Magnetic rotation type digital sensor

Abstract

The utility model relates to a magnetic rotation type digital sensor which comprises an output rotating shaft and a shell, the output rotating shaft is rotatably installed in the shell in a penetrating mode, a magnet is installed at the center of the inner end of the output rotating shaft, a bottom shell is installed at the end of the shell, a PCB control board is installed in the bottom shell, and a magnetic encoder is installed on the inner side of the PCB control board. The sensor is simple in overall structure, low in cost, small in size, convenient to install and high in recognition precision. And a plurality of sensors can be connected in series, and 485 digital output is convenient and can be directly read without an additional reading device.

Description

Technical Field

[0001] The utility model relates to the technical field of sensors, in particular to a magnetic rotary digital sensor. Background Art

[0002] The magnetic rotary encoder has a simple and compact structure, can still work stably at high speed with a fast response speed, is smaller in volume than the photoelectric encoder, lower in cost than the photoelectric encoder, and can easily arrange and combine multiple components to form new functional and multi-functional devices. Based on the above advantages, in recent years, in the field of high-precision measurement and control, the application of magnetic rotary encoders has been increasing continuously. From the position detection and transmission speed control of numerical control machine tools, robots, and factory automation-related equipment to the measurement and control of the rotation amount in various fields such as office automation equipment such as disks and printers, communication machines, and measuring instruments, magnetic encoders have become an indispensable component.

[0003] The defects of the existing sensors are as follows:

[0004] High-precision sensors are expensive, 485 bus digital sensors are large in volume, and sensors cannot be connected in series with each other. Content of the Utility Model

[0005] The problem solved by the utility model is to provide a magnetic rotary digital sensor, which solves the technical problems of high price of high-precision sensors, large volume of 485 bus digital sensors, and inability of sensors to be connected in series with each other.

[0006] In order to achieve the above purpose, the utility model adopts the following technical scheme:

[0007] A magnetic rotary digital sensor includes an output rotating shaft and a housing. The output rotating shaft is rotatably installed through the housing, and a magnet is installed at the center of the inner end of the output rotating shaft. A bottom case is installed at the end of the housing, and a PCB control board is installed in the bottom case. A magnetic encoder is installed inside the PCB control board.

[0008] Preferably, a shaft shoulder is provided in the middle of the output rotating shaft, the outer end of the output rotating shaft is a D-type head, and a snap ring groove is provided on the D-type head.

[0009] Preferably, the output rotating shaft is rotatably connected to the housing through a first deep groove ball bearing and a second deep groove ball bearing, and the first deep groove ball bearing and the second deep groove ball bearing are respectively located on both sides of the shaft shoulder of the output rotating shaft.

[0010] Preferably, the output rotating shaft and the housing are connected by two snap rings.

[0011] Preferably, a control chip, a signal output module, and two symmetrically arranged communication connectors are installed outside the PCB control board.

[0012] The beneficial effects of the present utility model are as follows: The overall structure of the sensor is simple, with low cost, small size, convenient installation, and high recognition accuracy; moreover, multiple sensors can be connected in series, and the 485 digital output is convenient and can be directly read without additional reading devices. Description of the Drawings

[0013] Figure 1 It is a schematic diagram of the overall structure of the present utility model;

[0014] Figure 2 It is a side view of the overall structure of the present utility model;

[0015] Figure 3 It is a bottom view of the overall structure of the present utility model;

[0016] Figure 4 For the present utility model Figure 2 Cross-sectional view A-A in it.

[0017] Legend Explanation:

[0018] 1. Output rotating shaft; 2. Outer shell; 3. First deep groove ball bearing; 4. Second deep groove ball bearing; 5. Snap ring; 6. Magnet; 7. Magnetic encoder; 8. PCB control board; 9. Bottom shell; 10. Communication connector; 11. Snap ring groove; 12. D-type head; 13. Axle shoulder; 14. Control chip; 15. Signal output module. Specific Embodiments

[0019] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without making creative efforts belong to the scope of protection of the present utility model.

[0020] The following gives specific embodiments.

[0021] Refer to Figures 1 to 4 , a magnetic rotary digital sensor, including an output rotating shaft 1 and an outer shell 2. The output rotating shaft 1 is rotatably installed through the inside of the outer shell 2, and a magnet 6 is installed at the center of the inner end of the output rotating shaft 1. An axle shoulder 13 is provided in the middle of the output rotating shaft 1, and the outer end of the output rotating shaft 1 is set as a D-type head 12, and a snap ring groove 11 is opened on the D-type head 12. The output rotating shaft 1 is rotationally connected to the outer shell 2 through a first deep groove ball bearing 3 and a second deep groove ball bearing 4, and the first deep groove ball bearing 3 and the second deep groove ball bearing 4 are respectively located on both sides of the axle shoulder 13 of the output rotating shaft 1. The output rotating shaft 1 and the outer shell 2 are connected by two snap rings 5 for rotationally installing and connecting the output rotating shaft 1 and the outer shell 2.

[0022] A bottom case 9 is installed at the end of the housing 2. A PCB control board 8 is installed inside the bottom case 9. A magnetic encoder 7 is installed inside the PCB control board 8. A control chip 14, a signal output module 15 and two symmetrically arranged communication connectors 10 are installed outside the PCB control board 8. The rotation of the output rotating shaft 1 and the magnet 6 is detected by the magnetic encoder 7, and signals are output through the signal output module 15. And the output signals are read and used in series through the communication connectors 10.

[0023] The first deep groove ball bearing 3 is placed from the upper part of the output rotating shaft 1. After the first deep groove ball bearing 3 fits against the top side of the shoulder 13 of the output rotating shaft 1, it is fixed with a circlip 5. A small amount of magnetic steel adhesive is applied to the magnet groove at the end of the output rotating shaft 1, and the magnet 6 is placed. After standing for 2 hours, it solidifies. The second deep groove ball bearing 4 is placed from the lower part of the output rotating shaft 1. The second deep groove ball bearing 4 fits against the bottom side of the shoulder 13 of the output rotating shaft 1. The output rotating shaft 1 is assembled with the housing 2 and fixed with the circlip 5 and the circlip groove 11 of the housing 2. The PCB control board 8 is placed and fitted inside the bottom case 9 at the bottom of the housing 2, and is evenly coated with silicone and cooled and fixed. Among them, the circlip groove 11, the D-shaped head 12 and the threaded fixing holes on the housing 2 are used for fixed connection of the sensor, and the two communication connectors 10 are used for signal reading and series use.

[0024] The above is only the preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present invention, according to the technical solution of the present invention and its inventive concept, makes equivalent replacements or changes, and should be covered by the protection scope of the present invention.

Claims

1. A magnetic rotation type digital sensor, characterized in that, It includes an output rotating shaft (1) and a housing (2). The output rotating shaft (1) is rotatably installed through the inside of the housing (2), and a magnet (6) is installed at the center of the inner end of the output rotating shaft (1). A bottom shell (9) is installed at the end of the housing (2), and a PCB control board (8) is installed inside the bottom shell (9). A magnetic encoder (7) is installed on the inner side of the PCB control board (8).

2. The magnetic rotation type digital sensor according to claim 1, wherein A shaft shoulder (13) is provided in the middle of the output rotating shaft (1). The outer end of the output rotating shaft (1) is a D-shaped head (12), and a snap ring groove (11) is provided on the D-shaped head (12).

3. The magnetic rotation type digital sensor according to claim 2, characterized in that, The output rotating shaft (1) is rotatably connected to the housing (2) through a first deep groove ball bearing (3) and a second deep groove ball bearing (4), and the first deep groove ball bearing (3) and the second deep groove ball bearing (4) are respectively located on both sides of the shaft shoulder (13) of the output rotating shaft (1).

4. The magneto-rotary digital sensor according to claim 3, characterized in that, The output rotating shaft (1) and the housing (2) are connected by two snap rings (5).

5. A magnetic rotation type digital sensor according to claim 4, characterized in that, A control chip (14), a signal output module (15) and two symmetrically arranged communication connectors (10) are installed on the outer side of the PCB control board (8).

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