CN211128839U

CN211128839U - Connecting and shielding assembly and displacement sensor

Info

Publication number: CN211128839U
Application number: CN201921451005.0U
Authority: CN
Inventors: 袁庆国; 钟金云
Original assignee: Measurement Specialties China Ltd
Current assignee: Measurement Specialties China Ltd
Priority date: 2019-08-30
Filing date: 2019-08-30
Publication date: 2020-07-28
Anticipated expiration: 2029-08-30

Abstract

The utility model provides a connecting and shielding assembly for connecting a sensor, which comprises a connecting sleeve and a shielding layer, wherein the connecting sleeve is provided with a side wall which is enclosed into an accommodating cavity for accommodating a coil assembly, and two ends of the connecting sleeve are respectively provided with an opening communicated with the accommodating cavity; the shielding layer is arranged on the side wall of the connecting sleeve and is connected with the side wall into an integral piece; the utility model also provides a displacement sensor; the utility model provides a connect and shielding subassembly, through be provided with the shielding layer at adapter sleeve, install coil pack in the holding chamber, improved sensor magnetic screen effect, simplified production process, improved production efficiency.

Description

Connecting and shielding assembly and displacement sensor

Technical Field

The utility model belongs to the technical field of the sensor, more specifically say, relate to a connect and shield assembly and displacement sensor.

Background

The shield body is treated like inductance type displacement sensor to traditional, mostly through addding the shield plate structure in the inside of casing in order to improve sensor magnetic screen effect, addd the shield plate structure inside the casing and curled into tubular product form by the high magnetic permeability alloy board of certain thickness (like 0.01 inch), adopt high magnetic permeability alloy board though can improve product magnetic screen effect, but because this shield plate structure is curled by panel and forms, the joint part can have the breach, lead to the shield plate structure discontinuous, influence shielding effect. The shielding plate structure must be made into a thin plate, if the shielding plate structure is thick, on one hand, the shielding plate structure and the inner wall of the shell are difficult to perfectly fit, on the other hand, too much internal space is occupied, the accommodating space of other components is influenced, and a material with good ductility is preferably selected so as to be made into the thin plate; meanwhile, the shielding plate structure needs to be cut according to the size of the shell and then is plugged into the shell, so that the installation procedure is increased, the fixing is difficult, and the production efficiency is low.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a connect and shielding subassembly to solve the shielding plate structure discontinuity that exists among the prior art in treating the shielding body, influence the technical problem of shielding effect.

In order to achieve the above object, the utility model adopts the following technical scheme: providing a connecting and shielding assembly for connecting a sensor, wherein the connecting and shielding assembly comprises a connecting sleeve and a shielding layer, the connecting sleeve is provided with a side wall, the side wall is enclosed into an accommodating cavity for accommodating a coil assembly, and two ends of the connecting sleeve are respectively provided with an opening communicated with the accommodating cavity; the shielding layer is arranged on the side wall of the connecting sleeve and is connected with the side wall into a whole.

Further, the shielding layer is arranged on the outer surface of the side wall of the connecting sleeve and is connected with the side wall into a whole.

Further, the shielding layer is arranged on the inner surface of the side wall of the connecting sleeve and is connected with the side wall into a whole.

Further, the shielding layer is disposed on an outer surface of the side wall and an inner surface of the side wall of the connection sleeve, and is connected to the side wall in one piece.

Furthermore, the connecting and shielding assembly further comprises a cover plate fixedly connected with the connecting sleeve, and the surface of the end part of the connecting sleeve is provided with an installation groove which is arranged around the periphery of the accommodating cavity and used for placing the cover plate.

Further, the cover plate is provided with a through hole through which the coil assembly passes and extends beyond the end of the connecting sleeve.

Further, the shielding layers have the same radial thickness.

Further, the connecting sleeve is a stainless steel pipe.

Further, the shielding layer extends continuously in the circumferential direction of the connecting sleeve.

Further, the shielding layer and the side wall are arranged in a gapless contact manner in the radial direction of the connecting sleeve.

Further, the shielding layer is a soft magnetic alloy layer.

Further, the shielding layer is a permalloy layer.

Further, the shielding layer is an electroplated layer disposed on the connecting sleeve.

The utility model also provides a displacement sensor, which comprises a coil component and the connecting and shielding component; the coil assembly comprises a coil body extending along the axial direction of the connecting sleeve and an external connection portion connected with the coil body, and the end portion of the external connection portion extends to the outside of the end portion of the connecting sleeve and is electrically connected with the sensor.

Further, the coil body includes a first coil end portion and a second coil end portion, and the external connection portion is located at the second coil end portion.

Furthermore, the end surface of the connecting sleeve is provided with an annular groove surrounding the periphery of the accommodating cavity, and the coil body is positioned at the first coil end part and is provided with a convex part surrounding the periphery of the first coil end part and clamped with the annular groove.

Further, the displacement sensor further comprises a shielding plate, and the shielding plate is attached to the inner surface of the side wall of the connecting sleeve.

Further, the displacement sensor is a linear variable differential transformer.

The utility model provides a connection and shielding subassembly's beneficial effect lies in: compared with the prior art, the utility model discloses connect and shielding subassembly includes connecting sleeve and shielding layer, and connecting sleeve has the holding chamber that supplies the coil pack to put into simultaneously, is formed with the opening that communicates with the holding chamber on two tip of connecting sleeve respectively for the coil pack parcel is in the connecting sleeve who is provided with the shielding layer, and extends to the holding chamber outside through coil pack's external portion and sensor electric connection, has improved sensor magnetic shield effect, has simplified production processes, has improved production efficiency.

The displacement sensor with the connecting and shielding assembly has good magnetic shielding effect.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for the embodiments or the prior art descriptions will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings without inventive labor.

Fig. 1 is an exploded view of a connection and shielding assembly according to an embodiment of the present invention;

fig. 2 is a schematic perspective view of a connection sleeve according to an embodiment of the present invention;

fig. 3 is a schematic cross-sectional view of a connection sleeve along the line a-a in the figure according to an embodiment of the present invention.

Wherein, in the figures, the respective reference numerals:

1: connection and shielding assembly 11: connecting sleeve

111: side wall 112: containing cavity

113: annular groove 12: shielding layer

2: the coil block 21: coil body

211: first coil end 212: end of the second coil

22: external connection portion 23: raised portion

Detailed Description

In order to make the technical problem, technical solution and advantageous effects to be solved by the present invention more clearly understood, the following description is given in conjunction with the accompanying drawings and embodiments to illustrate the present invention in further detail. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

It will be understood that when an element is referred to as being "secured to" or "disposed on" another element, it can be directly on the other element or be indirectly on the other element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or be indirectly connected to the other element.

It will be understood that the terms "length," "width," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like are used in an orientation or positional relationship indicated in the drawings for convenience in describing the invention and to simplify the description, and are not intended to indicate or imply that the device or element so referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus should not be construed as limiting the invention.

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 invention, "a plurality" means two or more unless specifically limited otherwise.

Referring to fig. 1 to fig. 3, a connection and shielding assembly 1 for connecting a sensor according to the present embodiment includes a connection sleeve 11 and a shielding layer 12, the connection sleeve 11 has a side wall 111, the side wall 111 encloses an accommodating cavity 112 for accommodating a coil assembly 2, and two ends of the connection sleeve 11 are respectively formed with openings communicated with the accommodating cavity 112; the shielding layer 12 is arranged on the side wall 111 of the connecting sleeve 11 and is connected in one piece with the side wall 111.

Foretell connect and shielding component 1 includes connecting sleeve 11 and shielding layer 12, connecting sleeve 11 has the holding chamber 112 that supplies coil pack 2 to put into simultaneously, be formed with the opening with holding chamber 112 intercommunication on two tip of connecting sleeve 11 respectively, make coil pack 2 parcel in the connecting sleeve 11 that is provided with shielding layer 12, and extend to holding chamber 112 outer with sensor electric connection through coil pack 2's external portion 22, sensor magnetic shield effect has been improved, production processes has been simplified, and production efficiency is improved.

Referring to fig. 1 to fig. 3 together, as a specific implementation manner of the connection and shielding assembly 1 provided in this embodiment, the connection and shielding assembly 1 is fixedly connected to a device to be tested, the connection and shielding assembly 1 includes a connection sleeve 11 and a shielding layer 12, the connection and shielding assembly 1 provided with the shielding layer 12 is inserted into a sensor, the connection sleeve 11 has an accommodating cavity 112 for accommodating the coil assembly 2, and two end portions of the connection sleeve 11 are respectively formed with openings communicated with the accommodating cavity 112; the connection and shielding assembly 1 provided with the continuous shielding layer 12 structure extends inside the coil, preventing the coil magnetic field in the displacement sensor from influencing the normal operation of the coil assembly 2 located inside the connection sleeve 11.

Further, the shielding layer 12 is provided on the side wall 111 of the connecting sleeve 11 and is connected to the side wall 111 in one piece. Further, the shielding layer 12 is disposed on the outer surface of the side wall 111 of the connecting sleeve 11 and is connected with the side wall 111 in a single piece; or, the shielding layer 12 is arranged on the inner surface of the side wall 111 of the connecting sleeve 11 and is connected with the side wall 111 into a whole piece; alternatively, the shield layer 12 is disposed on the outer surface of the side wall 111 and the inner surface of the side wall 111 of the connecting sleeve 11, and is connected to the side wall 111 in one piece. Preferably, the shielding layer 12 is disposed on the inner surface of the side wall 111 of the connecting sleeve 11 and is connected with the side wall 111 into a whole, so as to prevent the shielding layer 12 from being worn due to friction between the connecting sleeve 11 and other members, which is disposed on the outer surface of the connecting sleeve 11, and the shielding layer 12 is discontinuous, thereby affecting the magnetic shielding effect of the connecting sleeve 11; if the shielding layer 12 is disposed on both the outer surface of the sidewall 111 of the connecting sleeve 11 and the inner surface of the sidewall 111, the shielding layer 12 disposed on the outer surface of the sidewall 111 is abraded due to the friction between the connecting sleeve 11 and other members, which results in the discontinuity of the shielding layer 12 and affects the magnetic shielding effect of the connecting sleeve 11, therefore, the shielding layer 12 is disposed on the inner surface of the sidewall 111 of the connecting sleeve 11 and is connected with the sidewall 111 to form a whole, which optimizes the shielding effect of the connecting and shielding assembly 1, simplifies the process and saves the production cost.

Further, the connecting and shielding assembly 1 further comprises a cover plate fixedly connected with the connecting sleeve 11, and the surface of the end part of the connecting sleeve 11 is provided with an installation groove which surrounds the periphery of the accommodating cavity 112 and is used for placing the cover plate; the cover plate is placed in the mounting groove to encapsulate the accommodating cavity 112. Preferably, the cover plate is provided with a through hole for the coil assembly 2 to pass through and extend beyond the end of the connecting sleeve 11, so that the coil assembly 2 is connected with the sensor. Further, the shielding layer 12 is disposed on the surface of the cover plate facing the accommodating cavity 112, so as to effectively improve the shielding effect of the connecting and shielding assembly 1.

Further, the cover plate can be fixedly connected with the mounting groove at the end of the connecting sleeve 11 by welding or sealing.

Further, the shielding layer 12 covers the inner surface of the sidewall 111 of the connection sleeve 11 and has the same radial thickness, so that the connection sleeve 11 has the uniform shielding layer 12 and a stable shielding effect. Preferably, the shielding layer 12 is a plating layer provided on the connecting sleeve 11, so that the shielding layer 12 is thinner and lighter, on the one hand, the self weight of the connecting and shielding assembly 1 cannot be increased too much; on the other hand, the inner space of the accommodating cavity 112 can be greatly saved, and for example, the shielding layer 12 with the frequency of 5KHZ and the diameter of 20 μm can work.

Furthermore, the electroplating material selected for the shielding layer 12 is a soft magnetic alloy layer to form a complete and closed shielding layer 12, so that the shielding effect is better. Meanwhile, the shielding layer 12 does not need to be cut by an additional process or has the problem of difficulty in fixing, and the production efficiency is greatly improved. Preferably, the barrier layer 12 is a permalloy layer.

Further, the connecting sleeve 11 of the connecting and shielding assembly 1 is a stainless steel tube.

Further, the shielding layer 12 extends continuously in the circumferential direction of the connecting sleeve 11, so that the shielding effect of the connecting and shielding assembly 1 is optimized.

Further, the shielding layer 12 and the side wall 111 are disposed in contact without a gap in the radial direction of the connection sleeve 11, so that the inner space of the accommodating cavity 112 of the connection sleeve 11 is maximized, and the space utilization rate of the connection and shielding assembly 1 is improved.

The utility model also provides a displacement sensor, including coil pack 2 and foretell connection and shielding subassembly 1, improve this displacement sensor's magnetic shielding effect coil pack 2 includes coil body 21 along the axial extension of connecting sleeve 11 and the external portion 22 of being connected with coil body 21, the tip of external portion 22 extends outside the tip of connecting sleeve 11 and with sensor electric connection, when the equipment to be measured takes place the displacement relative to the sensor, connection and shielding subassembly 1 also takes place the displacement relative to the sensor, this sensor can sense the relative displacement of the equipment to be measured, specifically, this sensor's measurement principle is that this sensor is L VDT (L initial Variable Differential Transformer) type displacement sensor, it is by a primary, two secondary coils, the coil skeleton, parts such as shell constitute primary, secondary coil distributes on the coil skeleton, be provided with the connection and the shielding subassembly 1 of continuous shielding layer 12 structure and stretch into the coil inside, prevent that the coil magnetic field in the displacement sensor from influencing the normal operation of being located connecting sleeve 11 coil pack 2.

Referring to fig. 1 to fig. 3, in the present embodiment, the coil body 21 includes a first coil end 211 and a second coil end 212, the external connection portion 22 is located at the second coil end 212, and the coil body 21 is tapered from the first coil end 211 to the second coil end 212, so that the entire coil assembly 2 is placed in the accommodating cavity 112 surrounded by the side wall 111 of the connecting sleeve 11.

Further, the end surface of the connecting sleeve 11 is provided with an annular groove 113 surrounding the outer periphery of the accommodating cavity 112, the coil body 21 at the first coil end 211 is provided with a convex portion 23 surrounding the outer periphery of the first coil end 211 and engaged with the annular groove 113, so that the convex portion 23 of the coil body 21 is placed in the annular groove 113 at the end of the connecting sleeve 11, which can play a role of limiting on one hand, the coil assembly 2 is limited to generate axial displacement relative to the connecting sleeve 11 in a manner that the protruding portion 23 of the coil body 21 and the annular groove 113 of the first end form a snap connection, and on the other hand, a portion of the coil body 21 located in the accommodating cavity 112 is limited to be located in the middle of the connecting sleeve 11, so that a positioning effect is achieved, and the coil assembly 2 is prevented from rubbing against the shielding layer 12 located on the inner surface of the side wall 111 of the connecting sleeve 11 to damage the shielding layer 12, and the shielding effect is prevented from being affected.

Further, the convex portion 23 of the coil block 2 may be fixedly connected with the annular groove 113 at the end of the connection sleeve 11 by welding or potting.

Furthermore, the displacement sensor further comprises a shielding plate, the shielding plate is attached to the inner surface of the side wall 111 of the connecting sleeve 11, and the shielding plate and the shielding layer 12 which is arranged on the inner surface of the side wall 111 of the connecting sleeve 11 and integrally connected with the side wall 111 form a multi-layer shielding effect by being additionally provided, so that the magnetic shielding effect of the sensor is further improved.

Further, the displacement sensor is a linear variable differential transformer.

The above description is only a preferred embodiment of the present invention, and should not be taken as limiting the present invention, and any modifications, equivalents, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A connection and shielding assembly for connecting a sensor, comprising: the connecting and shielding assembly comprises a connecting sleeve and a shielding layer, the connecting sleeve is provided with a side wall, the side wall is enclosed into an accommodating cavity for accommodating the coil assembly, and two ends of the connecting sleeve are respectively provided with an opening communicated with the accommodating cavity; the shielding layer is arranged on the side wall of the connecting sleeve and is connected with the side wall into a whole.

2. The connecting and shielding assembly of claim 1, wherein: the shielding layer is arranged on the outer surface of the side wall of the connecting sleeve and is connected with the side wall into a whole.

3. The connecting and shielding assembly of claim 1, wherein: the shielding layer is arranged on the inner surface of the side wall of the connecting sleeve and is connected with the side wall into a whole.

4. The connecting and shielding assembly of claim 1, wherein: the shielding layer is arranged on the outer surface of the side wall of the connecting sleeve and the inner surface of the side wall, and is connected with the side wall into a whole.

5. The connecting and shielding assembly of claim 1, wherein: the connecting and shielding assembly further comprises a cover plate fixedly connected with the connecting sleeve, and the surface of the end part of the connecting sleeve is provided with an installation groove which is arranged around the periphery of the accommodating cavity and used for the cover plate to be placed in.

6. The connecting and shielding assembly of claim 5, wherein: the cover plate is provided with a penetrating hole for the coil assembly to penetrate through and extend out of the end part of the connecting sleeve.

7. The connecting and shielding assembly of claim 1, wherein: the shielding layers have the same radial thickness.

8. The connecting and shielding assembly of claim 1, wherein: the connecting sleeve is a stainless steel pipe.

9. The connecting and shielding assembly of claim 1, wherein: the shielding layer extends continuously in the circumferential direction of the connecting sleeve.

10. The connecting and shielding assembly of claim 1, wherein: the shielding layer and the side wall are arranged in a gapless contact mode in the radial direction of the connecting sleeve.

11. The connecting and shielding assembly of claim 1, wherein: the shielding layer is a soft magnetic alloy layer.

12. The connecting and shielding assembly of claim 11, wherein: the shielding layer is a permalloy layer.

13. The connecting and shielding assembly of any of claims 1-12, wherein: the shielding layer is an electroplated layer arranged on the connecting sleeve.

14. A displacement sensor, characterized by: comprising a coil assembly and a connecting and shielding assembly according to any one of claims 1-13; the coil assembly comprises a coil body extending along the axial direction of the connecting sleeve and an external connection portion connected with the coil body, and the end portion of the external connection portion extends to the outside of the end portion of the connecting sleeve and is electrically connected with the sensor.

15. The displacement sensor of claim 14, wherein: the coil body comprises a first coil end part and a second coil end part, and the external connection part is located at the second coil end part.

16. The displacement sensor of claim 14, wherein: the end surface of the connecting sleeve is provided with an annular groove surrounding the periphery of the accommodating cavity, and the coil body is positioned at the end part of the first coil and is provided with a bulge part surrounding the periphery of the end part of the first coil and connected with the annular groove in a clamping manner.

17. The displacement sensor of claim 14, wherein: the displacement sensor further comprises a shielding plate, and the shielding plate is attached to the inner surface of the side wall of the connecting sleeve.

18. The displacement sensor of claim 14, wherein: the displacement sensor is a linear variable differential transformer.