阅读说明：本技术 一种混合动力自卸车的自适应稳定接触取电装置 (Self-adaptive stable contact power taking device of hybrid power dump truck ) 是由 刘景霞 张富全 赵瑛 王青春 李成成 李成员 王国伟 崔涛 张腾 于 2021-08-18 设计创作，主要内容包括：本发明公开了一种混合动力自卸车的自适应稳定接触取电装置,包括底架,升降装置,下臂,下导杆,上臂,上导杆,自适应弓头；其中在底架上铰接有下臂,下臂的一端连接有升降装置,升降装置驱动下臂以铰接点旋转,在下臂的另一端与上臂的一端铰接；自适应弓头包括与上臂连接的横板,在横板的两侧设有滑轨,在滑轨上方设有顶梁,顶梁通过铰接杆与滑轨铰接,顶梁、铰接杆与滑轨共同组成一个等腰梯形结构；在顶梁和滑轨之间设有弹性部件,顶梁下移使弹性部件产生弹性形变；在顶梁上向下延伸的设有限位杆；其对取电弓进行了结构升级,使其具有一定的缓冲能力,通过缓冲来提升取电弓与电网稳定接触,从而解决上述问题。(The invention discloses a self-adaptive stable contact electricity taking device of a hybrid power dump truck, which comprises a chassis, a lifting device, a lower arm, a lower guide rod, an upper arm, an upper guide rod and a self-adaptive bow head, wherein the chassis is provided with a lifting device; wherein, a lower arm is hinged on the underframe, one end of the lower arm is connected with a lifting device, the lifting device drives the lower arm to rotate by a hinged point, and the other end of the lower arm is hinged with one end of the upper arm; the self-adaptive bow comprises a transverse plate connected with an upper arm, slide rails are arranged on two sides of the transverse plate, a top beam is arranged above the slide rails and is hinged with the slide rails through a hinge rod, and the top beam, the hinge rod and the slide rails form an isosceles trapezoid structure; an elastic component is arranged between the top beam and the slide rail, and the top beam moves downwards to enable the elastic component to generate elastic deformation; a limiting rod is arranged on the top beam in a downward extending manner; the structure of the power-taking bow is upgraded, so that the power-taking bow has certain buffering capacity, and the stable contact between the power-taking bow and a power grid is improved through buffering, so that the problems are solved.)

1. A self-adaptive stable contact electricity taking device of a hybrid power dump truck comprises a bottom frame, a lifting device, a lower arm, a lower guide rod, an upper arm, an upper guide rod and a self-adaptive bow head; wherein, a lower arm is hinged on the underframe, one end of the lower arm is connected with a lifting device, the lifting device drives the lower arm to rotate by a hinged point, and the other end of the lower arm is hinged with one end of the upper arm; a lower guide rod is connected between the lower arm and the base, and upper guide rods are connected at two ends of the upper arm to form an electricity taking lifting frame; on the basis, the other end of the upper arm is provided with a self-adaptive bow; the method is characterized in that:

the self-adaptive bow comprises a transverse plate connected with an upper arm, slide rails are arranged on two sides of the transverse plate, a top beam is arranged above the slide rails and is hinged with the slide rails through a hinge rod, and the top beam, the hinge rod and the slide rails form an isosceles trapezoid structure; an elastic component is arranged between the top beam and the slide rail, and the top beam moves downwards to enable the elastic component to generate elastic deformation; a limiting rod is arranged on the top beam in a downward extending manner, and the limiting rod can slidably penetrate through a limiting block connected with the transverse plate; the top beam is provided with a power-taking bow.

2. The self-adaptive stable contact power taking device of the hybrid power dump truck according to claim 1, characterized in that: the cross section of the sliding rail is of a T-shaped structure, a limiting piece is arranged on a bulge at the outer end of the sliding rail, the limiting piece is transversely arranged on the bulge of the sliding rail, the upper surface of the limiting piece is flush with the bulge of the sliding rail, and a hollow state is formed between the lower surface of the limiting piece and the precious bottom of the sliding rail and used for dust exhaust; the other end of the slide rail is provided with a gap for dust exhaust at the rail bottom.

3. The self-adaptive stable contact power taking device of the hybrid power dump truck according to claim 2, characterized in that: the slide rails are divided into two groups, and the middle parts of the slide rails are separated by a restraint platform for installing an elastic component.

4. The self-adaptive stable contact power taking device of the hybrid power dump truck according to claim 1, characterized in that: one end of the hinged rod is hinged with the lower surface of the top beam, the other end of the hinged rod is hinged with a sliding block, a notch matched with the sliding rail is arranged on the lower surface of the sliding block, and the sliding rail is installed on the sliding rail and slides along the sliding rail.

5. The self-adaptive stable contact power taking device of the hybrid power dump truck according to claim 1, characterized in that: the elastic component is a spring, the upper end of the spring is arranged on the ejector rod in an overhead mode, and the lower end of the spring is arranged on the restraint block in an overhead mode.

6. The self-adaptive stable contact power taking device of the hybrid power dump truck according to claim 1, characterized in that: a baffle plate is arranged at the lower end of the limiting rod in a position-adjustable manner.

7. The self-adaptive stable contact power taking device of the hybrid power dump truck according to claim 1, characterized in that: the restraint block is divided into an upper layer and a lower layer, a first through hole for the limiting rod to pass through is formed in the upper layer, a second through hole is formed in the lower layer, and the aperture of the first through hole is 4-8mm larger than the diameter of the limiting rod; the second through hole is assembled with the limiting rod in a clearance fit manner; the advancing direction of the power-taking bow between the upper layer and the lower layer is set to be an open structure, and the opposite end of the opening is set to be an inclined closing-up structure.

Technical Field

The application relates to a get electric bow structure, more specifically say so, relate to a self-adaptation of hybrid dump truck is stabilized and is contacted electric installation.

Background

The dump truck is a vehicle which can unload cargos by hydraulic or mechanical lifting; also known as dump trucks. The hydraulic lifting device consists of an automobile chassis, a hydraulic lifting mechanism, a cargo compartment, a power take-off device and the like. The dumper has a very wide and mature application system in actual production, and is widely used in the aspects of buildings and mines.

In the field of mining dump trucks, the current power system mainly adopts three modes of internal combustion engine driving, electric driving and hybrid power, and as the reduction of carbon emission is advocated in China in recent years, the mining dump trucks have very high power and considerable emission, so that in recent years, the driving modes of electric driving and oil-electric hybrid driving are gradually developed, no matter the mining dump trucks are driven by hybrid power or pure power, when the mining dump trucks are powered on, power-taking bows mounted on the roofs of the mining dump trucks are required to be used for power collection of the dump trucks, and the specific implementation scheme is that power grids are erected on two sides of a road of a mine plant, the power-taking bows are mounted on the roofs of the dump trucks, and the dump trucks are powered through lifting and taking power.

However, in practical implementation, the mine road is not as flat as a rail train, the road surface jolts, and in the electricity taking process, when a jolt road section is encountered (in fact, frequent encounter), the contact force between the electricity taking pantograph and the power grid is instantly increased or separated, and two problems are caused by the unstable contact. If the two parts are separated, the problem of virtual connection caused by unstable connection can be caused, so that the power system of the dump truck is insufficient and even burnt, and the problem causes the current pantograph and the instability thereof. If the method of constructing the asphalt road in the mine field is adopted to solve the problem, the method faces huge cost, and the mining dump truck has very large tonnage, so that the cost for paving the asphalt road is very expensive, the service life is short, and the actual consumption is too large.

Disclosure of Invention

In view of the above, the present invention is directed to a self-adaptive stable contact power-taking device for a hybrid dump truck, which upgrades the structure of a power-taking bow, so that the power-taking bow has a certain buffering capacity, and the stable contact between the power-taking bow and a power grid is improved by buffering, thereby solving the above problems.

In a first aspect, the application provides a self-adaptive stable contact power taking device of a hybrid power dump truck, which comprises an underframe, a lifting device, a lower arm, a lower guide rod, an upper arm, an upper guide rod and a self-adaptive bow head; wherein, a lower arm is hinged on the underframe, one end of the lower arm is connected with a lifting device, the lifting device drives the lower arm to rotate by a hinged point, and the other end of the lower arm is hinged with one end of the upper arm; a lower guide rod is connected between the lower arm and the base, and upper guide rods are connected at two ends of the upper arm to form an electricity taking lifting frame; on the basis, the other end of the upper arm is provided with a self-adaptive bow;

the self-adaptive bow comprises a transverse plate connected with an upper arm, slide rails are arranged on two sides of the transverse plate, a top beam is arranged above the slide rails and is hinged with the slide rails through a hinge rod, and the top beam, the hinge rod and the slide rails form an isosceles trapezoid structure; an elastic component is arranged between the top beam and the slide rail, and the top beam moves downwards to enable the elastic component to generate elastic deformation; a limiting rod is arranged on the top beam in a downward extending manner, and the limiting rod can slidably penetrate through a limiting block connected with the transverse plate; the top beam is provided with a power-taking bow.

When the sliding rail is specifically arranged, the section of the sliding rail is of a T-shaped structure, a limiting piece is arranged on a bulge at the outer end of the sliding rail, the limiting piece is transversely arranged on the bulge of the sliding rail, the upper surface of the limiting piece is flush with the bulge of the sliding rail, and a hollow state is formed between the lower surface of the limiting piece and the precious bottom of the sliding rail for dust exhaust; the other end of the slide rail is provided with a gap for dust exhaust at the rail bottom.

On the basis, when the slide rails are further arranged, the slide rails are divided into two groups, and the middle parts of the slide rails are separated by a restraint platform for installing an elastic part. The purpose of the restraint bench is to carry a stop bar.

When specifically using above-mentioned hinge bar, the one end of hinge bar is articulated with the lower surface of back timber, and the other end of hinge bar articulates there is the slider, is equipped with the notch with slide rail looks adaptation at the lower surface of slider, and the slide rail is installed on the slide rail to slide along the slide rail.

When the elastic component is arranged specifically, the elastic component is a spring, the upper end of the spring is arranged on the ejector rod in an overhead mode, and the lower end of the spring is arranged on the restraining block in an overhead mode.

When the limiting rod is arranged specifically, a blocking piece is arranged at the lower end of the limiting rod in a position-adjustable manner, and the elastic hardness of the top beam is adjusted through the blocking piece.

When the restraint block is specifically arranged, the restraint block is divided into an upper layer and a lower layer, a first through hole for the limiting rod to penetrate through is formed in the upper layer, a second through hole is formed in the lower layer, and the aperture of the first through hole is 4-8mm larger than the diameter of the limiting rod; the second through hole is assembled with the limiting rod in a clearance fit manner; the advancing direction of the power-taking bow between the upper layer and the lower layer is set to be an open structure, and the opposite end of the opening is set to be an inclined closing-up structure. The upper layer is used as a base surface for the top of the spring, and the lower layer is used for filtering dust adhered to the limiting rod, so that the dust can cause larger resistance when the limiting rod slides; and the lower floor effect both can retrain the position of gag lever post, and the clearance position department of upper strata and lower floor can be scraped to dust on the gag lever post that is again with clearance fit's mounting means, and this department also need clear up by the dust of scraping, and this application is through the structure of the about piece of setting up very much, and the amount of wind that produces when the utilization that makes its dust of scraping can be timely gos forward blows it off, has solved the gag lever post slip hindered problem that dust leads to.

The invention has the following beneficial effects:

firstly, the specially designed self-adaptive bow can ensure that the power-taking bow is stably connected with a power grid when the mining dump truck bumps on a travelling path, wherein the stable connection means that the mining dump truck cannot seriously extrude the power-taking bow and the power grid or separate the power-taking bow and the power grid by using the arrangement of a buffer mechanism when encountering a bumpy road section, the threshold value of the contact range of the power-taking bow and the power grid is technically enlarged, and the self-adaptive bow can be timely adjusted when encountering the bumpy road section; as is known, when a dump truck encounters a pothole or a raised road section, the dump truck jolts up and down, and when the dump truck jolts up, the power-taking bow and the power grid are forcibly extruded, so that the friction force is increased as a result of the forcible extrusion, and the abrasion of the power-taking bow and the power grid is increased due to the increased friction force, so that the service life of the dump truck is shortened; when the dump truck jolts downwards, the problem of separation of the power-taking bow and the power grid can occur, the separation can seriously affect the stability of power supply, and the consequence is that the power is sharply reduced or the circuit system of the dump truck is burnt, and the results are unacceptable. And stable connection, which is also the most important problem when the power grid receives power from the pantograph, is also the basic problem.

Secondly, the premise for maintaining the effectiveness of the technology of the application is as follows: the smoothness of the up-and-down elastic floating of the power-taking bow is a basic guarantee, and if the power-taking bow floats up and down, the technical effect of the application can be seriously attenuated if the power-taking bow is blocked or unsmooth. On a mine site, dust flies, and the working condition is very poor, so that the influence of the dust on the smoothness of the mechanical structure has to be considered in the smooth operation of the mechanical structure; in the actual working process, the dust is easily accumulated on the sliding rail and the limiting rod, and the two mechanisms are sliding mechanisms, so that the smoothness of the movement of the sliding rail and the limiting rod is seriously influenced by the accumulation of the dust, the up-and-down floating movement of the sliding rail is slowed down, and the floating effect of the sliding rail and the limiting rod can be directly reduced; therefore, the dust exhaust problem needs to be solved; on the dust exhaust problem to the slide rail, this application adopts the spacing piece that sets up very much in the outer end of slide rail, has solved the dust exhaust problem, discovery when the actual implementation, the slip of slider mainly can make dust gather at the rail top and the rail end of slide rail, to the rail top, the upper surface of this application stopper flushes with the rail top, the dust of gathering like this can be "pushed away" by the slide rail smoothly, to the rail end, also be the same reason and can avoid the accumulation of dust at the rail end, this is one of them. Secondly, the position of the limiting rod is restrained by the restraining block, so that the degree of freedom of the top beam in the horizontal direction is limited, however, the matching motion between the limiting rod and the restraining block is easy to accumulate, so that the power-taking bow floats upwards or descends smoothly; therefore, for the dust exhaust design of the position, in the application, the constraint block is designed into an upper layer and a lower layer, the upper layer is specially used for an overhead spring, the gap between the upper layer and the lower layer is specially used for timely cleaning dust around the limiting rod, the advancing direction end (equivalent to the air inlet of the gap) of the gap is processed into an open structure, and the tail end (equivalent to the air outlet of the gap) of the gap is processed into an inclined closing-in structure; the open air inlet enables a vehicle to enter more air quantity when moving, and the air outlet is of an inclined closing structure, so that the pressure and the speed of air flow entering the gap are increased in the gap, and dust on the limiting rod is blown away; the inclined closing-in structure ensures that the air is blown away from the device; secondly, because the air current velocity of flow in the clearance is fast, then the air current still can enter into the clearance from the first through-hole on the upper strata in, further strengthen the air current pressure in the clearance, realize in time, effectually blow away dust, this is the dust exhaust means to the gag lever post of this application; if dust is not discharged in time, the limiting rod can be blocked when floating up or floating down, so that the sliding action is slowed, and the actual effect is influenced.

Drawings

Fig. 1 is a schematic view of the adaptive bow of the present invention mounted on a power-taking stand.

Fig. 2 is a schematic diagram of an adaptive bow head structure according to the present invention.

Fig. 3 is a schematic view of the adaptive bow head downward floating according to the present invention.

FIG. 4 is a schematic view of the flow direction of the restraint blocks of the present invention (cross-sectional view, front view is a cross-sectional view).

Fig. 5 is a schematic perspective view (cross-sectional view, front side is a cross-sectional view) of a structure of a constraining block according to the present invention.

In the figure, an underframe 1, a lifting device 2, a lower arm 3, a lower guide rod 4, an upper arm 5, an upper guide rod 6, a transverse plate 8, a slide rail 9, a limiting sheet 9.1, a notch 9.2, a hinge rod 10, a slide block 10.1, a top beam 11, an elastic component 12, a restriction block 13, an upper layer 13.1, a lower layer 13.2, a gap 13.3, a blocking sheet 14, a limiting rod 15 and a power-taking bow 16 are arranged.

Detailed Description

In order to make the objects, technical solutions and advantages of the present application more clear, the present application will be further described in detail with reference to the accompanying drawings.

For convenience in understanding the adaptive stable contact power-taking device provided in the embodiment of the present application, an application scenario thereof is first described below.

The application provides a self-adaptive stable contact power taking device which is mainly applied to a trackless mining dump truck; the tramcar of the rail has flat rail surface, so that the train cannot generate a large-amplitude bumping state on the rail, and the problem does not exist; the mining dump truck is trackless, the road surface where the mining dump truck walks is also the road surface of a mine site, and the mine site does not have a road for paving asphalt, so that the road surface bumping is a necessary result, and if the mining dump truck can stably take electricity from a power grid, the stable contact between the electricity-taking bow 16 and the power grid needs to be ensured, so that the contact pressure between the electricity-taking bow 16 and the power grid is neither overlarge nor virtual connection is not allowed; and jolt the road surface and directly produce these two problems again, lead to getting bow 16 and electric wire netting contact unstable, based on this problem, this application has developed the stable contact of self-adaptation and has got the electric installation.

For clear understanding of the technical solutions of the present application, the following detailed description will be made on the chassis provided in the present application with reference to specific embodiments and accompanying drawings.

The terminology used in the following examples is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. As used in the specification of the present application and the appended claims, the singular forms "a", "an", "the" and "the" are intended to include the plural forms as well, such as "one or more", unless the context clearly indicates otherwise. It should also be understood that in the following embodiments of the present application, "at least one", "one or more" means one, two or more.

Reference throughout this specification to "one embodiment" or "some embodiments," or the like, means that a particular feature, structure, or characteristic described in connection with the embodiment is included in one or more embodiments of the present application. Thus, appearances of the phrases "one embodiment," "in some embodiments," "in other embodiments," or the like, in various places throughout this specification are not necessarily all referring to the same embodiment, but rather "one or more but not all embodiments" unless specifically stated otherwise. The terms "comprising," "including," "having," and variations thereof mean "including, but not limited to," unless expressly specified otherwise.

As shown in fig. 1, the application shows a schematic diagram of a self-adaptive bow head carried on a power taking frame, which mainly comprises an underframe 1, a lifting device 2, a lower arm 3, a lower guide rod 4, an upper arm 5, an upper guide rod 6 and the self-adaptive bow head; wherein, a lower arm 3 is hinged on the underframe 1, one end of the lower arm 3 is connected with a lifting device 2, the lifting device 2 drives the lower arm 3 to rotate by a hinged point, and the other end of the lower arm 3 is hinged with one end of an upper arm 5; and a lower guide rod 4 is connected between the lower arm 3 and the base, and upper guide rods 6 are connected at two ends of the upper arm 5 to form an electricity taking lifting frame, and the electricity taking lifting frame is lifted up and down to take out and cut off electricity through the lifting device 2 to form a lifting electricity taking frame. The lifting electricity taking frame is mature in structure technology and mainly applied to rail trains at present. On the basis, the self-adaptive bow head is additionally arranged at the free end of the upper arm 5, so that the self-adaptive bow head can be applied to trackless trolleys or hybrid vehicles, such as mining dump trucks.

As shown in fig. 2 and 3, the adaptive bow of the present application includes a transverse plate 8 connected to an upper arm 5, and T-shaped slide rails 9 are provided on both sides of the transverse plate 8, and the T-shaped slide rails 9 have minimum constraint on a slider 10.1 and can have no dead angle, so that the slide smoothness of the slide rails 9 is very excellent in other forms; a top beam 11 is arranged above the slide rail 9 and is parallel to the slide rail 9, and the top beam 11 is hinged with the slide rail 9 through two groups of hinge rods 10; the top beam 11, the hinge rod 10 and the slide rail 9 form an isosceles trapezoid structure, and the isosceles trapezoid structure is set to ensure that the top beam 11 is always in a horizontal state when moving downwards due to the same stress when the top beam 11 is pressed downwards, so that the electric pantograph 16 is stably contacted; an elastic component 12 is arranged between the top beam 11 and the slide rail 9, the top beam 11 moves downwards to enable the elastic component 12 to generate elastic deformation, the elastic component 12 can ensure that the top beam 11 can automatically bounce upwards when not stressed, and the bouncing speed is high and the delay is small; meanwhile, the buffer can play a role in buffering when the buffer is stressed; a limiting rod 15 is arranged on the top beam 11 in a downward extending manner, the limiting rod 15 can slidably penetrate through a limiting block 13 connected with the transverse plate 8, and the limiting rod 15 is used for further ensuring that the top beam 11 can continuously keep horizontal ascending or descending when stressed or unstressed; a current-drawing bow 16 is arranged on the top beam 11. When electricity is taken on the foundation structure, the ascending electricity-taking bow 16 is contacted with the power grid until the elastic part 12 is compressed by half, and under the holding of the structure, if the dump truck encounters a convex road section, the spring can be further compressed to reduce the impact of the electricity-taking bow 16 on the power grid and the extrusion force between the electricity-taking bow 16 and the power grid, so that the bidirectional abrasion is reduced; when the pantograph 16 moves downwards in a pothole road section, the contact between the pantograph 16 and the power grid can be ensured all the time due to the resilience of the elastic component 12, the connection cannot be interrupted suddenly, and the connection stability is greatly enhanced.

When the hinge rod 10 is used, one end of the hinge rod 10 is hinged to the lower surface of the top beam 11, the other end of the hinge rod 10 is hinged to a sliding block 10.1, a notch matched with the sliding rail 9 is formed in the lower surface of the sliding block 10.1, and the sliding rail 9 is installed on the sliding rail 9 and slides along the sliding rail 9.

As shown in fig. 3, as an example, the present application provides a premise of technical effect that the whole mechanism can operate smoothly, and dust is the biggest problem affecting smooth operation of the mechanism, especially in mining areas, where the field environment is extremely bad, and the problem of dust is a problem that must be solved, when the above-mentioned slide rail 9 is specifically provided, a limiting piece 9.1 is provided on the outer end protrusion of the T-slide rail 9, the limiting piece 9.1 is transversely provided on the protrusion of the slide rail 9, and the upper surface is flush with the protrusion of the slide rail 9, and the lower surface is hollow between the precious bottom of the slide rail 9 for dust removal, the limiting piece 9.1 not only achieves the limiting function, but also achieves the effect of 'no obstruction' dust removal, both dust on the slide rail 9 is easy to accumulate on the rail top and the rail bottom, dust accumulated on the rail top is because the upper surface of the limiting piece 9.1 is flush with the rail top, and dust is not accumulated and can be removed smoothly, and dust on the rail bottom, the dust can be smoothly discharged due to the hollow state; the other end of the slide rail 9 is provided with a gap 9.2 for dust exhaust at the rail bottom; and slider 10.1 is gliding around on slide rail 9, can produce the dust on the slide rail 9 of slider 10.1's both sides the same, consequently be the same problem that faces at the both ends of slider 10.1, consequently, need set up the dust exhaust mouth at the other end of slide rail 9, the dust exhaust of this application will be leaked by the dust that slider 10.1 pushed to opening 9.2 department through opening 9.2, just solved the laying dust problem, it is smooth and easy to ensure that the slip between slide rail 9 and the slider 10.1 is, can not take place the card problem owing to having gathered a large amount of dust.

As shown in fig. 2 and 3, in the present application, considering the installation of the limiting rod 15, when the limiting rod 15 is installed at the center of the top beam 11, the shearing force applied to the limiting block 13 during the sliding process is minimal, so that, on the basis of the above, when the sliding rails 9 are further provided, the sliding rails 9 are divided into two groups, and the middle parts are separated by the limiting table for installing the elastic component 12. The restraint platform is connected with the transverse plate 8, and can generate horizontal restraint on the limiting rod 15, so that the limiting rod 15 can only slide up and down, and the limiting rod 15 can slide up and down, so that the top beam 11 can horizontally slide up and down.

As shown in fig. 2, as one embodiment, when the elastic member 12 is specifically provided, the elastic member 12 is a spring, an upper end of the spring is placed on the top rod, and a lower end of the spring is placed on the restraint block 13.

As shown in fig. 2 and 3, as an embodiment, when the limiting rod 15 is specifically arranged, a blocking piece 14 is arranged at the lower end of the limiting rod 15 in an adjustable position, and the elastic hardness of the top beam 11 is adjusted by the blocking piece 14; the function of the blocking piece 14 is one of the functions, the other function is that the sliding rail 9 adopted by the application is the T-shaped sliding rail 9, so that the sliding rail and the sliding block 10.1 are not interlocked, the sliding rail and the sliding block can be separated, the design aims to reduce the limit of the sliding rail 9 on the sliding block 10.1, reduce the friction surfaces of the sliding block and the sliding block as much as possible and improve the smoothness of the sliding block and the sliding block, therefore, the function of connecting the top beam 11 and the transverse plate 8 is realized through the blocking piece 14, and the self-adaptive bow head can be ensured to be a whole.

As shown in fig. 3, 4, and 5, as an embodiment, not only dust is discharged from the slide rail 9, but also dust is discharged from the limiting rod 15, when in actual execution, the dust accumulation may cause the limiting rod 15 to slide on the constraining block 13, the speed is slow, which may cause the top beam 11 to slide up and down, the movement is slow, even the top beam is stuck in a certain state and cannot move, and manual cleaning is required, and because there is much dust in a mining area, manual cleaning is not practical at all; based on this, the solution of the method is real-time and continuous cleaning, so that excessive accumulation is avoided, and blockage is not easy to occur; therefore, when the restraint block 13 is specifically arranged, the restraint block 13 is divided into an upper layer 13.1 and a lower layer 13.2, the upper layer 13.1 is provided with a first through hole for the limiting rod 15 to pass through, the lower layer 13.2 is provided with a second through hole, and the aperture of the first through hole is 4-8mm larger than the diameter of the limiting rod 15; the second through hole is matched and assembled with the spacing 13.3 of the limiting rod 15; the advancing direction of the current-drawing bow 16 between the upper layer 13.1 and the lower layer 13.2 is set to be an open structure, and the opposite end of the open structure is set to be an oblique closing structure. The upper layer 13.1 is used as a base surface for the top of the spring, and the lower layer 13.2 is used for filtering out dust adhered to the limiting rod 15, so that the dust can cause larger resistance when the limiting rod 15 slides; the lower layer 13.2 can restrain the position of the limiting rod 15, and dust on the limiting rod 15 can be scraped to the position of the gap 13.3 between the upper layer 13.1 and the lower layer 13.2 in an assembly mode of matching the gap 13.3, and the scraped dust also needs to be cleaned; the problem that the limiting rod 15 caused by dust slides unhindered is solved. The specific principle is as follows: the end of the gap 13.3 formed by the upper layer 13.1 and the lower layer 13.2 in the advancing direction (equivalent to the air inlet of the gap 13.3) is processed into an open structure, and the tail end of the gap 13.3 (equivalent to the air outlet of the gap 13.3) is processed into an inclined closing structure; the open air inlet enables the vehicle to enter more air quantity when moving, the air outlet is of an inclined closing structure, so that the air flow entering the gap 13.3 can be pressurized and accelerated in the gap 13.3, namely compressed air is generated, and dust on the limiting rod 15 is blown away; the inclined closing-in structure ensures that the air is blown away from the device; the wind power generated when the dump truck advances is skillfully utilized, and the dump truck is pressurized and accelerated to blow away dust as much as possible; secondly, because the air current velocity of flow in clearance 13.3 is fast (for the outside, just pressure in clearance 13.3 is little, then the air current still can get into (or be called and is drawn in) to the clearance 13.3 from the first through-hole on upper strata 13.1, further strengthens the air current pressure in clearance 13.3, realizes in time, effectively blows away dust, this is this application to the dust exhaust means principle of gag lever post 15.

When the electric bow 16 is lifted from the electricity taking frame, the spring is compressed by half, so that the aim of buffering is fulfilled and the technical effect of stable connection is realized when the electric bow is in a bumpy road section during traveling.

The above description is only for the specific embodiments of the present application, but the scope of the present application is not limited thereto, and any person skilled in the art can easily conceive of the changes or substitutions within the technical scope of the present application, and shall be covered by the scope of the present application. Therefore, the protection scope of the present application shall be subject to the protection scope of the claims.