotated counterclockwise, the second pawl 424 restricts the rotation of the second ratchet 422. When the second ratchet 422 rotates clockwise, the inclined surface 415 of the second ratchet 422 can slide over the end of the second pawl 424 due to the inclined teeth, so that the second ratchet 422 can rotate. By setting two locking components 42 and two ratchets, it is easy to lock and unlock the rotating rod 321, which increases the flexibility of the vehicle approach angle and departure angle measuring device 100 in this embodiment.

[0040] More specifically, a handle 3213 is connected to the end of the extension 3212 away from the rotating arm 22. A first operating lever 425 and a second operating lever 426 are respectively connected to the tops of the first pawl 423 and the second pawl 424. Both the first pawl 423 and the second pawl 424 are rotatably connected to the outside of the rotating arm 22. The first pawl 423 is used to rotate relative to the rotating arm 22 under the action of the first operating lever 425 to insert or disengage between any two adjacent teeth of the first ratchet 421. The second pawl 424 is used to rotate relative to the rotating arm 22 under the action of the second operating lever 426 to insert or disengage between any two adjacent teeth of the second ratchet 422. In this embodiment, as... Figure 3 As shown, a handle 3213 is connected to the front end of the extension 3212. The handle 3213 is perpendicular to the extension 3212. A first operating lever 425 is connected to the top of the first pawl 423 and the second pawl 424, and a second operating lever 426 is connected to the top of the second pawl 424. The first operating lever 425 and the second operating lever 426 are rotatably connected to the outside of the rotating arm 22. Because the first ratchet 421 and the first pawl 423 restrict the clockwise rotation of the rotating lever 321, the second ratchet 422... The second pawl 424 restricts the counterclockwise rotation of the rotating rod 321. Therefore, when the rotating rod 321 needs to rotate clockwise, the operator can operate the first operating lever 425 to disengage the first pawl 423 from the teeth of the first ratchet 421. When the rotating rod 321 needs to rotate counterclockwise, the operator can operate the second operating lever 426 to disengage the second pawl 424 from the teeth of the second ratchet 422, further increasing the flexibility of unlocking or locking the rotating rod 321. The structure is reasonably designed. In other embodiments, a drive motor can also be used to drive the rotating rod 321 to rotate; this specification does not limit this embodiment.

[0041] In one embodiment, the first drive assembly includes a drive member 311, and the rotating structure 2 further includes a second connecting rod 23 and two transmission arms 24. The transmission arms 24 extend laterally, and the two transmission arms 24 are longitudinally spaced between the two rotating arms 22. The first end 241 of the transmission arm 24 is hinged to the chassis 1. The second connecting rod 23 passes through the second end 242 of the transmission arm 24 and is hinged to the transmission arm 24. The two ends of the second connecting rod 23 are respectively hinged to the two rotating arms 22. The output shaft of the drive member 311 is hinged to one of the transmission arms 24 near the second end 242. The drive member 311 is inclined upward in a direction away from the first side 11. In this embodiment, the first end 241 of the transmission arm 24 is hinged to the chassis 1. The second connecting rod 23 is located between the two transmission arms 24. The front and rear ends of the second connecting rod 23 pass through the second ends 242 of the two transmission arms 24 respectively, and continue to pass through the two rotating arms 22. The second connecting rod 23 is rotatably connected to the two rotating arms 22 respectively. The output shaft of the drive member 311 can be hinged to one of the transmission arms 24 near the second end 242 of the transmission arm 24. The drive member 311 is located on the left side of the transmission arm 24. The drive member 311 is tilted to the right and upward. When the output shaft of the drive member 311 extends, the output shaft of the drive member 311 extends to the upper right and drives the second connecting rod 23 and the rotating arm 22 to rotate upward relative to the chassis 1 through the transmission arm 24, thereby realizing the upward rotation of the free end of the measuring plate 41 set above the rotating arm 22.

[0042] Furthermore, there are two drive components 311. The output shafts of the two drive components 311 are respectively hinged to the two transmission arms 24 near the second end 242. In this embodiment, by setting two drive components 311 to drive the two transmission arms 24 respectively, the dispersion of driving force can be increased, thereby reducing the burden on the transmission arms 24, increasing the service life of the transmission arms 24, and increasing the safety of driving.

[0043] Furthermore, the drive component 311 is a hydraulic cylinder 312, and the vehicle approach and departure angle measuring device 100 also includes a hydraulic pump 313 and oil pipes. The hydraulic pump 313 is connected to the hydraulic cylinder 312 via the oil pipes. In this embodiment, the drive component 311 is a hydraulic cylinder 312. Because the hydraulic cylinder 312 has a simple design and compact structure, and uses liquid as a medium, compared with other transmission methods, such as mechanical transmission, the hydraulic system has lower wear and failure rate, longer service life, and higher reliability. In other embodiments, the drive component 311 can also be a pneumatic cylinder.

[0044] In one embodiment, an inclined surface 415 is formed at the bottom of the measuring plate 41 corresponding to the position of the contact side 411. The inclined surface 415 is inclined upward in a direction away from the first side 11. In this embodiment, the inclined surface 415 on the contact side of the measuring plate 41 facilitates the rise of the free side 412 of the measuring plate 41 and the better contact between the contact side 411 and the ground when the contact side 411 descends, thereby improving the measurement accuracy of the vehicle approach angle and departure angle measuring device 100 in this embodiment.

[0045] Furthermore, the bottom of the chassis 1 is provided with a plurality of wheels 13 spaced apart; and / or, the first side 11 of the chassis 1 is provided with a push-pull frame 14. In this embodiment, the wheels 13 on the bottom wall of the chassis 1 facilitate the movement of the chassis 1 and increase the flexibility of the vehicle approach angle and departure angle measuring device 100. The push-pull frame 14 on the first side 11 of the chassis 1 facilitates the movement of the operator, and the structure is reasonably designed.

[0046] The above are merely preferred embodiments of the present invention and do not limit the scope of the patent. Any equivalent structural transformations made using the contents of the specification and drawings of the present invention under the inventive concept of the present invention, or direct / indirect applications in other related technical fields, are included within the scope of patent protection of the present invention.

Claims

1. A device for measuring the approach angle and departure angle of a vehicle, characterized in that, include: A chassis, the chassis including a first side and a second side disposed laterally opposite to each other; A rotating structure includes a first connecting rod and two rotating arms. The two rotating arms are arranged longitudinally at intervals and are respectively located on both sides of the chassis. The rotating arms extend laterally and are rotatably connected to the chassis. The first connecting rod is connected between the two rotating arms. Each rotating arm has a slide rail extending laterally at its top. A driving structure, the driving structure including a first driving component and a second driving component; The measuring structure includes a measuring plate, which has a contact side and a free side arranged laterally opposite to each other. The contact side is located on the same side as the second side, and the free side is located on the same side as the first side. The measuring plate is supported on two rotating arms. The bottom of the measuring plate is provided with a sliding groove corresponding to each of the slide rails, which is slidably connected to the slide rails. The first driving component is used to drive the rotating arms to rotate relative to the chassis, and drive the measuring plate to rotate relative to the chassis, so that the free side rises and falls relative to the contact side, thereby adjusting the tilt angle of the measuring plate and making the top of the measuring plate abut against the vehicle's floor. The second driving component is used to drive the measuring plate to move along the slide rails in a direction away from or towards the first side, so that the contact side abuts against or disengages from the vehicle's tires. The second drive assembly includes a longitudinally extending rotating rod, with its two ends rotatably passing through the two rotating arms. A transversely extending rack is provided at the bottom of the measuring plate, and a gear meshing with the rack is sleeved on the rotating rod. Rotating the rotating rod drives the rack and the measuring plate to move closer to or further away from the first side via the gear. The measuring structure also includes a locking assembly, which includes a ratchet and a locking member. One end of the rotating rod extends outward from the corresponding rotating arm and forms an extension. The ratchet is sleeved on the extension. The locking member is used to lock or unlock the ratchet. The locking assembly consists of two locking components: a first pawl and a second pawl, which are respectively disposed on opposite sides of the extension portion along the lateral direction. The two ratchet wheels are a first ratchet and a second ratchet, which are longitudinally spaced and fitted onto the extension portion. The first pawl is used to extend into or disengage between any two adjacent teeth of the first ratchet to lock or unlock the first ratchet; the second pawl is used to extend into or disengage between any two adjacent teeth of the second ratchet to lock or unlock the second ratchet. A handle is connected to the end of the extension away from the rotating arm. A first operating lever and a second operating lever are respectively connected to the top of the first pawl and the second pawl. The first pawl and the second pawl are rotatably connected to the outside of the rotating arm. The first pawl is used to rotate relative to the rotating arm under the drive of the first operating lever to extend into or disengage between any two adjacent teeth of the first ratchet. The second pawl is used to rotate relative to the rotating arm under the drive of the second operating lever to extend into or disengage between any two adjacent teeth of the second ratchet.

2. The vehicle approach angle and departure angle measuring device as described in claim 1, characterized in that, The first drive assembly includes a drive member, and the rotating structure further includes a second connecting rod and two transmission arms. The transmission arms extend laterally, and the two transmission arms are longitudinally spaced between the two rotating arms. The first end of the transmission arm is hinged to the chassis. The second connecting rod passes through the second end of the transmission arm and is hinged to the transmission arm. The two ends of the second connecting rod are respectively hinged to the two rotating arms. The output shaft of the drive member is hinged to one of the transmission arms near the second end. The drive member is inclined upwards in a direction away from the first side.

3. The vehicle approach angle and departure angle measuring device as described in claim 2, characterized in that, The number of driving components is two, and the output shafts of the two driving components are respectively hinged to the two transmission arms near the second end.

4. The vehicle approach angle and departure angle measuring device as described in claim 2, characterized in that, The driving component is a hydraulic cylinder, and the vehicle approach angle and departure angle measuring device further includes a hydraulic pump and an oil pipe, with the hydraulic pump connected to the hydraulic cylinder through the oil pipe.

5. The vehicle approach angle and departure angle measuring device as described in claim 1, characterized in that, The bottom of the measuring plate has an inclined surface corresponding to the contact side, and the inclined surface is inclined upward in a direction away from the first side.

6. The vehicle approach angle and departure angle measuring device as described in claim 1, characterized in that, The chassis has multiple wheels spaced apart at the bottom; and / or, a push-pull frame is provided on the first side of the chassis.

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