CN207946109U - A kind of encoder eliminated output shaft and swung - Google Patents

Abstract

The utility model proposes a kind of encoders that elimination output shaft is swung, and solve the problems, such as that the circular runout of encoder bearing causes output shaft to swing in the prior art；Including code main body, bearing and output shaft, further include：Limits device for limiting output shaft swing, is threaded through on output shaft；Block for limiting limits device, is threaded through on output shaft；The utility model proposes the encoder that swings of elimination output shaft so that improve the precision used, eliminate due to the error that output shaft is swung and is generated.

Description

A kind of encoder eliminated output shaft and swung

Technical field

The utility model is related to measuring apparatus fields, particularly relate to a kind of encoder that elimination output shaft is swung.

Background technology

Encoder is the operations such as angle signal or angular displacement signal are converted to electric signal, and encoded, are communicated one Kind sensor.

What the output valve of encoder was directly reacted is the angle (incremental encoder) that encoder output shaft rotation is crossed or this moment Corresponding angle value (absolute type encoder), it is common that these values are easily converted to displacement of the lines, linear velocity, angular speed or rotating speed etc. Physical parameter, such as the operation principle of rice counting wheel is exactly angular displacement according to encoder output, in conjunction with the diameter of rice counting wheel, The distance that rice counting wheel is passed by is calculated, completes to measure mileage；

Encoder in the prior art, there are two types of form from export structure, when hollow type, second is that output shaft type, It is middle output shaft type encoder occupied most markets, be widely used it is general, shown in following Fig. 1；And the output of encoder It is to be connected by double deep groove ball bearing between axis and encoded body；The advantages of deep groove ball bearing is that damping is small, limit speed is high, The case where being adapted to high-speed rotation, the disadvantage is that will produce circular runout, such as Fig. 2 causes to compile due to the circular runout of bearing Code device output shaft generates swing in rotation, and axial line is in an angle theta with horizontal direction；

Since output shaft caused by bearing circular runout is swung, use of the encoder in high-precision, example can be influenced If the output shaft of the rice counting wheel in Fig. 3, encoder passes through rice counting wheel centre bore, when the swing angle of encoder output axis is θ, The drift angle of rice counting wheel vertical direction is also θ, and the true rolling radius of rice counting wheel is L R × cos θ at this time, and wherein R is rice counting wheel Radius, it can be seen that the rolling radius L of rice counting wheel than it is vertical when rolling radius R become smaller, so record mileage precision meeting It is affected.

In addition to this, it is more to cause bearing to generate the factor of circular runout, and such as verticality of inside and outside circle, thickness becomes The many factors such as the circularity and radial internal clearance of momentum or ball, and with the use of bearing, the mill of Internal and external cycle and ball Consumption can increase radial internal clearance, can also aggravate the circular runout of bearing, cause the oscillating quantity of output shaft also increasing.

Therefore, being badly in need of one kind can use in the encoder, eliminate the device of encoder bearing circular runout.

Utility model content

The utility model proposes a kind of encoders that elimination output shaft is swung, and solve encoder bearing diameter in the prior art The problem of causing output shaft to swing to bounce.

What the technical solution of the utility model was realized in：

A kind of encoder eliminated output shaft and swung, including：Encoded body, bearing and output shaft further include：

Limits device for limiting output shaft swing, is threaded through on output shaft；

Block for limiting limits device, is threaded through on output shaft.

As further technical solution, limits device includes：

First washer is arranged on encoded body；

Ball layer is disposed adjacent with the first washer；

Second packing ring is disposed adjacent with ball layer.

Preferably, block is T shape blocks, and one end of block is arranged in limiting device.

Preferably, block and the seamless connection of output shaft.

Technical solutions of the utility model in one end of encoded body by being provided with limits device, and the limits device is worn On output shaft, by the limit of block, and by the cooperation of block and limits device, limitation output shaft that can be preferential makes The problem of being swung during can also pass through the cooperation of limits device and block even if circular runout occurs in bearing Further limitation output shaft, and then the precision used is improved, it eliminates due to the error that output shaft is swung and is generated.

Description of the drawings

In order to illustrate the embodiment of the utility model or the technical proposal in the existing technology more clearly, below will be to embodiment Or attached drawing needed to be used in the description of the prior art is briefly described, it should be apparent that, the accompanying drawings in the following description is only It is some embodiments of the utility model, for those of ordinary skill in the art, in the premise not made the creative labor Under, other drawings may also be obtained based on these drawings.

Fig. 1 is the structural schematic diagram of encoder in the prior art；

Fig. 2 is the structural schematic diagram of another state of encoder in the prior art；

Fig. 3 is the structural schematic diagram of encoder use state in the prior art；

Fig. 4 is the structural schematic diagram that the encoder that output shaft is swung is eliminated in the utility model.

In figure：

1, encoded body；2, bearing；3, output shaft；4, limits device；41, the first washer；42, ball layer；43, the second pad Circle；6, block.

Specific implementation mode

The following will be combined with the drawings in the embodiments of the present invention, carries out the technical scheme in the embodiment of the utility model Clearly and completely describe, it is clear that the described embodiments are only a part of the embodiments of the utility model, rather than whole Embodiment.Based on the embodiments of the present invention, those of ordinary skill in the art are without creative efforts The every other embodiment obtained, shall fall within the protection scope of the present invention.

As shown in figure 4, the utility model proposes a kind of elimination output shaft swing encoder, including：Encoded body 1, Bearing 2 is arranged in encoded body 1, and output shaft 3 is connect across bearing 2 with encoded body 1；Limits device 4 is threaded through output shaft 3 On, and one end is connect with encoded body 1, is swung by limits device 4 to limit output shaft 3, block 5 is threaded through on output shaft 3, In the utility model, for ensure 4 each tight ness rating of limits device, and ensure output shaft 3 be not in swing, preferred block 5 with 3 seamless connection of output shaft；

Wherein, limits device 4 includes：First washer 41, ball layer 42 and second packing ring 43, first washer 41 setting exist On encoded body 1；Ball layer 42 is disposed adjacent with the first washer 41；Second packing ring 43 is disposed adjacent with ball layer 42；And at this In utility model, block 5 is T shapes block 5, and one end of block 5 is arranged in limiting device；Pass through block 5 and output shaft 3 Cooperation to limit the tight ness rating between the first washer 41, ball layer 42 and second packing ring 43, and then coordinates block 5 to limit simultaneously Output shaft 3 avoids output shaft 3 from generating swing during use；In the utility model, the first washer 41,42 and of ball layer Second packing ring 43 forms plain thrust bearing 2 after combining；

Specifically, the first washer 41 is on the end face of encoded body 1, second packing ring 43 thinks the first washer by block 5 The 41 left extruding in place side connect with output shaft 3 since gear is seamless, can ensure the first washer 41, ball layer 42 and second Gap between washer 43 reduces, and block 5 is closely connect with output shaft 3；Wherein, block 5 is squeezed to 41 place side of the first washer Pressure needs enough load, can eliminate the gap between the first washer 41, ball layer 42 and second packing ring 43；And 5 nothing of block Gap is connect with output shaft 3, it is also desirable to enough load, and enough frictional force is provided, when preventing limitation second packing ring 43 The reaction force being generated pushes block 5；

By above structure ensure the first washer 41, ball layer 42, second packing ring 43 and block 5 with encoded body 1 End face is parallel, and the first washer 41, ball layer 42 and second packing ring 43 compress gapless, at the same block 5 by centre bore with Output shaft 3 is seamlessly connected, and output shaft 3 is caused to keep vertical with block 5, is also therebetween gapless tight fit, and then realize 3 encoded body of output shaft, 1 end face it is vertical, when output shaft 3 rotates, block 5 can be driven to rotate, block 5 and encoded body 1 it Between the first washer 41, ball layer 42 and second packing ring 43 compressed, it is very close to each other, therefore will not be produced in rotary course Raw bounce, so the final swing for eliminating output shaft 3.

The above is only the preferred embodiments of the present utility model only, is not intended to limit the utility model, all in this practicality Within novel spirit and principle, any modification, equivalent replacement, improvement and so on should be included in the guarantor of the utility model Within the scope of shield.

Claims (3)

1. a kind of encoder eliminated output shaft and swung, including：Encoded body (1), bearing (2) and output shaft (3), feature exists In further including：

Limits device for limiting the output shaft (3) swing, is threaded through on the output shaft (3)；Including the first washer (41), it is arranged on the encoded body (1)；Ball layer (42) is disposed adjacent with first washer (41)；Second packing ring (43), it is disposed adjacent with the ball layer (42)；

Block (5) for limiting the limits device, is threaded through on the output shaft (3).

2. eliminating the encoder that output shaft is swung as described in claim 1, which is characterized in that the block (5) is T shape blocks (5), and one end of the block (5) is arranged in limiting device (4).

3. as described in claim 1 eliminate output shaft swing encoder, which is characterized in that the block (5) with it is described defeated Shaft (3) seamless connection.