Bearingless encoder

Abstract

The utility model relates to the technical field of encoders, in particular to a bearingless encoder, which comprises an encoder lower cover, the interior of the encoder lower cover is connected with a PCBA (Printed Circuit Board Assembly), the surface of the encoder lower cover is provided with a code disc, and the inner side ring of the code disc is placed on the surface of an encoder rotating shaft; the uppermost end of the encoder lower cover is connected with a PCBA, the PCBA and the encoder lower cover are mutually covered, the interior of the encoder rotating shaft is provided with a through insertion hole, the surface of the encoder lower cover is provided with a fixing rod, and the fixing rod is connected with the PCBA. And one end of the fixing rod penetrates in from one side of the encoder lower cover, penetrates through an insertion hole in the encoder rotating shaft and penetrates out from the other side of the encoder lower cover. According to the utility model, the principle that a plane is determined by points and lines is utilized, the encoder rotating shaft and the lower cover are connected and fixed through the fixing rod and the fastening screw, and after fixation, the UV glue is dispensed at the connection part of the exposed part of the fixing rod, so that the assembly is simpler, and the material cost is lower.

Description

Technical Field

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

[0002] There is a code disc inside the encoder that needs to rotate to work properly. The code disc is bonded to the encoder shaft. Usually, the shaft needs bearings to ensure stable rotation, so the encoder usually has bearings. The bearingless encoder removes the bearings on the encoder and fixes the shaft and the encoder cover together. After the encoder and the motor are installed, the encoder shaft and the motor shaft are concentrically connected, and the encoder shaft rotates normally with the help of the motor shaft bearings.

[0003] Currently, a bearingless encoder solution on the market is fixed with the help of two pins (coaxial) on the side and a black plastic part (glue) on the top. This fixing solution will result in a large number of parts (at least three), complex assembly (three glue points are required), and high material costs (two pins plus one injection molded part), which brings great troubles to people's use. Utility Model Content

[0004] The utility model aims to provide a bearingless encoder to solve the problem in the background art that the existing encoder device uses a large number of parts when fixing the rotating shaft, the assembly is complicated and the cost is high.

[0005] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a bearingless encoder, comprising an encoder lower cover, the interior of the encoder lower cover is connected to a PCBA, a code disk is arranged on the surface of the encoder lower cover, and the inner circle of the code disk is placed on the surface of the encoder shaft; the uppermost end of the encoder lower cover is connected to the PCBA, and the PCBA and the encoder lower cover cover each other, a through plug hole is opened inside the encoder shaft, a fixing rod is arranged on the surface of the encoder lower cover, and one end of the fixing rod penetrates from one side of the encoder lower cover and penetrates the plug hole inside the encoder shaft and then passes out from the other side of the encoder lower cover.

[0006] Preferably, a side hole is opened on the surface of the encoder lower cover, and a fastening screw is arranged inside the side hole.

[0007] Preferably, a locking screw hole is provided on the surface of the encoder shaft, and one end of the fastening screw passes through the side hole and is threadedly connected to the locking screw hole.

[0008] Preferably, an LED lamp is also installed inside the lower cover of the encoder, and the connection terminals of the LED lamp extend to the top of the PCBA.

[0009] Preferably, fixing screw holes are provided on the surface of the PCBA. When the PCBA is connected to the lower cover of the encoder, bolts are passed through the fixing screw holes and threadedly fixed to the lower cover of the encoder.

[0010] Compared with the prior art, the beneficial effects of the present utility model are as follows: The bearingless encoder is provided with a fixing rod and a fastening screw. During implementation, based on the principle of determining a plane by points and lines, the connection and fixation between the encoder rotating shaft and the lower cover are achieved through the fixing rod and the fastening screw. During fixation, the encoder rotating shaft remains relatively stationary by the tooling and the lower cover of the encoder. Then, the fixing rod is passed through the lower cover of the encoder, then through the encoder rotating shaft, and finally passed out through the other side of the lower cover of the encoder. After installing the fixing rod, the fastening screw is locked. After ensuring tight locking, UV glue is applied at the connection of the exposed part of the fixing rod for fixation. Therefore, the present utility model can complete the fixation of the rotating shaft with two parts, the assembly is relatively simple, and the material cost is relatively low. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 is a three-dimensional external structure schematic diagram of the present utility model;

[0012] Figure 2 is a three-dimensional sectional structure schematic diagram of the present utility model;

[0013] Figure 3 is a semi-sectional structure schematic diagram of the present utility model.

[0014] In the figure: 1. Lower cover of the encoder; 11. Side hole; 2. PCBA; 21. Fixing screw hole; 3. Fixing rod; 4. Encoder rotating shaft; 41. Insertion hole; 42. Locking screw hole; 5. Code disk; 6. LED lamp; 7. Fastening screw. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0015] The following will clearly and completely describe the technical solutions in the embodiments of the present utility model with reference to the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all of the embodiments. In addition, the terms "first", "second", "third", "upper, lower, left, right", etc. are only used for descriptive purposes and cannot be understood as indicating or implying relative importance. At the same time, in the description of the present utility model, unless otherwise clearly defined and limited, the terms "connected" and "connected" 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, an electrical connection; it can be directly connected, or indirectly connected through an intermediate medium. Based on the embodiments in the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts belong to the scope of protection of the present utility model.

[0016] The structure of a bearingless encoder provided by the present utility model is asFigure 1 and Figure 2 As shown in the figure, it includes an encoder lower cover 1. A side hole 11 is formed on the surface of the encoder lower cover 1, and a fastening screw 7 is arranged inside the side hole 11. A PCBA 2 is connected inside the encoder lower cover 1. A code disk 5 is arranged on the surface of the encoder lower cover 1, and the inner ring of the code disk 5 is placed on the surface of the encoder rotating shaft 4. A pair of locking screw holes 42 are formed on the surface of the encoder rotating shaft 4, and one end of the fastening screw 7 penetrates through the side hole 11 and is in threaded connection with the locking screw hole 42. An LED lamp 6 is also installed inside the encoder lower cover 1, and the wiring terminal of the LED lamp 6 extends above the PCBA 2.

[0017] During implementation, based on the principle that a plane is determined by points and lines, the present utility model uses a fixing rod 3 and a fastening screw 7 to realize the connection and fixation between the encoder rotating shaft 4 and the lower cover.

[0018] Furthermore, as shown in Figure 2 and Figure 3 the figure, the uppermost end of the encoder lower cover 1 is connected with a PCBA 2, and the PCBA 2 and the encoder lower cover 1 are covered with each other. Fixing screw holes 21 are formed on the surface of the PCBA 2. When the PCBA 2 is connected with the encoder lower cover 1, a bolt penetrates through the fixing screw holes 21 and is threadedly fixed with the encoder lower cover 1. A through insertion hole 41 is formed inside the encoder rotating shaft 4. A fixing rod 3 is arranged on the surface of the encoder lower cover 1, and one end of the fixing rod 3 penetrates into the encoder lower cover 1 from one side, passes through the insertion hole 41 inside the encoder rotating shaft 4, and then passes out from the other side of the encoder lower cover 1.

[0019] During implementation, the encoder rotating shaft 4 is kept relatively stationary by a tooling and the encoder lower cover 1. Then, the fixing rod 3 is passed through the encoder lower cover 1, then through the encoder rotating shaft 4, and finally passes out from the other side of the encoder lower cover 1. After installing the fixing rod 3, the fastening screw 7 is locked. After ensuring locking, UV glue is applied at the connection of the exposed part of the fixing rod 3 for fixation.

[0020] Working principle: Based on the principle that a plane is determined by points and lines, the present utility model uses a fixing rod 3 and a fastening screw 7 to realize the connection and fixation between the encoder rotating shaft 4 and the lower cover. During fixation, the encoder rotating shaft 4 is kept relatively stationary by a tooling and the encoder lower cover 1. Then, the fixing rod 3 is passed through the encoder lower cover 1, then through the encoder rotating shaft 4, and finally passes out from the other side of the encoder lower cover 1. After installing the fixing rod 3, the fastening screw 7 is locked. After ensuring locking, UV glue is applied at the connection of the exposed part of the fixing rod 3 for fixation.

[0021] For those skilled in the art, it is obvious that the present utility model is not limited to the details of the above-described exemplary embodiments, and the present utility model can be implemented in other specific forms without departing from the spirit or basic characteristics of the present utility model. Therefore, from any point of view, the embodiments should be regarded as exemplary and non-restrictive. The scope of the present utility model is defined by the appended claims rather than the above description. Therefore, all changes falling within the meaning and scope of the equivalent elements of the claims are intended to be embraced within the present utility model. Any reference signs in the claims should not be construed as limiting the claims involved.

Claims

1. A bearingless encoder, comprising an encoder lower cover (1), characterized in that: The interior of the encoder lower cover (1) is connected to the PCBA (2), the surface of the encoder lower cover (1) is provided with a code disk (5), and the inner circle of the code disk (5) is placed on the surface of the encoder shaft (4); the uppermost end of the encoder lower cover (1) is connected to the PCBA (2), and the PCBA (2) and the encoder lower cover (1) cover each other, a through plug hole (41) is opened inside the encoder shaft (4), and a fixing rod (3) is provided on the surface of the encoder lower cover (1), and one end of the fixing rod (3) penetrates from one side of the encoder lower cover (1) and penetrates the plug hole (41) inside the encoder shaft (4) and then passes out from the other side of the encoder lower cover (1).

2. A bearingless encoder according to claim 1, characterized in that: A side hole (11) is provided on the surface of the encoder lower cover (1), and a fastening screw (7) is arranged inside the side hole (11).

3. A bearingless encoder according to claim 2, characterized in that: A locking screw hole (42) is provided on the surface of the encoder shaft (4), and one end of the fastening screw (7) passes through the side hole (11) and is threadedly connected to the locking screw hole (42).

4. The bearingless encoder according to claim 1, characterized in that: An LED lamp (6) is also installed inside the encoder lower cover (1), and the connection terminals of the LED lamp (6) extend to the top of the PCBA (2).

5. The bearingless encoder according to claim 1, characterized in that: A fixing screw hole (21) is provided on the surface of the PCBA (2), and when the PCBA (2) is connected to the encoder lower cover (1), a bolt is used to penetrate the fixing screw hole (21) and is threadedly fixed to the encoder lower cover (1).

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