Waterproof large-aperture encoder

Abstract

The utility model relates to a waterproof large-aperture encoder, which comprises a shell, and the outer surface of the shell is provided with a plug used for being electrically connected with external equipment. According to the utility model, the plug used for being electrically connected with the external equipment is arranged on the outer surface of the shell, so that the stable and reliable electrical connection between the encoder and the external equipment is ensured, the design is convenient for connection and disconnection, pollutants such as moisture and dust can be effectively prevented from entering the encoder, and the service life of the encoder is prolonged. The transmission shaft extends to the outside of the shell through the opening formed in the top wall of the shell, and the shaft sleeve and the enclasping ring are arranged on the outer surface of the transmission shaft in a sleeving mode, so that stable support is provided for the transmission shaft, vibration and noise of the transmission shaft in the rotating process are effectively reduced through the fastening effect of the enclasping ring, and the service life of the transmission shaft is prolonged. The elastic sheet support is arranged on the periphery of the shaft sleeve which extends out of the shell and is provided with the enclasping ring, so that the overall structure of the encoder is more compact.

Description

TECHNICAL FIELD

[0001] The utility model relates to encoder technical field especially relates to a waterproof large aperture encoder. BACKGROUND

[0002] In the existing encoder technical field, with the continuous development of industrial automation, the performance requirement of the encoder is also higher and higher. Especially in some applications that require waterproof, dustproof and can withstand large mechanical load, the traditional encoder is often difficult to meet the demand, the encoder in the prior art is often difficult to maintain stable electrical connection and protection of internal components in harsh environments, for example, moisture, dust and other contaminants may enter the encoder interior through the shell opening, causing electrical connection failure or internal component damage, secondly, in the design of the transmission shaft and the shaft sleeve, the encoder in the prior art may lack sufficient support and fixation, causing excessive vibration and noise of the transmission shaft during rotation, thereby affecting the accuracy and reliability of the encoder, in addition, the sensing method and signal processing of the encoder module are also a key problem in the prior art, the traditional encoder module may adopt a contact sensing method, which may cause wear and signal distortion, thereby affecting the accuracy and stability of the encoder. SUMMARY

[0003] Therefore, the utility model discloses a waterproof large aperture encoder with strong waterproof sealing, high support stability, accurate measurement precision and adaptability to different working environments.

[0004] In order to realize the above purpose, the utility model adopts such a waterproof large aperture encoder, including the casing, the outer surface of the casing is equipped with the plug for electrical connection with external equipment, the inside of the casing is equipped with the transmission shaft, and the top wall of the casing is equipped with the opening corresponding to the transmission shaft, the transmission shaft extends to the outside of the casing through the opening on the top wall of the casing, the outer surface of the transmission shaft is equipped with the shaft sleeve, the shaft sleeve extends out of the opening of the casing, and the outer surface is equipped with the embracing ring, the casing is equipped with the elastic sheet support, the elastic sheet support extends out of the casing around the transmission shaft and is arranged around the shaft sleeve of the embracing ring.

[0005] The advantages of the above structure are as follows: By setting the plug on the outer surface of the housing, the electrical connection between the encoder and external devices is ensured to be both stable and reliable. High-quality sealing rings are used inside the plug and at its connection with the housing, effectively preventing the intrusion of moisture and dust. The drive shaft extends to the outside through an opening in the top wall of the housing, and its outer surface is fitted with a wear-resistant bushing and a tight clamping ring, providing solid support for the drive shaft and significantly reducing vibration and noise during rotation. In addition, we have added a multi-layer precision sealing structure between the bushing and the housing opening. These sealing structures fit together tightly to form a waterproof barrier, ensuring that moisture cannot seep into the encoder from the part where the drive shaft passes through. The spring clip bracket is located around the bushing where the drive shaft extends out of the housing and is fitted with the clamping ring, which not only makes the overall structure of the encoder more compact, but also greatly facilitates subsequent maintenance and replacement work.

[0006] This utility model is further configured with a top cover fitted onto the outer surface of the bushing at the top of the housing opening, and a rubber gasket at the bottom wall of the end of the housing opening. A first oil seal and a second oil seal are respectively fitted onto the outer surface of the bushing. The first oil seal is positioned close to the top cover, and the second oil seal is positioned adjacent to the rubber gasket. The top cover effectively prevents external contaminants from entering the encoder through the housing opening, thus protecting the internal electrical components and transmission mechanism from damage. Simultaneously, the combined use of the rubber gasket and the first and second oil seals further enhances the sealing performance between the bushing and the housing, ensuring stable operation of the encoder in harsh environments. The first and second oil seals not only provide a sealing function but also maintain lubrication between the bushing and the drive shaft to a certain extent, helping to reduce friction and wear and extend the encoder's service life. Furthermore, the oil seal design prevents lubricating oil or grease from leaking to the outside of the encoder, thereby keeping the encoder's interior clean and dry.

[0007] This utility model is further configured such that a first bearing and a second bearing, respectively, are sleeved on a bushing between the first oil seal and the second oil seal, and the first bearing and the second bearing are fitted together. This fitted arrangement of the first bearing and the second bearing effectively supports the drive shaft, reducing friction and resistance during rotation, thereby improving transmission efficiency.

[0008] This utility model is further configured such that a retaining ring is sleeved on the bushing between the first bearing and the first oil seal. The retaining ring is tightly fitted to the first bearing and adjacent to the first oil seal. The tight fit between the retaining ring and the first bearing helps ensure the stable position of the first bearing on the bushing. Although there is a certain gap between the retaining ring and the first oil seal, this arrangement still helps improve the sealing performance of the encoder.

[0009] This utility model is further configured with a film code disk that is snapped onto the bushing between the second bearing and the second oil seal, maintaining a certain distance from the second bearing and the second oil seal. An encoder module, installed inside the housing, is located on one side of the film code disk. The encoder module has a groove for sensing signals on the film code disk. As a high-precision measuring element, the film code disk can accurately record the rotation angle and position of the bushing. By sensing signals on the film code disk, the encoder module can obtain the rotation information of the bushing in real time and accurately, thereby improving the measurement accuracy of the encoder. Furthermore, the non-contact design between the film code disk and the encoder module reduces errors and malfunctions caused by friction and wear.

[0010] This utility model is further configured with a housing comprising a mounting body and an outer shell covering the mounting body. A first sealing ring and a second sealing ring are provided at the connection between the mounting body and the outer shell, and the mounting body has a circuit board mounted on its bottom, positioned below the encoder module. The first and second sealing rings effectively prevent external contaminants from entering the encoder from the connection between the mounting body and the outer shell. The separate design of the mounting body and the outer shell makes the encoder's internal structure clearer and more organized. The circuit board's installation at the bottom of the mounting body ensures its stable mounting inside the encoder. The circuit board's position below the encoder module facilitates electrical connection with the encoder module.

[0011] This utility model is further configured with an aviation plug, including a plug end connected to the outer surface of the housing and a plug end for electrical connection with external devices. A third sealing ring is wound around the inner wall of the plug end. The aviation plug can withstand greater insertion and extraction forces and vibration impacts, ensuring a stable and reliable electrical connection with external devices. The third sealing ring further enhances the sealing performance of the plug end, preventing moisture, dust, and other contaminants from entering the plug, thereby improving the reliability and stability of the connection.

[0012] This invention further features a drive shaft made of metal. Metal materials have high strength and hardness, which allows the drive shaft to withstand large torques and bending forces without easily deforming or breaking. Furthermore, it has corrosion resistance, maintaining stable performance in humid and highly corrosive environments and is not easily damaged by corrosion, thus extending the service life of the drive shaft.

[0013] This utility model further specifies that the bushing is made of wear-resistant composite material. Because the material itself has high hardness and wear resistance, the bushing can effectively reduce wear caused by friction during use, and also has high mechanical strength, which allows the bushing to remain stable under heavy loads and complex stress conditions.

[0014] This utility model is further configured such that the bottom wall of the housing is covered with a removable cover. The removable cover allows the housing to be adapted to different application scenarios and working environments as needed. Attached Figure Description

[0015] Figure 1 This is a three-dimensional schematic diagram of the overall structure of Embodiment 1 of this utility model.

[0016] Figure 2 This is an exploded view of the assembly of the housing and the aviation plug according to Embodiment 1 of this utility model.

[0017] Figure 3 This is an exploded view of the assembly of the mounting body, outer shell, rubber gasket, and cover according to Embodiment 1 of this utility model.

[0018] Figure 4 This is an exploded view of the assembly of the drive shaft and bushing with the housing according to Embodiment 1 of this utility model.

[0019] Figure 5 This is an exploded view of the internal structure assembly of the shell according to Embodiment 1 of this utility model.

[0020] Figure 6 This is an exploded view of the outer surface components of the bushing according to Embodiment 1 of this utility model.

[0021] Figure 7 This is a three-dimensional schematic diagram of the circuit board assembled inside the housing according to Embodiment 1 of this utility model.

[0022] Figure 8 This is an exploded view of the encoder module and circuit board in the housing according to Embodiment 1 of this utility model.

[0023] Figure 9 This is a three-dimensional structural schematic diagram of Embodiment 2 of this utility model. Detailed Implementation

[0024] like Figures 1-9 As shown, Embodiment 1 of this utility model provides a waterproof large-aperture encoder. The encoder consists of a robust housing 1, which includes a mounting body 11 and an outer shell 12 covering the mounting body 11. A first sealing ring 111 and a second sealing ring 112 are provided at the connection between the mounting body 11 and the outer shell 12 to ensure the sealing and dustproof and waterproof performance of the internal components. An aviation plug 2 is provided on the outer surface of the housing 1. The aviation plug 2 includes a plug end 21 that is tightly connected to the housing 1 and a plug end 22 for electrical connection with external devices. A third sealing ring 211 is wrapped around the inner wall of the plug end 21 to enhance the waterproof and dustproof capabilities of the aviation plug 2.

[0025] The housing 1 houses a drive shaft 3 made of high-strength metal to ensure its ability to withstand torque and axial force. The drive shaft 3 extends through a large-diameter opening 13 on the top wall of the mounting body 11 to the outside of the housing 1, which is formed by the mounting body 11 and the outer shell 12. The diameter of this opening 13 is significantly larger than that of a conventional encoder, providing sufficient space for installation, maintenance, and connection to external devices. A wear-resistant composite material bushing 4 is fitted onto the outer surface of the drive shaft 3. This bushing 4 partially extends out of the opening 13 of the mounting body 11, and a clamping ring 5 is fitted onto its outer surface. To fix the bushing 4 and prevent it from loosening, the drive shaft 3 itself is a cylinder 31 with a corresponding central bore diameter to accommodate the large-diameter opening 13. In the part of the cylinder 31 that extends out of the housing 1, which is composed of the mounting body 11 and the outer shell 12, i.e. the area where the drive shaft 3 connects with the external equipment, there are six evenly distributed keyways 32. The arrangement of these keyways 32 enhances the connection stability between the drive shaft 3 and the external equipment and effectively transmits torque. The mounting body 11 is provided with a spring clip bracket 6. The spring clip bracket 6 is arranged around the bushing 4, which extends out of the housing 1 and is equipped with a clamping ring 5, to provide support and fixation.

[0026] At the top of the opening 13 of the mounting body 11, a top cover 41 is provided, which is fitted onto the outer surface of the bushing 4 to prevent dust and moisture from entering the encoder. A rubber gasket 121 is provided at the bottom wall of the opening 13 of the housing 12. A first oil seal 42 and a second oil seal 43 are respectively fitted onto the outer surface of the bushing 4. The first oil seal 42 is set close to the top cover 41, and the second oil seal 43 is set close to the rubber gasket 121 to prevent lubricating oil leakage. Between the first oil seal 42 and the second oil seal 43, a first bearing 44 and a second bearing 45 are respectively fitted onto the bushing 4. The first bearing 44 and the second bearing 45 are set close together to support the drive shaft 3 and reduce friction during its rotation. Resistance is provided by a retaining ring 46 fitted on the bushing 4 between the first bearing 44 and the first oil seal 42. The retaining ring 46 is tightly fitted to the first bearing 44 and adjacent to the first oil seal 42. It is used to fix the position of the bearing and prevent its axial movement. Between the second bearing 45 and the second oil seal 43, a film code disk 47 is snapped onto the bushing 4. The film code disk 47 is spaced apart from the second bearing 45 and the second oil seal 43. An encoder module 14 is installed in the mounting body 11 on one side of the film code disk 47. The encoder module 14 has a groove for sensing the signal on the film code disk 47, thereby realizing the measurement of the rotation angle or speed of the transmission shaft 3.

[0027] A circuit board 15 is located at the bottom of the mounting body 11, below the encoder module 14. The circuit board 15 has circuits connected to the encoder module 14 for processing and transmitting signals. The bottom wall of the housing 12 is also covered with a removable cover 16, which covers the bottom of the rubber gasket 121 and forms a sealed connection with the bottom wall of the housing 12. This protects the circuit board 15 from dust, moisture, and mechanical damage, and allows for easy opening for internal inspection and maintenance when needed. When the drive shaft 3 is connected to external equipment, the cover 16 provides a closed environment to ensure that the internal components of the encoder are not affected. In addition, the encoder of this embodiment is designed with a replaceable intermediate shaft diameter to adapt to different application scenarios and load requirements. By replacing the bushings of different sizes, the encoder can flexibly adapt to the requirements of various transmission systems and equipment, thereby greatly improving its versatility and applicability. Furthermore, the encoder adopts an advanced circuit design, which not only gives the encoder excellent circuit anti-interference capability, but also ensures that the circuit layout on the circuit board is reasonable and the signal transmission is stable and reliable.

[0028] The above is a specific embodiment of the present utility model. In addition, besides the solution of embodiment one, the present utility model also includes another specific embodiment, as follows:

[0029] The second specific embodiment of this utility model provides a waterproof large-aperture encoder. The encoder is similar to the first embodiment in overall structure, but the main difference is that the bottom wall of the housing 12 is not covered with a cover 16. This design allows the drive shaft 3 to directly pass through the housing 12 and connect to external devices. It is suitable for application scenarios that require the drive shaft 3 to be directly exposed or frequently access the internal components of the encoder. The design without a cover 16 also facilitates direct access to the internal components of the encoder when needed for installation, debugging or maintenance operations.

[0030] Of course, in addition to the above embodiments, this utility model may have other various embodiments. Without departing from the essential technical solution of this utility model, those skilled in the art can make various corresponding changes and modifications based on this utility model, and these changes or modifications are equivalent to the technical solution in this patent. Therefore, these corresponding changes and modifications should all fall within the protection scope of the appended claims of this utility model.

Claims

1. A waterproof large-aperture encoder, characterized in that: The device includes a housing with a plug on its outer surface for electrical connection to an external device. Inside the housing is a drive shaft with an opening on its top wall corresponding to the drive shaft. The drive shaft extends to the outside of the housing through the opening on its top wall. A bushing is fitted onto the outer surface of the drive shaft, extending partially out of the opening in the housing, and a retaining ring is fitted onto its outer surface. A spring clip bracket is provided on the housing, surrounding the bushing with the retaining ring and extending out of the housing. An encoder module and a circuit board are also provided inside the housing. The encoder module senses the rotation signal of the drive shaft, and the circuit board is electrically connected to the encoder module to process the signal output by the encoder module.

2. The waterproof large-aperture encoder according to claim 1, characterized in that: The top end of the housing opening is provided with a top cap that is fitted onto the outer surface of the bushing. A rubber gasket is provided at the bottom wall of the end of the housing opening. A first oil seal and a second oil seal are respectively fitted onto the outer surface of the bushing. The first oil seal is set close to the top cap, and the second oil seal is set close to the rubber gasket.

3. The waterproof large-aperture encoder according to claim 2, characterized in that: A first bearing and a second bearing, respectively, are provided between the first oil seal and the second oil seal and are sleeved on the bushing. The first bearing and the second bearing are fitted together.

4. The waterproof large-aperture encoder according to claim 3, characterized in that: A retaining ring is provided between the first bearing and the first oil seal, and the retaining ring is fitted tightly to the first bearing and adjacent to the first oil seal.

5. The waterproof large-aperture encoder according to claim 3 or 4, characterized in that: A film code disk is provided between the second bearing and the second oil seal, which is snapped onto the bushing and maintains a certain distance from the second bearing and the second oil seal. An encoder module is provided on one side of the film code disk and installed in the housing. The encoder module has a groove for sensing the signal on the film code disk.

6. The waterproof large-aperture encoder according to claim 5, characterized in that: The housing includes a mounting body and an outer shell covering the mounting body. The connection between the mounting body and the outer shell is provided with a first sealing ring and a second sealing ring wrapped around the mounting body. A circuit board is mounted on the bottom of the mounting body and is located below the encoder module.

7. The waterproof large-aperture encoder according to claim 1, characterized in that: The plug is an aviation plug, and includes a plug end that is connected to the outer surface of the housing and a plug end that is electrically connected to an external device. A third sealing ring is wound around the inner wall of the plug end.

8. The waterproof large-aperture encoder according to claim 1, characterized in that: The drive shaft is made of metal.

9. The waterproof large-aperture encoder according to claim 1, characterized in that: The bushing is made of wear-resistant composite material.

10. The waterproof large-aperture encoder according to claim 6, characterized in that: The bottom wall of the outer casing is also covered with a removable cover.

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