WO2012071885A1

WO2012071885A1 - Engineering vehicle and chassis thereof

Info

Publication number: WO2012071885A1
Application number: PCT/CN2011/076291
Authority: WO
Inventors: 王尤毅; 陈先; 赵玉坤
Original assignee: 湖南三一智能控制设备有限公司; 三一重工股份有限公司
Priority date: 2010-12-02
Filing date: 2011-06-24
Publication date: 2012-06-07
Also published as: CN201872798U

Abstract

A chassis of an engineering vehicle comprises at least two axles (13) and a girder (11) connected to all axles (13). The girder (11) comprises a first girder part (111) and a second girder part (112) connected to the first girder part (111), and a connecting opening between them is located between two axles (13). The chassis also comprises a telescopic device (12) operated along the direction of the length of the vehicle body. Two ends of the telescopic device (12) are separately connected to the first girder part (111) and the second girder part (112), which is slidably connected to the first girder part (111). The chassis has structure of adjusting the wheelbase between the axles (13), which solves the problem of axles (13) overload resulted from uneven load distribution, balances the load distribution of all axles (13), and achieves optimum transporting status of the vehicle. An engineering vehicle comprises the aforesaid chassis.

Description

The present application claims the priority of the Chinese Patent Application entitled "Engineering Vehicles and Their Chassis" by the Chinese Patent Office, Application No. 201020639316.2, filed on Dec. 2, 2010, the entire contents of In this application. Technical field

The present invention relates to the technical field of engineering vehicles, and in particular to a chassis for an engineering vehicle. Furthermore, the invention relates to an engineering vehicle comprising the above-described chassis. Scenery technology

Construction vehicles are a kind of construction machinery with relatively large load capacity. With the continuous development of infrastructure construction, the application of construction vehicles is becoming more and more extensive.

Please refer to FIG. 1. FIG. 1 is a schematic structural view of a chassis of a typical construction vehicle in the prior art.

As shown in FIG. 1, the chassis of a typical engineering vehicle in the prior art includes an axle 1 connecting a corresponding wheel on both sides, a transfer case 3, a transmission shaft 2 connecting the transfer case 3, and a girders separating the two sides of the chassis. 4; Because the engineering vehicle has a relatively large bearing capacity, generally there are more than two axles 1 , the girders 4 are connected to the axles 1 , the two jointly support the vehicle body , and the transmission shaft 2 connects the power plant of the engineering vehicle with the axle 1 or the adjacent connection The two axles 1 transmit the driving force required for each axle 1 to work.

The length of the girders 4 of the prior art engineering vehicles is fixed, that is, the distance between the axles 1 is constant, so when the load of the engineering vehicle load is unevenly distributed, the axles of the axles 1 are received. The load is also different. The axle load of the axle 1 near the center of gravity of the load is relatively large, and the axle load of the axle 1 far from the center of gravity of the load is relatively small. The uneven distribution of the load is prone to a situation: When the axle is overloaded, the axle 1 with a relatively small load has a relatively large load-bearing margin, which affects the overall load capacity of the construction vehicle.

The uneven distribution of the local load of the engineering vehicle not only affects the smooth running of the vehicle, but also fails to make the vehicle reach the optimal transportation state, and the road surface to which it is driven is relatively destructive, and cannot meet the requirements of highway regulations; and due to the operational characteristics of the construction vehicle, not only The vehicle is required to have good driving performance on a straight road surface, and it is also required to be able to drive normally under off-road conditions. As we all know, the road conditions of off-road conditions are relatively poor, and the vehicle is bumpy, which adds to the overload of the axle 1. Burden, it is easy to break.

Therefore, how to improve the structure of the chassis, solve the problem of excessive overload caused by excessive axle load, balance the load distribution of each axle, extend the service life of the axle, and make the vehicle reach the optimal transportation state, which is currently known to those skilled in the art. Technical problems to be solved.

Summary of the invention

The invention provides a chassis, which has a structure for adjusting the wheelbase between axles, solves the problem that the axle is overloaded due to uneven load distribution, balances the load distribution of each axle, and prolongs the service life of the axle. And make the vehicle in optimal transport.

The present invention also provides an engineering vehicle including the above chassis.

The chassis of the construction vehicle provided by the present invention comprises at least two axles and a girders connected to the axles, the girders comprising a first girders and a second girders connected to the first girders, and a connection interface between the two is located between the two axles; the chassis further includes a telescopic device that moves along a longitudinal direction of the vehicle body, and the two ends of the telescopic device are respectively connected to the first beam portion and the second beam The second girders are slidably coupled to the first girders.

Preferably, a chute is disposed inside the first girders, and one end of the second girders is nested inside the chute.

Preferably, the expansion and contraction device is a telescopic cylinder, and a fixing portion of the telescopic cylinder is connected to the first girders, and an expansion and contraction portion is connected to the second girders.

Preferably, the fixing portion is connected to the first girders by a hinge seat, and the telescopic portion is connected to the second girders by a hinge seat.

Preferably, an outer wall of a portion of the second girders that is nested in the first girders is in contact with an inner wall of the chute.

Preferably, the drive shaft of the chassis includes a first shaft and a second shaft nested inside the first shaft, the second shaft sliding with the first shaft.

Preferably, the second shaft is an external spline, and the first shaft is an internal spline that cooperates with the external spline.

The construction vehicle provided by the present invention comprises a chassis and a vehicle body connected to the chassis, the chassis being the chassis according to any one of the above. The chassis of the construction vehicle provided by the present invention comprises at least two axles and a girders connected to the axles, the girders comprising a first girders and a second girders connected to the first girders, and a connection interface between the two is located between the two axles; the chassis further includes a telescopic device that moves along a longitudinal direction of the vehicle body, and the two ends of the telescopic device are respectively connected to the first beam portion and the second beam The second girders are slidably coupled to the first girders.

When the load of the construction vehicle is uneven, the axle bearing the relatively large axial load can be obtained by the experience of the staff or the numerical calculation method, and then the telescopic device near the axle bearing the axial load is operated to be telescoped. Pushing the axle away from the center of gravity of the load, thereby reducing the axial load on the axle, and the specific value of the expansion and contraction of the telescopic device can also be obtained by calculation and verification.

The girders of the construction vehicles are designed to be telescopic along the length of the vehicle body, so that the axial load on some axles can be adjusted, which is beneficial to balance the axial forces of the axles and avoid the breakage of some axles due to overweight. The vehicle can be optimally transported to meet road regulations.

DRAWINGS

1 is a schematic structural view of a chassis of a typical construction vehicle in the prior art; FIG. 2 is a schematic structural view of a specific embodiment of a chassis of an engineering vehicle according to the present invention;

Figure 3 is a front elevational view of the chassis of the construction vehicle shown in Figure 2;

Figure 4 is a schematic view showing a specific connection manner of the girders of the chassis shown in Figure 2;

Fig. 5 is a structural schematic view showing a specific embodiment of a drive shaft of a chassis of an engineering vehicle according to the present invention.

detailed description

The core of the present invention is to provide a chassis having a structure for adjusting the wheelbase between the axles, solving the problem of overloading of the axle due to uneven load distribution, balancing the load distribution of each axle, thereby extending the axle. The service life and the best transport of the vehicle. Additionally, another core of the present invention is directed to providing an engineering vehicle including the above-described chassis.

In order to make those skilled in the art better understand the technical solutions of the present invention, the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments. Please refer to FIG. 2, FIG. 3 and FIG. 4. FIG. 2 is a schematic structural view of a chassis according to a specific embodiment of the present invention; FIG. 3 is a front view of the chassis of the vehicle shown in FIG. 2; A schematic diagram of a specific connection of the girders of the chassis.

The chassis of the construction vehicle is the support of the whole vehicle, including at least two axles 13 and girders 11. The greater the load capacity of the general engineering vehicle, the more axles 13 are required, and the axles 13 are placed thereon. The girders 11 are connected, and the general girders 11 are made of a specific steel and may have a shape of a groove.

In a specific embodiment, the girders 11 include a first girders 111 and a second girders 112 nested with the first girders 111. The second girders 112 and the first girders 111 may both be grooved structures. The former can be nested inside the latter, and the connection interface between the two is located between the axles 13.

The chassis is further provided with a telescopic device 12 that moves along the longitudinal direction of the vehicle body. The two ends of the telescopic device 12 are respectively connected to the first beam portion 111 and the second beam portion 112, and the second beam portion 112 is opposite to the first beam by the expansion device 12. The portion 111 slides relative to the longitudinal direction of the body of the engineering vehicle.

In summary, the above-mentioned structure can realize that the axle distance between the axles of the chassis can be adjusted. When the load of the engineering vehicle is uneven, the axle bearing the axial load can be obtained by the experience of the staff or the numerical calculation method. 13, then operating the telescopic device 12 near the axle 13 with a large axial load to expand and contract, pushing the axle 13 away from the center of gravity of the load, thereby reducing the axial load on the axle 13, and the expansion device 12 is elongated The specific value can also be obtained by calculation and verification.

The girders 11 of the construction vehicle are designed to be telescopic along the length of the vehicle body, so that the axial load on the partial axles 13 can be adjusted, which is advantageous for balancing the axial forces of the axles 13 and avoiding the partial axles 13 being overweight. Breaking, it also allows the vehicle to reach optimal transport conditions and meet road regulations.

It should be noted that the solution of the present invention is illustrated by taking the two sections of the girders 11 of the engineering vehicle (the first girders 111 and the second girders 112) as an example. It should be understood that the girders 11 include, but are not limited to, two sections, and may further include more sections as long as the technical effects of the present invention are satisfied.

Further, a chute may be disposed inside the first girders 111, and the second girders 112 are nested in the chutes. The chute structure is single, and the first large beam portion 111 and the second large beam portion 112 are directly connected, and the guiding property is better, and the movement of the two is reliable.

Specifically, the expansion and contraction device 12 may be a telescopic cylinder, and a fixing portion of the telescopic cylinder is connected to the first large beam portion 111, and the expansion and contraction portion is connected to the second beam portion 112. It is apparent that the fixing portion of the telescopic cylinder is connected to the second girders 112, and the expansion and contraction portion is also connected to the first girders 111.

The telescopic cylinder driven by the hydraulic oil circuit has no rotating friction parts, each component has a long service life, and the structure is simple, easy to operate, and the hydraulic operation is smooth.

The hydraulic oil source that drives the oil circuit can come from the power source of the hydraulic control system of the construction vehicle. This solution does not require an additional oil source, the structure is simple, and the cost is low.

Specifically, the telescopic oil rainbow can be respectively connected to the first beam portion 111 and the second beam portion 112 through the hinge seat, and the hinge seats connected to the first beam portion 111 and the second beam portion 112 can be respectively disposed on the first beam The inner wall of the portion 111 and the inner wall of the second beam portion 112. The hinged seat connection is more convenient and easy to remove.

The connection of the hinge seat to the first beam portion 111 and the second beam portion 112 may be a direct connection, or may be indirectly connected to the first beam portion 111 and the second beam portion 112 by other means, as long as the work of the telescopic cylinder is not affected. Just fine.

Further, an outer wall of a portion of the second large beam portion 112 nested in the first gird portion 111 is fitted to an inner wall of the sliding groove.

The inner wall of the groove bottom of the first large beam portion 111 is fitted to the outer wall of the groove bottom of the second large beam portion 112 to facilitate the installation and positioning of the two large beam portions, and the fitting of the two side walls of the two large beam portions enhances the strength of the connecting portion.

It should be noted that the relative movement of the second large beam portion 112 and the first large beam portion 111 can be disposed inside the first large beam portion 111 through one end of the second large beam portion 112 to guide the relative sliding of the two. The first girders 111 and the second girders 112 are respectively connected to the two ends of the third member, and the second girders 112 and the first girders 111 are realized by the guiding and supporting of the third members. Relative sliding.

The drive axle 14 is also mounted on the chassis of the construction vehicle. The transmission shaft 14 functions to transmit power. It can be transmitted between the two axles 13 of different axles, even between the two axles 13 whose relative positions are constantly changing during operation. power.

Please refer to FIG. 5. FIG. 5 is a schematic diagram of a drive shaft of a chassis of a construction vehicle according to the present invention. A schematic structural view of a specific embodiment.

In a specific embodiment, the drive shaft 14 can include a first shaft 141 and a second shaft 142 nested inside the first shaft 141 such that the second shaft 142 slides inside the first shaft 141 along the length of the beam 11. One end of the first shaft 141 can be connected to the power source, and one end of the second shaft 142 can be connected to the axle 13.

When a certain axle 13 of the construction vehicle is relatively loaded, that is, the axle 13 is relatively close to the center of gravity of the load, the telescopic device 12 that controls the movement of the axle 13 is operated to extend, and the first beam portion 111 and the second portion The girders 112 are relatively far apart, and the two portions of the transmission shaft 14 that connect the respective axles 13 also slide relative to each other to achieve adjustment of the pitch of the axles 13.

The structure in which the second shaft 142 is nested inside the first shaft 141 can easily realize the structure without affecting the transmission power of the transmission shaft 14, and the guiding property of the two shafts is relatively good, and the relative sliding is relatively stable.

The longitudinal direction of the girders refers to the longitudinal direction of the vehicle body.

Specifically, the second shaft 142 can be connected to the first shaft 141 by a key connection, the second shaft 142 can be provided with an external spline, and the first shaft 141 can be provided with an internal spline that cooperates with the second shaft 142. The specific number of keyways can be set according to the specific situation.

The spline fit bearing capacity is relatively strong, the transmitted torque is also relatively large, and the concentricity and guiding of both are relatively good, which is beneficial to the stable sliding of the two parts of the transmission shaft 14.

The embodiments herein are convenient for description, and are easy to understand. The description is made on the premise that the telescopic device 12 is in the shortest amount of expansion and contraction when the automobile is in the non-load state, and it is obvious that other telescopic devices 12 capable of realizing the beneficial effects of the present invention are designed. It is also within the scope of this article.

The telescopic device 12 in the above embodiment is not limited to the telescopic cylinder, and a motor-chain transmission can also be used, which has a large load carrying capacity.

In addition to the above-described chassis, the present invention also provides an engineering vehicle including the above-described chassis. Since the above-described chassis has the above-described technical effects, the construction vehicle having the above-described chassis should also have a corresponding technical effect. Please refer to the prior art for the structure of other parts of the above engineering vehicles, and will not be repeated here.

The engineering vehicle and its chassis provided by the present invention are described in detail above. This document should only be used to help understand the method of the present invention and its core idea. It should be noted that for this technology It will be apparent to those skilled in the art that the present invention may be modified and modified without departing from the spirit and scope of the invention.

Claims

A chassis for an engineering vehicle comprising at least two axles (13) and a girders (11) connected to each of the axles (13), characterized in that the girders (11) comprise a first girders And a second girders portion (112) connected to the first girders portion (111), and a connection interface between the first girders portion and the second girders portion is located at two of the axles (13) The chassis further includes a telescopic device (12) that moves along a length direction of the vehicle body of the engineering vehicle, and both ends of the telescopic device (12) are respectively associated with the first weight beam portion (111) and the The second large beam portion (112) is connected, and the second large beam portion (112) is slidably coupled to the first large beam portion (111).

2. The chassis of a construction vehicle according to claim 1, wherein said first girders

8

A chute is disposed inside the portion (111), and one end of the second beam portion (112) is nested inside the chute. begging

The chassis of the construction vehicle according to claim 2, wherein the telescopic device (12) is a telescopic cylinder, and a fixing portion of the telescopic cylinder is connected to the first beam portion (111), and the telescopic device thereof The portion is connected to the second beam portion (112).

4. The chassis of a construction vehicle according to claim 3, wherein the fixing portion is coupled to the first girders (111) by a hinged seat, and the telescopic portion passes through the hinged seat and the first The two large beams (112) are connected.

The chassis of the construction vehicle according to claim 4, wherein the second girders (112) are nested in an outer wall of a portion of the first girders (111) and an inner wall of the chute Fit together.

The chassis of a construction vehicle according to any one of claims 1 to 5, characterized in that the transmission shaft (14) comprises a first shaft (141) and is nested inside the first shaft (141) a second shaft (142), the second shaft (142) being slidably coupled to the first shaft (141).

7. The chassis of a construction vehicle according to claim 6, wherein said second shaft

(142) is an external spline, and the first shaft (141) is an internal spline that cooperates with the external spline.

An engineering vehicle comprising a chassis and a vehicle body coupled to the chassis, wherein the chassis is the chassis according to any one of claims 1 to 7.