CN115060220A - Calibrating device for automatic measuring instrument for tyre pattern depth - Google Patents

Abstract

The invention belongs to the technical field of tire measuring devices, and discloses a calibrating device of an automatic tire pattern depth measuring instrument, which comprises a base frame, a positioning device and a control device, wherein the base frame is used for being arranged on the surface of the automatic tire pattern depth measuring instrument to be calibrated; the device comprises a calibration device body, a measuring device and a control device, wherein the calibration device body is arranged above the automatic measuring instrument for the pattern depth of the tire, and the surface of a tire crown of the calibration device body is provided with at least one pattern depth standard groove; the driving mechanism is used for driving the calibration device body to roll along the base frame; and the encoder is connected with the calibrating device body and acquires the rotating speed and the advancing linear speed of the calibrating device body. The driving mechanism drives the calibrating device body to roll along the base frame, the encoder reads the rotating speed and the advancing linear speed of the calibrating device body, and the pattern depth standard value corresponding to the pattern depth standard groove of the calibrating device body can be compared with the pattern depth measured value of the automatic measuring instrument for the tire pattern depth, so that the indicating value error is calculated, and the automatic measuring instrument for the tire pattern depth is calibrated.

Description

Tire tread depth automatic measuring instrument calibration device

technical field

The invention relates to the technical field of tire measuring devices, in particular to a calibration device for an automatic measuring instrument for tire tread depth.

Background technique

The automatic measuring instrument for the tread depth of automobile tires (hereinafter referred to as the measuring instrument) is an emerging measuring instrument that automatically detects the tread depth of automobile tires using the principles of laser ranging and image recognition. 4S shops, auto repair shops and other units can be used to detect tire wear and effectively ensure the safety of motor vehicles. With the development of vehicle inspection technology, the device is rapidly applied and developed, and has the advantages of high detection efficiency, less human interference, and real-time data transmission. The measuring instruments are divided into hand-held measuring instruments, pass-through measuring instruments, and dwelling measuring instruments according to the different ways of use. However, the device lacks a measurement method, and the measurement agency cannot measure it, and it is difficult to ensure the accuracy and reliability of the measurement data of the device, which limits the application and promotion of the device.

SUMMARY OF THE INVENTION

The purpose of the present invention is to provide an automatic tire tread depth measuring instrument calibration device to ensure the accuracy and reliability of the measured data of the device.

For this purpose, the present invention adopts the following technical solutions:

A tire tread depth automatic measuring instrument calibration device, comprising:

The base frame is used to be arranged on the surface of the automatic tread depth measuring instrument to be calibrated;

a calibration device body, configured to be arranged above the tire tread depth automatic measuring instrument, the tread crown surface of the calibration device body is provided with at least one tread depth standard groove;

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

The encoder is connected to the calibration device body and obtains the rotational speed and forward linear velocity of the calibration device body.

The drive 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, and the pattern depth standard value corresponding to the pattern depth standard groove of the calibration device body can be compared with the tire tread depth automatic measuring instrument. The pattern depth measurement value is compared, and then the indication error is calculated to realize the calibration of the tire pattern depth automatic measuring instrument.

As a preferred solution of the above tire tread depth automatic measuring instrument calibration device, the base frame is provided with a pair of slideways extending along the X-axis direction, and a rolling area is defined between the slideways;

The calibration device body includes a rotation shaft and a wheel body, the rotation shaft extends outward from the inner side of the wheel body along the Y-axis direction and is rolled on a pair of the slideways, and the wheel body is fixedly connected to the rotation The shaft can be synchronously rolled in the rolling area, and the wheel body is provided with the tread depth standard groove along its crown surface.

The rotating shaft extends to both sides of the wheel body and rolls on the slideway. The rotating shaft drives the wheel body to roll synchronously in the rolling area. At the same time, the two slideways can keep the left and right balance of the wheel body. The surface of the wheel body is provided with a standard groove for pattern depth. , which can provide the standard value of pattern depth for subsequent calibration.

As a preferred solution of the above tire tread depth automatic measuring instrument calibration device, the base frame includes a pair of sliding bars;

The rotating shaft is rotatably disposed on the sliding rod, and the sliding rod restricts the rotating shaft from moving in the Y-axis direction.

The slider restricts the movement of the rotation axis in the direction of the Y-axis and ensures that it rolls in the direction of the X-axis.

As a preferred solution of the above automatic tire tread depth measuring instrument calibration device, at least one end of one of the sliding bars is provided with a first stop block, and the other end of at least one of the sliding bars is provided with a second stop block , the rotating shaft is rolled between the first stop block and the second stop block.

Both ends of the sliding rod are respectively provided with a first stop block and a second stop block to limit the stroke of the rotating shaft.

As a preferred solution of the above tire tread depth automatic measuring instrument calibration device, two ends of the rotating shaft are respectively provided with annular grooves, and the sliding rods cooperate with the annular grooves in a limited position.

The rotating shaft is provided with an annular groove, and the limited cooperation between the sliding rod and the annular groove enables the rotating shaft to be limited by the sliding rod after rolling.

As a preferred solution of the above-mentioned automatic tire tread depth measuring instrument calibration device, the sliding rod is configured as a cylinder.

The sliding bar is cylindrical and has a curved surface, and the rolling effect of the rotating shaft is better when rolling on the sliding bar.

As a preferred solution of the above-mentioned tire tread depth automatic measuring instrument calibration device, the driving mechanism includes:

putter;

The collar is connected to the end of the push rod, and the collar is rotatably sleeved on the rotating shaft.

The push rod is connected with the sleeve ring, the sleeve ring is sleeved on the rotating shaft, and the push rod is pushed to drive the rotating shaft to roll on the sliding rod.

As a preferred solution of the above-mentioned tire tread depth automatic measuring instrument calibration device, there are two said collars, and the two said collars are respectively arranged on both sides of the wheel body;

The push rod is U-shaped, and two ends of the push rod are connected to the two collars in a one-to-one correspondence.

The push rod is U-shaped, and both ends are connected with collars, so that the push rod exerts force on both sides of the rotating shaft at the same time, so that the rotating shaft rolls more smoothly.

As a preferred solution of the above tire tread depth automatic measuring instrument calibration device, a display instrument is connected to the push rod, and the display instrument is connected in communication with the encoder and used to display the rotation speed and forward linear speed of the calibration device body in real time. .

The display instrument can display the rotation speed and forward linear speed of the calibration device body in real time, which is convenient for precise control of the rolling state of the wheel body and ensures the operability and repeatability of the calibration process.

As a preferred solution of the above-mentioned calibrating device for automatic tread depth measuring instrument, an interference pattern is provided on the surface of the crown of the wheel body in the area outside the tread depth standard groove.

The interference pattern is used to detect the anti-interference ability of the pattern depth detection of the measuring instrument.

The lifting bracket adjusts the bottom of the base frame to improve the test adaptability.

The beneficial effects of the present invention are as follows: the driving mechanism drives the calibration device body to roll along the base frame, the encoder reads the rotation speed and forward linear velocity of the calibration device body, and the pattern depth standard value corresponding to the pattern depth standard groove of the calibration device body can match the tire The pattern depth measurement value of the pattern depth automatic measuring instrument is compared, and the indication error is calculated to realize the calibration of the tire pattern depth automatic measuring instrument.

Description of drawings

1 is a schematic structural diagram of a first view angle of a tire tread depth automatic measuring instrument calibration device provided by an embodiment of the present application;

2 is a schematic structural diagram of a second viewing angle of a tire tread depth automatic measuring instrument calibration device provided by an embodiment of the present application;

Fig. 3 is the structural representation of the rotating shaft in the tire tread depth automatic measuring instrument calibration device shown in Fig. 1;

FIG. 4 is an enlarged view of circle A in FIG. 1 .

In the picture:

1-base frame; 11-slide rod; 100-installation hole; 101-installation slot; 111-first stop block; 112-second stop block;

2- calibration device body; 20- pattern depth standard groove; 21- rotating shaft; 22- wheel body; 210- annular groove;

3-encoder;

4 - putter;

5 - collar;

6-Display instrument;

7- Lifting bracket;

200 - Automatic measuring instrument for tire tread depth.

Detailed ways

The present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention, but not to limit the present invention. In addition, it should be noted that, for the convenience of description, the drawings only show some but not all structures related to the present invention.

In the description of the present invention, unless otherwise expressly specified and limited, the terms "connected", "connected" and "fixed" should be understood in a broad sense, for example, it may be a fixed connection, a detachable connection, or an integrated ; It can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, and it can be the internal connection of two elements or the interaction relationship between the two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood in specific situations.

In the present invention, unless otherwise expressly specified and limited, a first feature "on" or "under" a second feature may include the first and second features in direct contact, or may include the first and second features Not directly but through additional features between them. Also, the first feature being "above", "over" and "above" the second feature includes the first feature being directly above and obliquely above the second feature, or simply means that the first feature is level higher than the second feature. The first feature is "below", "below" and "below" the second feature includes the first feature being directly below and diagonally below the second feature, or simply means that the first feature has a lower level than the second feature.

In the description of this embodiment, the terms "upper", "lower", "right", etc. are based on the orientation or positional relationship shown in the accompanying drawings, which are only for convenience of description and simplified operation, rather than indicating Or imply that the device or element referred to must have a particular orientation, be constructed and operate in a particular orientation, and therefore should not be construed as limiting the invention. In addition, the terms "first" and "second" are only used for distinction in description, and have no special meaning.

This embodiment provides a calibration device for an automatic tire tread depth measuring instrument. As shown in FIG. 1 and FIG. 2 , the device includes a base frame 1 , a calibration device body 2 , a driving mechanism and an encoder 3 .

The base frame 1 is used to be fixed on the surface of the automatic tread depth measuring instrument 200 to be calibrated.

The calibration device body 2 is arranged above the automatic tire tread depth measuring instrument 200 . The crown surface of the calibration device body 2 is provided with at least one pattern depth standard groove 20 . In this embodiment, the calibration device body 2 is provided with four grooves with different depths. The pattern depth standard groove 20, 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, 8mm.

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 value according to calibration needs.

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 to obtain the rotational speed and forward linear velocity of the calibration device body 2 .

The drive mechanism drives the calibration device body 2 to roll along the base frame 1, the encoder 3 reads the rotation speed and forward linear velocity of the calibration device body 2, and the pattern depth standard value corresponding to the pattern depth standard groove 20 can be compared with that of the tire pattern depth automatic measuring instrument. Comparing the measured values of the pattern depth, calculating the indication error, and then realizing the calibration of the automatic measuring instrument for the tire pattern depth.

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

The calibration device body 2 includes 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 rolls on a pair of slideways. The wheel body 22 is fixedly connected to the rotating shaft 21 and can be rolled synchronously. Provided in the rolling area, the wheel body 22 is provided with a tread depth standard groove 20 along its crown surface.

In this embodiment, the wheel body 22 is made of hard plastic, cast iron, stainless steel and other materials, and is treated with blackening.

For ease of understanding, in this 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.

The rotating shaft 21 and the wheel body 22 are connected by supporting spokes. The rotating shaft 21 vertically penetrates the center of the wheel body 22. The two ends of the rotating shaft 21 are respectively located on the left and right slideways. The rotation of the rotating shaft 21 makes the wheel body 22 rotate synchronously. .

Further, the base frame 1 includes a pair of sliding rods 11 , and the rotating shaft 21 is rotatably disposed on the sliding rods 11 .

It should be noted that, in this embodiment, the number of the sliding bars 11 is two, and may also be other numbers such as one, three, four, etc., which is not limited in this embodiment.

Further, at least one end of one of the sliding rods 11 is provided with a first stop block 111 , the other end of at least one of the sliding rods 11 is provided with a second stop block 112 , and the rotating shaft 21 is rolled on the first stop block 111 and the second stopper 112 .

In this embodiment, the front and rear ends of the two sliding rods 11 are provided with a first stopper block 111 and a second stopper block 112 , and the first stopper blocks 111 on the two sliding rods 11 are arranged flush along the Y-axis direction , the second stop blocks 111 on the two sliding rods 11 are arranged flush along the Y-axis direction.

When the rotating shaft 21 rolls along the sliding rod 11 , it will be 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 .

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

As shown in FIG. 3 , the two ends of the rotating shaft 21 are respectively provided with annular grooves 210 , and the sliding rod 11 cooperates with the annular groove 210 to limit the position, so that the sliding rod 11 restricts the movement of the rotating shaft 21 in the left and right directions, and can only move along the length direction of the sliding rod 11 . sports.

In this embodiment, the sliding rod 11 is configured as a cylinder. In this embodiment, the diameter of the sliding rod 11 is smaller than the Y-axis width of the annular groove 210 of the rotating shaft 21 by 0.3 mm.

Further, the driving mechanism includes a push rod 4 and a collar 5 , the collar 5 is connected to the end of the push rod 4 , and the collar 5 is rotatably sleeved on the rotating shaft 21 . The hand-held push rod 4 drives the collar 5 to move synchronously, and the collar 5 and the rotating shaft 21 can rotate relative to each other, so that the rotating shaft 21 rolls.

In this embodiment, two collars 5 are provided, and the two collars 5 are arranged on both sides of the wheel body 22 in one-to-one correspondence; the push rod 4 is U-shaped, the wheel body 22 is located in the U-shaped structure, and the push rod The two ends of the 4 are connected to the two collars 5 in a one-to-one correspondence.

A display meter 6 is connected to the push rod 4, and the display meter 6 is connected to the encoder 3 in communication and used to display the rotational speed and the forward linear speed of the calibration device body 2 in real time. In this embodiment, the communication protocol between the display meter 6 and the encoder 3 is Bluetooth 5.1 (Bluetooth 5.1) communication.

Further, the apparatus for calibrating an automatic tire tread depth measuring instrument provided in this embodiment further includes a lifting bracket 7 . The lifting bracket 7 is arranged at the bottom of the base frame 1 and is used to adjust the height of the base frame 1 .

In this embodiment, the base frame 1 is provided with four lifting brackets 7 , and the four lifting brackets 7 are evenly distributed at the four vertex positions of the same rectangle.

As shown in FIG. 4 , a mounting hole 100 is provided on the base frame 1 corresponding to the lower part of the sliding rod 11 , and two ends of the bottom of the mounting hole 100 are respectively provided with a mounting slot 101 , and a nut is fixed in the mounting slot 101 . The top of the lifting bracket 7 is provided with an external thread connected with the nut. The lifting bracket 7 can pass through the base frame 1 along the Z-axis direction and be connected to the nut of the installation slot 101 to adjust the height of the lifting bracket 7 supporting the base frame 1 .

The calibration method of the automatic tire tread depth measuring instrument calibration device provided by the present embodiment is as follows:

The meter 200 is powered on and warmed up. After preheating, the wheel body 22 of the calibration device provided in this embodiment is rolled through the measuring instrument 200 at a speed of 8 km/h along the sliding rod 11 by means of the rotating shaft 21. After 200, record the indication value of the measuring instrument 200. Repeat the measurement at least three times, and calculate the indication error according to the following formula:

In formula (1): Δx _i represents the indication error of the pattern depth, mm;

表示测量平均值，mm；

Indicates the average value of measurement, mm;

x ₀ represents the standard value of pattern depth, mm.

If the indication error is within the range of ±0.10mm, the measurement accuracy of the equipment meets the standard requirements.

The calibration method of the automatic tire tread depth measuring instrument calibrating device provided by the present embodiment is as follows:

The meter 200 is powered on and warmed up. After preheating, the wheel body 22 of the calibration device provided in this embodiment is erected on the slide bar 11 and located directly above the measuring instrument 200, and the two do not contact each other, and the wheel body 22 is driven around the rotating shaft 21 at a speed of 150r/min. Rotate and record the indication of the meter 200. Repeat the measurement at least three times, and calculate the indication error according to the following formula:

In formula (2): Δx _i represents the indication error of the pattern depth, mm;

表示测量平均值，mm；

Indicates the average value of measurement, mm;

x ₀ represents the standard value of pattern depth, mm.

If the indication error is within the range of ±0.10mm, the measurement accuracy of the equipment meets the standard requirements.

Obviously, the above-mentioned embodiments of the present invention are only examples for clearly illustrating the present invention, rather than limiting the embodiments of the present invention. For those of ordinary skill in the art, various obvious changes, readjustments and substitutions can be made without departing from the protection scope of the present invention. There is no need and cannot be exhaustive of all implementations here. Any modifications, equivalent replacements and improvements made within the spirit and principle of the present invention shall be included within the protection scope of the claims of the present invention.

Claims (10)

1. a tire tread depth automatic measuring instrument calibration device, is characterized in that, comprises: a base frame (1) for being arranged on the surface of the automatic tread depth measuring instrument (200) to be calibrated; a calibration device body (2) for being arranged above the tire tread depth automatic measuring instrument (200), and at least one tread depth standard groove (20) is provided on the tread crown surface of the calibration device body (2); a driving mechanism for driving the calibration device body (2) to roll along the base frame (1); and An encoder (3) is connected to the calibration device body (2) and obtains the rotational speed and forward linear velocity of the calibration device body (2). 2 . The automatic tire tread depth measuring instrument calibration device according to claim 1 , wherein the base frame ( 1 ) is provided with a pair of slideways extending along the X-axis direction, and between the slideways is defined as rolling area; The calibration device body (2) includes a rotating shaft (21) and a wheel body (22), and the rotating shaft (21) extends outward from the inner side of the wheel body (22) along the Y-axis direction and is rolled and arranged on a On the slideway, the wheel body (22) is fixedly connected to the rotating shaft (21) and can be synchronously rolled in the rolling area, and the wheel body (22) is provided with the pattern along its crown surface Depth standard slot (20). 3. The tire tread depth automatic measuring instrument calibration device according to claim 2, wherein the base frame (1) comprises a pair of sliding bars (11); The rotating shaft (21) is rotatably arranged on the sliding rod (11), and the sliding rod (11) restricts the rotating shaft (21) from moving in the Y-axis direction. 4 . The automatic tire tread depth measuring instrument calibration device according to claim 3 , wherein at least one end of one of the sliding rods ( 11 ) is provided with a first stop block ( 111 ), and at least one of the sliding bars ( 11 ) is provided at one end. The other end of the sliding rod (11) is provided with a second stopper (112), and the rotating shaft (21) is rollingly arranged on the first stopper (111) and the second stopper (112). 112) between. 5. The tire tread depth automatic measuring instrument calibration device according to claim 3, wherein the two ends of the rotating shaft (21) are respectively provided with annular grooves (210), and the sliding rod (11) is connected to the The annular groove (210) is limited and matched. 6 . The automatic tire tread depth measuring instrument calibration device according to claim 5 , wherein the sliding rod ( 11 ) is configured as a cylinder. 7 . 7. The tire tread depth automatic measuring instrument calibration device according to claim 2, wherein the driving mechanism comprises: putter (4); A collar (5) is connected to the end of the push rod (4), and the collar (5) is rotatably sleeved on the rotating shaft (21). 8 . The automatic tire tread depth measuring instrument calibration device according to claim 7 , wherein there are two said collars ( 5 ), and the two said collars ( 5 ) are respectively arranged on the wheel body. 9 . (22) both sides; The push rod (4) is U-shaped, and two ends of the push rod (4) are connected to the two collars (5) in a one-to-one correspondence. 9. The tire tread depth automatic measuring instrument calibration device according to claim 7, wherein a display instrument (6) is connected to the push rod (4), and the display instrument (6) is connected to the encoder ( 3) It is connected by communication and used to display the rotation speed and forward linear speed of the calibration device body (2) in real time. 10. The automatic tire tread depth measuring instrument calibration device according to any one of claims 2-9, characterized in that, the crown surface of the wheel body (22) is outside the tread depth standard groove (20) The locale settings interfere with the pattern.

Images