RU57891U1 - DEVICE FOR MEASURING LINEAR MOVEMENT OF A CRANE OR ITS UNITS - Google Patents

Abstract

A device is proposed for measuring the linear displacement of a crane or its assemblies with at least one finger mounted on a wheel and fixed against the wheel at a control point by a finger recorder passing a control point where an asterisk interacting with a finger is fixed. The sprocket rotates and rotates a reversible potentiometric shaft angle sensor, changing its resistance. The change in resistance determines the number of finger passes past the control point, the distance traveled and the direction of movement of the crane. The technical result from the use of the utility model is that the operation of this device is practically independent of the ingress of dirt onto the crane truck, the accuracy of measuring the movement of the crane increases, guaranteed interaction of the sprocket with a finger is ensured, and the device cannot jam. 5 cp f-ly, 5 ill.

Description

FIELD OF TECHNOLOGY

The utility model relates to measuring equipment and can be used in devices for measuring the path of movement of a crane or units of hoisting machines, as well as in any other equipment where movement measurement is required, for example, in crane trucks.

BACKGROUND OF THE INVENTION

A device is known for measuring the travel path of a crane, comprising a recording unit connected via a motion transmission mechanism to a wheel moving along a crane path (see USSR author's certificate No. 1017926, G 01 C 22/00, B 66 C 22/00, 05/15/1983) . In the known device, the motion transmission mechanism is made in the form of a swinging lever connected at one end to an eccentric mounted on the wheel shaft, and on the other end of the lever there is a pusher interacting with the leash of the recording device. This device cannot be mounted on the crane wheel and the installation of an additional wheel is required. In addition, the device registers movement, but does not distinguish between directions of movement and information about the direction of movement can be obtained only from another sensor or from an observer.

The closest to the claimed utility model in terms of the essential features is a device for measuring the movement of the traction carriage, comprising a recording unit connected via a movement transmission mechanism to a wheel moving along the path (see USSR author's certificate No. 1483262, G 01 C 22/00, 30.05. 1989). In this

the device, the motion transmission mechanism is made in the form of a gear disk fixed to a shaft of a wheel and a spring-loaded lever with a roller interacting with a gear wheel. The movement recorder includes two reed switches (magnetically controlled contacts), each of which interacts with a spring-loaded lever, when the next tooth of the disk interacts with the roller. The device provides direct registration of the forward and reverse movement of the traction carriage, but like the previous device, it requires substantial refinement of the crane trolley in order to fix the toothed disk and reed switch. In addition, the reed switches are not protected from dirt, and the use of the device at the construction site, where it is possible to get various dirt, snow or ice on the crane trolley, which can cause malfunctions of the recording device.

DISCLOSURE OF A USEFUL MODEL

The problem to which the present utility model is aimed is to create a device for measuring the magnitude of the movement of the crane or its units, capable of recording forward and reverse movements of the crane, the use of which does not require significant refinement of the crane truck, and which will be little sensitive to getting on the crane truck various pollution.

The stated technical tasks are achieved as follows. In a device for measuring the linear displacement of a crane or its assemblies, comprising a recording unit connected via a movement transmission mechanism to a wheel moving along a crane path, according to a utility model, the movement transmission mechanism is equipped with at least one finger fixed to the wheel, and the recording unit equipped with a recorder for passing the finger past the control point, fixed opposite the wheel at the control point, including a counter for the number of finger passes past the control point and that is fixed to the shaft

an asterisk interacting with the finger as the latter passes the control point, and a reversible potentiometric shaft angle sensor attached to the shaft, the output of which is connected to the potentiometric sensor reading unit.

It is preferable that several fingers are fixed to the wheel, evenly spaced around a circumference coaxial with the axis of rotation of the wheel.

Preferably, the sprocket is made with at least four evenly spaced radial rays intersecting the trajectory of the fingers.

Preferably, the radial rays are made with pointed ends.

It is preferable that the pointed ends of the radial rays of the sprocket are made elastic, and the pointed end of each radial ray of the sprocket is made with thin outer walls providing elasticity to the pointed end.

ESSENCE OF A USEFUL MODEL

The proposed device is based on a discrete displacement measurement scheme, when with each interaction of the finger with the sprocket beam, the sprocket rotates a certain angle and with it a reversible potentiometric shaft rotation angle sensor rotates, changing its resistance by a certain amount. The change in resistance is processed in the reading processing unit, where the change in resistance is summed up and converted into linear movement of the crane. When moving in the opposite direction, the sprocket also starts to rotate in the opposite direction, which is detected by a reversible potentiometric shaft angle sensor, and, accordingly, the reading processing unit starts the countdown of the crane movement. The device does not require significant refinement of the crane

trolleys, it’s enough to weld a finger on the wheel end at a given radius. The potentiometric sensor can be mounted using an ordinary bracket. Considering that the force applied to the sprocket from the side of the finger is limited only by the strength of the sprocket beam, the operation of this device is practically independent of the pollution getting onto the crane truck.

The presence of several fingers reduce the step of discrete measurement of displacement, which increases the accuracy of measuring the movement of the crane.

The presence of the sprocket, at least four evenly spaced radial rays, ensures guaranteed interaction of the sprocket with a finger.

The implementation of radial rays with pointed ends and the execution of the pointed ends of each radial ray of an asterisk with thin outer walls eliminates the possibility of jamming of the device.

BRIEF DESCRIPTION OF THE DRAWINGS

Figure 1 shows a General view of a device for measuring the magnitude of the displacement of the crane mounted on the wheel of the crane; figure 2 shows a block diagram of a device for measuring the magnitude of the movement of the crane; figure 3 shows a section aa in figure 1; figure 4 shows a diagram of a device with three fingers mounted on a wheel of a crane and figure 5 shows a diagram of a device with two fingers fixed on a wheel of a crane.

EXAMPLE OF IMPLEMENTATION OF A USEFUL MODEL

As shown in figure 1, the crane truck 1 has a wheel 2 and a pin 3 mounted on the wheel 2. Wheel 2 is mounted for movement on the crane track 4. A device for measuring the linear displacement of the crane is mounted on an arm 5 mounted, for example, on a crane cart 1 and contains a recording unit 6.

Figure 2 shows a block diagram of a device for measuring the magnitude of the movement of the crane. The recording unit 6 is equipped with a registrar 7 for passing a finger past a control point, including a marker 8 for the number of finger passes past a control point, on the shaft 9 of which an asterisk 10 is fixed (Fig. 2 is conventionally shown rotated by 45 °). A reversible potentiometric sensor 11 of the angle of rotation of the shaft is connected to the shaft 9, the output of which is connected to the input of the potentiometric sensor reading unit 12. The potentiometric sensor reading processing unit 12 comprises an analog-to-digital converter (ADC) 13, a digital computing unit 14 and a visual indication unit 15, which can be placed, for example, in a crane cabin.

As shown in FIG. 3, the sprocket 10 is mounted on the shaft 9 of the finger 8 marker passing the control point and preferably has several (at least four) evenly spaced radial beams 16, preferably with pointed ends 17. The pointed ends 17 of each radial beam 16 sprockets 10 are preferably made with thin outer walls 18. Radial rays 16 of sprocket 10 intersect the trajectory of the finger 3.

As shown in FIG. 4, three fingers 3 are fixed on the wheel 2, evenly spaced around a circle coaxial with the axis of rotation of the wheel, interacting with an asterisk 10 of the recorder 7 of the finger passing past the control point. Although three fingers are shown in this embodiment of the utility model, it should be understood that the number of fingers 3 can be any.

As shown in FIG. 5, two fingers are fixed on the wheel, evenly spaced around a circle coaxial with the axis of rotation of the wheel, interacting with an asterisk 10 of the recorder 7 of the finger passing past the control point.

The device operates as follows

When the crane truck 1 moves along the crane path 4, the finger 3 fixed on the wheel 2 rotates with the wheel, passes the control point at which the marker 8 for the number of finger passes past the control point, and interacts with the radial rays 16 of the asterisk 10 of the marker 8 of the number of passes finger past the control point. When moving the finger 3, it presses on the side surface of the radial beam 16 and rotates the sprocket 10 by a certain angle in a certain direction, and also rotates the shaft 9, connected with the reversible potentiometric sensor 11 of the angle of rotation of the shaft. The resistance of the reversible potentiometric sensor 11 of the angle of rotation of the shaft changes by a certain amount, which leads to a change in the signal at the output of the reversible potentiometric sensor 11 of the angle of rotation of the shaft. From the registrar 7, the signal of the reversible potentiometric sensor 11 of the angle of rotation of the shaft is fed to the input of the potentiometric sensor reading unit 12, in which, using an analog-to-digital converter (ADC) 13 and a digital computing unit 14, it is converted to the value of the crane movement, which can be displayed on the panel control of the crane by the visual indication unit 15, as well as information on the amount of movement of the crane can be stored in any registration device and used by the device in the system ensure the safety of the crane. Using a reversible potentiometric sensor 11 of the angle of rotation of the shaft allows you to register the movement of the crane truck 1 both in the forward and in the opposite direction, and the use of several fingers 3, evenly spaced around the circumference, coaxial with the axis of rotation of the wheel 2, increases the accuracy of measuring the magnitude of the movement of the crane.

The presence of elastic pointed ends 17 on the radial rays 16 of the sprocket 10 eliminates the possibility of jamming and damage to the device, so

as at the risk of jamming, the pointed end of the beam is elastically deformed and moves with finger 3, leaving the jamming position.

Given that in one rotation of the wheel 2, the crane moves a certain distance equal to the circumference of the outer diameter of the wheel, the presence of even one finger 3 allows you to control the movement of the crane.

The inventive utility model can be manufactured industrially using known materials and technologies. As a potentiometric sensor, SP5-21A manufactured by the Arzamas Radio Plant can be used. When implementing the utility model, various design versions of the device can be used to measure the linear displacement of the crane. The specialist in this field it is clear that there may be various modifications of the proposed device without departing from the spirit and scope of the present utility model, determined by the scope of the claims set forth in the utility model formula.

Claims (6)

1. A device for measuring the linear displacement of a crane or its assemblies, comprising a recording unit connected via a movement transmission mechanism to a wheel moving along a crane path, characterized in that the movement transmission mechanism is equipped with at least one finger fixed to the wheel, and the recording unit is equipped with a finger passage past the control point fixed in front of the wheel at the control point, including a marker of the number of finger passes past the control point, on the shaft of which there is a sprocket fixed, which interacts with the finger when the latter passes the control point, and a reversible potentiometric sensor of the angle of rotation of the shaft connected to the shaft, and a potentiometric sensor for processing the readings, whose input is connected to the output of the reversible potentiometric sensor of the angle of rotation of the shaft. 2. The device according to claim 1, characterized in that several fingers are fixed on the wheel, evenly spaced around a circumference coaxial with the axis of rotation of the wheel. 3. The device according to claim 2, characterized in that the sprocket is made with at least four evenly spaced radial rays intersecting the trajectory of the fingers. 4. The device according to claim 3, characterized in that the radial rays are made with pointed ends. 5. The device according to claim 4, characterized in that the pointed ends of the radial rays of the sprocket are made elastic. 6. The device according to claim 5, characterized in that the pointed end of each radial ray of the sprocket is made with thin outer walls that provide elasticity to the pointed end.