CN210661283U

CN210661283U - Tensioning wheel capable of realizing self-detection of tensioning force and control system

Info

Publication number: CN210661283U
Application number: CN201921210255.5U
Authority: CN
Inventors: 种法典; 袁彬; 黄继轩; 邵清
Original assignee: Weichai Power Co Ltd
Current assignee: Weichai Power Co Ltd
Priority date: 2019-07-26
Filing date: 2019-07-26
Publication date: 2020-06-02
Anticipated expiration: 2029-07-26

Abstract

The utility model discloses a can realize tensioning wheel of tensile force self-checking, be in including fixed shell body and setting clockwork spring in the fixed shell body, a serial communication port, clockwork spring sets up fixedly connected with foil gage on the side of the one end of fixed shell body, the foil gage is connected clockwork spring is close to on the side of fixed shell body, the foil gage is connected with the controller electricity. The utility model provides a can realize tensioning wheel of tensile force self-checking, clockwork spring sets up fixedly connected with foil gage on the side of the one end of fixed shell body, can accurately obtain the tensile force size of take-up pulley, makes the judgement error little, and the reliability is high. The utility model also provides a control system of the take-up pulley that can realize tensile force self-detection.

Description

Tensioning wheel capable of realizing self-detection of tensioning force and control system

Technical Field

The utility model relates to an automobile inspection technical field, in particular to take-up pulley and control system that can realize tensile force self-detection.

Background

The tensioner is a belt tensioner for an automotive transmission. The tensioning wheel mainly comprises a fixed outer shell, a tensioning arm, a wheel body, a clockwork spring, a rolling bearing and a spring shaft sleeve. Two ends of the spring are respectively fixed on the fixed outer shell and the spring shaft sleeve.

The existing tensioning wheel does not have the capacity of self-detecting insufficient tensioning force, and the insufficient tensioning force of the tensioning wheel is fed back only through problems. The traditional detection means is that when the tensioning wheel tensioning force is not enough, the belt can be caused to slip to make a squeak sound, the sound of abnormal sound becomes large after the inner side of the belt sprays water, or the flow of a water pump is abnormal or the fuel consumption is increased, so that the problem that the tensioning force of the tensioning wheel is invalid is indirectly detected, the error of a judgment result is large, and the reliability is poor.

Therefore, how to provide a tensioning wheel capable of realizing self-detection of the tensioning force and a control system thereof, which can accurately obtain the tensioning force of the tensioning wheel, so that the judgment result error is small, the reliability is high, and the technical problem to be solved by the technical personnel in the field is urgently needed.

SUMMERY OF THE UTILITY MODEL

In view of this, the utility model provides a can realize tensioning wheel that tensile force self-checking detected, can accurately obtain the tensile force size of tensioning wheel, make the judged result error little, the reliability is high. The utility model also provides a control system of the take-up pulley that can realize tensile force self-detection.

In order to achieve the above object, the utility model provides a following technical scheme:

the utility model provides a can realize tensioning wheel of tensile force self-checking, is in including fixed shell body and setting spring in the fixed shell body, spring sets up fixedly connected with foil gage on the side of the one end of fixed shell body, the foil gage is connected spring is close to on the side of fixed shell body, the foil gage is connected with the controller electricity.

Preferably, the strain gauge is a resistive strain gauge.

Preferably, the strain gauge is adhered or embedded on the side surface of the clockwork spring.

Preferably, the controller is electrically connected with an alarm.

Preferably, the controller is an engine ECU.

The control system of the tensioning wheel capable of realizing self-detection of the tensioning force comprises the tensioning wheel capable of realizing self-detection of the tensioning force and further comprises a Wheatstone bridge, wherein the strain gauge is connected to the Wheatstone bridge, and the Wheatstone bridge is electrically connected with the controller.

Preferably, the strain gauge is a resistance strain gauge, the wheatstone bridge comprises a first parallel branch and a second parallel branch, a first fixed resistor and a second fixed resistor are sequentially connected in series on the first parallel branch, a third fixed resistor and the resistance strain gauge are sequentially connected in series on the second parallel branch, the rear end of the first fixed resistor and the rear end of the third fixed resistor are connected with a third line, the third line is connected with a voltmeter, and the voltmeter is electrically connected with the controller.

According to the technical scheme, the tension wheel capable of realizing self-detection and self-detection of the tension force is provided by the utility model, the spring is fixedly connected with the strain gauge on the side surface of one end of the fixed outer shell, the strain gauge is connected on the side surface of the spring close to the fixed outer shell, and the strain gauge is electrically connected with the controller; when the tensioning wheel is tensioned, the spring is stressed and deformed to extrude the strain gauge between the spring and the fixed outer shell, a strain signal of the strain gauge is transmitted to the controller, the controller detects the signal transmitted by the strain gauge in real time, and the tensioning wheel is visual and accurate in tensioning force detection result, small in error and higher in reliability.

The utility model also provides a control system of the take-up pulley that can realize tensile force self-checking, because the control system has foretell take-up pulley in, consequently have above-mentioned advantage.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.

Fig. 1 is a schematic structural diagram of a tensioning wheel capable of realizing self-detection of a tensioning force according to an embodiment of the present invention;

FIG. 2 is an enlarged schematic view of the structure of FIG. 1 where the strain gage is installed;

fig. 3 is a schematic structural diagram of a wheatstone bridge according to an embodiment of the present invention.

Detailed Description

The utility model discloses a can realize tensioning wheel that tensile force self-checking can accurately obtain the tensile force size of take-up pulley, makes the judged result error little, and the reliability is high. The utility model also provides a control system of the take-up pulley that can realize tensile force self-detection.

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

Please refer to fig. 1 to 3, the utility model discloses a can realize tensioning wheel of tensioning force self-checking, the tensioning wheel mainly comprises fixed shell body 1, tensioning arm, wheel body, clockwork spring 3, antifriction bearing, spring axle sleeve, and clockwork spring both ends are fixed respectively on fixed shell body 1 and spring axle sleeve. The clockwork spring 3 is arranged in the fixed outer shell 1, and other structures and connection relations are the same as those in the prior art and are not described again here.

In order to detect the tension of the tension wheel conveniently, the spring 3 is fixedly connected with the strain gauge 2 on the side face of one end of the fixed outer shell 1, the strain gauge 2 is connected to the side face, close to the fixed outer shell 1, of the spring 3, the strain gauge 2 is electrically connected with the controller, and the tension change of the tension wheel is monitored in real time through pressure signals. When the tension detection device is used, the spring 3 deforms under stress to extrude the strain gauge 2 between the spring 3 and the fixed outer shell 1, a strain signal of the strain gauge 2 is transmitted to the controller, the controller detects the signal transmitted by the strain gauge 2 in real time, the tension detection result of the tension wheel is visual and accurate, the error is small, the reliability is higher, and the tension of the tension wheel can be accurately judged without abundant experience of a user.

Specifically, the strain gauge 2 is a resistance strain gauge 7. The resistance strain gauge is an element for measuring strain. It can convert the change of strain on the mechanical member into a change of resistance. The resistance strain gage is made up by using constantan wire or nickel-chromium wire whose phi is 0.02-0.05mm, and making them be wound into a grid form (or using thin metal foil to make it be corroded into a grid form), and sandwiching them between two layers of insulating sheets (base). Silver-plated copper wires are connected with the strain gauge wire grids and used as resistance gauge lead wires.

The controller is an engine ECU, and the engine ECU is electrically connected with the alarm.

The resistance strain gauge 7 is a variable resistor, the resistance value of the resistance strain gauge 7 changes due to pressure change, so that the voltage between B, D points on the bridge changes, the tension change can be sensed through the voltage change, and different tensions correspond to different voltage values. And feeding back a voltage signal to the engine ECU, detecting whether the variation range of the tension is in a set range by the engine ECU, and controlling the alarm to give an alarm through the engine ECU if the tension range is lower than or higher than a set range value. The alarm is an audible and visual alarm, and can be understood as well as other types of common alarms.

In one embodiment, the strain gauge 2 is adhered or embedded on the side of the spring 3.

The utility model discloses a can realize the take-up pulley of tensile force self-checking, can realize the real time monitoring of take-up pulley tensile force, the not enough condition of tensile force is in time discovered, engine work efficiency and security have been improved greatly.

The utility model also provides a control system of the take-up pulley that can realize tensile force self-checking, control system includes the Wheatstone bridge, and resistance strain gauge 7 is connected on the Wheatstone bridge. The signal of the strain gauge 2 is detected by utilizing the Wheatstone bridge principle, and the sensitivity is high.

Specifically, the wheatstone bridge comprises a first parallel branch and a second parallel branch, the first parallel branch and the second parallel branch are connected in parallel on the bridge through A, C two points, a first fixed resistor 4 and a second fixed resistor 5 are sequentially connected in series on the first parallel branch, a third fixed resistor 6 and a resistor strain gauge 7 are sequentially connected in series on the second parallel branch, a third line is connected on the rear end of the first fixed resistor 4 and the rear end of the third fixed resistor 6, a voltmeter is connected on the third line, and the voltmeter is electrically connected with the controller. The first fixed resistor 4 and the third fixed resistor 6 are arranged close to the positive pole of the power supply of the bridge. It should be understood that the back end mentioned above refers to the end away from the positive pole of the bridge.

When the engine is started, the engine ECU detects whether the tension of the tension pulley meets the starting requirement, if not, the engine is started for protection, and if so, the engine is started normally. When the engine runs, the engine ECU detects the tension of the tension wheel in real time, and if the fed back tension force is continuously lower than the running requirement, the engine ECU controls the alarm to give an alarm to remind a user to check and maintain in time.

In the description of the present solution, it is to be understood that the terms "upper", "lower", "vertical", "inside", "outside", and the like indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the referred device or element must have a specific orientation, be constructed in a specific orientation, and be operated, and thus should not be construed as limiting the present solution.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present application, "a plurality" means two or more unless specifically limited otherwise.

The embodiments in the present description are described in a progressive manner, each embodiment focuses on differences from other embodiments, and the same and similar parts among the embodiments are referred to each other.

The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. The utility model provides a can realize tensioning wheel of tensile force self-checking, is in including fixed shell body (1) and setting spring (3) in fixed shell body (1), its characterized in that, spring (3) set up fixedly connected with foil gage (2) on the side of the one end of fixed shell body (1), foil gage (2) are connected spring (3) are close to on the side of fixed shell body (1), foil gage (2) are connected with the controller electricity.

2. A tension pulley capable of realizing self-detection of a tension according to claim 1, wherein the strain gauge (2) is a resistance strain gauge (7).

3. A tension pulley capable of realizing self-detection of tension according to claim 1, wherein the strain gauge (2) is adhered or embedded on the side surface of the clockwork spring (3).

4. A tensioner according to claim 1, wherein the controller is electrically connected to an alarm.

5. A tensioner capable of self-detection of tensioning force according to claim 1, characterized in that the controller is an engine ECU.

6. A control system for a tensioning wheel capable of self-detecting a tensioning force, comprising a tensioning wheel capable of self-detecting a tensioning force according to any one of claims 1 to 5, characterized by further comprising a wheatstone bridge, to which said strain gauge (2) is connected, said wheatstone bridge being electrically connected to said controller.

7. The control system for a tensioning wheel capable of realizing self-detection of tensioning force according to claim 6, wherein the strain gauge (2) is a resistance strain gauge (7), the Wheatstone bridge comprises a first parallel branch and a second parallel branch, the first parallel branch is sequentially connected with a first fixed resistor (4) and a second fixed resistor (5) in series, the second parallel branch is sequentially connected with a third fixed resistor (6) and the resistance strain gauge (7) in series, a third line is connected to a rear end of the first fixed resistor (4) and a rear end of the third fixed resistor (6), a voltmeter is connected to the third line, and the voltmeter is electrically connected to the controller.