Three-suction-cup limit rod control device

Abstract

A three-suction cup limit rod control. The device is adsorbed on the engine hood through the suction cups. A hinge seat is fixed on the suction cup seat of the suction cup. A hinge plate is connected inside the hinge seat to form a planar pair and a rotating pair. When the wheels turn, the connecting rod will generate an arc-shaped displacement with the vertical line where the rotation center point of the wheel is located as the rotation axis. At this time, under the action of the planar pair and the rotating pair, the limit rod can pull the hinge plate to rotate around the vertical pin shaft and can push and pull the vertical pin shaft to slide along the long hole. Therefore, the control device can be linked with the limit rod, and the situation that the limit rod is jammed due to turning will not occur; in addition, the horizontally arranged sliding surface in the planar pair can provide horizontal limit for the hinge plate. Therefore, the hinge plate can limit the limit rod through the sliding seat, so that it will not swing with the wheel axis as the rotation axis, and can control the sensor to always be in a relatively static state with the wheel, realizing continuous speed measurement, and can be applied to road speed measurement tests in various forms.

Description

Technical Field

[0001] The invention relates to the field of automobile speed measuring equipment, and in particular to a three-suction cup limit rod control device. Background Art

[0002] In vehicle road tests, there are many tests that require measuring wheel speed, such as ABS test, TCS test, ESP test, etc. All cars equipped with ABS system can obtain wheel speed through ABS wheel speed sensor. The signal acquisition method is to connect the test circuit in parallel to the signal line of the wheel speed sensor. However, this method adds an external load to the ABS controller. On the one hand, it may cause the ABS system to alarm due to sensor impedance mismatch and exit ABS control; on the other hand, obtaining wheel speed from the external line on the original packaged ABS wiring harness will affect the safety of the ABS system, such as waterproof performance. Therefore, some manufacturers and colleges have developed wheel speed sensors that are mounted on the wheel hub, and use the wheel speed sensor to measure the wheel speed during road tests alone. For example, the invention patent with application number: 2012101887649 proposes a vehicle wheel speed detection device, in which a tachometer generator is connected to the wheel hub of the vehicle, and a fixing mechanism is connected to the side of the upper fender, and the fixing mechanism is connected to the tachometer generator through a connecting rod. The tachometer generator is limited by the connecting rod that can rotate at both ends and can be retracted as a whole, so as to avoid the tachometer motor rotating with the wheel to achieve speed measurement, and solve the problem of interference with the wheel due to the bouncing of the suspension and the problem of interference with the camber of the wheel. Although the detection device solves many problems of mutual interference, it is still only applicable to straight road tests of vehicles. If the wheel is turned during a curve test, the connecting rod will produce an arc displacement with the vertical line where the rotation center of the wheel is located as the rotation axis. Under the limitation of the fixing mechanism, it will cause the tachometer generator and the connecting rod to be stuck or the entire tachometer device to be pulled off. Summary of the invention

[0003] In order to solve the above problems, the present invention proposes a three-suction cup limit rod control device.

[0004] The technical solution of the present invention is: a three-suction cup limit rod control device, comprising a limit rod hinged on an encoder, the device also comprising a sliding seat, a hinge seat, a hinge plate, and a suction cup seat;

[0005] The sliding seat sleeve forms a cylindrical pair on the upper part of the limit rod, the suction cup seat is horizontally arranged and a suction cup is provided on the bottom surface of the suction cup seat, one end of the hinge seat is fixedly connected to the upper surface of the suction cup seat, a square slide groove is provided in the hinge seat to form the hinge seat into a U-shaped fork, the sliding surface in the square slide groove is set as a horizontal plane, and long slide holes are provided on both ear plates of the hinge seat, and the two long slide holes are facing downward; one end of the hinge plate is inserted into the square slide groove of the hinge seat to form a plane pair, and a vertical pin shaft is inserted between the two long slide holes. The vertical pin shaft passes through the circular hole set at the end of the hinge plate to form a rotating pair with the hinge plate, and the other end of the hinge plate is fixedly connected or hinged to the sliding seat.

[0006] Preferably, the suction cup seat is in the shape of a triangular plate, and three suction cups are provided on the bottom surface of the suction cup seat, and the three suction cups are all close to the corners of the suction cup seat.

[0007] Preferably, a long hole is provided at the two corners of the suction cup seat toward the center, and a screw rod passing through the long hole upwards is provided on the corresponding suction cup, and fastening nuts are provided at both ends of the screw rod.

[0008] Preferably, the hinge plate and the sliding seat are hinged so that the sliding seat can swing up and down at the end of the hinge plate.

[0009] Preferably, a U-shaped seat is provided at the center of the upper surface of the suction cup seat, and the hinge seat is fixed in the U-shaped seat by bolts.

[0010] Preferably, the limiting rod is configured as a circular hollow rod.

[0011] The beneficial technical effects of the present invention are:

[0012] (1) The limit rod control device is attached to the hood of the car through a suction cup.

[0013] A hinge seat is fixed on the disc seat, and a hinge plate is connected inside the hinge seat to form a plane pair and a rotation pair. When the wheel turns, the connecting rod will produce an arc displacement with the vertical line where the rotation center of the wheel is located as the rotation axis. At this time, under the action of the plane pair and the rotation pair, the limit rod can pull the hinge plate to rotate with the vertical pin as the center, and can push and pull the vertical pin to slide along the long hole. Therefore, the control device can be linked with the limit rod, and the situation where the limit rod is stuck due to the turning of the wheel will not occur; in addition, the sliding surface horizontally arranged in the plane pair can provide horizontal limit for the hinge plate, so the hinge plate can limit the limit rod through the sliding seat, so that it will not swing with the wheel axis as the rotation axis. When the wheel turns, the sensor can be controlled to always be in a relatively static state with the wheel, so as to achieve continuous speed measurement. It has strong functionality and can be suitable for road speed measurement tests in various forms.

[0014] (2) There are three suction cups on the suction cup seat of the limit rod control device. Two of the suction cups can slide in and out to adjust their positions. Therefore, the distance between the three suction cups can avoid the convex ridges or steps on the engine hood, and the adsorption is more firm. And these two suction cups can adjust their height on the bottom surface of the suction cup through screws and fastening nuts. Therefore, the suction cup seat can be adjusted to a horizontal state on the engine hood, avoiding the inclination of the planar pair between the hinge seat and the hinge plate caused by the inclination of the suction cup seat, and ensuring the limiting effect of the planar pair on the limit rod. Description of the Drawings

[0015] Figure 1 is a schematic three-dimensional structure diagram of the present invention;

[0016] Figure 2 is Figure 1 a partial view in

[0017] Figure 3 is Figure 2 a cross-sectional view taken at B in

[0018] Figure 4 a schematic top view structure diagram of the suction cup seat and the suction cups;

[0019] Figure 5 is Figure 4 a sectional view taken along the A-A direction of

[0020] In the figure, 11. Limit rod, 12. Sliding seat, 13. Hinge seat, 131. Square chute, 132. Long sliding hole, 14. Hinge plate, 141. Round hole, 15. Suction cup seat, 151. Suction cup, 152. Long hole, 153. Screw, 154. Fastening nut, 155. U-shaped seat, 16. Vertical pin shaft, 17. Encoder. Detailed Embodiment

[0021] Embodiment 1. Refer to the attached drawings of the specification Figures 1-5, A three-suction-cup limit rod control device, including a limit rod hinged to an encoder. The device further includes a sliding seat, a hinge seat, a hinge plate, and a suction cup seat; the sliding seat is sleeved on the upper part of the limit rod to form a cylindrical pair. The suction cup seat is horizontally arranged and suction cups are provided on the bottom surface of the suction cup seat. One end of the hinge seat is fixedly connected to the upper surface of the suction cup seat. A square chute is provided inside the hinge seat to form a U-shaped fork. The sliding surface inside the square chute is set as a horizontal plane. Long sliding holes are provided on both ear plates of the hinge seat, and the two long sliding holes face downward. One end of the hinge plate is inserted into the square chute of the hinge seat to form a planar pair. The horizontally arranged sliding surface in the planar pair can provide horizontal limit to the hinge plate. Therefore, the hinge plate can limit the limit rod through the sliding seat so that it will not swing with the wheel axis as the rotation axis. A vertical pin shaft is inserted between the two long sliding holes. The vertical pin shaft passes through a circular hole provided at the end of the hinge plate to form a rotating pair. The functions of this rotating pair and the above-mentioned planar pair enable the limit rod to pull the hinge plate to rotate around the vertical pin shaft and can push and pull the vertical pin shaft to slide along the long hole. Therefore, the control device can be linked with the limit rod, and the situation that the limit rod is jammed due to steering will not occur. The other end of the hinge plate is fixedly connected or hinged to the sliding seat.

[0022] The engine hood of an automobile is usually inclined towards the front of the vehicle, and convex ribs and steps are usually provided on the engine hood. Therefore, the suction cup seat is in the shape of a triangular plate, and three suction cups are provided on the bottom surface of the suction cup seat. The three suction cups are all close to the corners of the suction cup seat. The spacing between the three suction cups can avoid the convex ribs or steps on the engine hood, and the adsorption is more firm. Long holes are provided from the two corners of the suction cup seat towards the center. Corresponding suction cups are provided with screws passing upward through the long holes, and fastening nuts are provided at both ends of the screws. These two suction cups can adjust their heights on the bottom surface of the suction cup through the screws and fastening nuts. Therefore, the suction cup seat can be adjusted to a horizontal state on the engine hood.

[0023] The hinge plate and the sliding seat are set to be hinged, so that the sliding seat can swing up and down at the end of the hinge plate. The hinged method can add a degree of freedom between the hinge plate and the sliding seat, improve the flexibility among the hinge plate, the sliding seat, and the limit rod, and make the linkage among the entire device smoother.

[0024] A U-shaped seat is provided at the center of the upper surface of the suction cup seat. The hinge seat is fixed inside the U-shaped seat through bolts. The U-shaped seat is provided to leave an installation space for the hinge seat and also facilitate the installation and disassembly between the hinge seat and the suction cup seat. The limit rod is a circular hollow rod, which is beneficial to reducing the overall weight of the limit rod control device.

[0025] The usage method of the present invention is:

[0026] First step, sleeving the sliding seat of the control device on the upper part of the limit rod, adjusting the distances between the three suction cups respectively to avoid the convex ridges or steps on the engine hood, sucking the three suction cups tightly on the engine hood, and then adjusting the fastening nuts on the screws of two of the suction cups to adjust the suction cup seat to a horizontal state. At this time, the planar pair between the hinge seat and the hinge plate is in a horizontal state.

[0027] Second step, during the speed measurement process when the wheel rotates, the connecting rod will generate an arc displacement with the vertical line where the rotation center point of the wheel is located as the rotation axis. At this time, under the action of the planar pair and the rotating pair, the limit rod can pull the hinge plate to rotate around the vertical pin shaft and can push and pull the vertical pin shaft to slide along the long hole. Therefore, the control device can be linked with the limit rod to control the limit rod, and the situation that the limit rod is jammed due to the wheel turning will not occur.

[0028] Third step, when the hinge plate slides in the square chute, the horizontally arranged sliding surface in the planar pair can provide horizontal limitation for the hinge plate. Therefore, the hinge plate can limit the limit rod through the sliding seat, so that it will not swing with the wheel axis as the rotation axis. When the wheel turns, it can control the sensor to always be in a relatively static state with the wheel, realizing continuous speed measurement, with strong functionality and being applicable to road speed measurement tests in various forms.

Claims

1. A three-suction cup limit rod control device, including a limit rod hinged to an encoder, characterized in that: The device further includes a sliding seat, a hinge seat, a hinge plate, and a suction cup seat; The sliding seat is sleeved on the upper part of the limit rod to form a cylindrical pair. The suction cup seat is horizontally arranged and suction cups are provided on the bottom surface of the suction cup seat. One end of the hinge seat is fixedly connected to the upper surface of the suction cup seat. A square chute is provided in the hinge seat to form a U-shaped fork. The sliding surface in the square chute is set as a horizontal plane. Long sliding holes are provided on both ear plates of the hinge seat, and the two long sliding holes face downward. One end of the hinge plate is inserted into the square chute of the hinge seat to form a planar pair. A vertical pin shaft is inserted between the two long sliding holes. The vertical pin shaft passes through a circular hole provided at the end of the hinge plate to form a rotating pair with the hinge plate. The other end of the hinge plate is hinged to the sliding seat, enabling the sliding seat to swing up and down at the end of the hinge plate. A U-shaped seat is provided at the center of the upper surface of the suction cup seat, and the hinge seat is fixed in the U-shaped seat by bolts; The suction cup seat is in the shape of a triangular plate, and three suction cups are provided on the bottom surface of the suction cup seat. The three suction cups are all close to the corners of the suction cup seat. A long hole is provided from the two corners of the suction cup seat towards the center. A screw rod that passes upward through the long hole is provided on the corresponding suction cup, and fastening nuts are provided at both ends of the screw rod.

2. The three-suction-cup limit rod control device according to claim 1, characterized in that: The limit rod is a circular hollow rod.

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