Calibration device for automatic tire pattern depth measuring instrument

Abstract

This invention belongs to the technical field of tire measuring devices and discloses a calibration device for an automatic tire tread depth measuring instrument. The device includes a base frame for mounting on the surface of the automatic tire tread depth measuring instrument to be calibrated; a calibration device body positioned above the instrument, with at least one standard tread depth groove on the tread surface of the calibration device body; a drive mechanism for driving the calibration device body to roll along the base frame; and an encoder connected to the calibration device body to acquire its rotational speed and forward linear velocity. The drive mechanism drives the calibration device body to roll along the base frame, the encoder reads the rotational speed and forward linear velocity of the calibration device body, and the standard tread depth value corresponding to the standard groove on the calibration device body can be compared with the measured tread depth value of the automatic tire tread depth measuring instrument to calculate the indication error, thereby calibrating the automatic tire tread depth measuring instrument.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of tire measuring device, and particularly relates to a tire pattern depth automatic measuring instrument calibration device. BACKGROUND

[0002] The motor vehicle tire pattern depth automatic measuring instrument (hereinafter referred to as measuring instrument) is a new emerging measuring instrument for automatically detecting the motor vehicle tire pattern depth by using the principles of laser ranging and image recognition, and is applied to motor vehicle inspection institutions, tire production enterprises, vehicle enterprises, 4S stores, automobile repair factories and other units, and can be used to detect tire wear condition and effectively guarantee the motor vehicle driving safety. With the development of motor vehicle inspection technology, the device is rapidly applied and developed, and has the advantages of high detection efficiency, less human interference, real-time data transmission and the like. The measuring instrument is divided into a handheld measuring instrument, a through measuring instrument and a stop measuring instrument according to different use modes. However, the device lacks a measurement method, and a measurement institution cannot measure it, so it is difficult to guarantee the accuracy and reliability of the measurement data of the device, and limits the application and promotion of the device. SUMMARY

[0003] The purpose of the present application is to provide a tire pattern depth automatic measuring instrument calibration device to guarantee the accuracy and reliability of the measurement data of the device.

[0004] To achieve this purpose, the present application adopts the following technical solutions:

[0005] A tire pattern depth automatic measuring instrument calibration device comprises:

[0006] a base frame arranged on the surface of a tire pattern depth automatic measuring instrument to be calibrated;

[0007] a calibration device body arranged above the tire pattern depth automatic measuring instrument, wherein a crown surface of the calibration device body is provided with at least one pattern depth standard groove;

[0008] a driving mechanism for driving the calibration device body to roll along the base frame; and

[0009] an encoder connected to the calibration device body and acquiring the rotation speed and forward linear speed of the calibration device body.

[0010] The driving mechanism drives the calibration device body to roll along the base frame, the encoder reads the rotation speed and forward linear speed of the calibration device body, the pattern depth standard value corresponding to the pattern depth standard groove of the calibration device body can be compared with the pattern depth measurement value of the tire pattern depth automatic measuring instrument, and then the indication error is calculated to realize the calibration of the tire pattern depth automatic measuring instrument.

[0011] As a preferred scheme of the tire pattern depth automatic measuring instrument calibration device, the base frame is provided with a pair of slides extending along the X-axis direction, and a rolling area is defined between the slides;

[0012] The calibration device body comprises a rotating shaft and a wheel body, the rotating shaft extends outward from the inside of the wheel body along the Y-axis direction and is rollingly arranged on the pair of slides, the wheel body is fixedly connected with the rotating shaft and is synchronously rollingly arranged in the rolling area, and the wheel body is provided with the pattern depth standard groove along the tire crown surface thereof.

[0013] The rotating shaft extends to both sides of the wheel body and is rollingly arranged on the slides, the rotating shaft drives the wheel body to synchronously roll in the rolling area, and the two slides can keep the left and right balance of the wheel body, the surface of the wheel body is provided with the pattern depth standard groove, and the pattern depth standard value can be provided for subsequent calibration.

[0014] As a preferred scheme of the tire pattern depth automatic measuring instrument calibration device, the base frame comprises a pair of slides;

[0015] The rotating shaft is rollingly arranged on the slide rod, and the slide rod limits the movement of the rotating shaft along the Y-axis direction.

[0016] The slide rod limits the movement of the rotating shaft along the Y-axis direction, and ensures the rolling of the rotating shaft along the X-axis direction.

[0017] As a preferred scheme of the tire pattern depth automatic measuring instrument calibration device, at least one end of the slide rod is provided with a first stop block, and the other end of the slide rod is provided with a second stop block, and the rotating shaft is rollingly arranged between the first stop block and the second stop block.

[0018] The two ends of the slide rod are respectively provided with the first stop block and the second stop block, so as to limit the stroke of the rotating shaft.

[0019] As a preferred scheme of the tire pattern depth automatic measuring instrument calibration device, the two ends of the rotating shaft are respectively provided with annular grooves, and the slide rod is limited in position with the annular grooves.

[0020] The rotating shaft is provided with the annular groove, and the slide rod is limited in position with the annular groove, so that the rotating shaft is limited in position by the slide rod when rolling.

[0021] As a preferred scheme of the tire pattern depth automatic measuring instrument calibration device, the slide rod is provided as a cylindrical body.

[0022] The slide rod is a cylindrical body and has a curved surface, and the rolling effect of the rotating shaft on the slide rod is better.

[0023] As a preferred scheme of the tire pattern depth automatic measuring instrument calibration device, the driving mechanism comprises:

[0024] Push rod

[0025] The sleeve ring is connected to the end of the push rod, and the sleeve ring is rotatably sleeved on the rotating shaft.

[0026] The push rod and the sleeve ring are connected, the sleeve ring is sleeved on the rotating shaft, and the push rod drives the rotating shaft to roll on the slide rod.

[0027] As a preferred scheme of the tire pattern depth automatic measuring instrument calibration device, the sleeve ring is provided with two, and the two sleeve rings are arranged on the two sides of the wheel body, respectively.

[0028] The push rod is in a U shape, and the two ends of the push rod are connected with the two sleeve rings in a one-to-one correspondence.

[0029] The push rod is in a U shape, and the two ends of the push rod are connected with the two sleeve rings, so that the push rod simultaneously applies force to the two sides of the rotating shaft, and the rotating shaft rolls more stably.

[0030] As a preferred scheme of the tire pattern depth automatic measuring instrument calibration device, a display instrument is connected to the push rod, the display instrument is in communication connection with the encoder and is used for displaying the rotating speed and the forward linear speed of the calibration device body in real time.

[0031] The display instrument can display the rotating speed and the forward linear speed of the calibration device body in real time, so that the state of the wheel body rolling can be accurately controlled, and the operability and repeatability of the calibration process are ensured.

[0032] As a preferred scheme of the tire pattern depth automatic measuring instrument calibration device, the crown surface of the wheel body is provided with interference patterns in the area outside the pattern depth standard groove.

[0033] The interference patterns are used for detecting the anti-interference ability of the measuring instrument in pattern depth detection.

[0034] The lifting support adjusts the bottom of the base frame, and improves the test adaptability.

[0035] The beneficial effects of the present application are as follows: the driving mechanism drives the calibration device body to roll along the base frame, the encoder reads the rotating speed and the forward linear speed of the calibration device body, the pattern depth standard value corresponding to the pattern depth standard groove of the calibration device body can be compared with the pattern depth measurement value of the tire pattern depth automatic measuring instrument, and then the indication error is calculated, so that the calibration of the tire pattern depth automatic measuring instrument is realized. BRIEF DESCRIPTION OF DRAWINGS

[0036] Figure 1 is a structure schematic diagram of a first perspective of a tire pattern depth automatic measuring instrument calibration device provided by the embodiment of the present application;

[0037] Figure 2This is a second-view structural schematic diagram of the tire tread depth automatic measuring instrument calibration device provided in the embodiments of this application;

[0038] Figure 3 yes Figure 1 The diagram shows the structure of the rotating shaft in the calibration device of the automatic tire tread depth measuring instrument.

[0039] Figure 4 yes Figure 1 A magnified view of circle A in the middle.

[0040] In the picture:

[0041] 1-Base frame; 11-Slide rod; 100-Mounting hole; 101-Mounting groove; 111-First stop block; 112-Second stop block;

[0042] 2-Calibration device body; 20-Pattern depth standard groove; 21-Rotating shaft; 22-Wheel body; 210-Annular groove;

[0043] 3-Encoder;

[0044] 4-Pusher;

[0045] 5-Loop;

[0046] 6-Display instruments;

[0047] 7-Lifting support;

[0048] 200-Automatic tire tread depth measuring instrument. Detailed Implementation

[0049] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and not intended to limit it. Furthermore, it should be noted that, for ease of description, the accompanying drawings show only the parts relevant to the present invention, and not all of the structures.

[0050] In the description of this invention, unless otherwise explicitly specified and limited, the terms "connected," "linked," and "fixed" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0051] In the present application, unless otherwise explicitly specified and limited, the first feature is "on" or "under" the second feature can include that the first and second features are in direct contact, or that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, the first feature is "on", "above" and "over" the second feature includes that the first feature is directly above and obliquely above the second feature, or only indicates that the first feature is higher in horizontal height than the second feature. The first feature is "under", "below" and "underneath" the second feature includes that the first feature is directly below and obliquely below the second feature, or only indicates that the first feature is lower in horizontal height than the second feature.

[0052] In the description of the present embodiment, the terms "upper", "lower", "right", "left", and other orientation or position relationships are based on the orientation or position relationships shown in the drawings, and are only for the convenience of description and simplification of operation, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present application. In addition, the terms "first" and "second" are only used to distinguish in the description and have no special meaning.

[0053] The present embodiment provides a tire pattern depth automatic measuring instrument calibration device, as shown in Figure 1 and Figure 2 , the device comprises a base frame 1, a calibration device body 2, a driving mechanism and an encoder 3.

[0054] The base frame 1 is used to be fixed on the surface of the tire pattern depth automatic measuring instrument 200 to be calibrated.

[0055] The calibration device body 2 is used to be arranged above the tire pattern depth automatic measuring instrument 200, and the crown surface of the calibration device body 2 is provided with at least one pattern depth standard groove 20. In the present embodiment, the calibration device body 2 is provided with four pattern depth standard grooves 20 with different depths, and the four pattern depth standard grooves 20 correspond to four different pattern depth standard values, as shown in Figure 2 , the pattern depth standard values corresponding to the four pattern depth standard grooves 20 are 0.8mm, 1.6mm, 3.2mm and 8mm from right to left.

[0056] It should be noted that the calibration device body 2 can be provided with different pattern depth standard grooves 20, so as to change the pattern depth standard values according to the calibration needs.

[0057] The driving mechanism is used to drive the calibration device body 2 to roll along the base frame 1, and the encoder 3 is connected to the calibration device body 2 and obtains the rotation speed and forward linear speed of the calibration device body 2.

[0058] The driving mechanism drives the calibration device body 2 to roll along the base frame 1, the encoder 3 reads the rotation speed and forward linear speed of the calibration device body 2, the pattern depth standard groove 20 corresponding to the pattern depth standard value can be compared with the pattern depth measurement value of the tire pattern depth automatic measuring instrument, the indication error is calculated, and then the calibration of the tire pattern depth automatic measuring instrument can be realized.

[0059] The base frame 1 is provided with a pair of slides extending along the X-axis direction, and a rolling area is defined between the slides.

[0060] The calibration device body 2 comprises a rotating shaft 21 and a wheel body 22, the rotating shaft 21 extends outward from the inner side of the wheel body 22 along the Y-axis direction and is rollingly arranged on the pair of slides, the wheel body 22 is fixedly connected with the rotating shaft 21 and is synchronously rolling arranged in the rolling area, and the wheel body 22 is provided with a pattern depth standard groove 20 along the tire crown surface thereof.

[0061] In the embodiment, the wheel body 22 is made of hard plastic, cast iron, stainless steel or the like and is subjected to blackening treatment.

[0062] For the convenience of understanding, in the embodiment, the X-axis direction is defined as the front-rear direction, the Y-axis direction is defined as the left-right direction, and the Z-axis direction is defined as the height direction.

[0063] The rotating shaft 21 is connected with the wheel body 22 through a support spoke, the rotating shaft 21 penetrates the center of the wheel body 22 perpendicularly, both ends of the rotating shaft 21 are located on the left and right slides respectively, and the rotating shaft 21 rotates to synchronously rotate the wheel body 22.

[0064] Further, the base frame 1 comprises a pair of slide rods 11, and the rotating shaft 21 is rollingly arranged on the slide rods 11, the slide rods 11 limit the movement of the rotating shaft 21 along the left-right direction and only allow the movement of the rotating shaft 21 along the front-rear direction.

[0065] It should be noted that in the embodiment, the number of the slide rods 11 is two, and the number can also be one, three, four or other numbers, which is not limited in the embodiment.

[0066] Further, one end of at least one of the slide rods 11 is provided with a first stop block 111, and the other end of at least one of the slide rods 11 is provided with a second stop block 112, and the rotating shaft 21 is rollingly arranged between the first stop block 111 and the second stop block 112.

[0067] In the embodiment, the first stop block 111 and the second stop block 112 are arranged at the front and rear ends of the two slide rods 11, the first stop blocks 111 on the two slide rods 11 are arranged flush along the Y-axis direction, and the second stop blocks 111 on the two slide rods 11 are arranged flush along the Y-axis direction.

[0068] When the rotating shaft 21 rolls along the slide rod 11, it is blocked by the first stop block 111 and the second stop block 112, that is, the stroke of the rotating shaft 21 is limited between the first stop block 111 and the second stop block 112.

[0069] It should be noted that the first stop block 111, the second stop block 112 and the slide rod 11 are integrally formed on the base frame 1 in this embodiment.

[0070] As shown in the drawings, Figure 3 The two ends of the rotating shaft 21 are respectively provided with annular grooves 210, and the slide rod 11 is limited in position with the annular grooves 210, so that the slide rod 11 limits the movement of the rotating shaft 21 in the left-right direction and can only move in the length direction of the slide rod 11.

[0071] In this embodiment, the slide rod 11 is provided as a cylinder. In this embodiment, the diameter of the slide rod 11 is smaller than the Y-axis width 0.3mm of the annular groove 210 of the rotating shaft 21.

[0072] Further, the driving mechanism includes a push rod 4 and a sleeve ring 5, the sleeve ring 5 is connected to the end of the push rod 4, and the sleeve ring 5 is rotatably sleeved on the rotating shaft 21. The handheld push rod 4 drives the sleeve ring 5 to move synchronously, and the sleeve ring 5 and the rotating shaft 21 can relatively rotate, so that the rotating shaft 21 rolls.

[0073] In this embodiment, two sleeve rings 5 are provided, and the two sleeve rings 5 are arranged one by one on both sides of the wheel body 22; the push rod 4 is in a U-shaped structure, and the wheel body 22 is located in the U-shaped structure, and the two ends of the push rod 4 are connected to the two sleeve rings 5 one by one.

[0074] The push rod 4 is connected with a display instrument 6, and the display instrument 6 is in communication connection with the encoder 3 and is used for real-time display of the rotating speed and the forward linear velocity of the calibration device body 2. In this embodiment, the communication protocol of the display instrument 6 and the encoder 3 is Bluetooth 5.1 (Bluetooth 5.1) communication.

[0075] Further, the tire pattern depth automatic measuring instrument calibration device provided in this embodiment further includes a lifting support 7, and the lifting support 7 is arranged at the bottom of the base frame 1 and is used for adjusting the height of the base frame 1.

[0076] In this embodiment, the base frame 1 is provided with four lifting supports 7, and the four lifting supports 7 are uniformly distributed at the four vertex positions of the same rectangle.

[0077] As shown in the drawings, Figure 4 The base frame 1 is provided with a mounting hole 100 below the slide rod 11, and each end of the hole bottom of the mounting hole 100 is provided with an installation groove 101, and a nut is fixed in the installation groove 101. The top of the lifting support 7 is provided with an external thread in screw connection with the nut, and the lifting support 7 can pass through the base frame 1 in the Z-axis direction and be connected to the nut in the installation groove 101, so as to adjust the height of the lifting support 7 supporting the base frame 1.

[0078] The calibration method of the calibration device for the tire pattern depth automatic measuring instrument provided in the embodiment is as follows by using the tire pattern depth automatic measuring instrument 200 (hereinafter referred to as measuring instrument 200) of the passing type.

[0079] The measuring instrument 200 is powered on and preheated. After preheating, the wheel body 22 of the calibration device provided in the embodiment is rolled through the measuring instrument 200 at a speed of 8 km / h along the slide rod 11 by means of the rotating shaft 21, during which the wheel body 22 does not contact the measuring instrument 200, and the indication value of the measuring instrument 200 is recorded after passing through the measuring instrument 200. Repeat the measurement at least three times, and calculate the indication error according to the following formula:

[0080]

[0081] In formula (1), Δx i represents the pattern depth indication error, mm;

[0082] represents the measurement average, mm;

[0083] x0 represents the standard value of the pattern depth, mm.

[0084] If the indication error is within ±0.10 mm, the measurement accuracy of the device meets the standard requirements.

[0085] The calibration method of the calibration device for the tire pattern depth automatic measuring instrument provided in the embodiment is as follows by using the tire pattern depth automatic measuring instrument 200 (hereinafter referred to as measuring instrument 200) of the stopping type.

[0086] The measuring instrument 200 is powered on and preheated. After preheating, the wheel body 22 of the calibration device provided in the embodiment is erected on the slide rod 11 and located directly above the measuring instrument 200, and the two do not contact each other. The wheel body 22 is driven to rotate around the rotating shaft 21 at a speed of 150 r / min, and the indication value of the measuring instrument 200 is recorded. Repeat the measurement at least three times, and calculate the indication error according to the following formula:

[0087]

[0088] In formula (2), Δx i represents the pattern depth indication error, mm;

[0089] represents the measurement average, mm;

[0090] x0 represents the standard value of the pattern depth, mm.

[0091] If the indication error is within ±0.10 mm, the measurement accuracy of the device meets the standard requirements.

[0092] Obviously, the above-mentioned embodiments of the present application are only examples for clearly illustrating the present application, and are not intended to limit the implementation of the present application. Various obvious changes, re-adjustments and substitutions can be made by those skilled in the art without departing from the scope of the present application. It is unnecessary and impossible to enumerate all the embodiments here. Any modification, equivalent substitution and improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the claims of the present application.

Claims

1. A device for calibrating a tire pattern depth automatic measuring instrument, characterized in that, The utility model relates to a kind of tire pattern depth automatic measuring device calibration device, including: Base frame (1) for being arranged in the surface of tire pattern depth automatic measuring device (200) to be calibrated; Calibration device body (2) for being arranged above the tire pattern depth automatic measuring device (200), the crown surface of the calibration device body (2) is equipped with at least one pattern depth standard groove (20); Driving mechanism for driving the calibration device body (2) rolls along the base frame (1); And Encoder (3) is connected calibration device body (2) and obtains the rotating speed and forward linear velocity of calibration device body (2); The base frame (1) is equipped with a pair of slide along X-axis direction, and the rolling area is defined between the slide; The calibration device body (2) includes rotating shaft (21) and wheel body (22), the rotating shaft (21) extends outward from the inside of the wheel body (22) along Y-axis direction and rolls on a pair of the slide, the wheel body (22) is fixedly connected with the rotating shaft (21) and can be synchronously rolled in the rolling area, and the wheel body (22) is equipped with the pattern depth standard groove (20) along its crown surface; The crown surface of the wheel body (22) is provided with interference pattern in the area outside the pattern depth standard groove (20); The pattern depth standard groove (20) corresponding pattern depth standard value can be compared with the pattern depth measurement value of the tire pattern depth automatic measuring device, the indication error is calculated, and the calibration of the tire pattern depth automatic measuring device is realized.

2. The apparatus according to claim 1, wherein The base frame (1) includes a pair of slide rods (11); The rotating shaft (21) is rollably arranged on the slide rod (11), and the slide rod (11) limits the movement of the rotating shaft (21) along the Y-axis direction.

3. The apparatus of claim 2, wherein, One end of at least one of the slide rods (11) is provided with a first stop block (111), and the other end of at least one of the slide rods (11) is provided with a second stop block (112), and the rotating shaft (21) is rollably arranged between the first stop block (111) and the second stop block (112).

4. The apparatus of claim 2, wherein, Both ends of the rotating shaft (21) are respectively provided with annular grooves (210), and the slide rod (11) is limitedly matched with the annular grooves (210).

5. The apparatus of claim 4, wherein, The slide rod (11) is provided as a cylinder.

6. The tire tread depth automatic measuring instrument calibration device of claim 1, wherein, The driving mechanism includes: Push rod (4); Sleeve ring (5) connected at the end of the push rod (4), the sleeve ring (5) is rotatably sleeved on the rotating shaft (21).

7. The apparatus of claim 6, wherein the calibration device is a tire depth gauge. The sleeve ring (5) is provided with two, and two sleeve rings (5) are arranged on both sides of the wheel body (22); The push rod (4) is in the shape of U, and both ends of the push rod (4) are one-to-one connected with two sleeve rings (5).

8. The tire tread depth automatic measuring instrument calibration device according to claim 6, wherein, The push rod (4) is connected with display instrument (6), and the display instrument (6) is communicatively connected with the encoder (3) and is used for displaying the rotating speed and forward linear velocity of the calibration device body (2) in real time.

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