CN105277160A - Sensor installing base and displacement measuring device using sensor installing base - Google Patents

Abstract

The invention relates to a sensor mounting base and a displacement measuring device using the sensor mounting base. The sensor mounting base includes a base for connecting with a fixed part of a corresponding linear displacement sensor, and a rear end of the base for driving and setting on the linear displacement sensor. For the auxiliary slider between the movable part and the measured piece, the base is provided with a base support surface extending in the up and down direction, and the auxiliary slider is provided with a slider support surface that slides and cooperates with the support surface of the base, and the base support surface is a plane The supporting surface of the slider is an arc surface protruding toward the direction of the supporting surface of the base with the axis extending along the left and right directions, and the supporting surface of the slider is in line contact with the supporting surface of the base. The invention solves the problem in the prior art that the auxiliary sliding block is easy to tilt and the base is deformed.

Description

Sensor mount and displacement measuring device using the sensor mount

technical field

The invention relates to a sensor mounting base and a displacement measuring device using the sensor mounting base.

Background technique

With the rapid development of my country's power grid construction, digital substations have become a hot spot in construction and research, and one of the cores of intelligent digital substations for primary equipment. For the circuit breaker, which is an extremely important power control and protection equipment, the realization of its intelligence is of great significance. With the development and application of sensor technology, the intelligent function of the circuit breaker has been improved and perfected.

The linear displacement sensor can be used to easily read the displacement data of the moving contacts of each phase of the circuit breaker, but for the vacuum circuit breaker, the structure size of the vacuum circuit breaker is relatively small, it is difficult to install the linear displacement sensor in the conventional way, and special sensors are required The mounting base is used to realize the installation of the linear displacement sensor. The existing sensor mounting seat is shown in Figures 1-2: it includes a base 1 and an auxiliary slider 5, the fixed part of the linear displacement sensor 2 is fixed on the base 1, and the auxiliary slider is installed on the movable part of the linear displacement sensor. The base is provided with a base support surface 4 extending in the up and down direction, and the auxiliary slider has a slider support surface 6 that is slidably matched with the base support plane. The base support surface and the slider support surface are both planes. The block is connected with the measured object, that is, the moving contact. When the moving contact moves, the movable part of the linear displacement sensor is driven by the auxiliary slider to move synchronously, so as to realize the measurement of the displacement of the moving contact. Item 3 in the figure represents the connecting rod 3 that realizes the synchronous movement of the auxiliary slider and the moving contact.

The problem with the existing sensor mount is that when the circuit breaker is opening and closing, the movement of the moving contact is a reciprocating motion, and the stress points of the auxiliary slider are different. During the brake process, the force point of the auxiliary slider is on the upper side, and the force point of the auxiliary slider is on the lower side during the opening process of the circuit breaker. The difference in the force point makes the auxiliary slider prone to deflection. The support plane of the block and the support plane of the base are in contact with each other. The inclined auxiliary slider exerts uneven force on the linear displacement sensor and the base. The movable part of the displacement sensor moves synchronously, thereby separating from the measured object, causing displacement measurement distortion, and even hindering the opening and closing action of the circuit breaker, resulting in the circuit breaker not being able to open and close normally.

Contents of the invention

The purpose of the present invention is to provide a sensor mounting base to solve the problem in the prior art that the auxiliary slider is easily tilted and the base is deformed; the purpose of the present invention is also to provide a displacement measuring device using the sensor mounting base.

In order to solve the above problems, the technical solution of the displacement measuring device in the present invention is:

The displacement measurement device includes a linear displacement sensor and a sensor mounting base. The sensor mounting base includes a base connected to the fixed part of the linear displacement sensor. For the auxiliary slider between the measuring parts, the base is provided with a base support surface extending in the up and down direction, and the auxiliary slider is provided with a slider support surface that slides and cooperates with the support surface of the base. The surface is an arc surface protruding toward the direction of the base support surface with the axis extending along the left and right directions, and the slider support surface is in line contact with the base support surface.

The auxiliary slider includes a separate slider body and a connection head of the measured piece, the connection head of the measured piece is provided with a connection structure for the measured piece connected to the measured piece, and the supporting surface of the slider is set on the On the connecting head of the measured part, the slider body is provided with a slideway whose guiding direction extends in the left and right directions, and the connecting head of the measured part guides and moves and is assembled on the slideway.

The auxiliary slider also includes a sensor connection head located on the front side of the slider body, the sensor connection head is provided with a sensor connection structure for connecting with the movable part of the linear displacement sensor, and the front end of the slider body is provided with a notch facing forward. The transmission groove, the sensor connection head is provided with a transmission ball head extending into the transmission groove, and the transmission ball head is rotatably matched with the transmission groove.

The base is provided with a fixed part installation cavity, the cavity wall of the fixed part installation cavity is provided with a process hole, and the connection rubber or connection resin injected through the process hole is provided between the linear displacement sensor and the cavity wall of the fixed part installation cavity.

The technical scheme of sensor mounting seat among the present invention is:

The sensor mounting seat includes a base used to connect with the fixed part of the corresponding linear displacement sensor, and also includes an auxiliary slider located at the rear end of the base for driving and arranged between the movable part of the linear displacement sensor and the measured object. There is a base support surface extending in the up and down direction, and the auxiliary slider is provided with a slider support surface that is slidably matched with the base support surface. The arc surface protrudes in the direction of the support surface, and the support surface of the slider is in line contact with the support surface of the base.

The auxiliary slider includes a separate slider body and a connection head of the measured piece, the connection head of the measured piece is provided with a connection structure for the measured piece connected to the measured piece, and the supporting surface of the slider is set on the On the connecting head of the measured part, the slider body is provided with a slideway whose guiding direction extends in the left and right directions, and the connecting head of the measured part guides and moves and is assembled on the slideway.

The auxiliary slider also includes a sensor connection head located on the front side of the slider body, the sensor connection head is provided with a sensor connection structure for connecting with the movable part of the linear displacement sensor, and the front end of the slider body is provided with a notch facing forward. The transmission groove, the sensor connection head is provided with a transmission ball head extending into the transmission groove, and the transmission ball head is rotatably matched with the transmission groove.

The base is provided with a fixed part installation cavity, and a cavity wall of the fixed part installation cavity is provided with a process hole.

The beneficial effects of the present invention are as follows: in the present invention, the supporting surface of the slider is a circular arc surface extending along the left and right direction with the axis and protruding toward the direction of the supporting surface of the base, and the supporting surface of the slider is in line contact with the supporting surface of the base. When tilted due to unstable force, the arc surface can rotate relative to the support surface of the base to ensure that the support surface of the slider and the support surface of the base are always in line contact. At the same time, the tilting force of the auxiliary slider will not be transmitted to the base, and the base will not be deformed. The service life of the base is guaranteed.

Description of drawings

Fig. 1 is the structural representation of background technology among the present invention;

Fig. 2 is the usage state diagram of Fig. 1;

Fig. 3 is the structural representation of an embodiment of displacement measuring device among the present invention;

Fig. 4 is the top view of Fig. 3;

Fig. 5 is a schematic structural view of the base in Fig. 3;

Fig. 6 is a schematic structural view of the sensor connector in Fig. 3;

Fig. 7 is a schematic structural view of the slider body in Fig. 3;

Fig. 8 is a schematic structural view of the connector of the measured part in Fig. 3;

FIG. 9 is a schematic diagram of cooperation between the sensor connector and the slider body in FIG. 3 .

detailed description

The embodiment of the displacement measurement device is shown in Figures 3 to 9: it includes a linear displacement sensor 6 and a sensor mounting seat, the linear displacement sensor includes a fixed part and a movable part, and the sensor mounting seat includes a base 1 and an auxiliary slider arranged front and rear, and the auxiliary slider It includes a sensor connector 7 , a slider body 8 and a measured piece connector 9 arranged sequentially. The base is provided with a fixed part installation cavity 11, the fixed part of the linear displacement sensor is arranged in the fixed part installation cavity 11, and a process hole 20 is opened on the cavity wall of the fixed part installation cavity. Rubber is injected between the cavity wall of the installation cavity and the fixed part of the linear displacement sensor. When the temperature reaches normal temperature, the rubber forms the connecting rubber 2 for fixing the fixed part in the fixed part installation cavity. At the same time, the connecting rubber can also play a buffer role. The action of force between the fixed part and the base. The sensor connector 7 is provided with a sensor connection structure 12 for connecting with the movable part of the linear displacement sensor. In this embodiment, the sensor connection structure is a pillar structure, and the movable part of the linear displacement sensor can be stuck on the pillar structure. The front end of the slider body is provided with a transmission groove 15 with a notch facing forward, and the sensor connector 7 is provided with a transmission ball head 13 extending into the transmission groove, and the transmission ball head 13 is rotatably matched with the transmission groove 15. The measured piece connection head 9 is provided with a measured piece connecting structure 17 for connecting with the measured piece. In this embodiment, the measured piece is a moving contact, the measuring piece connecting structure is an insertion rod structure, and a guide is provided on the sliding body. The direction is along the slideway 16 extending in the left and right direction, and the connecting head 9 of the measured object is guided and moved on the slideway 16 . The base is provided with a base support surface 10 extending in the up and down direction, and the slider body is provided with a slider support surface 14 that is slidingly matched with the base support surface. The base support surface is a plane, and the slider support surface is an axis extending along the left and right directions. The circular arc surface protrudes toward the direction of the base support surface, and the slider support surface is in line contact with the base support surface.

When in use, place the fixed part of the linear displacement sensor in the fixed part installation cavity, inject rubber between the fixed part and the fixed part installation cavity through the process hole, and the rubber fills the gap between the fixed part installation cavity and the fixed part. When the temperature of the rubber reaches normal temperature, the rubber forms a connecting rubber that realizes the connection between the fixed part and the installation cavity of the fixed part. Press the sensor connecting structure into the sliding piece of the movable part of the linear displacement sensor to ensure that the movable part can move up and down flexibly. The groove wall of the transmission groove is tangent to the transmission ball head to ensure that the sensor connection head and the slider body can rotate relatively , the connecting head of the measured piece can move left and right along the track, but it cannot come out from the track, and connect the connecting head of the measured piece with the moving contact. When the moving contact moves up and down, the moving contact can drive the movable part of the linear displacement sensor to move up and down synchronously through the connecting head of the measured piece, the slider body, and the sensor connecting head. The left and right movement of the head along the slideway prevents the force from being transmitted to the base and the linear displacement sensor. If the connecting head of the measured object deflects, the force is not transmitted to the base through the relative rotation of the slider body and the sensor measuring head. As with linear displacement sensors, if the slider body is inclined due to the position of the force point of the moving contact, the force can also be well blocked by the rotation of the slider support surface relative to the base support surface. Finally, the base and the linear displacement sensor are not damaged by external force, which ensures the service life and measurement accuracy of the entire displacement measuring device.

In other embodiments of the present invention: the connecting head of the measured piece, the slider body and the sensor connecting head can also be integrally arranged; the connecting rubber can also be replaced by connecting resin, of course, the process hole can also be omitted, and at this time, the screw can be used Or the form of interference fit to fix the fixed part on the base; the transmission groove can also be a spherical shape adapted to the transmission ball head; this displacement measurement device can also be applied to other measured parts that need to measure the displacement except the moving contact superior.

The embodiment of the sensor mounting seat is shown in Figures 3-9: the specific structure of the sensor mounting seat is the same as the sensor mounting seat described in the embodiments of the above-mentioned displacement measuring devices, and will not be described in detail here.

Claims (8)

1. Sensor mounting seat, including a base used to connect with the fixed part of the corresponding linear displacement sensor, and also includes an auxiliary slider located at the rear end of the base for driving and arranged between the movable part of the linear displacement sensor and the measured piece, the base There is a base support surface extending along the up and down direction on the top, and a slider support surface that is slidably matched with the base support surface is provided on the auxiliary slider. The base support surface is a plane, and it is characterized in that: The extended arc surface protrudes toward the direction of the base support surface, and the slider support surface is in line contact with the base support surface. 2. The sensor mount according to claim 1, characterized in that: the auxiliary slider includes a separate slider body and a connection head of the measured piece, and the connection head of the measured piece is provided with a The connection structure of the connected measured parts, the supporting surface of the slider is set on the connecting head of the measured part, the slider body is provided with a slideway whose guiding direction extends in the left and right direction, and the connecting head of the measured part is guided to move Assembled on the slide. 3. The sensor mounting seat according to claim 2, characterized in that: the auxiliary slider further includes a sensor connector located on the front side of the slider body, and the sensor connector is provided with a movable part for connecting with a linear displacement sensor. The sensor connection structure, the front end of the slider body is provided with a transmission groove with the notch facing forward, and the sensor connector is provided with a transmission ball extending into the transmission groove, and the transmission ball is rotatably matched with the transmission groove. 4. The sensor mounting base according to any one of claims 1 to 3, characterized in that: the base is provided with a fixed part installation cavity, and the cavity wall of the fixed part installation cavity is provided with a process hole. 5. Displacement measuring device, including a linear displacement sensor and a sensor mounting seat, the sensor mounting seat includes a base connected to the fixed part of the linear displacement sensor, and the sensor mounting seat also includes a movable part located at the rear end of the base for driving and setting on the linear displacement sensor For the auxiliary slider between the measured piece, the base is provided with a base support surface extending in the up and down direction, and the auxiliary slider is provided with a slider support surface that slides and cooperates with the support surface of the base. The feature is that the supporting surface of the slider is an arc surface protruding towards the direction of the supporting surface of the base with the axis extending along the left and right directions, and the supporting surface of the slider is in line contact with the supporting surface of the base. 6. The displacement measuring device according to claim 5, characterized in that: the auxiliary slider includes a separate slider body and a connecting head of the measured piece, the connecting head of the measured piece is provided with a The connection structure of the connected measured parts, the supporting surface of the slider is set on the connecting head of the measured part, the slider body is provided with a slideway whose guiding direction extends in the left and right direction, and the connecting head of the measured part is guided to move Assembled on the slide. 7. The displacement measuring device according to claim 6, characterized in that: the auxiliary slider further includes a sensor connector located on the front side of the slider body, and the sensor connector is provided with a movable part for connecting with a linear displacement sensor. The sensor connection structure, the front end of the slider body is provided with a transmission groove with the notch facing forward, and the sensor connector is provided with a transmission ball extending into the transmission groove, and the transmission ball is rotatably matched with the transmission groove. 8. The displacement measuring device according to any one of claims 5 to 7, characterized in that: the base is provided with a fixed part installation cavity, the cavity wall of the fixed part installation cavity is provided with a process hole, and the linear displacement sensor and the fixed part Connection rubber or connection resin injected through the process hole is provided between the walls of the installation cavity.