CN210513170U - Use sealed photoelectric encoder on unmanned aerial vehicle counter-braking equipment - Google Patents

Abstract

A sealed photoelectric encoder applied to unmanned aerial vehicle countering equipment, comprising: the device comprises a photoelectric code disc, an encoder circuit board, a liquid magnetofluid, an N-pole magnetic pole, an S-pole magnetic pole, a permanent magnet, a magnetofluid shaft sleeve, a main shaft, a motor shell and a motor; the magnetic fluid shaft sleeve is arranged on a main shaft of the motor, and an N-pole magnetic pole and an S-pole magnetic pole are respectively sleeved at two ends of the magnetic fluid shaft sleeve; the S pole magnetic pole is fixedly connected with the motor shell, the N pole magnetic pole is fixedly connected with the S pole magnetic pole, and an annular permanent magnet is arranged between the N pole magnetic pole and the S pole magnetic pole; the photoelectric code disc is fixed on the magnetic fluid shaft sleeve, the encoder circuit board is fixed on the N-pole magnetic pole, a gap is kept between the N-pole magnetic pole and the magnetic fluid shaft sleeve and between the S-pole magnetic pole and the magnetic fluid shaft sleeve, and liquid magnetic fluid is injected into the gap. The utility model discloses can avoid photoelectric encoder's code wheel and LED to receive invasion and attack such as water, oil, dust, make photoelectric encoder can use under open air and adverse circumstances.

Description

Use sealed photoelectric encoder on unmanned aerial vehicle counter-braking equipment

Technical Field

The utility model belongs to the photoelectric encoder field, concretely relates to use sealed photoelectric encoder on unmanned aerial vehicle reverse system equipment.

Background

The photoelectric encoder has the advantages of small volume, high precision, no contact, long service life, rich interface forms and reasonable price, and is widely applied. However, when the photoelectric encoder is used outdoors and in a severe environment, the code disc and the LED of the photoelectric encoder are easily attacked by water, oil, dust and the like, and the normal use of the photoelectric encoder is seriously affected, so that higher protection requirements are provided for the photoelectric encoder. Unmanned aerial vehicle reverse system equipment need be in outdoor full-time, all-weather on duty work for a long time, and the photoelectric encoder that reverse system equipment revolving stage used needs sealed protection.

The magnetic fluid sealing technology is developed on the basis of magnetic fluid, and when the magnetic fluid is injected into the gap of a magnetic field, the magnetic fluid can fill the whole gap to form a liquid O-shaped sealing ring. The magnetic fluid sealing device has the function of transmitting rotary motion into a sealed container, and is commonly used for vacuum sealing.

SUMMERY OF THE UTILITY MODEL

The utility model discloses to not enough among the prior art, provide an use sealed photoelectric encoder on unmanned aerial vehicle reverse system equipment, avoid photoelectric encoder's code wheel and LED to receive invasion and attack such as water, oil, dust, make photoelectric encoder can use under open air and adverse circumstances.

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

the utility model provides an use sealed photoelectric encoder on unmanned aerial vehicle counter-braking equipment which characterized in that includes: the device comprises a photoelectric code disc, an encoder circuit board, a liquid magnetofluid, an N-pole magnetic pole, an S-pole magnetic pole, a permanent magnet, a magnetofluid shaft sleeve, a main shaft, a motor shell and a motor; the magnetic fluid shaft sleeve is arranged on a main shaft of the motor, and an N-pole magnetic pole and an S-pole magnetic pole are respectively sleeved at two ends of the magnetic fluid shaft sleeve; the S pole magnetic pole is fixedly connected with the motor shell, the N pole magnetic pole is fixedly connected with the S pole magnetic pole to ensure the continuity of magnetic flux between the N pole and the S pole, and an annular permanent magnet is arranged between the N pole magnetic pole and the S pole magnetic pole; the photoelectric code disc is fixed on the magnetic fluid shaft sleeve, the encoder circuit board is fixed on the N-pole magnetic pole, gaps are kept between the N-pole magnetic pole and the magnetic fluid shaft sleeve and between the S-pole magnetic pole and the magnetic fluid shaft sleeve, liquid magnetic fluid is injected into the gaps, and the liquid magnetic fluid is adsorbed between the S-pole magnetic pole and the magnetic fluid shaft sleeve and between the N-pole magnetic pole and the magnetic fluid shaft sleeve under the action of the permanent magnet to form an O-shaped sealing ring of liquid.

In order to optimize the technical scheme, the specific measures adopted further comprise:

further, the main shaft and the motor shell are connected through an angular contact ball bearing.

Further, the permanent magnet material is neodymium iron boron.

Further, the liquid carrier of the liquid magnetic fluid is fluoroether oil.

Further, the liquid clearance between the N pole magnetic pole and the magnetic fluid shaft sleeve as well as between the S pole magnetic pole and the magnetic fluid shaft sleeve is 0.1 mm.

Furthermore, the S pole and the motor shell are connected through an M3 bolt, and the N pole and the S pole are bonded through epoxy resin magnetic powder glue.

The utility model has the advantages that: by applying the magnetic fluid sealing element to the protection of the photoelectric encoder, the photoelectric encoder can be used outdoors and in severe environments.

Drawings

Fig. 1 is a schematic structural diagram of the turntable motor of the present invention.

Fig. 2 is a schematic structural diagram of the magnetic fluid sealing element of the present invention.

Fig. 3a is a perspective view of the magnetic fluid shaft sleeve of the present invention.

Fig. 3b is a side view of the magnetic fluid sleeve of the present invention.

Fig. 4a is a perspective view of the S-pole magnetic pole of the present invention.

Fig. 4b is a side view of the S-pole of the present invention.

Fig. 5a is a perspective view of the N-pole magnetic pole of the present invention.

Fig. 5b is a side view of the N-pole of the present invention.

Fig. 6a is a perspective view of the permanent magnet of the present invention.

Fig. 6b is a side view of the permanent magnet of the present invention.

Fig. 7 is a partial schematic view of the installation of the magnetic fluid shaft sleeve of the present invention.

Fig. 8 is a partial schematic view of the S-pole mounting of the present invention.

Fig. 9 is a schematic view of the magnetic lines generated by the present invention.

The reference numbers are as follows: 1. a photoelectric code disc; 2. an encoder circuit board; 3. a liquid magnetic fluid; 4. an N-pole magnetic pole; 5. a permanent magnet; 6. a magnetic fluid shaft sleeve; 7. a main shaft; 8. angular contact ball bearings; 9. a motor housing; 10. an S pole magnetic pole; 11. an electric motor.

Detailed Description

The present invention will be described in detail with reference to the accompanying drawings.

The sealed photoelectric encoder applied to the unmanned aerial vehicle reverse braking device shown in fig. 1 and fig. 2 comprises a photoelectric coded disc 1, an encoder circuit board 2, a liquid magnetic fluid 3, an N-pole magnetic pole 4, an S-pole magnetic pole 10, a permanent magnet 5, a magnetic fluid shaft sleeve 6, a main shaft 7, an angular contact ball bearing 8, a motor shell 9 and a motor 11.

The magnetic fluid shaft sleeve 6 is arranged on a main shaft 7 of a motor 11, and the two ends of the magnetic fluid shaft sleeve 6 are respectively sleeved with an N-pole magnetic pole 4 and an S-pole magnetic pole 10. The S pole magnetic pole 10 is fixedly connected with the motor shell 9, the N pole magnetic pole 4 is fixedly connected with the S pole magnetic pole 10, and the permanent magnet 5 is arranged between the N pole magnetic pole 4 and the S pole magnetic pole 10. The photoelectric encoder comprises a photoelectric code disc 1 and an encoder circuit board 2, wherein the photoelectric code disc 1 is fixed on a magnetic fluid shaft sleeve 6, the encoder circuit board 2 is fixed on an N-pole magnetic pole 4, a 0.1mm gap is kept between the N-pole magnetic pole 4 and the magnetic fluid shaft sleeve 6 and between an S-pole magnetic pole 10 and the magnetic fluid shaft sleeve 6, and a liquid magnetic fluid 3 is injected into the gap. The liquid magnetic fluid 3 is absorbed between the S pole magnetic pole 10 and the magnetic fluid shaft sleeve 6 and between the N pole magnetic pole 4 and the magnetic fluid shaft sleeve 6 under the action of the permanent magnet 5 to form a liquid O-shaped sealing ring, so that the photoelectric encoder 1 and the encoder circuit board 2 are prevented from being invaded by water, oil, dust and the like, and the photoelectric encoder can be used outdoors and in severe environments.

In order to ensure that a gap of 0.1mm is kept between the two magnetic poles and the magnetic fluid shaft sleeve 6, a front pair of bearings and a rear pair of bearings are usually added on the magnetic fluid sealing element. But this greatly increases the axial length of the opto-electronic encoder after sealing. The utility model discloses a method of magnetic current body sealing member and revolving stage motor sharing same bearing has solved this problem.

The main shaft 7 and the motor shell 9 are connected through back-to-back angular contact ball bearings 8, have the function of automatic centering and can bear larger axial and radial force.

As shown in fig. 3a to 6b, the magnetic fluid sleeve 6, the S-pole magnetic pole 10, the N-pole magnetic pole 4, and the permanent magnet 5 are respectively a side view and a perspective view. The permanent magnet 5 is a ring structure, and the magnetizing direction is shown in fig. 6 b.

As shown in fig. 7, the magnetic fluid sleeve 6 is mounted on the main shaft 7 by screwing. As shown in fig. 8, the S pole 10 is attached to the motor housing 9, and the N pole 4 is attached to the S pole 10. The S-pole magnetic pole 10 and the motor housing 9 are connected by M3 bolts. The N pole magnetic pole 4 and the S pole magnetic pole 10 are bonded through epoxy resin magnetic powder glue, and the continuity of magnetic flux between the N pole and the S pole is guaranteed.

As shown in fig. 9, the magnetic fluid shaft sleeve 6, the S-pole magnetic pole 10, and the N-pole magnetic pole 4 are made of magnetic materials, and the magnetic lines of force formed under the action of the permanent magnet 5 are shown by dotted lines. The liquid magnetic fluid 3 is absorbed between the S pole magnetic pole 10 and the magnetic fluid shaft sleeve 6 and between the N pole magnetic pole 4 and the magnetic fluid shaft sleeve 6 by magnetic lines of force to form an O-shaped sealing ring of liquid. The coded disc and the LED of the photoelectric encoder are prevented from being invaded by water, oil, dust and the like, so that the photoelectric encoder can be used outdoors and in severe environment.

It should be noted that, in the present invention, the terms "upper", "lower", "left", "right", "front", "back", etc. are used for the sake of clarity only, and are not used to limit the scope of the present invention, and the relative relationship changes or adjustments may be made without substantial technical changes.

Above only the utility model discloses an it is preferred embodiment, the utility model discloses a scope of protection not only limits in above-mentioned embodiment, and the all belongs to the utility model discloses a technical scheme under the thinking all belongs to the utility model discloses a scope of protection. It should be noted that, for those skilled in the art, a plurality of modifications and decorations without departing from the principle of the present invention should be considered as the protection scope of the present invention.

Claims (6)

1. The utility model provides an use sealed photoelectric encoder on unmanned aerial vehicle counter-braking equipment which characterized in that includes: the device comprises a photoelectric coded disc (1), an encoder circuit board (2), a liquid magnetic fluid (3), an N-pole magnetic pole (4), an S-pole magnetic pole (10), a permanent magnet (5), a magnetic fluid shaft sleeve (6), a main shaft (7), a motor shell (9) and a motor (11); the magnetic fluid shaft sleeve (6) is arranged on a main shaft (7) of the motor (11), and the two ends of the magnetic fluid shaft sleeve (6) are respectively sleeved with an N-pole magnetic pole (4) and an S-pole magnetic pole (10); the S-pole magnetic pole (10) is fixedly connected with the motor shell (9), the N-pole magnetic pole (4) is fixedly connected with the S-pole magnetic pole (10) to ensure the continuity of magnetic flux between the N pole and the S pole, and the annular permanent magnet (5) is arranged between the N-pole magnetic pole (4) and the S-pole magnetic pole (10); the photoelectric encoder is characterized in that the photoelectric encoder (1) is fixed on the magnetic fluid shaft sleeve (6), the encoder circuit board (2) is fixed on the N-pole magnetic pole (4), gaps are kept between the N-pole magnetic pole (4) and the magnetic fluid shaft sleeve (6) and between the S-pole magnetic pole (10) and the magnetic fluid shaft sleeve (6), liquid magnetic fluid (3) is injected into the gaps, and the liquid magnetic fluid (3) is adsorbed between the S-pole magnetic pole (10) and the magnetic fluid shaft sleeve (6) and between the N-pole magnetic pole (4) and the magnetic fluid shaft sleeve (6) under the action of the permanent magnet (5) to form an O-shaped sealing ring of liquid.

2. The sealed photoelectric encoder applied to the unmanned aerial vehicle counter-acting device as claimed in claim 1, wherein: the main shaft (7) and the motor shell (9) are connected through an angular contact ball bearing (8).

3. The sealed photoelectric encoder applied to the unmanned aerial vehicle counter-acting device as claimed in claim 1, wherein: the permanent magnet (5) is made of neodymium iron boron.

4. The sealed photoelectric encoder applied to the unmanned aerial vehicle counter-acting device as claimed in claim 1, wherein: the liquid carrier of the liquid magnetic fluid (3) is fluoroether oil.

5. The sealed photoelectric encoder applied to the unmanned aerial vehicle counter-acting device as claimed in claim 1, wherein: and liquid gaps between the N-pole magnetic pole (4) and the magnetic fluid shaft sleeve (6) and between the S-pole magnetic pole (10) and the magnetic fluid shaft sleeve (6) are 0.1 mm.

6. The sealed photoelectric encoder applied to the unmanned aerial vehicle counter-acting device as claimed in claim 1, wherein: the S pole magnetic pole (10) and the motor shell (9) are connected through an M3 bolt, and the N pole magnetic pole (4) and the S pole magnetic pole (10) are bonded through epoxy resin magnetic powder glue.

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