Angle Encoder Device Based on Vertically Mounted Shaft Sealing Type

Abstract

The present invention discloses an angle encoder device based on a vertically installed shaft seal type, which includes a shaft seal type rotating assembly, a non-contact encoder, a retaining ring, a complete set of positioning elements and a sealing cover; the shaft seal type rotating assembly includes a rotating shaft, a rubber cover sealed bearing, a bearing box, a snap ring, a double-lip stainless steel PTFE skeleton oil seal, a shaft seal cover, and an O-ring. The shaft seal cover is located at the top of the bearing box. The upper rubber cover sealed bearing and the lower rubber cover sealed bearing are fixed to the rotating shaft and the bearing box through interference fit. The double-lip stainless steel PTFE skeleton oil seal is located inside the bearing box and above the upper rubber cover sealed bearing. The rotating shaft passes through the shaft seal cover, the double-lip stainless steel PTFE skeleton oil seal, the upper rubber cover sealed bearing and the lower rubber cover sealed bearing from top to bottom. The device of the present invention has high structural strength, good sealing performance, reliable and stable operation in harsh environments of rain and sand, and its service life can meet the design requirements.

Description

Technical Field

[0001] The present invention relates to the technical field of angle measurement, and particularly to an angle encoder device based on a vertical installation with a shaft seal type. Background Art

[0002] As one of the important devices of a rail rubber-tyred vehicle, the angle encoder has a guide frame on it. When the rubber-tyred vehicle turns, there is a certain angle between two carriages. The two end guide frames will form a certain angle change and conduct it to the rotating shaft. The angle encoder records the angle change and, after conversion, displays the angle between the two carriages in real time. Since the angle encoder is vertically placed at the bottom of the carriage, in rainy and snowy weather conditions, rainwater and sediment will be thrown onto the angle encoder, resulting in the accumulation of rainwater and sediment at the shaft position. Therefore, whether it is the rotation structure, sealing structure, angle recognition structure, etc. of the angle encoder, there are special technical requirements. During the operation of the angle encoder, under the impact and vibration of the vehicle, when the shaft is rotating, the accumulated sediment and rainwater above will seep into the angle encoder through the gaps, causing great harm to the internal bearings and sensor electronic devices inside. As the infiltration of sediment and rainwater continues to increase, it will affect the rusting of the internal bearings and the performance of the internal electronic devices, resulting in failure. Inevitably, the service life of the angle encoder will be greatly reduced.

[0003] A certain domestic unit uses an oil seal sealing type for the angle encoder to meet the sealing of its rotating shaft during operation. Its structure is simple. Under general usage conditions, it is horizontally installed, and its structure can meet the sealing performance requirements of IP67. However, in the vertical installation mode, a small amount of rainwater and sediment accumulates on the upper surface of the oil seal. Under the long-term vibration and impact operating conditions, the sieve effect is likely to cause a gap between the oil seal and the shaft, so that the rainwater and sediment on its surface can enter the device interior along the gap, ultimately leading to the failure of the angle encoder.

[0004] Therefore, the shaft seal design determines the key technical problems of the angle encoder under vertical installation conditions, which directly affects the performance and service life of the angle encoder. Summary of the Invention

[0005] The purpose of the present invention is to overcome the deficiencies of the prior art and provide an angle encoder device based on a vertical installation with a shaft seal type, so that the vertically installed angle encoder in a harsh environment of rain and sand can have high structural strength, good sealing performance, reliable and stable operation, and a service life that can meet the design requirements.

[0006] To achieve the above purpose, the technical solutions adopted by the present invention are as follows:

[0007] An angle encoder device based on a vertically installed shaft seal type, comprising a shaft seal type rotating assembly, a non-contact encoder, a retaining ring, a complete set of positioning elements and a sealing cover;

[0008] The shaft seal type rotating assembly includes a rotating shaft, a rubber cover sealed bearing, a bearing housing, two circlips, a double-lip stainless steel PTFE skeleton oil seal, a shaft seal cover, and an O-ring. The rubber cover sealed bearing includes an upper rubber cover sealed bearing and a lower rubber cover sealed bearing. The two circlips are used to limit the shaft seal cover and the upper rubber cover sealed bearing respectively. The upper circlip for limiting the shaft seal cover is stuck in the groove of the rotating shaft to prevent the shaft seal cover from moving down further under the action of external force, so as to maintain a certain gap between it and the bearing housing, prevent interference during operation, and increase resistance. The lower circlip for limiting the upper rubber cover sealed bearing is stuck in another groove of the rotating shaft to inhibit its possible up and down movement;

[0009] The bearing housing is made of aluminum alloy material. On the premise of not affecting the overall structural performance, the interior of the main body is weight-reduced to achieve the effect of weight reduction of the whole device, reduce the impact of impact and vibration on the installation beam, and achieve the effects of weight reduction and increased overall service life. All threaded connections are fitted with wire thread inserts, which have high connection strength, earthquake resistance, impact resistance and wear resistance, and can disperse stress to protect the matrix thread performance, greatly extending the service life of the matrix. The bearing housing is provided with an annular groove on its annular side. During the installation and disassembly process, the installation fixture is stuck in the annular groove to protect the surface of the bearing housing and ensure the overall coaxiality, which is convenient for operation. An annular groove for fixing the O-ring is provided at the upper end of the bearing housing to ensure that the O-ring will not fall off during the assembly process, and the raised distance also ensures the dynamic seal of the O-ring between the shaft seal cover and the bearing housing. An installation step is provided inside the bearing housing for the installation and positioning of the double-lip stainless steel PTFE skeleton oil seal and the rubber cover sealed bearing.

[0010] The shaft seal cover is located at the top of the bearing housing. The upper rubber cover sealed bearing and the lower rubber cover sealed bearing are fixed to the rotating shaft and the bearing housing through transition fit. The double-lip stainless steel PTFE skeleton oil seal is located inside the bearing housing and above the upper rubber cover sealed bearing, and is fixed by the boss provided on the bearing housing. The rotating shaft passes through the shaft seal cover, the double-lip stainless steel PTFE skeleton oil seal, the upper rubber cover sealed bearing and the lower rubber cover sealed bearing from top to bottom in sequence. The circlip is stuck in the axial groove on the rotating shaft for the positioning of the shaft seal cover. The O-ring is sleeved in the groove at the upper end of the bearing housing and located between the shaft seal cover and the bearing housing to form a dynamic seal,

[0011] The set of positioning elements is fixed to the lower end of the rotating shaft. The protective ring is matched with the set of positioning elements and is located between the bearing housing and the non-contact encoder. The non-contact encoder, the protective ring, and the bearing housing are fixedly connected. The sealing cover is fixedly connected to the bottom surface of the non-contact encoder.

[0012] Further, the lower surface of the lower rubber cover sealed bearing is positioned by the rotating shaft boss, and its upper surface is limited by the lower boss inside the bearing housing. The lower surface of the upper rubber cover sealed bearing is limited by the upper boss inside the bearing housing, and the upper surface of the upper rubber cover sealed bearing is limited by the upper elastic retaining ring. Finally, through the cooperation between the rotating shaft, the elastic retaining ring, and the bearing housing, the effect of preventing the upper and lower rubber cover sealed bearings from generating axial displacement under external force is achieved.

[0013] Further, the shaft sealing cover has a transitional fit with the rotating shaft and is limited by an elastic retaining ring to ensure a gap is maintained between the rotating shaft and the bearing housing, preventing interference and increasing resistance during operation.

[0014] Further, it also includes hexagon socket head cap screws. The set of positioning elements and the rotating shaft are fixedly connected by hexagon socket head cap screws.

[0015] Further, it also includes first combination screws. The sealing cover is fixedly connected to the bottom surface of the non-contact encoder by the first combination screws.

[0016] Further, it also includes second combination screws. The second combination screws pass through the non-contact encoder, the protective ring, and the bearing housing to achieve the fixed connection of the three.

[0017] Further, the hexagon socket head cap screws are M4×20 hexagon socket head cap screws, the first combination screws are M4×10 combination screws, and the second combination screws are M4×50 combination screws.

[0018] Further, the protective ring is an aluminum protective ring.

[0019] According to the above assembly method of the angle encoder device based on the vertical installation with shaft sealing type, it includes the following steps:

[0020] Step 1: Install the rubber cover sealed bearing and the rotating shaft through interference fit, position it by the boss of the rotating shaft, and after assembly, install it into the bearing box through interference fit and position it by the lower boss of the bearing box; install the rubber cover sealed bearing on the rotating shaft through interference fit and position it by the upper inner boss of the bearing box, and the upper surface of the upper rubber cover sealed bearing is limited by the upper elastic retaining ring; install the double-lip stainless steel PTFE skeleton oil seal through the rotating shaft into the positioning hole of the bearing box until it touches the step provided on the bearing box; clamp the shaft elastic washer in the groove of the rotating shaft, and clamp the O-ring in the radial groove of the bearing box; fix the shaft seal cover through interference fit with the rotating shaft and limit it with the elastic washer to ensure a gap is maintained between the rotating shaft and the bearing box, prevent interference during operation, and increase resistance; finally, assemble it into a shaft seal type rotating assembly.

[0021] Step 2: Use M4×20 hexagon socket head cap screws to fix the complete set of positioning elements and the rotating shaft in the shaft seal type rotating assembly, and use a spacer between them to ensure a certain gap between the complete set of positioning elements and the shaft seal type rotating assembly.

[0022] Step 3: Use a protective ring to sleeve between the shaft seal type rotating assembly and the non-contact encoder to ensure there are gaps between the complete set of positioning elements and the upper and lower surfaces, ensure there is no interference during its rotation, use 3 equally spaced M4×50 second combination screws to fasten the non-contact encoder, the protective ring and the bearing box, apply sealant to all mating surfaces to ensure tight combination, use 3 equally spaced M4×10 first combination screws to fix the seal cover on the non-contact encoder, and apply sealant to the mating surface to ensure tight combination.

[0023] Compared with the conventional prior art, the beneficial effects of the present invention are:

[0024] (1) The present invention adopts a specially designed angle encoder device based on a vertically installed shaft seal type. Through the connection relationship, sealing relationship, and mating relationship of each component, the vertically installed angle encoder can have high structural strength, good sealing performance, reliable and stable operation, and its service life can meet the design requirements in a harsh environment of rain and sand.

[0025] (2) The present invention completes the sealing between the seal cover and the bearing box through the O-ring. The O-ring is arranged radially on the bearing box to prevent the siphon effect from allowing water vapor to enter the interior, and also ensure that when the rotating shaft is subjected to a certain radial force, it can buffer and absorb the possible gaps, so that its sealing performance can also be ensured when subjected to radial force.

[0026] (3) The present invention uses interference fit to connect and fix the seal cover and the rotating shaft, and uses a special shaft sealant to fill during the installation and mating to ensure that the rainwater and sediment existing at the upper end of the seal cover will not seep into the interior from its top.

[0027] (4) Inside the sealed box, a double-lip stainless steel PTFE skeleton oil seal is added to block a small amount of water vapor and sediment that may seep in, and the second protection greatly increases its service life. Description of the Drawings

[0028] Figure 1 This is a three-dimensional structural schematic diagram of the angle encoder device based on the vertical installation with shaft seal type of the present invention;

[0029] Figure 2 This is a cross-sectional view of the angle encoder device based on the vertical installation with shaft seal type of the present invention;

[0030] Figure 3 This is an exploded view of the angle encoder device based on the vertical installation with shaft seal type of the present invention;

[0031] Figure 4 This is a three-dimensional structural schematic diagram of the shaft seal type rotating assembly in the angle encoder device based on the vertical installation with shaft seal type of the present invention;

[0032] Figure 5 This is a cross-sectional view of the shaft seal type rotating assembly in the angle encoder device based on the vertical installation with shaft seal type of the present invention.

[0033] In the figure: 1. Shaft seal type rotating assembly; 2. Complete set of positioning elements; 3. Protective ring; 4. Non-contact encoder; 5. Sealing cover; 6. M4×20 hexagon socket head cap screw; 7. M4×10 first combination screw; 8. M4×50 second combination screw; 9. Rotating shaft; 10. Shaft seal cover; 11. Elastic washer; 12. O-ring; 13. Double-lip stainless steel PTFE skeleton oil seal; 14. Rubber cover sealed bearing; 15. Bearing housing. Detailed Description of the Invention

[0034] The following further introduces the present invention in conjunction with the drawings and specific embodiments.

[0035] In order to enable those skilled in the art to better understand the specific implementation of the present invention, the following will further describe and explain the present invention in detail and completely in conjunction with the drawings in the embodiments of the present invention.

[0036] Combined with Figures 1-3 , the present invention is an angle encoder device based on the vertical installation with shaft seal type, including a shaft seal type rotating assembly 1; a complete set of positioning elements 2; an aluminum protective ring 3; a non-contact encoder 4; a sealing cover 5; an M4×20 hexagon socket head cap screw 6; an M4×10 combination screw 7; an M4×50 combination screw 8;

[0037] The complete set of positioning elements 2 clamps the rotating shaft 9 in the rotating assembly 1 of the shaft seal type through the M4×20 socket head cap screws 6. The gap between the complete set of positioning elements 2 and the rotating assembly 1 of the shaft seal type is 2 mm to ensure the synchronization between the complete set of positioning elements 2 and the rotating shaft 9. The aluminum protective ring 3 is sleeved between the rotating assembly 1 of the shaft seal type and the non-contact encoder 4 to ensure that there are gaps between the complete set of positioning elements 2 and the upper and lower surfaces, so as to ensure that there is no interference during rotation. Three evenly distributed M4×50 combination screws 8 are used to fasten the three components. Sealant is applied to all mating surfaces to ensure tight combination and improve its sealing performance. Three evenly distributed M4×10 combination screws 7 are used to fix the seal cover 5 on the non-contact encoder 4. Sealant is applied to the mating surface to ensure tight combination and improve its sealing performance. In this way, a sealed device is combined to achieve the effect of waterproof and dustproof.

[0038] Combination Figures 4-5 , The rotating assembly 1 of the shaft seal type includes: a rotating shaft 9; a shaft seal cover 10; a shaft elastic washer 11; an O-ring 12; a double-lip stainless steel PTFE skeleton oil seal 13; a rubber cover sealed bearing 14; a bearing housing 15;

[0039] The bearing housing 15 is made of aluminum alloy material. On the premise of not affecting the overall structural performance, the interior of the main body is lightened to achieve the effect of weight reduction of the whole device, reduce the impact of shock and vibration on the installation beam, and achieve the effects of weight reduction and increased overall service life. All threaded joints are fitted with wire thread inserts, which have high connection strength, earthquake resistance, shock resistance and wear resistance, and can disperse stress to protect the matrix thread performance, greatly extending the service life of the matrix. A circular groove is provided on the circumferential side of the matrix. During the installation and disassembly process, the installation fixture is stuck in the circular groove to protect the surface of the bearing housing while ensuring the overall coaxiality and facilitating operation. An annular groove for fixing the O-ring 12 is provided at the upper end of the bearing housing 15 to ensure that the O-ring 12 will not fall off during the assembly process, and the raised distance also ensures the dynamic seal of the O-ring between the shaft seal cover 10 and the bearing housing 15. An installation step is provided inside the bearing housing 15 for the installation and positioning of the double-lip stainless steel PTFE skeleton oil seal 13 and the rubber cover sealed bearing 14.

[0040] Two rubber cover sealed bearings 14 are fixed to the rotating shaft 9 and the bearing housing 15 by interference fit. The lower surface of the lower rubber cover sealed bearing 14 is positioned by the boss of the rotating shaft 9, and its upper surface is limited by the lower boss of the bearing housing 15; the lower surface of the upper rubber cover sealed bearing 14 is limited by the upper boss of the bearing housing 15, and its upper surface is limited by the circlip 11, which is stuck in the groove of the rotating shaft 9. Finally, through the cooperation among the three, the effect of preventing the upper and lower rubber cover sealed bearings 14 from generating axial displacement under external force is achieved, and an axial rotating component is formed. The interference fit ensures a certain radial preload among the three and can ensure the concentricity of the rotating shaft 9 during operation. The double-lip stainless steel PTFE skeleton oil seal 13 passes through the rotating shaft 9 and is fixed above the limiting boss of the bearing housing 15 to form an end seal above the rubber cover sealed bearing 14. The shaft circlip 11 is stuck in the groove on the rotating shaft 9 to be used as the positioning of the shaft seal cover 10, so as to keep a gap between the rotating shaft 9 and the bearing housing 15, prevent interference during operation, and increase resistance. At the upper end of the bearing housing 15, there is a groove for installing the O-ring 12 to prevent the O-ring 12 from not being deformed as expected and sleeved between the rotating shaft 9 and the shaft seal cover 10 under the action of axial thrust during the assembly process. The O-ring 12 is sleeved in the groove at the upper end of the bearing housing 15, the shaft seal cover 10 passes through the rotating shaft 9, has an interference fit with the rotating shaft 9, and is limited by the shaft circlip 11, and the O-ring 12 is arranged radially of the bearing housing 15 to complete the seal between the shaft seal cover 10 and the bearing housing 15.

[0041] Assembly process of the device of the present invention:

[0042] Step 1: Install the rubber cover sealed bearing 14 and the rotating shaft 9 by interference fit, position by the boss of the rotating shaft 9, and after assembly, install it into the bearing housing 15 by interference fit and position by the lower boss of the bearing housing 15; install the rubber cover sealed bearing 14 on the rotating shaft 9 by interference fit, position by the inner upper boss of the bearing housing 15, and its upper surface is limited by the circlip 11, which is stuck in the groove of the rotating shaft 9. Finally, through the cooperation among the three, the effect of preventing the upper and lower rubber cover sealed bearings 14 from generating axial displacement under external force is achieved; install the double-lip stainless steel PTFE skeleton oil seal 13 through the rotating shaft 9 into the positioning hole of the bearing housing 15 until it touches the step provided on the bearing housing 15; stick the shaft elastic washer 11 in the groove of the rotating shaft 9, and stick the O-ring 12 in the radial groove of the bearing housing 15; fix the shaft seal cover 10 by interference fit with the rotating shaft 9 and limit it by the shaft elastic washer 11 to ensure a gap between the rotating shaft 9 and the bearing housing 15, prevent interference during operation, and increase resistance; finally, combine them into a shaft seal type rotating assembly 1.

[0043] Step 2: Use an M4×20 hexagon socket head screw 6 to fix the complete set of positioning elements 2 and the rotating shaft 9 in the shaft seal type rotating assembly 1, and use a spacer to ensure a certain gap between the complete set of positioning elements 2 and the shaft seal type rotating assembly 1.

[0044] Step 3: Put an aluminum retaining ring 3 on the shaft seal type rotating assembly 1 and the non-contact encoder 4 to ensure there are gaps between the complete set of positioning elements 2 and the upper and lower surfaces, and ensure there is no interference during rotation. Use three equally spaced M4×50 combination screws 8 to fasten the three components together, apply sealant to all mating surfaces to ensure a tight fit. Use three equally spaced M4×10 combination screws 7 to fix the seal cover 5 on the non-contact encoder 4, and apply sealant to the mating surface to ensure a tight fit.

[0045] Working principle:

[0046] Based on the vertical installation of an angle encoder device with a shaft seal type, the shaft seal cover 10 and the rotating shaft 9 are in a transition fit, and special sealant is used for coating and fitting to complete the installation, so that possible rainwater and sediment on the shaft seal cover cannot enter the interior through the top. The O-ring 12 between the shaft seal cover 10 and the bearing housing 15 is arranged radially in the bearing housing 15 to prevent the siphon effect from allowing water vapor to enter the interior, and also ensure that when the rotating shaft is subjected to a certain radial force, it can absorb the possible gaps generated, so that its sealing performance can be guaranteed when it is subjected to a radial force; the double-lip stainless steel PTFE skeleton oil seal 13 is used to block a small amount of water vapor and sediment that may penetrate, providing a second layer of protection for the entire device; the rubber-covered sealed bearing 14 is used, which has excellent waterproof and dustproof performance and becomes the third layer of protection for the entire device.

[0047] The entire device is vertically installed at the bottom between the two carriages of the rubber-tired vehicle. In rainy weather, the wheels will splash rainwater and sediment onto the angle encoder device. The rotating shaft 9 is equipped with a guide frame. During the operation of the rubber-tired vehicle, there will also be impacts and vibrations, and as the vehicle turns, the guide frame will generate a certain radial force, acting on the angle encoder device, ultimately causing the rotating shaft to have a certain eccentricity during operation. The O-ring 12 between the shaft seal cover 10 and the bearing housing 15 absorbs the position generated by the eccentricity, ensuring its sealing performance. At the same time, under normal circumstances, the rotating shaft 9 returns to its initial position under the action of the self-aligning ability of the rubber-covered sealed bearing 14.

[0048] Obviously, the embodiments described above are only partial examples of the present invention, rather than all embodiments. According to the above invention content, relevant staff can completely make various changes and modifications within the scope of not deviating from the technical idea of the present invention, including modifications to its structure size and the use of selected materials, etc. The technical scope of the present invention is not limited to the content described in the specification, and its technical scope must also be determined according to the scope of the claims in practical engineering applications.

Claims

1. An angular encoder device based on a vertically installed shaft seal type, characterized in that, it includes a shaft seal type rotating assembly (1), a non-contact encoder (4), a retaining ring (3), a complete set of positioning elements (2) and a sealing cover (5); The shaft seal type rotating assembly includes a rotating shaft (9), a rubber cover sealed bearing (14), a bearing housing (15), two snap rings (11), a double-lip stainless steel PTFE skeleton oil seal (13), a shaft seal cover (10), and an O-ring (12). The rubber cover sealed bearing (14) includes an upper rubber cover sealed bearing and a lower rubber cover sealed bearing. The two snap rings (11) are used to limit the shaft seal cover (10) and the upper rubber cover sealed bearing respectively. Among them, the upper snap ring (11) that limits the shaft seal cover (10) is stuck in the groove of the rotating shaft (9) to prevent the shaft seal cover (10) from moving downward under the action of external force, so as to keep a certain gap between it and the bearing housing (15) to prevent interference during operation. Among them, the lower snap ring (11) that limits the upper rubber cover sealed bearing is stuck in another groove of the rotating shaft (9) to inhibit its possible up and down movement; The bearing housing (15) is made of aluminum alloy material. The bearing housing (15) is provided with an annular groove on its annular side, and an annular groove for fixing the O-ring (12) is provided at the upper end of the bearing housing (15) to ensure that the O-ring (12) will not fall off during the assembly process, and the raised distance also ensures that the O-ring (12) forms a dynamic seal between the shaft seal cover (10) and the bearing housing (15). The inside of the bearing housing (15) is provided with an installation step for the installation and positioning of the double-lip stainless steel PTFE skeleton oil seal (13) and the rubber cover sealed bearing (14); The shaft seal cover (10) is located at the top of the bearing housing (15). The upper rubber cover sealed bearing and the lower rubber cover sealed bearing are fixed to the rotating shaft (9) and the bearing housing (15) through interference fit. The double-lip stainless steel PTFE skeleton oil seal (13) is located inside the bearing housing (15) and above the upper rubber cover sealed bearing, and is fixed by the boss provided on the bearing housing (15). The rotating shaft (9) passes through the shaft seal cover (10), the double-lip stainless steel PTFE skeleton oil seal (13), the upper rubber cover sealed bearing and the lower rubber cover sealed bearing from top to bottom in sequence. The snap ring (11) is stuck in the axial groove on the rotating shaft (9) for the positioning of the shaft seal cover (10). The O-ring (12) is sleeved in the groove at the upper end of the bearing housing (15) and is located between the shaft seal cover (10) and the bearing housing (15) to form a dynamic seal, The complete set of positioning elements (2) is fixed to the lower end of the rotating shaft (9). The retaining ring (3) is matched with the complete set of positioning elements and is located between the bearing housing (15) and the non-contact encoder (4). The non-contact encoder (4), the retaining ring (3) and the bearing housing (15) are fixedly connected. The sealing cover (5) is fixedly connected to the bottom surface of the non-contact encoder (4).

2. The angular encoder device based on a vertically installed shaft seal type according to claim 1, It is characterized in that the lower surface of the lower rubber cover sealed bearing is positioned by the boss of the rotating shaft (9), its upper surface is limited by the lower boss in the bearing box (15), the lower surface of the upper rubber cover sealed bearing is limited by the upper boss in the bearing box (15), and the upper surface of the upper rubber cover sealed bearing is limited by the upper elastic retaining ring (11). Finally, through the cooperation among the rotating shaft (9), the elastic retaining ring (11) and the bearing box (15), the effect of preventing the upper and lower rubber cover sealed bearings from generating axial displacement under external force is achieved.

3. The angle encoder device based on the vertical installation with shaft seal type according to claim 1, It is characterized in that the shaft seal cover (10) is in transitional fit with the rotating shaft (9) and is limited by the elastic retaining ring (11) to ensure a gap is maintained between the rotating shaft and the bearing box, prevent interference during operation, and increase resistance.

4. The angle encoder device based on the vertical installation with shaft seal type according to any one of claims 1-3, It is characterized in that it further includes an internal hexagon screw (6), and the complete set of positioning elements (2) and the rotating shaft (9) are fixedly connected by the internal hexagon screw (6).

5. The angle encoder device based on the vertical installation with shaft seal type according to claim 4, It is characterized in that it further includes a first combination screw (7), and the seal cover (5) is fixedly connected to the bottom surface of the non-contact encoder (4) by the first combination screw (7).

6. The angle encoder device based on the vertical installation with shaft seal type according to claim 5, It is characterized in that it further includes a second combination screw (8), and the second combination screw (8) passes through the non-contact encoder (4), the protective ring (3) and the bearing box (15) to realize the fixed connection of the three.

7. The angle encoder device based on the vertical installation with shaft seal type according to claim 6, It is characterized in that the internal hexagon screw (6) is an M4×20 internal hexagon screw, the first combination screw (7) is an M4×10 combination screw, and the second combination screw (8) is an M4×50 combination screw.

8. The angle encoder device based on the vertical installation with shaft seal type according to claim 7, It is characterized in that the protective ring (3) is an aluminum protective ring.

9. The assembly method of the angle encoder device based on the vertical installation with shaft seal type according to any one of claims 1-8, It is characterized in that it includes the following steps: Step 1: Install the rubber seal type bearing (14) and the rotating shaft (9) by interference fit, position it by the boss of the rotating shaft (9), and after assembly, install it into the bearing housing (15) by interference fit and position it by the lower boss of the bearing housing (15); install the rubber seal type bearing (14) on the rotating shaft (9) by interference fit and position it by the inner upper boss of the bearing housing (15), and limit the upper surface of the upper rubber seal type bearing with the upper snap ring (11); install the double-lip stainless steel PTFE skeleton oil seal (13) through the rotating shaft (9) into the positioning hole of the bearing housing (15) until it touches the step provided on the bearing housing (15); snap the snap ring (11) into the groove of the rotating shaft (9), and snap the O-ring (12) into the radial groove of the bearing housing (15); install the shaft seal cover (10) by interference fit with the rotating shaft (9) and fix it with the snap ring (11) as the limit to ensure a gap between the rotating shaft (9) and the bearing housing (15) to prevent interference and increase resistance during operation; finally, assemble it into the shaft seal type rotating assembly (1); Step 2: Use the M4×20 socket head cap screw (6) to fix the complete set of positioning elements (2) and the rotating shaft (9) in the shaft seal type rotating assembly (1), and use a spacer between them to ensure a certain gap between the complete set of positioning elements (2) and the shaft seal type rotating assembly (1); Step 3: Put the retaining ring (3) on the shaft seal type rotating assembly (1) and the non-contact encoder (4) to ensure there are gaps between the complete set of positioning elements (2) and the upper and lower surfaces to ensure no interference during rotation. Use 3 equally spaced M4×50 second combination screws (8) to fasten the non-contact encoder (4), the retaining ring (3) and the bearing housing (15). Apply sealant to all mating surfaces to ensure a tight fit. Use 3 equally spaced M4×10 first combination screws (7) to fix the seal cover (5) on the non-contact encoder (4), and apply sealant to the mating surface to ensure a tight fit.

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