阅读说明：本技术 一种具有自动冷却功能的方便清洁的拉丝机 (Convenient clear wire drawing machine with automatically cooling function ) 是由 丁大军 丁冠军 自明春 于 2021-09-14 设计创作，主要内容包括：本发明公开了一种具有自动冷却功能的方便清洁的拉丝机,包括拉丝机工作台、挤压箱、伸缩气缸、进料斗、出料口、冷却机构、传送带和驱动电机,所述拉丝机工作台底部固定连接有支撑腿,所述挤压箱设置在拉丝机工作台上方,所述活塞杆通过通孔贯穿挤压箱与挤压板固定连接,且通孔内部设有密封垫,所述进料斗设置在挤压箱上方,所述出料口设置在挤压箱另一侧,所述冷却机构设置在出料口一侧,所述传送带设置在除尘机构下方,所述驱动电机通过电机轴带动皮带传动结构和传送滚筒转动。该具有自动冷却功能的方便清洁的拉丝机,设置有冷却机构和除尘机构,冷却机构便于对拉丝后的物料进行冷却处理,除尘机构能够有效除去附着在拉丝物料表面的灰尘。(The invention discloses a wire drawing machine with an automatic cooling function and convenient to clean, which comprises a wire drawing machine workbench, an extrusion box, a telescopic cylinder, a feeding hopper, a discharging port, a cooling mechanism, a conveying belt and a driving motor, wherein the bottom of the wire drawing machine workbench is fixedly connected with a supporting leg, the extrusion box is arranged above the wire drawing machine workbench, a piston rod penetrates through the extrusion box through a through hole and is fixedly connected with an extrusion plate, a sealing gasket is arranged inside the through hole, the feeding hopper is arranged above the extrusion box, the discharging port is arranged on the other side of the extrusion box, the cooling mechanism is arranged on one side of the discharging port, the conveying belt is arranged below a dust removal mechanism, and the driving motor drives a belt transmission structure and a conveying roller to rotate through a motor shaft. This convenient clear wire drawing machine with automatically cooling function is provided with cooling body and dust removal mechanism, and cooling body is convenient for carry out cooling treatment to the material after the wire drawing, and dust removal mechanism can effectively detach the dust attached to wire drawing material surface.)

1. The utility model provides a convenient clear wire drawing machine with automatically cooling function, includes wire drawing machine workstation (1), extrusion case (4), telescopic cylinder (10), feeder hopper (14), discharge gate (16), cooling body (19), conveyer belt (22) and driving motor (25), its characterized in that: the bottom of the wire drawing machine workbench (1) is fixedly connected with a supporting leg (2), the bottom of the supporting leg (2) is provided with an anti-skidding foot pad (3), the extrusion box (4) is arranged above the wire drawing machine workbench (1), one side of the extrusion box (4) is rotatably connected with the cleaning door (6) through a hinge (5), the cleaning door (6) is provided with a transparent observation window (7), the telescopic cylinder (10) is arranged on one side of the extrusion box (4) through a mounting frame (11), the telescopic cylinder (10) is connected with the piston rod (9), the piston rod (9) penetrates through the extrusion box (4) through a through hole (12) and is fixedly connected with the extrusion plate (8), a sealing gasket (13) is arranged inside the through hole (12), the feeding hopper (14) is arranged above the extrusion box (4), the top end of the feeding hopper (14) is provided with a sealing cover (15), the discharge port (16) is arranged on the other side of the extrusion box (4), and discharge gate (16) inside is equipped with draws silk screen (17), draws silk screen (17) simultaneously and installs inside discharge gate (16) through installation frame (18), cooling body (19) set up in discharge gate (16) one side, and the cooling body (19) outside is equipped with control panel (20), and cooling body (19) opposite side is equipped with dust removal mechanism (21) simultaneously, conveyer belt (22) set up in dust removal mechanism (21) below, and conveyer belt (22) inside is equipped with conveying roller (23), driving motor (25) drive belt transmission structure (24) and conveying roller (23) through the motor shaft and rotate.

2. The easy-to-clean wire drawing machine with automatic cooling function according to claim 1, characterized in that: cooling body (19) include cooler bin (1901), motor protecting sheathing (1902), motor (1903), cooling fan (1904), cooling plate (1905), temperature sensor (1906) and ventilation hole (1907), inside motor protecting sheathing (1902) that is equipped with of cooler bin (1901), and inside motor (1903) that is equipped with of motor protecting sheathing (1902), motor (1903) drive cooling fan (1904) through the motor shaft and rotate simultaneously, cooling plate (1905) set up in cooling fan (1904) both sides, and cooling plate (1905) top is equipped with ventilation hole (1907), temperature sensor (1906) set up in cooler bin (1901) inside one side.

3. The easy-to-clean wire drawing machine with automatic cooling function according to claim 1, characterized in that: the dust removal mechanism (21) comprises a dust removal fan (2101), a dust collection pipe (2102), a dust collection cover (2103), a dust outlet pipe (2104), a dust collection box (2105) and a bottom plate (2106), one end of the dust removal fan (2101) is fixedly connected with the dust collection cover (2103) through the dust collection pipe (2102), the other end of the dust removal fan (2101) is connected with the dust collection box (2105) through the dust outlet pipe (2104), and the bottom of the dust collection box (2105) is provided with the bottom plate (2106).

4. The easy-to-clean wire drawing machine with automatic cooling function according to claim 2, characterized in that: the motor (1903) and the cooling fan (1904) form a rotating mechanism, and the rotating mechanism rotates within the range of 0-360 degrees.

5. The easy-to-clean wire drawing machine with automatic cooling function according to claim 1, characterized in that: the extrusion box (4), the hinge (5) and the cleaning door (6) form a rotating mechanism, and the rotating angle range of the rotating mechanism is 0-90 degrees.

6. The easy-to-clean wire drawing machine with automatic cooling function according to claim 1, characterized in that: the size of the cleaning door (6) is larger than that of the transparent observation window (7).

7. The easy-to-clean wire drawing machine with automatic cooling function according to claim 1, characterized in that: the telescopic cylinder (10), the piston rod (9) and the extrusion plate (8) form a telescopic mechanism, and the telescopic distance of the telescopic mechanism is smaller than the length of the workbench (1) of the wire drawing machine.

8. The easy-to-clean wire drawing machine with automatic cooling function according to claim 1, characterized in that: seven conveying rollers (23) are arranged, and the conveying rollers (23) are uniformly distributed in the conveying belt (22).

9. The easy-to-clean wire drawing machine with automatic cooling function according to claim 1, characterized in that: the driving motor (25), the belt transmission structure (24), the conveying roller (23) and the conveying belt (22) form a rotating mechanism, and the rotating angle range of the rotating mechanism is 0-360 degrees.

Technical Field

The invention relates to the technical field of wire drawing machines, in particular to a wire drawing machine with an automatic cooling function and convenient cleaning.

Background

The wire drawing machines can be classified into metal wire drawing machines (used for preprocessing metal products such as standard parts) and plastic wire drawing machines (used for special complete equipment for deep processing of various hollow and solid round wires or flat wires produced by using polyester, nylon, polyethylene, polypropylene, polyester chips and the like as raw materials in the plastic product industry), bamboo and wood wire drawing machines (used for special equipment for drawing out bamboo wires and reprocessing wood wires for manufacturing chopsticks, toothpicks, barbecue sticks and the like in the bamboo and wood product industry) and the like according to the purposes. The metal wire drawing machine belongs to the production and preprocessing equipment of metal products such as standard parts and the like, and aims to draw wires or rods which are produced and transported to metal product production enterprises such as standard parts and the like by steel manufacturers through the wire drawing machine, so that the diameters, the roundness, the internal metallographic structure, the surface finish and the straightness of the wires or rods meet the raw material processing requirements required by the production of the metal products such as the standard parts and the like. Therefore, the pretreatment quality of the wire or the bar by the wire drawing machine is directly related to the product quality of metal product production enterprises such as standard parts and the like. The wire drawing machine belongs to the metal wire drawing machine in the metal product equipment industry, and is widely applied to production and preprocessing treatment of metal products such as steel wires, rope making wires, prestressed steel wires, standard parts and the like. The current wire drawing machine cleaning effect is relatively poor, the wire drawing machine can produce a large amount of waste materials at the during operation, rubbish such as dust, pile up in the wire drawing machine for a long time, can influence the normal work of wire drawing machine, serious can cause the wire drawing machine to damage, and current wire drawing machine cooling effect is not good, the not good material wire drawing quality that can influence of wire drawing machine cooling effect, also can influence staff's operation and wire drawing machine's life, produce the trouble easily, and current wire drawing machine wire drawing effect is relatively poor, the wire drawing machine is when carrying out the wire drawing to the material, the not good work efficiency that can influence of wire drawing effect, and current wire drawing machine practicality is lower, the wire drawing machine does not possess dust removal function, some dusts can be adhered to at the wire drawing rear surface to the material, the clearance is more troublesome, waste time and energy.

Disclosure of Invention

The invention aims to provide a wire drawing machine with an automatic cooling function and convenient cleaning, and aims to solve the problems that the existing wire drawing machine in the background art is poor in cleaning effect, poor in cooling effect, poor in wire drawing effect and low in practicability.

In order to achieve the purpose, the invention provides the following technical scheme: a wire drawing machine with an automatic cooling function and convenient cleaning comprises a wire drawing machine workbench, an extrusion box, a telescopic cylinder, a feed hopper, a discharge port, a cooling mechanism, a conveyor belt and a driving motor, wherein the bottom of the wire drawing machine workbench is fixedly connected with a supporting leg, the bottom of the supporting leg is provided with an anti-skidding foot pad, the extrusion box is arranged above the wire drawing machine workbench, one side of the extrusion box is rotatably connected with a cleaning door through a hinge, a transparent observation window is arranged on the cleaning door, the telescopic cylinder is arranged on one side of the extrusion box through a mounting frame and is connected with a piston rod, the piston rod penetrates through the extrusion box through a through hole to be fixedly connected with an extrusion plate, a sealing gasket is arranged inside the through hole, the feed hopper is arranged above the extrusion box, the top end of the feed hopper is provided with a sealing cover, the discharge port is arranged on the other side of the extrusion box, and a wire drawing net is arranged inside the discharge port, simultaneously the wire drawing net passes through the installation frame and installs inside the discharge gate, cooling body sets up in discharge gate one side, and the cooling body outside is equipped with control panel, and the cooling body opposite side is equipped with dust removal mechanism simultaneously, the conveyer belt sets up in dust removal mechanism below, and the inside conveying cylinder that is equipped with of conveyer belt, driving motor passes through the motor shaft and drives belt transmission structure and conveying cylinder and rotate.

Through adopting above-mentioned technical scheme, the conveyer belt that is equipped with is convenient for carry the material after the wire drawing, and this kind of transport mode is comparatively simple, convenient to use.

Preferably, cooling body includes cooler bin, motor protecting sheathing, motor, cooling fan, cooling plate, temperature sensor and ventilation hole, the inside motor protecting sheathing that is equipped with of cooler bin, and the inside motor that is equipped with of motor protecting sheathing, the motor passes through the motor shaft simultaneously and drives cooling fan and rotate, the cooling plate sets up in cooling fan both sides, and is equipped with the ventilation hole above the cooling plate, temperature sensor sets up in the inside one side of cooler bin.

By adopting the technical scheme, the cooling mechanism is convenient for cooling the materials after wire drawing.

Preferably, the dust removing mechanism comprises a dust removing fan, a dust collecting pipe, a dust collecting cover, a dust outlet pipe, a dust collecting box and a bottom plate, one end of the dust removing fan is fixedly connected with the dust collecting cover through the dust collecting pipe, the other end of the dust removing fan is connected with the dust collecting box through the dust outlet pipe, and the bottom plate is arranged at the bottom of the dust collecting box.

Through adopting above-mentioned technical scheme, the dust removal mechanism work that is equipped with is convenient for clear up the dust that adheres to on wire drawing material surface.

Preferably, the motor and the cooling fan form a rotating mechanism, and the rotating mechanism rotates within a range of 0-360 degrees.

Through adopting above-mentioned technical scheme, the motor work that is equipped with drives cooling fan and rotates, is convenient for cool down the cooling to the material after the wire drawing.

Preferably, the extrusion box, the hinge and the cleaning door form a rotating mechanism, and the rotating angle of the rotating mechanism ranges from 0 degree to 90 degrees.

Through adopting above-mentioned technical scheme, the hinge that is equipped with rotates and is convenient for open the clearance door, conveniently clears up extrusion incasement portion.

Preferably, the size of the cleaning door is larger than that of the transparent observation window.

Through adopting above-mentioned technical scheme, the transparent observation window that is equipped with is convenient for observe the inside wire drawing condition of extrusion case.

Preferably, the telescopic cylinder, the piston rod and the extrusion plate form a telescopic mechanism, and the telescopic distance of the telescopic mechanism is smaller than the length of the workbench of the wire drawing machine.

Through adopting above-mentioned technical scheme, the telescopic cylinder that is equipped with drives the piston rod and is concertina movement to drive the stripper plate and be concertina movement, be convenient for extrude the wire drawing to the inside material of extrusion case.

Preferably, the conveying rollers are seven and are uniformly distributed inside the conveying belt.

Through adopting above-mentioned technical scheme, the conveying cylinder that is equipped with is convenient for the material after the conveyer belt is better carries the wire drawing.

Preferably, the driving motor, the belt transmission structure, the conveying roller and the conveying belt form a rotating mechanism, and the rotating angle range of the rotating mechanism is 0-360 degrees.

Through adopting above-mentioned technical scheme, the driving motor work that is equipped with drives the motor shaft and rotates to drive belt transmission structure, conveying cylinder and conveyer belt and rotate, be convenient for carry the material after the wire drawing.

Compared with the prior art, the invention has the beneficial effects that: the wire drawing machine with automatic cooling function and convenient cleaning,

(1) the cleaning door is rotatably connected with the extrusion box through a hinge, the cleaning door can be opened conveniently through the rotation of the hinge, waste materials in the extrusion box can be cleaned conveniently, the transparent observation window is arranged on the cleaning door, the wire drawing condition in the extrusion box and whether the interior of the extrusion box needs to be cleaned or not can be observed conveniently through the transparent observation window, the mode is simple, and the waste materials in the extrusion box can be cleaned conveniently;

(2) the cooling mechanism is convenient for cooling and processing the drawn materials, the motor shaft is driven by the cooling mechanism to rotate through the motor work so as to drive the cooling fan to rotate, the drawn materials are convenient for cooling and processing, the temperature sensor is convenient for monitoring the temperature in the cooling box in real time, and the drawn materials are convenient for cooling and processing better;

(3) the extrusion plate is convenient for drawing materials in the extrusion box, the telescopic cylinder drives the piston rod to do telescopic motion, so that the extrusion plate is driven to do telescopic motion, the materials in the extrusion box are convenient for extrusion and drawing, the wire drawing net is matched with the extrusion plate for use, the materials are convenient to better draw, the wire drawing mode is simple, and the wire drawing work efficiency is greatly improved;

(4) be provided with dust removal mechanism and dust cage, dust removal mechanism is convenient for remove dust to the material after the wire drawing through dust exhausting fan work, and dust exhausting fan work is convenient for collect the dust attached to wire drawing material surface through dust absorption pipe and dust cage to the dust of collecting is stored in the dust collecting tank through going out the dirt pipe, and this kind of dust removal mode is fairly simple, and dust removal effect is better, convenient to use.

Drawings

FIG. 1 is a schematic front view of the present invention;

FIG. 2 is a rear view of the present invention;

FIG. 3 is a schematic view of the internal structure of the present invention;

FIG. 4 is a schematic top view of the conveyor belt of the present invention;

FIG. 5 is a schematic view of the internal structure of the cooling mechanism of the present invention;

FIG. 6 is a schematic structural view of a dust removing mechanism according to the present invention;

FIG. 7 is an enlarged view of the structure at A in FIG. 3 according to the present invention.

In the figure: 1. wire drawing machine workstation, 2, supporting leg, 3, anti-skidding callus on the sole, 4, extrusion case, 5, hinge, 6, clearance door, 7, transparent observation window, 8, extrusion board, 9, piston rod, 10, telescopic cylinder, 11, mounting bracket, 12, through-hole, 13, sealed pad, 14, feeder hopper, 15, sealed lid, 16, discharge gate, 17, drawing wire net, 18, installation frame, 19, cooling body, 1901, cooling box, 1902, motor protective housing, 1903, motor, 1904, cooling fan, 1905, cooling board, 1906, temperature sensor, 1907, ventilation hole, 20, control panel, 21, dust removal mechanism, 2101, dust exhausting fan, 2102, dust absorption pipe, 2103, dust cage, 2104, play dirt pipe, 2105, dust collection box, 2102, bottom plate, 22, conveyer belt, 23, conveying cylinder, 24, belt transmission structure, 25, driving motor.

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. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Referring to fig. 1-7, the invention provides a wire drawing machine with an automatic cooling function and convenient to clean, as shown in fig. 1 and fig. 2, a supporting leg 2 is fixedly connected to the bottom of a workbench 1 of the wire drawing machine, an anti-skidding foot pad 3 is arranged at the bottom of the supporting leg 2, an extrusion box 4 is arranged above the workbench 1 of the wire drawing machine, one side of the extrusion box 4 is rotatably connected with a cleaning door 6 through a hinge 5, a transparent observation window 7 is arranged on the cleaning door 6, the extrusion box 4, the hinge 5 and the cleaning door 6 form a rotating mechanism, the rotating angle range of the rotating mechanism is 0-90 degrees, the cleaning door 6 can be opened conveniently through the rotation of the hinge 5, waste inside the extrusion box 4 can be cleaned conveniently, the mode is simple, the wire drawing machine can be cleaned conveniently, the size of the cleaning door 6 is larger than that of the transparent observation window 7, the observation effect of the transparent observation window 7 is good, and the wire drawing condition inside the extrusion box 4 and whether the waste inside the extrusion box 4 can be clearly seen through the transparent observation window 7 Needs to be cleaned, and the mode is simpler and is convenient to use.

As shown in fig. 3 and 7, telescopic cylinder 10 is installed on one side of extrusion box 4 through mounting bracket 11, and telescopic cylinder 10 is connected with piston rod 9, piston rod 9 runs through extrusion box 4 and 8 fixed connections of stripper plate through-hole 12, and through-hole 12 is inside to be equipped with sealed pad 13, telescopic cylinder 10, piston rod 9 and stripper plate 8 constitute telescopic machanism, and telescopic machanism telescopic distance is less than 1 length of wire drawing machine workstation, telescopic cylinder 10 drives piston rod 9 and does concertina movement, thereby drive stripper plate 8 and do concertina movement, be convenient for extrude the wire drawing to the material in extrusion box 4, this kind of wire drawing mode is simpler, the wire drawing effect is better, and convenient to use.

As shown in fig. 3, 5 and 6, the feeding hopper 14 is disposed above the extrusion box 4, the top end of the feeding hopper 14 is provided with a sealing cover 15, the discharge port 16 is disposed on the other side of the extrusion box 4, the wire drawing net 17 is disposed inside the discharge port 16, the wire drawing net 17 is mounted inside the discharge port 16 through the mounting frame 18, the cooling mechanism 19 is disposed on one side of the discharge port 16, the outer side of the cooling mechanism 19 is provided with a control panel 20, the other side of the cooling mechanism 19 is provided with a dust removing mechanism 21, the motor protecting housing 1902 is disposed inside the cooling box 1901, the motor 1903 is disposed inside the motor protecting housing 1902, the motor 1903 drives the cooling fan 1904 to rotate through the motor shaft, the cooling plates 1905 are disposed on two sides of the cooling fan 1904, the vent 1907 is disposed above the cooling plate 1905, the temperature sensor 1906 is disposed on one side inside the cooling box 1901, the cooling plate 1905 has a good cooling effect, and the cooling plate 1905 is convenient for cooling the material after wire drawing, through ventilation hole 1907 be convenient for discharge the inside heat of cooler bin 1901, motor 1903 and cooling fan 1904 constitute slewing mechanism, and slewing mechanism turned angle scope 0-360 degrees, motor 1903 work drives the motor shaft and rotates, thereby drive cooling fan 1904 and rotate, be convenient for cool down cooling treatment to the material after the wire drawing, this kind of cooling mode is comparatively simple, the cooling effect is better, and is convenient for use, dust removal fan 2101 one end is through dust absorption pipe 2102 and dust cage 2103 fixed connection, and the dust removal fan 2101 other end is connected with dust collection box 2105 through dust extraction pipe 2104, dust collection box 2105 bottom is equipped with bottom plate 2106 simultaneously, dust removal fan 2101 work is convenient for collect and is attached to wire drawing material surface dust through dust absorption pipe 2102 and dust cage 3, and store the dust of collecting in dust collection box 2105, this kind of cooling mode is simple, the dust removal effect is better, and convenient to use.

As shown in fig. 3 and 4, the conveyor belt 22 is disposed below the dust removing mechanism 21, and the conveyor belt 22 is internally provided with the conveyor rollers 23, the conveyor rollers 23 are provided with seven, the conveying rollers 23 are uniformly distributed in the conveying belt 22, the seven conveying rollers 23 are convenient for better driving the conveying belt 22 to rotate and conveying the materials after wire drawing, the mode is simple and convenient to use, the driving motor 25 drives the belt transmission structure 24 and the conveying roller 23 to rotate through the motor shaft, the driving motor 25, the belt transmission structure 24, the conveying roller 23 and the conveying belt 22 form a rotating mechanism, and the rotating angle range of the rotating mechanism is 0-360 degrees, the driving motor 25 works to drive the motor shaft to rotate so as to drive the belt transmission structure 24, the conveying roller 23 and the conveying belt 22 to rotate, the material after wire drawing is convenient to convey, and the conveying mode is simple and convenient to use.

The working principle is as follows: when the convenient-to-clean wire drawing machine with the automatic cooling function is used, the convenient-to-clean wire drawing machine with the automatic cooling function is moved to a wire drawing place, the sealing cover 15 is opened, a material to be drawn is poured into the extrusion box 4 through the feed hopper 14, the power supply is switched on, the telescopic cylinder 10 drives the piston rod 9 to do telescopic motion, so that the extrusion plate 8 is driven to do telescopic motion, the material in the extrusion box 4 is conveniently extruded and drawn, the extrusion plate 8 is matched with the discharge port 16 and the wire drawing net 17 for use, the material is conveniently drawn, the wire drawing mode is simple, the wire drawing effect is good, the wire drawing working efficiency is greatly improved, the wire drawing condition of the material in the extrusion box 4 can be conveniently and clearly seen through the transparent observation window 7, whether the waste material in the extrusion box 4 needs to be cleaned or not, the mode is simple and convenient to use, the material after wire drawing is conveyed to the cooling mechanism 19 and the dust removal mechanism 21 through the conveyor belt 22, the driving motor 25 works to drive the motor shaft to rotate, thereby driving the conveying roller 23, the belt transmission structure 24 and the conveyor belt 22 to rotate, thereby facilitating conveying of the materials after wire drawing, the cooling mechanism 19 works to facilitate cooling treatment of the materials after wire drawing, the motor 1903 is controlled to work through the control panel 20, the motor 1903 works to drive the motor shaft to rotate, thereby driving the cooling fan 1904 to rotate, thereby facilitating cooling of the materials after wire drawing, the cooling fan 1904 is used in cooperation with the cooling plate 1905 to greatly improve the cooling speed, the temperature sensor 1906 facilitates real-time monitoring of the internal temperature of the cooling box 1901, the cooling and cooling mode is simple, the cooling effect is good, the use is convenient, the cooling is finished, the conveyor belt 22 conveys the cooled materials to the dust removal mechanism 21, the dust removal fan 2101 works to facilitate collection of dust attached to the surface of the materials after wire drawing through the dust collection pipe 2102 and the dust collection cover 2103, and the collected dust is stored in the dust collection box 2105 through the dust outlet pipe 2104, the dust removal mode is simple, the dust removal effect is good, the use is convenient, the wire drawing is finished, the power supply is disconnected, the handle on the cleaning door 6 is pulled, the cleaning door 6 is opened through the rotation of the hinge 5, the waste inside the extrusion box 4 is conveniently cleaned, the mode is simple, the wire drawing machine is conveniently cleaned, and finally the wire drawing machine with the automatic cooling function and convenient to clean is moved away from a wire drawing place, so that the whole work is completed, and the content which is not described in detail in the description belongs to the existing technology known by professional technicians in the field.

The terms "central," "longitudinal," "lateral," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like are used in the orientation or positional relationship indicated in the drawings for simplicity of description only and are not intended to indicate or imply that the referenced devices or elements must be in a particular orientation, constructed and operative in a particular orientation, and are not to be considered limiting of the claimed invention.

Although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that various changes in the embodiments and/or modifications of the invention can be made, and equivalents and modifications of some features of the invention can be made without departing from the spirit and scope of the invention.