An inductive encoder

Abstract

The utility model discloses an inductive encoder, comprising a shell, a rectangular shell and a circular groove shell. The rectangular shell is arranged above one side of the shell, the circular groove shell is arranged below the same side of the shell, the bottom of the rectangular shell is connected with the bottom of the circular groove shell, the top of the rectangular shell is provided with a through groove, the bottom of the through groove is fixedly connected with a circuit board, a large circular hole is arranged along the top of the bottom center of the circular groove shell, a small circular hole is arranged on the top of the large circular hole, the bottom of the small circular hole is connected with the bottom of the circuit board, a metal gear rotor is arranged at the small circular hole, the top of the metal gear rotor is connected with the bottom of the circuit board, the bottom of the metal gear rotor is embedded in the top of the motor shaft, and the surface of the motor shaft is fixedly connected to the large circular hole. The utility model has a relatively compact structure, small vertical occupancy, a relatively simple overall product structure and certain practicality.

Description

Technical Field

[0001] The utility model relates to the technical field of encoders, in particular to an inductive encoder. Background Art

[0002] The existing technology mainly uses low-cost and high-stability inductive encoder circuits. Electromagnetic waves are emitted through the LC resonant circuit, and the coil on the PCB board is used to receive the electromagnetic waves. A metal block of a fixed size is used to shield the electromagnetic waves, thereby changing the magnitude of the electromagnetic waves received by the coil, determining the relative position of the metal block, and then confirming the actual position of the motor's central axis.

[0003] As the market competition for inductive encoders becomes increasingly fierce, the size and durability of encoders play a key role in product competition. How to further reduce the space occupied by encoders is the primary problem to be solved. Utility Model Content

[0004] The purpose of the utility model is to provide an inductive encoder to solve the problems raised in the above background technology.

[0005] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0006] An inductive encoder comprises a shell, a rectangular shell and a circular groove shell, wherein a rectangular shell is arranged above one side of the shell, and a circular groove shell is arranged below the same side of the shell, the bottom of the rectangular shell is connected to the bottom of the circular groove shell, a through groove is provided at the top of the rectangular shell, a circuit board is fixedly connected to the bottom of the through groove, a large circular hole is provided along the top center of the bottom of the circular groove shell, a small circular hole is provided at the top of the large circular hole, the bottom of the small circular hole is connected to the bottom of the circuit board, a metal gear rotor is arranged at the small circular hole, the top of the metal gear rotor is connected to the bottom of the circuit board, the bottom of the metal gear rotor is embedded in the top of the motor shaft, and the surface of the motor shaft is fixedly connected to the large circular hole.

[0007] Preferably, fixing holes are provided on both sides of the top and bottom of the circular groove housing, and the interior of the fixing holes is fixedly connected to the motor housing by screws.

[0008] Preferably, a metal coil is arranged on the top of the circuit board and above the metal gear rotor.

[0009] Preferably, a layer of waterproof glue is applied on the top of the circuit board.

[0010] Preferably, a plug hole is provided at the other end of the shell, a plug connector is provided inside the plug hole, and the plug connector is electrically connected to the circuit board.

[0011] Compared with the prior art, the beneficial effects of the utility model are:

[0012] The utility model is an inductive encoder, in which a metal gear rotor is embedded above the motor shaft, and the minimum thickness can be 0.1mm, which is much smaller than the thickness of the magnet. Compared with the traditional inductive sensor, it can be greatly compressed in the vertical direction. The utility model embeds the metal gear rotor directly on the motor shaft, and a large circular hole and a small circular hole are opened in the center of the circular groove shell. The extended part of the motor shaft can extend into the sensor. The structure of the utility model is relatively compact, the vertical occupancy is small, the overall structure of the product is relatively simple, and it has certain practicality. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a front structural schematic diagram of the utility model;

[0014] Figure 2 It is a schematic diagram of an exploded view of the back structure of the utility model.

[0015] In the figure: 1. shell; 2. rectangular shell; 3. round groove shell; 4. fixing hole; 5. circuit board; 6. through slot; 7. small round hole; 8. large round hole; 9. metal gear rotor; 10. motor shaft. DETAILED DESCRIPTION

[0016] 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.

[0017] In the description of the present invention, it should be noted that the terms "vertical", "up", "down", "horizontal", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0018] In the description of the present invention, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "set", "install", "connect", and "connect" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0019] See also Figure 1-2 , the utility model provides a technical solution:

[0020] An inductive encoder comprises a shell 1, a rectangular shell 2 and a circular groove shell 3. The rectangular shell 2 is arranged above one side of the shell 1, and the circular groove shell 3 is arranged below the same side of the shell 1. The bottom of the rectangular shell 2 is connected to the bottom of the circular groove shell 3. A through groove 6 is provided at the top of the rectangular shell 2. A circuit board 5 is fixedly connected to the bottom of the through groove 6. A large circular hole 8 is provided along the top center of the bottom of the circular groove shell 3. A small circular hole 7 is provided at the top of the large circular hole 8. The bottom of the small circular hole 7 is connected to the bottom of the circuit board 5. A metal gear rotor 9 is arranged at the small circular hole 7. The top of the metal gear rotor 9 is connected to the bottom of the circuit board 5. The bottom of the metal gear rotor 9 is embedded in the top of a motor shaft 10. The surface of the motor shaft 10 is fixedly connected to the large circular hole 8.

[0021] Furthermore, fixing holes 4 are provided on both sides of the top and bottom of the circular groove housing 3, and the inside of the fixing holes 4 is fixedly connected to the motor housing by screws.

[0022] Furthermore, a metal coil is arranged on the top of the circuit board 5 and above the metal gear rotor 9 .

[0023] Specifically, according to the working principle of the inductive encoder, the closer the metal gear rotor 9 is to the inductive coil on the circuit board 5, the better the effect, so the metal coil is arranged as described above.

[0024] Furthermore, a layer of waterproof glue is applied on the top of the circuit board 5, and the function of the waterproof glue is to waterproof the circuit board.

[0025] Furthermore, a socket is formed at the other end of the housing 1 , a connector is disposed inside the socket, and the connector is electrically connected to the circuit board 5 .

[0026] Specifically, the utility model leads out signals through a plug connector, wherein the connection method between the plug connector and the circuit board 5 uses existing mature technology, and its specific structure and circuit diagram will not be described in detail again.

[0027] Working principle: The utility model is an inductive encoder, in which a metal gear rotor 9 is embedded above the motor shaft 10, and the thickness can be as low as 0.1 mm, which is much smaller than the thickness of the magnet. Compared with the traditional inductive sensor, it can be greatly compressed in the vertical direction. The utility model embeds the metal gear rotor 9 directly on the motor shaft 10, and a large circular hole and a small circular hole are opened in the center of the circular groove shell 3. The extended part of the motor shaft 10 can extend into the interior of the sensor. The structure of the utility model is relatively compact, the vertical occupancy is small, the overall structure of the product is relatively simple, and it has certain practicality.

[0028] Although the embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. An inductive encoder, comprising a housing (1), a rectangular housing (2), and a circular groove housing (3), characterized in that: A rectangular shell (2) is arranged above one side of the shell (1), and a circular groove shell (3) is arranged below the same side of the shell (1); the bottom of the rectangular shell (2) is connected to the bottom of the circular groove shell (3); a through groove (6) is provided at the top of the rectangular shell (2); a circuit board (5) is fixedly connected to the bottom of the through groove (6); a large circular hole (8) is provided along the top center of the bottom of the circular groove shell (3); a small circular hole (7) is provided at the top of the large circular hole (8); the bottom of the small circular hole (7) is connected to the bottom of the circuit board (5); a metal gear rotor (9) is arranged at the small circular hole (7); the top of the metal gear rotor (9) is connected to the bottom of the circuit board (5); the bottom of the metal gear rotor (9) is embedded in the top of the motor shaft (10); and the surface of the motor shaft (10) is fixedly connected to the large circular hole (8).

2. An inductive encoder according to claim 1, characterized in that: The top and bottom sides of the circular groove housing (3) are provided with fixing holes (4), and the interior of the fixing holes (4) is fixedly connected to the motor housing by means of screws.

3. The inductive encoder according to claim 1, characterized in that: A metal coil is arranged on the top of the circuit board (5) and above the metal gear rotor (9).

4. The inductive encoder according to claim 1, characterized in that: A layer of waterproof glue is applied on the top of the circuit board (5).

5. The inductive encoder according to claim 1, characterized in that: The other end of the housing (1) is provided with a plug hole, a plug connector is arranged inside the plug hole, and the plug connector is electrically connected to the circuit board (5).

Images