阅读说明：本技术 一种汽车刹车片加工用分级研磨装置 (Automobile brake block processing is with hierarchical grinder ) 是由 张道乐 杜中权 郑英均 于 2021-08-25 设计创作，主要内容包括：本发明涉及汽车加工技术领域,尤其是一种汽车刹车片加工用分级研磨装置,针对现有技术中研磨效率低、研磨劳动强度大的问题,现提出如下方案,其包括：壳体,所述壳体的内侧固接有操作板,壳体的内侧顶部安装有升降板以及用于驱动升降板升降的伸缩组件,所述操作板的顶部阵列开设有多个放置槽,且多个放置槽相对的两侧内壁均开设有安装口。本发明结构合理,结构稳定,操作简单,不仅实现了对刹车片进行多个级别精度的研磨,还能够同时的对多个刹车片进行固定,并保证在对刹车片研磨之前能够将刹车片进行夹持,在研磨完成之后,自动解除夹持,有效的降低了研磨的劳动强度,提高了研磨效率,易于推广使用。(The invention relates to the technical field of automobile processing, in particular to a grading grinding device for processing an automobile brake pad, which aims at solving the problems of low grinding efficiency and high grinding labor intensity in the prior art and provides the following scheme, comprising the following steps of: the casing, the inboard rigid coupling of casing has the operation panel, and the lifter plate and be used for driving the flexible subassembly that the lifter plate goes up and down are installed at the inboard top of casing, a plurality of standing grooves have been seted up to the top array of operation panel, and the installing port has all been seted up to the both sides inner wall that a plurality of standing grooves are relative. The grinding device is reasonable in structure, stable in structure and simple in operation, not only can be used for grinding the brake pads at multiple levels of precision, but also can be used for fixing the brake pads simultaneously, the brake pads can be clamped before being ground, and after the grinding is finished, the clamping is automatically released, so that the grinding labor intensity is effectively reduced, the grinding efficiency is improved, and the grinding device is easy to popularize and use.)

1. The utility model provides a car brake block processing is with hierarchical grinder which characterized in that includes:

the lifting device comprises a shell (1), wherein an operation plate (4) is fixedly connected to the inner side of the shell (1), a lifting plate (20) and a telescopic assembly used for driving the lifting plate (20) to lift are mounted at the top of the inner side of the shell (1), a plurality of placing grooves (5) are formed in the top of the operation plate (4) in an array mode, and mounting openings (7) are formed in the inner walls of two opposite sides of the plurality of placing grooves (5);

the grinding mechanism comprises a rotating plate (21) which is rotatably connected to the bottom of the lifting plate (20), a plurality of grinding blocks (25) which are arranged at the bottom of the rotating plate (21), and an adjusting component which is used for adjusting the lifting of the grinding blocks (25); and

the clamping mechanism is installed in the placing groove (5) and comprises clamping blocks (8) installed on the inner sides of the two installation ports (7), a transmission shaft (14) rotatably connected to the inner sides of the installation ports (7) and a cam (15) fixedly sleeved outside the transmission shaft (14), the edge of the cam (15) is abutted to one end, far away from the placing groove (5), of each clamping block (8), a clamping area is formed between the two clamping blocks (8), and a linkage mechanism is arranged between the clamping mechanism and the lifting plate (20);

wherein, the lifting plate (20) descends, and the linkage mechanism operates to drive the transmission shaft (14) to rotate so as to adjust the size of the clamping area.

2. The graded grinding device for processing the automobile brake pad as claimed in claim 1, wherein the telescopic assembly comprises two first electric telescopic rods (19) fixedly connected to the top of the inner side of the shell (1), and the extending ends of the two first electric telescopic rods (19) are fixedly connected to the top of the lifting plate (20).

3. The grading grinding device for machining the automobile brake pad according to claim 1, wherein the adjusting assembly comprises eight storage tanks (23) arranged at the bottom of the rotating plate (21) in an annular array mode, a mounting plate (24) arranged on the inner side of each storage tank (23), a cavity (26) arranged inside the rotating plate (21), a plurality of second electric telescopic rods (27) fixedly connected to the inner side of each cavity (26) and a driving motor (22) arranged at the top of the lifting plate (20) and used for driving the rotating plate (21) to rotate, the extending ends of the second electric telescopic rods (27) are uniformly connected to the inner sides of the eight storage tanks (23) and the top of the mounting plate (24) in a fixed mode, and the grinding blocks (25) are fixedly connected with the mounting plate (24) through bolts.

4. The grading grinding device for machining the automobile brake pad according to claim 1, wherein the linkage mechanism comprises a plurality of mounting holes (10) formed in outer walls of two sides of the operating plate (4) and corresponding to the placing grooves (5), a transmission rod (11) arranged on the inner side of the mounting holes (10) in a sliding manner, two tooth sockets (12) formed in the top of the transmission rod (11), and a gear (13) arranged on the inner side of the tooth sockets (12) in a meshing manner, the bottom of the transmission shaft (14) extends to the inner side of the mounting holes (10) and is fixedly connected with the top center of the gear (13), one end of the transmission rod (11) located on the inner side of the mounting holes (10) is provided with a second spring (16), the other end of the transmission rod (11) extends to the outer side of the mounting holes (10), and the linkage mechanism further comprises a bottom plate (28) fixedly connected to inner walls of two sides of the shell (1), Install driving plate (34) below bottom plate (28), install two spliced poles (31) at driving plate (34) top, the adapter sleeve (29) at spliced pole (31) outside top, four are established to the activity cover the top of adapter sleeve (29) and the bottom rigid coupling of lifter plate (20), and the inboard of four adapter sleeves (29) all installs third spring (30), the bottom of four spliced poles (31) all extends to the bottom of bottom plate (28) and respectively with the top rigid coupling of two driving plates (34), one side mutual butt that driving plate (34) and transfer line (11) are close to each other.

5. The grading grinding device for machining the automobile brake pad according to claim 4, wherein the sides of the transmission rod (11) and the transmission plate (34) close to each other are smooth inclined surfaces.

6. The graded grinding device for machining the automobile brake pad as claimed in claim 4, wherein a plurality of tension springs (33) are fixedly connected to the bottoms of the two bottom plates (28), and the bottoms of the tension springs (33) are fixedly connected to the tops of the two transmission plates (34) respectively.

7. The grading grinding device for machining the automobile brake pad according to claim 1, wherein a first spring (9) is movably sleeved outside one end of each of the clamping blocks (8) far away from the cam (15).

8. The grading grinding device for machining the automobile brake pad according to claim 1, wherein a plurality of dust removal through holes (6) are formed in the top of the operating plate (4), a dust collection funnel (17) is fixedly connected to the bottom of the operating plate (4), and a dust collector (18) is installed at the bottom of the dust collection funnel (17).

9. The graded grinding device for processing the automobile brake pad is characterized in that eight cleaning brushes (32) are fixedly connected to the bottom of the rotating plate (21), the eight cleaning brushes (32) and the eight grinding blocks (25) are alternately distributed, and the eight cleaning brushes (32) are matched in pairs to form four grinding grades.

10. The grading grinding device for machining the automobile brake pad according to claim 1, wherein an operation door (2) is installed outside one side of the front surface of the shell (1), and a PLC (programmable logic controller) is installed on the outer wall of one side of the shell (1).

Technical Field

The invention relates to the field of automobile processing, in particular to a grading grinding device for processing an automobile brake pad.

Background

The automobile brake pad is also called as automobile brake shoe, and refers to a friction material fixed on a brake drum or a brake disc rotating with a wheel, wherein a friction lining and a friction pad bear external pressure to generate friction action so as to achieve the aim of reducing the speed of the automobile. The automobile brake pad is generally composed of a steel plate, a bonding heat insulation layer and a friction block, the steel plate is coated to prevent rust, and the temperature distribution in the coating process is detected by an SMT-4 furnace temperature tracker in the coating process to ensure the quality.

In the brake block production process among the prior art, the thick embryo of brake block needs to carry out grinding treatment to the deckle edge of brake block after thermal treatment to guarantee the roughness on brake block surface, the surperficial lapping of current brake block adopts artifical grinding treatment more, and grinding efficiency is lower, often needs to select the grinding piece at different grade numbers level according to the surface of brake block in the course of grinding, and intensity of labour is great, for this reason, this scheme has proposed a hierarchical grinder for automobile brake block processing.

Disclosure of Invention

The invention provides a grading grinding device for machining an automobile brake pad, which solves the problems of low grinding efficiency and high grinding labor intensity in the prior art.

In order to achieve the purpose, the invention adopts the following technical scheme:

the utility model provides an automobile brake block processing is with hierarchical grinder, includes:

the lifting plate and the telescopic assembly are mounted at the top of the inner side of the shell, a plurality of placing grooves are formed in the top array of the operating plate, and mounting openings are formed in the inner walls of two opposite sides of the plurality of placing grooves;

the grinding mechanism comprises a rotating plate which is rotatably connected to the bottom of the lifting plate, a plurality of grinding blocks which are arranged at the bottom of the rotating plate, and an adjusting assembly for adjusting the lifting of the grinding blocks; and

the clamping mechanism is arranged in the placing groove and comprises clamping blocks arranged on the inner sides of the two mounting ports, a transmission shaft rotatably connected to the inner sides of the mounting ports and a cam fixedly sleeved outside the transmission shaft, the edge of the cam is abutted to one end, far away from the placing groove, of each clamping block, a clamping area is formed between the two clamping blocks, and a linkage mechanism is arranged between the clamping mechanism and the lifting plate;

wherein, the lifter plate descends, and the link gear operation work drives the transmission shaft and rotates to adjust the size in centre gripping region.

Preferably, the telescopic assembly comprises two first electric telescopic rods fixedly connected to the top of the inner side of the shell, and the extension ends of the two first electric telescopic rods are fixedly connected to the top of the lifting plate.

Preferably, the adjusting part includes that annular array sets up eight hold up tanks in the rotor plate bottom, installs at the inboard mounting panel of hold up tank, sets up at the inside cavity of rotor plate, a plurality of second electric telescopic handle of rigid coupling in the cavity inboard and install and be used for driving rotor plate pivoted driving motor in the lifter plate top, and is a plurality of the extension end of second electric telescopic handle is equallyd divide and is do not extended to the inboard of eight hold up tanks and with the top rigid coupling of mounting panel, eight the abrasive brick all passes through bolt and mounting panel rigid coupling.

Preferably, the link gear includes that set up at a plurality of mounting holes that operation panel both sides outer wall and standing groove correspond the setting, slide and set up at the inboard transfer line of mounting hole, set up at two tooth's sockets at transfer line top, the gear of meshing installation at the tooth's socket is inboard, the bottom of transmission shaft extends to the inboard of mounting hole and the top center rigid coupling of gear, the second spring is installed to the one end that the transfer line is located the mounting hole inboard, the other end of transfer line extends to the outside of mounting hole, the link gear still includes the bottom plate of rigid coupling at casing both sides inner wall, installs the driving plate below the bottom plate, installs two spliced poles at the driving plate top, the adapter sleeve at spliced pole outside top is established to the movable sleeve, four the top of adapter sleeve and the bottom rigid coupling of lifter plate, and the third spring is all installed to the inboard of four adapter sleeves, and the bottom of four spliced poles all extend to the bottom of bottom plate, And the transmission plates are fixedly connected with the tops of the two transmission plates respectively, and the transmission plates are mutually abutted with one sides of the transmission rods, which are close to each other.

Preferably, the side of the transmission rod close to the transmission plate is a smooth inclined surface.

Preferably, two the equal rigid coupling in bottom of bottom plate has a plurality of extension springs, and is a plurality of the bottom of extension spring is respectively with the top rigid coupling of two driving plates.

Preferably, a plurality of the clamping blocks are respectively movably sleeved with a first spring outside the end far away from the cam.

Preferably, a plurality of dust removal through-holes are opened at the top of the operating panel, a dust collection funnel is fixedly connected to the bottom of the operating panel, and a dust collector is installed at the bottom of the dust collection funnel.

Preferably, the bottom rigid coupling of rotor plate has eight cleaning brushes, and eight cleaning brushes and eight grinding block alternate distribution, and two liang of cooperations of eight cleaning brushes form four and grind the grade.

Preferably, an operation door is installed on the outer portion of one side of the front face of the shell, and a PLC is installed on the outer wall of one side of the shell.

The invention has the beneficial effects that:

1. mutually support through operation panel, standing groove, joint piece, transfer line, gear, cam etc. conveniently carries out the centre gripping with a plurality of brake blocks of treating grinding fixed, realizes grinding a plurality of brake blocks simultaneously, has effectively improved the grinding efficiency of brake block.

2. Through mutually supporting such as carousel, hold up tank, mounting panel, grinding piece, second electric telescopic handle, brush, dust catcher, dust removal through-hole, the realization carries out the grinding of four different precisions to the brake block, conveniently selects the grinding piece of different grinding precision according to the grinding condition to can in time brush from the brake block with the piece that grinds the production and wash, and collect the piece that produces to grinding, avoid the piece to cause secondary damage to the brake block.

3. Through mutually supporting such as guide cylinder, guide bar, bottom plate, head rod, second connecting rod, push rod, driving plate, the realization is before grinding the brake block, guarantees to place the brake block at the operation panel top can be by the centre gripping tightly, avoids not hard up at the grinding process brake block, guarantees to grind the effect.

The grinding device is reasonable in structure, stable in structure and simple in operation, not only can be used for grinding the brake pads at multiple levels of precision, but also can be used for fixing the brake pads simultaneously, the brake pads can be clamped before being ground, and after the grinding is finished, the clamping is automatically released, so that the grinding labor intensity is effectively reduced, the grinding efficiency is improved, and the grinding device is easy to popularize and use.

Drawings

Fig. 1 is a front cross-sectional view of the present invention.

Fig. 2 is an enlarged view of the invention at a in fig. 1.

Fig. 3 is a schematic bottom view of the polishing disk of the present invention.

Fig. 4 is a schematic structural view of the cam of the present invention.

FIG. 5 is a schematic view of the structure of the transmission rod and the gear of the present invention

Fig. 6 is a schematic front view of the present invention.

Reference numbers in the figures: 1. a housing; 2. an operating door; 3. a PLC controller; 4. an operation panel; 5. a placement groove; 6. a dust removal through hole; 7. an installation port; 8. a clamping block; 9. a first spring; 10. mounting holes; 11. a transmission rod; 12. a tooth socket; 13. a gear; 14. a drive shaft; 15. a cam; 16. a second spring; 17. a dust collection funnel; 18. a dust collector; 19. a first electric telescopic rod; 20. a lifting plate; 21. a movable plate; 22. a drive motor; 23. a storage tank; 24. mounting a plate; 25. grinding blocks; 26. a cavity; 27. a second electric telescopic rod; 28. a base plate; 29. connecting sleeves; 30. a third spring; 31. connecting columns; 32. cleaning a brush; 33. a tension spring; 34. a drive plate.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments.

Referring to fig. 1 to 6, a graded grinding device for machining an automobile brake pad includes: casing 1, casing 1's front one side externally mounted has operation door 2, PLC controller 3 is installed to one side outer wall of casing 1, there is operation panel 4 at casing 1's inboard rigid coupling, operation panel 4 level sets up, a plurality of standing grooves 5 have been seted up to operation panel 4's top array, standing groove 5's appearance is similar with the shape of brake block, when grinding the brake block, place the brake block in standing groove 5's inboard, it needs the face up that grinds to keep the brake block, installing port 7 has all been seted up at the both sides inner wall of a plurality of standing grooves 5, install joint piece 8 in installing port 7 inboard, the outside all movable sleeve of one end that cam 15 was kept away from to a plurality of joint pieces 8 is equipped with first spring 9, under first spring 9's spring action, joint piece 8 has the trend of the inboard motion of installing port 7 all the time.

A transmission shaft 14 rotatably connected with the top of the inner side of the mounting opening 7, a cam 15 fixedly sleeved outside the transmission shaft 14, wherein the cam 15 is positioned at one end of the clamping block 8 far away from the placing groove 5 and is abutted against the outer wall of the clamping block 8, a plurality of mounting holes 10 corresponding to the placing groove 5 are formed in the outer walls of the two sides of the operating plate 4, a transmission rod 11 is slidably arranged in each mounting hole 10, two tooth sockets 12 are formed in the top of the transmission rod 11, gears 13 are respectively installed on the inner sides of the two tooth sockets 12 in a meshed manner, the bottom of the transmission shaft 14 extends to the inner side of the mounting hole 10 and is fixedly connected with the top center of the gear 13, a second spring 16 is installed at one end of the transmission rod 11 positioned in the inner side of the mounting hole 10, the transmission rod 11 is pushed towards the inner side of the mounting hole 10 to drive the two gears 13 to simultaneously rotate in opposite directions, and further drive the protruding parts of the two cams 15 to approach the clamping block 8, the clamping block 8 is pushed out of the inner side of the placing groove 5, the first spring 9 is compressed to store energy, and the brake pad on the inner side of the placing groove 5 is abutted and clamped tightly.

Two first electric telescopic rods 19 are fixedly connected to the top of the inner side of the shell 1, lifting plates 20 are fixedly connected to the extension ends of the two first electric telescopic rods 19, rotating plates 21 are rotatably connected to the bottoms of the lifting plates 20, driving motors 22 for driving the rotating plates 21 to rotate are mounted on the tops of the lifting plates 20, eight storage tanks 23 are arranged at the bottoms of the rotating plates 21 in an annular array mode, the eight storage tanks 23 are all arranged along the radial direction of the rotating plates 21, cavities 26 are formed in the rotating plates 21, the cavities 26 are located at the tops of the eight storage tanks 23, mounting plates 24 are arranged at the tops of the inner sides of the eight storage tanks 23, a plurality of second electric telescopic rods 27 are fixedly connected to the bottoms of the inner sides of the cavities 26, the extension ends of the plurality of second electric telescopic rods 27 are respectively extended to the inner sides of the eight storage tanks 23 and are fixedly connected to the tops of the mounting plates 24, grinding blocks 25 are fixedly connected to the bottoms of the eight mounting plates 24 through bolts, wherein two liang of cooperations of two grinding piece 25 that eight grinding piece 25 are on same axis form four and grind the grade according to the thickness degree of grinding piece 25, and a plurality of second electric telescopic handle 27 mutually support with PLC controller 3, only two grinding piece 25 that are on same axis descend the below of rotor plate 21 in the grinding process.

The top of the operation board 4 is provided with a plurality of dust removal through holes 6, the bottom of the operation board 4 is fixedly connected with a dust collection funnel 17, the bottom of the dust collection funnel 17 is provided with a dust collector 18, the bottom of the rotating board 21 is fixedly connected with eight cleaning brushes 32, the eight cleaning brushes 32 and the eight grinding blocks 25 are alternately distributed, in the process of grinding the brake pad, the rotating board 21 rotates to drive the two grinding blocks 25 with the same thickness grade to rotate, burrs on the brake pad are ground, grinding debris generated in the grinding process is brushed to the top of the operation board 4 by the eight cleaning brushes 32 rotating along with the rotating board 21 to prevent the grinding debris from remaining on the brake pad and influencing the grinding quality, the grinding debris dropped on the top of the operation board 4 is attracted by the strong attraction of the dust collector 18 to enter the dust collection funnel 17 from the dust collection through holes 6, then enters the inner side of the dust collector 18 through the dust collection funnel 17, and is convenient for collecting the debris generated in the grinding process, the chips generated by grinding are prevented from flying around to pollute the environment.

The inner walls of two sides of the shell 1 are fixedly connected with bottom plates 28, transmission plates 34 are arranged below the two bottom plates 28, a plurality of tension springs 33 are arranged between the transmission plates 34 and the bottom plates 28, the bottoms of the tension springs 33 are fixedly connected with the bottoms of the transmission plates 34, the tops of the tension springs 33 are fixedly connected with the bottoms of the bottom plates 28, one end of each transmission plate 34 close to a transmission rod 11 is abutted against one end of the transmission rod 11 outside an installation hole 10, one sides of the transmission rod 11 close to the transmission plates 34 are smooth inclined planes, two connecting columns 31 are fixedly connected with the tops of the two transmission plates 34 respectively, the tops of the four connecting columns 31 extend to the tops of the bottom plates 28, connecting sleeves 29 are movably sleeved on the tops of the four connecting columns 31, the tops of the connecting sleeves 29 are fixedly connected with the bottoms of the lifting plates 20, third springs 30 are arranged on the inner sides of the connecting sleeves 29, and the elastic coefficients of the third springs 30 are larger than the elastic coefficients of the tension springs 33, when the lifting plate 20 descends, the connecting column 31 is pushed vertically downwards to drive the transmission plate 34 to move vertically downwards, the transmission rod 11 is further pushed towards the inner side of the mounting hole 10 along the horizontal direction to drive the cams 15 to rotate, the clamping block 8 is pushed out of the mounting hole 7 to clamp a brake pad to be ground, at the moment, the first spring 9 and the second spring 16 are both in a compression energy storage state, the tension spring 33 is stretched to store energy, the lifting plate 20 descends continuously, the third spring 30 is compressed to ensure that the grinding block 25 can be attached to the top of the brake pad, the lifting plate 20 ascends, the third spring 30 recovers deformation firstly, when the lifting plate 20 ascends to a certain height, the lifting plate 20 ascends continuously, under the combined action of the tension spring 33 of the tension of the connecting column 31, the transmission plate 34 ascends, after the transmission rod 11 loses external extrusion, under the elastic action of the second spring 16, the transfer line 11 drives a plurality of cams 15 to rotate to the outside motion of mounting hole 10 for the joint piece 8 is kept away from to the protruding position of cam 15, and joint piece 8 loses external support, and under the elastic action of first spring 9, joint piece 8 removes the centre gripping to the brake block to the inboard motion of installing port 7, conveniently takes the brake block that grinds the completion.

The working principle is as follows: when the brake pad is ground, the operation door 2 is opened, the brake pad to be ground is placed on the inner side of the placing groove 5, the surface of the brake pad to be ground faces upwards, then the operation door 2 is closed, the power supply of the equipment is connected, the PLC 3 is operated, two grinding blocks 25 with proper thickness are selected according to the grade of the brake pad to be ground, then the second electric telescopic rods 27 fixedly connected with the corresponding two grinding blocks 25 extend synchronously, the two selected grinding blocks 25 are pushed out to the lower part of the storage groove 23, then the two first electric telescopic rods 19 extend synchronously to push the lifting plate 20 to descend, in the descending process of the lifting plate 20, the four connecting posts 31 installed at the bottom of the lifting plate 20 vertically descend to drive the two transmission plates 34 to vertically move downwards, and further the transmission rods 11 are pushed towards the inner side of the mounting hole 10 along the horizontal direction to drive the cams 15 to rotate, the clamping blocks 8 are pushed out of the mounting opening 7, the brake pad to be ground placed on the inner side of the placing groove 5 is clamped tightly, the lifting plate 20 continuously descends, the third spring 30 is compressed until the bottom of the grinding block 25 is abutted to the bottom of the brake pad to be ground, the driving motor 22 drives the rotating plate 21 to rotate, the two grinding blocks 25 with the same thickness grade are driven to rotate, burrs on the brake pad are ground, grinding debris generated in the grinding process is brushed down to the top of the operating plate 4 by the eight cleaning brushes 32 rotating along with the rotating plate 21, the grinding debris is attracted by the dust collector 18 from the dust removal through hole 6 to enter the dust collection funnel 17 and enters the inner side of the dust collector 18, the debris generated in the grinding process is collected, when the brake pad needs to be ground at the next grade, only the PLC is required to be operated, the two grinding blocks 25 required later are selected, then the second electric telescopic rod 27 fixedly connected with the top of the previous two grinding blocks 25 is contracted, the grinding blocks 25 move to the inner side of the storage tank 23, the second electric telescopic rod 27 fixedly connected with the two grinding blocks 25 to be used later is slowly extended until the two grinding blocks 25 completely move to the bottom of the rotating plate 21, and the brake pad is ground, after the grinding work is finished, the plurality of second electric telescopic rods 27 are contracted, the grinding blocks 25 move to the inner side of the storage tank 23, the driving motor 22 stops working, the two first electric telescopic rods 19 are contracted, the lifting plate 20 descends, under the elastic action of the plurality of first springs 9, the plurality of second springs 16 and the plurality of tension springs 33, the plurality of clamping blocks 8 move to the inner side of the mounting port 7, the clamping of the plurality of brake pads is released, the operation door 2 is opened, the brake pads placed on the operation plate 4 can be conveniently taken, and when the brake pad is used next time, repeating the above steps.

In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", and the like, indicate orientations and positional relationships based on those shown in the drawings, and are used only for convenience of description and simplicity of description, and do not indicate or imply that the equipment or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be considered as limiting the present invention.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless specifically defined otherwise.

The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be considered to be within the technical scope of the present invention, and the technical solutions and the inventive concepts thereof according to the present invention should be equivalent or changed within the scope of the present invention.