measuring device

Abstract

The application provides a measuring device. The measuring device comprises a measuring device, a measuring body and a bearing structure, the bearing structure has a bearing part for bearing a tire to be measured, the bearing part is arranged in a lifting manner, the bearing part drives a deflated tire to perform a lifting movement to adjust a height to be adjusted of the deflated tire to an initial height H1; the bearing structure is arranged on the measuring body, the measuring body measures a bearing gravity of the tire to be measured by measuring a pressure value applied on the bearing structure; wherein the height to be adjusted of the initial state tire on the bearing part has a minimum height H3, and the initial height H1, a maximum height drop value H2 and the minimum height H3 satisfy (H3-H2)≤H1. The application effectively solves the problem that a single wheel load instrument in the prior art cannot measure the single wheel position bearing weight of a vehicle.

Description

Technical Field

[0001] This invention relates to the field of vehicle testing technology, and more specifically, to a measuring device. Background Technology

[0002] Currently, in the process of vehicle handling testing, wear testing, high-performance vehicle development and chassis tuning, the vehicle needs to be weighted and adjusted according to the test requirements to ensure that the load-bearing capacity of each wheel position can meet the expected design requirements. At this time, it is necessary to measure the overall weight of the vehicle and the load-bearing weight of each wheel (i.e., the load-bearing weight of a single wheel position. In fact, due to the uneven distribution of vehicle mass, it is not possible to simply understand one-quarter of the overall weight of the vehicle as the load-bearing weight of a single wheel position).

[0003] In the existing technology, the common measurement methods for the above-mentioned overall weight and single wheel load-bearing weight are as follows:

[0004] Method 1: Use four wheel load cells and four sets of metal ramp supports. Combine the two in an open area and position them according to the vehicle's wheel track and wheelbase. The driver then parks the vehicle on the four wheel load cells (one wheel position corresponds to one wheel load cell), and then take the corresponding measurements (the measurement result of a single wheel load cell is the load-bearing weight of a single wheel position, and the sum of the measurement results of the four wheel load cells is the overall weight of the vehicle).

[0005] Method 2: After lifting the vehicle to a certain height using a four-wheel alignment lift, place it directly onto the four wheel load testers that have been positioned correctly, and then take measurements.

[0006] As can be seen, the above measurement method requires, on the one hand, precise positioning of the wheel load cell to reduce errors caused by eccentric loading; on the other hand, it uses four wheel load cells matching the number of tires on the vehicle. The reason for using wheel load cells matching the number of tires is that the wheel load cells have a certain thickness. If only one or a few wheel load cells are used to measure the load-bearing weight of some tires, a height difference will occur between the axle of the tire being measured and the axle of the tire not being measured (i.e., the vehicle tilts), leading to deviations in the measurement results. In other words, a single wheel load cell cannot measure the load-bearing weight of a single wheel position on a vehicle; they must be used in combination according to the number of tires. This greatly reduces the efficiency of measuring the load-bearing weight of a single wheel position (multiple wheel load cells must be precisely positioned, and the actual placement position often needs to be constantly adjusted during the placement process). This defect is particularly pronounced for medium and large trucks (with up to 22 or more wheels), seriously affecting the overall efficiency of vehicle testing. Summary of the Invention

[0007] The main objective of this invention is to provide a measuring device to solve the problem that a single wheel load cell in the prior art cannot measure the load-bearing weight of a single wheel of a vehicle.

[0008] To achieve the above objectives, the present invention provides a measuring device for measuring the load-bearing weight of a vehicle tire. The height of the axle connection of the tire under test is the height to be adjusted. The tire under test includes an initial state tire and a deflated state tire. The height to be adjusted for the initial state tire is the initial height H1, and the height to be adjusted for the deflated state tire has a maximum height drop value H2. The measuring device includes a measuring unit, comprising a measuring body and a bearing structure. The bearing structure has a bearing portion for supporting the tire under test. The bearing portion is vertically and vertically mounted. The bearing portion adjusts the height to be adjusted for the deflated state tire to the initial height H1 by driving the deflated state tire to move vertically. The bearing structure is mounted on the measuring body. The measuring body measures the load-bearing weight of the tire under test by measuring the pressure value applied to it by the bearing structure. The height to be adjusted for the initial state tire located on the bearing portion has a minimum height H3. The initial height H1, the maximum height drop value H2, and the minimum height H3 satisfy the following condition: (H3-H2)≤H1.

[0009] Furthermore, the measuring body includes: a base structure having a clearance notch that penetrates the base structure, the clearance notch being used to avoid the tire to be tested, at least a portion of the base structure being inserted under the tire to be tested through the clearance notch, and a load-bearing structure being disposed on this portion of the base structure.

[0010] Furthermore, the bearing portion has a bearing surface for bearing the tire to be tested, the shape of which matches the tread shape of the tire to be tested for contact with the tread; wherein, there are at least two bearing structures, and the bearing surfaces of the at least two bearing structures are arranged opposite to each other to form a bearing space for bearing the tire to be tested, the bearing space being connected to the clearance notch.

[0011] Furthermore, the base structure is plate-shaped and includes at least two interconnected mounting plate segments and a connecting plate segment. The at least two mounting plate segments are arranged opposite each other, and the connecting plate segment is located between the two oppositely arranged mounting plate segments to connect the two oppositely arranged mounting plate segments. An avoidance gap is formed around the at least two mounting plate segments and the connecting plate segment. The mounting plate segments are used for mounting the load-bearing structure. When the base structure is inserted under the tire to be tested, at least a portion of the mounting plate segment is located under the tire to be tested, and the connecting plate segment is located on one side of the tire to be tested.

[0012] Furthermore, the support part is block-shaped, and at least part of the outer surface of the support part forms a support surface. The support structure also includes a drive part, which is disposed on the mounting plate segment and drivenly connected to the support part. The drive part is used to drive the support part to perform lifting and lowering movements.

[0013] Furthermore, the base structure has a mounting recess, the driving part is a driving cylinder, and the measuring body also includes: a measuring element, at least a portion of which is disposed in the mounting recess, at least a portion of which is disposed in the mounting recess, the driving cylinder abutting against the measuring element and located above the measuring element.

[0014] Furthermore, the driving unit is a driving cylinder, and the piston rod of the driving cylinder is drivenly connected to the bearing unit. The measuring device also includes: a first detection element, which is set on the base structure. The measuring end of the first detection element is set opposite to the preset surface of the tire to be tested to detect the height change value of the preset surface; and a control module, which is connected to both the driving cylinder and the first detection element. The control module controls the piston rod to extend or retract according to the detection value of the first detection element.

[0015] Furthermore, the measuring device also includes a second detection element, which is disposed on the inner wall of the clearance gap. The second detection element detects whether the tire to be tested is separated from the parking surface of the vehicle by detecting whether the tire to be tested is present at a preset height.

[0016] Furthermore, the measuring equipment also includes an air supply device and a pipeline assembly. The pipeline assembly includes: a first control valve, one port of which is connected to the outside to form a pressure relief port; the first control valve and the second control valve are connected; a main pipeline through which the air supply device is connected to the first control valve; a first branch pipeline through which the first control valve is connected to the inflation port of the tire under test; the main pipeline, the first branch pipeline, and the pressure relief port are optionally connected via the first control valve and the second control valve; wherein, when the first branch pipeline is connected to the pressure relief port, the tire under test releases gas through the pressure relief port; when the main pipeline is connected to the first branch pipeline, the air supply device inflates the tire under test.

[0017] Furthermore, the measuring device also includes a gas-liquid converter, the liquid supply end of which is connected to the drive unit for supplying liquid to the drive unit. The piping assembly also includes a second branch pipe, through which the gas-liquid converter is connected to a second control valve. The gas supply device, the pressure relief port, and the second branch pipe are selectively connected via a first control valve and a second control valve. When the gas supply device is connected to the second branch pipe, the gas supply device supplies gas to the gas-liquid converter, and the gas-liquid converter begins to supply liquid. When the gas-liquid converter is connected to the pressure relief port, the gas-liquid converter discharges gas through the pressure relief port to stop the liquid supply.

[0018] According to the technical solution of this invention, the measuring device is used to measure the load-bearing weight of a vehicle's tire. The height of the axle connection of the tire under test is the height to be adjusted. The tire under test includes an initial state tire and a deflated state tire. The height to be adjusted for the initial state tire is the initial height H1, and the height to be adjusted for the deflated state tire has a maximum height drop value H2. The measuring device of the measuring equipment includes a measuring body and a bearing structure. The bearing structure has a bearing part for supporting the tire under test. The bearing part is vertically and vertically mounted. The bearing part adjusts the height to be adjusted to the initial height H1 by driving the deflated state tire to move vertically. The bearing structure is mounted on the measuring body. The measuring body measures the load-bearing weight of the tire under test by measuring the pressure value applied to it by the bearing structure. The height to be adjusted for the initial state tire located on the bearing part has a minimum height H3. The initial height H1, the maximum height drop value H2, and the minimum height H3 satisfy the following condition: (H3-H2)≤H1. In this way, this application cleverly utilizes the characteristic that the height of the axle connection of a liftable load-bearing unit decreases when the tire is deflated (in its deflated state). This allows the height of a single tire to be adjusted to its initial height H1 (consistent with the heights of other tires not being measured) during measurement through the deflation and lifting process. This ensures that the vehicle body does not tilt when measuring the weight-bearing capacity of a single tire, thus ensuring that the measured value is essentially consistent with the actual value. Simultaneously, the size limits between the initial height H1, the maximum height decrease H2, and the minimum height H3 ensure that the height of the tire to be adjusted can be reached to the initial height H1. This solves the problem in existing technologies where a single wheel load cell cannot measure the load-bearing capacity of a single wheel position, allowing personnel to perform targeted measurements of the load-bearing capacity of a single wheel position, greatly improving measurement efficiency. Attached Figure Description

[0019] The accompanying drawings, which form part of this application, are used to provide a further understanding of the invention. The illustrative embodiments of the invention and their descriptions are used to explain the invention and do not constitute an undue limitation of the invention. In the drawings:

[0020] Figure 1 A schematic diagram of the overall structure of an embodiment of the measuring device according to the present invention is shown;

[0021] Figure 2 It shows Figure 1 Exploded view of the measuring device in the measuring equipment.

[0022] The above figures include the following reference numerals:

[0023] 10. Measuring device;

[0024] 11. Measuring body; 111. Base structure; 1111. Clearance notch; 1112. Mounting plate segment; 1113. Connecting plate segment; 1114. Mounting recess; 1115. Receiving groove; 112. Limiting structure;

[0025] 12. Load-bearing structure; 121. Load-bearing part; 1211. Load-bearing surface; 122. Load-bearing space; 123. Drive unit;

[0026] 13. First detection component; 131. Support structure; 132. Displacement sensor; 14. Second detection component;

[0027] 20. Gas supply device;

[0028] 30. Piping assembly; 31. First control valve; 32. Second control valve; 33. Main pipeline; 34. First branch pipeline; 35. Second branch pipeline; 36. Oil pipeline;

[0029] 40. Gas-liquid converter;

[0030] 50. Control module. Detailed Implementation

[0031] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other. The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0032] It should be noted that, unless otherwise specified, all technical and scientific terms used in this application have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains.

[0033] In this invention, unless otherwise stated, directional terms such as "up" and "down" are generally used in relation to the direction shown in the accompanying drawings, or in relation to the vertical, perpendicular, or gravitational direction; similarly, for ease of understanding and description, "left" and "right" are generally used in relation to the left and right shown in the accompanying drawings; "inner" and "outer" refer to the inner and outer contours of each component itself, but the above directional terms are not intended to limit this invention.

[0034] To address the problem that existing wheel load meters cannot measure the load-bearing weight of a single wheel of a vehicle, this application provides a measuring device.

[0035] like Figure 1 and Figure 2As shown, the measuring device is used to measure the load-bearing weight of a vehicle's tire. The height of the axle connection of the tire under test is the height to be adjusted. The tire under test includes an initial state tire and a deflated state tire. The height to be adjusted for the initial state tire is the initial height H1, and the height to be adjusted for the deflated state tire has a maximum height drop value H2. The measuring device includes a measuring unit 10, which includes a measuring body 11 and a supporting structure 12. The supporting structure 12 has a supporting part 121 for supporting the tire under test. The supporting part 121 is vertically and vertically mounted. The supporting part 121 adjusts the height to be adjusted to the initial height H1 by driving the deflated state tire to move up and down. The supporting structure 12 is mounted on the measuring body 11. The measuring body 11 measures the pressure value applied to it by the supporting structure 12 to measure the load-bearing weight of the tire under test. The height to be adjusted for the initial state tire located on the supporting part 121 has a minimum height H3. The initial height H1, the maximum height drop value H2, and the minimum height H3 satisfy the following condition: H3 - H2 ≤ H1.

[0036] Using the technical solution of this embodiment, the measuring device is used to measure the load-bearing weight of a vehicle's tire. The height of the axle connection of the tire under test is the height to be adjusted. The tire under test includes an initial state tire and a deflated state tire. The height to be adjusted for the initial state tire is the initial height H1, and the height to be adjusted for the deflated state tire has a maximum height drop value H2. The measuring device 10 of the measuring device includes a measuring body 11 and a bearing structure 12. The bearing structure 12 has a bearing part 121 for bearing the tire under test. The bearing part 121 is vertically and vertically arranged. The bearing part 121 drives the deflated state tire to move up and down to adjust the height to be adjusted for the deflated state tire to the initial height H1. The bearing structure 12 is set on the measuring body 11. The measuring body 11 measures the pressure value applied to it by the bearing structure 12 to measure the load-bearing weight of the tire under test. Among them, the height to be adjusted for the initial state tire located on the bearing part 121 has a minimum height H3. The initial height H1, the maximum height drop value H2, and the minimum height H3 satisfy the following condition: (H3-H2)≤H1. In this way, this embodiment cleverly utilizes the characteristic that the height (height to be adjusted) of the axle connection of the liftable bearing unit 121 decreases after the tire is deflated (in the deflated state). This allows the height to be adjusted of a single tire to be measured to its initial height H1 (consistent with the height to be adjusted of other tires not being measured) through the deflation and lifting operation. This ensures that the vehicle body does not tilt when measuring the weight borne by a single tire, thus ensuring that the measured value is basically consistent with the actual value. At the same time, the size limit between the initial height H1, the maximum height drop value H2, and the minimum height H3 ensures that the height to be adjusted of the tire to be measured can be adjusted to the initial height H1. This solves the problem in the prior art that a single wheel load cell cannot measure the load-bearing weight of a single wheel position of a vehicle, allowing operators to perform targeted measurements of the load-bearing weight of a single wheel position, greatly improving measurement efficiency.

[0037] In this embodiment, the initial state tire is a tire in normal working condition with standard tire pressure, and the deflated state tire is a tire that has undergone deflation (the tire pressure becomes smaller and the tire deforms), and the height of its axle connection will decrease.

[0038] Specifically, the deformation of a tire after deflation is limited. The maximum height drop of a deflated tire, H2, is the maximum drop at the axle connection (height to be adjusted) when the tire pressure is at its minimum.

[0039] Specifically, the support unit 121 can be raised and lowered, but its maximum lowering height is limited, and the minimum height H3 is the initial state tire height to be adjusted when the support unit 121 is lowered to the minimum height.

[0040] like Figure 1and Figure 2 As shown, the measuring body 11 includes a base structure 111 with a clearance notch 1111 penetrating through it. The clearance notch 1111 is used to avoid the tire to be tested. At least a portion of the base structure 111 is inserted under the tire to be tested through the clearance notch 1111, and a support structure 12 is disposed on this portion of the base structure 111. This arrangement allows the operator to directly insert the base structure 111 and the support structure 12 disposed on it under the tire to be tested using the clearance notch 1111. In other words, the operator does not need to use the existing method of driving a vehicle or using a four-wheel alignment lift to move the tire to be tested onto the support part 121, thus initially improving the operator's measurement efficiency. Furthermore, the operator can directly locate the position of the base structure 111 based on the position of the tire to be tested during the insertion process, further improving measurement efficiency. Meanwhile, the insertion method also ensures that the minimum height H3 of the tire to be tested (initial state tire) located on the bearing part 121 is consistent with the initial height H1 (i.e., measurement can be performed when H2≥0), thereby enabling the measuring device to measure almost all tires (except for solid tires, etc.), which greatly improves the versatility of the measuring device.

[0041] It should be noted that this embodiment only provides the optimal arrangement (insertion) of the measuring device to avoid the influence of the thickness of the measuring device on the specifications of the measurable tire (after the tire is initially placed on the support 121, its height to be adjusted will rise), so as to ensure the maximum range of measurable tires. However, if a liftable support 121 is directly set on a conventional wheel load tester, and the tire to be tested is moved to the support 121 by using a driving vehicle or a four-wheel alignment lift in the prior art, and then deflation and lifting operations are performed to adjust the height to be adjusted of the tire to be tested and then measured, then the accurate measurement of the load-bearing weight of a single wheel position can also be achieved (it is necessary to ensure that (H3-H2)≤H1). Although the above arrangement will affect the specifications and size of the measurable tire, it should still be within the protection scope of this embodiment.

[0042] like Figure 1 and Figure 2As shown, the support portion 121 has a support surface 1211 for supporting the tire under test. The shape of the support surface 1211 matches the tread shape of the tire under test for contact with the tread. There are at least two support structures 12, with the support surfaces 1211 of at least two support structures 12 arranged opposite each other to form a support space 122 for supporting the tire under test. The support space 122 is connected to the clearance notch 1111. This arrangement, on the one hand, ensures that the shape of the support space 122 matches the tread shape of the tire under test, thereby increasing the contact area and improving the stability of tire placement and lifting; on the other hand, it allows for greater flexibility and variety in the number of support structures 12 to adapt to different working conditions and usage requirements, and also improves the processing flexibility of the workers.

[0043] In this embodiment, there are two load-bearing structures 12, which are located on both sides of the tire tread. The load-bearing surface 1211 of each load-bearing structure 12 is an arc-shaped surface to match the tire tread structure.

[0044] like Figure 1 and Figure 2 As shown, the base structure 111 is plate-shaped and includes at least two interconnected mounting plate segments 1112 and connecting plate segment 1113. The at least two mounting plate segments 1112 are arranged opposite each other, and the connecting plate segment 1113 is located between the two oppositely arranged mounting plate segments 1112 to connect them. A clearance notch 1111 is formed between the at least two mounting plate segments 1112 and the connecting plate segment 1113. The mounting plate segments 1112 are used for mounting the load-bearing structure 12. When the base structure 111 is inserted under the tire to be tested, at least a portion of the mounting plate segment 1112 is located under the tire to be tested, and the connecting plate segment 1113 is located on one side of the tire to be tested. This arrangement simplifies the formation of the clearance notch 1111, making it easier to manufacture, and also achieves a lightweight design of the base structure 111, facilitating the handling of the measuring device by workers and reducing labor intensity.

[0045] In this embodiment, the base structure 111 is a thin plate structure with two mounting plate segments 1112. The two mounting plate segments 1112 and the connecting plate segment 1113 are arranged in a "U" shape, with the opening forming an avoidance notch 1111. The connecting plate segment 1113 can play a positioning role during the process of the staff placing the base structure 111. That is, when the connecting plate segment 1113 is stopped by the side of the tire, it can ensure that the two mounting plate segments 1112 and the load-bearing structure 12 located on the mounting plate segment 1112 are in the corresponding posture.

[0046] In this embodiment, the measuring body 11 also includes a limiting structure 112. The limiting structure 112 is plate-shaped and detachably mounted on two mounting plate segments 1112. After installation, the limiting structure 112 is located on the side of the bearing structure 12 away from the connecting plate segment 1113. In this way, the limiting structure 112 and the connecting plate segment 1113 can respectively limit and stop the tire from both sides. That is, after the limiting structure 112 is installed, it forms a rectangular frame structure with the base structure 111. The tire will be located within the rectangular frame, and the limiting structure will stop the tire from the circumference of the tire, which greatly improves the placement stability of the measuring body 11.

[0047] like Figure 1 and Figure 2 As shown, the support portion 121 is block-shaped, and at least a portion of its outer surface forms a support surface 1211. The support structure 12 also includes a drive portion 123, which is disposed on the mounting plate segment 1112 and drivenly connected to the support portion 121. The drive portion 123 is used to drive the support portion 121 to perform lifting and lowering movements. This configuration simplifies the structure of the support portion 121, making it easier to manufacture and reducing its manufacturing cost. Furthermore, the drive portion 123 enables automated lifting and lowering of the support portion 121.

[0048] In this embodiment, the supporting part 121 is a wedge-shaped block, and its upper surface is an arc-shaped surface (supporting surface 1211).

[0049] like Figure 1 and Figure 2 As shown, the base structure 111 has a mounting recess 1114, the drive unit 123 is a drive cylinder, and the measuring body 11 also includes a measuring element. At least a portion of the measuring element is disposed within the mounting recess 1114, and at least a portion of the drive cylinder is disposed within the mounting recess 1114. The drive cylinder abuts against the measuring element and is located above the measuring element. Thus, the above arrangement, on the one hand, enables the measuring body 11 to perform gravity measurement through the measuring element. During measurement, only a tare operation of the measuring element is needed to ensure that the measured gravity is the actual load-bearing gravity value of the tire under test. On the other hand, the mounting recess 1114 ensures reliable installation of the drive unit 123.

[0050] In this embodiment, the measuring device is a gravity sensor.

[0051] like Figure 1 and Figure 2As shown, the drive unit 123 is a drive cylinder, and the piston rod of the drive cylinder is drivenly connected to the support unit 121. The measuring device 10 also includes a first detection element 13 and a control module 50. The first detection element 13 is mounted on the base structure 111, and its measuring end is positioned opposite to a preset surface of the tire to be tested to detect the height change value of the preset surface. The control module 50 is connected to both the drive cylinder and the first detection element 13. The control module 50 controls the piston rod to extend or retract according to the detection value of the first detection element 13. In this way, the above configuration achieves intelligent execution of the lifting action through the cooperation between the first detection element 13 and the control module 50, thereby improving the intelligence level of the measuring device and reducing the labor intensity of the workers.

[0052] In this embodiment, the control module 50 is a PLC controller, which has a corresponding display screen structure and button trigger structure. The overall structure is relatively conventional and will not be described in detail here.

[0053] In this embodiment, the first detection element 13 includes a support structure 131 and a displacement sensor 132. The support structure 131 is rod-shaped and is disposed on the base structure 111, while the displacement sensor 132 is disposed on the support structure 131.

[0054] Specifically, the structure of the support structure 131 will not be described in detail here. Its actual structure can be adjusted according to the actual working conditions. It is only necessary to ensure that the displacement sensor 132 has a suitable installation height and installation position (which can be relative to the preset surface of the tire to be tested).

[0055] Specifically, since this embodiment uses the insertion base structure 111 for installation, after the measuring body 11 is placed, the tire under test is still in contact with the ground (gravity is applied to the ground). At this time, the tire under test is deflated, the tire under test deforms (switching to the deflated state tire), its height to be adjusted decreases, and the preset surface also decreases. The first detection element 13 can then detect the corresponding displacement value. The control module then controls the piston rod to extend (the length is the displacement value) according to the displacement value, and the bearing part 121 can rise by the displacement value, and the deflated state tire rises by the displacement value. That is, the height to be adjusted of the deflated state tire is readjusted to the initial height H1. The vehicle body will not tilt, and the tire is now separated from the ground. The overall gravity is applied to the bearing structure 12. The detection value of the measuring element is the gravity value borne by the tire under test (subtract the mass gravity of the tire under test accordingly).

[0056] like Figure 1 and Figure 2As shown, the measuring device 10 also includes a second detection element 14, which is disposed on the inner wall of the clearance notch 1111. The second detection element 14 detects whether the tire under test is separated from the parking surface of the vehicle by detecting whether the tire under test is present at a preset height. In this way, by setting the second detection element 14, the separation of the tire from the ground can be further detected, thereby further improving the accuracy of the measurement results of the measuring device 10.

[0057] In this embodiment, the second detection element 14 is connected to the control module 50, and the measuring element (gravity sensor) is also connected to the control module. After the control module 50 receives the second detection element 14 detecting that the tire has left the ground, the control module 50 reads the corresponding detection value from the detection element and displays it.

[0058] In this embodiment, the second detection element 14 is actually an infrared grating detection device. Its infrared emitting structure and infrared receiving structure are respectively provided with two mounting plate segments 1112 to surround the side forming the avoidance gap 1111. That is, after the measuring body 11 is placed, the tire to be tested will block the infrared light, and the infrared receiving structure will not receive the infrared light, so it is determined that the tire to be tested has not left the ground. However, when the tire to be tested rises, it no longer blocks the infrared light, and the infrared receiving structure receives the infrared light, so it is determined that the tire to be tested has left the ground.

[0059] like Figure 1 As shown, the measuring device also includes an air supply device 20 and a pipeline assembly 30. The pipeline assembly 30 includes a first control valve 31, a second control valve 32, a main pipeline 33, and a first branch pipeline 34. One port of the second control valve 32 is connected to the outside to form a pressure relief port. The first control valve 31 is connected to the second control valve 32. The air supply device 20 is connected to the first control valve 31 through the main pipeline 33. The first control valve 31 is connected to the inflation port of the tire under test through the first branch pipeline 34. The main pipeline 33, the first branch pipeline 34, and the pressure relief port are optionally connected through the first control valve 31 and the second control valve 32. When the first branch pipeline 34 is connected to the pressure relief port, the tire under test releases gas through the pressure relief port. When the main pipeline 33 is connected to the first branch pipeline 34, the air supply device 20 inflates the tire under test. Thus, the above setup, through the arrangement of the first control valve 31, the second control valve 32 and the corresponding pipelines, enables the measuring equipment to also have an inflation / deflation function, so that the tire under test can be deflated and switched to the deflated state during the measurement process, and the tire under test can be inflated and switched to the initial state after the measurement is completed, which greatly reduces the labor intensity of the staff (simply operate the control valve to switch the state).

[0060] like Figure 1As shown, the measuring device also includes a gas-liquid converter 40. The liquid supply end of the gas-liquid converter 40 is connected to the drive unit 123 for supplying liquid to the drive unit 123. The pipeline assembly 30 also includes a second branch pipeline 35. The gas-liquid converter 40 is connected to a second control valve 32 through the second branch pipeline 35. The gas supply device 20, the pressure relief port, and the second branch pipeline 35 are selectively connected through a first control valve 31 and a second control valve 32. Specifically, when the gas supply device 20 is connected to the second branch pipeline 35, the gas supply device 20 supplies gas to the gas-liquid converter 40, and the gas-liquid converter 40 begins supplying liquid. When the gas-liquid converter 40 is connected to the pressure relief port, the gas-liquid converter 40 releases gas through the pressure relief port to stop supplying liquid. Thus, the above configuration further utilizes the gas-liquid converter 40 to achieve drive action control of the drive unit 123, further reducing the labor intensity of the workers.

[0061] In this embodiment, the drive unit 123 is a hydraulic cylinder.

[0062] In this embodiment, the gas supply device 20 is an air compressor used to supply high-pressure gas.

[0063] Specifically, the gas-liquid converter 40 is a device that converts pneumatic signals into hydraulic signals through the interaction of compressed air and hydraulic oil. Its specific structure is relatively conventional and will not be described in detail here.

[0064] In this embodiment, the pipeline assembly 30 also includes an oil pipeline 36, through which the gas-liquid converter 40 is connected to the two drive units 123 to supply oil.

[0065] Specifically, the mounting plate segment 1112 is provided with a corresponding receiving groove 1115 to accommodate the oil pipeline.

[0066] In this embodiment, both the first control valve 31 and the second control valve 32 are three-way electrically controlled valves and are connected to the control module 50.

[0067] Specifically, the measuring device in this embodiment can achieve fully automated testing of the tire under test, and the specific process is as follows:

[0068] Initially, both the first control valve 31 and the second control valve 32 are closed. After the operator positions the measuring body 11 (and installs the limit structure 112), the operation control module 50 begins detection. The control module 50 first controls the first control valve 31 and the second control valve 32 to switch to the corresponding first valve position, so that the first branch pipe 34 is connected to the pressure relief port of the first control valve 31 and the second control valve 32. The tire under test begins to deflate, and the first detection element 13 begins to detect the preset descent height (displacement) of the tire under test. After the preset deflation time or descent height reaches the preset value, the control module 50 controls the first control valve 31 and the second control valve 32 to switch to the corresponding second valve position, and the tire under test stops deflation. The air supply device 20 then connects to the first control valve 31, The second control valve 32 and the second branch pipe 35 are connected to the gas-liquid converter 40. The gas supply device 20 supplies high-pressure gas to the gas-liquid converter 40. The gas-liquid converter 40 supplies liquid to the two drive units 123 through the oil pipe 36. The piston rod of the drive unit 123 extends, and the bearing unit 121 drives the tire under test to rise until the second detection element 14 detects that the tire under test is off the ground (if the tire under test is not detected to be off the ground, it means that the deflation preset time or the descent height is too small, and the tire deformation is not obvious, and it needs to be reset). After the first detection element 13 starts to detect that the preset surface rise height of the tire under test reaches the preset value, the control module 50 controls the first control valve 31 and the second control valve 32 to close and reads the measurement data of the measuring element (it can read multiple times and calculate the average value), and displays it on the corresponding screen. The measurement process is completed. After the staff confirms and records, the control module 50 can continue to perform the inflation operation. That is, the control module 50 can first control the first control valve 31 and the second control valve 32 to switch to the third valve position. The gas-liquid converter 40 is connected to the pressure relief port of the second control valve 32. The gas-liquid converter 40 is depressurized, the piston rod of the drive unit 123 retracts, and the bearing unit 121 drives the tire under test to descend to its original height. The control module 50 then controls the first control valve 31 and the second control valve 32 to switch to the fourth valve position. The air supply device 20 is connected to the tire under test through the main pipeline 33, the first control valve 31, and the first branch pipeline 34, and supplies air to the tire under test. The tire under test is then re-inflated to its initial state.

[0069] The measuring device in this embodiment has at least the following advantages:

[0070] 1. Only one measuring device is needed to measure the load-bearing weight of a single wheel position in the loaded state of vehicles such as cars (with 4 wheels) and light trucks or heavy trucks (with 4, 6 or 22 wheels). There is no need to use multiple wheel load testers in combination. It is not only highly efficient and accurate, but also reduces the cost of periodic external calibration of the platform scale.

[0071] 2. The required testing space is small, and it does not require a spacious testing environment (vehicle driving or placing a four-wheel alignment lift requires a large space), resulting in lower costs;

[0072] 3. There is no need to repeatedly adjust the placement of the measuring device according to the vehicle's wheelbase and track width (as long as the connecting plate segment 1113 and the tire side limit stop are aligned, the wheelbase and track width can be positioned simultaneously), resulting in extremely high testing efficiency.

[0073] As can be seen from the above description, the embodiments of the present invention achieve the following technical effects:

[0074] The measuring equipment is used to measure the load-bearing weight of a vehicle's tire. The height of the tire's axle connection is the height to be adjusted. The tires include an initial tire and a deflated tire. The initial height of the tire is H1, and the maximum height drop of the deflated tire is H2. The measuring device includes a measuring body and a supporting structure. The supporting structure has a support portion for supporting the tire. The support portion is vertically adjustable. The support portion adjusts the height of the deflated tire to the initial height H1 by moving the deflated tire vertically. The support structure is mounted on the measuring body. The measuring body measures the pressure applied to it by the support structure to measure the load-bearing capacity of the tire. The initial height of the tire on the support portion has a minimum height H3. The initial height H1, the maximum height drop H2, and the minimum height H3 satisfy the following relationship: (H3-H2)≤H1. In this way, this application cleverly utilizes the characteristic that the height of the axle connection of a liftable load-bearing unit decreases when the tire is deflated (in its deflated state). This allows the height of a single tire to be adjusted to its initial height H1 (consistent with the heights of other tires not being measured) during measurement through the deflation and lifting process. This ensures that the vehicle body does not tilt when measuring the weight-bearing capacity of a single tire, thus ensuring that the measured value is essentially consistent with the actual value. Simultaneously, the size limits between the initial height H1, the maximum height decrease H2, and the minimum height H3 ensure that the height of the tire to be adjusted can be reached to the initial height H1. This solves the problem in existing technologies where a single wheel load cell cannot measure the load-bearing capacity of a single wheel position, allowing personnel to perform targeted measurements of the load-bearing capacity of a single wheel position, greatly improving measurement efficiency.

[0075] Obviously, the embodiments described above are merely some, not all, embodiments of the present invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort should fall within the scope of protection of the present invention.

[0076] It should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the exemplary embodiments according to this application. As used herein, the singular form is intended to include the plural form as well, unless the context clearly indicates otherwise. Furthermore, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0077] It should be noted that the terms "first," "second," etc., used in the specification, claims, and accompanying drawings of this application are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate so that the embodiments of this application described herein can be implemented in sequences other than those illustrated or described herein.

[0078] The above description is merely a preferred embodiment of the present invention and is not intended to limit the invention. Various modifications and variations can be made to the present invention by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. A measuring device for measuring the load-bearing weight of a tire of a vehicle, wherein the height of the axle connection of the tire under test is the height to be adjusted, the tire under test includes an initial state tire and a deflated state tire, the height to be adjusted of the initial state tire is an initial height H1, and the height to be adjusted of the deflated state tire has a maximum height decrease value H2, characterized in that, The measuring device includes: The measuring device (10) includes a measuring body (11) and a support structure (12). The support structure (12) has a support part (121) for supporting the tire to be tested. The support part (121) is vertically and vertically arranged. The support part (121) adjusts the height of the deflated tire to the initial height H1 by driving the deflated tire to move up and down. The load-bearing structure (12) is disposed on the measuring body (11), and the measuring body (11) measures the weight-bearing capacity of the tire under test by measuring the pressure value applied thereon by the load-bearing structure (12); The initial state tire located on the bearing part (121) has a minimum height H3 to be adjusted. The initial height H1, the maximum height decrease value H2 and the minimum height H3 satisfy the following condition: (H3-H2)≤H1.

2. The measuring device according to claim 1, characterized in that, The measuring body (11) includes: The base structure (111) has a clearance notch (1111) that runs through the base structure (111) and the clearance notch (1111) is used to avoid the tire under test. At least a portion of the base structure (111) is inserted under the tire under test through the clearance notch (1111) and the bearing structure (12) is disposed on the portion of the base structure (111).

3. The measuring device according to claim 2, characterized in that, The bearing portion (121) has a bearing surface (1211) for bearing the tire to be tested, the shape of the bearing surface (1211) matching the tread shape of the tire to be tested for contact with the tread. There are at least two load-bearing structures (12), and the load-bearing surfaces (1211) of at least two load-bearing structures (12) are arranged opposite to each other to form a load-bearing space (122) for bearing the tire under test, and the load-bearing space (122) is connected to the clearance notch (1111).

4. The measuring device according to claim 3, characterized in that, The base structure (111) is plate-shaped and includes at least two mounting plate segments (1112) and a connecting plate segment (1113) that are connected to each other. The at least two mounting plate segments (1112) are arranged opposite to each other, and the connecting plate segment (1113) is located between the two oppositely arranged mounting plate segments (1112) to connect the two oppositely arranged mounting plate segments (1112). The at least two mounting plate segments (1112) and the connecting plate segment (1113) surround each other to form the clearance notch (1111). The mounting plate segments (1112) are used for mounting the load-bearing structure (12). When the base structure (111) is inserted below the tire to be tested, at least a portion of the mounting plate segment (1112) is located below the tire to be tested, and the connecting plate segment (1113) is located on one side of the tire to be tested.

5. The measuring device according to claim 4, characterized in that, The supporting part (121) is block-shaped, and at least a portion of the outer surface of the supporting part (121) forms the supporting surface (1211). The supporting structure (12) further includes a driving part (123), which is disposed on the mounting plate segment (1112) and drivenly connected to the supporting part (121). The driving part (123) is used to drive the supporting part (121) to perform lifting and lowering movements.

6. The measuring device according to claim 5, characterized in that, The base structure (111) has a mounting recess (1114), the driving part (123) is a driving cylinder, and the measuring body (11) further includes: The measuring element, at least a portion of which is disposed within the mounting recess (1114), and at least a portion of which is disposed within the mounting recess (1114), the driving cylinder abutting against the measuring element and located above the measuring element.

7. The measuring device according to claim 5, characterized in that, The driving unit (123) is a driving cylinder, and the piston rod of the driving cylinder is drivingly connected to the bearing unit (121). The measuring device (10) also includes: A first detection element (13) is disposed on the base structure (111). The measuring end of the first detection element (13) is disposed opposite to the preset surface of the tire to be tested, so as to detect the height change value of the preset surface. The control module (50) is connected to both the drive cylinder and the first detection element (13). The control module (50) controls the piston rod to extend or retract according to the detection value of the first detection element (13).

8. The measuring device according to claim 2, characterized in that, The measuring device (10) further includes: The second detection element (14) is disposed on the inner wall of the avoidance gap (1111). The second detection element (14) detects whether the tire under test is separated from the parking surface of the vehicle by detecting whether the tire under test is present at a preset height.

9. The measuring device according to claim 5, characterized in that, The measuring device further includes a gas supply device (20) and a pipeline assembly (30), the pipeline assembly (30) comprising: First control valve (31), The second control valve (32) has one port connected to the outside to form a pressure relief port; the first control valve (31) is connected to the second control valve (32); The main pipeline (33) is used to connect the gas supply device (20) to the first control valve (31). The first branch pipe (34) is connected to the inflation port of the tire under test through the first branch pipe (34); the main pipe (33), the first branch pipe (34) and the pressure relief port are optionally connected through the first control valve (31) and the second control valve (32); When the first branch pipe (34) is connected to the pressure relief port, the tire under test discharges gas through the pressure relief port; when the main pipe (33) is connected to the first branch pipe (34), the air supply device (20) inflates the tire under test.

10. The measuring device according to claim 9, characterized in that, The measuring device further includes a gas-liquid converter (40), the liquid supply end of which is connected to the drive unit (123) for supplying liquid to the drive unit (123). The pipeline assembly (30) further includes: The second branch pipe (35) is connected to the second control valve (32) through the gas-liquid converter (40). The gas supply device (20), the pressure relief port and the second branch pipe (35) can be selectively connected through the first control valve (31) and the second control valve (32). When the gas supply device (20) is connected to the second branch pipeline (35), the gas supply device (20) supplies gas to the gas-liquid converter (40), and the gas-liquid converter (40) starts supplying liquid; when the gas-liquid converter (40) is connected to the pressure relief port, the gas-liquid converter (40) discharges gas through the pressure relief port to stop supplying liquid.

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