Sealing cantilever tensioning wheel and high-altitude transmission structure
By introducing a sealing ring and sealing plate into the cantilever tensioner, the problems of wear and insufficient sealing of the limiting mechanism are solved, resulting in a longer service life and higher stability, making it suitable for high-altitude working environments.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-02-17
- Publication Date
- 2026-03-06
AI Technical Summary
Traditional tensioner limit mechanisms have poor wear resistance, which leads to a decrease in limit accuracy and affects the track tension. In addition, cantilever tensioners lack an effective sealing structure, making them susceptible to corrosion from moisture and impurities, thus shortening their service life.
A sealed cantilever tensioning wheel was designed, which uses a sealing ring and sealing plate to cooperate with the bushing to form a highly sealed structure. Combined with the cantilever structure, it enhances stability and protection capabilities and prevents contaminants from entering.
It improves the service life and stability of the tensioner, reduces maintenance costs, expands the scope of application, and shows better adaptability and durability, especially in high-altitude working environments.
Smart Images
Figure CN223972634U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of tensioning wheel technology, specifically to a sealed cantilever tensioning wheel and a high-altitude transmission structure. Background Technology
[0002] Traditional tracked chassis tensioners have been widely used in modern engineering construction and production scenarios due to their good stability and strong traction. However, in actual application, traditional tracked chassis tensioners face many problems that urgently need to be solved.
[0003] In the tensioning structure of a tracked chassis, the limiting mechanism that restricts the axial movement of the wheel assembly is a crucial component for ensuring the normal operation of the tensioning wheel. However, the materials used in existing limiting mechanisms often lack wear resistance. During prolonged high-intensity operation of the equipment, the limiting mechanism is easily subjected to frequent friction and impact, leading to rapid material wear. This not only significantly reduces the limiting accuracy of the limiting mechanism, making it difficult to effectively restrain the axial movement of the wheel assembly and thus affecting the track tension, resulting in serious malfunctions such as track loosening, deviation, or even derailment, but also the frequent replacement of worn limiting mechanism components greatly increases equipment maintenance costs and downtime, reducing production efficiency.
[0004] To address the aforementioned problems of traditional tensioners, the industry has begun experimenting with cantilevered tensioners, particularly in aerial work platforms. The unique structure of the cantilevered tensioner optimizes its performance to some extent, providing better adaptability for aerial work. However, new problems have arisen. Because cantilevered tensioners typically lack effective sealing structures, in high-altitude working environments, especially in humid and dusty conditions, moisture, mud, and other impurities can easily penetrate the tensioner's rotating shaft. Once inside, these impurities react chemically with the internal structural components, causing corrosion. Over time, the corrosion intensifies, severely damaging the shaft's precision and strength, significantly shortening the tensioner's lifespan, increasing maintenance costs and safety hazards, and severely restricting the widespread application of cantilevered tensioners in aerial work. Summary of the Invention
[0005] Therefore, the technical problem to be solved by this utility model is to overcome the problem of limited service life of tensioning wheels in the prior art, and to provide a sealed cantilever tensioning wheel and a high-altitude transmission structure.
[0006] To solve the above-mentioned technical problems, this utility model provides a sealed cantilever tensioning wheel, comprising: a wheel body; a wheel and axle assembly, the wheel and axle assembly including an assembly cylinder, a shaft, a connecting baffle, and a sealing mechanism. The assembly cylinder is inserted through the center of the wheel body, and at least a portion of the shaft is inserted into the assembly cylinder. The connecting baffle is located inside the assembly cylinder and connected to the end of the shaft. The sealing mechanism includes a sealing ring and a sealing plate. The sealing ring is sleeved on the shaft and located between the shaft and the inner wall of the assembly cylinder. It has a sealing groove and multiple oil storage grooves. The sealing groove is recessed inward from the outer periphery of the sealing ring body, and a sealing ring is provided inside the sealing groove. The sealing ring is interference-fitted with the inside of the assembly cylinder. The oil storage grooves are arranged on the surface of the sealing ring body and all extend along the axial direction of the shaft. Any oil storage groove is filled with sealing oil. The sealing plate is disposed between the connecting baffle and the end of the shaft to seal the openings at both ends of the assembly cylinder with the sealing ring.
[0007] In one embodiment of the present invention, the wheel and axle assembly further includes a bushing, the bushing being disposed inside the assembly cylinder, the sealing sheet and the sealing ring being disposed at both ends of the bushing in the axial direction, and at least a portion of the shaft passing through the bushing.
[0008] In one embodiment of the present invention, the shaft includes a fixedly connected abutment portion and a through-connection portion, wherein the diameter of the through-connection portion is smaller than the diameter of the abutment portion, and the through-connection portion passes through the inside of the bushing, and the abutment portion abuts against the bushing.
[0009] In one embodiment of this utility model, the surface of the through-connection portion is provided with a lubricating layer.
[0010] In one embodiment of this utility model, the shaft end, the sealing plate, and the connecting baffle are all detachably connected by at least one connector.
[0011] In one embodiment of the present invention, the wheel axle assembly further includes an end cap, which is disposed at one end of the assembly cylinder near the connecting baffle and is detachably connected to the assembly cylinder to cover the assembly cylinder.
[0012] In one embodiment of the present invention, the sealing mechanism further includes a sealing gasket, which is disposed between the end cap and the assembly cylinder, and the diameter of the sealing gasket is larger than the diameter of the assembly cylinder.
[0013] In one embodiment of the present invention, the wheel and axle assembly further includes a fixing plate, which is disposed at one end of the shaft body, and the shaft body is disposed perpendicular to the surface of the fixing plate.
[0014] In one embodiment of the present invention, a plurality of oil storage grooves are disposed on the edge of the sealing ring, and the plurality of oil storage grooves are evenly spaced apart.
[0015] This utility model also provides a high-altitude transmission structure, which includes the aforementioned sealed cantilever tensioning wheel.
[0016] The above-mentioned technical solution of this utility model has the following advantages compared with the prior art:
[0017] The sealed cantilever tensioning wheel and high-altitude transmission structure described in this utility model achieves a high degree of sealing of the wheel axle through a sealing mechanism in the wheel axle assembly. The sealing ring and sealing plate cooperate with the bushing to effectively block external environmental pollutants, thereby extending the service life of the tensioning wheel. Furthermore, the cantilever structure in this application also improves the stability of the tensioning wheel during operation. Compared to traditional tracked chassis tensioning wheels and other structures, this application offers advantages such as long service life, high stability, flexible operation, and wide applicability. Attached Figure Description
[0018] To make the content of this utility model easier to understand, the present utility model will be further described in detail below with reference to specific embodiments and accompanying drawings.
[0019] Figure 1 This is an exploded view of the structure of the sealing cantilever tensioning wheel in a preferred embodiment of this utility model;
[0020] Figure 2 yes Figure 1 The diagram shows a three-dimensional structure of the sealing ring in the tensioning wheel of the sealing cantilever.
[0021] Explanation of reference numerals in the accompanying drawings: 100, wheel body; 200, wheel and axle assembly; 210, fixing plate; 220, axle body; 221, abutment part; 222, through-connection part; 230, bushing; 240, connecting baffle; 250, sealing mechanism; 251, sealing ring; 2511, sealing groove; 2512, oil reservoir; 252, sealing plate; 253, sealing gasket; 260, end cap; 270, assembly cylinder; 280, connecting piece; 290, sealing ring. Detailed Implementation
[0022] The present invention will be further described below with reference to the accompanying drawings and specific embodiments, so that those skilled in the art can better understand and implement the present invention. However, the embodiments are not intended to limit the present invention. Example 1
[0023] This embodiment provides a sealed cantilever tensioning wheel, comprising: a wheel body 100; and a wheel axle assembly 200. The wheel axle assembly 200 includes an assembly cylinder 270, a shaft 220, a connecting baffle 240, and a sealing mechanism 250. The assembly cylinder 270 is disposed at the center of the wheel body 100, and at least a portion of the shaft 220 is disposed within the assembly cylinder 270. The connecting baffle 240 is located inside the assembly cylinder 270 and connected to the end of the shaft 220. The sealing mechanism 250 includes a sealing ring 251 and a sealing plate 252. The sealing ring 251 is sleeved on the shaft 220 and is located between the shaft 220 and the assembly cylinder. Between the inner walls of the assembly cylinder 270, there are sealing grooves 2511 and multiple oil storage grooves 2512. The sealing grooves 2511 are recessed inward from the outer periphery of the sealing ring 251 body, and a sealing ring 290 is provided inside the sealing grooves 2511. The sealing ring 290 is interference-fitted with the interior of the assembly cylinder 270. The oil storage grooves 2512 are arranged on the surface of the sealing ring 251 body and all extend along the axial direction of the shaft 220. Any oil storage groove 2512 is filled with sealing oil. The sealing plate 252 is disposed between the connecting baffle 240 and the end of the shaft 220 to seal the openings at both ends of the assembly cylinder 270 with the sealing ring 251.
[0024] The sealed cantilever tensioner described in this embodiment achieves a high degree of sealing of the axle through the sealing mechanism 250 in the axle assembly 200. The sealing ring 251 and sealing plate 252 cooperate with the bushing 230 to effectively block external environmental pollutants, thereby extending the service life of the tensioner. Furthermore, the cantilever structure in this application also improves the stability of the tensioner during operation. Compared to traditional tracked chassis tensioners, this application offers advantages such as long service life, high stability, flexible operation, and wide applicability.
[0025] See Figure 1As shown, in this embodiment, the wheel 100 directly contacts the track, adjusting the track tension through its own rotation to ensure stable track operation on the chassis, preventing track slackness, deviation, and other problems, thus ensuring the normal operation of the equipment. The wheel axle assembly 200 serves as a support component for the tension wheel assembly, transmitting power and driving the tension wheel 100 to rotate. It also withstands various forces and torques generated during the operation of the tension wheel assembly. Specifically, the wheel axle assembly 200 in this embodiment further includes a fixing plate 210, which is disposed at one end of the axle 220. The axle 220 is perpendicular to the surface of the fixing plate 210, achieving a cantilever structure for the wheel 100. This cantilever structure possesses a certain degree of elasticity and flexibility, allowing for better absorption and buffering of external impacts and vibrations during track operation. Simultaneously, it effectively protects the track and other chassis components, reducing wear and damage, and extending the equipment's service life.
[0026] It should be noted that during routine operations, contaminants such as mud, sand, and moisture can easily enter the assembly cylinder 270, causing additional friction or corrosion damage to the shaft 220 and affecting its service life. Therefore, this application specifically improves the structure in this regard. Specifically, in this embodiment, the wheel axle assembly 200 further includes a bushing 230, which is disposed inside the assembly cylinder 270. The sealing plate 252 and the sealing ring 251 are respectively disposed at both ends of the bushing 230 in the axial direction, and at least a portion of the shaft 220 passes through the bushing 230. Further, the shaft 220 includes a fixedly connected abutment portion 221 and a through-connection portion 222, the diameter of which is smaller than the diameter of the abutment portion 221. The bushing 230 provides an installation position for the wheel 100 and reduces direct friction between the wheel 100 and the wheel axle assembly 200, thereby protecting the wheel axle assembly 200. In this embodiment, the through-connecting portion 222 passes through the inside of the bushing 230, the abutting portion 221 abuts against the bushing 230, and the end of the shaft 220, the sealing plate 252, and the connecting baffle 240 are all detachably connected by at least one bolt or other connecting member 280. Based on the above structure, the abutting portion 221 in this application can abut against and support the bushing 230 in the axial direction of the shaft 220, thereby improving the axial strength and stability of the shaft 220. Specifically, in this embodiment, in order to further reduce friction loss, the surface of the through-connecting portion 222 is coated with lubricating oil; other embodiments may provide other lubrication layers according to actual needs.
[0027] Further, see Figure 2As shown, in this embodiment, the sealing ring 251 serves two purposes: firstly, it axially positions the wheel body 100 and the shaft 220, thereby ensuring the stability of the tension wheel shaft during operation; secondly, its cooperation with the sealing ring 290 enhances the sealing performance between the wheel body 100 and the shaft 220, preventing impurities from entering the internal structure of the tension wheel. Furthermore, grease is added to its oil reservoir 2512, thereby providing lubrication for the contact points between the tension wheel shaft and other components. In this embodiment, multiple oil reservoirs 2512 are disposed on the edge of the sealing ring 251, and the multiple oil reservoirs 2512 are evenly spaced apart.
[0028] In this embodiment, the sealing plate 252 and the connecting baffle 240 can axially limit the tensioning wheel assembly, preventing axial movement of the tensioning wheel assembly during operation. Even under large axial forces, it can maintain the integrity of its structure, thereby effectively limiting the axial displacement of the shaft 220 and ensuring the normal operation of the tensioning wheel. Furthermore, in this embodiment, the sealing ring 251 and the base material of the sealing plate 252 are preferably copper components.
[0029] See Figure 1 As shown, the wheel and axle assembly 200 also includes an end cap 260, which cooperates with the sealing gasket 253 to seal the tensioning wheel assembly, preventing impurities such as moisture and mud from entering the tensioning wheel, thereby forming another internal structure to improve the service life of the tensioning wheel. The end cap 260 is disposed at one end of the assembly cylinder 270 near the connecting baffle 240, and is detachably connected to the assembly cylinder 270 to cover the assembly cylinder 270. Specifically, the sealing mechanism 250 also includes a sealing gasket 253, which is disposed between the end cap 260 and the assembly cylinder 270, and the diameter of the sealing gasket 253 is larger than the diameter of the assembly cylinder 270 to ensure its sealing effect. In this embodiment, the sealing gasket 253 is preferably a rubber gasket. In different embodiments, it can be configured with other materials or sizes, and this utility model does not impose specific limitations on this. Example 2
[0030] This embodiment provides a high-altitude transmission structure, which includes the sealed cantilever tensioning wheel described in Embodiment 1.
[0031] In summary, the sealed cantilever tensioning wheel and high-altitude transmission structure described in this utility model achieves a high degree of sealing of the wheel axle through the sealing mechanism 250 in the wheel axle assembly 200. The sealing ring 251 and sealing plate 252 cooperate with the bushing 230 to effectively block external environmental pollutants, thereby extending the service life of the tensioning wheel. Furthermore, the cantilever structure in this application also improves the stability of the tensioning wheel during operation. Compared to traditional tracked chassis tensioning wheels and other structures, this application offers advantages such as long service life, high stability, flexible operation, and wide applicability.
[0032] Obviously, the above embodiments are merely illustrative examples for clear explanation and are not intended to limit the implementation. Those skilled in the art will recognize that other variations or modifications can be made based on the above description. It is neither necessary nor possible to exhaustively list all possible implementations here. However, obvious variations or modifications derived therefrom are still within the protection scope of this invention.
Claims
1. A sealed cantilevered idler wheel, characterized by: The application relates to a sealed cantilever tensioning wheel. The sealed cantilever tensioning wheel comprises a wheel body, a wheel shaft assembly, a bearing assembly and a sealing mechanism, wherein the wheel shaft assembly comprises an assembling cylinder, a shaft body, a connecting baffle and the sealing mechanism; the assembling cylinder is arranged in the center of the wheel body; at least part of the shaft body is arranged in the assembling cylinder; the connecting baffle is arranged in the assembling cylinder and connected with the end of the shaft body; the sealing mechanism comprises a sealing ring and a sealing sheet; the sealing ring is arranged on the shaft body and between the shaft body and the inner wall of the assembling cylinder; the sealing ring is provided with a sealing groove and a plurality of oil storage grooves; the sealing groove is recessed inward from the periphery of the sealing ring body; the sealing groove is provided with a sealing ring; the sealing ring is in interference fit with the inner part of the assembling cylinder; the oil storage grooves are arranged on the surface of the sealing ring body and extend along the axial direction of the shaft body; any oil storage groove is filled with sealing oil; the sealing sheet is arranged between the connecting baffle and the end of the shaft body to seal the two ends of the assembling cylinder with the sealing ring. The wheel shaft assembly further comprises a shaft sleeve arranged in the assembling cylinder; the sealing sheet and the sealing ring are arranged at the two ends of the shaft sleeve in the axial direction; at least part of the shaft body is arranged in the shaft sleeve.
2. The sealed cantilevered idler wheel of claim 1, wherein: The shaft body comprises a fixedly-connected abutting part and a penetrating connecting part; the diameter of the penetrating connecting part is smaller than that of the abutting part; the penetrating connecting part is arranged in the shaft sleeve; and the abutting part abuts against the shaft sleeve.
3. The sealed cantilevered idler wheel of claim 2, wherein: The surface of the penetrating connecting part is provided with a lubricating layer.
4. The sealed cantilevered idler wheel of claim 3, wherein: The end of the shaft body, the sealing sheet and the connecting baffle are detachably connected through at least one connecting piece.
5. The sealed cantilevered idler wheel of claim 1, wherein: The wheel shaft assembly further comprises an end cover arranged at one end of the assembling cylinder close to the connecting baffle; the end cover is detachably connected with the assembling cylinder to cover the assembling cylinder.
6. The sealed cantilevered idler wheel of claim 1, wherein: The sealing mechanism further comprises a sealing gasket arranged between the end cover and the assembling cylinder; the diameter of the sealing gasket is larger than the caliber of the assembling cylinder.
7. The sealed cantilevered idler wheel of claim 6, wherein: The wheel shaft assembly further comprises a fixing plate arranged at one end of the shaft body; the shaft body is arranged perpendicularly to the surface of the fixing plate.
8. The sealed cantilevered idler wheel of claim 1, wherein: The plurality of oil storage grooves are arranged at the edge of the sealing ring and uniformly spaced.
9. The sealed cantilevered idler wheel of claim 1, wherein: The sealed cantilever tensioning wheel comprises the sealing mechanism according to any one of claims 1-9.
10. An aerial delivery structure, characterized by: