Transmission structure and mechanical equipment

Abstract

The application relates to the technical field of mechanical transmission, and provides a transmission structure and a mechanical equipment, the transmission structure comprising a rotating shaft system and a rotating system. The rotating system is sleeved on the rotating shaft system to form a lubricant cavity; on the same side of the lubricant cavity, at least two sealing assemblies are arranged between the rotating system and the rotating shaft system, and the at least two sealing assemblies are arranged along the axial direction of the rotating shaft system. In this way, two or more sealing structures can be formed on the same side of the lubricant cavity, the probability of lubricant flowing out of the lubricant cavity is reduced, and the sealing performance of the lubricant cavity is improved. The at least two sealing assemblies can prevent the lubricant in the lubricant cavity from flowing out along the axial direction of the rotating shaft system, so that the lubricant cannot infiltrate into the inner surface of the brake hub, the brake failure of the mechanical equipment is avoided, and the safety of the mechanical equipment is improved.

Description

Technical Field

[0001] This application relates to the field of mechanical transmission technology, specifically to a transmission structure and mechanical equipment. Background Technology

[0002] Forklifts are commonly used transportation machines in industrial production. The wheels of a forklift rotate under the drive of the half-shafts in a wheel-side drive structure, and can also stop rotating under the braking action of the brake drum in the wheel-side drive structure.

[0003] The existing wheel-side drive structure has an oil chamber. The lubricating oil in the oil chamber is used to lubricate the rolling bearings. An annular oil seal is installed on the outside of the oil chamber, between the axle housing and the wheel hub, to prevent the lubricating oil in the oil chamber from flowing out.

[0004] However, as forklifts age, oil leaks may occur. The leaked lubricating oil will seep into the inner surface of the brake drum, reducing the braking friction between the brake drum and brake pads during braking. This can lead to brake failure, thus lowering the forklift's safety. Utility Model Content

[0005] This application provides a transmission structure and mechanical device. The transmission structure includes a shaft system and a rotating system. The rotating system is fitted onto the shaft system to enclose and form a lubricant cavity. On the same side of the lubricant cavity, at least two sealing components are provided between the rotating system and the shaft system, and the at least two sealing components are arranged along the axial direction of the shaft system. In this way, two or more sealing structures can be formed on the same side of the lubricant cavity. As long as one of the sealing components performs its sealing function, lubricant can be prevented from flowing out of the lubricant cavity, thereby improving the sealing performance of the lubricant cavity.

[0006] To achieve the above objectives, this application adopts the following technical solution:

[0007] In a first aspect, this application provides a transmission structure, the transmission structure comprising: a rotating shaft system and a rotating system. The rotating system is sleeved on the rotating shaft system to enclose and form a lubricant cavity; on the same side of the lubricant cavity, at least two sealing components are provided between the rotating system and the rotating shaft system, and the at least two sealing components are arranged along the axial direction of the rotating shaft system.

[0008] As an optional implementation, the number of sealing components is two, namely an annular first sealing component and an annular second sealing component;

[0009] The first sealing assembly and the second sealing assembly abut against each other along the axial direction of the rotating shaft system.

[0010] As an optional implementation, both the first sealing assembly and the second sealing assembly are connected to the rotating system, and are both sleeved on the rotating shaft system and rotatably connected to the rotating shaft system.

[0011] As an optional implementation, the first sealing component is an elastic component, and a buffer groove is provided in the middle of the first sealing component along the radial direction of the rotating shaft system.

[0012] As an optional implementation, the portion of the first sealing assembly that contacts the rotating shaft system is a sealing part made of polytetrafluoroethylene;

[0013] The portion of the shaft system that contacts the first sealing component is coated with a zirconium oxide coating.

[0014] As an optional implementation, the second sealing assembly includes an annular pressure cap and an annular nesting assembly;

[0015] The outer ring surface of the annular pressure cap is connected to the rotating system, and the inner ring surface of the annular pressure cap is rotatably connected to the rotating shaft system;

[0016] The inner ring surface of the annular pressure cap is provided with an annular receiving groove, the annular nesting component is housed in the annular receiving groove, and the annular nesting component is sleeved on the rotating shaft system and rotatably connected to the rotating shaft system.

[0017] As an optional implementation, the annular nested assembly includes an annular seal and an elastic ring; the elastic ring is embedded in the annular seal and is coaxially arranged with the annular seal;

[0018] The elastic ring can spontaneously contract radially to allow the annular nested assembly to fit onto the rotating shaft system.

[0019] As an optional implementation, the second sealing assembly further includes an annular gasket;

[0020] The outer ring surface of the annular pressure cap is threaded to the end of the rotating system, so that a connecting seam is formed between the outer ring surface of the annular pressure cap and the rotating system, and the annular gasket covers the connecting seam.

[0021] As an optional implementation, the shaft system includes a bridge housing and a connecting shaft, and the rotation system includes a wheel hub and a brake hub, wherein the wheel hub and the brake hub are coaxially and fixedly connected.

[0022] The connecting shaft passes through the axle housing and is fixedly connected to the wheel hub at its extended end. Both the wheel hub and the brake hub are fitted onto the axle housing, and the wheel hub and the axle housing together form the lubricant cavity.

[0023] Secondly, this application provides a mechanical device, which includes the transmission structure described in any of the first aspects above.

[0024] Compared with the prior art, the beneficial effects of this application are at least as follows:

[0025] This transmission structure includes a shaft system and a rotating system. The rotating system is fitted onto the shaft system to form a lubricant cavity. This lubricant cavity contains a sufficient amount of lubricant, which lubricates the shaft system and the rotating system. This allows the rotating system to rotate more easily relative to the shaft system, thereby reducing energy loss in the mechanical equipment. It also reduces frictional loss between the shaft system and the rotating system, thus extending the service life of the transmission system.

[0026] Because at least two sealing components are provided between the rotating system and the shaft system on the same side of the lubricant cavity, two or more sealing structures can be formed on the same side of the lubricant cavity. As long as one of the sealing components performs its sealing function, it can prevent lubricant from flowing out of the lubricant cavity, thereby reducing the probability of lubricant flowing out of the lubricant cavity and improving the sealing performance of the lubricant cavity.

[0027] Because at least two sealing components are arranged along the axial direction of the shaft system, these at least two sealing components can prevent the lubricant in the lubricant cavity from flowing out along the axial direction of the shaft system. This also prevents the lubricant from wetting the inner surface of the brake drum, thus preventing a reduction in the braking friction between the brake drum and brake pads during braking, thereby preventing brake failure and improving the safety of the mechanical equipment. Attached Figure Description

[0028] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0029] Figure 1 This is a schematic diagram of a transmission structure provided in an embodiment of this application;

[0030] Figure 2 A schematic diagram of a transmission structure formed by cutting it with a plane through the axis of the rotating shaft system, according to an embodiment of this application;

[0031] Figure 3 A cross-sectional view of a transmission structure provided in this application after being cut by a plane passing through the axis of the rotating shaft system;

[0032] Figure 4 for Figure 3 A magnified view of a section at point D;

[0033] Figure 5 This is a schematic diagram of the structure of the second sealing component of a transmission structure provided in an embodiment of this application.

[0034] Figure 6 A cross-sectional view of a second sealing component of a transmission structure provided in this application embodiment, formed by cutting it with a plane passing through its own axis;

[0035] Figure 7 This is a schematic diagram of the annular nested component of the second sealing assembly of a transmission structure provided in an embodiment of this application.

[0036] Explanation of reference numerals in the attached figures:

[0037] 100 - Transmission structure, 110 - Shaft system, 111 - Zirconia coating, 112 - Axle housing, 113 - Connecting shaft, 120 - Rotation system, 121 - Hub, 122 - Brake hub, 130 - Lubricant cavity, 140 - Sealing assembly, 140a - First sealing assembly, 141 - Buffer groove, 142 - Sealing part, 140b - Second sealing assembly, 146 - Annular pressure cap, 1461 - Annular receiving groove, 147 - Annular nesting assembly, 1471 - Annular seal, 1472 - Elastic ring, 148 - Annular gasket, 150 - Rolling bearing, 160 - Gear ring. Detailed Implementation

[0038] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application. Unless otherwise specified, the following embodiments and features can be combined with each other.

[0039] Forklifts are commonly used transportation machines in industrial production. The wheels of a forklift rotate under the drive of the half-shafts in a wheel-side drive structure, and can also stop rotating under the braking action of the brake drum in the wheel-side drive structure.

[0040] The existing wheel-side drive structure includes a drive axle housing, a half-shaft, a wheel hub, and a brake hub, with the wheel hub and brake hub coaxially and fixedly connected. The half-shaft passes through the axle housing and is fixedly connected to the wheel hub at its extended end, so that both the wheel hub and brake hub are fitted onto the ends of the axle housing. The axle housing and wheel hub are rotatably connected via rolling bearings, and the axle housing, wheel hub, and rolling bearings together form an oil cavity. The lubricating oil in the oil cavity is used to lubricate the rolling bearings. An annular oil seal is provided between the axle housing and the wheel hub on the outside of the oil cavity to prevent the lubricating oil in the oil cavity from flowing out.

[0041] However, as the forklift ages, the wear on this annular oil seal increases significantly. When the seal wears down and develops a gap, oil leakage occurs. Furthermore, the lip of the oil seal is prone to axial and radial displacement relative to the half-shaft under vibration or impact conditions, which can lead to seal failure and further oil leakage. The leaked lubricating oil soaks into the inner surface of the brake drum, reducing the braking friction between the brake drum and brake pads during braking, potentially causing brake failure and thus lowering the forklift's safety.

[0042] To address the aforementioned technical problems, the transmission structure provided by this utility model solves these problems by providing at least two sealing components between the rotating system and the shaft system on the same side of the lubricant cavity. Specifically, the transmission structure includes a shaft system and a rotating system. The rotating system is fitted onto the shaft system to enclose and form the lubricant cavity. The lubricant cavity contains a sufficient amount of lubricant, which lubricates the shaft system and the rotating system, making it easier for the rotating system to rotate relative to the shaft system, thereby reducing energy loss in the mechanical equipment. It also reduces frictional loss between the shaft system and the rotating system, thus extending the service life of the transmission system.

[0043] Because at least two sealing components are provided between the rotating system and the shaft system on the same side of the lubricant cavity, two or more sealing structures can be formed on the same side of the lubricant cavity. As long as one of the sealing components performs its sealing function, it can prevent lubricant from flowing out of the lubricant cavity, thereby reducing the probability of lubricant flowing out of the lubricant cavity and improving the sealing performance of the lubricant cavity.

[0044] Because at least two sealing components are arranged along the axial direction of the shaft system, these at least two sealing components can prevent the lubricant in the lubricant cavity from flowing out along the axial direction of the shaft system. This also prevents the lubricant from wetting the inner surface of the brake drum, thus preventing a reduction in the braking friction between the brake drum and brake pads during braking, thereby preventing brake failure and improving the safety of the mechanical equipment.

[0045] The contents of this application will now be described in detail with reference to the accompanying drawings, so that those skilled in the art can have a clearer and more detailed understanding of the contents of this application.

[0046] The following provides a detailed description of the specific structure of the aforementioned transmission structure and various possible implementation methods.

[0047] Figure 1 This is a schematic diagram of a transmission structure 100 provided in an embodiment of this application. Figure 2 This is a schematic diagram of a transmission structure 100 provided in this application, formed by cutting it with a plane passing through the axis of the rotating shaft system 110. Figure 3 This is a cross-sectional view of a transmission structure 100 provided in this application embodiment, formed by cutting it with a plane passing through the axis of the rotating shaft system 110. Figure 4 for Figure 3 A magnified view of a section at point D.

[0048] See Figure 1 , Figure 2 , Figure 3 and Figure 4 The transmission structure 100 includes a shaft system 110 and a rotation system 120. The rotation system 120 is sleeved on the shaft system 110 to enclose and form a lubricant cavity 130. On the same side of the lubricant cavity 130, at least two sealing components 140 are provided between the rotation system 120 and the shaft system 110, and the at least two sealing components 140 are arranged along the axial direction of the shaft system 110.

[0049] In this embodiment, the transmission structure 100 includes a shaft system 110 and a rotating system 120. The rotating system 120 is fitted onto the shaft system 110 to form a lubricant cavity 130. The lubricant cavity 130 contains a sufficient amount of lubricant, which lubricates the shaft system 110 and the rotating system 120. This makes it easier for the rotating system 120 to rotate relative to the shaft system 110, thereby reducing energy loss in the mechanical equipment. It also reduces frictional loss between the shaft system 110 and the rotating system 120, thus extending the service life of the transmission system.

[0050] Because at least two sealing components 140 are provided between the rotating system 120 and the rotating shaft system 110 on the same side of the lubricant cavity 130, two or more sealing structures can be formed on the same side of the lubricant cavity 130. As long as one of the sealing components 140 performs its sealing function, it can prevent lubricant from flowing out of the lubricant cavity 130, thereby reducing the probability of lubricant flowing out of the lubricant cavity 130 and improving the sealing performance of the lubricant cavity 130.

[0051] Because at least two sealing components 140 are arranged along the axial direction of the shaft system 110, these at least two sealing components 140 can prevent the lubricant in the lubricant cavity 130 from flowing out along the axial direction of the shaft system 110. This also prevents the lubricant from wetting the inner surface of the brake drum 122, thus preventing a decrease in the braking friction between the brake drum 122 and the brake pads during braking, thereby preventing brake failure and improving the safety of the mechanical equipment.

[0052] It should be noted that the lubricant in the lubricant cavity 130 can be machine oil or grease, or other types of lubricants. This application embodiment does not limit this.

[0053] It should also be noted that the number of the aforementioned sealing components 140 can be two, three or more, and this application embodiment does not limit this.

[0054] As an optional implementation, in some embodiments, see [link to relevant documentation]. Figure 1 , Figure 2 , Figure 3 and Figure 4 There are two sealing components 140, namely an annular first sealing component 140a and an annular second sealing component 140b. The first sealing component 140a and the second sealing component 140b abut against each other along the axial direction of the rotating shaft system 110.

[0055] In this embodiment, since there are two sealing components 140, namely an annular first sealing component 140a and an annular second sealing component 140b, it is possible to ensure the sealing performance of the lubricant cavity 130 by using a minimum number of sealing components 140, based on the premise that at least two sealing components 140 are provided between the rotating system 120 and the rotating shaft system 110 on the same side of the lubricant cavity 130, thereby reducing the production cost of the transmission structure 100.

[0056] Because the first sealing assembly 140a and the second sealing assembly 140b abut against each other along the axial direction of the rotating shaft system 110, there is both compressive and frictional force between them. The compressive force prevents the first sealing assembly 140a from displacing axially along the rotating shaft system 110, and the frictional force prevents it from displacing radially along the rotating shaft system 110. This makes the position of the first sealing assembly 140a more stable, preventing lubricant in the lubricant cavity 130 from flowing out of the gap between the first sealing assembly 140a and the rotating shaft system 110. This further improves the sealing performance of the lubricant cavity 130.

[0057] As an optional implementation, in some embodiments, see [link to relevant documentation]. Figure 1 , Figure 2 , Figure 3 and Figure 4 Both the first sealing assembly 140a and the second sealing assembly 140b are connected to the rotating system 120, and are both sleeved on the rotating shaft system 110 and rotatably connected to the rotating shaft system 110.

[0058] In this way, the first sealing component 140a and the second sealing component 140b can ensure the sealing performance of the lubricant cavity 130, while allowing themselves and the rotating system 120 to rotate freely relative to the rotating shaft system 110, thereby realizing the transmission function of the transmission structure 100.

[0059] As an optional implementation, in some embodiments, see [link to relevant documentation]. Figure 1 , Figure 2 , Figure 3 and Figure 4 The first sealing component 140a is an elastic component, and a buffer groove 141 is provided in the middle of the first sealing component 140a along the radial direction of the rotating shaft system 110.

[0060] In this embodiment, the first sealing component 140a is an elastic component. Thus, when the rotation system 120 and the shaft system 110 undergo relative displacement, the first sealing component 140a can elastically deform to adjust its size to adapt to the gap between the rotation system 120 and the shaft system 110, thereby always sealing the lubricant cavity 130.

[0061] In the transmission structure 100, the rotational shaft system 110 has a large displacement relative to the rotational system 120 along the radial direction, which also generates vibration. To accommodate this characteristic, a buffer groove 141 is provided in the middle of the first sealing assembly 140a along the radial direction of the rotational shaft system 110. That is, the first sealing assembly 140a has a hollow structure. This makes the first sealing structure more deformable along the radial direction of the rotational shaft system 110, thereby further improving the sealing performance of the lubricant cavity 130.

[0062] As an optional implementation, in some embodiments, see [link to relevant documentation]. Figure 1 , Figure 2 , Figure 3 and Figure 4 The portion of the first sealing assembly 140a that contacts the shaft system 110 is a sealing part 142 made of polytetrafluoroethylene. The portion of the shaft system 110 that contacts the first sealing assembly 140a is provided with a zirconium oxide coating 111.

[0063] Because polytetrafluoroethylene (PTFE) has good wear resistance, the part of the first sealing assembly 140a that contacts the shaft system 110 is made of PTFE sealing portion 142, which can improve the wear resistance of the first sealing assembly 140a.

[0064] Because the surface of the zirconia coating 111 is relatively smooth, applying the zirconia coating 111 to the portion of the shaft system 110 that contacts the first sealing component 140a reduces the frictional force generated when the shaft system 110 rotates relative to the first sealing component 140a. This makes it easier for the first sealing component 140a to rotate relative to the shaft system 110, thereby reducing energy loss in the mechanical equipment. Simultaneously, it also reduces frictional loss between the shaft system 110 and the first sealing component 140a, thus extending the service life of the transmission system.

[0065] As an optional implementation, in some embodiments, see [link to relevant documentation]. Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 and Figure 6 The second sealing assembly 140b includes an annular pressure cap 146 and an annular nesting assembly 147. The outer annular surface of the annular pressure cap 146 is connected to the rotation system 120, and the inner annular surface of the annular pressure cap 146 is rotatably connected to the rotating shaft system 110. The inner annular surface of the annular pressure cap 146 is provided with an annular receiving groove 1461, the annular nesting assembly 147 is accommodated in the annular receiving groove 1461, and the annular nesting assembly 147 is sleeved on the rotating shaft system 110 and rotatably connected to the rotating shaft system 110.

[0066] In this embodiment, since the outer ring surface of the annular pressure cap 146 is connected to the rotation system 120, the second sealing assembly 140b is connected to the rotation system 120 through the outer ring surface of the annular pressure cap 146.

[0067] The inner annular surface of the annular cap 146 is rotatably connected to the rotating shaft system 110. The inner annular surface of the annular cap 146 has an annular receiving groove 1461, and the annular nesting assembly 147 is housed within the annular receiving groove 1461. The annular nesting assembly 147 is sleeved on the rotating shaft system 110 and rotatably connected to it. Thus, the inner annular surface of the annular cap 146 can limit the movement of the annular nesting assembly 147, preventing it from displacing axially or radially along the rotating shaft system 110. This improves the structural stability of the second sealing assembly 140b.

[0068] As an optional implementation, in some embodiments, see [link to relevant documentation]. Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 , Figure 6 and Figure 7 The annular nesting assembly 147 includes an annular seal 1471 and an elastic ring 1472; the elastic ring 1472 is embedded in the annular seal 1471 and is coaxially arranged with the annular seal 1471. The elastic ring 1472 is capable of spontaneously contracting radially so that the annular nesting assembly 147 is fitted onto the rotating shaft system 110.

[0069] In this embodiment, the elastic ring 1472 can spontaneously contract radially. This allows the annular nested assembly 147 to be kept taut, ensuring that the inner ring surface of the annular nested assembly 147 fits tightly against the rotating shaft system 110. This prevents gaps between the annular nested assembly 147 and the rotating shaft system 110, thereby further improving the sealing performance of the annular nested assembly 147.

[0070] It should be noted that the above-mentioned elastic ring 1472 can be a rubber ring or a silicone ring, or an elastic ring 1472 made of other materials. This application embodiment does not limit this.

[0071] As an optional implementation, in some embodiments, see [link to relevant documentation]. Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 , Figure 6 and Figure 7 The second sealing assembly 140b also includes an annular gasket 148. The outer annular face of the annular cap 146 is threaded to the end of the rotating system 120 so that a connection seam is formed between the outer annular face of the annular cap 146 and the rotating system 120, and the annular gasket 148 covers the connection seam.

[0072] In this embodiment, the outer ring surface of the annular pressure cap 146 is threaded to the end of the rotating system 120. This threaded connection prevents the annular pressure cap 146 from moving axially along the rotating shaft system 110, and consequently prevents the second sealing assembly 140b from moving axially along the rotating shaft system 110, thus allowing the second sealing assembly 140b to be more securely connected to the rotating system 120.

[0073] Because the second sealing assembly 140b includes an annular gasket 148, a connection seam is formed between the outer annular cap 146 and the rotating system 120, and the annular gasket 148 covers the connection seam. In this way, the annular gasket 148 can completely seal the connection seam, preventing lubricant in the lubricant cavity 130 from flowing out through the connection seam. This further improves the sealing performance of the second sealing assembly 140b.

[0074] As an optional implementation, in some embodiments, see [link to relevant documentation]. Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 , Figure 6 and Figure 7 The rotating shaft system 110 includes an axle housing 112 and a connecting shaft 113, and the rotating system 120 includes a wheel hub 121 and a brake hub 122, which are coaxially and fixedly connected. The connecting shaft 113 passes through the axle housing 112 and is fixedly connected to the wheel hub 121 at its extended end. Both the wheel hub 121 and the brake hub 122 are fitted onto the axle housing 112, and the wheel hub 121 and the axle housing 112 enclose a lubricant cavity 130.

[0075] In this embodiment, the connecting shaft 113 passes through the axle housing 112 and is fixedly connected to the wheel hub 121 at its extended end. Thus, when the shaft rotates, it can drive the wheel hub 121 to rotate, thereby driving the wheel to rotate and thus providing a driving effect for the mechanical equipment.

[0076] The rotation system 120 includes a wheel hub 121 and a brake hub 122, which are coaxially and fixedly connected. Both the wheel hub 121 and the brake hub 122 are fitted onto the axle housing 112. The brake hub 122 can cooperate with the brake shoes to prevent the brake hub 122 from rotating, thereby preventing the wheel hub 121 from rotating, thus achieving the braking effect. The aforementioned first sealing component 140a and second sealing component 140b can prevent the lubricant in the lubricant cavity 130 from flowing out, thereby preventing the outflowing lubricant from wetting the brake hub 122 and the brake shoes, thus preventing brake failure.

[0077] The transmission structure 100 also includes two rolling bearings 150, which are disposed between the axle housing 112 and the hub 121 to reduce friction between the axle housing 112 and the hub 121 caused by rotation. Along the axial direction of the connecting shaft 113, the two rolling bearings 150 are disposed at both ends of the lubricant cavity 130. The transmission structure 100 also includes a gear ring 160, which is fixedly connected to the axle housing 112.

[0078] See Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 , Figure 6 and Figure 7 This application also provides a mechanical device, which includes any of the above-described transmission structures 100.

[0079] In this embodiment, the transmission structure 100 includes a shaft system 110 and a rotating system 120. The rotating system 120 is fitted onto the shaft system 110 to form a lubricant cavity 130. The lubricant cavity 130 contains a sufficient amount of lubricant, which lubricates the shaft system 110 and the rotating system 120. This allows the rotating system 120 to rotate more easily relative to the shaft system 110, thereby reducing energy loss in the mechanical equipment. It also reduces frictional loss between the shaft system 110 and the rotating system 120, thus extending the service life of the transmission system and consequently, the service life of the mechanical equipment.

[0080] Because at least two sealing components 140 are provided between the rotating system 120 and the shaft system 110 on the same side of the lubricant cavity 130, two or more sealing structures can be formed on the same side of the lubricant cavity 130. As long as one of the sealing components 140 functions, lubricant can be prevented from flowing out of the lubricant cavity 130, thus reducing the probability of lubricant leakage and improving the sealing performance of the lubricant cavity 130. This also reduces the frequency of adding lubricant to the lubricant cavity 130, thereby reducing the maintenance costs of the mechanical equipment.

[0081] Because at least two sealing components 140 are arranged along the axial direction of the shaft system 110, these at least two sealing components 140 can prevent the lubricant in the lubricant cavity 130 from flowing out along the axial direction of the shaft system 110. This also prevents the lubricant from wetting the inner surface of the brake drum 122, thus preventing a decrease in the braking friction between the brake drum 122 and the brake pads during braking, thereby preventing brake failure and improving the safety of the mechanical equipment.

[0082] It should be noted that the aforementioned mechanical equipment can be a forklift, or other types of construction machinery or vehicles, and this application embodiment does not limit this.

[0083] It should be noted that the terms "one embodiment," "embodiment," "exemplary embodiment," "some embodiments," etc., mentioned in the specification indicate that the described embodiment may include a specific feature, structure, or characteristic, but not every embodiment necessarily includes that specific feature, structure, or characteristic. Furthermore, such phrases do not necessarily refer to the same embodiment. Moreover, when a specific feature, structure, or characteristic is described in connection with an embodiment, implementing such a feature, structure, or characteristic in conjunction with other embodiments, whether explicitly described or not, is within the knowledge scope of those skilled in the art.

[0084] Generally speaking, terms should be understood at least in part by their use in context. For example, at least in part by context, the term "one or more" as used in the text can be used to describe any feature, structure, or characteristic of the singular meaning, or a combination of features, structures, or characteristics of the plural meaning. Similarly, at least in part by context, terms such as "a" or "the" can also be understood to convey either singular or plural usage.

[0085] It should be readily understood that the terms “on,” “above,” and “on top of” in this application should be interpreted in the broadest possible sense, such that “on” means not only “directly on something,” but also “on something” with an intermediate feature or layer therebetween, and that “above” or “on top of” means not only “above something” or “on top of something,” but also “on something” or “on top of something” without an intermediate feature or layer therebetween, i.e., directly on something.

[0086] Furthermore, for ease of explanation, spatially relative terms such as "below," "below," "under," "above," and "above" may be used to describe the relationship of one element or feature relative to other elements or features as shown in the figures. Spatially relative terms are intended to encompass different orientations of the device in use or operation other than those shown in the figures. The device may have other orientations rotated 90° or be in other orientations, and the spatially relative descriptive terms used herein may be interpreted accordingly.

[0087] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this application, and are not intended to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this application.

Claims

1. A transmission structure, characterized by, include: Shaft system; A rotating system is fitted onto the rotating shaft system to enclose and form a lubricant cavity; on the same side of the lubricant cavity, at least two sealing components are provided between the rotating system and the rotating shaft system, and the at least two sealing components are arranged along the axial direction of the rotating shaft system.

2. The transmission structure according to claim 1, characterized in that, The number of sealing components is two, namely an annular first sealing component and an annular second sealing component; The first sealing assembly and the second sealing assembly abut against each other along the axial direction of the rotating shaft system.

3. The transmission structure according to claim 2, characterized in that, Both the first sealing assembly and the second sealing assembly are connected to the rotating system, and are both sleeved on the rotating shaft system and rotatably connected to the rotating shaft system.

4. The transmission structure according to claim 2, characterized in that, The first sealing component is an elastic component, and a buffer groove is provided in the middle of the first sealing component along the radial direction of the rotating shaft system.

5. The transmission structure according to claim 2, characterized in that, The portion of the first sealing assembly that contacts the rotating shaft system is a sealing part made of polytetrafluoroethylene; The portion of the shaft system that contacts the first sealing component is coated with a zirconium oxide coating.

6. The transmission structure according to claim 2, characterized in that, The second sealing assembly includes an annular pressure cap and an annular nesting assembly; The outer ring surface of the annular pressure cap is connected to the rotating system, and the inner ring surface of the annular pressure cap is rotatably connected to the rotating shaft system; The inner ring surface of the annular pressure cap is provided with an annular receiving groove, the annular nesting component is housed in the annular receiving groove, and the annular nesting component is sleeved on the rotating shaft system and rotatably connected to the rotating shaft system.

7. The transmission structure according to claim 6, characterized in that, The annular nested assembly includes an annular seal and an elastic ring; the elastic ring is embedded in the annular seal and is coaxially arranged with the annular seal; The elastic ring can spontaneously contract radially to allow the annular nested assembly to fit onto the rotating shaft system.

8. The transmission structure according to claim 6, characterized in that, The second sealing assembly also includes an annular gasket; The outer ring surface of the annular pressure cap is threaded to the end of the rotating system, so that a connecting seam is formed between the outer ring surface of the annular pressure cap and the rotating system, and the annular gasket covers the connecting seam.

9. The transmission structure according to any one of claims 1-8, characterized in that, The shaft system includes a bridge housing and a connecting shaft, and the rotation system includes a wheel hub and a brake hub, wherein the wheel hub and the brake hub are coaxially and fixedly connected. The connecting shaft passes through the axle housing and is fixedly connected to the wheel hub at its extended end. Both the wheel hub and the brake hub are fitted onto the axle housing, and the wheel hub and the axle housing together form the lubricant cavity.

10. A mechanical device, characterized in that, Includes the transmission structure described in any one of claims 1-9.

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