阅读说明：本技术 限位结构、推移千斤顶和液压支架 (Limiting structure, pushing jack and hydraulic support ) 是由 柳佳岐 蔡东坡 朱庆波 于 2020-07-02 设计创作，主要内容包括：本发明提供了一种限位结构、推移千斤顶和液压支架,包括：安装座,安装座上开设有第一凹槽；限位块,限位块设于安装座的上方,限位块上开设有第二凹槽；其中,第一凹槽与第二凹槽相适配,第一凹槽与第二凹槽形成安装孔,通过将限位块设于安装座的上方,并与安装座相配合形成安装孔对销轴进行限位固定,在保证设备可靠性的前提下,对限位结构进行优化,使得结构简单,减少零件加工工艺,进而降低零件生产成本,进一步地,上述限位结构还易于装配,从而降低装配工时,提高装配效率。另外,还可以提高设备的可靠性,降低设备在使用过程中发生故障的风险。(The invention provides a limit structure, a pushing jack and a hydraulic support, which comprise: the mounting seat is provided with a first groove; the limiting block is arranged above the mounting seat and provided with a second groove; wherein, first recess and second recess looks adaptation, first recess forms the mounting hole with the second recess, through locating the stopper in the top of mount pad to cooperate with the mount pad to form the mounting hole and carry out spacing fixed to the round pin axle, under the prerequisite of guaranteeing equipment reliability, optimize limit structure, make simple structure, reduce the parts machining technology, and then reduce part manufacturing cost, furtherly, above-mentioned limit structure still easily assembles, thereby when reducing the assembly, improve assembly efficiency. In addition, the reliability of the equipment can be improved, and the risk of the equipment breaking down in the using process can be reduced.)

1. A limit structure, comprising:

the mounting seat is provided with a first groove;

the limiting block is arranged above the mounting seat and provided with a second groove;

the first groove is matched with the second groove, and the first groove and the second groove form a mounting hole.

2. The spacing structure of claim 1, wherein said spacing block comprises:

a limiting block body,

the number of the first connecting holes is at least two, and the first connecting holes are respectively arranged on the limiting block body in a penetrating mode and distributed on two sides of the second groove.

3. The restraint structure of claim 2 wherein the mount includes:

a mounting seat body is arranged on the base body,

the second connecting holes are in one-to-one correspondence with the first connecting holes, and the second connecting holes extend to the inside of the mounting seat body along the axial direction of the first connecting holes.

4. The spacing structure of claim 3,

and one side of the bottom of the mounting seat body is provided with a chamfer.

5. The spacing structure of claim 3, further comprising:

the number of the fasteners corresponds to that of the first connecting holes or the second connecting holes, and the fasteners penetrate through the first connecting holes and the second connecting holes respectively to fixedly connect the limiting block with the mounting seat.

6. The spacing structure of claim 3,

the first connecting hole is a stepped hole, and the second connecting hole is a threaded hole.

7. The spacing structure of claim 5,

the fastener is a socket head cap screw and comprises a guide section and a fixing section.

8. The spacing structure of any of claims 1 to 7,

the length of the limiting block is equal to that of the mounting seat; or

The length of the limiting block is smaller than that of the mounting seat.

9. A pushing jack comprising a plurality of spacing structures as claimed in any one of claims 1 to 8;

the body is provided with a plurality of grooves,

the first connecting shaft penetrates through the body, two ends of the first connecting shaft are respectively and partially exposed out of the body, and two limiting structures in the plurality of limiting structures are respectively connected with two ends of the first connecting shaft;

the second connecting shaft penetrates through the body, two ends of the second connecting shaft are partially exposed out of the body respectively, and the other two limiting structures in the plurality of limiting structures are connected with two ends of the second connecting shaft respectively.

10. A hydraulic prop, characterized by comprising a pusher jack according to claim 9;

the push rod is fixedly connected with two limiting structures in the plurality of limiting structures of the pushing jack;

the hydraulic support base is fixedly connected with the other two limiting structures in the plurality of limiting structures of the pushing jack.

Technical Field

The invention relates to the technical field of hydraulic support equipment, in particular to a limiting structure, a pushing jack and a hydraulic support.

Background

In a mine, the hydraulic support moves forwards by acting a pushing jack piston rod on the tail part of a push rod connected with the hydraulic support, and a main body of the hydraulic support is pushed forwards by a reaction force, wherein the bottom of a pushing jack cylinder and a piston rod head are respectively hinged with a base of the hydraulic support and the push rod through a pin shaft for assembly and fixation, and due to the structural characteristics of the hydraulic support and the limitation of an assembly mode, a structural member for fixing the pin shaft cannot be made into a complete hole for assembly with the pin shaft.

Currently, in the related art, as shown in fig. 1, a pin is put into a groove of a U-shaped seat 10 ', a pressing block 20 ' is put into the groove, a hole is formed in the side of the groove, the pressing block 20 ' is connected and fixed with the U-shaped seat 10 ' by a longitudinal pin 30 ', and the end of the longitudinal pin 30 ' is limited to move axially by a clip 40 '.

However, the number of parts of the fixing pin is large, and the assembly is time-consuming and difficult, which reduces the work efficiency of product manufacture.

Disclosure of Invention

The present invention is directed to solving at least one of the problems of the prior art or the related art.

To this end, an embodiment according to the first aspect of the invention provides a spacing structure.

An embodiment according to a second aspect of the invention provides a advancing jack.

An embodiment according to a third aspect of the invention provides a hydraulic mount.

In view of the above, according to a first aspect of the present invention, there is provided a position limiting structure, including: the mounting seat is provided with a first groove; the limiting block is arranged above the mounting seat and provided with a second groove; the first groove is matched with the second groove, and the first groove and the second groove form a mounting hole.

The invention provides a limiting structure, which comprises a mounting seat and a limiting block, wherein a first groove is formed in the mounting seat, a second groove is formed in the limiting block, the limiting block is arranged above the mounting seat, the first groove and the second groove are matched to form a mounting hole, the limiting block is arranged above the mounting seat and matched with the mounting seat to form the mounting hole to limit and fix a pin shaft, and the limiting structure is optimized on the premise of ensuring the reliability of equipment, so that the structure is simple, the part processing technology is reduced, the part production cost is further reduced, further, the limiting structure is easy to assemble, the assembling working time is reduced, and the assembling efficiency is improved.

In addition, the limiting structure does not need to be provided with a hole on the side part of the mounting seat, and does not need to be provided with the longitudinal pin shaft penetrating through the hole and the clip limiting the longitudinal pin shaft, so that the situation that the clip interferes with other structures due to rotation of the longitudinal pin shaft is avoided, equipment damage is caused, the reliability of the equipment is improved, and the risk that the equipment breaks down in the using process is reduced.

According to the technical scheme of the invention, the invention can also have the following additional technical characteristics:

in the above technical scheme, further, the stopper includes: the stopper body, first connecting hole, the quantity of first connecting hole is at least two, and at least two first connecting holes are seted up on the stopper body with lining up respectively, and at least two first connecting holes distribute in the both sides of second recess.

In this technical scheme, the stopper includes stopper body and first connecting hole, wherein the quantity of first connecting hole is at least two, locate the stopper body with lining up on, make the stopper carry out fixed connection through first connecting hole and mount pad through setting up first connecting hole, need not trompil on the lateral part of mount pad, also need not to set up the checkpost that passes the vertical round pin axle in this hole and restrict the vertical round pin axle again, thereby avoid vertical round pin axle rotatory and make checkpost and other structures take place to interfere, and then cause the equipment to damage, improve equipment's reliability, reduce the risk that equipment broke down in the use.

Further, at least two first connecting holes are distributed on two sides of the second groove, so that the stress of the limiting structure is uniform when the equipment is used, and the limiting failure of the limiting structure due to uneven stress is avoided, and the equipment is damaged.

In the above technical solution, further, the mount includes: the mounting seat body, the second connecting hole, second connecting hole and first connecting hole one-to-one, the second connecting hole is extended to the inside of mounting seat body by the axial direction of mounting seat body along first connecting hole.

In this technical scheme, the mount pad includes mount pad body and second connecting hole, and wherein, the second connecting hole extends to the inside of mount pad body along first connecting hole axial direction, and the stopper cooperatees through first connecting hole and second connecting hole with the mount pad and carries out fixed connection, simple structure, and easily assembly reduces part manufacturing cost, guarantees under the prerequisite of equipment reliability, reduces when assembling, improves assembly efficiency.

In the above technical solution, further, a chamfer is provided at one side of the bottom of the mounting seat.

In this technical scheme, the chamfer has been seted up to one side of mount pad bottom, and when assembling limit structure, the bottom of mount pad is used for fixed connection, through seting up the chamfer in the bottom of mount pad, is convenient for assemble, also can avoid limit structure to assemble when taking place to interfere with other structures, and then influences assembly progress and assembly efficiency.

In the above technical solution, further, the limit structure further includes: the number of the fasteners corresponds to the number of the first connecting holes or the second connecting holes, and the fasteners penetrate through the first connecting holes and the second connecting holes respectively to fixedly connect the limiting block with the mounting seat.

In this technical scheme, limit structure still includes the fastener, the quantity one-to-one of fastener and first connecting hole or the quantity of second connecting hole, and the fastener passes first connecting hole and second connecting hole respectively and carries out fixed connection with stopper and mount pad, and simple structure easily assembles, can accomplish the spacing fixed to the round pin axle through less part quantity promptly, simplifies the part characteristic, reduces part manufacturing cost.

In the above technical scheme, further, the first connecting hole is a stepped hole, and the second connecting hole is a threaded hole.

In the technical scheme, the first connecting hole is a stepped hole, the second connecting hole is a threaded hole, the fastener penetrates through the first connecting hole to fixedly connect the limiting block with the mounting seat, and through the stepped hole, the fastener can be completely immersed in the first connecting hole after being screwed into the first connecting hole and the second connecting hole or partially immersed in the first connecting hole, so that the situation that the part of the fastener exposed out of the limiting structure is more is avoided, the interference with other structures occurs in the use process of equipment, the equipment is damaged, the reliability in the use process of the equipment is further guaranteed, and the risk of failure in the use process of the equipment is reduced.

In above-mentioned technical scheme, further, the fastener is hexagon socket head cap head screw, and the fastener includes direction section and canned paragraph.

In this technical scheme, the fastener can be hexagon socket head cap screw, cooperate through hexagon socket head cap screw and first connecting hole and second connecting hole and carry out fixed connection with stopper and mount pad, accomplish the spacing fixed of round pin axle, fastener simple structure, low cost to further reduce the manufacturing cost of equipment, furtherly, the fastener includes direction section and canned paragraph, the direction section is used for leading when fastener and first connecting hole assemble, further improves limit structure's assembly efficiency.

In the above technical solution, further, the length of the limiting block is equal to the length of the mounting seat; or the length of the limiting block is smaller than that of the mounting seat.

In this technical scheme, the length of stopper can equal with the length of mount pad, thereby easily the assembly, furtherly, the length of stopper can also be less than the length of mount pad, thereby when guaranteeing that limit structure carries out spacing fixed to the round pin axle, further reduce equipment's manufacturing cost, in addition, length through setting up the stopper is less than the length of mount pad, thereby make equipment in the use, avoid stopper and other structures to take place to interfere, cause equipment damage, further guarantee the reliability in the equipment use, reduce the risk that breaks down in the equipment use.

The second aspect of the present invention provides a pushing jack, which has the limiting structure provided in any one of the technical solutions of the first aspect of the present invention, so that the pushing jack has all the beneficial effects of the limiting structure provided in any one of the technical solutions, and details are not repeated herein.

The third aspect of the present invention provides a hydraulic support, which has the pushing jack provided in any one of the second aspect of the present invention, so that the hydraulic support has all the beneficial effects of the pushing jack provided in any one of the above technical solutions, and details are not repeated herein.

Drawings

The above and/or additional aspects and advantages of the present invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:

fig. 1 is a schematic structural view illustrating a structural member for fixing a pin shaft in the related art;

FIG. 2 illustrates a schematic structural diagram of a spacing structure according to an embodiment of the present invention;

FIG. 3 is a schematic structural diagram illustrating a stopper according to an embodiment of the present invention;

FIG. 4 shows a schematic structural diagram of a spacing structure according to another embodiment of the invention;

FIG. 5 shows a schematic structural diagram of a spacing structure according to yet another embodiment of the invention;

FIG. 6 shows a schematic structural view of a fastener according to one embodiment of the present invention.

Wherein, the correspondence between the reference numbers and the part names in fig. 1 to 6 is:

10 'U type seat, 20' briquetting, 30 'longitudinal pin axle, 40' checkpost, 10 mounts, 102 first recess, 20 stopper, 202 second recess, 204 stopper body, 206 first connecting hole, 104 mounts body, 108 chamfers, 30 fasteners, 302 guide section, 304 fixed segment, 4 pass jack, 5 push rods.

Detailed Description

So that the manner in which the above recited aspects, features and advantages of the present invention can be understood in detail, a more particular description of the invention, briefly summarized above, may be had by reference to the embodiments thereof which are illustrated in the appended drawings. It should be noted that the embodiments and features of the embodiments of the present application may be combined with each other without conflict.

In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention, however, the present invention may be practiced in other ways than those specifically described herein, and therefore the scope of the present invention is not limited by the specific embodiments disclosed below.

The limit structure, the pushing jack 4 and the hydraulic bracket according to some embodiments of the present invention will be described below with reference to fig. 2 to 6.

As shown in fig. 2, an embodiment of the first aspect of the present invention provides a limiting structure, including: the mounting structure comprises a mounting seat 10, wherein a first groove 102 is formed in the mounting seat 10; the limiting block 20 is arranged above the mounting seat 10, and a second groove 202 is formed in the limiting block 20; the first groove 102 is matched with the second groove 202, and the first groove 102 and the second groove 202 form a mounting hole.

The invention provides a limiting structure which comprises an installation seat 10 and a limiting block 20, wherein a first groove 102 is formed in the installation seat 10, a second groove 202 is formed in the limiting block 20, the limiting block 20 is arranged above the installation seat 10, and the first groove 102 and the second groove 202 are matched to form an installation hole. Through locating stopper 20 in the top of mount pad 10 to cooperate with mount pad 10 and form the mounting hole and carry out spacing fixed to the round pin axle, under the prerequisite of guaranteeing equipment reliability, optimize limit structure, make simple structure, reduce the parts machining technology, and then reduce part manufacturing cost, furtherly, above-mentioned limit structure still easily assembles, thereby reduces during the assembly, improves assembly efficiency.

In addition, the limiting structure does not need to be provided with a hole on the side part of the mounting seat 10, and does not need to be provided with a longitudinal pin shaft penetrating through the hole and a clip limiting the longitudinal pin shaft, so that the phenomenon that the clip interferes with other structures due to rotation of the longitudinal pin shaft is avoided, equipment damage is further caused, the reliability of the equipment is improved, and the risk that the equipment breaks down in the using process is reduced.

The mounting hole is used for mounting and connecting a first pin shaft at the bottom of the cylinder of the pushing jack 4, or the mounting hole is used for mounting and connecting a second pin shaft at the head of a piston rod of the pushing jack 4.

As shown in fig. 3, in any of the above embodiments, further, the limiting block 20 includes: the stopper body 204, first connecting hole 206, the quantity of first connecting hole 206 is at least two, and at least two first connecting holes 206 run through respectively and set up on the stopper body 204, and at least two first connecting holes 206 distribute in the both sides of second recess 202.

In this embodiment, the stopper 20 includes a stopper body 204 and at least two first connection holes 206, and the at least two first connection holes 206 are penetratingly disposed on the stopper body 204. Make stopper 20 carry out fixed connection through setting up first connecting hole 206 with mount pad 10 through first connecting hole 206, need not to trompil on the lateral part of mount pad 10, also need not to set up the checkpost that passes the vertical round pin axle in this hole and restriction vertical round pin axle again to avoid vertical round pin axle rotation and make checkpost and other structures take place to interfere, and then cause equipment to damage, improve equipment's reliability, reduce the risk that equipment broke down in the use.

Further, at least two first connecting holes 206 are distributed on two sides of the second groove 202, so that the stress of the limiting structure is uniform in the use process of the equipment, and the limiting failure of the limiting structure due to uneven stress is avoided, and the equipment is damaged.

As shown in fig. 4 and 5, in any of the above embodiments, further, the mounting seat 10 includes: mount pad body 104, second connecting hole and first connecting hole 206 one-to-one, the second connecting hole is extended to the inside of mount pad body 104 along the axial direction of first connecting hole 206 by mount pad body 104.

In this embodiment, mount pad 10 includes mount pad body 104 and second connecting hole, and wherein, the second connecting hole extends to the inside of mount pad body 104 along first connecting hole 206 axial direction, and stopper 20 cooperatees through first connecting hole 206 and second connecting hole with mount pad 10 and carries out fixed connection, simple structure, easily assembly reduces part manufacturing cost, guarantees under the prerequisite of equipment reliability, reduces when assembling, improves assembly efficiency.

In any of the above embodiments, as shown in fig. 4, further, one side of the bottom of the mounting seat 10 is provided with a chamfer 108.

In this embodiment, a chamfer 108 is formed on one side of the bottom of the mounting seat 10, and the bottom of the mounting seat 10 is used for fixing connection when the limiting structure is assembled. It should be noted that, the chamfer 108 is a welding chamfer 108, that is, the bottom of the mounting seat 10 is used for fixed connection in a welding manner, and the chamfer 108 is formed at the bottom of the mounting seat 10, so that the assembly is facilitated, and interference with other structures when the limiting structure is assembled can be avoided, thereby affecting the assembly progress and the assembly efficiency.

As shown in fig. 1 and 6, in any of the above embodiments, further, the limiting structure further includes: the number of the fasteners 30 corresponds to the number of the first connecting holes 206 or the second connecting holes, and the fasteners 30 respectively penetrate through the first connecting holes 206 and the second connecting holes to fixedly connect the limiting block 20 and the mounting base 10.

In this embodiment, limit structure still includes fastener 30, fastener 30 and the quantity one-to-one of first connecting hole 206 or the quantity of second connecting hole, fastener 30 passes first connecting hole 206 and second connecting hole respectively and carries out fixed connection with stopper 20 and mount pad 10, and simple structure easily assembles, can accomplish the spacing fixed to the round pin axle through less part quantity promptly, simplifies the part characteristic, reduces part manufacturing cost.

In a specific embodiment, the first connection hole 206 is a stepped hole, and the second connection hole is a threaded hole.

In this embodiment, the first connecting hole 206 is a stepped hole, the second connecting hole is a threaded hole, and the fastening member 30 passes through the first connecting hole 206 to fixedly connect the stopper 20 and the mounting base 10. Through setting up the shoulder hole, can make fastener 30 in screw in first connecting hole 206 and second connecting hole, immerse in first connecting hole 206 completely, or partly immerse in first connecting hole 206 to avoid fastener 30 to expose in limit structure's part more, and take place to interfere with other structures in the use of equipment, cause equipment to damage, further guarantee the reliability in the equipment use, reduce the risk that breaks down in the equipment use.

It should be noted that the first connection hole 206 may be a counter-sunk hole.

In any of the above embodiments, further, the fastener 30 is a socket head cap screw, and the fastener 30 includes a guiding section 302 and a fixing section 304, as shown in fig. 6.

In this embodiment, the fastener 30 can be an inner hexagonal socket head cap screw, and the inner hexagonal socket head cap screw is matched with the first connecting hole 206 and the second connecting hole to fixedly connect the limiting block 20 and the mounting base 10, so that the limiting fixation of the pin shaft is completed, the fastener 30 is simple in structure and low in cost, and the production cost of the equipment is further reduced. Further, the fastener 30 comprises a guiding section 302 and a fixing section 304, wherein the guiding section 302 is used for guiding when the fastener 30 is assembled with the first connecting hole 206, and the assembling efficiency of the limiting structure is further improved.

It should be noted that the fastener 30 may also be other screw structures.

As shown in fig. 4 and 5, in any of the above embodiments, further, the length of the limiting block 20 is equal to the length of the mounting seat 10; or the length of the limiting block 20 is smaller than that of the mounting seat 10.

In this embodiment, the length of stopper 20 can equal with the length of mount pad 10 to easily the assembly, further, the length of stopper 20 can also be less than the length of mount pad 10, thereby when guaranteeing that limit structure carries out spacing fixed to the round pin axle, further reduction equipment's manufacturing cost. In addition, the length of the limiting block 20 is smaller than that of the mounting seat 10, so that the limiting block 20 is prevented from interfering with other structures to cause equipment damage in the use process of the equipment, the reliability of the equipment in the use process is further ensured, and the risk of failure in the use process of the equipment is reduced.

In addition, the length relationship between the limiting block 20 and the mounting seat 10 is properly selected according to the specific structure of the device, so as to avoid interference with other structures.

In an embodiment of the second aspect of the present invention, a pushing jack 4 is provided, which has the limiting structure provided in any one of the embodiments of the first aspect of the present invention, so that the pushing jack 4 has all the beneficial effects of the limiting structure provided in any one of the embodiments, and details are not repeated herein.

In this embodiment, pass jack 4 and include the body, four limit structure, first connecting axle and second connecting axle, first connecting axle passes the body, and the both ends of first connecting axle all partially expose in the body, wherein two limit structure carry out assembly connection with the both ends of first connecting axle respectively to the completion passes the assembly connection of jack 4 piston rod head, carries out fixed connection with limit structure's lateral wall and hydraulic support's base, wherein, adopt the welded mode to carry out fixed connection, the completion passes the fixed connection of jack 4 and hydraulic support.

Further, the second connecting shaft penetrates through the other end of the body, two ends of the second connecting shaft are partially exposed out of the body, bottoms of the other two limiting structures are fixedly connected with the push rod 5 respectively, wherein the second connecting shaft is fixedly connected in a welding mode, two ends of the second connecting shaft are installed on the installation bases 10 of the other two limiting structures respectively, the limiting blocks 20 are assembled with the installation bases 10, the fastening pieces 30 are screwed, and the assembling connection of the bottom of the pushing jack 4 and one end of the push rod 5 is completed.

Adopt a plurality of limit structure to accomplish the assembly process of advancing jack 4, simple structure, easily assembly, and can effectively avoid equipment to take place to interfere with other structures in the use, cause equipment to damage, improve equipment's reliability.

In an embodiment of the third aspect of the present invention, a hydraulic support is provided, which has the pushing jack 4 provided in any embodiment of the second aspect of the present invention, so that the hydraulic support has all the beneficial effects of the pushing jack 4 provided in any embodiment described above, and details are not described here.

In this embodiment, hydraulic support includes push rod 5 and hydraulic support base, and first connecting axle passes the body, and the both ends of first connecting axle all partially expose in the body, and wherein two limit structure carry out assembly connection with the both ends of first connecting axle respectively to the completion is passed the assembly connection of jack 4 piston rod head, carries out fixed connection with limit structure's lateral wall and hydraulic support's base, and wherein, adopts the welded mode to carry out fixed connection, accomplishes the fixed connection who passes jack 4 and hydraulic support. Further, the second connecting shaft penetrates through the other end of the body, two ends of the second connecting shaft are partially exposed out of the body, bottoms of the other two limiting structures are fixedly connected with the push rod 5 respectively, wherein the second connecting shaft is fixedly connected in a welding mode, two ends of the second connecting shaft are installed on the installation bases 10 of the other two limiting structures respectively, the limiting blocks 20 are assembled with the installation bases 10, the fastening pieces 30 are screwed, and the assembling connection of the bottom of the pushing jack 4 and one end of the push rod 5 is completed. Adopt a plurality of limit structure to accomplish the assembly process of advancing jack 4, simple structure, easily assembly, and can effectively avoid equipment to take place to interfere with other structures in the use, cause equipment to damage, improve equipment's reliability.

In the description of the present invention, the terms "plurality" or "a plurality" refer to two or more, and unless otherwise specifically limited, the terms "upper", "lower", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are merely for convenience in describing the present invention and simplifying the description, but do not indicate or imply that the referred device or element must have a specific orientation, be constructed in a specific orientation, and be operated, and thus should not be construed as limiting the present invention; the terms "connected," "mounted," "secured," and the like are to be construed broadly and include, for example, fixed connections, removable connections, or integral connections; may be directly connected or indirectly connected through an intermediate. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.

In the description of the present invention, the description of the terms "one embodiment," "some embodiments," "specific embodiments," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present invention. In the present invention, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

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.