High-protection-grade hollow shaft encoder structure with built-in oil seal

Abstract

The utility model provides a built-in oil seal high protection grade hollow shaft encoder structure, which comprises an encoder main body, an encoder shell, an encoder main shaft, an oil seal seat, a fixing screw and an oil seal component, the oil seal seat comprises a mounting part, a supporting part and a bottom support part which are integrally arranged, the supporting part is vertically arranged and annularly corresponding to the periphery of the encoder main shaft, and the bottom support part is fixedly connected with the encoder main shaft. The installation part is fixedly connected with the outer side of the upper end of the supporting part, the supporting part is fixed to the lower end face of the end cover through fixing screws, the bottom supporting part is horizontally arranged and annularly corresponds to the periphery of the encoder main shaft, the outer side of the bottom supporting part is fixedly connected with the lower end of the supporting part, and the supporting part, the bottom supporting part, the end cover and the encoder main shaft define an oil seal cavity. The oil seal part is fixed in the oil seal cavity, the inner side of the oil seal part is an elastic end, and the elastic end of the oil seal part abuts against the outer side of the encoder main shaft. The design has the advantages that the machining efficiency of the encoder shell is improved; foreign matters are effectively prevented from entering the encoder; and the installation mode of the oil seal part is simpler and more convenient.

Description

Technical Field

[0001] The utility model relates to the field of hollow shaft encoders, in particular to a hollow shaft encoder structure with a built-in oil seal and a high protection level. Background Art

[0002] An encoder is a device that converts angle or displacement information into electrical signals for transmission and communication. Based on their mounting method, encoders are categorized as either solid-shaft or hollow-shaft encoders. Typically, an oil seal is placed between the encoder shaft and the main body to improve sealing and prevent the intrusion of oil and dust during encoder shaft rotation. However, traditional encoder oil seals are often exposed, making them susceptible to aging and failure. Compared to solid-shaft encoders, hollow-shaft encoders struggle to achieve a high level of sealing. Therefore, it is necessary to develop a hollow-shaft encoder structure with a built-in oil seal and a high level of protection to address these issues. Utility Model Content

[0003] The purpose of the utility model is to provide a hollow shaft encoder structure with a built-in oil seal and a high protection level to solve the problems mentioned in the background technology.

[0004] In order to achieve the above purpose, the present invention provides the following technical solutions:

[0005] A hollow shaft encoder structure with a built-in oil seal and a high protection level, comprising an encoder body, an encoder housing, an encoder spindle, an oil seal seat, fixing screws and an oil seal component. The encoder spindle is rotatably mounted in the middle of the encoder body. The encoder housing comprises an integral side cover and an end cover. The side cover is vertically arranged and the lower end is fixed to the encoder body. The end cover is horizontally arranged and the outer end is fixedly connected to the upper end of the side cover. A spindle through-hole is provided in the middle of the end cover, and the upper end of the encoder spindle passes through the spindle through-hole. The encoder housing, the encoder body and the encoder spindle are enclosed to form a mounting cavity. The oil seal seat is arranged In the mounting cavity, the oil seal seat includes an integral mounting portion, a supporting portion and a bottom supporting portion. The supporting portion is vertically arranged and annularly corresponding to the outer periphery of the encoder main shaft. The mounting portion is fixedly connected to the outer side of the upper end of the supporting portion. The supporting portion is fixed to the lower end surface of the end cover by a fixing screw. The bottom supporting portion is horizontally arranged and annularly corresponding to the outer periphery of the encoder main shaft. The outer side of the bottom supporting portion is fixedly connected to the lower end of the supporting portion. The supporting portion, the bottom supporting portion, the end cover and the encoder main shaft enclose an oil seal cavity. The oil seal component is fixed in the oil seal cavity and the inner side is an elastic end. The elastic end of the oil seal component conflicts with the outer side of the encoder main shaft.

[0006] Further description of the utility model: The oil seal component includes an integrally arranged vertical positioning part, a horizontal sealing part and a movable sealing part. The vertical positioning part is fitted with the inner side of the support part, and the upper and lower ends of the vertical positioning part are respectively in contact with the end cover and the bottom supporting part. The lower end of the horizontal sealing part is fitted with the bottom supporting part, the outer end of the horizontal sealing part is fixed to the lower end of the vertical positioning part, the inner end of the horizontal sealing part is in contact with the encoder main shaft, the outer side of the movable sealing part is inclined downward and connected to the horizontal sealing part, and the inner end of the movable sealing part is in contact with the encoder main shaft.

[0007] Further description of the utility model: It also includes a sealing ring, an annular groove is provided on the outer side of the upper end of the encoder body, the sealing ring is arranged in the annular groove, and the outer side of the sealing ring contacts the inner wall of the side cover.

[0008] The beneficial effects of the present invention are as follows: the encoder main shaft is a through-hole structure, the inner side of the oil seal component is in close contact with the encoder main shaft, the oil seal seat is fixed to the encoder housing by fixing screws, and the outer wall of the oil seal component is squeezed to fix it. This fixing method no longer requires the encoder housing to be machined with a groove for installing the oil seal component, which greatly reduces the processing cost of the housing and improves the processing efficiency of the encoder housing. The processing consistency of the oil seal seat is better, so that the oil seal component and the encoder main shaft are evenly fitted, effectively preventing external foreign matter such as oil and water from entering the interior of the encoder. The encoder main shaft rotates more smoothly, and the installation method of the oil seal component is also simpler. BRIEF DESCRIPTION OF THE DRAWINGS

[0009] Figure 1 It is the overall structural diagram of the utility model;

[0010] Figure 2 yes Figure 1 A partial enlarged view of position A in the middle;

[0011] Description of reference numerals:

[0012] 1. Encoder body; 2. Encoder housing; 21. Side cover; 22. End cover; 23. Mounting cavity; 3. Encoder main shaft; 4. Oil seal seat; 41. Mounting part; 42. Support part; 43. Bottom support part; 44. Oil seal cavity; 5. Fixing screw; 6. Oil seal component; 61. Vertical positioning part; 62. Horizontal sealing part; 63. Movable sealing part; 7. Sealing ring. DETAILED DESCRIPTION

[0013] The present invention will be further described below with reference to the accompanying drawings:

[0014] like Figures 1 to 2As shown, a hollow shaft encoder structure with a built-in oil seal and a high protection level includes an encoder body 1, an encoder housing 2, an encoder spindle 3, an oil seal seat 4, a fixing screw 5 and an oil seal component 6. The encoder spindle 3 is rotatably mounted in the middle of the encoder body 1. The encoder housing 2 includes an integral side cover 21 and an end cover 22. The side cover 21 is vertically arranged and the lower end is fixed to the encoder body 1. The end cover 22 is horizontally arranged and the outer end is fixedly connected to the upper end of the side cover 21. A spindle through hole is provided in the middle of the end cover 22. The upper end of the encoder spindle 3 passes through the spindle through hole. The encoder housing 2, the encoder body 1, and the encoder spindle 3 enclose a mounting cavity 23. The oil seal seat 4 is arranged in the mounting cavity 23. 3, the oil seal seat 4 includes an integral mounting portion 41, a support portion 42 and a bottom supporting portion 43. The support portion 42 is vertically arranged and annularly corresponding to the outer periphery of the encoder spindle 3. The mounting portion 41 is fixedly connected to the outer side of the upper end of the support portion 42. The support portion 42 is fixed to the lower end surface of the end cover 22 by a fixing screw 5. The bottom supporting portion 43 is horizontally arranged and annularly corresponding to the outer periphery of the encoder spindle 3. The outer side of the bottom supporting portion 43 is fixedly connected to the lower end of the support portion 42. The support portion 42, the bottom supporting portion 43, the end cover 22 and the encoder spindle 3 enclose an oil seal cavity 44. The oil seal component 6 is fixed in the oil seal cavity 44 with the inner side as an elastic end. The elastic end of the oil seal component 6 contacts the outer side of the encoder spindle 3.

[0015] The encoder main shaft 3 is a through-hole structure. The inner side of the oil seal component 6 is in close contact with the encoder main shaft 3. The oil seal seat 4 is fixed to the encoder housing 2 by a fixing screw 5 and squeezes the outer wall of the oil seal component 6 to fix it. This fixing method no longer requires the encoder housing 2 to be processed with a groove for installing the oil seal component 6, which greatly reduces the processing cost of the housing and improves the processing efficiency of the encoder housing 2. The processing consistency of the oil seal seat 4 is better, so that the oil seal component 6 and the encoder main shaft 3 are evenly fitted, effectively preventing external foreign matter such as oil and water from entering the interior of the encoder. The encoder main shaft 3 rotates more smoothly, and the installation method of the oil seal component 6 is also simpler.

[0016] The oil seal component 6 includes an integrally arranged vertical positioning portion 61, a horizontal sealing portion 62 and a movable sealing portion 63. The vertical positioning portion 61 is fitted with the inner side of the support portion 42, and the upper and lower ends of the vertical positioning portion 61 are respectively in contact with the end cover 22 and the bottom supporting portion 43. The lower end of the horizontal sealing portion 62 is fitted with the bottom supporting portion 43, and the outer end of the horizontal sealing portion 62 is fixed to the lower end of the vertical positioning portion 61. The inner end of the horizontal sealing portion 62 is in contact with the encoder main shaft 3. The outer side of the movable sealing portion 63 is inclined downward and connected to the horizontal sealing portion 62. The inner end of the movable sealing portion 63 is in contact with the encoder main shaft 3.

[0017] The vertical positioning part 61 supports and positions the horizontal sealing part 62 and the movable sealing part 63. The inner ends of the horizontal sealing part 62 and the movable sealing part 63 are in contact with the encoder main shaft 3, which greatly reduces the risk of foreign matter such as oil and water entering.

[0018] In this design, a sealing ring 7 is also included. An annular groove is provided on the outer side of the upper end of the encoder body 1. The sealing ring 7 is arranged in the annular groove, and the outer side of the sealing ring 7 contacts the inner wall of the side cover 21.

[0019] A sealing ring 7 is placed between the encoder housing 2 and the encoder body 1 to prevent oil and water from entering through the joint between the encoder housing 2 and the encoder body 1, further improving the sealing performance of the product.

[0020] The above does not limit the technical scope of the present invention. Any modifications, equivalent changes and modifications made to the above embodiments based on the technical essence of the present invention are still within the scope of the technical solution of the present invention.

Claims

1. A hollow shaft encoder structure with a built-in oil seal and high protection level, characterized by: The encoder comprises an encoder body, an encoder housing, an encoder spindle, an oil seal seat, a fixing screw and an oil seal component. The encoder spindle is rotatably mounted in the middle of the encoder body. The encoder housing comprises an integral side cover and an end cover. The side cover is vertically arranged and the lower end is fixed to the encoder body. The end cover is horizontally arranged and the outer end is fixedly connected to the upper end of the side cover. A spindle through-hole is provided in the middle of the end cover. The upper end of the encoder spindle passes through the spindle through-hole. The encoder housing, the encoder body and the encoder spindle are enclosed to form a mounting cavity. The oil seal seat is arranged in the mounting cavity. The oil seal seat comprises an integral A mounting portion, a supporting portion and a bottom supporting portion are provided, the supporting portion is vertically provided and annularly corresponding to the outer periphery of the encoder main shaft, the mounting portion is fixedly connected to the outer side of the upper end of the supporting portion, the supporting portion is fixed to the lower end surface of the end cover by the fixing screw, the bottom supporting portion is horizontally provided and annularly corresponding to the outer periphery of the encoder main shaft, the outer side of the bottom supporting portion is fixedly connected to the lower end of the supporting portion, the supporting portion, the bottom supporting portion, the end cover and the encoder main shaft together form an oil seal cavity, the oil seal component is fixed in the oil seal cavity and the inner side is an elastic end, and the elastic end of the oil seal component conflicts with the outer side of the encoder main shaft.

2. The hollow shaft encoder structure with a built-in oil seal and a high protection level according to claim 1, characterized in that: The oil seal component includes an integrally arranged vertical positioning portion, a horizontal sealing portion and a movable sealing portion, the vertical positioning portion is fitted with the inner side of the support portion, the upper and lower ends of the vertical positioning portion are respectively in contact with the end cover and the bottom supporting portion, the lower end of the horizontal sealing portion is fitted with the bottom supporting portion, the outer end of the horizontal sealing portion is fixed to the lower end of the vertical positioning portion, the inner end of the horizontal sealing portion is in contact with the encoder main shaft, the outer side of the movable sealing portion is inclined downward and connected to the horizontal sealing portion, and the inner end of the movable sealing portion is in contact with the encoder main shaft.

3. The hollow shaft encoder structure with a built-in oil seal and a high protection level according to claim 1, characterized in that: It also includes a sealing ring. An annular groove is provided on the outer side of the upper end of the encoder body. The sealing ring is arranged in the annular groove. The outer side of the sealing ring contacts the inner wall of the side cover.

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