Tire positioning detection mechanism and tire positioning detection method

Abstract

The present invention discloses a tire positioning detection mechanism, which is used in a tire dynamic balancing tester, and includes a lifting bracket for placing a tire. A through hole is provided in the center of the lifting bracket for the lower wheel rim to pass through and support the tire. A detection part is provided on the upper end surface of the outer periphery of the through hole to detect the placement position of the tire. The detection part is distributed on both sides of the axis of the through hole. The detection part is provided on the upper end surface of the lifting bracket. When the tire is placed on the lifting bracket, the detection part can detect its placement position, and then determine whether the tire is placed crookedly. If the tire is placed crookedly, it is centered; if it is not placed crookedly, a dynamic balance detection is directly performed. Thereby, centering of a tire that has been placed correctly is avoided, test time is saved, and test efficiency is improved. The present invention also provides a tire positioning detection method based on the above-mentioned tire positioning detection mechanism, which can improve the efficiency of tire dynamic balance detection.

Description

Technical Field

[0001] The present invention relates to the technical field of experimental equipment, and in particular to a tire positioning detection mechanism. The present invention also relates to a tire positioning detection method based on the tire positioning detection mechanism. Background Art

[0002] The tire dynamic balance tester is a special testing equipment for fully automatic online testing of tire dynamic balance performance. The tire is generally transported to the test station by a servo motor-driven synchronous belt after being centered at the previous station. If the positioning in the previous link is inaccurate, or the tire is not transported in place, the tire is sent to the test station, the lifting bracket falls, and the tire bead and rim cannot fit correctly, which will cause the tire to be installed crookedly, affecting the test data. If the crookedness is too large, it will cause the upper spindle to fall and puncture the tire, damaging the equipment.

[0003] In the prior art, tire dynamic balancing testers usually use roller conveyors, and the test station has a centering device fixed on a lifting bracket. Each time a tire enters the test station, the centering device will center the tire. Although the centering operation can avoid skewed mounting, it will reduce the efficiency of tire dynamic balancing detection.

[0004] Therefore, how to improve the efficiency of tire dynamic balance detection is a technical problem that technical personnel in this field urgently need to solve. Summary of the invention

[0005] The purpose of the present invention is to provide a tire positioning detection mechanism, which can detect the position of the tire on the lifting bracket, and then determine whether the tire is skewed. If the tire is skewed, it is centered by a centering device, thereby improving the detection efficiency of the tire dynamic balance. Another purpose of the present invention is to provide a tire dynamic balance tester including the above tire positioning detection mechanism, which has a high detection efficiency.

[0006] To achieve the above-mentioned purpose, the present invention provides a tire positioning detection mechanism for a tire dynamic balancing tester, comprising a lifting bracket for placing a tire, a through hole for the lower wheel rim to pass through in the center of the lifting bracket to support the tire, a detection portion for detecting the placement position of the tire is provided on the upper end surface of the outer periphery of the through hole, and the detection portion is distributed on both sides of the axis of the through hole.

[0007] Preferably, all of the detection units are distributed along the conveying direction of the tire.

[0008] Preferably, the detection parts are symmetrically distributed on both sides of the center of the via hole.

[0009] Preferably, it also includes a judgment device connected to the detection unit for judging whether the tire is installed crookedly, and the judgment device includes a first judgment unit for judging whether the tire is placed crookedly when only the detection unit located on one side of the center of the through hole detects the tire during the placement of the tire.

[0010] Preferably, the judging device further comprises a second judging unit for judging whether the tire is crooked when the time difference between the detection units located on both sides of the center of the through hole and the tire is greater than a preset time difference during the process of the lower rim lifting the tire upward.

[0011] Preferably, the detection part comprises at least two detection part groups for detecting tires of different sizes, each detection part group comprises at least two detection parts, and the detection parts in the same detection part group are at the same distance from the center of the through hole.

[0012] Preferably, the lifting bracket is provided with a slide groove extending along the conveying direction of the tire, a slider is provided in the slide groove, and the detection part is connected to the slider to adjust the position of the detection part along the conveying direction of the tire.

[0013] Preferably, it also includes an alarm device connected to the judgment device for issuing an alarm when the tire is skewed.

[0014] Preferably, the alarm device is an alarm light or an alarm buzzer.

[0015] The present invention also provides a tire positioning detection method, comprising:

[0016] Acquiring detection data from a detection unit, and determining status information of the tire according to the detection data;

[0017] It is determined whether the tire is skewed based on the status information.

[0018] Preferably, if the state information includes a placement position, determining whether the tire is skewed according to the state information includes:

[0019] Determining whether the tire is coaxial with the through hole on the lifting bracket according to the placement position;

[0020] If not, it is determined that the tire is skewed.

[0021] Preferably, if the state information includes the time when the tire leaves the upper end surface of the lifting bracket, determining the state information of the tire according to the detection data includes:

[0022] Determine, based on the detection data, a first disengagement time when the tire leaves the upper end surface of the lifting bracket on one side of the through hole, and a second disengagement time when the tire leaves the upper end surface of the lifting bracket on the other side of the through hole when the lower rim lifts the tire upward;

[0023] calculating a disengagement time difference according to the first disengagement time and the second disengagement time;

[0024] The step of determining whether the tire is skewed according to the state information comprises:

[0025] The disengagement time difference is compared with a preset time difference. If the disengagement time difference is greater than the preset time difference, the tire is skewed; otherwise, the tire is not skewed.

[0026] The tire positioning detection mechanism provided by the present invention is used in a tire dynamic balancing tester, and includes a lifting bracket for placing the tire. A through hole is provided in the center of the lifting bracket for the lower wheel rim to pass through and support the tire. A detection part is provided on the upper end surface of the outer periphery of the through hole to detect the placement position of the tire. The detection part is distributed on both sides of the axis of the through hole. The detection part is provided on the upper end surface of the lifting bracket. When the tire is placed on the lifting bracket, the detection part can detect its placement position and then determine whether the tire is placed crookedly. If the tire is placed crookedly, it is centered; if it is not placed crookedly, a dynamic balancing test is directly performed. This avoids centering the tire that has been placed properly, saves test time, and improves test efficiency.

[0027] The present invention also provides a tire positioning detection method based on the above tire positioning detection mechanism, which can improve the efficiency of tire dynamic balance detection. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the provided drawings without paying creative work.

[0029] Figure 1 A structural schematic diagram of a tire positioning detection mechanism provided by the present invention;

[0030] Figure 2 for Figure 1 A top view of the tire positioning detection mechanism;

[0031] Figure 3 This is the front view of the tire being skewed during transportation;

[0032] Figure 4 This is a top view of the tire being skewed during transportation;

[0033] Figure 5 This is a schematic diagram of a tire being skewed during the installation process.

[0034] in, Figures 1 to 5 The reference numerals in the drawings are:

[0035] Servo motor 1 , lifting bracket 2 , tire 3 , upper rim 4 , detection unit 5 , lower rim 6 , transmitter 51 , and receiver 52 . DETAILED DESCRIPTION

[0036] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0037] In order to enable those skilled in the art to better understand the scheme of the present invention, the present invention is further described in detail below in conjunction with the accompanying drawings and specific implementation methods.

[0038] Please refer to Figures 1 to 5 , Figure 1 A structural schematic diagram of a tire positioning detection mechanism provided by the present invention; Figure 2 for Figure 1 A top view of the tire positioning detection mechanism; Figure 3 This is the front view of the tire being skewed during transportation; Figure 4 This is a top view of the tire being skewed during transportation; Figure 5 This is a schematic diagram of a tire being skewed during the installation process.

[0039] The tire positioning detection mechanism provided by the present invention is used to perform positioning detection on the tire 3 detected on the tire dynamic balancing tester. Figure 1 and Figure 2 As shown, the tire positioning detection mechanism includes a lifting bracket 2 and a detection unit 5 located on the upper end surface of the lifting bracket 2. The tire 3 is transported to the lifting bracket 2 by a conveying device such as a roller, and the detection unit 5 can detect the position of the tire 3 and then determine whether the tire 3 is skewed.

[0040] Specifically, the lifting bracket 2 is rectangular, and a servo motor 1 for driving the lifting bracket 2 is provided on one side. The center of the lifting bracket 2 has a through hole penetrating in the thickness direction. The tire 3 needs to be placed at a position coaxial with the through hole, and then the lower rim 6 rises, and the upper rim 4 cooperates to clamp the tire 3. The detection unit 5 can be specifically a structure such as a strain gauge set in the middle of the upper end surface of the lifting bracket 2. When the tire 3 is placed on the upper end surface of the lifting bracket 2, the strain gauge is deformed, and then the position of the tire 3 is determined, and then the tire 3 is judged whether it is skewed by the position of the tire 3. Of course, the detection unit 5 can also use an infrared detection switch, which includes a transmitter 51 and a receiver 52. The transmitter 51 and the receiver 52 are respectively arranged on both sides of the conveying direction of the tire 3. The infrared rays will be blocked during the conveying process of the tire 3, so as to detect the position of the tire 3. Of course, if an infrared detection switch is used to detect the position of the tire 3, its transmitter 51 and receiver 52 must be higher than the upper end surface of the lifting bracket 2 and lower than the width of the tire 3.

[0041] In addition, the tire 3 needs to be placed at a position coaxial with the via hole, and the detection unit 5 needs to detect whether both sides of the tire 3 are placed in place, so the detection unit 5 needs to be distributed on both sides of the via hole axis. If the tire 3 is not detected on one side, it means that the tire 3 is placed crookedly.

[0042] In this embodiment, the tire positioning detection mechanism can detect whether the tire 3 is placed crookedly. If the tire 3 is crooked, it is centered; if the tire 3 is not crooked, a dynamic balance test is directly performed, thereby avoiding unnecessary centering operations, saving centering time, and improving detection efficiency.

[0043] Optionally, the tires 3 are usually transported to the lifting bracket 2 in the same direction, so all the detection parts 5 are arranged along the transport direction of the tires 3, such as Figure 2 As shown, the detection unit 5 is specifically an infrared detection switch, and its transmitter 51 and receiver 52 are respectively arranged on two sides parallel to the conveying direction.

[0044] Specifically, there are two detection parts 5, which are symmetrically distributed on both sides of the center of the via hole. The distance between the two detection parts is smaller than the diameter of the tire 3, and the difference between the distance between the two detection parts 5 and the diameter of the tire 3 is not greater than the allowable deviation range of the alignment between the tire 3 and the via hole. Of course, the user can also increase the density of the detection parts 5 as needed, thereby improving the detection accuracy.

[0045] The tire positioning detection mechanism also includes a judgment device connected to the detection unit 5. The detection signal of the detection unit 5 is transmitted to the judgment device, and the judgment device judges whether the tire 3 is placed crookedly according to the detection signal. Specifically, since the detection units 5 are symmetrically distributed on both sides of the center of the through hole, the first judgment unit can make a judgment based on the detection signals of the detection units 5 on both sides, such as Figure 3 and Figure 4 As shown, when the detection unit 5 on one side does not detect the tire 3, it means that the tire 3 is placed crookedly. The judgment device can be specifically a single chip microcomputer or a PLC controller, etc., and the first judgment unit can be specifically a switch circuit in the judgment device.

[0046] In addition, during the process of checking the dynamic balance of the tire, the lower rim 6 moves upward to lift the tire 3. When the tire 3 is lifted, it is easy to become skewed due to uneven mass distribution. At this time, if the upper rim 4 and the lower rim 6 clamp the tire 3, the tire 3 may be scratched or the rim may be damaged. Therefore, it is necessary to check whether the tire 3 is skewed before clamping.

[0047] Specifically, Figure 5 As shown, if the tire 3 is skewed during the lifting process, one side of the tire 3 will leave the upper end surface of the lifting bracket 2 first, and the side opposite to it will leave the upper end surface of the lifting bracket 2 last. The judgment device also includes a second judgment unit, which is connected to the detection unit 5. During the process of the lower rim 6 lifting the tire 3 upward, the second judgment unit receives the detection signals of the detection units 5 on both sides of the through hole, and there will be a time difference between the two detection signals. When the time difference between the two detection signals is greater than the preset time difference, the second judgment unit determines that the tire 3 is skewed during the clamping process. The second judgment unit can refer to the clock circuit or timer in the prior art.

[0048] In this embodiment, the judging device is provided with a first judging part and a second judging part, wherein the first judging part is used to judge whether the tire 3 is skewed when placed on the lifting bracket 2, and the second judging part is used to judge whether the tire 3 is skewed when the lower wheel rim 6 lifts the tire 3. Thus, the tire 3 can be adjusted in time to avoid scratching the tire 3 during the clamping process.

[0049] In addition, the diameters of the tires 3 for dynamic balancing detection often vary to a certain extent, so in order to locate multiple tires 3, in a specific embodiment of the present invention, the detection unit 5 includes at least two detection unit groups, each detection unit group is used to detect tires 3 of different diameters. Figure 1 and Figure 2 As shown, the tire positioning detection mechanism has two detection unit groups, each detection unit group includes two detection units 5 distributed along the conveying direction of the tire 3, and the distances between the two detection units 5 and the center of the through hole are equal. Of course, the user can also set three or four detection units 5 in one detection unit group as needed, which is not limited here.

[0050] Furthermore, the lifting bracket 2 may also be provided with a slide groove along the conveying direction of the tire 3, in which a slider is provided, and the detection unit 5 is connected to the slider and moves along the conveying direction of the tire 3 driven by the slider. Specifically, slide grooves are provided on the upper end surfaces on both sides of the lifting bracket 2, and the cross-sections of the slide grooves and the slider may be convex-shaped, and the two are clearance-matched. The slider has a wiring hole extending along the length direction, and its upper end surface has a mounting hole for installing the detection unit 5, the mounting hole is connected to the wiring hole, the detection unit 5 is arranged in the mounting hole, and the transmission line of the detection unit 5 is arranged in the wiring hole. Of course, the tire positioning detection mechanism may also be provided with a group of detection unit groups, and the detection unit 5 is moved to the corresponding position before the tires 3 of different diameters need to be detected.

[0051] In addition, some tire dynamic balancing testers in the prior art are not provided with a centering device. Once the tire 3 is skewed, it needs to be manually centered. Therefore, the tire positioning detection mechanism is also provided with an alarm device. Specifically, the alarm device is an alarm light or an alarm buzzer connected to the judgment device. When the tire 3 is skewed, the alarm device receives the alarm instruction sent by the judgment device, and then issues an alarm to prompt the operator to center the tire 3. Of course, the alarm device may also include a first alarm unit and a second alarm unit respectively connected to the first judgment unit and the second judgment unit. When different types of skew occur in the tire 3, the first alarm unit and the second alarm unit may issue different types of alarm signals, thereby facilitating the operator to perform corresponding centering operations.

[0052] In this embodiment, the tire positioning detection mechanism is provided with a plurality of detection unit groups, and different detection unit groups are used to detect tires 3 of different diameters, thereby improving the versatility of the tire positioning detection mechanism. In addition, the tire positioning detection mechanism is also provided with a slide groove and a slider, and the slider moves in the slide groove to adjust the position of the detection unit 5, so that the detection unit 5 can detect tires 3 of different diameters, further improving the versatility of the tire positioning detection mechanism. In addition, the tire positioning detection mechanism is also provided with an alarm device. If the tire dynamic balancing tester is not provided with a centering device, the alarm device can prompt the operator to perform a centering operation.

[0053] The present invention also provides a tire positioning detection method, comprising:

[0054] Acquire detection data of the detection unit 5, and determine the state information of the tire 3 according to the detection data;

[0055] The detection unit 5 detects whether the tire 3 is placed on the lifting bracket 2 to generate detection data, and the detection data includes whether the tire 3 is placed on the lifting bracket 2. The placement position and the separation time of the tire 3 from the upper end surface of the lifting bracket 2. The judgment device judges the state of the tire 3 based on the detection data to determine whether the tire 3 is skewed.

[0056] Optionally, if the state information includes the placement position, determining whether the tire 3 is skewed according to the state information includes:

[0057] Determine whether the tire 3 is coaxial with the through hole on the lifting bracket 2 according to the placement position;

[0058] As described above, the detection parts 5 are distributed on both sides of the via hole. If the detection parts 5 detect the tire 3, it means that the tire 3 is placed on the lifting bracket 2. If the detection parts 5 on both sides of the via hole detect the presence of the tire 3, it means that the tire 3 is coaxial with the via hole on the lifting bracket 2.

[0059] If not, it is determined that the tire 3 is skewed.

[0060] If the detection unit 5 on only one side detects the existence of the tire 3, it means that the tire 3 is not coaxial with the through hole on the lifting bracket 2, that is, the tire 3 is skewed.

[0061] Furthermore, the tire 3 positioning detection mechanism can also detect whether the tire 3 is skewed when leaving the upper end surface of the lifting bracket 2.

[0062] If the status information includes the time when the tire 3 leaves the upper end surface of the lifting bracket 2, the status information of the tire 3 is determined according to the detection data, including:

[0063] Determine, according to the detection data, a first separation time when the tire 3 leaves the upper end surface of the lifting bracket 2 on one side of the through hole, and a second separation time when the tire 3 leaves the upper end surface of the lifting bracket 2 on the other side of the through hole when the lower rim lifts the tire 3 upward;

[0064] calculating a disengagement time difference according to the first disengagement time and the second disengagement time;

[0065] When the detection unit 5 detects that the tire 3 disappears from the lifting bracket 2, the judgment device can record the detachment time of the tire 3. The detachment times on both sides of the tire 3 are respectively the first detachment time and the second detachment time. There is often a difference between the first detachment time and the second detachment time, and the absolute value of the difference between the two is the detachment time difference.

[0066] Determining whether the tire 3 is skewed according to the state information includes:

[0067] The disengagement time difference is compared with the preset time difference. If the disengagement time difference is greater than the preset time difference, the tire 3 is skewed; otherwise, the tire 3 is not skewed.

[0068] If the time difference of separation is large, it means that one side of the tire 3 leaves the upper end surface of the lifting bracket 2 a long time later than the other side of the tire 3 leaves the upper end surface of the lifting bracket 2, so the judging device judges that the tire 3 is skewed based on this.

[0069] It should be noted that, in this specification, relational terms such as first and second are merely used to distinguish one entity from other entities, but do not necessarily require or imply any actual relationship or order between these entities.

[0070] The tire positioning detection mechanism and tire positioning detection method provided by the present invention are introduced in detail above. Specific examples are used in this article to illustrate the principle and implementation method of the present invention. The description of the above embodiments is only used to help understand the method and core idea of ​​the present invention. It should be pointed out that for ordinary technicians in this technical field, without departing from the principle of the present invention, the present invention can also be improved and modified in a number of ways, and these improvements and modifications also fall within the scope of protection of the claims of the present invention.

Claims

1. A tire positioning detection mechanism, used in a tire dynamic balancing tester, It is characterized in that The invention comprises a lifting bracket (2) for placing a tire (3), wherein a through hole is provided at the center of the lifting bracket (2) for a lower wheel rim (6) to pass through so as to support the tire (3), and a detection part (5) is provided on the upper end surface of the outer periphery of the through hole for detecting the placement position of the tire (3), and the detection part (5) is distributed on both sides of the axis of the through hole; All of the detection parts (5) are distributed along the conveying direction of the tire (3), and the detection parts (5) are symmetrically distributed on both sides of the center of the through hole; the tire (3) is conveyed to the lifting bracket (2) by a conveying device; The lifting bracket (2) is provided with a slide groove extending along the conveying direction of the tire (3), a slider is provided in the slide groove, and the detection part (5) is connected to the slider to adjust the position of the detection part (5) along the conveying direction of the tire (3).

2. The tire positioning detection mechanism according to claim 1, It is characterized in that It also includes a judgment device connected to the detection unit (5) for judging whether the tire (3) is installed crookedly, and the judgment device includes a first judgment unit for judging whether the tire (3) is placed crookedly when only the detection unit (5) located on one side of the center of the through hole detects the tire (3) during the placement of the tire (3).

3. The tire positioning detection mechanism according to claim 2, It is characterized in that The judging device further comprises a second judging unit for judging whether the tire (3) is skewed when the time difference between the detection unit (5) located on both sides of the center of the through hole and the tire (3) is greater than a preset time difference during the process of the lower wheel rim (6) lifting the tire (3) upward.

4. The tire positioning detection mechanism according to any one of claims 1 to 3, It is characterized in that The detection part (5) comprises at least two detection part groups for detecting tires (3) of different sizes, each detection part group comprises at least two detection parts (5), and the detection parts (5) in the same detection part group are at the same distance from the center of the through hole.

5. The tire positioning detection mechanism according to any one of claims 2 or 3, It is characterized in that It also includes an alarm device connected to the judgment device and used to issue an alarm when the tire (3) is skewed.

6. The tire positioning detection mechanism according to claim 5, It is characterized in that The alarm device is an alarm light or an alarm buzzer.

7. A tire positioning detection method, It is characterized in that The tire positioning detection mechanism applied to any one of claims 1 to 6, wherein the tire positioning detection method comprises: Acquiring detection data from a detection unit, and determining status information of the tire according to the detection data; It is determined whether the tire is skewed according to the status information.

8. The positioning detection method according to claim 7, It is characterized in that If the state information includes the placement position, determining whether the tire is skewed according to the state information includes: Determining whether the tire is coaxial with the through hole on the lifting bracket according to the placement position; If not, it is determined that the tire is skewed.

9. The positioning detection method according to claim 7, It is characterized in that If the state information includes the time when the tire leaves the upper end surface of the lifting bracket, determining the state information of the tire according to the detection data includes: Determine, based on the detection data, a first disengagement time when the tire leaves the upper end surface of the lifting bracket on one side of the through hole, and a second disengagement time when the tire leaves the upper end surface of the lifting bracket on the other side of the through hole when the lower rim lifts the tire upward; calculating a disengagement time difference according to the first disengagement time and the second disengagement time; The step of determining whether the tire is skewed according to the state information comprises: The disengagement time difference is compared with a preset time difference. If the disengagement time difference is greater than the preset time difference, the tire is skewed; otherwise, the tire is not skewed.

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