CN111688409A

CN111688409A - Hub reduction axle structure, vehicle, mounting method and dismounting method

Info

Publication number: CN111688409A
Application number: CN202010536778.XA
Authority: CN
Inventors: 王伟康; 刘宇; 段振中; 刘培林; 张再利
Original assignee: CRRC Qishuyan Institute Co Ltd
Current assignee: CRRC Qishuyan Institute Co Ltd
Priority date: 2020-06-12
Filing date: 2020-06-12
Publication date: 2020-09-22

Abstract

The embodiment of the invention provides a hub reduction axle structure, a vehicle, an installation method and a disassembly method, and relates to the technical field of vehicle parts. The wheel-side speed reducing bridge structure provided by the embodiment of the invention comprises a frame, a hub and a main bearing. The main bearing is arranged between the frame and the hub, so that the hub and the frame are rotatably connected through the main bearing. The main bearing comprises an inner ring and an outer ring which are in mutual rotating fit, the outer ring is matched with the hub, and the inner ring is in clearance fit with the rack. Because the inner circle and the frame clearance fit of base bearing, consequently need not to realize the dismantlement of inner circle through disassembling the frock, the dismantlement of inner circle is convenient, just also need not to reserve the space of disassembling that holds the frock of disassembling in the axial one side of inner circle simultaneously to help shortening the axial length of frame, and then lighten the weight, the reduce cost of frame. And because the inner ring of the main bearing is in clearance fit with the rack, the inner ring can be more easily installed on the rack, and the installation is simple and the installation efficiency is high.

Description

Hub reduction axle structure, vehicle, mounting method and dismounting method

Technical Field

The invention relates to the technical field of vehicle parts, in particular to a hub reduction axle structure, a vehicle, an installation method and a disassembly method.

Background

In recent years, wheel reduction axles have found widespread use in the field of vehicles, in particular heavy vehicles. And a hub in the hub reduction bridge is supported on the frame through a main bearing, so that the hub is rotatably connected with the frame. Thereby the power input shaft of hub reduction bridge wears to establish in the frame and transmits power to the reduction gear of setting in frame one side, and the reduction gear is connected with wheel hub transmission to drive the relative frame rotation of wheel hub.

The existing main bearing inner ring is arranged on a machine frame in an interference manner through heating, so that a special disassembling tool needs to be adopted for disassembling during the disassembling process, a disassembling space needs to be preset on one side of the inner ring, the disassembling tool can smoothly rotate on the inner ring through the disassembling space, the inner ring is disassembled, the disassembling process is complex, and the required machine frame is long in length.

Disclosure of Invention

The invention aims to provide a hub reduction bridge structure which can reduce the difficulty of mounting and dismounting a main bearing and is beneficial to shortening the length of a frame.

The invention also aims to provide a vehicle, which can reduce the difficulty in mounting and dismounting the main bearing and is beneficial to shortening the length of the frame.

The object of the invention is also to provide a method of mounting which alleviates the problem of difficult mounting of a wheel reduction axle construction.

The invention also aims to provide a disassembling method which can relieve the problem of difficult disassembly of the hub reduction axle structure.

Embodiments of the invention may be implemented as follows:

the embodiment of the invention provides a hub reduction bridge structure, which comprises a rack, a hub and a main bearing arranged between the rack and the hub, wherein the main bearing comprises an inner ring and an outer ring which are in mutual rotating fit, the inner ring is in clearance fit with the rack, and the outer ring is in fit with the hub.

Optionally, be provided with first sclerosis layer on the frame, the frame passes through first sclerosis layer with inner circle clearance fit.

Optionally, the frame has a first mating surface that mates with the inner ring, and the first mating surface is case hardened to form the first hardened layer.

Optionally, the hub reduction bridge structure further comprises a hardening sleeve, and the hardening sleeve is sleeved on the frame to form the first hardening layer.

Optionally, the main bearing includes a first bearing and a second bearing arranged at an interval in the axial direction of the frame, and an inner ring of the first bearing and an inner ring of the second bearing are both in clearance fit with the frame.

Optionally, the first bearing and the second bearing are both tapered roller bearings, and the first bearing and the second bearing are arranged back to back.

Optionally, the main bearing is a tapered roller bearing and/or a cylindrical roller bearing.

Optionally, the wheel limit reduction bridge structure still includes the locating part, the locating part is provided with the second sclerosis layer, just the locating part passes through the second sclerosis layer contradict in the terminal surface of inner circle, in order to restrict the axial position of inner circle.

Optionally, the limiting member has a second matching surface abutting against the end surface of the inner ring, and the second matching surface is surface-hardened to form the second hardened layer.

Optionally, the wheel reduction axle structure still includes the sclerosis pad, the sclerosis pad sets up on the locating part, just the sclerosis pad is located the locating part with between the terminal surface of inner circle, in order to form the second sclerosis layer.

Optionally, the locating part is the seal receptacle that floats, the seal receptacle that floats install in the frame, just the terminal surface of the seal receptacle that floats is provided with second sclerosis layer, the seal receptacle that floats passes through second sclerosis layer contradict in the terminal surface of inner circle.

Optionally, the locating part is for connecting the fluted disc, connect the fluted disc connect in the frame, just the terminal surface of connecting the fluted disc is provided with second sclerosis layer, it passes through to connect the fluted disc second sclerosis layer contradict in the terminal surface of inner circle.

The embodiment of the invention also provides a vehicle. The vehicle comprises a wheel-side speed reduction bridge structure, wherein the wheel-side speed reduction bridge structure comprises a rack, a wheel hub and a main bearing arranged between the rack and the wheel hub, the main bearing comprises an inner ring and an outer ring which are in mutual rotation fit, the inner ring is in clearance fit with the rack, and the outer ring is in clearance fit with the wheel hub.

The embodiment of the invention also provides an installation method for installing the hub reduction bridge structure, the hub reduction bridge structure comprises a rack, a hub, a floating seal seat, a connecting fluted disc, a first bearing and a second bearing, and the installation method comprises the following steps:

mounting the floating seal mount to the frame;

sleeving the inner ring of the first bearing on the rack, abutting the inner ring of the first bearing against the floating sealing seat for limiting, and performing clearance fit between the inner ring of the first bearing and the rack;

installing the outer ring of the first bearing and the outer ring of the second bearing on the wheel hub, sleeving the wheel hub with the outer ring of the first bearing and the outer ring of the second bearing on the rack, and enabling the inner ring of the first bearing to be in running fit with the outer ring of the first bearing;

sleeving an inner ring of the second bearing on the rack, wherein the inner ring of the second bearing is in running fit with an outer ring of the second bearing;

and connecting the connecting fluted disc to the rack, and enabling the connecting fluted disc to be abutted against the inner ring of the second bearing for limiting.

The embodiment of the invention also provides a dismounting method for dismounting the hub reduction axle structure, the hub reduction axle structure comprises a rack, a hub, a connecting fluted disc, a first bearing and a second bearing, and the dismounting method comprises the following steps:

detaching the connecting fluted disc from the frame;

removing an inner race of the second bearing clearance-fitted to the housing from the housing;

removing the hub with the outer ring of the first bearing and the outer ring of the second bearing from the frame;

removing an inner race of the first bearing clearance-fitted to the frame from the frame.

The wheel reduction axle structure, the vehicle, the mounting method and the dismounting method provided by the embodiment of the invention have the beneficial effects that:

the embodiment of the invention provides a hub reduction bridge structure which comprises a frame, a hub and a main bearing. The main bearing is arranged between the frame and the hub, so that the hub and the frame are rotatably connected through the main bearing. The main bearing comprises an inner ring and an outer ring which are in mutual rotating fit, the outer ring is matched with the hub, and the inner ring is in clearance fit with the rack. Because the inner circle and the frame clearance fit of base bearing, consequently need not to realize the dismantlement of inner circle through disassembling the frock, the dismantlement of inner circle is convenient, just also need not to reserve the space of disassembling that holds the frock of disassembling in the axial one side of inner circle simultaneously to help shortening the axial length of frame, and then lighten the weight of frame, reduction production and use cost. And because the inner ring of the main bearing is in clearance fit with the rack, the inner ring can be more easily installed on the rack, and the installation is simple and the installation efficiency is high.

Embodiments of the present invention also provide a vehicle including the above-described wheel-side reduction axle structure. Because this vehicle includes foretell wheel limit reduction bridge structure, consequently also have installation dismantlement convenience, efficient, frame length is short, light in weight, with low costs beneficial effect.

The embodiment of the invention also provides an installation method for installing the hub reduction axle structure, which is simpler than the existing method for installing the hub reduction axle structure and is beneficial to improving the installation efficiency.

The embodiment of the invention also provides a disassembling method for disassembling the hub reduction axle structure, which is simpler than the existing method for disassembling the hub reduction axle structure and is beneficial to improving the disassembling efficiency.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present invention and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained according to the drawings without inventive efforts.

Fig. 1 is a partial structural schematic view of a wheel-side reduction axle structure according to an embodiment of the present invention;

FIG. 2 is an enlarged view of a portion of FIG. 1 at II;

FIG. 3 is a schematic partial structure diagram of another wheel-side reduction axle structure according to an embodiment of the present invention;

FIG. 4 is an enlarged view of a portion of the structure at IV in FIG. 1;

FIG. 5 is a schematic diagram illustrating a partial structure of another wheel-side reduction axle structure according to an embodiment of the present invention;

fig. 6 is an enlarged view of a portion of the structure at vi in fig. 1.

Icon: 100-wheel reduction bridge structure; 110-a rack; 111-a first hardened layer; 112-a first hardened portion; 113-a second hardened portion; 120-a hub; 130-a main bearing; 131-a first bearing; 132-a first inner ring; 133-a first outer race; 134-a second bearing; 135-a second inner ring; 136-a second outer ring; 140-a brake; 141-brake ring gear; 142-a floating seal seat; 143-floating seal; 144-a first end face; 150-a reducer; 151-connecting fluted disc; 152-a second end face; 161-hardening sleeve; 162-hardening the pad.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. The components of embodiments of the present invention generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations.

Thus, the following detailed description of the embodiments of the present invention, presented in the figures, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures.

In the description of the present invention, it should be noted that if the terms "upper", "lower", "inside", "outside", etc. indicate an orientation or a positional relationship based on that shown in the drawings or that the product of the present invention is used as it is, this is only for convenience of description and simplification of the description, and it does not indicate or imply that the device or the element referred to must have a specific orientation, be constructed in a specific orientation, and be operated, and thus should not be construed as limiting the present invention.

Furthermore, the appearances of the terms "first," "second," and the like, if any, are used solely to distinguish one from another and are not to be construed as indicating or implying relative importance.

It should be noted that the features of the embodiments of the present invention may be combined with each other without conflict.

Fig. 1 is a partial structural schematic view of a wheel-side reduction axle structure 100 provided in this embodiment, and fig. 2 is an enlarged partial structural schematic view at ii in fig. 1. Referring to fig. 1 and 2 in combination, the present embodiment provides a wheel-side reduction axle structure 100, and accordingly, provides a vehicle (not shown).

The vehicle includes a wheel-side reduction axle structure 100, while the vehicle also includes a vehicle body (not shown) and tires (not shown). The wheel reduction axle structure 100 is installed on the vehicle body while the tire is installed on the wheel reduction axle, and the power of the vehicle body is transmitted to the tire through the wheel reduction axle, thereby driving the tire to rotate.

Wheel reduction axle structure 100 includes a frame 110, a hub 120, and a main bearing 130. A main bearing 130 is arranged between frame 110 and hub 120 such that a rotational connection of hub 120 to frame 110 is achieved via main bearing 130. The main bearing 130 includes an inner race and an outer race that are rotationally engaged with each other, the outer race being engaged with the hub 120 and the inner race being clearance-fitted with the frame 110. Because the inner ring of the main bearing 130 is in clearance fit with the frame 110, the inner ring can be disassembled without disassembling the tool, the inner ring is convenient to disassemble, and meanwhile, a disassembling space for accommodating the disassembling tool is not required to be reserved on one axial side of the inner ring, so that the axial length of the frame 110 is favorably shortened, and the weight of the frame 110 is reduced, and the production and use costs are reduced. Moreover, the inner ring of the main bearing 130 is in clearance fit with the frame 110, so that the inner ring can be more easily mounted on the frame 110, and the mounting is simple and high in mounting efficiency.

The wheel reduction axle structure 100 provided in the present embodiment is further explained below:

referring to fig. 1 and fig. 2, in the present embodiment, the main bearing 130 is disposed between the frame 110 and the hub 120, an outer ring of the main bearing 130 is engaged with the hub 120, and optionally, the outer ring of the main bearing 130 is in interference fit with the hub 120. The inner ring of the main bearing 130 has a clearance fit with the frame 110, i.e. the inner diameter of the inner ring is larger than the outer diameter of the frame 110. The difference between the inner diameter of the inner ring and the outer diameter of the frame 110 may be specifically set according to requirements, for example, the difference between the inner diameter of the inner ring and the outer diameter of the frame 110 is a, where a is 0.03mm or more and is less than or equal to 0.07mm, and optionally, a is 0.03mm or more, 0.05mm or 0.07 mm.

Specifically, the main bearing 130 includes a first bearing 131 and a second bearing 134 arranged at an interval along the axial direction of the frame 110, and the first bearing 131 and the second bearing 134 support together to realize the rotational connection between the hub 120 and the frame 110, and the connection is reliable. The inner ring of the first bearing 131 is a first inner ring 132, the inner ring of the second bearing 134 is a second inner ring 135, and the first inner ring 132 and the second inner ring 135 are both sleeved on the outer peripheral surface of the rack 110 and are in clearance fit with the rack 110, so that the problems that the bearing inner rings are installed eccentrically in an interference manner and are difficult to be in place at one time are solved, and the installation is simpler and quicker. The outer ring of the first bearing 131 is a first outer ring 133, the outer ring of the second bearing 134 is a second outer ring 136, and the first outer ring 133 and the second outer ring 136 are both in interference fit with the hub 120, that is, the first outer ring 133 and the second outer ring 136 are both in interference fit on the inner side of the hub 120.

It should be noted that the number of the main bearings 130 is not limited herein, and it should be understood that in other embodiments, the number of the main bearings 130 may be specifically set according to actual requirements, for example, set to be one.

Optionally, the first bearing 131 and the second bearing 134 are both tapered roller bearings, and the first bearing 131 and the second bearing 134 are arranged back to back. Meanwhile, because the first bearing 131 and the second bearing 134 are both tapered roller bearings, the first bearing 131 and the second bearing 134 need to be subjected to clearance adjustment after being installed, and because the first inner ring 132 and the second inner ring 135 are in clearance fit with the frame 110, the clearance adjustment of the first bearing 131 and the second bearing 134 is simpler and more convenient. It is understood that in other embodiments, the types of the first bearing 131 and the second bearing 134 may be set according to actual requirements, for example, the first bearing 131 and the second bearing 134 are set as cylindrical roller bearings, or one of the first bearing 131 and the second bearing 134 is set as a tapered roller bearing and the other of the first bearing 131 and the second bearing 134 is set as a cylindrical roller bearing.

Further, the frame 110 is provided with a first hardened layer 111. The first hardened layer 111 is located between the frame 110 and the inner ring of the main bearing 130, that is, the frame 110 is in clearance fit with the inner ring through the first hardened layer 111, in other words, after the first hardened layer 111 is disposed on the frame 110, the inner ring is in clearance fit with the first hardened layer 111, and the outer diameter of the frame 110 is the radial dimension of the outer circumferential surface of the first hardened layer 111. The first hardened layer 111 prevents fretting wear from occurring on the outer peripheral surface of the frame 110 when the inner ring of the main bearing 130 rotates. Specifically, the first hardened layer 111 includes a first hardened portion 112 corresponding to the first inner ring 132 and a second hardened portion 113 corresponding to the second inner ring 135, and the frame 110 is clearance-fitted with the first inner ring 132 through the first hardened portion 112, while the frame 110 is clearance-fitted with the second inner ring 135 through the second hardened portion 113.

Alternatively, the frame 110 has a first mating surface that mates with the inner ring, and the first hardened layer 111 is formed by surface hardening the first mating surface. Specifically, a portion of the first mating surface corresponding to the first inner ring 132 is hardened to form the first hardened portion 112, and a portion of the first mating surface corresponding to the second inner ring 135 is hardened to form the second hardened portion 113. Optionally, the first matching surface is hardened by laser cladding. It will be appreciated that in other embodiments, other means of case hardening may be used, such as a carburizing process.

It should be noted that, in the present embodiment, the first hardened layer 111 is formed by performing surface hardening on the first mating surface of the frame 110, and it is understood that, in other embodiments, the first hardened layer 111 may be formed in other manners, for example, the hardened sleeve 161 is sleeved on the frame 110 to form the first hardened layer 111 (as shown in fig. 3), and the inner ring is in clearance fit with the hardened sleeve 161. Optionally, the hardening sleeve 161 is sleeved on the frame 110 and fixed on the frame 110 by welding.

In this embodiment, only the portion of the outer peripheral surface of the frame 110, which is engaged with the first inner ring 132 and the second inner ring 135, is the first engaging surface, and at the same time, only the first engaging surface is surface-hardened, in other words, the portion between the first inner ring 132 and the second inner ring 135 is not surface-hardened, it can be understood that, in other embodiments, the outer peripheral surface of the frame 110 may be surface-hardened, that is, in the axial direction of the frame 110, the first hardened layer 111 extends from the side of the first inner ring 132, which is away from the second inner ring 135, to the side of the second inner ring 135, which is away from the first inner ring 132, and similarly, when the first hardened layer 111 is formed by the hardened sleeve 161 sleeved on the frame 110, the hardened sleeve 161 may also be provided as a long sleeve extending from the side of the first inner ring 132, which is away from the second inner ring 135, to the side of the second.

In this embodiment, the wheel-side reduction axle structure 100 further includes a limiting member. The limiting part is provided with a second hardened layer, and meanwhile, the limiting part abuts against the end face of the inner ring through the second hardened layer, so that the axial position of the inner ring is limited. Because the limiting part is abutted against the inner ring through the second hardened layer, the surface of the limiting part can be prevented from fretting wear when the inner ring rotates through the second hardened layer. Specifically, because the first bearing 131 and the second bearing 134 are both tapered roller bearings, the axial limit only needs to be performed on one side of the first inner ring 132 away from the second inner ring 135, and the axial limit is performed on one side of the second inner ring 135 away from the first inner ring 132, so that the axial limit requirements of the inner ring of the first bearing 131 and the inner ring of the second bearing 134 can be met.

Fig. 4 is an enlarged view of a portion of the structure at iv in fig. 1. Referring to fig. 1 and 4, in the present embodiment, the hub reduction axle structure 100 further includes a brake 140 and a speed reducer 150 disposed at two ends of the hub 120. The speed reducer 150 is in transmission connection with the hub 120, and the power of the vehicle body is input to the speed reducer 150 through the input shaft, so that the speed is reduced and the torque is increased through the speed reducer 150, and then the power is transmitted to the hub 120, and the hub 120 is driven to rotate. The brake gear ring 141 of the brake 140 is in transmission connection with the hub 120, and when the brake 140 brakes, the brake on the hub 120 is realized through the brake gear ring 141. The brake 140 is provided with a floating seal seat 142 on the radially inner side of the brake ring gear 141, and a floating seal 143 is provided between the floating seal seat 142 and the brake ring gear 141, and sealing is achieved by the floating seal 143.

The first bearing 131 is disposed at one end of the hub 120 close to the brake 140, the floating seal seat 142 serves as a limiting member for axially limiting the first inner ring 132, and accordingly, a second hardened layer is disposed on the floating seal seat 142, and the floating seal seat 142 abuts against the first inner ring 132 through the second hardened layer, so that fretting wear of the floating seal seat 142 when the first inner ring 132 rotates is avoided through the second hardened layer. It should be noted that, the limiting element is not limited herein, and it should be understood that, in other embodiments, the structure type of the limiting element may be specifically set according to requirements, and the limiting element may be capable of abutting against the end surface of the first bearing 131 to realize axial limiting of the first bearing 131.

Furthermore, the limiting piece is provided with a second matching surface which is abutted against the end surface of the inner ring, and the surface of the second matching surface is hardened to form a second hardened layer. Specifically, when the floating seal seat 142 is used as a limiting member, the second mating surface is an end surface of the floating seal seat 142 close to one end of the first inner ring 132, the end surface is a first end surface 144, and the first end surface 144 is surface-hardened to form a second hardened layer. Optionally, the first end surface 144 is surface hardened by laser cladding. It will be appreciated that in other embodiments, other means of case hardening may be used, such as a carburizing process.

It should be noted that, in the present embodiment, the first end surface 144 forms the second hardened layer through surface hardening, and it is understood that, in other embodiments, the second hardened layer may also be formed in other manners, for example, by providing a hardened pad 162 at the first end surface 144, and the first end surface 144 is abutted against the end surface of the inner ring through the hardened pad 162, that is, the hardened pad 162 is disposed between the floating seal seat 142 and the end surface of the inner ring, so as to form the second hardened layer (as shown in fig. 5). Specifically, the stiffener pad 162 is annular to match the shape of the first end surface 144. Optionally, the hardened pad 162 is secured to the floating seal mount 142 by welding.

Fig. 6 is an enlarged view of a portion of the structure at vi in fig. 1. Referring to fig. 1 and fig. 6, in the present embodiment, the second bearing 134 is disposed at an end of the hub 120 close to the speed reducer 150, the connecting toothed disc 151 of the speed reducer 150 serves as a limiting member for limiting the axial direction of the second inner ring 135, and accordingly, the connecting toothed disc 151 is provided with a second hardened layer, and the connecting toothed disc 151 abuts against the second inner ring 135 through the second hardened layer, so as to prevent fretting wear of the connecting toothed disc 151 when the second inner ring 135 rotates.

Specifically, an end surface of the connecting toothed disc 151 near one end of the second inner ring 135 is a second mating surface of the limiting member, and the end surface is a second end surface 152, and the second end surface 152 is hardened to form a second hardened layer. Optionally, the first end surface 144 is surface hardened by laser cladding. It will be appreciated that in other embodiments, other means of case hardening may be used, such as a carburizing process. Similarly, the second hardened layer may also be formed by disposing the hardened pad 162 on the second end surface 152, in which case the hardened pad 162 is disposed in a circular ring shape matching the shape and size of the second end surface 152.

According to the hub reduction axle structure 100 provided by the embodiment, the working principle of the hub reduction axle structure 100 is as follows:

during installation, the brake 140 is installed on the frame 110, the first inner ring 132 and the tapered rollers of the first bearing 131 are sleeved on the frame 110 until the first inner ring 132 abuts against the second hardened surface of the floating seal seat 142, the first outer ring 133 and the second outer ring 136 are installed at the preset position of the hub 120 in an interference manner, the hub 120 is sleeved outside the frame 110 until the first outer ring 133 corresponds to the first inner ring 132 to form the complete first bearing 131, the second inner ring 135 and the tapered rollers of the second bearing 134 are sleeved on the frame 110 to form the complete second bearing 134 with the second outer ring 136, after installation, the first bearing 131 and the second bearing 134 are subjected to play adjustment, and finally the speed reducer 150 is installed, and the inner ring of the second bearing 134 is axially limited through the connecting toothed disc 151 of the speed reducer 150.

The wheel-side reduction axle structure 100 provided by the embodiment at least has the following advantages:

according to the hub reduction bridge structure 100 provided by the embodiment of the invention, the inner ring of the main bearing 130 is in clearance fit with the frame 110, so that the problems of eccentricity and difficulty in one-time installation in the interference installation of the inner ring are solved, the installation is more convenient and faster, and the installation efficiency is high. Meanwhile, the inner ring can be disassembled conveniently and quickly without disassembling tools, so that the disassembling space is not required to be reserved after the inner ring is installed, the rack 110 with shorter length can meet the installation requirement, the length of the rack 110 can be shortened, the weight and the cost are reduced, the main bearing 130 can be prevented from being damaged during disassembling, and the service life of the bearing can be prolonged. Meanwhile, parts in the hub reduction bridge structure 100, which are in contact with the inner ring, are all hardened, so that fretting wear of other parts due to rotation of the inner ring is avoided in the use process of the main bearing 130, and the service life is further prolonged.

The present embodiment also provides a vehicle, which includes the above-mentioned wheel-side reduction axle structure 100, and therefore, the vehicle also has the advantages of convenient and fast assembling and disassembling process, high efficiency, contribution to shortening the length of the frame 110, weight reduction, and long service life.

The present embodiment also provides a mounting method for mounting the above-described wheel reduction axle structure 100. Specifically, the installation method comprises the following steps:

s01: the floating seal mount 142 is mounted to the frame 110.

S02: the inner ring of the first bearing 131 is sleeved on the frame 110 and abutted against the floating seal seat 142 for limiting, and the inner ring of the first bearing 131 is in clearance fit with the frame 110.

Since the inner ring of the first bearing 131, that is, the first inner ring 132 is in clearance fit with the frame 110, the first inner ring 132 can be mounted on the frame 110 without processing the first inner ring 132 and using a tool until the first inner ring 132 abuts against the floating seal seat 142 in the axial direction of the frame 110, so that the axial position of the first inner ring 132 is limited by the floating seal seat 142.

S03: the outer ring of the first bearing 131 and the outer ring of the second bearing 134 are mounted on the hub 120, the hub 120 with the outer ring of the first bearing 131 and the outer ring of the second bearing 134 is sleeved on the frame 110, and the inner ring of the first bearing 131 is in rotating fit with the outer ring of the first bearing 131.

The outer ring of the first bearing 131, i.e. the first outer ring 133, is mounted on the hub 120 through interference, while the outer ring of the second bearing 134, i.e. the second outer ring 136, is mounted on the hub 120 through interference, and then the hub 120 with the first outer ring 133 and the second outer ring 136 is integrally sleeved on the frame 110 until the first outer ring 133 is matched with the first inner ring 132. Specifically, in the embodiment, the first bearing 131 is a tapered roller bearing, and therefore before the first outer ring 133 is installed, the tapered roller of the first bearing 131 needs to be sleeved on the first inner ring 132, so that after the first outer ring 133 is installed, the complete first bearing 131 is formed, and the first outer ring 133 and the first inner ring 132 are in running fit.

S04: the inner ring of the second bearing 134 is sleeved on the frame 110, and the inner ring of the second bearing 134 is rotatably matched with the outer ring of the second bearing 134.

The inner ring of the second bearing 134 is the second inner ring 135, and since the second bearing 134 is a tapered roller bearing, when the second inner ring 135 is installed, the tapered rollers of the second bearing 134 and the second inner ring 135 need to be installed together to form the complete second bearing 134, and the second inner ring 135 and the second outer ring 136 are in running fit.

S05: the connecting toothed disc 151 is connected to the frame 110, and the connecting toothed disc 151 abuts against the inner ring of the second bearing 134 for limiting.

The connecting fluted disc 151 is fixedly connected to the frame 110, and the connecting fluted disc 151 abuts against the end surface of the second inner ring 135, so that the axial direction of the second inner ring 135 is limited by the connecting fluted disc 151. Since the first bearing 131 and the second bearing 134 are both tapered roller bearings, the first bearing 131 and the second bearing 134 also need to be adjusted for play. It will be appreciated that when the first bearing 131 and the second bearing 134 are cylindrical roller bearings, no play adjustment is required.

Embodiments of the present invention also provide a disassembling method for disassembling the above-mentioned wheel-side reduction axle structure 100. Specifically, the disassembling method comprises the following steps:

s01: detaching the connecting cog 151 from the frame 110;

s02: the inner race of second bearing 134 clearance-fitted to frame 110 is removed from frame 110.

Since the second inner ring 135 is in clearance fit with the frame 110, the second inner ring 135 can be removed without using any auxiliary tool.

S03: the hub 120 with the outer race of the first bearing 131 and the outer race of the second bearing 134 is removed from the frame 110 as a whole.

S04: the inner race of the first bearing 131 clearance-fitted to the frame 110 is removed from the frame 110.

Since the first inner ring 132 is in clearance fit with the frame 110, the first inner ring 132 can be removed without using any auxiliary tool.

The above description is only for the specific embodiment of the present invention, but the scope of the present invention is not limited thereto, and any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present invention are included in the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the appended claims.

Claims

1. The utility model provides a hub reduction bridge structure, its characterized in that includes frame, wheel hub and sets up the frame with main bearing between the wheel hub, the main bearing includes mutual normal running fit's inner circle and outer lane, the inner circle with the frame clearance fit, the outer lane with wheel hub cooperation.

2. The hub reduction axle construction according to claim 1, wherein a first hardened layer is provided on the frame, and the frame is clearance-fitted with the inner ring through the first hardened layer.

3. The hub reduction axle construction of claim 2, wherein the frame has a first mating surface that mates with the inner race, the first mating surface being case hardened to form the first hardened layer.

4. The hub reduction axle construction of claim 2, further comprising a stiffening sleeve disposed over the frame to form the first stiffening layer.

5. The wheel reduction axle construction of claim 1 wherein the main bearing comprises first and second bearings spaced axially of the frame, the inner race of the first bearing and the inner race of the second bearing each having a clearance fit with the frame.

6. The wheel-side reduction axle structure according to claim 5, wherein the first bearing and the second bearing are both tapered roller bearings, and the first bearing and the second bearing are disposed back-to-back.

7. The wheel-side reduction bridge construction according to claim 1, wherein the main bearing is a tapered roller bearing and/or a cylindrical roller bearing.

8. The hub reduction bridge structure according to any one of claims 1 to 7, further comprising a limiting member, wherein the limiting member is provided with a second hardened layer, and the limiting member abuts against an end surface of the inner ring through the second hardened layer to limit an axial position of the inner ring.

9. The hub reduction axle structure according to claim 8, wherein the retaining member has a second mating surface that abuts against the end surface of the inner ring, and the second mating surface is surface-hardened to form the second hardened layer.

10. The hub reduction axle structure according to claim 8, further comprising a hardened pad disposed on the retaining member and located between the retaining member and the end face of the inner ring to form the second hardened layer.

11. The hub reduction bridge structure according to claim 8, wherein the limiting member is a floating seal seat, the floating seal seat is mounted on the frame, the second hardened layer is disposed on an end surface of the floating seal seat, and the floating seal seat abuts against an end surface of the inner ring through the second hardened layer.

12. The hub reduction axle structure according to claim 8, wherein the limiting member is a connecting toothed disc, the connecting toothed disc is connected to the frame, and the end surface of the connecting toothed disc is provided with the second hardened layer, and the connecting toothed disc collides with the end surface of the inner ring through the second hardened layer.

13. A vehicle characterized in that the vehicle includes the wheel-side reduction axle structure according to any one of claims 1 to 12.

14. An installation method is used for installing a hub reduction bridge structure, the hub reduction bridge structure comprises a rack, a hub, a floating sealing seat, a connecting fluted disc, a first bearing and a second bearing, and the installation method is characterized by comprising the following steps of:

mounting the floating seal mount to the frame;

15. A disassembling method is used for disassembling a hub reduction axle structure, the hub reduction axle structure comprises a frame, a hub, a connecting fluted disc, a first bearing and a second bearing, and the disassembling method is characterized by comprising the following steps:

detaching the connecting fluted disc from the frame;