Ultra-thin split type encoder

Abstract

The utility model discloses an ultra-thin split type encoder, and relates to the field of encoders. The utility model discloses an ultra-thin split type encoder, which comprises an outer cover, a PCB (Printed Circuit Board) and a rotor, one end of the outer cover is open, and a step surface is arranged on the inner wall close to the open end; the PCB is bonded and fixed with the inner wall step surface through glue; the rotor comprises a code disc and a rotor support, and the code disc and the rotor support are bonded and fixed through glue. According to the technical scheme disclosed by the utility model, the purpose of miniaturization of the split type encoder is achieved by canceling size accumulation caused by mechanical locking modes such as lock plate screws and clamps.

Description

Technical Field

[0001] The utility model relates to the field of encoders, and particularly to an ultra-thin split encoder. Background Art

[0002] In the prior art, a split encoder mainly consists of components such as an outer cover, a seat body, a PCB board, a code disk, a turntable seat, and lock plate screws. The seat body and the turntable seat are provided with external interfaces and are fixed to the motor end face and the motor shaft; the PCB board is fixed on the top of the seat body through lock plate screws; the code disk and the turntable seat are bonded with glue; the inner wall of the outer cover is sleeved with the outer wall of the seat body, and does not interfere with the electronic components on the surface of the PCB board in terms of height, and the whole is fixed through fasteners.

[0003] However, the head structure of the lock plate screw is generally higher than the electronic components on the surface of the PCB board. Therefore, to avoid interference, the overall height of the outer cover increases. At the same time, to ensure the rigid fit of the thread, at least 3 complete thread turns need to be reserved in the internal thread of the seat body, and it cannot be thinned, resulting in a relatively large overall height dimension of the encoder, having the disadvantage of space layout limitations, restricting its use in specific application scenarios, and running counter to the technical trend of miniaturization, low cost, and high performance of the encoder. Summary of the Utility Model

[0004] To solve the above problems, the utility model provides an ultra-thin split encoder, including an outer cover, a PCB board, and a rotor; one end of the outer cover is open, and a stepped surface is arranged on the inner wall close to the open end; the PCB board is fixedly bonded to the inner wall stepped surface through glue; the rotor includes a code disk and a rotor support, and the code disk and the rotor support are fixedly bonded through glue.

[0005] Preferably, the rotor is arranged in the outer cover and is parallel and facing the PCB board without contact.

[0006] Preferably, both the code disk and the rotor support are of thin plate structures.

[0007] Preferably, the glue is epoxy resin glue.

[0008] Preferably, external interfaces and cable interfaces are arranged on the outer wall of the outer cover, and the positions of the external interfaces and the cable interfaces are higher than the stepped surface.

[0009] Preferably, it further includes a mechanical multi-turn module.

[0010] Preferably, the mechanical multi-turn module includes a plurality of single-turn signal acquisition modules.

[0011] Preferably, the single-turn signal acquisition module includes a gear set, a magnet, and a magnetic induction chip.

[0012] Preferably, the single-turn signal acquisition module includes a gear set and an optoelectronic pair tube.

[0013] Compared with the prior art, the advantages of the present utility model are as follows: the outer cover is compatible with the function of the seat body, and the outer cover is provided with an external interface fixed to the end face of the motor, saving material costs and reducing the size accumulation of the overall machine height; through epoxy resin glue, the PCB board is bonded to the step surface on the inner wall of the outer cover, ensuring the bonding stability of the PCB board and reducing the size accumulation caused by mechanical locking methods such as lock plate screws and clamps in the overall machine height; both the code disk and the rotor support are thin plate structures, and are bonded and flattened through epoxy resin glue, which not only improves the serious warping problem of the thin plate structure, but also makes the rotor integrally embedded inside the outer cover in the spatial layout, without causing size accumulation in the overall machine height. Description of the Drawings

[0014] Figure 1 is a schematic diagram of an ultra-thin split encoder according to an embodiment of the present utility model.

[0015] Figure 2 is an assembly schematic diagram of the outer cover and the PCB board of an ultra-thin split encoder according to an embodiment of the present utility model.

[0016] Figure 3 is a schematic diagram of the internal structure of an ultra-thin split encoder according to an embodiment of the present utility model.

[0017] Figure 4 is a schematic diagram of the mechanical multi-turn module structure of an ultra-thin split encoder according to an embodiment of the present utility model.

[0018] Figure 5 is a schematic diagram of the internal structure of the rotor of an ultra-thin split encoder according to an embodiment of the present utility model.

[0019] Description of the Reference Numerals:

[0020] 1. Outer cover; 101. Cable interface; 102. External interface; 103. Step surface; 104. Positioning hole; 2. PCB board; 3. Rotor; 301. Code disk; 302. Code disk support; 4. Mechanical multi-turn module; 401. Gear set; 402. Magnet; 403. Magnetic induction chip. Detailed Embodiments

[0021] The following further describes the present utility model in detail with reference to the attached Figure 1 - attached Figure 5 drawings.

[0022] An embodiment of the present utility model discloses an ultra-thin split encoder. Refer to Figure 1, a sunken external interface 102 and a cable interface 101 are provided on the outer cover 1. The encoder is fixed to the motor end face through the external interface 102, and the sunken design reduces the size accumulation caused by external connections.

[0023] Referring to Figure 2 , the PCB board 2 is bonded to the inner wall step surface 103 of the outer cover 1 by epoxy resin glue. The power cable passes through the cable interface 101 and is connected to the PCB board 2. Epoxy resin glue has the advantages of high bonding strength, excellent electrical insulation performance, good mechanical strength and hardness, and small shrinkage rate, etc. It ensures the bonding stability of the PCB board 2 and reduces the size accumulation caused by mechanical locking methods such as lock plate screws and clamps in the overall height of the machine.

[0024] Referring to Figure 3 , the rotor 3 is arranged inside the housing and below the PCB board 2, and is parallel and facing the PCB board 2 without contact. Both the code disk 301 and the rotor support 302 are thin plate structures and are bonded and flattened by epoxy resin glue, which improves the serious warping problem of the thin plate structure. The rotor is integrally embedded inside the outer cover in terms of spatial layout, without causing size accumulation in the overall height of the machine.

[0025] Refer to Figures 4 - 5 , the mechanical multi-turn module is arranged in the accommodation cavity formed by the PCB board 2 and the outer cover 1. The gear set 401 is initially fixed to the outer cover 1 through the hole shaft 4011 passing through the positioning hole 104 on the outer cover 1, and then the gear set 401 is stably and reliably adhesively fixed to the outer cover 1 through epoxy resin glue. A magnet 402 is placed at the end of the counting gear 4012 of the gear set 401, and the magnet 402 faces the magnetic induction chip 403 on the PCB board 2. The multi-turn counting of the encoder is realized through the magnetoelectric principle. At the same time, the gear set is a double gear, and through the radial layout with high and low levels and the tooth thickness limit design, the existing space is utilized without increasing the overall height of the machine;

[0026] The above are all preferred embodiments of the present invention, and the protection scope of the present invention is not limited hereby. Therefore, all equivalent changes made according to the structure, shape, and principle of the present invention should be covered within the protection scope of the present invention.

[0027] Although the present invention has been illustrated and described by referring to some preferred embodiments of the present invention, those of ordinary skill in the art should understand that various changes can be made in form and details without departing from the spirit and scope of the present invention.

Claims

1. An ultra-thin split encoder, characterized in that it includes a housing, a PCB board and a rotor; One end of the housing is open, and a stepped surface is provided on the inner wall near the open end; The PCB board is adhesively fixed to the stepped surface of the inner wall with glue; The rotor includes a code disc and a rotor carrier, and the code disc and the rotor carrier are adhesively fixed with glue.

2. The ultra-thin split encoder according to claim 1, characterized in that the rotor is arranged in the housing and is parallel and facing the PCB board without contact.

3. The ultra-thin split encoder according to claim 1, characterized in that both the code disc and the rotor carrier are of thin plate structure.

4. The ultra-thin split encoder according to claim 1, characterized in that the glue is epoxy resin glue.

5. The ultra-thin split encoder according to claim 1, characterized in that external interfaces and cable interfaces are provided on the outer wall of the housing, and the positions of the external interfaces and the cable interfaces are higher than the stepped surface.

6. An ultra-thin split encoder according to claim 1, characterized in that, It further includes a mechanical multi-turn module.

7. The ultra-thin split encoder according to claim 6, characterized in that the mechanical multi-turn module includes a plurality of single-turn signal acquisition modules.

8. The ultra-thin split encoder according to claim 7, wherein, The single-turn signal acquisition module includes a gear set, a magnet and a magnetic induction chip.

9. The ultra-thin split encoder according to claim 7, wherein, The single-turn signal acquisition module includes a gear set and a photoelectric pair tube.

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