Heavy-load hub reduction gear

Abstract

A heavy-load hub reduction gear comprises a transmission shaft, the transmission shaft is connected with a hub through a multi-stage planetary gear transmission system, an automatic centering device is arranged between the end face of the transmission shaft and the multi-stage planetary gear transmission system, the automatic centering device comprises a deep groove ball bearing, and an outer ring of the deep groove ball bearing is connected with the multi-stage planetary gear transmission system. The inner ring is connected with the transmission shaft, and the automatic lubricating system comprises a lubricating channel and an oil storage tank. According to the utility model, the automatic centering device is arranged between the transmission shaft and the planetary gear transmission system, so that the axial force generated by braking errors can be absorbed by the bearing; an automatic lubricating system is arranged between the transmission shaft and the automatic centering device, so that the distribution of a lubricating field in the driving wheel edge assembly is changed, a large amount of lubricating oil is accumulated, and the technical problems of abrasion and burnout of a wear-resistant pad are ingeniously solved; and the reliability and the working stability of the drive axle are greatly improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to engineering machinery technical field, concretely is a heavy load wheel edge reduction device. BACKGROUND

[0002] The crane is a kind of engineering machinery machine high-end product, and has the advantages of high-speed running and high off-road performance, is widely used in wind power, oil field, petrochemical and other major project fields.Drive axle as the end of the transmission system of the whole crane, for the power transmission of engine is reduced and increased in torsion, wheel edge reducer as a part of the whole drive axle assembly, under the condition of the vehicle use harsh, often run in the road condition of jolt, scene, especially highway working condition, this is higher to the reliability of wheel edge assembly, so that wheel edge assembly must have high performance, high speed, high reliability.The traditional wheel edge structure adopts one-stage speed ratio, and the whole wheel edge is low in weight and simple in structure, but for the high-tonnage crane with huge lifting capacity, especially under high-speed working condition, in order to better load and improve the driving performance of the whole vehicle, the whole wheel edge adopts two-stage transmission, and oil wear pad is arranged between the spline end of articulated transmission shaft and two-stage sun gear, but during the wheel edge running, due to the machining error and assembly error of parts, there is a certain error in the centering of articulated half shaft and one-two stage planetary gear, and the axial force generated thereby causes the wear of wear pad, and even the wear pad is crushed, so that the performance reliability of wheel edge assembly is greatly reduced, which is not conducive to the working stability and reliability of the whole vehicle. SUMMARY

[0003] The utility model solves the technical problems in the prior art, and provides a heavy load wheel edge reduction structure which is simple to release and good in effect.

[0004] The utility model is realized by the following technical scheme: a heavy load wheel edge reduction device, transmission shaft is connected with wheel hub through multistage planetary gear transmission system, and automatic centering device is arranged between the end surface of transmission shaft and multistage planetary gear transmission system, the automatic centering device includes deep groove ball bearing, the outer ring of deep groove ball bearing is connected together with multistage planetary gear transmission system, the inner ring of deep groove ball bearing is connected together with transmission shaft through bearing seat and keeps synchronous rotation, and the heavy load wheel edge reduction device further includes automatic lubricating system for lubricating automatic centering device, the automatic lubricating system includes lubricating channel and oil reservoir, and the lubricating channel and oil reservoir are arranged on automatic centering device.

[0005] Further, the multi-stage planetary gear transmission system is a two-stage planetary gear transmission system, a first sun gear is connected with a transmission shaft, a first planetary carrier is connected with a second sun gear, a second planetary carrier is connected with a wheel hub as an output end, a first planetary gear and a second planetary gear share a same gear ring, and the gear ring is fixed through a gear ring support.

[0006] The outer ring of the deep groove ball bearing is connected with the second sun gear, and the outer ring of the deep groove ball bearing is in interference fit with the second sun gear.

[0007] The automatic centering device comprises a deep groove ball bearing, a clamping spring and a bearing seat, the inner ring of the deep groove ball 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.

[0008] An end surface of the bearing seat is provided with a groove, an end surface of the transmission shaft is provided with a boss matched with the groove, and the groove and the boss are in clearance fit.

[0009] The boss is in the shape of a Chinese character, and the groove is in the shape of a cross.

[0010] The lubricating channel is an oil channel arranged in the axial direction of the bearing seat, the lubricating channel is a groove in the end surface of the bearing seat, and the oil channel and the groove are communicated.

[0011] The heavy-duty wheel edge reduction device has the following advantages: the automatic centering device arranged between the transmission shaft and the planetary gear transmission system can absorb the axial force generated by the braking error; the automatic lubricating system arranged between the transmission shaft and the automatic centering device not only changes the lubricating field distribution in the driving wheel edge assembly, but also accumulates a large amount of lubricating oil, thereby ingeniously solving the technical problems of wear and burn of the wear-resistant pad, and the technical scheme ingeniously utilizes the compact space, 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, and the schematic embodiments 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 an end surface of the bearing seat of the present application;

[0016] Fig. 3 is the end face schematic diagram of the transmission shaft of the utility model.

[0017] 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, 121, deep groove ball bearing, 122, circlip, 123, bearing seat, 124, groove, 125, boss, 126, oil passage.

[0018] It should be noted that these drawings and written descriptions are not intended to limit the scope of the concept of the utility model in any way, but to illustrate the concept of the utility model to those skilled in the art by referring to specific embodiments. DETAILED DESCRIPTION

[0019] In order to make the purpose, technical scheme and advantages of the embodiments of the utility model clearer, the technical scheme in the embodiments will be described clearly and completely below with reference to the drawings in the embodiments of the utility model, and the following embodiments are used to illustrate the utility model, but not to limit the scope of the utility model.

[0020] In the description of the utility model, 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 utility model 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, therefore it cannot be understood as a limitation on the utility model.

[0021] In the description of the utility model, it should be noted that unless otherwise explicitly specified and limited, the terms "mounting", "connection", "connection" should be understood broadly, for example, it can be fixed connection, or detachable connection, or integrally connected, it can be mechanical connection, or electrical connection, it can be directly connected, or indirectly connected through intermediate medium. For those skilled in the art, the specific meaning of the above terms in the utility model can be understood according to the specific circumstances.

[0022] As Figs. 1-3The utility model provides a kind of heavy load wheel edge reduction device, including transmission shaft 1, the wheel hub 8 is connected with the transmission shaft 1 by multi-stage planetary gear drive system, automatic centering device 12 is equipped between the end surface of transmission shaft 1 and multi-stage planetary gear drive system, the automatic centering device 12 includes deep groove ball bearing 121, the outer ring of deep groove ball bearing 121 is connected together with multi-stage planetary gear drive system, the inner ring of deep groove ball bearing 121 is connected together with transmission shaft 1 by bearing seat 123 and keeps synchronous rotation, heavy load wheel edge reduction device further includes automatic lubricating system for lubricating automatic centering device 12, the automatic lubricating system includes lubrication channel and oil reservoir, and the lubrication channel and oil reservoir are all arranged on automatic centering device 12.The heavy load wheel edge reduction device of the utility model mainly includes transmission shaft, multi-stage planetary gear drive system, wheel hub, automatic centering device and automatic lubricating system, transmission shaft, multi-stage planetary gear drive system and wheel hub form entire transmission system, and automatic centering device and automatic lubricating system are equipped in transmission system, wherein, automatic centering device is arranged between transmission shaft and multi-stage planetary gear drive system, and automatic centering device includes deep groove ball bearing, deep groove ball bearing is connected together with multi-stage planetary gear drive system by outer ring, and the inner ring of deep groove ball bearing is connected with transmission shaft by bearing seat, when using, the contact component of outer ring and multi-stage planetary gear drive system synchronous operation, and the inner ring and transmission shaft synchronous operation, so that the relative rotational speed of two parts is 0, when articulated half shaft is in high-speed operation, the axial force due to entire manufacturing error amplification is directly transmitted to deep groove ball bearing along transmission shaft, so that the entire axial force is directly transmitted wear pad is avoided, not only so that the rotational speed difference between transmission shaft and multi-stage planetary gear drive system is eliminated, but also automatically withstands the axial force caused by machining and assembly error, and the technical problems of wear and burn of wear pad are ingeniously solved;In addition, automatic lubricating system mainly provides lubricating oil for automatic centering device, and specifically includes lubrication channel and oil reservoir, and the lubrication channel and oil reservoir are all arranged on automatic centering device, for providing sufficient lubricating oil for transmission shaft and automatic centering device, to ensure that centering structure is fully lubricated;The heavy load wheel edge reduction device of the application is through automatic centering device and automatic lubricating system, not only eliminates the rotational speed difference of key parts, but also avoids the accumulation of heat of entire wheel edge lubricating system, to ensure the smooth and reliable of double-click wheel edge.

[0023] As Fig. 1The heavy load wheel edge reduction device is shown, the multi-stage planetary gear transmission system is two-stage planetary gear transmission system, the first sun gear 2 is connected with the transmission shaft 1 together, the first planetary carrier 4 is connected with the second sun gear 5 together, the second planetary carrier 7 is connected with the wheel hub 8 together as an output end, the first planetary gear 3 and the second planetary gear 6 share the same gear ring 9, and the gear ring 9 is fixed through the gear ring support 10. The outer ring of the deep groove ball bearing 121 is connected with the second sun gear 5 together, and the outer ring of the deep groove ball bearing 121 is in interference fit with the second sun gear 5. The whole wheel edge system of the utility model is composed of a first transmission system and a second transmission system, wherein the first sun gear is connected with the transmission shaft through inner and outer splines, the first planetary carrier is connected with the second sun gear through inner and outer splines, the second planetary carrier, that is, the wheel edge assembly output end, is fixedly connected with the wheel hub assembly through bolts, the end cover 11 is fixedly connected with the second planetary carrier through bolts, the first planetary carrier assembly is connected with the wheel hub through a bearing, the knuckle is connected with the gear ring support 10 through two bearings, the first and second gear rings share one, and simultaneously, the automatic centering device is fixed on the second sun gear, and the second sun gear is coaxial with the transmission shaft.

[0024] As Fig. 1 shown in a kind of heavy load wheel edge reduction device, the automatic centering device 12 includes deep groove ball bearing 121, clasp 122 and bearing seat 123, the inner ring of the deep groove ball bearing 121 is in interference fit with bearing seat 123, and the bearing seat 123 is fixed on multi-stage planetary gear transmission through clasp 122. The automatic centering assembly of the utility model includes deep groove ball bearing, bearing seat and clasp, wherein deep groove ball bearing is assembled in interference fit with second sun gear, bearing seat is in interference fit with deep groove ball bearing, and deep groove ball bearing is limited on the inner side by sun gear step and is limited on the outer side by clasp.

[0025] As Figs. 1-3 shown in a kind of heavy load wheel edge reduction device, the end face of the bearing seat 123 is provided with recess 124, the end face of the transmission shaft 1 is provided with boss 125 for cooperating with recess 124, and the recess 124 and the boss 125 are in clearance fit. The boss 125 is a character type, and the recess 124 is a cross type. The bearing seat and the transmission shaft of the utility model are connected together in the mode that boss and recess are used, wherein the bearing seat is a "cross" recess, the transmission shaft end face is a "character" boss, the recess is wider than the thickness of the boss, and the "character" boss is just inserted into any one groove of the "cross" recess, so that the relative rotation speed of the two parts is 0, and the rotation speed difference is eliminated.

[0026] As Figs. 1-2The heavy load wheel edge reduction device shown, the lubricating channel is the oil channel 126 arranged on the bearing seat 123 in the axial direction, the lubricating channel is the groove 124 of the end surface of the bearing seat, and the oil channel 126 is communicated with the groove 124. The automatic lubricating system of the utility model, an oil passing through hole is designed in the middle of the bearing seat, and the end surface of the bearing seat is designed into a cross groove, which is used not only for assembly and combination with the boss seat, but also for better accumulation of lubricating oil, so as to ensure the stable and reliable double-click wheel edge.

[0027] The heavy load wheel edge reduction device of the utility model, comprising an automatic centering device and an automatic lubricating system, not only ingeniously utilizes the compact space, but also changes the lubricating field distribution in the inside of the drive wheel edge 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 edge assembly and the cumulative machining error of each part, the center axis of the hinged half shaft is misaligned with the primary sun gear assembly and the secondary sun gear assembly, 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 edge assembly, which easily causes the bonding between the right end of the entire transmission shaft and the secondary sun gear, exceeds the PV value that the wear pad can withstand, causes the wear pad to wear until bonding and dry grinding, and the temperature of the entire wheel edge rises suddenly, which seriously affects the reliability and service life of the entire drive axle. In the technical scheme of the present application, when the wheel edge 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 deep groove ball bearing, so that the transmission shaft and the secondary sun gear on both sides of the deep groove ball bearing rotate at the same speed, avoiding the speed difference between the transmission shaft and the secondary sun gear. This structure not only eliminates the relative speed difference, but also automatically bears the axial force caused by the machining and assembly error, ingeniously solving 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, and the oil channel arranged in the bearing seat and the groove arranged at the end of the bearing seat are used in cooperation, so that the lubricating oil can be better accumulated. The ingenious design of the entire wheel edge structure not only eliminates the speed difference of the key parts, but also avoids the accumulation of heat in the entire wheel edge lubricating system, thereby ensuring the stable and reliable double-click wheel edge.

[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 in order not to obscure the understanding of the present 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 heavy duty wheel edge reduction device characterized by: The application relates to a heavy-load wheel-side reduction device, which comprises a transmission shaft (1) connected with a wheel hub (8) through a multi-stage planetary gear transmission system, and an automatic centering device (12) arranged between the end surface of the transmission shaft (1) and the multi-stage planetary gear transmission system, wherein the automatic centering device (12) comprises a deep groove ball bearing (121), the outer ring of the deep groove ball bearing (121) is connected with the multi-stage planetary gear transmission system, the inner ring of the deep groove ball bearing (121) is connected with the transmission shaft (1) through a bearing seat (123) to keep synchronous rotation, and the heavy-load wheel-side reduction device further comprises an automatic lubricating system for lubricating the automatic centering device (12), wherein the automatic lubricating system comprises a lubricating channel and an oil storage groove, and the lubricating channel and the oil storage groove are arranged on the automatic centering device (12).

2. A heavy duty wheel edge reduction device as claimed in claim 1, characterized in that: The multi-stage planetary gear transmission system is a two-stage planetary gear transmission system, a primary sun gear (2) is connected with the transmission shaft (1), a primary planet carrier (4) is connected with a secondary sun gear (5), a secondary planet carrier (7) is connected with the wheel hub (8) as an output end, a primary planet gear (3) and a secondary planet gear (6) share a same ring gear (9), and the ring gear (9) is fixed through a ring gear support (10).

3. A heavy duty wheel edge reduction device as claimed in claim 2, characterised in that: The outer ring of the deep groove ball bearing (121) is connected with the secondary sun gear (5), and the outer ring of the deep groove ball bearing (121) is in interference fit with the secondary sun gear (5).

4. A heavy duty wheel edge reduction device as claimed in claim 1, characterized in that: The automatic centering device (12) comprises the deep groove ball bearing (121), a clamping spring (122) and the bearing seat (123), the inner ring of the deep groove ball bearing (121) is in interference fit with the bearing seat (123), and the bearing seat (123) is fixed on the multi-stage planetary gear transmission system through the clamping spring (122).

5. A heavy duty wheel edge reduction device as claimed in claim 1, characterized in that: The end surface of the bearing seat (123) is provided with a groove (124), the end surface of the transmission shaft (1) is provided with a boss (125) matched with the groove (124), and the groove (124) and the boss (125) are in clearance fit.

6. A heavy duty wheel edge reduction device as claimed in claim 5, characterised in that: The boss (125) is in the shape of a Chinese character 'yi', and the groove (124) is in the shape of a cross.

7. A heavy duty wheel edge reduction device as claimed in claim 5, characterized in that: The lubricating channel is an oil channel (126) arranged in the axial direction of the bearing seat (123), the lubricating channel is a groove (124) on the end surface of the bearing seat (123), and the oil channel (126) is communicated with the groove (124).

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