Tire belt angle measuring device and method

Abstract

The present invention proposes a tire belt angle measuring device and a measuring method, which belong to the field of tire testing technology. The tire belt angle measuring device does not need to be peeled off during measurement, and the measuring operation is simple, and the measuring efficiency and accuracy are high. The tire belt angle measuring device includes a frame box for placing tire slices, and the frame box is equipped with a first conductive rod and a second conductive rod respectively used to contact the ends of the belt steel wire in the cross-sections on both sides of the tire slice, and the first conductive rod and the second conductive rod are respectively located on both sides of the cross-section of the tire slice; a power supply is electrically connected between the first conductive rod and the second conductive rod to form a circuit, and an indicator for indicating the on and off of the circuit is electrically connected in the circuit; the frame box is equipped with a transverse scale and a longitudinal scale perpendicular to each other in a horizontal plane to read the plane position of the contact point between the first conductive rod and the second conductive rod and the belt steel wire; the transverse scale extends along the tire axial direction.

Description

Technical Field

[0001] The invention belongs to the technical field of tire testing, and in particular relates to a tire belt angle measuring device and a measuring method. Background Art

[0002] To ensure the safety and stability of vehicle driving, tire companies need to test the dimensions of various components of tire samples when designing products to ensure that the performance of the tire samples matches the designed performance. During mass production, in order to ensure the consistency of tire product performance and product quality, tire companies must conduct sampling and analysis on each batch of tires produced. The cross-section analysis is an analysis of the internal skeleton material and rubber size of the tire. The belt layer is an important skeleton material that bears the tire load, and its angle and material have a great impact on the safety and handling of the tire.

[0003] At present, when tire companies measure the angle of the tire belt layer, they usually dissect the tire and then use a protractor to measure it. However, this measurement method requires dissection before measuring the belt layer angle, which makes the test process time-consuming and labor-intensive, and the test efficiency is extremely low. In addition, the belt layer dissected and peeled off from the tire is not bound by the rubber and cords in the tire, and its shape will change, which deviates from the belt layer angle in the tire. Summary of the invention

[0004] In view of the technical problems that the existing tire belt layer angle test is time-consuming and labor-intensive and the test results are inaccurate, the present invention proposes a tire belt layer angle measurement device and method, which does not require the belt layer to be peeled off, has simple measurement operation, high measurement efficiency and high accuracy.

[0005] In order to achieve the above object, the technical solution adopted by the present invention is:

[0006] The present invention provides a tire belt angle measuring device, comprising a frame box for placing tire slices, the frame box being equipped with a first conductive rod and a second conductive rod respectively used to contact the ends of belt steel wires in the sections on both sides of the tire slices, the first conductive rod and the second conductive rod being respectively located on both sides of the section of the tire slices; a power source is electrically connected between the first conductive rod and the second conductive rod to form a circuit, an indicator for indicating whether the circuit is on or off is electrically connected in the circuit; the frame box being equipped with a transverse scale and a longitudinal scale perpendicular to each other in a horizontal plane to read the planar positions of the contact points between the first conductive rod and the second conductive rod and the belt steel wires; the transverse scale extends along the axial direction of the tire.

[0007] Preferably, there are two transverse rulers and two longitudinal rulers, each transverse ruler and one longitudinal ruler form a group of rulers, and the two groups of rulers are distributed on both sides of the cross-section of the tire slice; in each group of rulers, the longitudinal ruler is arranged on the side of the transverse ruler close to the tire slice.

[0008] Preferably, in each set of the scales, the longitudinal scale is slidably connected to the transverse scale and can move along the extension direction of the transverse scale.

[0009] Preferably, among the two groups of scales, the group of scales located on the same side as the first conductive rod is the first group of scales, and the other group of scales located on the same side as the second conductive rod is the second group of scales; the first conductive rod is connected to the longitudinal scale in the first group of scales through a vertically arranged first connecting rod, and the first conductive rod is arranged in the same direction as the longitudinal scale; the second conductive rod is connected to the longitudinal scale in the second group of scales through a vertically arranged second connecting rod, and the second conductive rod is arranged in the same direction as the longitudinal scale.

[0010] Preferably, the first conductive rod is slidably connected to the first connecting rod and can be lifted and lowered along the first connecting rod; the second conductive rod is slidably connected to the second connecting rod and can be lifted and lowered along the second connecting rod.

[0011] Preferably, the first conductive rod and the first connecting rod, as well as the second conductive rod and the second connecting rod are connected via a connecting block, the connecting block is provided with a first through hole and a second through hole perpendicular to each other, the hole wall of the first through hole is penetrated by a first limit top piece, the hole wall of the second through hole is penetrated by a second limit top piece, and the first limit top piece and the second limit top piece are both threadedly connected to the connecting block.

[0012] Preferably, a support plate is provided on the top surface of the frame box, and the transverse ruler and the longitudinal ruler are arranged on the support plate. The support plate, the transverse ruler and the longitudinal ruler are all made of transparent material.

[0013] Preferably, the indicator is a light bulb, an ammeter or a voltmeter.

[0014] The present invention also provides a tire belt angle measurement method using the tire belt angle measurement device described in any one of the above technical solutions, comprising the following steps:

[0015] Placing the tire slices in a frame box so that the cross section of the tire slices is perpendicular to the extension direction of the longitudinal scale;

[0016] The first conductive rod is used to contact the end of a belt steel wire in the section on one side of the tire slice, and the second conductive rod is used to contact the ends of multiple belt steel wires in the section on the other side of the tire slice one by one;

[0017] When the indicator indicates that the circuit is open, use the transverse scale and the longitudinal scale to read the plane positions of the contact points between the first conductive rod and the second conductive rod and the belt wire respectively. Use the Pythagorean theorem to calculate the angle between the line connecting the two contact points and the extension direction of the longitudinal scale, which is the tire belt angle.

[0018] Compared with the prior art, the advantages and beneficial effects of the present invention are:

[0019] 1. The tire belt angle measuring device provided by the present invention does not need to peel off the belt in the tire slice when measuring the belt angle, and the measuring operation is simple and the measuring efficiency is high. At the same time, the angle measurement deviation caused by the belt peeling measurement can be avoided, which is conducive to improving the measurement accuracy;

[0020] 2. The tire belt angle measuring device provided by the present invention has a simple structure, low equipment cost, convenient use, high accuracy, and has broad market prospects in the field of tire testing. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 A schematic diagram of the three-dimensional structure of a tire belt angle measuring device provided by an embodiment of the present invention;

[0022] Figure 2 A schematic diagram of the structure of a connection block provided in an embodiment of the present invention;

[0023] Figure 3 A schematic diagram of a tire belt angle measurement principle provided by an embodiment of the present invention;

[0024] In the above figures: 1. tire slice; 2. belt layer steel wire; 3. frame box; 4. first conductive rod; 5. second conductive rod; 6. power supply; 7. indicator; 8. transverse scale; 9. longitudinal scale; 10. first connecting rod; 11. second connecting rod; 12. connecting block; 121. first through hole; 122. second through hole; 123. first limit top piece; 124. second limit top piece. DETAILED DESCRIPTION

[0025] The present invention is described in detail below by way of exemplary embodiments. However, it should be understood that elements, structures, and features in one embodiment may also be beneficially combined in other embodiments without further description.

[0026] In the description of the present invention, it should be noted that: Figure 2 The horizontal direction in is the tire axis, that is, Figure 2 The horizontal direction is the horizontal direction, and the vertical direction is the longitudinal direction; the terms "upper", "lower" and the like indicate directions or positional relationships based on the attached Figure 1The positional relationship shown is only for the convenience of describing the present invention and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance.

[0027] like Figure 1 As shown, the embodiment of the present invention relates to a tire belt angle measuring device, comprising a frame box 3 for placing a tire slice 1, the frame box 3 is equipped with a first conductive rod 4 and a second conductive rod 5 for contacting the ends of the belt steel wire 2 in the cross section of the tire slice 1 on both sides, respectively, and the first conductive rod 4 and the second conductive rod 5 are respectively located on both sides of the cross section of the tire slice 1; a power supply 6 is electrically connected between the first conductive rod 4 and the second conductive rod 5 to form a circuit, and an indicator 7 for indicating the on-off of the circuit is electrically connected in the circuit; the frame box 3 is equipped with a transverse scale 8 and a longitudinal scale 9 perpendicular to each other in a horizontal plane to read the plane position of the contact point between the first conductive rod 4 and the second conductive rod 5 and the belt steel wire 2; the transverse scale 8 and the longitudinal scale 9 are located above the tire slice 1, and the transverse scale 8 extends along the tire axial direction. It should be noted that the tire slice 1 is a conventional tire sampling sample used for tire cross section analysis; the belt angle refers to the angle between the extension direction of the steel wire in the tire belt and the tire circumference.

[0028] In the above tire belt angle measuring device, the first conductive rod 4 and the second conductive rod 5 are respectively in contact with the ends of the belt steel wire 2 in the cross-sections on both sides of the tire slice 1. When the first conductive rod 4 and the second conductive rod 5 are in contact with the same steel wire, the steel wire will connect the circuit formed by the power supply 6, the indicator 7, the first conductive rod 4 and the second conductive rod 5, and the indicator 7 indicates that the circuit is a passage; then, through the transverse scale 8 and the longitudinal scale 9, the plane position of the contact point between the first conductive rod 4 and the belt steel wire 2 and the plane position of the contact point between the second conductive rod 5 and the belt steel wire 2 can be obtained at this time. The connecting direction of these two contact points is the extension direction of the belt steel wire 2. The belt angle can be calculated according to the readings of the transverse scale 8 and the longitudinal scale 9. When the belt angle is measured by the above tire belt angle measuring device, there is no need to peel the belt in the tire slice 1. The measurement operation is simple and the measurement efficiency is high. At the same time, the angle measurement deviation caused by the belt peeling measurement can be avoided, which is conducive to improving the measurement accuracy. The tire belt angle measuring device has a simple structure, low equipment cost, convenient use, high accuracy, and has broad market prospects in the field of tire testing.

[0029] In order to facilitate the acquisition of the contact point positions of the first conductive rod 4 and the belt layer steel wire 2 and the contact point positions of the second conductive rod 5 and the belt layer steel wire 2, as a preferred embodiment, Figure 1As shown, there are two transverse rulers 8 and two longitudinal rulers 9, each transverse ruler 8 and one longitudinal ruler 9 form a set of rulers, and the two sets of rulers are distributed on both sides of the cross section of the tire slice 1; in each set of rulers, the longitudinal ruler 9 is arranged on the side of the transverse ruler 8 close to the tire slice 1. Of the two sets of rulers arranged in this way, one set is close to the first conductive rod 4, and the other set is close to the second conductive rod 5, so as to facilitate the acquisition of the contact point position of the first conductive rod 4 and the belt layer steel wire 2 and the contact point position of the second conductive rod 5 and the belt layer steel wire 2.

[0030] like Figure 1 As shown, in each set of scales, the longitudinal scale 9 is slidably connected to the transverse scale 8 and can be moved along the extension direction of the transverse scale 8. When reading the transverse coordinate of the contact point, the longitudinal scale 9 is moved along the extension direction of the transverse scale 8 until the vertical projection of the contact point to be measured is located on the longitudinal scale 9. At this time, the reading on the transverse scale 8 corresponding to the connection between the transverse scale 8 and the longitudinal scale 9 is the transverse coordinate of the contact point. Connecting the transverse scale 8 and the longitudinal scale 9 in this way is conducive to obtaining the transverse coordinate reading of the contact point. It should be noted that the sliding connection method between the longitudinal scale 9 and the transverse scale 8 can adopt the conventional sliding connection method in the art, for example: by matching the slide groove and the slider, a slide groove is set on the transverse scale 8, and a slider that slides with the slide groove is set on the longitudinal scale 9.

[0031] Furthermore, in order to obtain the longitudinal coordinate reading of the contact point, as Figure 1 As shown, among the two groups of scales, the group of scales located on the same side as the first conductive rod 4 is the first group of scales, and the other group of scales located on the same side as the second conductive rod 5 is the second group of scales; the first conductive rod 4 is connected to the longitudinal scale 9 in the first group of scales through a vertically arranged first connecting rod 10, and the first conductive rod 4 and the longitudinal scale 9 are arranged in the same direction; the second conductive rod 5 is connected to the longitudinal scale 9 in the second group of scales through a vertically arranged second connecting rod 11, and the second conductive rod 5 and the longitudinal scale 9 are arranged in the same direction. The first conductive rod 4 and the second conductive rod 5 are connected in this way, so that the first conductive rod 4 is located directly below the longitudinal scale 9 of the first group of scales, and the second conductive rod 5 is located directly below the longitudinal scale 9 of the second group of scales, so that by observing the contact points in the vertical direction, the longitudinal coordinates of the contact points of the first conductive rod 4 and the second conductive rod 5 with the belt layer steel wire 2 can be accurately obtained from the two longitudinal scales 9. At the same time, the two longitudinal scales 9 move synchronously with the first conductive rod 4 and the second conductive rod 5 respectively, which is conducive to ensuring the accuracy of the horizontal coordinate reading of the contact point.

[0032] In order to be applicable to the detection of tire slices 1 of different thicknesses, such as Figure 1As shown, the first conductive rod 4 is slidably connected to the first connecting rod 10 and can be raised and lowered along the first connecting rod 10; the second conductive rod 5 is slidably connected to the second connecting rod 11 and can be raised and lowered along the second connecting rod 11. By raising and lowering the first conductive rod 4 along the first connecting rod 10 and the second conductive rod 5 along the second connecting rod 11, the heights of the first conductive rod 4 and the second conductive rod 5 can be adjusted to match the heights of the belt steel wires 2 in the tire slice 1 for easy measurement. It should be noted that, as Figure 1 and Figure 2 As shown, the first conductive rod 4 and the first connecting rod 10, as well as the second conductive rod 5 and the second connecting rod 11 are connected through a connecting block 12, the connecting block 12 is provided with a first through hole 121 and a second through hole 122 which are perpendicular to each other, the hole wall of the first through hole 121 is penetrated with a first position-limiting top piece 123, the hole wall of the second through hole 122 is penetrated with a second position-limiting top piece 124, the first position-limiting top piece 123 and the second position-limiting top piece 124 are both threadedly connected to the connecting block 12. When in use, the first connecting rod 10 is passed through the first through hole 121, and the first position-limiting top piece 123 is used to tighten the first connecting rod 10 and the connecting block 12, the first conductive rod 4 is passed through the second through hole 122, and the second position-limiting top piece 124 is used to tighten the first conductive rod 4 and the connecting block 12. By loosening the first limit top piece 123, the first conductive rod 4 can be raised and lowered along the first connecting rod 10 to be suitable for the detection of tire slices 1 of different thicknesses; by loosening the second limit top piece 124, the first conductive rod 4 can be extended and retracted in the longitudinal direction to be suitable for the detection of tire slices 1 of different widths. It can be understood that the second conductive rod 5 and the second connecting rod 11 can be installed and used in the same manner as described above using the connecting block 12. In addition, it should be noted that the sliding connection between the first conductive rod 4 and the first connecting rod 10, and the second conductive rod 5 and the second connecting rod 11 can also adopt other conventional sliding connection methods in the art, for example: connecting by a socket connection.

[0033] In order to facilitate the setting of the horizontal scale 8 and the vertical scale 9, as shown in FIG. Figure 1 As shown, a support plate is provided on the top surface of the frame box 3, and a transverse scale 8 and a longitudinal scale 9 are arranged on the support plate, and the support plate, the transverse scale 8 and the longitudinal scale 9 are all made of transparent materials. The support plate can support the transverse scale 8 and the longitudinal scale 9, and at the same time, the support plate, the transverse scale 8 and the longitudinal scale 9 are all made of transparent materials, which will not affect the observation of the contact point. It should be noted that the transparent material in this embodiment is a conventional material in the field, such as organic glass.

[0034] In addition, if Figure 1As shown, the power source 6 used in this embodiment is specifically a battery pack, and those skilled in the art may also use other types of power sources 6 as long as they can provide power. The indicator 7 used in this embodiment is specifically a light bulb, and those skilled in the art may also use an indicator 7 such as an ammeter or a voltmeter that can indicate the on / off state of a circuit.

[0035] The embodiment of the present invention further provides a tire belt angle measurement method using the tire belt angle measurement device, comprising the following steps:

[0036] S1: Place the tire slice 1 in the frame box 3, and place it so that the cross section of the tire slice 1 is perpendicular to the extension direction of the longitudinal scale 9. The placement method of this step can place the tire slice 1 so that the tire axis is parallel to the transverse scale 8, and the tangent direction of the tire circumference is parallel to the longitudinal scale 9, and a plane coordinate system is established for the subsequent reading of the plane position of the contact point between the first conductive rod 4 and the second conductive rod 5 and the belt layer steel wire 2.

[0037] S2: Use the first conductive rod 4 to contact the end of a belt steel wire 2 in one side section of the tire slice 1, and use the second conductive rod 5 to contact the ends of multiple belt steel wires 2 in the other side section of the tire slice 1 one by one. In this embodiment, specifically: move the first conductive rod 4 along the extension direction of the transverse scale 8 in the first group of scales to contact the end of a belt steel wire 2 in one side section of the tire slice 1, and move the second conductive rod 5 along the extension direction of the transverse scale 8 in the second group of scales to contact the ends of multiple belt steel wires 2 in the other side section of the tire slice 1 one by one.

[0038] S3: When the indicator 7 indicates that the circuit is open, the horizontal scale 8 and the longitudinal scale 9 are used to read the plane positions of the contact points between the first conductive rod 4 and the second conductive rod 5 and the belt layer steel wire 2, respectively, and the angle between the line connecting the two contact points and the extension direction of the longitudinal scale 9 is calculated using the Pythagorean theorem, which is the tire belt layer angle. Figure 3 As shown, when the zero points of the transverse scales 8 in the two sets of scales are aligned in the transverse direction, and the zero point of the longitudinal scale 9 in each set of scales is aligned with the edge of the transverse scale 8, in the horizontal plane, the zero point of the transverse scale 8 in the first set of scales is taken as the origin, and the extension direction of the transverse scale 8 in the first set of scales is taken as the X-axis to establish a plane coordinate system, then the calculation formula of the tire belt angle is as follows:

[0039]

[0040] In formula (1), a is the corresponding reading of the contact point between the first conductive rod 4 and the belt layer steel wire 2 on the longitudinal scale 9 in the first set of scales, b is the corresponding reading of the contact point between the second conductive rod 5 and the belt layer steel wire 2 on the longitudinal scale 9 in the second set of scales, c is the corresponding reading of the contact point between the first conductive rod 4 and the belt layer steel wire 2 on the transverse scale 8 in the first set of scales, d is the corresponding reading of the contact point between the second conductive rod 5 and the belt layer steel wire 2 on the transverse scale 8 in the second set of scales, and e is the distance between the edge of the transverse scale 8 in the first set of scales and the edge of the transverse scale 8 in the second set of scales.

Claims

1. A tire belt angle measuring device, characterized in that: The invention comprises a frame box (3) for placing a tire slice (1), wherein the frame box (3) is provided with a first conductive rod (4) and a second conductive rod (5) for contacting the ends of the belt layer steel wire (2) in the cross section on both sides of the tire slice (1), respectively, and the first conductive rod (4) and the second conductive rod (5) are respectively located on both sides of the cross section of the tire slice (1); a power source (6) is electrically connected between the first conductive rod (4) and the second conductive rod (5) to form a circuit, and an indicator (7) for indicating whether the circuit is on or off is electrically connected in the circuit; the frame box (3) is provided with a transverse scale (8) and a longitudinal scale (9) which are perpendicular to each other in a horizontal plane, so as to read the plane position of the contact point between the first conductive rod (4) and the second conductive rod (5) and the belt layer steel wire (2); the transverse scale (8) extends along the axial direction of the tire; There are two transverse rulers (8) and two longitudinal rulers (9), each of which forms a set of rulers together with one longitudinal ruler (9), and the two sets of rulers are distributed on both sides of the cross section of the tire slice (1); in each set of rulers, the longitudinal ruler (9) is arranged on a side of the transverse ruler (8) close to the tire slice (1); the longitudinal ruler (9) is slidably connected to the transverse ruler (8) and can move along the extension direction of the transverse ruler (8); in the two sets of rulers, the set of rulers located on the same side as the first conductive rod (4) is the first set of rulers, and the other set of rulers located on the same side as the second conductive rod (5) is the second set of rulers; The first conductive rod (4) is connected to a longitudinal scale (9) in the first group of scales through a first vertically arranged first connecting rod (10), and the first conductive rod (4) and the longitudinal scale (9) are arranged in the same direction; the second conductive rod (5) is connected to a longitudinal scale (9) in the second group of scales through a second vertically arranged second connecting rod (11), and the second conductive rod (5) and the longitudinal scale (9) are arranged in the same direction; the first conductive rod (4) is slidably connected to the first connecting rod (10) and can be raised and lowered along the first connecting rod (10); the second conductive rod (5) is slidably connected to the second connecting rod (11) and can be raised and lowered along the second connecting rod (11); The top surface of the frame box (3) is provided with a support plate, and the transverse scale (8) and the longitudinal scale (9) are arranged on the support plate. The support plate, the transverse scale (8) and the longitudinal scale (9) are all made of transparent material.

2. The tire belt angle measuring device according to claim 1, characterized in that: The first conductive rod (4) and the first connecting rod (10), as well as the second conductive rod (5) and the second connecting rod (11), are connected via a connecting block (12); the connecting block (12) is provided with a first through hole (121) and a second through hole (122) which are perpendicular to each other; a first position-limiting top piece (123) is passed through the hole wall of the first through hole (121); a second position-limiting top piece (124) is passed through the hole wall of the second through hole (122); the first position-limiting top piece (123) and the second position-limiting top piece (124) are both threadedly connected to the connecting block (12).

3. The tire belt angle measuring device according to claim 1, characterized in that: The indicator (7) is a light bulb, an ammeter or a voltmeter.

4. A tire belt angle measuring method using the tire belt angle measuring device according to any one of claims 1 to 3, characterized in that: The steps include: Placing the tire slice (1) in the frame box (3) so that the cross section of the tire slice (1) is perpendicular to the extension direction of the longitudinal scale (9); A first conductive rod (4) is used to contact the end of a belt layer steel wire (2) in a cross section on one side of the tire slice (1), and a second conductive rod (5) is used to contact the ends of multiple belt layer steel wires (2) in a cross section on the other side of the tire slice (1) one by one; When the indicator (7) indicates that the circuit is open, the plane positions of the contact points between the first conductive rod (4) and the second conductive rod (5) and the belt layer steel wire (2) are read using the transverse scale (8) and the longitudinal scale (9), respectively, and the angle between the line connecting the two contact points and the extension direction of the longitudinal scale (9) is calculated using the Pythagorean theorem, which is the tire belt layer angle.

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