阅读说明：本技术 用于高空作业平台的轮毂及包括该轮毂的高空作业平台 (Wheel hub for aerial work platform and aerial work platform comprising wheel hub ) 是由 何平 李琳桦 李历 陈峻源 杨茜 于 2020-05-19 设计创作，主要内容包括：本发明提供了一种用于高空作业平台的轮毂。在一个实施例中,一种用于高空作业平台的轮毂,包括：壳体(1),具有本体(10)和与本体一体形成的安装法兰(3),本体具有相对的第一端口(11)和第二端口(12),以及连通第一端口和第二端口的装配空间(13),安装法兰在靠近第二端口处一体地形成,用于将壳体安装至该高空作业平台的车体；和输出轴(2),被装配至装配空间内,并且输出轴的输出端(21)经由第一端口延伸到装配空间之外,输出轴的输出端用于连接该高空作业平台的车轮。本发明还提供了一种包括该轮毂的高空作业平台。(The invention provides a hub for an aerial work platform. In one embodiment, a hub for an aerial work platform, comprising: a housing (1) having a body (10) with first and second opposing ports (11, 12) and a mounting flange (3) integrally formed therewith, the mounting flange being integrally formed adjacent the second port for mounting the housing to the body of the aerial work platform, and a mounting space (13) communicating the first and second ports; and an output shaft (2) fitted into the fitting space, and an output end (21) of the output shaft extending out of the fitting space via the first port, the output end of the output shaft being for connection to a wheel of the aerial work platform. The invention also provides an aerial work platform comprising the hub.)

1. A hub for an aerial work platform, the hub comprising:

a housing (1) having a body (10) with first and second opposing ports (11, 12) and a mounting flange (3) integrally formed therewith, the mounting flange being integrally formed adjacent the second port for mounting the housing to a carbody of the aerial work platform; and

an output shaft (2) fitted into the fitting space and having an output end (21) extending out of the fitting space via the first port, the output end of the output shaft being for connection to a wheel of the aerial work platform.

2. The hub of claim 1,

the radial dimension of the first port and the radial dimension of the second port are both greater than the radial dimension of the fitting space.

3. The hub of claim 1,

the hub further comprises a first bearing (4) and a second bearing (5) for supporting the output shaft (2);

the housing also has an inner surface (14) facing the fitting space, the inner surface being formed with a boss (16) facing the fitting space, a side of the boss near the first port forming a first axial positioning plane (161) for positioning a first bearing (4), and a side of the boss near the second port forming a second axial positioning plane (162) for positioning a second bearing (5).

4. A hub according to any of claims 1-3, wherein the body has a substantially hollow cylindrical shape, the inner surface of the body being a cylindrical shaped inner side surface having different diameters, the outer surface of the body being a cylindrical shaped outer side surface.

5. A hub according to any of claims 1-3,

the mounting flange is formed by extending radially outwards from the outer surface of the body; and

the mounting flange has a plurality of mounting holes (31) spaced apart from each other, at least two adjacent mounting holes of the plurality of mounting holes forming a groove structure (32) therebetween recessed toward the outer surface of the body.

6. The hub of claim 5,

the groove structure is an arc-shaped groove structure.

7. A hub according to any of claims 1-3,

the housing also has a male end (17) formed by the surface of the mounting flange facing the second port side and the cylindrical outer surface of the body on the second port side.

8. The hub of claim 3, further comprising:

a shaft seal (6) fitted to the first port of the housing to seal a space between the body and the output shaft, the shaft seal being formed with a through hole (61) adapted for an output end of the output shaft to pass therethrough; and

a cover (7), formed from a thin plate, press-fitted into the second port of the housing.

9. The hub of claim 8,

the output shaft further having a bearing end (22) disposed opposite the output end (21), the output end and the bearing end being separated by an annular projection (23), the annular projection (23) being located within the body and spaced from the shaft seal;

the first bearing and the second bearing are tapered roller bearings and are mounted back-to-back;

one of the two opposite side faces of the first bearing abuts against the first axial positioning plane and the other of the two opposite side faces of the first bearing abuts against the annular protrusion; and

one of the two opposite side surfaces of the second bearing abuts against the second axial positioning plane, and the other of the two opposite side surfaces of the second bearing is axially locked by a fastener, thereby axially positioning the output shaft relative to the housing.

10. An aerial work platform, comprising: a hub as claimed in any one of claims 1 to 9.

Technical Field

The invention relates to the technical field of aerial work platforms, in particular to a hub for an aerial work platform and an aerial work platform comprising the hub.

Background

In the prior art, a vehicle hub used in an aerial work platform is generally assembled by a housing, an output shaft, a rear cover formed with an assembly flange, a fastening bolt, a front cover, a rear cover, a bearing and the like. Specifically, the housing and the rear cover are fitted to each other by fastening bolt fitting to define a fitting space together, the output shaft is fitted into the inner space via the bearing, and the output end of the output shaft protrudes from the front end of the housing to be connected to the wheel, while the entire hub after fitting is coupled to the vehicle body via the fitting of the fastener and the fitting flange. Further, the front cover and the rear cover are fitted to the front end of the housing and the rear end of the rear cover, respectively, by fastener fitting. In addition, the vehicle hub needs to be designed to meet the requirements of factors such as hydraulic drive, and the shape of the vehicle hub is generally complicated.

It can be seen that the vehicle hub for the aerial work platform provided in the prior art has a large number of assembling parts and high assembling cost. At present, more and more aerial work platforms use two motors to drive vehicles, and other two wheels do not need hydraulic brakes and are only supported by hubs, so that the aerial work platforms need to be adapted to the hubs with low cost.

BRIEF SUMMARY OF THE PRESENT DISCLOSURE

The invention provides a hub for an aerial work platform, which can reduce the number of assembly parts and reduce the assembly cost. Meanwhile, the invention also provides an aerial work platform comprising the hub, which can reduce the number of assembling parts and the assembling cost.

According to an aspect of an embodiment of the present invention, there is provided a hub for an aerial work platform, comprising:

a housing having a body with first and second opposing ports and a mounting flange integrally formed with the body, the mounting flange being integrally formed proximate the second port for mounting the housing to a carbody of the aerial work platform; and

an output shaft fitted into the fitting space and having an output end extending out of the fitting space via the first port, the output end of the output shaft for connection to a wheel of the aerial work platform.

In some embodiments, a radial dimension of the first port and a radial dimension of the second port are both greater than a radial dimension of the fitting space.

In some embodiments, the hub further comprises a first bearing and a second bearing for supporting an output shaft; the shell is also provided with an inner surface facing the assembling space, the inner surface is provided with a boss facing the assembling space, the side surface of the boss close to the first port forms a first axial positioning plane for positioning the first bearing, and the side surface of the boss close to the second port forms a second axial positioning plane for positioning the second bearing.

In some embodiments, the body has a substantially hollow cylindrical shape, the inner surface of the body is an inner side surface of the cylindrical shape having different diameters, and the outer surface of the body is an outer side surface of the cylindrical shape.

In some embodiments, the mounting flange is formed extending radially outward from an outer surface of the body; and the mounting flange is provided with a plurality of mounting holes which are spaced apart from each other, and at least two adjacent mounting holes in the plurality of mounting holes form a groove structure which is formed by being sunken towards the outer surface of the body.

In some embodiments, the groove structure is an arcuate groove structure.

In some embodiments, the housing further has a male end formed by a surface of the mounting flange facing the second port side and a cylindrical outer surface of the body on the second port side.

In some embodiments, the hub may further comprise: a shaft seal fitted to the first port of the housing to seal a space between the body and the output shaft, the shaft seal being formed with a through hole adapted for an output end of the output shaft to pass therethrough; and a cover formed of a thin plate press-fitted into the second port of the housing.

In some embodiments, the output shaft further has a bearing end disposed opposite the output end, the output end and the bearing end being separated by an annular projection portion, the annular projection being located within the body and spaced from the shaft seal; the first bearing and the second bearing are tapered roller bearings and are mounted back-to-back; one of the two opposite side faces of the first bearing abuts against the first axial positioning plane and the other of the two opposite side faces of the first bearing abuts against the annular protrusion; and one of the two opposite side surfaces of the second bearing abuts against the second axial positioning plane, and the other of the two opposite side surfaces of the second bearing is axially locked by a fastener, thereby axially positioning the output shaft relative to the housing.

According to another aspect of the embodiments of the present invention, there is also provided an aerial work platform, including a hub as described in any one of the previous embodiments.

According to the hub for the aerial work platform and the aerial work platform comprising the hub, which are provided by the embodiment of the invention, the shell and the rear cover of the hub in the prior art are formed into an integral shell component, the rear cover and the assembly fastener thereof in the prior art are omitted, the number of assembly components is reduced, and the assembly cost is reduced. In addition, according to the hub for the aerial work platform and the aerial work platform comprising the hub, which are provided by the embodiment of the invention, the groove structure is formed on the mounting flange of the hub, so that the weight of the shell is reduced, and the manufacturing cost is reduced. In addition, the hub for the aerial work platform and the aerial work platform comprising the hub provided by the embodiment of the invention have the advantages that the bosses are designed on the inner surface of the hub shell to realize the axial positioning of the first bearing and the second bearing, so that the first bearing and the second bearing can bear larger radial and axial loads. The hub is simple in overall structure, low in cost and reliable in function.

Drawings

FIG. 1 is a schematic structural view of a hub according to an embodiment of the present invention;

FIG. 2 is another schematic structural view of a hub according to an embodiment of the present invention;

FIG. 3 is a schematic structural view of a shell in a hub according to an embodiment of the present invention;

FIG. 4 is a cross-sectional schematic view of the shell in the hub according to an embodiment of the present invention;

FIG. 5 is a schematic structural view of an output shaft in a hub according to an embodiment of the present invention; and

FIG. 6 is a cross-sectional schematic view of a hub according to an embodiment of the present invention.

Detailed Description

While the present invention will be fully described with reference to the accompanying drawings, which contain exemplary embodiments of the invention, it should be understood before this description that one of ordinary skill in the art can modify the disclosure described herein while obtaining the technical effects of the present invention. Therefore, it should be understood that the foregoing description is a broad disclosure of those skilled in the art, and is not intended to limit the exemplary embodiments of the invention described herein.

Furthermore, in the following detailed description, for purposes of explanation, numerous specific details are set forth in order to provide a thorough understanding of the embodiments of the disclosure. It may be evident, however, that one or more embodiments may be practiced without these specific details. In other instances, well-known structures and devices are shown in schematic form in order to simplify the drawing.

Herein, although the terms "first," "second," etc. may be used herein to describe various elements, these elements should not be limited by these terms. It will be understood that, although the terms first, second, etc. may be used herein to describe various elements, these elements should not be limited by these terms.

According to the general inventive concept of the present invention, there is provided a hub for an aerial work platform, the hub comprising: a housing having a body with first and second opposing ports and a mounting flange integrally formed with the body, the mounting flange being integrally formed proximate the second port for mounting the housing to a carbody of the aerial work platform; and the output shaft is assembled in the assembling space, the output end of the output shaft extends out of the assembling space through the first port, and the output end of the output shaft is used for connecting wheels of the aerial work platform.

Fig. 1 and 2 respectively show a schematic structural view of a hub according to an embodiment of the invention; FIG. 3 shows a schematic structural view of a shell in a hub according to an embodiment of the present invention; FIG. 4 shows a schematic cross-sectional view of a shell in a hub according to an embodiment of the invention; FIG. 5 shows a schematic structural view of an output shaft in a hub according to an embodiment of the present invention; and FIG. 6 shows a cross-sectional schematic view of a hub, particularly the assembled relationship between the various components/parts, according to an embodiment of the present invention.

As shown in fig. 1 to 6, an embodiment of the present invention provides a hub for an aerial work platform (not shown), which mainly includes: a housing 1 and an output shaft 2. The housing 1 has a body 10 and a mounting flange 3 formed integrally with the body 10, the body 10 having opposite first and second ports 11 and 12, and a fitting space 13 communicating the first and second ports 11 and 12. A mounting flange 3 is integrally formed adjacent the second port 12 for mounting the housing 1 to the body of the aerial work platform. The output shaft 2 is fitted into the fitting space 13, more specifically, the bearing end 22 of the output shaft 2 is fitted into the fitting space 13, while the output end 21 of the output shaft 2 extends out of the fitting space 13 via the first port 11, the output end 21 of the output shaft 2 being used for connecting wheels of the aerial work platform. According to the hub for the aerial work platform, the shell and the rear cover in the prior art are formed into an integral part, so that the shell 1 and the mounting flange 3 are integrally formed, the rear cover and the mounting fastener in the prior art are omitted, the number of mounting parts is reduced, and the mounting cost is reduced.

According to an embodiment of the present invention, as shown in fig. 3 and 4, the body 10 further has an inner surface 14 facing the fitting space 13 and an outer surface 15 facing away from the fitting space 13. The inner surface 14 is formed with a boss 16 facing the fitting space 13. As shown in fig. 6, the hub further includes a first bearing 4 and a second bearing 5 for fitting the output shaft 2 into the fitting space 13 of the body 10.

In the illustrated exemplary embodiment, the body 10 has a substantially hollow cylindrical shape, the inner surface 14 of the body 10 is an inner side surface of the cylindrical shape having different diameters, and the outer surface 15 of the body 10 is an outer side surface of the cylindrical shape, which may be a flat cylindrical surface. The inner surface 14 of the hollow cylindrical body 10 is formed with an annular boss 16 facing the fitting space 13. Thus, the side of the boss 16 adjacent to the first port 11 forms a first axial positioning plane 161 for positioning the first bearing 4, and the side of the boss 16 adjacent to the second port 12 forms a second axial positioning plane 162 for positioning the second bearing 5.

In the exemplary embodiment, first bearing 4 and second bearing 5 are tapered roller bearings. Specifically, the fitting space 13 further includes a first bearing hole 131 for fitting the first bearing 4 and a second bearing hole 132 for fitting the second bearing 5, the first bearing hole 131 and the second bearing hole 132 being located on both sides of the boss 16, respectively. The output shaft 2 is fitted into the fitting space 13 of the body 10 through the first bearing 4 fitted in the first bearing hole 131 and the second bearing 5 fitted in the second bearing hole 132. The first bearing 4 is placed in the first bearing hole 131 and positioned by abutting against the first axial positioning plane 161, and the second bearing 5 is placed in the second bearing hole 132 and positioned by abutting against the second axial positioning plane 162. The fitting relationship between the first and second axial positioning planes 161 and 162 of the boss 16 and the first and second bearings 4 and 5 connected to the output shaft 2 will be described in detail below with reference to fig. 4 and 6.

According to an embodiment of the invention, as shown in fig. 1 to 4, the mounting flange 3 is integrally formed to the housing 1. Specifically, a mounting flange 3 is formed extending radially outwardly from the outer surface 15 of the body 10, the mounting flange 3 having a plurality of mounting holes 31 spaced from one another for coupling the hub to the aerial work platform carbody by engagement thereof with fasteners.

In the exemplary embodiment shown in fig. 1 to 4, a groove structure 32 formed by being recessed toward the outer surface 15 of the body 10 is formed between at least two adjacent mounting holes 31 among the plurality of mounting holes 31. More specifically, as shown in fig. 1 to 4, the mounting flange 3 has four mounting holes 31 spaced apart from each other, and a groove structure 32 formed by recessing toward the outer surface 15 of the body 10 is formed between every two adjacent mounting holes 31, and the groove structure 32 is an arc-shaped groove structure. With the above configuration, the weight of the case can be reduced and the cost can be reduced. Of course, in other embodiments, only a portion of the recess structure 32 may be formed between adjacent mounting holes 31. Alternatively still, in other embodiments, these groove structures 32 may not be provided.

According to an embodiment of the invention, as shown in fig. 1 to 4, the housing 1 further has a male end 17, and the male end 17 is formed between the mounting flange 3 and the second port 12 and formed by a surface of the mounting flange 3 facing the second port 12 side and the cylindrical outer surface 15 of the body 10 facing the second port 12 side for mounting and positioning of the entire hub. In the cross-sectional view shown in fig. 4, the male end 17 may have a substantially L-shape.

According to an embodiment of the present invention, as shown in fig. 1 to 2 and 5, the output shaft 2 has an output end 21 and a support end 22, the output end 21 and the support end 22 are separated by an annular protrusion 23, the annular protrusion 23 is also used for positioning the first bearing 4 and the second bearing 5 (see fig. 6), and the assembly relationship between the annular protrusion 23 and the first bearing 4 and the second bearing 5 connected to the output shaft 2 will be described in detail below with reference to fig. 4 and 6. The output shaft end 21 is also formed with a shaft seal through bore mating surface 27 adjacent the annular projection 23. A keyway 24 is formed in the output shaft 2 on the shaft surface at the output end 21 for accommodating the mounting of the external flange by means of a flat key 240. The end of the output shaft output end 21 is formed with hub lock threads 25 and/or hub lock pin holes 26 for threaded engagement with a lock nut 250, while the end of the output shaft support end 22 is formed with bushing lock threads 28 and thrust washer grooves 29 for threaded engagement with a round nut.

According to an embodiment of the invention, as shown in fig. 6, the hub further comprises: a shaft seal 6 and a cover 7. The shaft seal 6 is fitted to the first port 11 of the housing 1 to seal a space between the body 10 and the output shaft 2, and the shaft seal 6 is formed with a through hole 61 adapted to pass the output end 21 of the output shaft 2 therethrough. The closure 7 is formed from a thin plate and is press-fitted to the second port 12 of the body 10. An annular projection 23 is located within the body 10 and is spaced from the shaft seal 6. The radial dimension of the first port 11 and the radial dimension of the second port 12 are both larger than the radial dimension of the fitting space 13, and the radial dimension of the second port 12 may be equal to, larger than, or smaller than the radial dimension of the first port 11. In an exemplary embodiment where the housing is in the shape of a hollow cylinder, the radial dimension described herein may be the inner diameter of the hollow cylinder. In more detail, the shaft seal 6 is sealingly interference-fitted to the first port 11 of the body 10, and the shaft seal 6 is formed with a through hole 61 adapted for the output end 21 of the output shaft 2 to pass therethrough. The closure 7 is sealingly interference fitted to the second port 12 of the body 10.

According to an embodiment of the present invention, as shown in fig. 4 and 6, the first bearing 4 and the second bearing 5 are tapered roller bearings, and are mounted back-to-back. The support end 22 of the output shaft 2 is supported in the fitting space 13 of the body 10 by the first bearing 4 and the second bearing 5, while the output end 21 of the output shaft 2 extends out of the fitting space 13 via the through hole 61 of the shaft seal 6. Specifically, the first bearing 4 is located in the first bearing hole 131 of the fitting space 13, one of two opposite side surfaces of the first bearing 4 abuts against the first axial positioning plane 161 of the boss 16, and the other of two opposite side surfaces of the first bearing 4 abuts against the annular protrusion 23 of the output shaft 2, thereby securely locating the first bearing 4 in the first bearing hole 131 of the fitting space 13. A gap is maintained between the annular projection 23 of the output shaft 2 and the shaft seal 6 fitted at the first port 11 of the housing 1. The second bearing 5 and the first bearing 4 are spaced apart from each other by the boss 16, one of two opposite side surfaces of the second bearing 5 abuts against the second axial positioning plane 162 of the boss 16, and the other of the two opposite side surfaces of the second bearing 5 is locked by a fastener at the end of the support end 22 of the output shaft 2, thereby tightly positioning the second bearing 5 in the second bearing hole 132 of the fitting space 13. More specifically, by the stop washer 8 and the round nut 9 engaging with the threads of the bush locking thread 28 at the end of the support end 22 of the output shaft 2, the second bearing 5 is pressed against the second axial positioning plane 162 of the boss 16, whereby the second bearing 5 is securely positioned in the second bearing hole 132 of the fitting space 13 and thus the output shaft 2 is axially positioned with respect to the housing 1. According to the hub for the aerial work platform, provided by the embodiment of the invention, through the back-to-back mounting design of the first bearing 4 and the second bearing 5, the bosses are designed on the inner surface of the shell to realize the axial positioning of the first bearing and the second bearing, so that the first bearing and the second bearing can bear larger radial load.

Meanwhile, the invention also provides an aerial work platform which comprises the hub in any one of the embodiments.

Therefore, according to the wheel hub for the aerial work platform and the aerial work platform comprising the wheel hub, the shell and the rear cover of the wheel hub in the prior art are formed into an integral shell component, the rear cover and the assembling fastener in the prior art are omitted, the number of assembling components is reduced, and the assembling cost is reduced. In addition, according to the hub for the aerial work platform and the aerial work platform comprising the hub, which are provided by the embodiment of the invention, the groove structure is formed on the mounting flange of the hub, so that the weight of the shell is reduced, and the manufacturing cost is reduced. In addition, the hub for the aerial work platform and the aerial work platform comprising the hub provided by the embodiment of the invention have the advantages that the bosses are designed on the inner surface of the hub shell to realize the axial positioning of the first bearing and the second bearing, so that the first bearing and the second bearing can bear larger radial and axial loads. The hub is simple in overall structure, low in cost and reliable in function.

Having described the above exemplary embodiments of the invention in detail, it will be apparent to those skilled in the art that various changes and modifications may be made without departing from the scope and spirit of the appended claims, and that the invention is not limited to the embodiments of the exemplary embodiments set forth in the description.