Encoder with shell and coded disc assembly in flexible connection

Abstract

The utility model discloses an encoder with a housing and a code disc assembly in flexible connection, which comprises the housing and the code disc assembly, the middle part of the code disc assembly is provided with an axially penetrating rotating shaft, the outer side of the bottom of the code disc assembly is uniformly provided with four lug seats along the circumference, four upward penetrating screws are inserted into the bottom of the housing, and the bottom of the code disc assembly is provided with a nut. The upper ends of the screws are in one-to-one corresponding threaded connection with the lugs, and the outer sides of the screws are flexibly connected with the shell through elastic components. According to the utility model, the code disc assembly and the housing are connected in a flexible manner, so that damage caused by radial run-out in the use process is reduced, and the service life of the encoder is prolonged.

Description

Technical Field

[0001] The utility model relates to the technical field of encoders, in particular to an encoder with a flexible connection between a housing and a code disc assembly. Background Technique

[0002] In the existing encoder, the housing and the code disc assembly are rigidly connected. When the rotating shaft on the code disc assembly of the encoder is connected to the rotating shaft of a motor or other device to be measured, and the encoder is fixed to the housing of the motor or the device to be measured through a connecting rod, due to the existence of radial, installation cumulative errors of the motor shaft and accessory dimension errors, a reciprocating impact will be generated on the housing of the encoder during operation, causing the code disc assembly to be subjected to corresponding tensile or compressive forces, and bearings or other components in the code disc assembly will be damaged during operation, affecting the service life of the encoder. Content of the Utility Model

[0003] The purpose of the utility model is to provide an encoder with a flexible connection between a housing and a code disc assembly to solve the problems raised in the above background technique.

[0004] To achieve the above purpose, the utility model provides the following technical solution: an encoder with a flexible connection between a housing and a code disc assembly, including a housing and a code disc assembly. An axially penetrating rotating shaft is arranged in the middle of the code disc assembly. Four ear seats are evenly arranged along the circumference on the outer side of the bottom of the code disc assembly. Four upward-penetrating screws are inserted into the bottom of the housing, and the upper ends of the screws are screwed to the ear seats one by one. A flexible connection is realized between the outer side of the screws and the housing through an elastic component.

[0005] Preferably, an end cover is fixedly installed at the port of the housing.

[0006] Preferably, the housing is fixedly installed with a Z-shaped bracket, and the bracket is installed with a connecting rod through a bolt.

[0007] Preferably, the elastic component is an elastic body bushing, and the elastic body bushing is sleeved on the screw and its length is less than that of the screw.

[0008] Preferably, the elastic component includes a sleeve and a spring. A plurality of springs are arranged around the sleeve, the sleeve is sleeved on the screw, and the spring applies a radial thrust to the sleeve.

[0009] Compared with the prior art, the beneficial effect of the utility model is that: the code disc assembly and the housing of the utility model are connected in a flexible manner, reducing the damage caused by radial runout during use, and being beneficial to extending the service life of the encoder. Brief Description of the Drawings

[0010] Figure 1 It is a three-dimensional structural schematic diagram of Embodiment 1 of the utility model;

[0011] Figure 2 It is a schematic cross-sectional structure diagram of the first embodiment of the present utility model;

[0012] Figure 3 It is a schematic cross-sectional structure diagram of the second embodiment of the present utility model.

[0013] In the figure: 1, outer shell; 2, code disk assembly; 3, end cover; 4, rotating shaft; 5, connecting rod; 6, screw; 7, elastomeric bushing; 8, sleeve; 9, spring. Specific embodiments

[0014] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with 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 the embodiments.

[0015] For the first embodiment, please refer to Figure 1-2 , the present utility model provides a technical solution: an encoder with a flexible connection between the outer shell and the code disk assembly, including an outer shell 1 and a code disk assembly 2. An end cover 3 is fixedly installed at the port of the outer shell 1. The outer shell 1 is fixedly installed with a Z-shaped bracket. The bracket is installed with a connecting rod 5 through a bolt. The encoder is fixed to the outer shell of the motor through the connecting rod 5.

[0016] In the middle of the code disk assembly 2, there is an axially penetrating rotating shaft 4. The rotating shaft 4 is used for concentric connection with the motor shaft. A concentric code disk is installed at the upper end of the rotating shaft 4. The code disk rotates. By reading the continuous signal generated by the light-emitting diode passing through the grating and the code disk by the reading head, the number of turns or the position is recorded. Four ear seats are evenly arranged along the circumference on the outer side of the bottom of the code disk assembly 2. Four upward-penetrating screws 6 are inserted into the bottom of the outer shell 1. The upper ends of the screws 6 are screwed to the ear seats one by one. A flexible connection is realized between the outside of the screw 6 and the outer shell 1 through an elastic member. The elastic member is an elastomeric bushing 7. The elastomeric bushing 7 is sleeved on the screw 6 and its length is less than the length of the screw 6. The elastomeric bushing 7 can allow a certain deformation space for the code disk assembly 2 relative to the outer shell 1, and can avoid the damage problem of the encoder caused by the motor shaft and the encoder shaft being affected by external forces.

[0017] For the second embodiment, please refer to Figure 3 , which is different from the first embodiment in the specific structure of the elastic member. The elastic member includes a sleeve 8 and a spring 9. There are multiple Z-shaped springs 9 distributed around the sleeve 8. The sleeve 8 is sleeved on the screw 6. The spring 9 exerts a radial thrust on the sleeve 8 to maintain the balance of the screw 6. The sleeve 8 has a certain amount of swing allowance to meet the position change of the code disk assembly 2 relative to the outer shell 1 during use, so as to buffer the radial runout of the motor shaft and reduce damage.

[0018] Although embodiments of the present utility model have been shown and described, those of ordinary skill in the art can understand that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principle and spirit of the present utility model. The scope of the present utility model is defined by the appended claims and their equivalents.

Claims

1. An encoder with a housing and a code disc assembly flexibly connected, comprising a housing (1) and a code disc assembly (2), wherein a rotating shaft (4) is axially penetrated in the middle of the code disc assembly (2), characterized in that: The outer side of the bottom of the code disc assembly (2) is evenly provided with four ear seats along the circumference, and four screws (6) penetrating upward are inserted into the bottom of the outer shell (1). The upper ends of the screws (6) are screwed to the ear seats one by one, and the outer sides of the screws (6) are flexibly connected to the outer shell (1) via elastic components.

2. The encoder with a housing flexibly connected to a code disc assembly according to claim 1, characterized in that: An end cover (3) is fixedly mounted at the port of the housing (1).

3. The encoder with a housing flexibly connected to a code disc assembly according to claim 2, characterized in that: The housing (1) is fixedly mounted with a Z-shaped bracket, and the bracket is mounted with a connecting rod (5) via bolts.

4. The encoder with a housing and a code disc assembly flexibly connected according to claim 1, characterized in that: The elastic component is an elastomeric bushing (7), which is sleeved on the screw (6) and has a length smaller than that of the screw (6).

5. The encoder with a housing flexibly connected to a code disc assembly according to claim 1, characterized in that: The elastic component comprises a sleeve (8) and a spring (9). The spring (9) is provided in plurality and distributed around the sleeve (8). The sleeve (8) is sleeved on the screw (6). The spring (9) applies a radial thrust to the sleeve (8).

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