High-rotating-speed wheel edge assembly
By introducing a multi-stage planetary gear transmission system and an automatic centering and lubrication system into the wheel-side assembly, the axial force problem caused by errors was solved, and the reliability and stability of the wheel-side assembly at high speeds were improved.
Patent Information
- Application Number
- CN202520384454.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-03-06
- Publication Date
- 2025-11-25
- Estimated Expiration
- 2035-03-06
AI Technical Summary
Traditional wheel-side assemblies, under high-speed operating conditions, may experience misalignment between the articulated half-shaft and the planetary gear set due to machining and assembly errors in parts. This generates axial force, causing the wear-resistant pads to wear or burn out, affecting the overall vehicle's operational stability and reliability.
It adopts a multi-stage planetary gear transmission system, an automatic centering device, and an automatic lubrication system. The thrust bearing and the transmission shaft are in clearance fit. The automatic centering device absorbs axial force through the thrust bearing, and the automatic lubrication system improves the distribution of lubricating oil and eliminates speed difference and heat accumulation.
This improves the reliability and operational stability of the wheel-side assembly, prevents wear and burn-out of the wear-resistant pads, and ensures smooth operation of the drive axle.
Smart Images
Figure CN223594919U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to engineering machinery technical field, concretely is a high rotational speed wheel edge assembly. BACKGROUND
[0002] The crane is a high-end product of engineering machinery, has the advantages of high-speed running and high off-road performance, and is widely used in wind power, oil field, petrochemical and other major project fields. The drive axle is the end of the transmission system of the whole crane, used for reducing the power transmitted by the engine and increasing the torque, and the wheel edge reducer is part of the whole drive axle assembly. In the case of severe service conditions of the whole vehicle, it often runs in the road conditions of bumping and transfer, especially in the highway working condition, which puts higher requirements on the reliability of the wheel edge assembly, so that the wheel edge assembly must have high performance, high rotational speed and high reliability. The traditional wheel edge structure adopts a primary speed ratio, the whole wheel edge has low weight and simple structure, but for high-tonnage cranes with huge lifting capacity, especially in high-speed working conditions, in order to better load and improve the driving performance of the whole vehicle, the whole wheel edge adopts two-stage transmission, and an oil wear pad is arranged between the spline end of the articulated transmission shaft and the second sun gear. However, during the wheel edge operation, due to the machining error and assembly error of the parts, there is a certain error in the centering of the articulated half shaft and the primary and secondary planetary gears, which generates an axial force and causes the wear pad to wear out, and even the wear pad is crushed, thereby greatly reducing the performance reliability of the wheel edge assembly and being not conducive to the working stability and reliability of the whole vehicle. SUMMARY
[0003] The utility model wants to overcome the above prior art's insufficient, provide a simple structure, good effect's high rotational speed wheel edge assembly.
[0004] The utility model discloses a high rotational speed wheel edge assembly, including transmission shaft, the transmission shaft is connected with the wheel hub through multistage planetary gear transmission system, the end surface of transmission shaft and multistage planetary gear transmission system are equipped with automatic centering device, the automatic centering device includes the thrust bearing, the seat ring of thrust bearing is connected together with multistage planetary gear transmission system, the shaft ring of thrust bearing and transmission shaft clearance fit, high rotational speed wheel edge assembly still includes automatic lubrication system, the automatic lubrication system includes lubrication channel and oil reservoir, the lubrication channel sets up on automatic centering device, the oil reservoir sets up on the end surface of transmission shaft.
[0005] Further, the multistage planetary gear transmission system is a two-stage planetary gear transmission system, a primary sun gear is connected together with the transmission shaft, a primary planet carrier is connected together with a secondary sun gear, a secondary planet carrier is connected together with the wheel hub as an output end, a primary planet gear and a secondary planet gear share a same gear ring, and the gear ring is fixed through a gear ring support.
[0006] The seat ring of the thrust bearing is connected with the secondary sun gear.
[0007] The gap between the shaft ring of the thrust bearing and the transmission shaft is 0.5-1mm.
[0008] The automatic centering device comprises a thrust bearing, a clamping spring and a bearing seat, the seat ring of the thrust bearing is in interference fit with the bearing seat, and the bearing seat is fixed on the multi-stage planetary gear transmission through the clamping spring.
[0009] The bearing seat is a uniform hole bearing seat, and the lubrication channel of the automatic centering device is the uniform hole on the bearing seat.
[0010] The oil storage groove is a blind hole arranged on the end face of the transmission shaft.
[0011] The high-speed wheel rim assembly has the following advantages: the automatic centering device is arranged between the transmission shaft and the planetary gear transmission system, so that the axial force caused by braking error can be absorbed by the bearing; the automatic lubricating system is arranged between the transmission shaft and the automatic centering device, not only changes the lubrication field distribution in the driving wheel rim assembly, but also enables a large amount of lubricating oil to be accumulated, and the technical problems of wear and burn of the wear pad are ingeniously solved, and the compact space is ingeniously utilized, so that the reliability and working stability of the drive axle are greatly improved. BRIEF DESCRIPTION OF DRAWINGS
[0012] The accompanying drawings are part of the present application and serve to provide a further understanding of the present application, the illustrative embodiments of the present application and the description thereof serve to explain the present application, but do not constitute an improper limitation on the present application. Obviously, the drawings described below are only some embodiments, and other drawings can be obtained by those skilled in the art without creative labor.
[0013] In the drawings:
[0014] Fig. 1 is a schematic view of the overall structure of the present application;
[0015] Fig. 2 is a schematic view of the automatic centering device of the present application;
[0016] Fig. 3 is a schematic view of the uniform hole bearing seat of the present application;
[0017] Fig. 4 is a sectional view of the uniform hole bearing seat of the present application.
[0018] In the figure: 1, transmission shaft, 2, primary sun gear, 3, primary planetary gear, 4, primary planet carrier, 5, secondary sun gear, 6, secondary planetary gear, 7, secondary planet carrier, 8, wheel hub, 9, ring gear, 10, ring gear support, 11, end cover, 12, automatic centering device, 13, blind hole, 121, thrust bearing, 122, circlip, 123, bearing seat.
[0019] It should be noted that the drawings and the written description are not intended to limit the scope of the present application in any way, but are merely to illustrate the concept of the present application to those skilled in the art by referring to specific embodiments. DETAILED DESCRIPTION
[0020] In order to make the purpose, technical scheme and advantages of the embodiments of the present application more clear, the technical scheme in the embodiments will be described clearly and completely below with reference to the drawings in the embodiments of the present application. The following embodiments are used to illustrate the present application, but not to limit the scope of the present application.
[0021] In the description of the present application, it should be noted that the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "inner", "outer" and the like indicate the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present application.
[0022] In the description of the present application, it should be noted that unless otherwise explicitly specified and limited, the terms "mounting", "connecting", "connection" should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.
[0023] As Figs. 1-4The utility model provides a high speed wheel rim assembly, including transmission shaft 1, the wheel hub 8 is connected with through multistage planetary gear drive system, the end surface of transmission shaft 1 is equipped with automatic centering device 12 with multistage planetary gear drive system, automatic centering device 12 includes thrust bearing 121, the seat ring of thrust bearing 121 is connected together with multistage planetary gear drive system, the shaft ring of thrust bearing 121 is gap fit with transmission shaft 1, high speed wheel rim assembly still includes automatic lubricating system, automatic lubricating system includes lubricating channel and oil reservoir, lubricating channel sets up on automatic centering device 12, oil reservoir sets up on the end surface of transmission shaft 1, the high speed wheel rim assembly of the utility model mainly includes transmission shaft, multistage planetary gear drive system, wheel hub, automatic centering device and automatic lubricating system, transmission shaft, multistage planetary gear drive system and wheel hub constitute entire drive system, is equipped with automatic centering device and automatic lubricating system in drive system, wherein, automatic centering device sets up between transmission shaft and multistage planetary gear drive system, automatic centering device includes thrust bearing, thrust bearing is connected together with multistage planetary gear drive system through seat ring, and the clearance between the shaft ring of thrust bearing and the end surface of transmission shaft is equipped, when using, the contact component of seat ring and multistage planetary gear drive system synchronous operation, the shaft ring and transmission shaft synchronous operation, the relative rotational speed between the seat ring and the shaft ring of thrust bearing, this relative rotational speed is converted into the rotation of the roller of ball bearing, thereby eliminates the rotational speed difference between transmission shaft and multistage planetary gear drive system, can also automatically bear the axial force of the machining, assembly error, ingeniously solve the technical problem of wear pad wear, burnout, in addition, automatic lubricating system exists between transmission shaft and multistage planetary gear drive system, specifically including lubricating channel and oil reservoir, lubricating channel sets up on automatic centering device, can make the bearing seat of gear agitation flow a lot of oil, increase the flowability of lubricating oil, oil reservoir sets up on transmission shaft, is used to store lubricating oil, under the cooperation of lubricating channel and oil reservoir, can improve the lubricating performance of entire system, the high speed wheel rim assembly of the application through automatic centering device and automatic lubricating system, not only eliminates the rotational speed difference of key parts, simultaneously avoids the heat accumulation of entire wheel rim lubricating system, thereby guarantees the stable and reliable of double click wheel rim.
[0024] As Figs. 1-2The diagram illustrates a high-speed wheel assembly. The multi-stage planetary gear transmission system is a two-stage planetary gear transmission system. The first-stage sun gear 2 is connected to the drive shaft 1, the first-stage planetary carrier 4 is connected to the second-stage sun gear 5, and the second-stage planetary carrier 7, as the output end, is connected to the wheel hub 8. The first-stage planetary gear 3 and the second-stage planetary gear 6 share the same gear ring 9, which is fixed by a gear ring support 10. The seat ring of the thrust bearing 121 is connected to the second-stage sun gear 5. The entire wheel assembly of this invention consists of a first-stage transmission system and a second-stage transmission system. The first-stage sun gear is connected to the drive shaft via internal and external splines. The first-stage planetary carrier is connected to the second-stage sun gear via internal and external splines. The second-stage planetary carrier, i.e., the output end of the wheel assembly, is bolted to the wheel hub assembly. The end cap 11 is bolted to the second-stage planetary carrier. The first-stage planetary carrier assembly is connected to the wheel hub via bearings. The steering knuckle is connected to the gear ring support 10 via two bearings. The first and second-stage gear rings share one gear. Simultaneously, an automatic centering device is fixed to the second-stage sun gear, which is coaxial with the drive shaft.
[0025] like Figs. 1-2 The high-speed wheel assembly shown includes an automatic centering device 12 comprising a thrust bearing 121, a retaining ring 122, and a bearing housing 123. The bearing race of the thrust bearing 121 is interference-fitted with the bearing housing 123, and the bearing housing 123 is fixed to the multi-stage planetary gear transmission by the retaining ring 122. The clearance between the bearing race of the thrust bearing 121 and the transmission shaft 1 is 0.5-1mm. This utility model's automatic centering assembly includes a thrust bearing, a bearing housing, and a retaining ring. The thrust bearing and bearing housing are interference-fitted, and the outer circle of the bearing housing is interference-fitted with the inner hole of the secondary sun gear. The outer side of the bearing housing is fixed to the inner side of the sun gear by the retaining ring for axial positioning. According to the axial dimension chain, the left side of the thrust bearing maintains an axial clearance of 0.5-1mm with the end of the transmission shaft.
[0026] like Figs. 1-2 The high-speed wheel assembly shown has a bearing housing 123 with evenly distributed holes, and the lubrication channels of the automatic centering device 12 are the evenly distributed holes on the bearing housing 123. The oil reservoir is a blind hole 13 located on the end face of the drive shaft 1. The automatic lubrication system of this invention specifically comprises blind holes on the drive shaft and evenly distributed holes on the bearing housing. The blind holes at the end of the drive shaft have a certain depth, which helps to automatically store lubricating oil and avoid poor lubrication of the bearing housing rings due to high speeds. Simultaneously, the multiple evenly distributed holes around the circumference of the bearing housing allow for a large flow of oil when the gears are agitated, preventing heat accumulation and excessive wheel edge temperature caused by poor oil flow.
[0027] The high-speed wheel rim assembly of the utility model, including automatic centering device and automatic lubricating system, not only ingeniously utilizes the compact space, but also changes the lubrication field distribution inside the driving wheel rim assembly, so that a large amount of lubricating oil can be accumulated, and the axial force generated by the braking error can be absorbed by the bearing, effectively providing the reliability and working stability of the drive axle. Due to the large weight of the entire wheel rim assembly, in addition to the cumulative machining error of each part, the center axis of the articulated half shaft and the first and second sun wheel assemblies are misaligned, a certain small angle error occurs, and the cumulative machining error is amplified to a certain extent during the high-speed rotation of the entire wheel rim assembly, which easily causes the entire transmission shaft right end to be glued between the second sun wheel, exceeds the PV value of the wear pad itself, causes the wear pad to wear until gluing and dry grinding, the entire wheel rim appears a sudden temperature rise phenomenon, which seriously affects the reliability and service life of the entire drive axle. In the technical scheme of the application, when the wheel rim rotates at high speed, the rotational inertia generated by the high speed and the axial force generated by the axial error are transmitted to the thrust ball bearing, the transmission shaft right end surface is in contact with the thrust bearing, the rotational speed of the shaft is synchronized with the rotational speed of the articulated transmission shaft, at the same time, the race of the thrust bearing is synchronized with the rotational speed of the second sun wheel, and the relative rotational speed exists between the race and the shaft of the thrust ball bearing. The relative rotational speed is converted into the rotation of the ball bearing roller, thereby avoiding the speed difference between the transmission shaft and the second sun wheel, which can not only eliminate the relative rotational speed difference, but also automatically bear the axial force caused by the machining and assembly error, and ingeniously solve the technical problems of wear and burnout of the wear pad. The self-circulating lubricating system can ensure that the above centering structure is fully lubricated, the transmission shaft end is provided with a blind hole for oil accumulation, the lubricating effect of the bearing race can be improved, the uniformly distributed hole bearing seat can make the gear stir up the bearing seat to flow a lot of oil, avoid the heat accumulation caused by poor lubricating oil flow and the high temperature of the wheel rim, and the above ingenious design of the entire wheel rim structure not only eliminates the speed difference of the key parts, but also avoids the accumulation of heat of the entire wheel rim lubricating system, thereby ensuring the stability and reliability of the double-click wheel rim.
[0028] In the specification provided herein, a large number of specific details are described. However, it can be understood that the embodiments of the utility model can be practiced without these specific details. In some examples, well-known methods, structures and techniques are not shown in detail, so as not to obscure the understanding of the specification.
[0029] In addition, those skilled in the art can understand that, although some embodiments described herein include certain features included in other embodiments rather than other features, combinations of features of different embodiments also mean to be within the protection scope of the present application and form different embodiments. For example, in the above embodiments, those skilled in the art can use in a combined manner according to the known technical solutions and the technical problems to be solved by the present application.
[0030] The above is only the preferred embodiment of the present application, and does not limit the present application in any form. Although the present application has been disclosed as above with the preferred embodiment, it is not intended to limit the present application. Any skilled person in the art can make some changes or modifications within the scope of the technical solutions of the present application by using the above-mentioned technical content, and equivalent embodiments with equivalent changes are equivalent. Any simple modification, equivalent change and modification of the above embodiments according to the technical essence of the present application are still within the scope of the present application.
Claims
1. A high-speed wheel-side assembly, characterized in that: The assembly includes a drive shaft (1), which is connected to a hub (8) via a multi-stage planetary gear transmission system. An automatic centering device (12) is provided between the end face of the drive shaft (1) and the multi-stage planetary gear transmission system. The automatic centering device (12) includes a thrust bearing (121), the seat ring of which is connected to the multi-stage planetary gear transmission system. The shaft ring of the thrust bearing (121) is clearance-fitted with the drive shaft (1). The high-speed wheel assembly also includes an automatic lubrication system, which includes a lubrication channel and an oil reservoir. The lubrication channel is located on the automatic centering device (12), and the oil reservoir is located on the end face of the drive shaft (1).
2. The high-speed wheel-side assembly as described in claim 1, characterized in that: The multi-stage planetary gear transmission system is a two-stage planetary gear transmission system. The first-stage sun gear (2) is connected to the transmission shaft (1), the first-stage planet carrier (4) is connected to the second-stage sun gear (5), and the second-stage planet carrier (7) is connected to the hub (8) as the output end. The first-stage planetary gear (3) and the second-stage planetary gear (6) share the same gear ring (9), which is fixed by the gear ring support (10).
3. The high-speed wheel-side assembly as described in claim 2, characterized in that: The seat ring of the thrust bearing (121) is connected to the secondary sun gear (5).
4. A high-speed wheel-side assembly as described in claim 1, characterized in that: The clearance between the shaft ring of the thrust bearing (121) and the transmission shaft (1) is 0.5-1mm.
5. A high-speed wheel-side assembly as described in claim 1, characterized in that: The automatic centering device (12) includes a thrust bearing (121), a snap ring (122) and a bearing housing (123). The seat ring of the thrust bearing (121) and the bearing housing (123) are interference fit. The bearing housing (123) is fixed to the multi-stage planetary gear transmission by the snap ring (122).
6. A high-speed wheel-side assembly as described in claim 5, characterized in that: The bearing housing (123) is a bearing housing with evenly distributed holes, and the lubrication channel of the automatic centering device (12) is an evenly distributed hole on the bearing housing (123).
7. A high-speed wheel-side assembly as described in claim 1, characterized in that: The oil reservoir is a blind hole (13) located on the end face of the drive shaft (1).