Wheel edge inner sealing combination structure of electric wheel and operation machine

Abstract

The invention relates to the technical field of operation machinery, in particular to a wheel edge inner sealing combination structure of an electric wheel and the operation machinery, and the wheel edge inner sealing combination structure of the electric wheel comprises a motor rack arranged on the operation machinery and used for installing a hub; the first floating seal seat is connected to the motor rack, and the second floating seal seat is connected to the hub; the first sealing part is arranged on the inner sides of the first floating seal seat and the second floating seal seat, and the first sealing part comprises a floating ring and a floating ring; and the second sealing part comprises a sealing ring, and the sealing ring is arranged between the hub and the side end of the motor rack. According to the scheme, the defect of leakage of wheel edge sealing in the prior art is overcome, and the more reliable sealing effect is achieved.

Description

Technical Field

[0001] The invention relates to the technical field of operating machinery, and in particular to a wheel edge inner seal combination structure of an electric wheel and an operating machinery. Background Art

[0002] The mining environment is harsh, full of dust, sand and other impurities, with drastic temperature changes and high working humidity. These environmental conditions place extremely high demands on the sealing performance of operating machinery. The lubrication system of operating machinery often uses grease or oil for lubrication, and sealing is the key link to ensure that the lubricating working fluid is not lost and prevent external impurities from entering.

[0003] At present, the sealing structure design of engineering machinery and heavy-duty axles generally uses combined oil seals, box oil seals and other structures with good waterproof and anti-sand performance. However, even so, there is still a phenomenon that the wheel side seal leakage problem cannot be completely solved. Summary of the invention

[0004] The present invention provides a wheel edge inner seal combination structure of an electric wheel and an operating machine, which are used to solve the defect of wheel edge seal leakage in the prior art and achieve a more reliable sealing effect.

[0005] The present invention provides a wheel edge inner seal combination structure of an electric wheel, comprising: a motor frame, which is arranged on an operating machine and is used to install a wheel hub; a first floating seal seat and a second floating seal seat, wherein the first floating seal seat is connected to the motor frame, and the second floating seal seat is connected to the wheel hub; a first sealing part, which is arranged on the inner sides of the first floating seal seat and the second floating seal seat, and the first sealing part includes a floating ring and a floating ring; a second sealing part, wherein the second sealing part includes a sealing ring, and the sealing ring is arranged between the wheel hub and the side end of the motor frame.

[0006] According to an inner seal combination structure of a wheel rim of an electric wheel of the present invention, the second sealing portion includes a labyrinth structure located outside the sealing ring; the labyrinth structure is formed by the staggered matching of grooves respectively arranged on the opposite sides of the motor frame and the wheel hub.

[0007] According to the wheel edge inner seal assembly structure of an electric wheel of the present invention, the sealing ring is installed on the inner cavity stop journal of the wheel hub; the lip of the sealing ring is interference fit with the side end face of the frame.

[0008] According to an inner seal assembly structure of a wheel edge of an electric wheel of the present invention, a layer of grease is coated on the lip of the sealing ring, and / or a lubricating liquid is coated on the side end face of the motor frame in contact with the lip of the sealing ring; the roughness of the side end face of the motor frame is less than or equal to 3.2 microns, and the verticality grade of the motor frame is above grade 9.

[0009] According to an inner seal combination structure of a wheel edge of an electric wheel of the present invention, the first floating seal seat is detachably mounted on the motor frame by connecting bolts, and the second floating seal seat is detachably mounted on the wheel hub by connecting bolts; the first floating seal seat and the second floating seal seat are respectively sealed with end face rings with the motor frame and the wheel hub.

[0010] According to the wheel edge inner seal assembly structure of the electric wheel of the present invention, the end face ring and the floating ring are both made of nitrile rubber.

[0011] According to an inner seal combination structure of a wheel edge of an electric wheel of the present invention, the runout of the groove slope of the first floating seal seat and the second floating seal seat is less than or equal to 0.1 mm; the surface roughness of the groove slope is greater than or equal to 3.2 microns and less than or equal to 12.5 microns; after the first sealing part is installed in place, the parallelism deviation between the sealing surface of the floating seal ring of the first sealing part and the installation reference plane of the floating seal seat is less than or equal to 1 / 1500 of the outer diameter of the floating seal ring.

[0012] According to the wheel edge inner seal assembly structure of an electric wheel of the present invention, the floating ring in the first sealing part is made of alloy cast iron, and the hardness of the floating ring is HRC57-64.

[0013] According to the present invention, the wheel edge inner seal assembly structure of an electric wheel also includes an inner bearing, and the motor frame and the wheel hub are assembled in place through the inner bearing; the inner bearing is located on the inner side of the first sealing part.

[0014] The present invention also provides a working machine, comprising the wheel edge inner seal combination structure of the electric wheel of the above embodiment.

[0015] The wheel edge inner seal combination structure and operating machine provided by the present invention effectively enhance the sealing effect by means of the first sealing part in the first floating seal seat and the second floating seal seat arranged between the motor frame and the wheel hub, and the sealing ring in the second sealing part. The floating ring and the floating ring in the first sealing part can adapt to the tiny displacement generated when the wheel hub moves, maintain close contact, and prevent the intrusion of impurities such as dust and mud; while the sealing ring in the second sealing part further improves the sealing performance, ensuring that a good sealing state can be maintained even in harsh working environments, thereby extending the maintenance cycle and service life of the equipment, and ensuring the stable operation of the operating machine in complex environments. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the technical solutions in the present invention or the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0017] Figure 1 It is a schematic cross-sectional structural diagram of the wheel edge inner sealing combined structure of the electric wheel provided by the present invention.

[0018] Figure 2 yes Figure 1 A partial enlarged view of .

[0019] Reference numerals: 1. Motor frame; 2. End face ring; 3. Connecting bolts; 4. First floating seal seat; 5. Sealing ring; 6. Wheel hub; 7. Second floating seal seat; 8. Floating ring; 9. Floating ring; 10. Inner bearing. DETAILED DESCRIPTION

[0020] In order to make the purpose, technical solution and advantages of the present invention clearer, the technical solution of the present invention will be clearly and completely described below in conjunction with the drawings of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0021] In the description of the embodiments of the present invention, it should be noted that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the embodiments of the present invention and simplifying the description, rather than indicating or implying that the devices or elements referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limitations on the embodiments of the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance. It should also be noted that in the description of the present invention, unless otherwise clearly specified and limited, the terms "set", "install", and "connect" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection. For those skilled in the art, the specific meanings of the above terms in the present invention can be understood according to the specific circumstances.

[0022] Combine the following Figure 1-Figure 2 The specific implementation of the wheel edge inner seal assembly structure of the electric wheel of the present invention is described.

[0023] The present invention provides a wheel edge inner seal combination structure of an electric wheel, comprising: a motor frame 1, which is arranged on an operating machine and is used to install a wheel hub 6; a first floating seal seat 4 and a second floating seal seat 7, wherein the first floating seal seat 4 is connected to the motor frame 1, and the second floating seal seat 7 is connected to the wheel hub 6; a first sealing portion, which is arranged inside the first floating seal seat 4 and the second floating seal seat 7, and the first sealing portion includes a floating ring 8 and a floating ring 9; a second sealing portion, wherein the second sealing portion includes a sealing ring 5, and the sealing ring 5 is arranged between the wheel hub 6 and the side end of the motor frame 1. The sealing ring 5 is preferably a VD-shaped rubber sealing ring. The wheel edge inner seal combination structure of the electric wheel effectively enhances the sealing effect by the first sealing portion in the first floating seal seat 4 and the second floating seal seat 7 between the motor frame 1 and the wheel hub 6 and the sealing ring 5 in the second sealing portion.

[0024] Specifically, the first sealing part is preferably composed of a floating ring 8 and a floating ring 9 in pairs. A pair of the first sealing part on the left side is pressed into the inner cavity of the first floating seal seat 4 with a special tool, and a pair of the first sealing part on the right side is pressed into the inner cavity of the second floating seal seat 7 with a special tool. Before pressing, the cleanliness of all parts must be ensured, and no oil stains or burrs are allowed to exist, so as to ensure the effective sealing performance of the first sealing part. The first floating seal seat 4, the second floating seal seat 7 and the first sealing part together constitute the sealing structure of the first sealing part. This design can not only prevent the leakage of internal lubricating oil, but also effectively prevent dirt such as mud, water, sand and soil in the external environment from invading the interior of the mechanical equipment.

[0025] In addition, the floating seal seat is preferably designed as a special part. This is because once it is damaged, the replacement cost is high, so the design focuses on easy maintenance and easy manufacturing. The second sealing structure is composed of the motor frame 1, the sealing ring 5, and the hub 6. The setting of the sealing ring 5 further improves the overall sealing performance, provides an additional layer of protection for the equipment, ensures that it can operate normally under various harsh conditions, reduces the maintenance frequency and prolongs the service life of the equipment.

[0026] According to an electric wheel inner seal combination structure of the present invention, the second sealing part preferably also includes a labyrinth structure, which is located outside the sealing ring 5. The labyrinth structure is formed by the staggered matching of grooves respectively arranged on the opposite sides of the motor frame 1 and the wheel hub 6. Among them, the labyrinth structure is designed to reduce the possibility of large particles of debris, mud and other pollutants entering the interior through multiple layers of tortuous paths before they directly contact the first sealing part. The staggered matching of the grooves on both sides of the labyrinth structure requires any impurities trying to enter to go through a complex path, increasing the probability of being intercepted, thereby protecting the internal first sealing part from damage.

[0027] In addition, the sealing ring 5 is arranged between the labyrinth structure and the first sealing part, which not only plays the role of end face sealing, but also effectively prevents dust and other fine particles from entering. The sealing ring 5 can simultaneously meet the sealing requirements of different media such as oil, water and air, increasing the sealing reliability of the entire system, so that the internal sealing combination structure of the present invention can keep the inside of the equipment clean while ensuring the stable operation of the equipment in various harsh environments. In summary, the organic combination of the labyrinth structure, the auxiliary seal of the sealing ring 5 and the structure of the first sealing part significantly improves the sealing performance and durability of the operating machinery.

[0028] According to the wheel edge inner seal assembly structure of an electric wheel of the present invention, the sealing ring 5 is installed on the inner cavity stopper journal of the wheel hub 6; the lip of the sealing ring 5 is interference fit with the side end face of the frame. Due to the interference fit, the sealing ring will produce a certain elastic deformation due to being squeezed, thereby forming a tight sealing surface, which can not only effectively prevent external impurities such as mud, dust, etc. from entering the interior of the equipment, but also prevent the lubricating oil inside the equipment from leaking, ensuring the normal operation of the equipment. Among them, the sealing ring 5 is preferably as follows Figure 1 The VD-shaped rubber seal shown in the figure can automatically adjust the contact pressure between the lip and the sealing surface under pressure due to its shape design, ensuring that good sealing performance can be maintained even in the event of vibration or slight displacement during the operation of the equipment. In addition, this type of seal usually has good wear resistance and aging resistance, and can maintain its sealing function for a long time, reducing the maintenance frequency and extending the service life of the equipment. Therefore, this sealing structure not only improves the reliability and efficiency of the operating machinery, but also reduces the downtime caused by maintenance.

[0029] Preferably, a pair of first sealing parts on the left side are installed in the inner cavity of the first floating seal seat 4, and a pair of first sealing parts on the right side are installed in the inner cavity of the second floating seal seat 7. The sealing ring 5 is installed on the shaft neck of the stop end of the inner cavity of the hub 6, which can ensure that the first sealing part maintains a good sealing effect within the entire working range. The two sides of the first sealing part are tightly combined with the first floating seal seat 4 and the second floating seal seat 7 respectively. Through the interaction between the floating ring 8 and the floating ring 9, the sealing surface can maintain good contact even when the hub 6 undergoes a slight displacement.

[0030] According to an electric wheel inner seal assembly structure of the present invention, the lip of the sealing ring 5 is coated with a layer of grease, and / or the side end face of the motor frame 1 in contact with the lip of the sealing ring 5 is coated with lubricating liquid; the roughness of the side end face of the motor frame 1 is less than or equal to 3.2 microns, and the verticality level of the motor frame 1 is above level 9. The above lubrication scheme ensures smooth contact of the sealing ring 5 during assembly and long-term operation, avoids dry friction between the lip and the side end face of the motor frame 1, reduces wear, and extends the service life of the sealing ring. At the same time, proper lubrication also helps the sealing ring to better perform its sealing function, further enhancing its ability to prevent impurities such as mud, dust, etc. from entering the interior of the equipment.

[0031] Specifically, the roughness of the side end face of the motor frame 1 is preferably controlled to be less than or equal to 3.2 microns, which can reduce the friction resistance when contacting the lip of the sealing ring 5, and is also conducive to maintaining good sealing performance. The verticality level of the motor frame 1 is preferably above level 9, and the close fit between the lip of the sealing ring and the side end face of the motor frame 1 is ensured through a high-precision manufacturing process, reducing the risk of leakage caused by manufacturing errors.

[0032] According to an inner seal combination structure of the wheel edge of an electric wheel of the present invention, the first floating seal seat 4 is detachably mounted on the motor frame 1 by means of the connecting bolts 3, and the second floating seal seat 7 is detachably mounted on the wheel hub 6 by means of the connecting bolts 3; the first floating seal seat 4 and the second floating seal seat 7 are respectively sealed with the motor frame 1 and the wheel hub 6 by means of the end face ring 2. Among them, the end face ring 2 is preferably installed in the rectangular groove of the first floating seal seat 4 and is fastened to the motor frame 1 by means of the connecting bolts 3; the end face ring 2 is preferably also installed on the stopper of the second floating seal seat 7 and is fastened to the wheel hub 6 by means of the connecting bolts 3. Before assembly, it is necessary to ensure the cleanliness of the end face ring 2 and its installation position, and there should be no burrs or other foreign matter to avoid affecting the sealing effect. In order to further improve the sealing performance and facilitate installation, lubricating oil can be appropriately applied to the end face ring 2 or the installation stopper.

[0033] Through the wheel edge inner seal combination structure of the electric wheel of the above-mentioned embodiment, the connection between the first floating seal seat 4 and the second floating seal seat 7 and the motor frame 1 and the wheel hub 6 is not only stable and reliable, but also can effectively prevent the leakage of lubricating oil and the intrusion of external impurities. The end ring 2 is an important sealing element, and its axial sealing performance ensures the sealing of the entire structure. In addition, the design of the connecting bolt 3 allows the floating seal seat to be easily disassembled for inspection or replacement when necessary, thereby simplifying the maintenance process and improving the maintainability of the equipment. This detachable connection method not only facilitates daily maintenance, but also reduces the downtime caused by sealing failure, thereby improving the operating efficiency and reliability of the operating machinery.

[0034] According to the wheel edge inner seal assembly structure of an electric wheel of the present invention, the end face ring 2 and the floating ring 8 are preferably made of nitrile rubber. Nitrile rubber (NBR) is a material widely used in seals because of its good oil resistance, wear resistance and anti-aging properties, and is suitable for a variety of working environments. In particular, in mining machinery, nitrile rubber can well resist the erosion of lubricating oil and other oil-based media, maintain its elasticity and sealing performance, thereby ensuring the long-term effectiveness of the sealing structure.

[0035] In the present invention, the selection of nitrile rubber as the material of the end ring 2 and the floating ring 8 is mainly the result of comprehensive consideration of factors such as the specific structural design of the reducer, the operating conditions, the amount of oil added, the working environment and the temperature range. Nitrile rubber can maintain its physical properties within a wide temperature range. For the application scenario of the present invention, it can adapt to the temperature changes commonly seen in mining operations. At the same time, it has good chemical stability and is not easily corroded by oil media, which makes it an ideal choice of sealing material. It is understandable that, based on the structural design of the reducer, the operating conditions, the amount of oil added, the environment and the temperature, the above-mentioned O-ring material can also be selected from hydrogenated nitrile rubber, fluororubber, etc. to adapt to different operating temperatures and scenarios.

[0036] According to the wheel edge inner seal combination structure of an electric wheel of the present invention, the runout of the groove bevel of the first floating seal seat 4 and the second floating seal seat 7 is less than or equal to 0.1 mm; the surface roughness of the groove bevel is greater than or equal to 3.2 microns and less than or equal to 12.5 microns; after the first sealing part is installed in place, the parallelism deviation between the sealing surface of the floating seal ring of the first sealing part and the installation reference surface of the floating seal seat is less than or equal to 1 / 1500 of the outer diameter of the floating seal ring. This embodiment ensures the sealing performance of the first sealing part after installation. First, by controlling the runout of the groove bevel of the floating seal seat within 0.1 mm, it can be ensured that the first sealing part will not be displaced or misaligned due to the irregularity of the groove during the installation process, thereby ensuring the reliability and consistency of the seal. Secondly, the surface roughness of the groove bevel is controlled between 3.2 and 12.5 microns. Such roughness can not only ensure good contact between the oil seal and the groove, but also reduce impurities or wear introduced due to excessive surface roughness, further improving the sealing effect.

[0037] Preferably, after the first sealing part is installed in place, it is also necessary to check the parallelism deviation between the sealing surface of the floating seal ring of the first sealing part and the installation reference surface of the floating seal seat, which is required not to exceed 1 / 1500 of the outer diameter of the floating seal ring, so as to ensure that the first sealing part can maintain a stable sealing state under actual working conditions and avoid leakage problems caused by the inclination of the sealing surface. After the first sealing part is installed, it is preferred to evenly apply lubricating oil on the sealing surface to reduce friction, increase the life of the sealing ring, and ensure its smooth movement during operation. Through the above scheme, the wheel edge inner seal combination structure of the electric wheel of the present invention can maintain good sealing performance in harsh environments such as mines, reduce maintenance times, and extend the service life of the equipment.

[0038] The floating ring 9 of the first sealing part can be made of alloy cast iron, molded tool steel, bearing steel, etc. Preferably, according to the wheel edge inner seal combination structure of an electric wheel of the present invention, the floating ring 9 in the first sealing part is made of alloy cast iron, and the hardness of the floating ring 9 is HRC57-64. The alloy cast iron is selected as the material of the floating ring 9, which has high hardness and good wear resistance, so that the floating ring 9 can maintain its shape and function under high pressure and high-speed rotation, and is not easy to wear or damage. Specifically, in terms of hardness index, the hardness range of HRC57-64 ensures that the floating ring 9 can effectively resist the erosion of external impurities when facing the harsh environment commonly seen in mining operations, while maintaining good cooperation with the floating ring 8 to ensure sealing performance. In practical applications, the high hardness and wear resistance of the floating ring 9 can significantly increase the service life of the first sealing part and reduce the sealing failure caused by wear. In addition, the alloy cast iron material also has good toughness and impact resistance, which can absorb and alleviate the impact and vibration that may be encountered under complex working conditions to a certain extent, thereby further improving the reliability and stability of the sealing structure.

[0039] According to the present invention, an inner seal assembly structure of the wheel edge of an electric wheel also includes an inner bearing 10. The motor frame 1 and the wheel hub 6 are assembled in place through the inner bearing 10 to ensure accurate alignment and smooth rotation between the motor frame 1 and the wheel hub 6; the inner bearing 10 is located on the inner side of the first sealing part, which helps the sealing surface of the first sealing part to maintain close contact, thereby ensuring its good sealing performance.

[0040] When the motor frame 1 and the wheel hub 6 are assembled in place through the inner bearing 10, the inner bearing 10 not only supports the weight of the wheel hub 6, but also ensures the rotation accuracy and stability of the wheel hub 6. The correct assembly of the inner bearing 10 directly affects the contact pressure and sealing effect between the dynamic ring and the static ring in the first sealing part. The oil film formed when the sealing surfaces of the dynamic ring and the static ring rotate relative to each other can significantly reduce the friction between the two, reduce wear, and ensure the long-term reliability and stability of the sealing structure.

[0041] During the assembly process, it is necessary to operate smoothly and gently to avoid any damage to the sealing surface. The assembly of the inner bearing 10 should be carried out strictly in accordance with the specifications to ensure that no external force directly acts on the sealing surface to avoid damaging the integrity of the sealing surface. In this way, not only can the sealing performance of the first sealing part after installation be guaranteed, but also the service life of the entire sealing system can be extended.

[0042] The wheel edge inner seal combination structure of the electric wheel of the present invention can effectively prevent the leakage of lubricating oil and prevent external dirt such as mud, water, sand and soil from invading the interior of the equipment through reasonable design and careful assembly. The first seal part is not only simple in structure, but also has the characteristics of being resistant to pollution, wear, vibration, movement, swing and impact, ensuring the working reliability of the operating machinery under complex working conditions and improving the operating efficiency and maintenance cycle of the equipment.

[0043] The present invention also provides a working machine, comprising the wheel edge inner seal combination structure of the electric wheel of the above-mentioned embodiment. In the embodiment of the present invention, the type of the working machine is not limited. For example, the working machine may be an excavator, a crane, a loader, an engineering machinery axle, a heavy mining truck, etc. In other words, as long as the working machine can use the wheel edge inner seal combination structure of the electric wheel of the present invention. By adopting the wheel edge inner seal combination structure of the electric wheel of the present invention, the working machine can maintain higher reliability and longer service life in harsh working environments, reduce maintenance and downtime caused by seal failure, thereby improving work efficiency and economic benefits.

[0044] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "mode", "specific mode", or "some modes" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or mode are included in at least one embodiment or mode of the embodiment of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or mode. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or modes in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or modes described in this specification and the features of the different embodiments or modes, without contradiction.

[0045] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A wheel edge inner seal assembly structure of an electric wheel, characterized in that: include: Motor frame (1); A first floating seal seat (4) and a second floating seal seat (7), wherein the first floating seal seat (4) is connected to the motor frame (1), and the second floating seal seat (7) is connected to the wheel hub (6); A first sealing portion, arranged inside the first floating seal seat (4) and the second floating seal seat (7), the first sealing portion comprising a floating ring (8) and a floating ring (9); A second sealing portion, wherein the second sealing portion comprises a sealing ring (5), and the sealing ring (5) is arranged between the wheel hub (6) and a side end of the motor frame (1).

2. The wheel edge inner seal assembly structure of the electric wheel according to claim 1, characterized in that: The second sealing portion comprises a labyrinth structure and is located outside the sealing ring (5); The labyrinth structure is formed by interlaced matching of grooves respectively arranged on opposite sides of the motor frame (1) and the wheel hub (6).

3. The wheel edge inner seal assembly structure of the electric wheel according to claim 1, characterized in that: The sealing ring (5) is mounted on the inner cavity stop journal of the wheel hub (6); The lip of the sealing ring (5) is interference fit with the side end surface of the frame (1).

4. The wheel edge inner seal assembly structure of the electric wheel according to claim 3, characterized in that: The lip of the sealing ring (5) is coated with a layer of grease, and / or the side end surface of the motor frame (1) in contact with the lip of the sealing ring (5) is coated with lubricating liquid; The roughness of the side end surface of the motor frame (1) is less than or equal to 3.2 micrometers, and the verticality level of the motor frame (1) is above level 9.

5. The wheel edge inner seal assembly structure of the electric wheel according to claim 1, characterized in that: The first floating seal seat (4) is detachably mounted on the motor frame (1) via connecting bolts (3), and the second floating seal seat (7) is detachably mounted on the wheel hub (6) via connecting bolts (3); The first floating seal seat (4) and the second floating seal seat (7) are sealed with the motor frame (1) and the wheel hub (6) respectively using end face rings (2).

6. The wheel edge inner seal assembly structure of the electric wheel according to claim 5, characterized in that: The end face ring (2) and the floating ring (8) are both made of nitrile rubber.

7. The wheel edge inner seal assembly structure of the electric wheel according to claim 1, characterized in that: The runout of the groove slope of the first floating seal seat (4) and the second floating seal seat (7) is less than or equal to 0.1 mm; The surface roughness of the groove slope is greater than or equal to 3.2 microns and less than or equal to 12.5 microns; After the first sealing part is installed in place, the parallelism deviation between the sealing surface of the floating seal ring of the first sealing part and the installation reference surface of the floating seal seat is less than or equal to 1 / 1500 of the outer diameter of the floating seal ring.

8. The wheel edge inner seal assembly structure of the electric wheel according to claim 1, characterized in that: The floating ring (9) in the first sealing portion is made of alloy cast iron, and the hardness of the floating ring (9) is HRC57-64.

9. The wheel edge inner seal assembly structure of the electric wheel according to any one of claims 1 to 8, characterized in that: It also includes an inner bearing (10), through which the motor frame (1) and the wheel hub (6) are assembled in place; the inner bearing (10) is located on the inner side of the first sealing portion.

10. A working machine, characterized in that: A wheel rim inner seal combined structure comprising the electric wheel as claimed in any one of claims 1 to 9.

Images