Gear transmission type novel waterproof encoder

Abstract

The utility model discloses a gear transmission type novel waterproof encoder, which comprises a support, an outer ring piece rotatably arranged at a cavity opening of the support, a PCB (printed circuit board) and an independent gear rotatably arranged, a Hall chip is arranged on the PCB, the outer ring piece is provided with an inner gear part matched with the independent gear, and the outer ring piece is provided with an inner gear part matched with the independent gear. The independent gear is arranged above the Hall chip in a suspended mode, and a magnet piece is fixedly arranged at the independent gear. According to the utility model, the magnet piece is used as a trigger element to be installed at the independent gear, the Hall chip is correspondingly arranged right below the magnet piece, when the outer ring piece is screwed to rotate, the magnet piece changes the magnetic flux of the Hall chip when the independent gear rotates along with the outer ring piece, and the Hall chip determines a rotation direction signal of the outer ring piece according to the change of the magnetic flux. And then the gear signal is further confirmed by combining the gear ratio between the independent gear and the inner gear part of the outer ring piece, and finally the gear signal is converted into an electronic signal by the PCB.

Description

Technical Field

[0001] The utility model relates to the technical field related to encoders, in particular to a new type of gear-driven waterproof encoder. Background Art

[0002] An encoder is a communication device that converts angular displacement or linear displacement into electrical signals. It uses the Hall effect to change the magnetic flux at the Hall chip so that it generates a corresponding induction signal according to the change in magnetic flux, and the PCB board then converts the induction signal into an electrical signal. Most existing encoders are equipped with an outer ring and an inner ring. When the outer ring is turned, the inner ring rotates synchronously with the outer ring. A number of magnets distributed in a circular array are arranged at the inner ring. When the inner ring rotates, each magnet passes through the Hall chip, causing its magnetic flux to change, and then the Hall chip generates a corresponding signal according to the change in magnetic flux. In order to further simplify the structure of the encoder, we propose a new waterproof encoder with gear transmission. Utility Model Content

[0003] The utility model aims to overcome the deficiencies of the prior art and provide a novel waterproof encoder of gear transmission type.

[0004] To achieve the above-mentioned purpose, the utility model adopts the following technical scheme: a new waterproof encoder of gear transmission type, comprising a fixed bracket, an outer ring member rotatably arranged at the cavity opening of the bracket, and a PCB board fixedly arranged in the inner cavity of the bracket, wherein the PCB board is provided with a Hall chip, and further comprising a rotatable independent gear, wherein the outer ring member is provided with an internal gear part matching with the independent gear, wherein the independent gear is suspended above the Hall chip, and a magnet member is fixedly arranged at the independent gear, wherein the magnet member changes the magnetic flux of the Hall chip when the independent gear rotates, so that the Hall chip generates a corresponding signal according to the change of the magnetic flux.

[0005] It is further explained that the independent gear is provided with a boss portion facing the Hall chip, and a cavity for mounting the magnet member is provided in the boss portion.

[0006] To further explain, the inner cavity of the bracket is provided with limiting parts arranged at equal intervals, and the limiting parts are used to limit the installation position of the PCB board.

[0007] It is further explained that the bracket is filled with sealant, the PCB board is sealed in the sealant, and the liquid level of the sealant is lower than the position height of the magnet component.

[0008] The beneficial effect of the utility model is that the utility model installs the magnet as a trigger element at the independent gear, and a Hall chip is correspondingly arranged directly below the magnet. When the outer ring part is rotated, the magnet changes the magnetic flux of the Hall chip when the independent gear rotates with the outer ring part. The Hall chip determines the rotation direction signal of the outer ring part according to the change of the magnetic flux, and then further confirms the gear signal in combination with the tooth ratio between the independent gear and the inner gear part of the outer ring part, and finally the gear signal is converted into an electronic signal by the PCB board. BRIEF DESCRIPTION OF THE DRAWINGS

[0009] Figure 1 It is a schematic diagram of the structural decomposition of the utility model.

[0010] Figure 2 This is a partial structural sectional view of the utility model (note: the bracket has been hidden).

[0011] Figure 3 It is a top view of the utility model.

[0012] Figure 4 This is a partial structural cross-sectional view of the utility model after the PCB board is filled with sealant (Note: the outer ring part has been hidden).

[0013] Figure numbers: 10, bracket; 11, limit part; 20, outer ring; 21, inner gear part; 30, PCB board; 31, Hall chip; 40, independent gear; 41, middle boss part; 50, magnet part; 60, sealant. DETAILED DESCRIPTION

[0014] In order to make the purpose, technical solutions and advantages of the utility model clearer, the utility model will be further described in detail below with reference to the accompanying drawings.

[0015] Combined with Figure 1 As shown, a new waterproof encoder of gear transmission type includes a fixed bracket 10, an outer ring member 20 rotatably arranged at the cavity of the bracket 10, and a PCB board 30 fixedly arranged in the inner cavity of the bracket 10, and a Hall chip 31 is arranged at the PCB board 30. Figure 1 To Attachment Figure 3 As shown, the waterproof encoder specifically includes an independent gear 40 that is rotatably arranged, the outer ring member 20 is provided with an internal gear portion 21 that matches the independent gear 40, the independent gear 40 is suspended above the Hall chip 31, a magnet member 50 is fixedly arranged at the independent gear 40, the internal gear portion 21 of the outer ring member 20 is meshed with the independent gear 40, and when the outer ring member 20 is twisted to rotate, the independent gear 40 will rotate synchronously with the outer ring member 20. The magnet member 50 changes the magnetic flux of the Hall chip 31 when the independent gear 40 rotates, so that the Hall chip 31 generates a corresponding signal according to the change of the magnetic flux.

[0016] Combined with Figure 1 and attached Figure 2 As shown, the independent gear 40 is provided with a middle boss portion 41 facing the Hall chip 31, and a concave cavity for installing the magnet 50 is provided in the middle boss portion 41. The magnet 50 is fixed in the concave cavity of the middle boss portion 41 of the independent gear 40. In addition, the outer wall of the outer ring member 20 is also designed with a fluctuation disk, and when the outer ring member 20 rotates, it will pass over the fixed spring assembly, thereby generating the gear feel and position feedback.

[0017] Combined with Figure 1 and attached Figure 4 As shown, the inner cavity of the bracket 10 is provided with equally spaced limiting portions 11, which are used to limit the installation position of the PCB board 30. The limiting portions 11 of the bracket 10 specifically play the role of supporting the PCB board 30 and affect the installation height of the PCB board 30.

[0018] As attached Figure 4 As shown, the bracket 10 is filled with sealant 60, and the PCB board 30 is sealed in the sealant 60, and the liquid level of the sealant 60 is lower than the position height of the magnet 50. The PCB board 30, the Hall chip 31 and related core components are all wrapped by the sealant 60, thereby achieving a high sealing and waterproof effect.

[0019] The utility model adopts the structural design principle of direction and gear position communication. The magnet part 50 is installed at the independent gear 40 as a trigger element, and a Hall chip 31 welded at the PCB board 30 is correspondingly arranged directly below the magnet part 50. When the outer ring part 20 is twisted to rotate, the independent gear 40 rotates synchronously driven by the inner gear part 21 of the outer ring part 20, and the magnet part 50 at the independent gear 40 also rotates synchronously with it. The Hall chip 31 at the PCB board 30 is used as a sensing element to sense the strength of the magnetic flux at the corresponding position of the rotation of the magnet part 50 above it to determine the rotation direction signal of the outer ring part 20, and then further confirm the gear position signal in combination with the gear ratio between the independent gear 40 and the inner gear part 21 of the outer ring part 20, and finally the gear position signal is converted into an electronic signal by the PCB board 30.

[0020] In the description of the present invention, it should be understood that the terms "upper", "lower", "front", "back", "left", "right", "top", "bottom", "inside", "outside", etc., indicating directions or positional relationships, are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore should not be understood as a limitation on the present invention.

[0021] The above description does not limit the technical scope of the present invention. Any modification, equivalent changes and modifications made to the above embodiments based on the technical essence of the present invention are still within the scope of the technical solution of the present invention.

Claims

1. A novel gear-driven waterproof encoder, comprising a fixed bracket (10), an outer ring member (20) rotatably arranged at the cavity of the bracket (10), and a PCB board (30) fixedly arranged in the inner cavity of the bracket (10), wherein the PCB board (30) is provided with a Hall chip (31), and is characterized in that: The invention also includes an independent gear (40) that is rotatably arranged. The outer ring member (20) is provided with an internal gear portion (21) that matches the independent gear (40). The independent gear (40) is suspended above the Hall chip (31). A magnet member (50) is fixedly arranged at the independent gear (40). When the independent gear (40) rotates, the magnet member (50) changes the magnetic flux of the Hall chip (31), so that the Hall chip (31) generates a corresponding signal according to the change in the magnetic flux.

2. The novel gear-driven waterproof encoder according to claim 1, characterized in that: The independent gear (40) is provided with a middle boss portion (41) facing the Hall chip (31), and a cavity for mounting the magnet component (50) is provided in the middle boss portion (41).

3. The novel gear-driven waterproof encoder according to claim 1, characterized in that: Limiting portions (11) arranged at equal intervals are provided in the inner cavity of the bracket (10), and the limiting portions (11) are used to limit the installation position of the PCB board (30).

4. The novel gear-driven waterproof encoder according to claim 1, characterized in that: The bracket (10) is filled with a sealant (60), the PCB board (30) is sealed in the sealant (60), and the liquid level of the sealant (60) is lower than the position height of the magnet component (50).

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