Motor encoder protective cover structure with fast disassembly and assembly and high sealing performance

Abstract

The utility model provides a motor encoder protective cover structure with fast disassembly and assembly and high sealing performance, which comprises a flange, the middle part of the flange is provided with an encoder mounting hole extending axially, the rear end of the encoder mounting hole is detachably provided with an elastic end cover, and the elastic end cover comprises a disc and an annular clamping part. The annular clamping part is circumferentially connected to the outer edge of the disc and extends backwards, the center of the disc protrudes backwards and is provided with a motor rotating shaft mounting hole, and the annular clamping part is embedded into the encoder mounting hole in an interference fit mode. The utility model has the advantages of quick disassembly and assembly characteristic, self-adaptive sealing capability and high-reliability locking.

Description

Technical Field

[0001] This utility model relates to the field of motor encoder protection technology, specifically a motor encoder protective cover structure that combines quick disassembly and assembly with high sealing performance. Background Technology

[0002] As a core sensing component in industrial automation systems, the accuracy and reliability of motor encoders directly affect the performance of motion control systems. In harsh working conditions such as industrial robots and CNC machine tools, encoders are exposed to metal dust, cutting fluid splashes, and high-frequency mechanical vibrations for extended periods. Traditional open mounting structures are prone to signal distortion and even device failure. Therefore, the industry generally adopts a flange-end cover combined protective structure, achieving sealing protection through bolt fastening between the flange base and the end cover.

[0003] The common protective structure in the existing technology usually consists of a flange base and an end cover. The flange base has multiple circumferentially distributed threaded holes that correspond to the insertion holes of the end cover, and multiple sets of bolts are used to connect them to achieve a seal. Although this design has basic protective functions, it has significant drawbacks in practical applications: First, the flange and end cover need to be machined with threaded holes and insertion holes respectively, which increases the processing cost and requires strict assembly accuracy. Second, the use of full circumferential bolt fastening means that all bolts need to be removed one by one during maintenance, which is time-consuming and laborious in the confined space of the equipment. Utility Model Content

[0004] The purpose of this invention is to overcome the defects in the prior art and provide a new type of protective cover structure that combines quick disassembly and assembly, adaptive sealing capability, and highly reliable locking, so as to improve the overall operation and maintenance efficiency of equipment.

[0005] To address the aforementioned issues, this utility model provides a motor encoder protective cover structure that combines quick assembly / disassembly with high sealing performance. The cover includes a flange with an axially extending encoder mounting hole in the center. A removable elastic end cap is provided at the rear end of the encoder mounting hole. The elastic end cap includes a disc and an annular snap-fit ​​portion. The annular snap-fit ​​portion is circumferentially connected to the outer edge of the disc and extends rearward. The center of the disc protrudes rearward and has a motor shaft mounting hole. The annular snap-fit ​​portion is interference-fitted into the encoder mounting hole.

[0006] Compared with the prior art, the advantages of this utility model are as follows: This utility model uses the interference fit design of the annular snap-fit ​​part and the encoder mounting hole to achieve radial compression sealing by utilizing the elastic deformation characteristics of the elastic end cap itself. This structure can be installed without bolt fastening, and sealing can be achieved by a single axial press-fit, which significantly simplifies the disassembly and assembly process, while avoiding the sealing failure problem caused by uneven preload of multiple bolts.

[0007] As an improvement, the front end of the annular snap-fit ​​part is provided with a tapered guide portion, which expands axially forward and contracts radially toward the disk. With this structure, the tapered guide portion's expanding and contracting conical surface automatically guides the annular snap-fit ​​part to align with the encoder mounting hole during assembly, reducing assembly resistance. The tapered transition design effectively avoids rigid collisions between the elastic end cap and the flange orifice edge, reducing the risk of structural damage during assembly.

[0008] As an improvement, the rear end of the annular snap-fit ​​portion extends radially outward to form an annular folded edge. This annular folded edge is located at the rear end of the flange and has a gap between it and the rear end face of the flange. With this structure, the gap between the annular folded edge and the rear end face of the flange provides physical intervention for hook operation. When the motor shaft is not disassembled, the elastic end cap can be quickly separated by applying the hook to the gap, solving the technical problem of traditional structures where disassembly tools cannot operate in confined spaces.

[0009] As an improvement, the rear end face of the flange is recessed to form an embedded hole, which is coaxially positioned at the rear end opening of the encoder mounting hole. The annular flange is embedded in the embedded hole, and the annular snap-fit ​​portion has at least one pry hole circumferentially positioned, with the opening of the pry hole facing the center of the disc. With this structure, the embedded hole integrates the annular flange into the rear end face of the flange, creating a flush end face appearance. It also enhances the sealing of the joint. The pry hole provides a direct force channel for disassembly tools; by inserting a tool into the pry hole and applying axial separation force, the elastic end cap can be quickly removed from the embedded hole.

[0010] As an improvement, a bushing is fixed to the rear end of the motor shaft mounting hole, with the bushing coaxially arranged with the motor shaft mounting hole and sequentially covering the motor shaft. With this structure, the axial extension design of the bushing increases the protective length around the motor shaft, enhancing dust prevention by extending the path of external contaminants. The bushing and motor shaft form a wrap-around structure, achieving dust barrier during dynamic operation without changing the radial installation space. Attached Figure Description

[0011] Figure 1 This is a perspective view of the present utility model;

[0012] Figure 2 This is an exploded view of the present invention;

[0013] Figure 3 This is the first perspective view of the bomb-like end cap of this utility model;

[0014] Figure 4 This is the second perspective view of the bomb-like end cap of this utility model;

[0015] Figure 5 This is a perspective view of the flange in this utility model;

[0016] Figure 6 This is a schematic diagram of the structure of this utility model assembled on the motor shaft.

[0017] Explanation of reference numerals in the attached figures:

[0018] 1. Flange; 10. Embedded hole; 2. Encoder mounting hole; 3. Flexible end cap; 31. Disc; 311. Motor shaft mounting hole; 32. Annular snap-fit ​​part; 321. Tapered guide part; 322. Annular folded edge; 323. Pry hole; 4. Bushing. Detailed Implementation

[0019] To make the above-mentioned objectives, features and advantages of this utility model more apparent and understandable, the specific embodiments of this utility model will be described in detail below with reference to the accompanying drawings.

[0020] like Figure 1 and Figure 2 As shown, a motor encoder protective cover structure that combines quick assembly / disassembly and high sealing performance includes a flange 1. An axially extending encoder mounting hole 2 is provided in the center of the flange 1. A removable elastic end cap 3 is provided at the rear end of the encoder mounting hole 2. The elastic end cap 3 includes a disc 31 and an annular snap-fit ​​portion 32. The annular snap-fit ​​portion 32 is circumferentially connected to the outer edge of the disc 31 and extends rearward. The center of the disc 31 bulges rearward and has a motor shaft mounting hole 311. The annular snap-fit ​​portion 32 is interference-fitted into the encoder mounting hole 2. The elastic end cap 3 is stamped from an aluminum plate and has metallic elasticity. The rearward bulge design of the center of the disc 31, on the one hand, allows the disc 31 to have stronger elasticity, providing a higher radial outward preload force, thus more firmly fixing the elastic end cap 3 in the encoder mounting hole 2. On the other hand, the rearward bulge of the center of the disc 31 creates a larger space at the front end of the disc 31 to accommodate the encoder.

[0021] This embodiment uses the interference fit design between the annular snap-fit ​​part 32 and the encoder mounting hole 2 to achieve radial compression sealing by utilizing the elastic deformation characteristics of the elastic end cap 3 itself. This structure can be installed without bolt fastening, and a single axial press can achieve sealing and fixation, which significantly simplifies the disassembly and assembly process, while avoiding the sealing failure problem caused by uneven preload of multiple bolts.

[0022] like Figures 2 to 4 As shown, the annular snap-fit ​​part 32 has a tapered guide part 321 at its front end. The tapered guide part 321 expands axially forward and contracts radially toward the disk 31. With this structure, the tapered surface structure of the tapered guide part 321 automatically guides the annular snap-fit ​​part 32 to align with the encoder mounting hole 2 during assembly, reducing assembly resistance. The tapered transition design effectively avoids rigid collision between the elastic end cap 3 and the edge of the flange 1 orifice, reducing the risk of structural damage during assembly.

[0023] like Figures 2 to 4 As shown, the rear end of the annular snap-fit ​​portion 32 extends radially outward to form an annular flange 322. The annular flange 322 is located at the rear end of the flange 1 and has a gap between it and the rear end face of the flange 1. With this structure, the gap between the annular flange 322 and the rear end face of the flange 1 provides physical intervention conditions for hook operation. When the motor shaft is not disassembled, the elastic end cap 3 can be quickly separated by the hook acting on the gap, solving the technical pain point of traditional structures where disassembly tools cannot be operated in confined spaces.

[0024] like Figure 4 and Figure 5 As shown, the rear end face of flange 1 has a recessed recess 10, which is coaxially positioned at the rear end opening of encoder mounting hole 2. An annular flange 322 is embedded within the recess 10. The annular snap-fit ​​portion 32 has at least one pry hole 323 circumferentially positioned, with the opening of the pry hole 323 facing the center of disk 31. With this structure, the recess 10 integrates the annular flange 322 into the rear end face of flange 1, creating a flush end face appearance and enhancing the sealing of the joint. The pry hole 323 provides a direct force channel for disassembly tools. By inserting a tool into the pry hole 323 and applying axial separation force, the elastic end cap 3 can be quickly dislodged from the recess 10.

[0025] like Figure 3 , Figure 4 and Figure 6 As shown, a bushing 4 is fixed to the rear end of the motor shaft mounting hole 311. The bushing 4 is coaxially arranged with the motor shaft mounting hole 311 and sequentially covers the motor shaft. With this structure, the axial extension design of the bushing 4 increases the protective length of the motor shaft periphery, improving dust prevention by extending the intrusion path of external pollutants. The bushing 4 and the motor shaft form a wrap-around structure, achieving dust barrier during dynamic operation without changing the radial installation space.

[0026] Although the disclosure is as stated above, the scope of protection of this disclosure is not limited thereto. Those skilled in the art can make various changes and modifications without departing from the spirit and scope of this disclosure, and all such changes and modifications will fall within the protection scope of this utility model.

Claims

1. A motor encoder protective cover structure that combines quick assembly / disassembly and high sealing performance, comprising a flange (1), wherein an axially extending encoder mounting hole (2) is provided in the middle of the flange (1), and an elastic end cap (3) is detachably provided at the rear end of the encoder mounting hole (2), characterized in that: The elastic end cap (3) includes a disc (31) and an annular snap-fit ​​part (32). The annular snap-fit ​​part (32) is circumferentially connected to the outer edge of the disc (31) and extends rearward. The center of the disc (31) is raised rearward and is provided with a motor shaft mounting hole (311). The annular snap-fit ​​part (32) is interference-fitted into the encoder mounting hole (2).

2. The motor encoder protective cover structure with both quick assembly / disassembly and high sealing performance as described in claim 1, characterized in that: The front end of the annular snap-fit ​​part (32) is provided with a tapered guide part (321), which extends axially forward and contracts radially toward the disk (31).

3. The motor encoder protective cover structure with both quick assembly / disassembly and high sealing performance as described in claim 1, characterized in that: The rear end of the annular snap-fit ​​portion (32) extends radially outward to form an annular fold (322), which is located at the rear end of the flange (1) and has a gap between it and the rear end face of the flange (1).

4. The motor encoder protective cover structure with both quick assembly / disassembly and high sealing performance as described in claim 1, characterized in that: The flange (1) has a recessed recessed hole (10) on its rear end face. The recessed hole (10) is coaxially disposed at the rear end opening of the encoder mounting hole (2). The annular flange (322) is embedded in the recessed hole (10). The annular snap-fit ​​part (32) has at least one pry hole (323) circumferentially disposed on its circumferential side. The opening of the pry hole (323) is disposed facing the center of the disc (31).

5. The motor encoder protective cover structure with both quick assembly / disassembly and high sealing performance as described in claim 1, characterized in that: A bushing (4) is fixed to the rear end of the motor shaft mounting hole (311). The bushing (4) is coaxially arranged with the motor shaft mounting hole (311) and sequentially covers the motor shaft.

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