CN201724768U - Rope tension detection mechanism with zero adjustment function - Google Patents

Abstract

The utility model discloses a rope tension detection mechanism with zero position adjustment, which converts the tension on the rope into a pressure signal on a pressure sensor through a guide wheel. It includes a guide wheel assembly, a fixed base, a linear bearing, a pressure sensor, a rubber block and a fixed plate. Wherein, the pressure sensor is fixed on the fixed plate at intervals through rubber blocks, and the fixed plate is screwed and installed on the fixed base by screws. The guide wheel assembly is pressed against the top of the pressure sensor through a linear bearing, and the initial pressure of the pressure sensor is adjusted by pressing or loosening the rubber block. The rope required to measure the tension is wound on the outer ring of the guide wheel assembly. When the rope is tightened, the guide wheel assembly is pushed up, thus exerting pressure on the pressure sensor, and the pressure sensor converts the measured pressure into The electrical signal is input into the computer system, and the computer automatically converts the measured signal into the tension value of the rope, and checks whether it is within a given range.

Description

Rope tension detection mechanism with zero adjustment

technical field

The utility model relates to a rope tension detection mechanism, in particular to a rope tension detection mechanism which can adjust the initial tension of the rope and can be used in a rope traction mechanism to conveniently detect the tension of the rope in the dynamic and static process.

Background technique

Since the rope can only exert a pulling force in one direction, there must be redundant force to achieve force closure of the manipulator arm. In order to realize the movement of n degrees of freedom, there must be n+1 cables as driving elements. During the movement of the rope-driven mechanism, the tension of the driving rope must not exceed the maximum tension it can withstand, and must also be greater than the minimum tension required for rope tensioning. Therefore, the tension changes of each rope must be monitored or calculated in real time. In order to automatically detect the tension problem of the rope in the dynamic and static process online and in real time without changing the stress structure of the rope, this patent application proposes a rope tension detection mechanism with a zero position adjustment function.

Contents of the invention

The utility model is a rope tension detection mechanism with a zero position adjustment function, which converts the tension on the rope into a pressure signal on a pressure sensor through a guide wheel. It includes a guide wheel assembly, a fixed base, a linear bearing, a pressure sensor, a rubber block and a fixed plate. Wherein, the pressure sensor is fixed on the fixed plate at intervals through rubber blocks, and the fixed plate is screwed and installed on the fixed base by screws. The guide wheel assembly is pressed against the top of the pressure sensor through a linear bearing, and the initial pressure of the pressure sensor is adjusted by pressing or loosening the rubber block. The rope required to measure the tension is wound on the outer ring of the guide wheel assembly. When the rope is tightened, the guide wheel assembly is pushed up, thus exerting pressure on the pressure sensor, and the pressure sensor converts the measured pressure into The electrical signal is input into the computer system, and the computer automatically converts the measured signal into the tension value of the rope, and checks whether it is within a given range.

The utility model is a rope tension detection mechanism with a zero position adjustment function, which includes a guide wheel assembly 6, a fixed base 4, a linear bearing 5, a pressure sensor 3, a rubber block 2 and a fixed plate 1; wherein the fixed plate 1 is screwed on the fixed base 4 by A fixing screw 101, the pressure sensor 3 is screwed on the fixing plate 1 by C fixing screw 103, the rubber block 2 is clamped between the fixing plate 1 and the pressure sensor 3, and the B fixing screw 102 is screwed on the fixing plate 1 On the plate 1, through the central hole 21 of the rubber block 2, it is pressed against the pressure sensor 3;

The linear bearing 5 is fixed on the transverse support plate 41 of the fixed base 4 through D fixing screws 104, the pressure shaft 301 can slide in the middle of the linear bearing 5, and one end of the pressure shaft 301 is against the force-measuring end of the pressure sensor 3, and the pressure shaft 301 The other end of the A nut is fixed on the guide wheel fixing table 601 by the A nut 302;

The guide wheel rotating shaft 607 passes through the A through hole 611 of the guide wheel fixed platform 601, the flow bearing 606, the sleeve 603, the B through hole 612 of the guide wheel fixed platform 601, and is tightened with the B nut 602;

The rolling bearing 606 is installed in the guide wheel 605, and the inner ring of the rolling bearing 606 is supported by the sleeve 603, the collar 604 is stuck on the guide wheel 605, and simultaneously presses the outer ring of the rolling bearing 606; the rope 7 required for measuring the tension is wound on In the U-shaped groove 605A of the guide wheel 605.

The utility model has the advantages of the rope tension detection mechanism with zero position adjustment function:

(1) By adjusting the gap between the pressure sensor and the upper end surface of the pressure shaft, the tension detection mechanism has a zero adjustment function.

(2) The threaded section of the pressure shaft is fixedly connected with 601, and the rope is wound on the guide wheel. When the rope is tensioned, the tension is converted into the pressure on the pressure sensor, which can detect the tension of the rope in dynamic and static states in real time.

(3) Set a rubber block between the fixed plate and the pressure sensor, and squeeze the rubber block by adjusting 103 to adjust the gap between the pressure sensor and the upper end surface of the pressure shaft.

(4) There is no need to change the rope structure, and the tension of the rope can be detected only by winding it on the guide wheel.

(5) The detection mechanism is small in size and easy to install and disassemble.

Description of drawings

Fig. 1 is a structural diagram of a rope tension detection mechanism with a zero position adjustment function of the present invention.

Fig. 2 is an exploded view of the rope tension detection mechanism with zero position adjustment function of the present invention.

Detailed ways

The utility model will be described in further detail below in conjunction with the accompanying drawings.

Referring to Fig. 1, the utility model is a rope tension detection mechanism with a zero adjustment function, which includes a guide wheel assembly 6, a fixed base 4, a linear bearing 5, a pressure sensor 3, a rubber block 2 and a fixed plate 1. Among them, the fixed plate 1 is screwed on the fixed base 4 by the A fixed screw 101, the pressure sensor 3 is screwed on the fixed plate 1 by the C fixed screw 103, the rubber block 2 is sandwiched between the fixed plate 1 and the pressure sensor 3, and the B fixed screw 102 is screwed on the fixed plate 1, and pushes against the pressure sensor 3 through the central hole 21 of the rubber block 2;

The linear bearing 5 is fixed on the transverse support plate 41 of the fixed base 4 through D fixing screws 104, the pressure shaft 301 can slide in the middle of the linear bearing 5, and one end of the pressure shaft 301 is against the force-measuring end of the pressure sensor 3, and the pressure shaft 301 The other end of the A nut is fixed on the guide wheel fixing table 601 by the A nut 302;

The guide wheel rotating shaft 607 passes through the A through hole 611 of the guide wheel fixed platform 601, the flow bearing 606, the sleeve 603, the B through hole 612 of the guide wheel fixed platform 601, and is tightened with the B nut 602;

The rolling bearing 606 is installed in the guide wheel 605, and the inner ring of the rolling bearing 606 is supported by the sleeve 603, and the collar 604 is stuck on the guiding wheel 605, and simultaneously presses the outer ring of the rolling bearing 606. The rope 7 required to measure the tension is wound in the U-shaped groove 605A of the guide wheel 605 .

The fixed base 4 is designed into an H configuration, and a linear bearing 5 is installed on the transverse support plate 41

The guide wheel fixing table 601 is designed into a U configuration. One arm of the guide wheel fixing table 601 is provided with an A through hole 611, and the other arm is provided with a B through hole 612. The top of the guide wheel fixing table 601 is used for connecting Pressure axis 301 . In the present invention, the A through hole 611 and the B through hole 612 allow the guide wheel rotation shaft 607 to pass through, and realize the installation of the guide wheel rotation shaft 607 and the guide wheel fixing platform 601 .

(1) Adjust the initial tension zero position adjustment of the pressure force sensor

Referring to Fig. 1 and Fig. 2, first loosen the B fixing screw 102, and adjust the C fixing screw 103 to make the pressure sensor 3 squeeze the rubber block 2, thereby changing the gap between the pressure shaft 301 and the force measuring end of the pressure sensor 3 (0.1mm ~10mm), so as to change the initial pressure of the pressure axis 301 on the pressure sensor 3, and observe the value detected by the pressure sensor 3 from the computer. When the value is 0, it means that the mechanism has returned to zero. At this time, tighten the B fixing screw 102 again to fix the pressure sensor 3 . VC software (version number Microsoft Visua1C++2005) is used in the PC to write the powerful information acquisition program. The purpose of this software is to display the force information output by the pressure sensor in real time. The pressure sensor 3 can be directly connected to the PC through the serial interface, or can be connected between the pressure sensor 3 and the PC through a data acquisition card, and the data acquisition card is installed in the motherboard slot of the PC.

(2) Detect the tension of the rope

Referring to Fig. 1 and Fig. 2, the rope 7 is wound on the U-shaped groove 605A of the guide wheel 605. When the rope 7 is tensioned, pressure is generated on the guide wheel 605, and the pressure sensor 3 is pressed through the pressure shaft 301, and the pressure sensor 3. Convert the measured pressure into an electrical signal, input it into the PC, and display the pressure value on the display screen of the PC. There is rolling friction between the pressure shaft 301 and the linear bearing 5, so the friction force generated by it is ignored, and the value measured by the pressure sensor 3 is the pressure of the rope 7 on the guide wheel 605. When the rope 7 and the dynamometer form a When arranged at an angle of 90 degrees, the pressure measured at this time is the tension of the rope 7 itself. When the rope 7 is relatively slipped due to traction, the guide wheel 605 rotates around the guide wheel rotation shaft 607 through the rolling bearing 606, and the sliding friction between the rope and the guide wheel is converted into negligible rolling friction, thereby accurately measuring the dynamic state of the rope. tension value.

During the movement of the motor output shaft, the pulling force is transmitted to the motion platform through the rope, thereby driving the motion platform to rotate; the output force of the motor can be output to the amplifier through the pressure sensor in the tension detection mechanism of the utility model. Then it can be displayed on the PC. This is a certain application form of the tension detection mechanism designed by the utility model, and this application form cannot be used as limiting the scope of use of the utility model.

Claims (2)

1. A rope tension detection mechanism with zero position adjustment, characterized in that it includes a guide wheel assembly (6), a fixed base (4), a linear bearing (5), a pressure sensor (3), a rubber block (2 ) and the fixed plate (1); wherein, the fixed plate (1) is screwed on the fixed base (4) by the A fixed screw (101), and the pressure sensor (3) is screwed on the fixed plate (1) by the C fixed screw (103) ), the rubber block (2) is sandwiched between the fixed plate (1) and the pressure sensor (3), the B fixing screw (102) is tightened on the fixed plate (1), and passes through the center hole (21) of the rubber block (2) Push on the pressure sensor (3); The linear bearing (5) is fixed on the transverse support plate (41) of the fixed base (4) through the D fixing screw (104), the pressure shaft (301) can slide in the middle of the linear bearing (5), and the pressure shaft (301) One end bears on the force measuring end of the pressure sensor (3), and the other end of the pressure shaft (301) is fixed on the guide wheel fixing table (601) by the A nut (302); The guide wheel rotating shaft (607) passes through the A through hole (611), the flow bearing (606), the sleeve (603), the B through hole ( 612) and tighten with the B nut (602); The rolling bearing (606) is installed in the guide wheel (605), and the inner ring of the rolling bearing (606) is supported by the sleeve (603). ) outer ring; the rope (7) required to measure the tension is wound in the U-shaped groove (605A) of the guide wheel (605). 2. The rope tension detection mechanism with zero position adjustment according to claim 1, characterized in that: the guide wheel assembly (6) pushes against the top of the pressure sensor (3) through a linear bearing (5), and is pressed or loosened Open the rubber block (2) to adjust the initial pressure of the pressure sensor. the

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