CN209046467U - Encoder - Google Patents

Abstract

The utility model provides a kind of encoder, including encoder main body, first bearing, second bearing, first axle and the second axis, wherein: the encoder main body includes having the spacer ring being fixed on the encoder main body in the inner cavity of the encoder main body, the inner cavity；The first bearing and second bearing are installed in the inner cavity of the encoder main body respectively, and the first bearing is located at the first side of the spacer ring, the second bearing is located at second side of the spacer ring；The tail end of the first axle is inserted into the inner cavity from the first side of the encoder main body, and the head end of second axis is inserted into the inner cavity from second side of the encoder main body；The head end of the tail end of the first axle and the second axis is connected fixation in a manner of concentric.The utility model limits the first axle of separate structure and the axial movement of the second axis by being set to the spacer ring of inner cavity, can be effectively prevented due to causing encoder to take off axis when transmission shaft and encoder axis decentraction installation.

Description

Encoder

Technical field

The utility model relates to motor feedback devices, more specifically to a kind of encoder.

Background technique

Encoder is widely used in industrial automation equipment, and for carrying out angle, speed, position feedback.Encoder Belong to high-precision sensor, requires each tolerance chain extremely stringent when producing installation, to ensure the precision of encoder.But encoder The occasion of work is varied, and in the client using encoder, the size of the installation site of encoder sometimes also can not be very Good guarantee is often difficult to ensure particularly with encoder axis and the concentricity of installation equipment transmission shaft.

As shown in Figs. 1-2, existing encoder generally uses shaft 12.It, first will be by 13 He of first bearing in assembling The inner cavity 111 of encoder main body 11 is installed and be adhered to the duplex bearing that second bearing 14 is constituted from the bottom end of encoder main body 11, And the bearing clearance between first bearing 13 and second bearing 14 is carried out using gasket 15 and is eliminated；Bearing is eliminated clearance and is adhered to Behind the inner cavity 111 of encoder main body 11, then shaft 12 passed through into first bearing 13 and second bearing 14 simultaneously from 11 top of main body It is adhered to the inner ring of two bearings.

However, due to above-mentioned shaft 12 and the decentraction of equipment transmission shaft and Hard link, being compiled in encoder in-site installation The axial component of the shaft 12 of code device can generate a power outwardly or inwardly.In encoder operational process, above-mentioned one Axial force suffered by axis 12 will lead to shaft 12 and take off axis after running for a period of time.This will cause encoder shaft end to be bonded Code-disc and photronic gap are suddenly big or suddenly small, and cause encoder output unstable, influence the precision of encoder.Serious When, de- axis will will cause code-disc and contact with photocell, to damage code-disc code channel, and encoder be caused thoroughly to damage.

Utility model content

The technical problem to be solved by the present invention is to be easy de- axis for above-mentioned encoder and influence encoder accuracy The problem of, a kind of new encoder is provided.

The technical solution that the utility model solves above-mentioned technical problem is to provide a kind of encoder, including encoder main body, First bearing, second bearing, first axle and the second axis, in which: the encoder main body includes running through the encoder main body Inner cavity, there is the spacer ring being fixed on the encoder main body, and the internal diameter of the spacer ring is less than described the in the inner cavity The diameter of one bearing and the outer ring of second bearing；The first bearing and second bearing are installed in the encoder main body respectively Inner cavity, and the first bearing is located at the first side of the spacer ring, the second bearing is located at second side of the spacer ring；It is described With having the second blocking portion, and the ruler of the periphery of first blocking portion on the first blocking portion, second axis in first axle The size of the diameter of the very little inner ring greater than the first bearing, the periphery of second blocking portion is greater than the interior of the second bearing The diameter of ring；The tail end of the first axle is inserted into the inner cavity and first blocking portion from the first side of the encoder main body Be affixed on the upside of the first bearing, the head end of second axis from second side of the encoder main body be inserted into the inner cavity and Second blocking portion is affixed on the downside of the second bearing；The head end of the tail end of the first axle and the second axis is with concentric side Formula connects fixation, and prevents the first axle and the second axis from described the by first blocking portion and second blocking portion The abjection of the inner ring of one bearing and second bearing.

In encoder described in the utility model, the spacer ring and encoder main body one.

In encoder described in the utility model, the first axle includes the mounting hole being axially arranged, and the installation There is fixed ring in hole；The head end of second axis has inserting section, the installation of the diameter of the inserting section and the first axle The diameter matches in hole, and have opening positioned at the first internal thread hole of the end face of its head end on second axis；Second axis Inserting section be inserted into the mounting hole of the first axle, and second axis passes through the fixed ring and screw thread for passing through the first axle The screw and the first axle for being connected to first internal thread hole are fixed.

In encoder described in the utility model, the tail end of the first axle has the second internal thread hole, and described second The head end of axis has external thread section corresponding with second internal thread hole, and the first axle and the second axis pass through described second Internal thread hole and external thread section are threadedly coupled.

In encoder described in the utility model, the diameter of the end face of the tail end of the first axle is greater than the first axle The diameter for the inner ring held, and first blocking portion is made of the end face edge of the tail end of the first axle.

In encoder described in the utility model, second blocking portion is by baffle ring structure outstanding on second axis At, and the baffle ring is perpendicular to the axle center of second axis.

In encoder described in the utility model, the length of the inserting section of second axis is less than first internal screw thread The depth in hole.

In encoder described in the utility model, the first bearing and second bearing respectively with the encoder main body It is adhesively fixed.

In encoder described in the utility model, the head end of the tail end of the first axle and the second axis passes through interference fit Mode connects fixation.

In encoder described in the utility model, the head end of the tail end of the first axle and the second axis passes through bonding way Connect fixation.

The encoder of the utility model, which has the advantages that, limits separate structure by the spacer ring for being set to inner cavity The axial movement of first axle and the second axis can be effectively prevented due to causing to encode when transmission shaft is installed with encoder axis decentraction Device takes off axis, improves the reliability of encoder.The utility model can also save the maintenance cost of encoder.

Detailed description of the invention

Fig. 1 is the decomposition texture schematic diagram of existing encoder；

Fig. 2 is the decomposition diagram of the section of existing encoder；

Fig. 3 is the decomposition diagram of the utility model encoder embodiment；

Fig. 4 is the decomposition diagram of the section of the utility model encoder embodiment.

Specific embodiment

In order to make the purpose of the utility model, technical solutions and advantages more clearly understood, below in conjunction with attached drawing and implementation Example, the present invention will be further described in detail.It should be appreciated that specific embodiment described herein is only used to explain The utility model is not used to limit the utility model.

It as shown in Figure 3-4, is the schematic diagram of the utility model encoder embodiment, which can be used for motor, go forward side by side Row angle, speed, position feedback.The encoder of the present embodiment include encoder main body 31, first bearing 32, second bearing 33, First axle 34 and the second axis 35.Above-mentioned encoder main body 31 includes inner cavity 311, and the inner cavity 311 axially penetrates through encoder master Body 31 has the spacer ring 312 being fixed on encoder main body 31 in above-mentioned inner cavity 311, and the internal diameter of spacer ring 312 is less than first The diameter of bearing 32 and second bearing 33 (spacer ring 312, first bearing 32, second bearing 33 are coaxial).First bearing 32 and second Bearing 33 is installed in the inner cavity 311 of encoder main body 31 respectively, and first bearing 32 is located at the first side of spacer ring 312, the second axis It holds 33 and is located at second side of spacer ring 312 (since the internal diameter of spacer ring 312 is less than the straight of the outer ring of first bearing 32 and second bearing 33 Diameter, therefore first bearing 32 and second bearing 33 can not be across spacer rings 312).Also, to avoid first bearing 32 and second bearing 33 vibration, above-mentioned first bearing 32 and second bearing 33 are adhesively fixed with encoder main body 31 respectively.

With having the second blocking portion, and the periphery of the first blocking portion on the first blocking portion, the second axis 35 in first axle 34 Size be greater than first bearing 32 inner ring diameter, the size of the periphery of the second blocking portion is greater than the inner ring of second bearing 33 Size.The tail end of first axle 34 is inserted into inner cavity 311 from the first side of encoder main body 31 and the first blocking portion is affixed on first bearing The head end of 32 upside, the second axis 35 is inserted into inner cavity 311 from second side of encoder main body 31 and the second blocking portion is affixed on second The downside of bearing 33.The head end of the tail end of first axle 34 and the second axis 35 is connected fixation in a manner of concentric, to form coding The shaft of device.

In above-mentioned encoder, the axial direction of first bearing 32 and second bearing 33 is limited by the spacer ring 312 in inner cavity 311 It is mobile, and by the axial movement of first bearing 32 and second bearing 33 limitation first axle 34 and the second axis 35, can effectively it prevent Only due to causing encoder to take off axis when transmission shaft and the decentraction of encoder shaft are installed, the reliability of encoder is improved.

Particularly, it is the stability for improving spacer ring 312,31 one of spacer ring 312 and encoder main body can be made.Certainly, in reality In the application of border, spacer ring 312 can also be otherwise secured on encoder main body 31, such as by being interference fitted, being bonded.

The head end of the tail end of above-mentioned first axle 34 and the second axis 35 can be fixed mutually in the following manner: set in first axle 34 Axial mounting hole 341 is set, and there is fixed ring 342 in the mounting hole 341；In the head end of the second axis 35, inserting section 351 is set, The diameter matches of the mounting hole 341 of the diameter and first axle 34 of the inserting section 351, and on the second axis 35 there is opening to be located at second First internal thread hole 352 (such as M2 threaded hole) of the end face of the head end of axis；The inserting section 351 of second axis 35 is inserted into first axle 34 mounting hole 341, and the second axis 35 is by passing through the fixed ring 342 of first axle 34 and being threadedly coupled to the first internal thread hole 352 screw (such as M2 screw) and first axle 34 is fixed.Also, first bearing 32 can be carried out by the progress of driving screws Clearance between second bearing 33 is eliminated.

Particularly, for convenient for the clearance between first bearing 32 and second bearing 33, the inserting section 351 of above-mentioned second axis 35 Depth of the length less than the first internal thread hole 352.

In addition, the head end of the tail end of above-mentioned first axle 34 and the second axis 35 can also be fixed mutually in the following manner: first The second internal thread hole is arranged in the tail end of axis 34, and the head end of the second axis 35 has external thread section corresponding with the second internal thread hole, and First axle 34 and the second axis 35 are threadedly coupled by the second internal thread hole and external thread section.In practical applications, first axle 34 The head end of tail end and the second axis 35 can also be connected fixation by interference fit type, or be connected by bonding way fixed etc..

In a particular application, the diameter of the end face of the tail end of first axle 34 is greater than the diameter of the inner ring of first bearing 32, and First blocking portion is made of the end face edge of the tail end of first axle 34.Correspondingly, the second blocking portion on the second axis 35 can be by The composition of baffle ring 353 outstanding on two axis 35, and baffle ring 353 is perpendicular to the axle center of the second axis 35.

The preferable specific embodiment of the above, only the utility model, but the protection scope of the utility model is not It is confined to this, anyone skilled in the art within the technical scope disclosed by the utility model, can readily occur in Change or replacement, should be covered within the scope of the utility model.Therefore, the protection scope of the utility model should It is subject to the protection scope in claims.

Claims (10)

1. a kind of encoder, which is characterized in that including encoder main body, first bearing, second bearing, first axle and second Axis, in which: the encoder main body includes having to be fixed on the volume in the inner cavity of the encoder main body, the inner cavity Spacer ring in code device main body, and the internal diameter of the spacer ring is less than the diameter of the outer ring of the first bearing and second bearing；It is described First bearing and second bearing are installed in the inner cavity of the encoder main body respectively, and the first bearing is located at the spacer ring First side, the second bearing are located at second side of the spacer ring；There is the first blocking portion, second axis in the first axle It is upper that there is the second blocking portion, and the size of the periphery of first blocking portion is greater than the diameter of the inner ring of the first bearing, institute State the periphery of the second blocking portion size be greater than the second bearing inner ring diameter；The tail end of the first axle is from the volume First side of code device main body is inserted into the inner cavity and first blocking portion is affixed on the upside of the first bearing, second axis Head end be inserted into the inner cavity from second side of the encoder main body and second blocking portion is affixed on the second bearing Downside；The head end of the tail end of the first axle and the second axis is connected fixation in a manner of concentric, and passes through first blocking portion The first axle and the second axis is prevented to deviate from from the inner ring of the first bearing and second bearing with second blocking portion.

2. encoder according to claim 1, which is characterized in that the spacer ring and encoder main body one.

3. encoder according to claim 1, which is characterized in that the first axle includes the mounting hole being axially arranged, and There is fixed ring in the mounting hole；The head end of second axis has inserting section, the diameter of the inserting section and described first The diameter matches of the mounting hole of axis, and there is opening spiral shell in the first of the end face of the second axis head end on second axis Pit；The inserting section of second axis is inserted into the mounting hole of the first axle, and second axis is by passing through described first The fixed ring of axis is simultaneously threadedly coupled to the screw of first internal thread hole and the first axle is fixed.

4. encoder according to claim 1, which is characterized in that the tail end of the first axle has the second internal thread hole, The head end of second axis has external thread section corresponding with second internal thread hole, and the first axle and the second axis pass through Second internal thread hole and external thread section are threadedly coupled.

5. encoder according to claim 3 or 4, which is characterized in that the diameter of the end face of the tail end of the first axle is big In the diameter of the inner ring of the first bearing, and first blocking portion is made of the end face edge of the tail end of the first axle.

6. encoder according to claim 3 or 4, which is characterized in that second blocking portion on second axis by dashing forward Baffle ring out is constituted, and the baffle ring is perpendicular to the axle center of second axis.

7. encoder according to claim 3, which is characterized in that the length of the inserting section of second axis is less than described the The depth of one internal thread hole.

8. encoder according to claim 1, which is characterized in that the first bearing and second bearing respectively with the volume Code device main body is adhesively fixed.

9. encoder according to claim 6, which is characterized in that the head end of the tail end of the first axle and the second axis passes through Interference fit type connects fixation.

10. encoder according to claim 6, which is characterized in that the head end of the tail end of the first axle and the second axis is logical Bonding way is crossed to connect fixation.