Waterproof rotary encoder

Abstract

The utility model relates to the technical field of rotary encoders, in particular to a waterproof rotary encoder, which comprises a casing, a front end cover is arranged at one end of the casing, a rear end cover is arranged at the other end of the casing, close surfaces of the front end cover and the rear end cover are abutted against the end of the casing, and close ends of the front end cover and the rear end cover are provided with sealing rings. When the close faces of the front end cover and the rear end cover abut against the ends of the machine shell, one end of each sealing ring extends into the corresponding sealing groove, a rotating shaft is coaxially arranged in the machine shell, one end of the rotating shaft penetrates through the front end cover, and the other end of the rotating shaft penetrates through the rear end cover. The two sealing rings are matched with the corresponding sealing grooves in the end portions of the machine shell, gaps between the machine shell and the front end cover and gaps between the machine shell and the rear end cover can be sealed, gaps between the cables and the mounting holes can be sealed through the sealing sleeves, external moisture can be prevented from permeating into the machine shell, and the waterproof effect is improved.

Description

A waterproof rotary encoder Technical Field

[0001] This utility model relates to the field of rotary encoder technology, and in particular to a waterproof rotary encoder. Background Technology

[0002] A rotary encoder is a sensor that converts rotary motion into electrical signals. By detecting the angular displacement, rotational speed, or direction of rotation of a shaft, it outputs standardized pulse or digital signals and is widely used in closed-loop control systems for position and speed.

[0003] Existing rotary encoders typically house the components inside a housing, with one end of the rotating shaft extending out of the housing and connected to the drive shaft of the device under test via a coupling. The drive shaft then rotates the rotating shaft, enabling detection of the drive shaft. However, because the housing end is connected to an end cover, moisture can easily seep into the gap between the end cover and the housing during use, resulting in poor waterproofing. Furthermore, the encoder generally relies solely on natural heat dissipation during operation, leading to insufficient heat dissipation during prolonged and high-speed testing, as the heat generated by the internal components cannot dissipate quickly. Therefore, we propose a waterproof rotary encoder. Summary of the Invention

[0004] The purpose of this invention is to address the aforementioned shortcomings in the existing technology by proposing a waterproof rotary encoder.

[0005] To achieve the above objectives, the present invention adopts the following technical solution: a waterproof rotary encoder is designed, including a housing, a front end cover at one end of the housing, and a rear end cover at the other end of the housing. The surfaces of the front end cover and the rear end cover abut against the end of the housing, and a sealing ring is installed at the surfaces of the front end cover and the rear end cover. Sealing grooves are provided at both ends of the housing. When the surfaces of the front end cover and the rear end cover abut against the end of the housing, one end of the sealing ring extends into the corresponding sealing groove.

[0006] The casing has a coaxial rotating shaft inside. One end of the rotating shaft passes through the front cover, and the other end passes through the rear cover. Both the front and rear covers are rotatably connected to the rotating shaft. A control motherboard is installed on the side of the rear cover. The control motherboard has a cable connected to its terminals. One end of the cable passes through the casing. An LED is installed on the side of the rear cover. An encoder is installed on the side of the rotating shaft. A photodiode is installed on the side of the front cover. The encoder is located between the photodiode and the LED. Both the photodiode and the LED are connected to the control motherboard via wires.

[0007] Several fan blades are installed at one end of the shaft near the rear end cover, and a mounting cover is provided at one end of the rear end cover. The edges of the rear end cover and the mounting cover are both provided with a third rim. The two third rims are connected and the third rims are located inside the mounting cover. One end of the mounting cover is provided with an opening in which a dustproof net is installed.

[0008] An air guide shroud is installed inside the mounting cover. The rotating shaft passes through the air guide shroud, and the air guide shroud is located between the rear end cover and the fan blade. A fourth rim is installed on the edge of the air guide shroud. A receiving groove is opened on the adjacent surfaces of the two third rims. When the adjacent surfaces of the two third rims abut, the fourth rim is located in the receiving groove.

[0009] The outer side of the casing is symmetrically provided with two arc-shaped covers, with the near ends of the two arc-shaped covers abutting each other and forming an accommodating space between them. The casing is located in this space. Air inlets are opened on the sides of one of the third and fourth edges. One end of the air inlet is connected to the inside of the arc-shaped cover. A first edge is installed on the edge of the front cover. A second edge is installed at both ends of the two arc-shaped covers. The first edge and one of the third edges are connected to the corresponding second edge. An exhaust port is opened on the side of the first edge and is connected to the inside of the arc-shaped cover.

[0010] Preferably, each arc-shaped cover has a skirt extending from the adjacent ends, and the two skirts on the same side are fastened by bolts.

[0011] Preferably, each arc-shaped cover has several heat dissipation fins installed on its inner surface, with one end of each fin resting against the side of the casing.

[0012] Preferably, both the casing and the heat sink fins are made of aluminum alloy.

[0013] Preferably, each exhaust vent and each air inlet is aligned with the spacing between two adjacent heat dissipation fins.

[0014] Preferably, the air guide shroud has a conical structure.

[0015] Preferably, mounting holes are provided on one side of the two arc-shaped covers at their adjacent ends, one end of the cable passes through the mounting hole, and a sealing sleeve is installed on the inner wall of the mounting hole, the sealing sleeve is fitted onto the cable and is sealed to the cable.

[0016] The design scheme proposed in this utility model has the following beneficial effects in application:

[0017] 1. By using two sealing rings to cooperate with the corresponding sealing grooves at the ends of the housing, the gaps between the housing and the front and rear covers can be sealed. The gap between the cable and the mounting hole can be sealed by the sealing sleeve, thus preventing external moisture from seeping into the housing and improving the waterproof effect.

[0018] 2. The rotation of the shaft will drive the fan blades to rotate, which will guide the outside air to the air inlet through the air guide shroud. The air passes through the air inlet and is delivered into the arc-shaped shroud. As the air flows inside the arc-shaped shroud, it will cool the heat dissipation fins and the surface of the casing. Then the air will be discharged through the exhaust vent, which can quickly dissipate heat and cool the internal components of the casing, thus improving the heat dissipation effect. Attached Figure Description

[0019] Figure 1 is a structural dispersion diagram of this utility model;

[0020] Figure 2 is a schematic diagram of the structure of this utility model;

[0021] Figure 3 is a structural dispersion diagram of this utility model;

[0022] Figure 4 is a side sectional view of the structure of this utility model.

[0023] In the diagram: 1. First perimeter; 2. Front cover; 3. Shaft; 4. Second perimeter; 5. Arc-shaped cover; 6. Heat dissipation fins; 7. Sealing sleeve; 8. Skirt; 9. Cable; 10. Fan blade; 11. Third perimeter; 12. Receiving groove; 13. Fourth perimeter; 14. Air guide cover; 15. Mounting cover; 16. Dustproof net; 17. Exhaust vent; 18. Sealing ring; 19. Sealing groove; 20. Housing; 21. Light-emitting diode; 22. Control motherboard; 23. Encoder disk; 24. Rear end cover; 25. Air inlet; 26. Mounting hole; 27. Photodiode. Detailed Implementation

[0024] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0025] Referring to Figures 1-4, a waterproof rotary encoder includes a housing 20. One end of the housing 20 is provided with a front cover 2, and the other end of the housing 20 is provided with a rear cover 24. The surfaces of the front cover 2 and the rear cover 24 abut against the ends of the housing 20. Sealing rings 18 are installed at the surfaces of the front cover 2 and the rear cover 24. Sealing grooves 19 are provided at both ends of the housing 20. When the surfaces of the front cover 2 and the rear cover 24 abut against the ends of the housing 20, one end of the sealing ring 18 extends into the corresponding sealing groove 19. In actual use, the gaps between the front cover 2 and the rear cover 24 and the housing 20 can be sealed by the cooperation of the sealing rings 18 and the sealing grooves 19, thus preventing external moisture or water from seeping into the interior of the housing 20.

[0026] As shown in Figures 1 and 4, a rotating shaft 3 is coaxially mounted inside the housing 20. One end of the rotating shaft 3 passes through the front cover 2, and the other end passes through the rear cover 24. Both the front cover 2 and the rear cover 24 are rotatably connected to the rotating shaft 3. A control motherboard 22 is mounted on the side of the rear cover 24. The control motherboard 22 is either a PCB circuit board or a microcontroller circuit board. The terminals of the control motherboard 22 are connected to a cable 9, one end of which passes through the housing 20. A light-emitting diode 21 is mounted on the side of the rear cover 24, and a photodiode 27 is mounted on the side of the front cover 2. The encoder disk 23 is located at the photodiode. The photodiode 27 and the light-emitting diode 21 are connected to the control motherboard 22 via wires. In actual use, one end of the rotating shaft 3 is connected to the drive shaft on the device under test via a coupling. When the drive shaft rotates, it will drive the rotating shaft 3 to rotate, which in turn will drive the encoder disk 23 to rotate relative to the light-emitting diode 21. During the rotation of the encoder disk 23, it will periodically block the light emitted by the light-emitting diode 21. The photodiode 27 can transmit the detection data to the control motherboard 22. The control motherboard 22 can process the data and transmit it to the external device via cable 9.

[0027] As shown in Figures 1 and 3, two arc-shaped covers 5 are symmetrically arranged on the outside of the housing 20. The near ends of the two arc-shaped covers 5 abut each other, and a space is formed between them. The housing 20 is located in this space. A mounting hole 26 is opened on one side of the near ends of the two arc-shaped covers 5. One end of the cable 9 passes through the mounting hole 26, and a sealing sleeve 7 is installed on the inner wall of the mounting hole 26. The sealing sleeve 7 is fitted on the cable 9 and is sealed to the cable 9. In actual use, the gap between the cable 9 and the mounting hole 26 can be sealed by the sealing sleeve 7, so that external moisture will not seep into the interior of the housing 20 through the gap between the cable 9 and the mounting hole 26.

[0028] As shown in Figures 1 and 4, a number of fan blades 10 are installed on one end of the rotating shaft 3 near the rear end cover 24, and a mounting cover 15 is provided at one end of the rear end cover 24. The edges of the rear end cover 24 and the mounting cover 15 are provided with third rims 11. The two third rims 11 are connected and are located inside the mounting cover 15. One end of the mounting cover 15 is provided with an opening, in which a dustproof net 16 is installed. In actual use, the rotation of the rotating shaft 3 will synchronously drive the fan blades 10 to rotate, and the fan blades 10 can draw in external air after filtering through the dustproof net 16 into the mounting cover 15.

[0029] As shown in Figures 1 and 4, an air guide shroud 14 is provided inside the mounting cover 15. The rotating shaft 3 passes through the air guide shroud 14, and the air guide shroud 14 is located between the rear end cover 24 and the fan blade 10. A fourth rim 13 is installed on the edge of the air guide shroud 14. A receiving groove 12 is opened on the adjacent surfaces of the two third rim 11. When the adjacent surfaces of the two third rim 11 abut, the fourth rim 13 is located in the receiving groove 12. The air guide shroud 14 has a conical structure. In actual use, the air drawn into the mounting cover 15 by the fan blade 10 will return to the side of the air guide shroud 14. Under the guiding action of the side of the air guide shroud 14, the air can be guided to the edge of the air guide shroud 14.

[0030] As shown in Figures 1 and 3, air inlets 25 are provided on the sides of one of the third edges 11 and the fourth edge 13. One end of the air inlet 25 is connected to the inside of the arc-shaped cover 5. A first edge 1 is installed on the edge of the front cover 2. A second edge 4 is installed at both ends of the two arc-shaped covers 5. The first edge 1 and one of the third edges 11 are connected to the corresponding second edge 4. An exhaust port 17 is provided on the side of the first edge 1. The exhaust port 17 is connected to the inside of the arc-shaped cover 5. In actual use, the air transported by the fan blades 10 will be guided to the air inlet 25 by the air guide shroud 14, and blown into the inside of the arc-shaped cover 5 through the air inlet 25, blowing away the heat on the surface of the casing 20, and finally being discharged through the exhaust port 17.

[0031] It should be noted that, as shown in Figures 1 and 4, each arc-shaped cover 5 has several heat dissipation fins 6 installed on its inner surface. One end of the heat dissipation fin 6 rests against the side of the casing 20. Each exhaust port 17 and each air inlet 25 is aligned with the spacing between two adjacent heat dissipation fins 6. In actual use, the air passing through the air inlet 25 will flow along the spacing between two adjacent heat dissipation fins 6. During the flow, the heat transferred to the casing 20 and the heat dissipation fins 6 will be cooled, thus accelerating the heat dissipation speed.

[0032] Specifically, in use, the operator places two arc-shaped covers 5 onto the surface of the housing 20 and secures the skirt 8 with bolts. Then, the front cover 2 is placed against one end of the housing 20, causing the first perimeter 1 and the second perimeter 4 to abut and be fixed. Simultaneously, the sealing ring 18 fixed to one side of the front cover 2 moves into the corresponding sealing groove 19 at the end of the housing 20, sealing the gap between the front cover 2 and the housing 20. Next, the rear cover 24 is placed over the other end of the housing 20, causing the sealing ring 18 fixed to the rear cover 24 to move into the corresponding sealing groove 19 at the end of the housing 20, sealing the gap between the rear cover 24 and the housing 20. This completes the sealing process and provides good waterproofing. Then, the operator passes the air guide cover 14 through the rotating shaft 3 and places it against one side of the rear cover 24, causing the fourth perimeter 13 to move into the receiving groove 12 on the third perimeter 11 on the edge of the rear cover 24. Finally, the mounting cover 15 is placed over the rear cover. One end of 24 is positioned so that the third edge 11 of the mounting cover 15 abuts against the third edge 11 of the rear cover 24, and the two third edges 11 are fixed to the second edge 4 at the end of the arc-shaped cover 5 by bolts, thus connecting the rear cover 24, the air guide cover 14 and the mounting cover 15. Then, one end of the rotating shaft 3 is connected to the drive shaft of the device under test through a coupling. When the drive shaft rotates, the rotating shaft 3 will synchronously drive the fan blades 10 to rotate. The fan blades 10 blow the outside air through the dust filter 16 and blow it to the side of the air guide cover 14. Under the action of the air guide cover 14, the air is introduced into the air inlet 25. The air passes through the air inlet 25 and flows between two adjacent heat dissipation fins 6. The heat generated by the internal components of the housing 20 is transferred to the housing 20 and the surface of the heat dissipation fins 6. During the air flow, the air can only cool the housing 20 and the heat dissipation fins 6. Then the air is discharged through the exhaust port 17, which can accelerate the heat dissipation speed and improve the heat dissipation effect.

[0033] Furthermore, as shown in Figures 1 and 2, each arc-shaped cover 5 has a skirt 8 extending from the adjacent ends. Two skirts 8 located on the same side are fastened together by bolts. By fixing the skirts 8 together with bolts, the arc-shaped cover 5 can be fixed to the surface of the housing 20, and the fixation is stable.

[0034] Furthermore, both the housing 20 and the heat dissipation fins 6 are made of aluminum alloy or other hard materials with good thermal conductivity. In this way, the heat generated by the internal components of the housing 20 will be dissipated into the external space through the housing 20 and the heat dissipation fins 6, and cooled by the air blown in by the fan blades 10.

[0035] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. A waterproof rotary encoder, comprising a housing (20), characterized in that: A front cover (2) is provided at one end of the housing (20), and a rear cover (24) is provided at the other end of the housing (20). The surfaces of the front cover (2) and the rear cover (24) abut against the end of the housing (20), and a sealing ring (18) is installed at the surfaces of the front cover (2) and the rear cover (24). A sealing groove (19) is provided at both ends of the housing (20). When the surfaces of the front cover (2) and the rear cover (24) abut against the end of the housing (20), one end of the sealing ring (18) extends into the corresponding sealing groove (19). A rotating shaft (3) is coaxially provided inside the housing (20). One end of the rotating shaft (3) passes through the front cover (2), and the other end of the rotating shaft (3) passes through the rear cover (24). The surfaces of the front cover (2) and the rear cover (24) abut against the end of the housing (20). All are rotatably connected to the rotating shaft (3). A control main board (22) is installed on the side of the rear cover (24). The wiring terminals of the control main board (22) are connected to cables (9). One end of the cables (9) passes through the casing (20). A light-emitting diode (21) is installed on the side of the rear cover (24). An encoder disk (23) is installed on the side of the rotating shaft (3). A photodiode (27) is installed on the side of the front cover (2). The encoder disk (23) is located between the photodiode (27) and the light-emitting diode (21). Both the photodiode (27) and the light-emitting diode (21) are connected to the control main board (22) through wires. Several fan blades (10) are installed on one end of the rotating shaft (3) near the rear cover (24). A mounting cover (15) is provided. The rear end cover (24) and the edge of the mounting cover (15) are both provided with a third rim (11). The two third rims (11) are connected and located inside the mounting cover (15). One end of the mounting cover (15) is provided with an opening, in which a dustproof net (16) is installed. Inside the mounting cover (15) is a guide shroud (14). The rotating shaft (3) passes through the guide shroud (14). The guide shroud (14) is located between the rear end cover (24) and the fan blade (10). The edge of the guide shroud (14) is provided with a fourth rim (13). The adjacent surfaces of the two third rims (11) are provided with receiving grooves (12). When the adjacent surfaces of the two third rims (11) abut, the fourth rim (13) is located in the receiving groove. 12) Inside; two arc-shaped covers (5) are symmetrically arranged on the outside of the casing (20). The near ends of the two arc-shaped covers (5) abut each other and form a space between them. The casing (20) is located in this space. An air inlet (25) is opened on the side of one of the third side (11) and the fourth side (13). One end of the air inlet (25) is connected to the inside of the arc-shaped cover (5). A first side (1) is installed on the edge of the front cover (2). A second side (4) is installed at both ends of the two arc-shaped covers (5). The first side (1) and one of the third side (11) are connected to the corresponding second side (4). An exhaust port (17) is opened on the side of the first side (1). The exhaust port (17) is connected to the inside of the arc-shaped cover (5).

2. A waterproof rotary encoder according to claim 1, characterized in that: Each arc-shaped cover (5) has a skirt (8) extending from the adjacent ends, and the two skirts (8) on the same side are fastened by bolts.

3. A waterproof rotary encoder according to claim 2, characterized in that: Each arc-shaped cover (5) has several heat dissipation fins (6) installed on its inner surface, with one end of the heat dissipation fins (6) abutting against the side of the casing (20).

4. A waterproof rotary encoder according to claim 1, characterized in that: Both the casing (20) and the heat dissipation fins (6) are made of aluminum alloy.

5. A waterproof rotary encoder according to claim 1, characterized in that: Each exhaust vent (17) and each air inlet (25) is aligned with the spacing between the two adjacent heat dissipation fins (6).

6. A waterproof rotary encoder according to claim 1, characterized in that: The air guide shroud (14) has a conical structure.

7. A waterproof rotary encoder according to claim 1, characterized in that: Two arc-shaped covers (5) are provided with mounting holes (26) on one side of their adjacent ends. One end of the cable (9) passes through the mounting hole (26), and a sealing sleeve (7) is installed on the inner wall of the mounting hole (26). The sealing sleeve (7) is fitted onto the cable (9) and is sealed to the cable (9).

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