CN110943580A - Encoder assembly - Google Patents

Abstract

The utility model provides an encoder subassembly to solve the big axle sleeve formula encoder of current cavity type and adopt axle sleeve and grating dish lug connection, along with the motor shaft becomes thick and cause component specifications such as grating dish big, the encoder specification of selecting for use just is big more, leads to the higher price of cost to be expensive. And, for some motors with large shaft running quantity, the problem of encoder damage is easily caused. The invention comprises a first gear, a second gear, a shell and an encoder; the center of the first gear is provided with a mounting hole, the first gear is rotatably arranged in the shell, the encoder is fixed in the shell, the shaft of the encoder is fixed with the second gear, the first gear is meshed with the second gear, and a lead on the encoder extends out of the shell. The invention has the characteristics of low failure rate, low cost and strong universality. The present invention can be used with smaller encoders connected to larger diameter motor shafts.

Description

Encoder assembly

Technical Field

The invention relates to an encoder transmission device, in particular to an encoder assembly.

Background

An encoder is a device that compiles, converts, and/or formats signals or data into a form of signals that can be used for communication transmission and storage. The motor protection device is applied to a motor, can be used for detecting whether the motor runs according to the direction and the rotating speed of system design, and plays a role in monitoring and protecting. In recent years, in the motor ordering products of our company, products with an encoder and a brake or an overspeed switch are required to be increased gradually, and in such a case, a hollow large-shaft sleeve type encoder needs to be selected as the motor encoder, so that a small shaft is reserved after the encoder is linked to realize linkage with the brake or the overspeed switch.

At present, the structure of the existing hollow large-sleeve encoder on the market is that the shaft sleeve is directly connected with the grating disc on the encoder, the larger the required shaft hole is, the larger the specifications of elements such as the grating disc matched with the shaft hole are, the larger the specification of the selected encoder is, and the higher cost and the higher price are caused. And, because some motors self reasons can produce great axle float volume at the rotation in-process, motor shaft directly links or passes through the coupling joint with the encoder, and motor shaft and encoder all are on same axis, and the float of motor all influences the encoder greatly, leads to the encoder fault rate higher.

Disclosure of Invention

The present invention provides an encoder assembly to solve the above problems.

The technical scheme adopted by the invention for solving the technical problems is as follows:

an encoder assembly includes a first gear, a second gear, a housing, and an encoder;

the center of the first gear is provided with a mounting hole, the first gear is rotatably arranged in the shell, the encoder is fixed in the shell, the shaft of the encoder is fixed with the second gear, the first gear is meshed with the second gear, and a lead on the encoder extends out of the shell.

Compared with the prior art, the invention has the following beneficial effects:

first, the first gear and the second gear of the invention drive and replace the original connection structure of the grating disk and the shaft sleeve, because the acting force of the motor shaft does not act on the shaft of the encoder directly during operation, but acts on the shell through the first gear, the phenomenon that the encoder is damaged due to the acting force during operation is avoided, and the failure rate of the encoder is reduced.

For a thicker motor shaft, the invention can adopt a smaller grating disc to be connected with the motor shaft in a gear transmission mode, thus being beneficial to reducing the cost and having strong universality.

Drawings

FIG. 1 is a schematic of the present invention.

Detailed Description

Example 1: as shown in fig. 1, an encoder assembly of the present embodiment includes afirst gear 1, asecond gear 2, ahousing 3, and anencoder 4;

processing has the mounting hole in the center offirst gear 1, andfirst gear 1 rotates and sets up inshell 3, andencoder 4 is fixed in the shell, is fixed withsecond gear 2 onencoder 4's the axle, andfirst gear 1 and 2 intermeshing of second gear, wire on theencoder 4 stretch out fromshell 3.

In this embodiment, thefirst gear 1 and thesecond gear 2 may be made of stainless steel, and are applied to the harsh environment, so as to improve the corrosion resistance.

Example 2: as shown in fig. 1, the present embodiment is different fromembodiment 1 in that: in the embodiment, two side surfaces of thefirst gear 1 are respectively provided with a cylindrical boss 1-1 concentric with the axis of thefirst gear 1, each cylindrical boss 1-1 is provided with abearing 5, and eachbearing 5 is arranged inside theshell 3 and matched with theshell 3.

In the embodiment, a threaded hole penetrating through the mounting space of thefirst gear 1 is processed on the cylindrical boss 1-1 of thefirst gear 1, ajackscrew 6 is arranged in the threaded hole, and thejackscrew 6 is used for fixing a motor shaft.

In the embodiment, a key groove can be processed in the mounting hole of thefirst gear 1, and the first gear is manufactured into a hub form to transmit torque with a motor shaft in a key connection mode.

Thehousing 3 ofembodiments 1 and 2 may be provided with a mounting tab for securing thehousing 3 to the device.

Example 3: the present embodiment is different fromembodiment 2 in that: theshell 3 in this embodiment can be further processed with a cylindrical positioning boss and a flange, the cylindrical positioning boss and the flange are concentrically arranged, and therefore the purpose of setting is convenient for a user to ensure concentricity of the motor shaft and thefirst gear 1 when the user is connected with equipment through the flange, so as to ensure installation accuracy.

Claims (5)

1. An encoder assembly, characterized by: the device comprises a first gear (1), a second gear (2), a shell (3) and an encoder (4);

processing has the mounting hole in the center of first gear (1), and first gear (1) rotates and sets up in shell (3), and encoder (4) are fixed in the shell, are fixed with second gear (2) on the axle of encoder (4), and first gear (1) and second gear (2) intermeshing, and wire on encoder (4) stretches out from shell (3).

2. The encoder assembly of claim 1, wherein: two side surfaces of the first gear (1) are respectively provided with a cylindrical boss (1-1) concentric with the axis of the first gear (1), each cylindrical boss (1-1) is provided with a bearing (5), and each bearing (5) is arranged inside the shell (3) and matched with the shell (3).

3. The encoder assembly of claim 2, wherein: a threaded hole which is communicated with the mounting space of the first gear (1) is processed on the cylindrical boss (1-1) of the first gear (1), and a jackscrew (6) is arranged in the threaded hole.

4. The encoder assembly of claim 1, wherein: a key groove for connecting a motor shaft is processed on the mounting hole of the first gear (1).

5. The encoder assembly of any of claims 1-4, wherein: it also comprises a connecting sheet (7) for mounting;

the connecting piece (7) is fixed on the shell (3).

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