Magnetic vernier gear encoder

Abstract

The utility model discloses a magnetic vernier gear encoder which comprises a protective shell, a supporting plate fixedly connected to the surface of the inner wall of the protective shell, a rotating shaft fixedly installed in a first transmission bearing, a main gear fixedly installed on the surface of the rotating shaft, and a vernier gear fixedly installed in a second transmission bearing. A control circuit board is fixedly installed on the surface of the supporting plate, magneto-dependent sensors are fixedly installed below the main gear and the vernier gear, the bottom of a rotating shaft penetrates through a first transmission bearing to be fixedly connected with a first bevel gear, a driven shaft is rotationally installed at one end of a positioning rod, a cooling fan is installed at one end of the driven shaft, and the other end of the driven shaft is fixedly connected with a second bevel gear. The beneficial effects of the utility model are that after the main gear and the vernier gear are driven by the rotating shaft to rotate, the bevel gear I drives the driven shaft and the bevel gear II to rotate while motion parameters of equipment to be detected are detected, so that the heat dissipation fan is driven to rotate to dissipate heat of each heating element in the protective shell.

Description

Technical Field

[0001] The utility model relates to the technical field of encoders, in particular to a magnetic vernier gear encoder. Background Art

[0002] In the field of modern industrial automation and precision measurement, magnetic encoders, as a key sensor component, play a vital role. They determine motion parameters such as position, speed and direction by detecting changes in magnetic fields, and are widely used in robots, CNC machine tools, servo systems, and various high-precision positioning equipment. Traditional magnetic encoders mainly rely on the interaction between magnetic materials and sensors (such as Hall effect sensors or magnetoresistors) to achieve accurate measurement of mechanical motion.

[0003] However, with the development of technology and the increase in application needs, especially in high-speed and high-load operating environments, existing magnetic encoders face a significant problem when working for a long time - heat accumulation. Since magnetic materials generate heat under the action of high-frequency magnetic fields and electronic components generate heat when processing a large number of signals, this will not only affect the measurement accuracy of the encoder, but may also shorten its service life and even cause equipment failure. In addition, under high ambient temperatures, the magnetic properties of magnetic materials are prone to change, which in turn affects the stability and accuracy of the encoded signal. Therefore, it is necessary to propose a magnetic vernier gear encoder to solve the above-mentioned problems. Utility Model Content

[0004] In view of the problems in the related art, the utility model proposes a magnetic vernier gear encoder to overcome the above technical problems existing in the existing related art.

[0005] To this end, the specific technical solutions adopted by the utility model are as follows:

[0006] A magnetic vernier gear encoder comprises a protective shell, a support plate is fixedly connected to the inner wall surface of the protective shell, a transmission bearing 1 is fixedly installed on the surface of the support plate, a rotating shaft is fixedly installed inside the transmission bearing 1, a main gear is fixedly installed on the surface of the rotating shaft, a first gear magnet is fixedly installed above the main gear, a transmission bearing 2 is rotatably installed on one side of the surface of the support plate, a vernier gear is fixedly installed inside the transmission bearing 2, the main gear is meshingly connected with the vernier gear, a second gear magnet is fixedly installed above the vernier gear, a control circuit board is fixedly installed on the surface of the support plate, a magnetic sensitive sensor is fixedly installed below the main gear and the vernier gear, the bottom of the rotating shaft passes through the transmission bearing 1 and is fixedly connected with a bevel gear 1, a positioning rod is fixedly installed on the bottom surface of the protective shell, a driven shaft is rotatably installed on one end of the positioning rod, a cooling fan is installed on one end of the driven shaft, and a bevel gear 2 is fixedly connected to the other end, and the bevel gear 1 is meshingly connected with the bevel gear 2.

[0007] Furthermore, in order to achieve protective closure of the top of the protective shell, a protective cover is fixedly installed on the top of the protective shell, and the top end of the rotating shaft rotates through the protective cover and is fixedly connected to the main shaft.

[0008] Furthermore, in order to achieve heat dissipation inside the protective shell and allow air to enter from the outside, an air inlet is opened on one side of the bottom of the protective shell, and a sealing cover is rotatably installed on one side of the surface of the air inlet.

[0009] Furthermore, in order to provide power to the electrical components in the protective housing, a power interface is fixedly installed on one side of the protective housing.

[0010] Furthermore, in order to achieve the discharge of external air after heat dissipation, heat dissipation holes are opened on the surface of the support plate, and exhaust holes are opened on the surface of the protective cover.

[0011] Furthermore, in order to reduce external electromagnetic interference when the device is in use, a filter is fixedly installed below the support plate.

[0012] Furthermore, in order to filter the outside air passing through the air inlet, a filter is fixedly installed on the inner wall of the air inlet.

[0013] The beneficial effects of the utility model are as follows: after the rotating shaft drives the main gear and the vernier gear to rotate, the magnetic field changes on the two gears are detected by the magnetic sensitive sensor, so as to realize encoding of the motion parameters of the device to be detected, and the rotating shaft drives the bevel gear one to rotate while the rotating shaft rotates, so that the bevel gear one drives the bevel gear two and the driven shaft to rotate, and then the heat dissipation fan on the driven shaft two rotates to continuously dissipate the heat generated inside the protective shell, thereby preventing the internal heat from damaging the encoder and reducing the influence of the high temperature environment on the magnetic material. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0015] Figure 1 It is a schematic diagram of the surface structure of a magnetic vernier gear encoder according to an embodiment of the utility model;

[0016] Figure 2 It is a schematic diagram of the internal structure of a protective housing in a magnetic vernier gear encoder according to an embodiment of the utility model;

[0017] Figure 3It is a side view of the internal structure of a protective housing in a magnetic vernier gear encoder according to an embodiment of the utility model;

[0018] Figure 4 It is a side view of a magnetic vernier gear encoder according to an embodiment of the utility model.

[0019] In the figure:

[0020] 1. Protective shell; 2. Support plate; 3. Transmission bearing 1; 4. Rotating shaft; 5. Main gear; 6. First gear magnet; 7. Transmission bearing 2; 8. Vernier gear; 9. Second gear magnet; 10. Control circuit board; 11. Magnetic sensor; 12. Bevel gear 1; 13. Positioning rod; 14. Driven shaft; 15. Cooling fan; 16. Bevel gear 2; 17. Protective cover; 18. Main shaft; 19. Air inlet; 20. Sealing cover; 21. Power interface; 22. Heat dissipation hole; 23. Exhaust hole; 24. Filter; 25. Filter. DETAILED DESCRIPTION

[0021] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0022] See also Figure 1-Figure 4The utility model provides a technical solution: a magnetic vernier gear encoder, comprising a metal cylindrical protective shell 1, a support plate 2 is fixedly connected to the middle position of the inner wall surface of the protective shell 1, a transmission bearing 3 is fixedly installed on the surface of the support plate 2, a rotating shaft 4 is fixedly installed inside the transmission bearing 3, a main gear 5 is fixedly installed on the surface of the rotating shaft 4, a first gear magnet 6 is fixedly installed above the main gear 5, and is used to make the main gear 5 have magnetism and magnetic poles; a transmission bearing 2 7 is rotatably installed on one side of the surface of the support plate 2, a vernier gear 8 is fixedly installed inside the transmission bearing 2 7, the main gear 5 is meshed and connected with the vernier gear 8, and the transmission ratio of the vernier gear 8 to the main gear 5 is 1:4; a second gear magnet 9 is fixedly installed above the vernier gear 8, and is used to make the vernier gear 8 have magnetism and magnetic poles; a control gear 2 is fixedly installed on the surface of the support plate 2 A magnetic sensor 11 is fixedly installed under the circuit board 10, the main gear 5 and the vernier gear 8. The magnetic sensor 11 is a Hall effect sensor, which is used to detect the changes in the electromagnetic field when the main gear 5 and the vernier gear 8 rotate. The magnetic power supply and the control circuit board 10 are electrically connected through a wire; the bottom of the rotating shaft 4 passes through the transmission bearing 13 and is fixedly connected with a bevel gear 12, and a positioning rod 13 is fixedly installed on the bottom surface of the protective shell 1. A driven shaft 14 is rotatably installed at one end of the positioning rod 13. A cooling fan 15 is installed at one end of the driven shaft 14, and a bevel gear 2 16 is fixedly connected at the other end. The bevel gear 12 is meshed with the bevel gear 2 16. When the rotating shaft 4 rotates, it drives the bevel gear 12 to rotate, and the bevel gear 12 drives the bevel gear 2 16, the driven shaft 14 and the cooling fan to rotate, thereby realizing air cooling and heat dissipation of the heat in the protective shell 1.

[0023] See also Figure 1-Figure 4A protective cover 17 is fixedly installed on the top of the protective shell 1 for sealing and protecting the top of the protective shell 1; the top of the rotating shaft 4 rotates through the protective cover 17 and is fixedly connected to a main shaft 18 for connecting the device to be detected; an air inlet 19 is opened on one side of the bottom of the protective shell 1, and a sealing cover 20 is rotatably installed on one side of the surface of the air inlet 19. After the sealing cover 20 is opened, when the cooling fan 15 rotates, the outside air is blown into the protective shell 1 through the air inlet 19 for heat dissipation; a power interface 21 is fixedly installed on one side of the protective shell 1, and the power interface 21 is electrically connected to various electrical components in the protective shell 1 through wires for connecting them and providing power; a support plate 2 is provided with heat dissipation holes 22 on its surface, and exhaust holes 23 are provided on its surface of the protective cover 17, which are used to form a passage with the air inlet 19 in the protective shell 1. After the outside air enters the protective shell 1, it passes through the protective shell 1 through the heat dissipation holes 22 and the exhaust holes 23, so as to ventilate and dissipate the heat of the interior of the protective shell 1 as a whole; a filter 24 is fixedly installed under the support plate 2, which is used to allow signals within a specific frequency range to pass through, so as to prevent the encoder from being interfered by external electromagnetic signals when working; a filter net 25 is fixedly installed on the inner wall of the air inlet 19, which is used to filter the outside air passing through the air inlet 19, so as to prevent dust from entering the protective shell 1 and affecting the internal components.

[0024] To sum up, with the aid of the above-mentioned technical scheme of the utility model, the main gear 5 and the vernier gear 8 are provided with magnetic poles with a specific arrangement through the first gear magnet 6 and the second gear magnet 9. When the rotating shaft 4 drives the main gear 5 and the vernier gear 8 to rotate, the magnetic poles will generate corresponding electrical signal changes when passing through the magnetic sensitive sensor 11, thereby encoding the motion parameters of the device to be measured. When the rotating shaft 4 rotates, the bevel gear 12 is driven to rotate. The bevel gear 12 is meshed with the bevel gear 2 16 to drive the driven shaft 14 and the cooling fan 15 on its surface to rotate, so that the cooling fan 15 pushes the outside air through the air inlet 19 to cool the inside of the protective shell 1, and the air after cooling is discharged from the heat dissipation hole 22 and the exhaust hole 23.

[0025] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A magnetic vernier gear encoder, characterized in that: The invention comprises a protective shell (1), wherein the inner wall surface of the protective shell (1) is fixedly connected to a support plate (2), a transmission bearing (3) is fixedly installed on the surface of the support plate (2), a rotating shaft (4) is fixedly installed inside the transmission bearing (3), a main gear (5) is fixedly installed on the surface of the rotating shaft (4), a first gear magnet (6) is fixedly installed above the main gear (5), a transmission bearing (7) is rotatably installed on one side of the surface of the support plate (2), a vernier gear (8) is fixedly installed inside the transmission bearing (7), the main gear (5) is meshingly connected with the vernier gear (8), and a first gear magnet (6) is fixedly installed above the vernier gear (8). A second gear magnet (9) is installed, a control circuit board (10) is fixedly installed on the surface of the support plate (2), a magnetic sensor (11) is fixedly installed below the main gear (5) and the vernier gear (8), the bottom of the rotating shaft (4) passes through the transmission bearing 1 (3) and is fixedly connected to the bevel gear 1 (12), a positioning rod (13) is fixedly installed on the bottom surface of the protective housing (1), one end of the positioning rod (13) is rotatably installed with a driven shaft (14), one end of the driven shaft (14) is installed with a cooling fan (15), and the other end is fixedly connected with the bevel gear 2 (16), and the bevel gear 1 (12) is meshingly connected with the bevel gear 2 (16).

2. A magnetic vernier gear encoder according to claim 1, characterized in that: A protective cover (17) is fixedly mounted on the top of the protective housing (1), and the top end of the rotating shaft (4) rotates through the protective cover (17) and is fixedly connected to a main shaft (18).

3. A magnetic vernier gear encoder according to claim 1, characterized in that: An air inlet (19) is provided on one side of the bottom of the protective housing (1), and a sealing cover (20) is rotatably mounted on one side of the surface of the air inlet (19).

4. A magnetic vernier gear encoder according to claim 1, characterized in that: A power interface (21) is fixedly mounted on one side of the protective housing (1).

5. A magnetic vernier gear encoder according to claim 2, characterized in that: The support plate (2) has heat dissipation holes (22) on its surface, and the protective cover (17) has exhaust holes (23) on its surface.

6. A magnetic vernier gear encoder according to claim 1, characterized in that: A filter (24) is fixedly mounted below the support plate (2).

7. A magnetic vernier gear encoder according to claim 3, characterized in that: A filter screen (25) is fixedly mounted on the inner wall of the air inlet (19).

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