阅读说明：本技术 运输车 (Transport vehicle ) 是由 沈彩瑜 张玉宝 吴荣坤 郑和平 付勇 袁博 吴振国 于 2021-02-01 设计创作，主要内容包括：本发明提供了一种运输车,包括：凹底架,凹底架可转动地设置在运输车上,以用于装卸货物；过渡板组件,过渡板组件可移动地设置在凹底架上,过渡板组件具有工作位置和避让位置；其中,当过渡板组件位于工作位置时,过渡板组件伸出凹底架以将凹底架与地面进行连接；当过渡板组件位于避让位置时,过渡板组件回缩至凹底架内。本发明的运输车解决了现有技术中的驮背运输车不方便进行货车转移的问题。(The invention provides a transport vehicle, comprising: the concave underframe is rotatably arranged on the transport vehicle and used for loading and unloading goods; the transition plate assembly is movably arranged on the concave underframe and is provided with a working position and an avoiding position; when the transition plate assembly is located at the working position, the transition plate assembly extends out of the concave underframe to connect the concave underframe with the ground; when the transition plate assembly is located at the avoiding position, the transition plate assembly retracts into the concave underframe. The transport vehicle solves the problem that the piggyback transport vehicle in the prior art is inconvenient for transferring the freight cars.)

1. A transportation vehicle, comprising:

a concave chassis (10), the concave chassis (10) being rotatably provided on the transport vehicle for loading and unloading goods;

a transition plate assembly (20), the transition plate assembly (20) movably disposed on the female chassis (10), the transition plate assembly (20) having an operating position and an avoidance position;

wherein, when the transition plate assembly (20) is in the working position, the transition plate assembly (20) extends out of the recessed chassis (10) to connect the recessed chassis (10) with the ground; when the transition plate assembly (20) is in the avoidance position, the transition plate assembly (20) retracts into the concave chassis (10).

2. Carriage as claimed in claim 1, characterized in that a guide assembly (11) is provided on the concave base frame (10), the transition plate assembly (20) being movably arranged on the guide assembly (11) for movement between the operating position and the evacuation position.

3. The transportation vehicle of claim 2, wherein the guide assembly (11) comprises a plurality of guide holes (111), a plurality of positioning sliders (21) are arranged on the transition plate assembly (20), the plurality of positioning sliders (21) are arranged in one-to-one correspondence with the plurality of guide holes (111), and each positioning slider (21) is movably arranged in the corresponding guide hole (111) to move along the guide direction of the guide hole (111).

4. The transporter according to claim 3, further comprising:

a limiting assembly (30), wherein the limiting assembly (30) is arranged on the transition plate assembly (20) or the concave bottom frame (10) to limit the transition plate assembly (20) to move along a guide direction perpendicular to the guide assembly (11).

5. The transportation vehicle of claim 4, wherein the position-limiting assembly (30) comprises a positioning pin, and the positioning slide block (21) is provided with a positioning hole, and the positioning pin is inserted into the positioning hole and positioned in the guide hole (111) so as to limit the positioning pin in the guide hole (111) when the positioning slide block (21) moves along the guide hole (111).

6. Transport vehicle according to claim 1, characterized in that the transition plate assembly (20) comprises:

a first transition plate (22), the first transition plate (22) being slidably connected with the recessed chassis (10), the first transition plate (22) having a first working face;

a second transition panel (23), the second transition panel (23) being rotatably connected with the first transition panel (22), the second transition panel (23) having a second working surface, the second transition panel (23) having a deployed position and a stowed position;

when the second transition plate (23) is located at the unfolding position, the first working face and the second working face are located on the same plane, and when the second transition plate (23) is located at the accommodating position, the first working face and the second working face are attached oppositely.

7. The carrier vehicle according to claim 6, wherein the second transition plate (23) comprises a second working plate (231), the second working surface is located on the second working plate (231), second rib plates (232) are further respectively arranged on two sides of the second working plate (231), and the second rib plates (232) are vertically arranged on the lower side of the second working plate (231).

8. The transportation vehicle of claim 7, wherein the first transition plate (22) further comprises a bottom plate disposed at the lower side of the second working plate (231), and both ends of the bottom plate are respectively connected with the second rib plates (232) to form a wedge with the second working plate (231).

9. The carrier vehicle according to claim 7, wherein the first transition plate member (22) comprises a first working plate (221), the first working surface is located on the first working plate (221), first rib plates (222) are further respectively arranged on two sides of the first working plate (221), the first rib plates (222) are vertically arranged on the lower side of the first working plate (221), and the first rib plates (222) are arranged at one end, close to the second working plate (231), of the first working plate (221).

10. The transporter according to claim 1, wherein the transition plate assembly (20) is plural, and a plurality of the transition plate assemblies (20) are arranged spaced apart from each other.

Technical Field

The invention relates to the field of transportation, in particular to a transport vehicle.

Background

A piggyback carrier features that the movable slide table is unfolded by relative mechanism, and the concave chassis is moved out along the slide way of end chassis and the movable slide table to finish lifting for the upper and lower chassis of semi-trailer or highway truck.

However, when transporting and loading/unloading goods, the concave underframe is rotated out, at the moment, the road truck or the semitrailer is transferred to the transport vehicle for transportation through the concave underframe, and the end part of the existing concave underframe is higher than the ground by a certain distance, so that the truck is inconvenient to transfer up and down.

Disclosure of Invention

The invention mainly aims to provide a transport vehicle to solve the problem that a piggyback transport vehicle in the prior art is inconvenient to transfer trucks.

In order to achieve the above object, the present invention provides a transport vehicle comprising: the concave underframe is rotatably arranged on the transport vehicle and used for loading and unloading goods; the transition plate assembly is movably arranged on the concave underframe and is provided with a working position and an avoiding position; when the transition plate assembly is located at the working position, the transition plate assembly extends out of the concave underframe to connect the concave underframe with the ground; when the transition plate assembly is located at the avoiding position, the transition plate assembly retracts into the concave underframe.

Furthermore, a guide assembly is arranged on the concave underframe, and the transition plate assembly is movably arranged on the guide assembly to move between a working position and an avoiding position.

Furthermore, the guide assembly comprises a plurality of guide holes, a plurality of positioning sliding blocks are arranged on the transition plate assembly and are in one-to-one correspondence with the guide holes, and each positioning sliding block is movably arranged in the corresponding guide hole to move along the guide direction of the guide hole.

Further, the transport vehicle further comprises: and the limiting assembly is arranged on the transition plate assembly or the concave bottom frame to limit the transition plate assembly to move along the guide direction vertical to the guide assembly.

Furthermore, the limiting assembly comprises a positioning pin, a positioning hole is formed in the positioning slide block, the positioning pin is inserted into the positioning hole and is located in the guide hole, and therefore the positioning pin is limited in the guide hole when the positioning slide block moves along the guide hole.

Further, the transition plate assembly includes: the first transition plate is connected with the concave underframe in a sliding mode and is provided with a first working surface; the second transition plate is rotatably connected with the first transition plate and provided with a second working surface, and the second transition plate is provided with an unfolding position and a storage position; when the second transition plate is located at the unfolding position, the first working face and the second working face are located on the same plane, and when the second transition plate is located at the accommodating position, the first working face and the second working face are attached relatively.

Furthermore, the second transition plate comprises a second working plate, the second working surface is located on the second working plate, second rib plates are further arranged on two sides of the second working plate respectively, and the second rib plates are vertically arranged on the lower side of the second working plate.

Furthermore, the first transition plate further comprises a bottom plate, the bottom plate is arranged on the lower side of the second working plate, and two ends of the bottom plate are respectively connected with the second rib plate so as to form a wedge-shaped body with the second working plate. Furthermore, the first transition plate comprises a first working plate, the first working face is located on the first working plate, first rib plates are further arranged on two sides of the first working plate respectively, the first rib plates are vertically arranged on the lower side of the first working plate, and the first rib plates are arranged at one ends, close to the second working plate, of the first working plate.

Further, the transition plate assemblies are multiple, and the transition plate assemblies are arranged at intervals.

Further, the transition plate assembly may be foldably disposed on the concave chassis, or the transition plate assembly may be telescopically disposed on the concave chassis.

Further, the transition plate assembly comprises a first transition piece and a second transition piece, and a plurality of process holes are formed in the first transition piece and the second transition piece. Furthermore, the concave underframe comprises a first connecting plate, a guide plate and a second connecting plate, the first connecting plate and the second connecting plate are respectively vertically arranged at two ends of the guide plate, two guide assemblies are arranged on the guide plate, the transport vehicle comprises two transition plate assemblies, and the two transition plate assemblies are connected with the two guide assemblies in a one-to-one correspondence manner.

The transport vehicle applying the technical scheme of the invention is mainly a piggyback transport vehicle, which comprises a concave underframe and a transition plate assembly, wherein the concave underframe is rotatably arranged on the frame of the transport vehicle through a bogie, so that a train or a semi-trailer can get on or off the transport vehicle through the concave underframe, a transition plate assembly is arranged at one end of the concave underframe far away from the bogie and is used for connecting the concave underframe and the ground, thereby facilitating the upper and lower concave underframe of the truck, solving the problem that the piggyback transport vehicle in the prior art is inconvenient for loading and unloading the truck, in addition, the transition plate component is telescopically arranged on the concave underframe, when the goods need to be loaded and unloaded, the transition plate component extends out of the concave underframe and moves to the working position, thereby establish with ground and be connected, when the transport vechicle traveles, on the concave chassis of cab apron subassembly withdrawal, move to dodging the position to be convenient for deposit, prevent to interfere with other parts.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of this application, illustrate embodiments of the invention and, together with the description, serve to explain the invention and not to limit the invention. In the drawings:

FIG. 1 illustrates a schematic view of a transition plate assembly coupled to a female chassis of an embodiment of a transport vehicle according to the present invention;

FIG. 2 illustrates a top view of a transition plate assembly in an embodiment of a transport cart of the present invention;

FIG. 3 illustrates a side view of a transition plate assembly in an embodiment of a transport vehicle of the present invention;

FIG. 4 illustrates a schematic view of the connection of a first transition panel to a second transition panel in an embodiment of the transporter of the present invention;

FIG. 5 shows a schematic view of an embodiment of the guide assembly of the transport vehicle of the present invention;

FIG. 6 illustrates a schematic view of the connection of a transition plate assembly to a female chassis in an embodiment of a transporter of the invention;

FIG. 7 illustrates a schematic view of a transition plate assembly in an embodiment of a transport vehicle of the present invention in an avoidance position;

FIG. 8 is a schematic illustration of one of the transition plate assemblies in an operative position and the other transition plate assembly in an avoidance position in an embodiment of the transporter of the present invention;

fig. 9 shows a schematic overall structure of an embodiment of the transport vehicle of the present invention.

Wherein the figures include the following reference numerals:

10. a concave bottom frame; 11. a guide assembly; 111. a guide hole; 20. a transition plate assembly; 21. positioning the sliding block; 22. a first transition plate; 221. a first work plate; 222. a first rib plate; 23. a second transition plate; 231. a second work plate; 232. a second rib plate; 24. reinforcing ribs; 25. a fabrication hole; 30. and a limiting component.

Detailed Description

It should be noted that the embodiments and features of the embodiments in the present application may be combined with each other without conflict. The present invention will be described in detail below with reference to the embodiments with reference to the attached drawings.

The present invention provides a transportation vehicle, please refer to fig. 1 to fig. 9, including: a concave chassis 10, the concave chassis 10 being rotatably provided on the transport vehicle for loading and unloading goods; the transition plate assembly 20, the transition plate assembly 20 is movably arranged on the concave underframe 10, and the transition plate assembly 20 has a working position and an avoiding position; wherein, when the transition plate assembly 20 is located at the working position, the transition plate assembly 20 extends out of the concave underframe 10 to connect the concave underframe 10 with the ground; when the transition plate assembly 20 is in the avoidance position, the transition plate assembly 20 is retracted into the recessed chassis 10.

The transport vehicle of the invention is mainly a piggyback transport vehicle, which comprises a concave underframe 10 and a transition plate component 20, wherein the concave underframe is rotatablely arranged on the frame of the transport vehicle through a bogie, so that a train or a semi-trailer can get on or off the transport vehicle through the concave underframe, a transition plate assembly 20 is arranged at one end of the concave underframe far away from the bogie, the transition plate assembly 20 is used for connecting the concave underframe 10 and the ground, thereby facilitating the loading and unloading of the truck onto and from the lower concave underframe 10, and solving the problem that the piggyback transport vehicle in the prior art is inconvenient for loading and unloading the truck, in addition, the transition plate assembly 20 is telescopically arranged on the concave underframe 10, when it is desired to load and unload cargo, the transition plate assembly 20 is extended from the recessed chassis 10, moved to the operative position, thereby establishing a connection with the ground, and when the transport vehicle travels, the transition plate assembly 20 retracts onto the concave bottom frame and moves to an avoidance position, thereby facilitating storage and preventing interference with other components.

The concave underframe 10 is provided with a guide assembly 11, and the transition plate assembly 20 is movably arranged on the guide assembly 11 to move between a working position and a avoiding position. The guide assembly 11 includes a plurality of guide holes 111, a plurality of positioning sliders 21 are disposed on the transition plate assembly 20, the plurality of positioning sliders 21 are disposed in one-to-one correspondence with the plurality of guide holes 111, and each positioning slider 21 is movably disposed in a corresponding guide hole 111 to move in a guide direction of the guide hole 111.

As shown in fig. 5, the end of the concave bottom frame in this embodiment is provided with a guide assembly 11, the guide assembly 11 may be a slide rail or a guide hole 111, the guide hole 111 is an elongated hole, the elongated hole is arranged along the moving direction of the transition plate assembly, the bottom of the transition plate assembly 20 is provided with a plurality of positioning sliders 21, and each positioning slider 21 is inserted into the corresponding guide hole 111 to move along the length direction of the elongated hole, so that the transition plate assembly 20 moves and switches between the working position and the avoiding position.

The transport vechicle still includes: and the limiting assembly 30, the limiting assembly 30 is arranged on the transition plate assembly 20 or the concave bottom frame 10 to limit the transition plate assembly 20 to move along the guide direction perpendicular to the guide assembly 11. The limiting assembly 30 comprises a positioning pin, a positioning hole is formed in the positioning slide block 21, and the positioning pin is inserted into the positioning hole and located in the guide hole 111 so as to limit the positioning pin in the guide hole 111 when the positioning slide block 21 moves along the guide hole 111.

As shown in fig. 3, the transportation vehicle in this embodiment is further provided with a limiting assembly 30, preferably, the limiting assembly 30 is a positioning pin, the positioning slider 21 is disposed at the bottom of the transition plate assembly, the bottom of the positioning slider 21 is provided with a positioning hole, and after the positioning slider 21 of the transition plate assembly is placed into the guiding hole, the positioning pin is inserted into the positioning hole, so that the positioning slider 21 can be prevented from being disengaged from the guiding hole to a limited extent, and the transition plate assembly 20 and the recessed bottom frame are ensured to be always in a connection state.

The transition plate assembly 20 includes: a first transition plate 22, the first transition plate 22 being slidably connected with the recessed chassis 10, the first transition plate 22 having a first working surface; the second transition plate 23 is rotatably connected with the first transition plate 22, the second transition plate 23 is provided with a second working surface, and the second transition plate 23 is provided with an unfolding position and a storage position; when the second transition plate 23 is located at the unfolding position, the first working surface and the second working surface are located on the same plane, and when the second transition plate 23 is located at the accommodating position, the first working surface and the second working surface are attached relatively.

As shown in fig. 2-4, the transition plate assembly 20 in this embodiment includes two parts: first transition plate 22 and second transition plate 23, first transition plate 22 is used for being connected with concave chassis 10, second transition plate 23 is used for establishing with ground and is connected, articulated connection between first transition plate 22 and the second transition plate 23, when first transition plate 22 and second transition plate 23 are in the position of expansion, coplane is realized to first working face and second working face, thereby make the freight train enter into concave chassis 10 behind first working face and the second working face in proper order from ground, thereby get into the transport vechicle, when the transport vechicle unloads, then return according to the original way of loading route.

The second transition plate 23 includes a second working plate 231, the second working surface is located on the second working plate 231, second rib plates 232 are further respectively disposed on two sides of the second working plate 231, and the second rib plates 232 are vertically disposed on the lower side of the second working plate 231. The first transition plate 22 further includes a bottom plate disposed at the lower side of the second working plate 231, and two ends of the bottom plate are respectively connected to the second rib plates 232 to form a wedge with the second working plate 231. The first transition plate 22 includes a first working plate 221, the first working surface is located on the first working plate 221, two sides of the first working plate 221 are further respectively provided with a first rib plate 222, the first rib plate 222 is vertically arranged at the lower side of the first working plate 221, and the first rib plate 222 is arranged at one end of the first working plate 221 close to the second working plate 231.

As shown in fig. 3, the second transition plate 23 in this embodiment includes a second working plate 231 and a second rib plate 232 disposed at a side of the second working plate 231, and after the second transition plate 23 is unfolded, a bottom of the second rib plate 232 is attached to the ground to support the second working plate 231. The first transition plate member 22 includes a first working plate 221 and first rib plates 222 disposed at the bottom of both sides of the first working plate 221, and preferably, the length of the first rib plates 222 is less than half of the length of the first working plate, so that the transition plate member slides with respect to the guide member without interference.

The bottom of second working plate is equipped with a plurality of strengthening ribs 24, and a plurality of strengthening ribs 24 set up at intervals and extend along the incline direction of second working plate, and second working plate passes through a plurality of strengthening ribs 24 and is connected with ground. Preferably, the first transition plate 22 further includes a third rib plate, the second transition plate 23 further includes a fourth rib plate, the third rib plate is disposed on one side of the first transition plate 22 close to the second transition plate 23, and the fourth rib plate is disposed on one side of the second transition plate 23 close to the first transition plate 22, so as to prevent the truck from deforming the first working plate 221 and the second working plate 231.

The plurality of transition plate assemblies 20 are arranged, and the plurality of transition plate assemblies 20 are arranged at intervals.

Preferably, the number of the transition plate assemblies 20 in the embodiment is two, and the two transition plate assemblies 20 are arranged at the same end of the concave underframe 10 at intervals, so that two wheels of the truck respectively pass through the two transition plate assemblies 20 and simultaneously go up and down the concave underframe.

Cross the cab apron subassembly and adopt the fretwork design in order to alleviate the whole quality of transition plate subassembly under the prerequisite of assurance intensity, it leads to the vehicle to skid when transition plate subassembly from top to bottom in order to prevent to deposit water on the transition plate subassembly simultaneously, still set up a plurality of fabrication holes on the transition plate subassembly, it is concrete, cross the cab apron subassembly and include first transition plate and second transition plate, first transition plate and second transition plate are equipped with a plurality of fabrication holes 25, in order to alleviate the weight of transition plate subassembly, can in time discharge the rainwater when raining simultaneously.

The transition plate assembly is foldably arranged on the concave bottom frame, or the transition plate assembly is telescopically arranged on the concave bottom frame.

In this embodiment, through adopting folding or flexible form to connect transition board subassembly and concave chassis, reduce the space that transition board subassembly and concave chassis occupy after connecting, when transition board subassembly and concave chassis adopt folding mode to connect, cross the one end that the transition board subassembly rotationally sets up at concave chassis, and can upwards or rotate downwards relative to concave chassis, detain above or below concave chassis, when transition board subassembly and concave chassis adopt flexible connection, one adopts the top and the below sliding connection of transition board subassembly at concave chassis, in addition, the transition board subassembly can also set up in concave chassis, in order when stretching out, directly pull out transition board subassembly from concave chassis, during the transportation, it can to push back transition board subassembly in concave chassis.

In addition, the transition plate assembly and the concave underframe can be connected in a folding and telescopic combination mode.

From the above description, it can be seen that the above-described embodiments of the present invention achieve the following technical effects:

when the railway rotary piggyback transport vehicle is used for loading and unloading a highway truck or a semitrailer, the concave underframe is rotated out, at the moment, a set of transition plate assembly convenient for loading and unloading a highway truck or the semitrailer is required to be arranged, the transition plate assembly is transited from the ground to the concave underframe guiding assembly, the highway truck or the semitrailer can conveniently get on or off during loading and unloading, and the railway rotary piggyback transport vehicle can be folded and stored in the concave underframe when the loading and unloading are finished, so that the space is saved.

The scheme of the invention is mainly used for facilitating the loading and unloading of the road truck or the semi-trailer on the back of the transport vehicle. When the floor is assembled and disassembled, the cab apron transition plate assembly is unfolded and laid between the floor with the concave underframe and the ground; after the loading and unloading are finished, the transition plate assembly is folded, slides along the long round hole on the concave underframe guide assembly and is stacked on the concave underframe.

The transition plate component mainly comprises a second transition plate, a first transition plate, a connecting seat, a positioning sliding block, a supporting rod and the like. The bottom plate welding is under the second gusset, and when highway freight train went on or off the bus, the bottom plate supported subaerial, reduced the pressure of cab apron subassembly to ground, and the second gusset welding is on the second transition plate of bending, and first gusset welding is on the first transition plate of bending, and first gusset is slightly short, need avoid concave chassis floor supporting beam. As shown in fig. 4, the second transition plate and the first transition plate are connected through a connecting plate, the second transition plate and the first transition plate are respectively welded with a connecting seat, and a long circular hole is formed in the position of the second transition plate and the position of the first transition plate. The positioning sliding block is a rectangular plate and is arranged in the long round hole of the guide assembly, and the tail part of the positioning sliding block is provided with a positioning pin shaft to limit the positioning sliding block to be separated from the concave underframe and realize sliding. The supporting rod is welded at the end of the first transition plate, and the supporting device slides along the guide assembly.

Two boards of second transition plate and first transition plate all are the board of bending, and second transition plate and first transition plate are the fretwork design, and is specific, all opens at the two sides of bending has the slotted hole, and the short slab department of bending is equipped with the slotted hole. And the two plates are also provided with lightening holes with round holes and long round holes, so that the operation of personnel is facilitated.

As shown in fig. 9, the guiding assembly is mainly of a steel plate assembly welding structure, thick plates are arranged at two ends of the guiding assembly, a middle thin plate is provided with a guiding hole, the guiding hole is an oblong hole, the positioning slider can slide in the oblong hole, and as shown in fig. 6, the second rib plate is arranged on one side of the second transition plate close to the first transition plate.

After loading and unloading a highway truck, the transition plate assembly needs to be folded and placed on the concave bottom frame, and the principle is as follows: the second transition plate is manually operated to be folded on the first transition plate, a hand is placed in an operation hole of the first transition plate, a certain angle is lifted to push forwards, the supporting rod slides along the surface of the guide assembly, the positioning sliding block limits the left and right movement of the positioning sliding block in the long round hole of the guide assembly, the transition plate assembly is put down when the positioning sliding block slides to the end position of the long round hole, and the state is shown in fig. 7.

When the railway piggyback transport vehicle is used for loading and unloading a highway truck or a semitrailer, the concave underframe swings out along the end underframe and the movable sliding table and descends to the ground, but a supporting beam of the concave underframe is still a certain height away from the ground, so that the highway truck cannot be conveniently driven up and down. At the moment, the transition plate assembly is opened and paved between the ground and the concave underframe, and the concrete operation is as follows: the hand is arranged in the operation hole of the first transition plate, the transition plate assembly is pulled outwards, the supporting rod slides to the limit position along the guide assembly of the concave bottom frame, the transition plate assembly is put down, and then the second transition plate is opened to the ground. After the highway truck gets on or off the train, the transition plate assembly is folded and placed at the upper end of the concave underframe.

The scheme of the invention is mainly used for facilitating the loading and unloading of the road truck or the semi-trailer on the back of the transport vehicle. When the vehicle is assembled and disassembled, the transition plate assembly is opened and is laid between the concave underframe and the ground; after the loading and unloading are finished, the transition plate assembly is folded, slides along the long round hole of the concave underframe guide assembly and is stacked on the concave underframe. The structure is simple and reliable, the operation efficiency is high, and the popularization value is good.

It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of example embodiments according to the present application. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, and it should be understood that when the terms "comprises" and/or "comprising" are used in this specification, they specify the presence of stated features, steps, operations, devices, components, and/or combinations thereof, unless the context clearly indicates otherwise.

The relative arrangement of the components and steps, the numerical expressions and numerical values set forth in these embodiments do not limit the scope of the present invention unless specifically stated otherwise. Meanwhile, it should be understood that the sizes of the respective portions shown in the drawings are not drawn in an actual proportional relationship for the convenience of description. Techniques, methods, and apparatus known to those of ordinary skill in the relevant art may not be discussed in detail but are intended to be part of the specification where appropriate. In all examples shown and discussed herein, any particular value should be construed as merely illustrative, and not limiting. Thus, other examples of the exemplary embodiments may have different values. 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, further discussion thereof is not required in subsequent figures.

In the description of the present invention, it is to be understood that the orientation or positional relationship indicated by the orientation words such as "front, rear, upper, lower, left, right", "lateral, vertical, horizontal" and "top, bottom", etc. are usually based on the orientation or positional relationship shown in the drawings, and are only for convenience of description and simplicity of description, and in the case of not making a reverse description, these orientation words do not indicate and imply that the device or element being referred to must have a specific orientation or be constructed and operated in a specific orientation, and therefore, should not be considered as limiting the scope of the present invention; the terms "inner and outer" refer to the inner and outer relative to the profile of the respective component itself.

Spatially relative terms, such as "above … …," "above … …," "above … …," "above," and the like, may be used herein for ease of description to describe one device or feature's spatial relationship to another device or feature as illustrated in the figures. It will be understood that the spatially relative terms are intended to encompass different orientations of the device in use or operation in addition to the orientation depicted in the figures. For example, if a device in the figures is turned over, devices described as "above" or "on" other devices or configurations would then be oriented "below" or "under" the other devices or configurations. Thus, the exemplary term "above … …" can include both an orientation of "above … …" and "below … …". The device may be otherwise variously oriented (rotated 90 degrees or at other orientations) and the spatially relative descriptors used herein interpreted accordingly.

It should be noted that the terms "first", "second", and the like are used to define the components, and are only used for convenience of distinguishing the corresponding components, and the terms have no special meanings unless otherwise stated, and therefore, the scope of the present invention should not be construed as being limited.

The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.