阅读说明：本技术 一种电动自行车用零部件打磨装置 (Electric bicycle is with spare part grinding device ) 是由 庞绍东 于 2020-04-26 设计创作，主要内容包括：本发明公开一种电动自行车用零部件打磨装置,包括固定底座、锁紧机构、打磨机构和减震机构,所述固定底座的下端面上设置有若干个支撑柱,所述固定底座的上端面上设置有安装箱,所述安装箱内部的下端面上设置有第一伺服电机,所述固定底座的上端面在安装箱的两侧均设置有固定杆,所述固定杆远离固定底座中间一侧的侧面上设置有PLC可编程控制器,所述PLC可编程控制器的输出端与第一伺服电机的输入端控制连接。本发明结构简单,操作便捷,设计合理,能够稳定地将电动自行车飞轮夹持,同时能够快速稳定地对电动自行车飞轮的两侧进行打磨,提高打磨效果和效率,不需要人工手动操作,并且有一定地减震效果,防止打磨出现偏差,降低残次品的概率。(The invention discloses a part polishing device for an electric bicycle, which comprises a fixed base, a locking mechanism, a polishing mechanism and a damping mechanism, wherein a plurality of support columns are arranged on the lower end face of the fixed base, an installation box is arranged on the upper end face of the fixed base, a first servo motor is arranged on the lower end face inside the installation box, fixing rods are arranged on two sides of the installation box on the upper end face of the fixed base, a PLC (programmable logic controller) is arranged on the side face of the fixing rod, which is far away from one side of the middle of the fixed base, and the output end of the PLC is in control connection with the input end of the first servo motor. The electric bicycle flywheel clamping device is simple in structure, convenient and fast to operate and reasonable in design, can stably clamp the electric bicycle flywheel, can quickly and stably polish two sides of the electric bicycle flywheel, improves polishing effect and efficiency, does not need manual operation, has a certain damping effect, prevents polishing deviation, and reduces the probability of defective products.)

1. The utility model provides a spare part grinding device for electric bicycle, includes unable adjustment base (1), locking mechanism (2), grinding machanism (3) and damper (4), its characterized in that: the fixing device is characterized in that a plurality of supporting columns (101) are arranged on the lower end face of the fixing base (1), an installation box (5) is arranged on the upper end face of the fixing base (1), a first servo motor (6) is arranged on the lower end face inside the installation box (5), fixing rods (7) are arranged on the upper end face of the fixing base (1) on two sides of the installation box (5), a PLC (programmable logic controller) (8) is arranged on the side face, away from one side of the middle of the fixing base (1), of each fixing rod (7), the output end of the PLC (8) is in control connection with the input end of the first servo motor (6), a fixing plate (9) is arranged on the upper end face of each fixing rod (7), connecting columns (10) are arranged on two sides of the lower end face of each fixing plate (9), a supporting plate (11) is arranged at the lower ends of the connecting columns (10), and the locking mechanism (2) is arranged on the installation box (5), grinding machanism (3) set up on the lower terminal surface of install bin (5) and backup pad (11), damper (4) set up the upper end at unable adjustment base (1).

2. The component grinding device for the electric bicycle according to claim 1, wherein: the locking mechanism (2) is composed of a plurality of transmission rods (21), a plurality of clamping blocks (22), fan-shaped clamping plates (23), adjusting bolts (24), limiting pieces (25) and locking bolts (26), the transmission rods (21) are arranged on the two sides of a first servo motor (6) on the upper end face of the installation box (5), the first servo motor (6) is in transmission connection with the transmission rods (21) through belt pulleys and belts, the plurality of clamping blocks (22) are arranged on the upper end of the installation box (5) on the transmission rods (21), the fan-shaped clamping plates (23) are connected on the clamping blocks (22) in a sliding mode, clamping grooves (231) are formed in one sides, far away from the circle center of the transmission rods (21), the adjusting bolts (24) are connected to the upper ends of the fan-shaped clamping plates (23) through threaded holes, the limiting pieces (25) are movably arranged at the lower ends of the adjusting bolts (24), the upper end of the transmission rod (21) is in threaded connection with a locking bolt (26) through a threaded hole, and the diameter of the upper end of the locking bolt (26) is smaller than that of the lower end of the locking bolt.

3. The component grinding device for the electric bicycle according to claim 1, wherein: the polishing mechanism (3) comprises a first electric telescopic rod (31), a first mounting plate (32), a first telescopic bracket (33), a second servo motor (34), a first screw rod (35), a first ball nut (36), a second electric telescopic rod (37), a second mounting plate (38), a second telescopic bracket (39), a third servo motor (301), a second screw rod (302), a second ball nut (303) and a plurality of tool bits (304), wherein the first electric telescopic rod (31) is arranged on the upper end surface of the mounting box (5), the first mounting plate (32) is arranged at the upper end of the first electric telescopic rod (31), the first telescopic brackets (33) are arranged on both sides of the lower end surface of the first mounting plate (32), the lower end of the first telescopic bracket (33) is arranged on the upper end surface of the mounting box (5), the second servo motor (34) is arranged on the upper end surface of the first mounting plate (32), the output end of the second servo motor (34) is connected with a first lead screw (35) in a transmission manner, the first lead screw (35) is connected with a first ball nut (36) in a threaded manner, a second electric telescopic rod (37) is arranged on the lower end face of the supporting plate (11), a second mounting plate (38) is arranged at the lower end of the second electric telescopic rod (37), second telescopic supports (39) are arranged on two sides of the lower end face of the second mounting plate (38), the lower end of each second telescopic support (39) is arranged on the lower end face of the supporting plate (11), a third servo motor (301) is arranged on the upper end face of the second mounting plate (38), the output end of the third servo motor (301) is connected with a second lead screw (302) in a transmission manner, nuts on two sides of the first lead screw (35) and the second lead screw (302) are arranged in a mirror image manner, the second ball nut (303) is connected with the second lead screw (302) in a threaded manner, the upper end of the first ball nut (36) and the lower end of the second ball nut (303) are both provided with a tool bit (304), and the PLC (8) is in control connection with the first electric telescopic rod (31), the second servo motor (34), the second electric telescopic rod (37) and the third servo motor (301).

4. The component grinding device for the electric bicycle according to claim 1, wherein: damper (4) comprise a plurality of first spring (41), a plurality of second spring (42) and a plurality of third spring (43), be provided with a plurality of first spring (41) on the up end of install bin (5), the upper end setting of first spring (41) is on the lower terminal surface of first mounting panel (32), be provided with a plurality of second spring (42) on the lower terminal surface of fixed plate (9), the lower extreme setting of second spring (42) is on backup pad (11), be provided with a plurality of third spring (43) on the lower terminal surface of backup pad (11), the lower extreme setting of third spring (43) is on the up end of second mounting panel (38).

5. The component grinding device for the electric bicycle according to claim 1, wherein: the lower end of the supporting column (101) is provided with a rubber antiskid block.

6. The component grinding device for the electric bicycle according to claim 1, wherein: the lower end in installation box (5) is provided with stiffener (12), the upper end of stiffener (12) is provided with beaded finish (13), the upper end setting of beaded finish (13) is on transfer line (21).

7. The component grinding device for the electric bicycle according to claim 1, wherein: the upper end of the fixing rod (7) is provided with a supporting rod (14), and the upper end of the supporting rod (14) is arranged on the lower end face of the supporting plate (11).

8. The component grinding device for the electric bicycle according to claim 2, wherein: the lower end of one side, close to the circle center of the transmission rod (21), of the fan-shaped clamping plate (23) is provided with an arc shape, and the position, at the same height as the fan-shaped clamping plate (23), of the locking bolt (26) is provided with the arc shape.

9. The component grinding device for the electric bicycle according to claim 2, wherein: and a fourth spring (15) is arranged on the upper end surface of the limiting piece (25) and outside the adjusting bolt (24), and the upper end of the fourth spring (15) is arranged on the fan-shaped clamping plate (23).

10. The component grinding device for the electric bicycle according to claim 3, wherein: and fifth springs (16) are arranged at the upper ends and the lower ends of the first telescopic bracket (33) and the second telescopic bracket (39).

Technical Field

The invention relates to the technical field of electric bicycle part machining equipment, in particular to a part polishing device for an electric bicycle.

Background

An electric bicycle is a mechatronic personal transportation tool which takes a storage battery as auxiliary energy and is provided with an operation component such as a motor, a controller, a storage battery, a rotating handle brake handle and the like and a display instrument system on the basis of a common bicycle, and comprises a charger, a battery, a controller, a rotating handle, a brake handle, a power-assisted sensor, a motor, a lamp, an instrument, a flywheel and other parts, wherein the flywheel needs to be polished during production, and the flywheel is difficult to effectively fix due to the small thickness of the flywheel and needs to be polished on two sides.

Disclosure of Invention

The invention aims to provide a part grinding device for an electric bicycle, which aims to solve the problems in the background technology.

In order to achieve the purpose, the invention provides the following technical scheme: a part polishing device for an electric bicycle comprises a fixed base, a locking mechanism, a polishing mechanism and a damping mechanism, wherein a plurality of support columns are arranged on the lower end face of the fixed base, an installation box is arranged on the upper end face of the fixed base, a first servo motor is arranged on the lower end face inside the installation box, fixing rods are arranged on the two sides of the installation box on the upper end face of the fixed base, a PLC (programmable logic controller) is arranged on the side face of the fixing rod away from the middle side of the fixed base, the output end of the PLC is in control connection with the input end of the first servo motor, a fixing plate is arranged on the upper end face of the fixing rod, connecting columns are arranged on the two sides of the lower end face of the fixing plate, a support plate is arranged at the lower end of each connecting column, the locking mechanism is arranged on the installation box, the polishing mechanism is arranged on the lower end faces of the installation box and the support plate, the damping mechanism is arranged at the upper end of the fixed base.

Preferably, the locking mechanism comprises a plurality of transmission rod, a plurality of clamping blocks, fan-shaped clamping plates, adjusting bolts, limiting pieces and locking bolts, the transmission rod is arranged on the two sides of the first servo motor on the upper end surface of the mounting box, the first servo motor is connected with the transmission rod through a belt pulley and a belt, the plurality of clamping blocks are arranged on the upper end of the mounting box, the fan-shaped clamping plates are connected to the clamping blocks in a sliding mode, a clamping groove is formed in one side, away from the circle center of the transmission rod, of each fan-shaped clamping plate, the adjusting bolts are connected to the upper ends of the clamping grooves through threaded holes, the limiting pieces are movably arranged at the lower ends of the adjusting bolts, the locking bolts are connected to the upper ends of the transmission rods through threaded holes, and the diameters of the upper ends of the locking bolts are small than the diameters of the lower ends of the locking bolts.

Preferably, the polishing mechanism comprises a first electric telescopic rod, a first mounting plate, a first telescopic bracket, a second servo motor, a first screw rod, a first ball nut, a second electric telescopic rod, a second mounting plate, a second telescopic bracket, a third servo motor, a second screw rod, a second ball nut and a plurality of tool bits, the upper end surface of the mounting box is provided with the first electric telescopic rod, the upper end of the first electric telescopic rod is provided with the first mounting plate, two sides of the lower end surface of the first mounting plate are provided with the first telescopic bracket, the lower end of the first telescopic bracket is arranged on the upper end surface of the mounting box, the upper end surface of the first mounting plate is provided with the second servo motor, the output end of the second servo motor is connected with the first screw rod in a transmission manner, the first screw rod is in threaded connection with the first ball nut, the lower end surface of the support plate is provided with the second electric telescopic rod, the lower extreme of second electric telescopic handle is provided with the second mounting panel, the both sides of terminal surface all are provided with the flexible support of second under the second mounting panel, the lower extreme setting of the flexible support of second is on the lower terminal surface of backup pad, be provided with third servo motor on the up end of second mounting panel, third servo motor's output transmission is connected with the second lead screw, the nut mirror image setting of first lead screw and second lead screw both sides, threaded connection second ball nut on the second lead screw, the upper end of first ball nut and second ball nut's lower extreme all are provided with the tool bit, PLC programmable controller and the equal control connection of first electric telescopic handle, second servo motor, second electric telescopic handle and third servo motor.

Preferably, damper comprises a plurality of first spring, a plurality of second spring and a plurality of third spring, be provided with the first spring of a plurality of on the up end of install bin, the upper end setting of first spring is on the lower terminal surface of first mounting panel, be provided with a plurality of second spring on the lower terminal surface of fixed plate, the lower extreme setting of second spring is in the backup pad, be provided with a plurality of third spring on the lower terminal surface of backup pad, the lower extreme setting of third spring is on the up end of second mounting panel.

Preferably, the lower end of the supporting column is provided with a rubber antiskid block.

Preferably, the lower end in the installation box is provided with a reinforcing rod, the upper end of the reinforcing rod is provided with a reinforcing ring, and the upper end of the reinforcing ring is arranged on the transmission rod.

Preferably, the upper end of the fixed rod is provided with a supporting rod, and the upper end of the supporting rod is arranged on the lower end face of the supporting plate.

Preferably, the lower end of the fan-shaped clamping plate, which is close to the circle center of the transmission rod, is provided with an arc, and the locking bolt and the fan-shaped clamping plate are arranged at the same height to form the arc.

Preferably, a fourth spring is arranged on the upper end face of the limiting piece and outside the adjusting bolt, and the upper end of the fourth spring is arranged on the fan-shaped clamping plate.

Preferably, the upper end and the lower end of the first telescopic support and the second telescopic support are both provided with a fifth spring.

Compared with the prior art, the invention has the beneficial effects that:

1. according to the invention, the locking mechanism is arranged on the installation box and consists of a plurality of transmission rods, a plurality of fixture blocks, a fan-shaped clamping plate, an adjusting bolt, a limiting piece and a locking bolt, the diameter of the upper end of the locking bolt is smaller than that of the lower end of the locking bolt, and the flywheel can be clamped quickly and stably under the action of the locking mechanism, so that the flywheel is prevented from deviating in the polishing process, and can be taken down quickly after polishing is completed;

2. according to the invention, the polishing mechanism is arranged on the lower end surfaces of the mounting box and the supporting plate, and consists of the first electric telescopic rod, the first mounting plate, the first telescopic bracket, the second servo motor, the first screw rod, the first ball nut, the second electric telescopic rod, the second mounting plate, the second telescopic bracket, the third servo motor, the second screw rod, the second ball nut and a plurality of tool bits, so that through the action of the polishing mechanism, two surfaces of the flywheel can be simultaneously and rapidly polished without being repeatedly polished, and the polishing efficiency and the polishing effect can be effectively improved;

3. according to the invention, the damping mechanism is arranged at the upper end of the fixed base and consists of the plurality of first springs, the plurality of second springs and the plurality of third springs, so that the vibration acting force generated in the polishing process can be reduced to a certain extent under the action of the damping mechanism, the deflection caused by overlarge vibration is prevented, and the polishing effect is improved.

Drawings

FIG. 1 is a front view of an electric bicycle component grinding apparatus;

FIG. 2 is a schematic view of an internal structure of a mounting case of a component polishing device for an electric bicycle;

FIG. 3 is a partial front view of a locking bolt of a component grinding device for an electric bicycle;

FIG. 4 is a schematic view of a fifth spring of the component polishing apparatus for an electric bicycle;

fig. 5 is an enlarged schematic view of a part grinding device for an electric bicycle shown in fig. 1.

In the figure: 1. a fixed base; 101. a support pillar; 2. a locking mechanism; 21. a transmission rod; 22. a clamping block; 23. a fan-shaped clamping plate; 231. a card slot; 24. adjusting the bolt; 25. a limiting sheet; 26. locking the bolt; 3. a polishing mechanism; 31. a first electric telescopic rod; 32. a first mounting plate; 33. a first telescopic bracket; 34. a second servo motor; 35. a first lead screw; 36. a first ball nut; 37. a second electric telescopic rod; 38. a second mounting plate; 39. a second telescopic bracket; 301. a third servo motor; 302. a second lead screw; 303. a second ball nut; 304. a cutter head; 4. a damping mechanism; 41. a first spring; 42. a second spring; 43. a third spring; 5. installing a box; 6. a first servo motor; 7. fixing the rod; 8. a PLC programmable controller; 9. a fixing plate; 10. connecting columns; 11. a support plate; 12. a reinforcing bar; 13. a reinforcement ring; 14. a support bar; 15. a fourth spring; 16. and a fifth spring.

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. 1-5, the present invention provides a technical solution: a part polishing device for an electric bicycle comprises a fixed base 1, a locking mechanism 2, a polishing mechanism 3 and a damping mechanism 4, wherein a plurality of support columns 101 are installed on the lower end face of the fixed base 1 through bolts, an installation box 5 is welded on the upper end face of the fixed base 1, a first servo motor 6 is installed on the lower end face inside the installation box 5 through bolts, fixed rods 7 are welded on two sides of the installation box 5 on the upper end face of the fixed base 1, a PLC (programmable logic controller) 8 is installed on the side face, away from the middle side of the fixed base 1, of each fixed rod 7 through bolts, the output end of the PLC 8 is in control connection with the input end of the first servo motor 6 through a lead, a fixed plate 9 is welded on the upper end face of each fixed rod 7, connecting columns 10 are welded on two sides of the lower end face of the fixed plate 9, a support plate 11 is welded at the lower ends of the connecting columns 10, the locking mechanism 2 is installed on the installation box 5, grinding mechanism 3 is installed on the lower terminal surface of install bin 5 and backup pad 11, and damper 4 installs the upper end at unable adjustment base 1.

In the invention, the locking mechanism 2 comprises a plurality of transmission rods 21, a plurality of fixture blocks 22 and a fan-shaped clamping plate 23, adjusting bolt 24, spacing piece 25 and locking bolt 26 constitute, transfer line 21 is all installed through the bearing in the both sides of first servo motor 6 to the up end of install bin 5, be connected through installation belt pulley and belt drive between first servo motor 6 and the transfer line 21, transfer line 21 has a plurality of fixture block 22 in the upper end welding of install bin 5, sliding connection has the fan-shaped cardboard 23 of a plurality of on the fixture block 22, draw-in groove 231 has been seted up to the one side of keeping away from the transfer line 21 centre of a circle on the fan-shaped cardboard 23, fan-shaped cardboard 23 has adjusting bolt 24 through seting up screw hole threaded connection in the upper end of draw-in groove 231, spacing piece 25 is installed through the bearing to adjusting bolt 24's lower extreme, the upper end of transfer line 21 has locking bolt 26 through seting up screw hole threaded connection, the diameter of the diameter ratio lower extreme of locking bolt 26 upper end is little.

In the invention, the polishing mechanism 3 comprises a first electric telescopic rod 31, a first mounting plate 32, a first telescopic bracket 33, a second servo motor 34, a first screw rod 35, a first ball nut 36, a second electric telescopic rod 37, a second mounting plate 38, a second telescopic bracket 39, a third servo motor 301, a second screw rod 302, a second ball nut 303 and a plurality of tool bits 304, the first electric telescopic rod 31 is arranged on the upper end surface of a mounting box 5 through a bolt, the first mounting plate 32 is arranged on the upper end of the first electric telescopic rod 31 through a bolt, the first telescopic bracket 33 is arranged on both sides of the lower end surface of the first mounting plate 32 through a portal frame, the lower end of the first telescopic bracket 33 is arranged on the upper end surface of the mounting box 5 through the portal frame, the second servo motor 34 is arranged on the upper end surface of the first mounting plate 32, the output end of the second servo motor 34 is connected with the first screw rod 35 through a gear transmission, the first ball nut 36 is connected with the first screw 35 in a threaded manner, the lower end face of the supporting plate 11 is provided with a second electric telescopic rod 37 through a bolt, the lower end of the second electric telescopic rod 37 is provided with a second mounting plate 38 through a bolt, two sides of the lower end face of the second mounting plate 38 are provided with second telescopic brackets 39 through a portal frame, the lower end of each second telescopic bracket 39 is arranged on the lower end face of the supporting plate 11 through the portal frame, the upper end face of the second mounting plate 38 is provided with a third servo motor 301 through a bolt, the output end of the third servo motor 301 is connected with a second screw 302 through gear transmission, nuts on two sides of the first screw 35 and the second screw 302 are distributed in a mirror image manner, the second screw 302 is connected with a second ball nut 303 in a threaded manner, the upper end of the first ball nut 36 and the lower end of the second ball nut 303 are welded with tool bits 304, and the PLC 8 and the first electric telescopic rod 31, The second servo motor 34, the second electric telescopic rod 37 and the third servo motor 301 are all connected in a control mode through conducting wires.

In the invention, the damping mechanism 4 consists of a plurality of first springs 41, a plurality of second springs 42 and a plurality of third springs 43, the plurality of first springs 41 are arranged on the upper end surface of the mounting box 5, the upper ends of the first springs 41 are arranged on the lower end surface of the first mounting plate 32, the plurality of second springs 42 are arranged on the lower end surface of the fixing plate 9, the lower ends of the second springs 42 are arranged on the supporting plate 11, the plurality of third springs 43 are arranged on the lower end surface of the supporting plate 11, and the lower ends of the third springs 43 are arranged on the upper end surface of the second mounting plate 38.

Preferably, the lower pot head of support column 101 is equipped with the rubber non slipping spur, is favorable to increasing the frictional force of support column 101 lower extreme.

Preferably, the reinforcing rod 12 is welded at the lower end inside the installation box 5, the reinforcing ring 13 is welded at the upper end of the reinforcing rod 12, and the upper end of the reinforcing ring 13 is sleeved on the transmission rod 21, so that the stability of the transmission rod 21 is improved.

Preferably, the upper end of the fixing rod 7 is welded with the supporting rod 14, and the upper end of the supporting rod 14 is welded on the lower end face of the supporting plate 11, which is beneficial to increasing the stability of the supporting plate 11.

Preferably, the lower end of the fan-shaped catch plate 23 close to the circle center of the transmission rod 21 is provided with an arc, and the same height of the locking bolt 26 and the fan-shaped catch plate 23 is provided with the arc, so that the locking bolt 26 can better prop the fan-shaped catch plate 23 open.

In the invention, the upper end surface of the limiting piece 25 is provided with the fourth spring 15 at the outer side of the adjusting bolt 24, and the upper end of the fourth spring 15 is arranged on the fan-shaped clamping plate 23, thereby being beneficial to increasing the stability of the limiting piece 25.

In the present invention, the fifth springs 16 are mounted at the upper and lower ends of the first and second telescopic brackets 33 and 39, which is beneficial to providing a certain elastic force to the first and second telescopic brackets 33 and 39.

The working principle is as follows: when the device is used, firstly, a flywheel to be polished is sleeved on the clamping groove 231, then the adjusting bolt 24 is rotated, the adjusting bolt 24 pushes the limiting piece 25 to move, the flywheel is clamped on the column, meanwhile, the locking bolt 26 is rotated upwards, the fan-shaped clamping plates 23 are jacked open towards two sides when the locking bolt 26 moves upwards, further, the flywheel is locked through the fan-shaped clamping plates 23, then the first servo motor 6, the first electric telescopic rod 31 and the second electric telescopic rod 37 are started through the PLC programmable controller 8, the first servo motor 6 drives the transmission rod 21 to move through a belt pulley and a belt, the transmission rod 21 drives the flywheel to rapidly rotate, the first electric telescopic rod 31 pushes the first mounting plate 32 upwards, the second electric telescopic rod 37 pushes the second mounting plate 38 downwards, after the tool bit 304 is contacted with the flywheel, the PLC programmable controller 8 controls the first electric telescopic rod 31 and the second electric telescopic rod 37 to stop moving, then the PLC programmable controller 8 controls the second servo motor 34 and the third servo motor 301 to move, the second servo motor 34 and the third servo motor 301 respectively drive the first screw rod 35 and the second screw rod 302 to rotate, the first ball nut 36 and the second ball nut 303 drive the tool bit 304 to move, and the side surfaces of the two sides of the fast rotating flywheel are polished, the device can fast and stably clamp the flywheel through the action of the locking mechanism 2, ensures that the flywheel does not deviate in the polishing process, can fast take down after the flywheel is polished, can simultaneously and fast polish the two surfaces of the flywheel through the action of the polishing mechanism 3, does not need to polish repeatedly, can effectively improve the polishing efficiency and the polishing effect, and can reduce the vibration acting force generated in the polishing process to a certain extent through the action of the damping mechanism 4, prevent to shake too big production skew, improve the effect of polishing.

It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.