CN218155978U - Magnetic rotation angle sensor - Google Patents
Magnetic rotation angle sensor Download PDFInfo
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- CN218155978U CN218155978U CN202221900719.7U CN202221900719U CN218155978U CN 218155978 U CN218155978 U CN 218155978U CN 202221900719 U CN202221900719 U CN 202221900719U CN 218155978 U CN218155978 U CN 218155978U
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- cylinder
- protective cover
- flange bearing
- magnet
- shell
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Abstract
The utility model discloses a magnetic rotation angle sensor, which comprises a shell, a flange bearing, a rotating shaft, a magnet, a protective cover, a PCBA component and a sealing glue layer, wherein the flange bearing, the rotating shaft, the magnet, the protective cover, the PCBA component and the sealing glue layer are arranged in the shell; the shell comprises an upper shell and a lower shell which are integrally formed; the inner surface of the upper shell radially protrudes to form a first cylinder and a corresponding first accommodating cavity, and a flange bearing and a rotating shaft are arranged in the first accommodating cavity; the bottom of the flange bearing is positioned in a second accommodating cavity formed by the lower shell, and is in contact with the lower surface of the first cylinder, and is also sleeved in the protective cover and has a gap with the bottom surface of the inner cavity of the protective cover; the rotating shaft comprises a protruding part and a groove part which are positioned at two ends, the groove part is provided with a magnet, and the magnet is spaced from the bottom surface of the inner cavity of the protective cover; and a sealing glue layer for completely sealing the second accommodating cavity is also arranged below the PCBA component. The utility model discloses aim at improving angle sensor's protection level.
Description
Technical Field
The utility model relates to a sensor technical field especially relates to a magnetism rotation angle sensor.
Background
At present, due to the progress of modern control technology, an automatic control system, a servo system and an information feedback system are all provided with angle sensors, and the angle sensors are required to have the effects of long service life, high precision and good performance. Therefore, the angle sensor which is simple in structure, convenient to install and assemble, high in reliability and high in protection level is developed, and the angle sensor has important significance.
SUMMERY OF THE UTILITY MODEL
The utility model aims at providing a magnetism rotation angle sensor aims at solving the not high technical problem of current angle sensor protection level.
In order to achieve the above object, the utility model provides a magnetic rotation angle sensor, which comprises a shell, a flange bearing, a rotating shaft, a magnet, a protective cover, a PCBA component and a sealing glue layer, wherein the flange bearing, the rotating shaft, the magnet, the protective cover, the PCBA component and the sealing glue layer are arranged in the shell;
the shell comprises an upper shell and a lower shell which are integrally formed;
the inner surface of the upper shell radially protrudes to form a first cylinder and a corresponding first accommodating cavity, a flange bearing is tightly sleeved in the first accommodating cavity, and a rotating shaft is sleeved in the flange bearing in a penetrating manner;
the bottom of the flange bearing is positioned in a second accommodating cavity formed by the lower shell, the inner diameter of the second accommodating cavity is larger than that of the first accommodating cavity, the bottom of the flange bearing is contacted with the lower surface of the first cylinder, the bottom of the flange bearing is also sleeved in a lower protective cover and has a gap with the bottom surface of the inner cavity of the protective cover, the upper surface of the protective cover is also contacted with the lower surface of the first cylinder, and the side surface of the protective cover is tightly connected with the surface of the inner cavity of the lower shell;
the rotating shaft comprises a protruding part and a groove part which are positioned at two ends, the protruding part is positioned above the upper shell, the groove part is provided with a magnet, and the magnet is spaced from the bottom surface of the inner cavity of the protective cover;
the PCBA subassembly is located the protection casing below, just the PCBA subassembly lower surface has still laid with the totally enclosed sealant layer in second holding chamber.
Optionally, the PCBA subassembly includes the PCB board and welds magnetic induction chip and the shielded wire in both sides about the PCB board, the magnetic induction chip with the protection casing bottom surface contact, the sealing glue layer has been laid to the PCB board opposite side and has been allowed the shielded wire is worn out.
Optionally, the recessed portion and the magnet are both double-D shaped.
Optionally, the separation range of the magnet and the bottom surface of the inner cavity of the protective cover is greater than 0.2mm.
Optionally, the flange bearing outer surface is fixedly connected with the first cylinder inner surface.
Optionally, the bottom surface of the protective cover axially protrudes to form a second cylinder, the second cylinder is disposed in the cavity of the protective cover, and the bottom of the flange bearing is further fixedly disposed on the second cylinder.
Optionally, the flange bearing includes a third cylinder and a fourth cylinder having the same inner diameter, the outer diameter of the third cylinder is smaller than the outer diameter of the fourth cylinder, the third cylinder is centrally disposed on the fourth cylinder and the inner cavities of the third cylinder and the fourth cylinder are communicated, a region of the fourth cylinder not in contact with the third cylinder forms a ring structure and is in contact with the lower surface of the first cylinder, and the outer surface of the third cylinder is fixedly connected with the inner surface of the first cylinder.
Optionally, the surface of the upper shell or the lower shell is further provided with a plurality of connecting pieces, and each connecting piece is provided with a corresponding mounting hole.
The magnetic rotation angle sensor has the advantages of simple structure, few parts, convenient and quick assembly and low production cost, and effectively promotes good waterproof and dustproof performance and improves the protection grade by sealing and protecting the PCBA component by the shell, the sealing adhesive layer and the protective cover at two sides; in addition, a ball bearing is arranged in the shell and used for supporting the rotating shaft to rotate, so that the friction force in the rotating process of the rotating shaft is reduced, and the rotating precision of the magnetic field of the magnet is ensured. The magnet is installed in the two D shape recess portions of pivot to and magnet and protection casing have a certain clearance, make the recess portion not have the friction to produce, and then make product life greatly increased.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the structures shown in the drawings without creative efforts.
Fig. 1 is a sectional view of the magnetic rotation angle sensor of the present invention;
FIG. 2 is an exploded view of the embodiment of FIG. 1;
FIG. 3 is a schematic structural view of the housing structure shown in FIG. 1;
FIG. 4 is a schematic view of the flange bearing of FIG. 1;
FIG. 5 is a schematic structural view of the spindle shown in FIG. 1;
FIG. 6 is a schematic view of the magnet of FIG. 1;
FIG. 7 is a schematic view of the shield of FIG. 1;
FIG. 8 is a schematic view of the PCBA assembly shown in FIG. 1.
The reference numbers illustrate:
| reference numerals | Name (R) | Reference numerals | Name (R) |
| 1 | |
2 | Flange bearing |
| 3 | |
4 | |
| 5 | |
6 | |
| 7 | |
11 | |
| 12 | |
13 | Second containing cavity |
| 14 | A |
15 | Connecting |
| 21 | |
22 | The |
| 31 | |
32 | |
| 51 | |
61 | |
| 62 | |
63 | |
| 221 | Circular ring structure |
The purpose of the present invention, its functional features and advantages will be further described with reference to the accompanying drawings.
Detailed Description
The technical solutions of the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings, and obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.
It should be noted that all the directional indicators (such as upper and lower … …) in the embodiments of the present invention are only used to explain the relative position relationship between the components, the motion situation, etc. in a specific posture (as shown in the drawings), and if the specific posture is changed, the directional indicator is changed accordingly.
Furthermore, descriptions in the present application as to "first," "second," etc. are for descriptive purposes only and are not to be construed as indicating or implying relative importance or to implicitly indicate the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of the feature.
Moreover, the technical solutions of the present invention between the various embodiments can be combined with each other, but it is necessary to be able to be realized by a person having ordinary skill in the art as a basis, and when the technical solutions are combined and contradictory or cannot be realized, it should be considered that the combination of the technical solutions does not exist, and the present invention is not within the protection scope of the present invention.
Referring to fig. 1 to 8, the present invention provides a magnetic rotation angle sensor, as shown in fig. 1-2, comprising a housing 1, and a flange bearing 2, a rotating shaft 3, a magnet 4, a protective cover 5, a PCBA (printed circuit board assembly) component 6 and a sealant layer 7, which are disposed in the housing.
Specifically, as shown in fig. 3, the housing 1 includes an upper housing 11 and a lower housing 12 which are integrally formed, and the upper housing 11 and the lower housing 12 both use magnetic shielding metal materials, and the inner surface of the upper housing radially protrudes to form a first cylinder 14 and a corresponding first accommodating cavity thereof; as shown in fig. 1, a flange bearing 2 is tightly sleeved in the first accommodating cavity, a rotating shaft 3 is sleeved in the flange bearing 2 in a penetrating manner, as shown in fig. 5, the rotating shaft 3 includes a protruding portion 31 and a groove portion 32 which are located at two ends and are supported by a non-magnetic stainless steel material, and as shown in fig. 1, the protruding portion 31 is located above the upper housing 11, the groove portion 32 is provided with a magnet 4, the magnet 4 is spaced from the bottom surface of the inner cavity of the lower protective cover 5, so that the rotating shaft 3 does not generate friction with the protective cover 5 when driving the magnet 4 to rotate, and the side surface of the rotating shaft connecting the protruding portion 31 and the groove portion 32 is tightly abutted against the inner surface of the flange bearing 2, so that the rotation of the rotating shaft 3 is supported by the flange bearing 2, the friction coefficient in the movement process is reduced, the rotation precision of the rotating shaft is ensured, and the rotating shaft 3 is connected with a corresponding driving member.
As shown in fig. 1, the bottom of the flange bearing 2 is located in a second receiving cavity 13 formed by the lower housing 12, the first receiving cavity is communicated with the second receiving cavity 13, and the inner diameter of the second receiving cavity 13 is greater than the inner diameter of the first receiving cavity, the bottom of the flange bearing 2 contacts with the lower surface of the first cylinder 14, the bottom of the flange bearing 2 is further sleeved in the lower protective cover 5 and has a gap with the bottom surface of the inner cavity of the protective cover 5, the upper surface of the protective cover 5 also contacts with the lower surface of the first cylinder 14, the side surface of the protective cover 5 is tightly connected with the inner surface of the lower housing 12, and the outer surface of the flange bearing 2 is fixedly connected with the inner surface of the first cylinder 14, in this embodiment, the outer surface of the flange bearing 2 is fixed with the inner surface of the first cylinder 14 by bonding glue, so as to achieve that the magnet 4 is sealed in the sealing cavity formed by the flange bearing 2, the rotating shaft 3 and the protective cover 5; simultaneously, PCBA subassembly 6 is located 5 below of protection casing, just the PCBA subassembly 6 lower surface still laid with the totally enclosed sealant layer 7 of second holding chamber 13, and then all set up sealed protection in PCBA subassembly 6's both sides through protection casing 5 and sealant layer 7, can effectively promote angle sensor's protection level.
Further, as shown in fig. 8, the PCBA subassembly 6 includes PCB 61 and the magnetic induction chip 62 and the shielded wire 63 of welding both sides about the PCB 61, the magnetic induction chip 62 with the contact of 5 bottom surfaces of protection casing, the sealant layer 7 and the permission have been laid to the PCB 61 opposite side the shielded wire 63 is worn out, specifically, will put into the second holding chamber earlier PCBA subassembly 6 at actual installation PCBA subassembly 6 process to make the bottom surface laminating of magnetic induction chip 62 and protection casing 5 be in the same place, pour sealant into the second holding intracavity, and all cover the exposed part of sinle silk of shielded wire 63 and other electronic components on the PCB 61, place a period and solidify and obtain sealant layer 7, thereby fix PCBA subassembly 6 and protection casing 5 all sealedly in casing 1, in order to reach the IP protection level.
Further, as shown in fig. 5-6, the recess portion 32 and the magnet 4 are double-D-shaped and are matched with each other, and the magnet 4 is partially fixedly connected with the recess portion 32, generally, by using an adhesive glue; in addition, the protruding part 31 also adopts a double-D-shaped structure, and the connecting lines of the relative positions of the magnet 4 and the protruding part 301 are parallel to each other, namely the projections of the protruding part 301 and the magnet 4 on the same radial section of the rotating shaft 3 are mutually overlapped, the magnet 4 is driven to rotate through the rotating shaft 3, so that the magnetic field of the magnet 4 generates periodic change, the magnetic induction chip 62 installed on the PCBA component 6 can realize the output of any angle signal within 0-360 degrees through programming, and the initial zero position of the angle can be conveniently and quickly adjusted.
Furthermore, the interval range between the magnet 4 and the bottom surface of the inner cavity of the protective cover 5 is larger than 0.2mm, and the magnet 4 is a magnet and is made of a high-temperature-resistant and high-performance rare earth permanent magnet material.
Further, as shown in fig. 7, the protective cover 5 is a cylinder structure with a sealed bottom and an open top, and the bottom surface of the protective cover 5 protrudes inward axially to form a second cylinder 51, the second cylinder 51 is disposed in the cavity of the protective cover 5, and the bottom of the flange bearing 2 is further fixedly disposed on the second cylinder 51.
Further, as shown in fig. 3, the flanged bearing 2 includes a third cylinder 21 and a fourth cylinder 22 having the same inner diameter, the outer diameter of the third cylinder 21 is smaller than the outer diameter of the fourth cylinder 22, the third cylinder 21 is centrally disposed on the fourth cylinder 22, the inner cavities of the third cylinder 21 and the fourth cylinder 22 are communicated, a region of the fourth cylinder 22 not in contact with the third cylinder 21 forms a circular ring structure 221, the circular ring structure 221 is in contact with the lower surface of the first cylinder 14, so as to ensure that the flanged bearing 2 cannot move out from the lower housing 12 to the upper housing 11, and the outer surface of the third cylinder 21 is fixedly connected with the inner surface of the first cylinder 14, and the upper surface of the third cylinder 21 is aligned with the upper surface of the upper housing 11.
Further, as shown in fig. 1, a plurality of connecting members 15 are further disposed on the surface of the upper housing 11 or the lower housing 12, each connecting member 15 is provided with a corresponding mounting hole, and the angle sensor is mounted at a desired position through each mounting hole for use.
Further, in order to better explain the structure of the present invention, the following further explains the installation steps of the magnetic rotation angle sensor, as shown in fig. 2, the flange bearing 2 enters the housing 1 from the lower housing 12, and the corresponding glue is applied to the outer surface of the third cylinder 21 of the flange bearing 2 in advance, so that the outer surface of the flange bearing 2 is closely adhered and fixed to the inner surface of the first cylinder 14, and the upper surface of the fourth cylinder 22 of the flange bearing 2 abuts against the lower surface of the first cylinder 14;
then, sequentially placing the protective cover 5 and the PCBA assembly 6 into a second accommodating cavity of the lower shell 12 and tightly abutting against the inner surface of the lower shell 12, injecting sealing glue with a certain thickness into one side of the fixed PCBA assembly 6, completely covering the exposed part of the wire core of the shielding wire 63 and other electronic components on the PCB 61, enabling the shielding wire 63 to penetrate out, and obtaining a sealing glue layer 7 after the sealing glue is cured;
meanwhile, the corresponding magnet 4 is adhered in the groove part 31 of the rotating shaft 3 through glue, the groove part 31 and the magnet 4 are axially inserted along the flange bearing 2 and pass through the inner cavities of the third cylinder 21 and the fourth cylinder 22, wherein the third cylinder 21 and the fourth cylinder 22 are in interference fit with the rotating shaft 3, and the magnet 4 is controlled not to contact with the bottom surface of the protective cover 5 to have a certain gap.
In the above embodiments, the skilled person can adopt the prior art for software control, and the present invention only protects the structure and the mutual connection relationship of one kind of magnetic rotation angle sensor.
The above is only the preferred embodiment of the present invention, not so limiting the patent scope of the present invention, all of which are under the concept of the present invention, the equivalent structure transformation made by the contents of the specification and the drawings is utilized, or the direct/indirect application is included in other related technical fields in the patent protection scope of the present invention.
Claims (8)
1. A magnetic rotation angle sensor is characterized by comprising a shell (1), a flange bearing (2), a rotating shaft (3), a magnet (4), a protective cover (5), a PCBA component (6) and a sealant layer (7), wherein the flange bearing, the rotating shaft (3), the magnet, the protective cover and the PCBA component are arranged in the shell;
the shell (1) comprises an upper shell (11) and a lower shell (12) which are integrally formed;
the inner surface of the upper shell radially protrudes to form a first cylinder (14) and a first accommodating cavity corresponding to the first cylinder, a flange bearing (2) is tightly sleeved in the first accommodating cavity, and a rotating shaft (3) is sleeved in the flange bearing (2) in a penetrating manner;
the bottom of the flange bearing (2) is positioned in a second accommodating cavity (13) formed by the lower shell (12), the inner diameter of the second accommodating cavity (13) is larger than that of the first accommodating cavity, the bottom of the flange bearing (2) is in contact with the lower surface of the first cylinder (14), the bottom of the flange bearing (2) is further sleeved in the lower protective cover (5) and has a gap with the bottom surface of the inner cavity of the protective cover (5), the upper surface of the protective cover (5) is also in contact with the lower surface of the first cylinder (14), and the side surface of the protective cover (5) is tightly connected with the inner surface of the lower shell (12);
the rotating shaft (3) comprises a protruding portion (31) and a groove portion (32) which are located at two ends, the protruding portion (31) is located above the upper shell (11), the groove portion (32) is provided with a magnet (4), and the magnet (4) is spaced from the bottom surface of an inner cavity of the protective cover (5);
PCBA subassembly (6) are located protection casing (5) below, just PCBA subassembly (6) lower surface still laid with second holding chamber (13) totally enclosed sealant layer (7).
2. The magnetic rotation angle sensor according to claim 1, characterized in that the PCBA assembly (6) comprises a PCB (61) and magnetic induction chips (62) and shield wires (63) soldered on both upper and lower sides of the PCB (61), the magnetic induction chips (62) are in contact with the bottom surface of the shield cap (5), and the other side of the PCB (61) is provided with a sealant layer (7) and allows the shield wires (63) to pass out.
3. The magnetic rotation angle sensor according to claim 1, characterized in that the groove portion (32) and the magnet (4) are both double D-shaped.
4. The magnetic rotation angle sensor according to any one of claims 1 to 3, characterized in that the magnet (4) is spaced from the bottom surface of the inner cavity of the protective cover (5) by a distance of more than 0.2mm.
5. The magnetic rotation angle sensor according to claim 4, characterized in that the flange bearing (2) has an outer surface fixedly connected to the inner surface of the first cylinder (14).
6. The magnetic rotation angle sensor according to claim 4, characterized in that the bottom surface of the protective cover (5) protrudes axially to form a second cylinder (51), the second cylinder (51) is disposed in the cavity of the protective cover (5), and the bottom of the flange bearing (2) is further fixedly disposed on the second cylinder (51).
7. The magnetic rotation angle sensor according to claim 5, characterized in that the flanged bearing (2) comprises a third cylinder (21) and a fourth cylinder (22) having the same inner diameter, the outer diameter of the third cylinder (21) is smaller than the outer diameter of the fourth cylinder (22), the third cylinder (21) is arranged centrally on the fourth cylinder (22) and the inner cavities of the third cylinder (21) and the fourth cylinder (22) are communicated, the region of the fourth cylinder (22) not in contact with the third cylinder (21) forms a ring structure (221) and is in contact with the lower surface of the first cylinder (14), and the outer surface of the third cylinder (21) is fixedly connected with the inner surface of the first cylinder (14).
8. The magnetic rotation angle sensor according to any one of claims 5 to 7, characterized in that the upper housing (11) or lower housing (12) is also provided with a plurality of connectors (15) on the surface, each connector (15) being provided with a corresponding mounting hole.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221900719.7U CN218155978U (en) | 2022-07-22 | 2022-07-22 | Magnetic rotation angle sensor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221900719.7U CN218155978U (en) | 2022-07-22 | 2022-07-22 | Magnetic rotation angle sensor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN218155978U true CN218155978U (en) | 2022-12-27 |
Family
ID=84594291
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202221900719.7U Active CN218155978U (en) | 2022-07-22 | 2022-07-22 | Magnetic rotation angle sensor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN218155978U (en) |
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2022
- 2022-07-22 CN CN202221900719.7U patent/CN218155978U/en active Active
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