RU2299441C2 - Device for fastening velocity pickup - Google Patents

Abstract

FIELD: measuring technique.

SUBSTANCE: device comprises tubular housing provided with outer projection that engages the base and spring whose one end abuts against the bottom of the tubular housing and the other end presses the pickup to the cantilever via the connecting member that keeps the end part in the opening of the cantilever secured to the base so that the end part of the pickup is mounted with a spaced relation to the gear wheel that can rotate. The fastening member is made of a nut provided with openings.

EFFECT: enhanced reliability and simplified adjusting and assembling.

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Description

The invention relates to the field of determining and controlling vehicle speed.

A device for mounting a sensing element in electric locomotive engines is known, comprising a housing with a bracket and a gear wheel, which is located at a certain distance from the sensing element to generate an electrical signal, which is a function of rotational speed. The fastening of the sensitive element in the hole of the bracket is performed using a compound with a filler (drawing 6TC.367.899СБ, type of sensor HAD-18mg.82b1-5GT1).

Such fastening of the sensitive element has limited functionality - the lack of "flexibility" in the configuration and in the process of detecting errors after assembly of all engine components and trial run. To eliminate the error of the sensor using additional devices and nodes.

The closest in technical essence is a device for mounting a speed sensor containing a tubular body having an internal protrusion. A spring is located in the housing, one end of which is attached to the inner protrusion. Connected to the second end of the spring is one end portion of the sleeve that can slide inside the housing. A sensor is installed at the second end of the sleeve, which senses the rotational movement of a certain element and generates an electrical signal, which is a function of the speed of rotation of the element. An arm protruding from the housing is mounted next to the rotating member. The bracket has an opening through which the end portion of the sensor passes so that the sensor occupies a certain fixed position at a certain distance from the rotating element. The housing is located next to the bracket in such a way that the second end part of the housing to which the sensor is mounted is engaged with the bracket and compresses the spring. A special device prevents the rotational movement of the sleeve, US patent No. 4511840, IPC 3 G01P 3/42.

Such a device for attaching a speed sensor allows tuning during the commissioning and experimental engine starts by changing the length of the sleeve, the compression force of the spring without the use of additional devices and components. But at maximum engine speeds as a result of shaking and a slight vibration of the body, the sensor has false alarms. This is due to the sequential chain of elements: sensor - sleeve - spring - housing and a special device that prevents the rotational movement of the sleeve. At maximum engine speeds, when vibration is transmitted to the tubular body of the speed sensor mounting device, it is compensated by the operation of the spring, which presses the sensor through the sleeve to the bracket, preventing it from vibrating, and is in a fixed state. A special device that prevents the rotational movement of the sleeve, at some point in time, fixes it in place inside the housing during vibration of the engine during its rotation at maximum speed, i.e. there is an imposition of the force holding the sleeve from rotation, and the efforts of moving the sleeve inside the housing towards the spring from vibration, which compensates for the force of the spring on the sleeve. This loosens the sensor against the bracket and causes the sensor to jerk. As a result, some of the electrical signals are lost, and the engine speed is measured erroneously.

The objective of the invention is to ensure reliable operation of the sensor and the simplicity of its configuration during assembly, commissioning and during the experimental start of the engine.

The problem is solved in that in the fastening device of the speed sensor, containing a tubular body having an outer protrusion, which is hooked to the base and spring, abutting at one end to the bottom of the tubular body, and the other end presses the sensor to the bracket through the connection element holding the end of the sensor in the hole of the bracket, fixed on the base so that the end part of the sensor is installed with a gap with respect to the gear wheel, which can be rotated, the differences are introduced: connection element made in the form of a nut with holes for the slot screwed onto the end of the sensor, and the holes for the slot in the nut are located around the perimeter at different distances from the center of the nut.

The proposed device for fastening the speed sensor due to the direct pressing of the sensor to the bracket by the spring through the connection element does not allow it to weaken during jolting and vibration of the engine at maximum speed and thereby produce false electrical signals, the slot does not allow the sensor to move along the bracket in the horizontal direction, while the main advantage of the prototype is preserved - the use of a spring.

Figure 1 shows the mounting device of the speed sensor Assembly.

Figure 2 shows a nut with holes for the slot, which is screwed onto the end of the sensor and presses it to the bracket using a spring.

A speed sensor attachment device comprising a tubular body 1 having an outer protrusion 2 that engages in a base 3 and a spring 4, abutting at one end of the bottom of the tubular body 1, and at the other end presses the sensor 5 to the bracket 6 through the connecting element 7 holding the end part the sensor 8 in the hole of the bracket 6, mounted on the base 3 so that the end part of the sensor 8 is installed with a gap 9 in relation to the gear wheel 10, which can be rotated, and the connection element 7 is made in the form of a nut with holes 11 under the slot 12, wound on the end of the sensor 8, and the holes 11 under the slot 12 in the nut 7 are located around the perimeter at different distances from the center of the nut.

To adjust the gap 9 from the end of the sensor 8 to the rotating element 10, it is necessary to turn the nut 7 in the required direction, which is necessary to bring the sensor 5 closer or to remove it from the rotating element 10. To adjust the position of the end of the sensor 8 with respect to the rotating element 10, horizontally, it is necessary to select a hole 11 on the nut 7 under the slot 12 so that it corresponds to the position of the end part of the sensor 8 relative to the rotating element 10 horizontally, because the holes 11 on the nut 7 are located at different distances from the center of the nut 7.

The introduction of new features into the fastening device of the speed sensor allows for easy adjustment of the sensor and the reliability of its operation during jolting and vibration of the engine at maximum speed and in normal operation.

Claims (1)

A speed sensor attachment device comprising a tubular body having an outer protrusion that engages in a base and a spring abutting against one end of the bottom of the tubular body, and at the other end presses the sensor to the bracket through a connection element holding the end of the sensor in the hole of the bracket fixed to the base so that the end part of the sensor is installed with a gap in relation to the gear wheel having the possibility of rotation, characterized in that the connection element is made in the form of a nut with holes and under the slot, screwed onto the end of the sensor, and the holes for the slot in the nut are located around the perimeter at different distances from the center of the nut.

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