CN219038273U - Tyre mass center measuring device - Google Patents

Abstract

The utility model discloses a tire centroid measuring device which comprises a frame, wherein two tire centroid measuring mechanisms are symmetrically arranged on the frame, each tire centroid measuring mechanism comprises a bedplate, a plurality of weighing sensors are arranged at the bottom of each bedplate, and each weighing sensor is connected with the inner wall of the frame through a floating ball seat; the weighing sensors are symmetrically divided into two groups at the bottoms of the corresponding bedplate, and the two groups of weighing sensors are symmetrically distributed at two ends of the bedplate in the length direction; the utility model utilizes the mature weighing technology and the lever principle, can accurately calculate the distance between the central axis of the tire and the central axis of the frame, and can effectively improve the accuracy and reliability of the front wheel steering angle inspection bench for the automobile in identifying and searching the tire after being matched with the front wheel steering angle inspection bench for the high automobile.

Description

Tyre mass center measuring device

Technical Field

The utility model relates to the field of automobile detection equipment, in particular to a tire centroid measuring device.

Background

When the automobile main engine factory detects the steering angle of an automobile steering wheel (usually a front wheel), the central position of a tire is required to be positioned due to different wheel tread values of different automobile types, and when the center of a turntable of the steering angle inspection bench is aligned with the center of the tire, the automobile steering wheel can be opened to the turntable, so that the next detection of the steering angle can be performed after the center of the tire is ensured to be overlapped with the center of the turntable.

As shown in fig. 3, the positioning mode of the steering wheel by the current steering angle inspection bench is mainly a reflective photoelectric switch searching technology, which is as follows: the motor 8 drives the screw rod 7 to drive the two movable tables 5 to move from the middle part of the frame 4 to the two ends, and after the reflective photoelectric switch 9 searches the edges of the tires, a reflective signal is given, so that the system drives the movable tables 5 to move a distance of half of the width of the tire according to the preset tire size of the steering wheel, and at the moment, the central axes of the top view projections of the turntable 6, the reflective photoelectric switch 9 and the tire 10 are collinear, so that the alignment of the tire is considered.

However, in the actual use process, most tires are black, so that light is not easy to reflect, particularly the running tires are cleaner, the light reflecting effect is poorer, and the cambered surface of the tires can cause unreliable light reflection, so that the tire searching is frequently failed.

Disclosure of Invention

The present utility model is directed to a tire centroid measuring device, which solves the above-mentioned problems in the prior art.

In order to achieve the above purpose, the present utility model provides the following technical solutions:

the utility model provides a tire centroid measuring device, includes the frame, two tire centroid measuring mechanism are installed to the symmetry in the frame, tire centroid measuring mechanism includes the platen, a plurality of weighing sensor are installed to the bottom of platen, weighing sensor passes through the floating ball seat and is connected with the inner wall of frame.

As a further scheme of the utility model: the weighing sensors are symmetrically divided into two groups at the bottoms of the corresponding tables, and the two groups of weighing sensors are symmetrically distributed at two ends of the tables in the length direction.

As a further scheme of the utility model: each group of weighing sensors are mutually connected in parallel.

Compared with the prior art, the utility model has the beneficial effects that:

the utility model utilizes the mature weighing technology and the lever principle, can accurately calculate the distance between the central axis of the tire and the central axis of the frame, and can effectively improve the accuracy and reliability of the front wheel steering angle inspection bench for the automobile in identifying and searching the tire after being matched with the front wheel steering angle inspection bench for the high automobile.

Drawings

FIG. 1 is a schematic diagram of a tire centroid measuring device.

FIG. 2 is a schematic cross-sectional view of a tire centroid measurement device.

Fig. 3 is a schematic structural view of a steering angle inspection bench for front wheels of automobiles in the prior art.

Wherein, frame 1, weighing sensor 2, platen 3, frame 4, movable table 5, carousel 6, lead screw 7, motor 8, reflective photoelectric switch 9, tire 10.

Detailed Description

In order to make the technical problems, technical schemes and beneficial effects to be solved more clear, the utility model will be further described in detail with reference to the following examples. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the utility model.

It will be understood that when an element is referred to as being "mounted" or "disposed" on another element, it can be directly on the other element or be indirectly on the other element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or be indirectly connected to the other element.

It is to be understood that the terms "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like indicate or are based on the orientation or positional relationship shown in the drawings, merely to facilitate describing the present utility model and simplify the description, and do not indicate or imply that the devices or elements referred to must have the orientation specific to the specification, be constructed and operated in the specific orientation, and thus should not be construed as limiting the present utility model.

Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include one or more such feature.

Referring to fig. 1-2, in an embodiment of the present utility model, a tire centroid measuring device includes a frame 1, two tire centroid measuring mechanisms are symmetrically installed on the frame 1, the tire centroid measuring mechanism includes a platen 3, four weighing sensors 2 are installed at the bottom of the platen 3, and the weighing sensors 2 are connected with an inner wall of the frame 1 through floating ball seats.

The four weighing sensors 2 comprise C1, C2, C3 and C4, and the C1, C2, C3 and C4 are fixedly arranged at four corners of the bottom of the bedplate 3 through bolts, wherein the C1 and the C2 are in a group and are mutually connected in parallel, and the C3 and the C4 are in a group and are mutually connected in parallel.

In this embodiment, frame 1 is adorned admittedly in the front end of car front wheel steering angle inspection bench, and car front wheel steering angle inspection bench includes frame 4, the top surface symmetry sliding connection of frame 4 has two movable tables 5, the inboard of frame 4 is all rotated with the corresponding department of movable table 5 and is connected with lead screw 7, the outer wall cooperation cover machine of lead screw 7 has ball nut, and ball nut and the movable table 5 fixed connection who corresponds, still install two motors 8 that are used for driving lead screw 7 pivoted in the frame 4, all install carousel 6 on the movable table 5.

Specifically, the central axes of the plan view projections of the frame 1 and the frame 4 are positioned on the same straight line.

When detecting the steering angle of the front wheels 10 of the automobile, the two front wheels 10 are moved to the corresponding bedplate 3 to measure the mass centers of the two front wheels 10 and calculate the wheel track of the two front wheels 10, and the specific principle is as follows:

taking the left-hand front wheel 10 of an automobile as an example, as shown in figure 1,

l1 is the distance between the central axis of the front wheel 10 and the left weighing sensor 2;

l2 is the distance between the central axis of the front wheel 10 and the weighing sensor 2 on the right side of the central axis;

l is the distance between the weighing sensors 2 on two sides of the front wheel 10;

l0 is the distance between the weighing sensor 2 on the right side of the front wheel 10 and the central axis of the frame 1;

l3 is the distance between the central axis of the front wheel 10 and the central axis of the frame 1;

wherein l1+l2=l, l2+l0=l3;

as shown in the figure 2 of the drawings,

g is the weight of the tire 10;

f1 is the total weight of tyre 10 assigned to its left hand load cell;

f2 is the total weight of tyre 10 assigned to its right-hand load cell;

thus, g=f1+f2.

The lever principle can be derived by combining fig. 1 and 2: f1×l1=f2×l2, then it can be deduced that:

L2＝F1×L/(F1+F2) (1)

because the dimensions of L and LO are fixed, the value of L3 of the left wheel 10 can be obtained by simple calculation by measuring specific values of F1 and F2.

Therefore, when the device is used in cooperation with the automobile front wheel steering angle inspection bench:

firstly, moving two front wheels 10 of an automobile to corresponding bedplate 3 to weigh the two front wheels 10 and calculate two L3 values; the control system of the automobile front wheel steering angle inspection bench starts the motor 8 to drive the screw rod 7 to rotate, so that the two movable platforms 3 move on the frame 4 until the distance between the central shaft of each turntable 6 and the central shaft of the frame 4 is equal to the corresponding L3 size, and the accurate alignment of the center of the turntable 6 and the center of the tire 10 is realized, and at the moment, the tire 10 is only required to be moved to the corresponding turntable 6, so that the accuracy and the reliability of the automobile front wheel steering angle inspection bench on tire identification and searching can be effectively improved.

Although the present utility model has been described with reference to the foregoing embodiments, it will be apparent to those skilled in the art that modifications may be made to the embodiments described, or equivalents may be substituted for elements thereof, and any modifications, equivalents, improvements and changes may be made without departing from the spirit and principles of the present utility model.

Claims (3)

1. A tire centroid measurement device, characterized by: the automatic tire center of mass measuring device comprises a frame (1), wherein two tire center of mass measuring mechanisms are symmetrically arranged on the frame (1), each tire center of mass measuring mechanism comprises a bedplate (3), a plurality of weighing sensors (2) are arranged at the bottom of each bedplate (3), and each weighing sensor (2) is connected with the inner wall of the frame (1) through a floating ball seat.

2. A tire centroid measuring device according to claim 1, wherein: the weighing sensors (2) are symmetrically divided into two groups at the bottoms of the corresponding tables (3), and the two groups of weighing sensors (2) are symmetrically distributed at two ends of the tables (3) in the length direction.

3. A tire centroid measuring device according to claim 2, wherein: each group of weighing sensors (2) are mutually connected in parallel.

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