阅读说明：本技术 一种环卫清扫装置 (Environmental sanitation cleaning device ) 是由 赵纪国 翟培明 张亚林 徐慧 支宇晗 于 2020-06-30 设计创作，主要内容包括：本发明涉及一种环卫清扫装置,包括清扫车车架,所述清扫车车架的前侧底部通过底部安装板安装有左右两处旋转式用于清扫路面上的清扫轮机构,所述清扫车车架的内部安装有方向盘旋转座,所述清扫车车架的左右两侧各安装有一套压架机构,所述清扫车车架的内腔面上焊接有前后两处第二导杆,第二导杆的顶端焊接有限位块,所述第二导杆上套装有第二复位弹簧,且两处第二导杆对称于方向盘旋转座的两侧,所述底部安装板的左右两端头均焊接有一根弯杆,所述电磁吸盘为左右两处,且两处所述的电磁吸盘上均安装有轴承,所述电磁吸盘通过轴承转动安装于弯杆上。(The invention relates to a sanitation cleaning device which comprises a sweeper frame, wherein a left rotating cleaning wheel mechanism and a right rotating cleaning wheel mechanism are arranged at the bottom of the front side of the sweeper frame through a bottom mounting plate, a direction spiral swivel base is arranged inside the sweeper frame, a set of pressure frame mechanisms are respectively arranged at the left side and the right side of the sweeper frame, a front second guide rod and a rear second guide rod are welded on the inner cavity surface of the sweeper frame, a limiting block is welded at the top end of each second guide rod, a second return spring is sleeved on each second guide rod, the two second guide rods are symmetrical to the two sides of the direction spiral swivel base, a bent rod is welded at each of the left end and the right end of the bottom mounting plate, each electromagnetic sucker is arranged at the left side and the right side, bearings are arranged on the two electromagnetic suckers, and the electromagnetic suckers are rotatably.)

1. The utility model provides a sanitation cleaning device, includes sweeper truck frame (1), steps on pressure groove (101), pressure frame mechanism (2), welds board (201), pressure groove (202), first guide bar (203), first reset spring (204), otic placode (205), side guard plate (3), wheel cabin (301), rubber wheel (302), guide rail groove (303), side link (4), step on board (401), second guide arm (5), stopper (501), direction spiral swivel mount (6), second reset spring (7), bottom mounting panel (8), cleaning wheel mechanism (9), knee (10), electromagnetic chuck (11), side tooth (1101) and bearing (1102), two places rotation type cleaning wheel mechanism (9) that are used for cleaning on the sweeper truck frame road surface about the front side bottom of sweeper truck frame (1) is installed through bottom mounting panel (8), the internally mounted of sweeper truck frame (1) has direction spiral swivel mount (6), the method is characterized in that:

the left side and the right side of the sweeper frame (1) are respectively provided with a set of pressing frame mechanism (2), the inner cavity surface of the sweeper frame (1) is welded with a front second guide rod and a rear second guide rod (5), the top end of the second guide rod (5) is welded with a limiting block (501), the second guide rod (5) is sleeved with a second reset spring (7), the two second guide rods (5) are symmetrical to the two sides of a direction spiral rotating seat (6), the left end and the right end of a bottom mounting plate (8) are both welded with a bent rod (10), the electromagnetic chucks (11) are arranged at the left position and the right position, bearings (1102) are respectively arranged on the two electromagnetic chucks (11), and the electromagnetic chucks (11) are rotatably arranged on the bent rods (10) through the bearings (1102);

the pressure frame mechanism (2) is including welding in welding board (201) outside of sweeper frame (1), offer in the indent (202) that welds board (201) front side, weld in first guide bar (203) in indent (202), suit in first reset spring (204) in first guide bar (203) outside, sliding sleeve adorns otic placode (205) on first guide bar (203), and the outer end head welding of otic placode (205) has side guard plate (3), guide rail groove (303) that side guard plate (3) were seted up through the internal surface, sliding fit is overhead in welding board (201) outer end, there are side connecting rod (4) front side top surface through bolted connection of side guard plate (3).

2. A sanitation sweeping device according to claim 1, wherein each inner end surface of the side link (4) is welded with a pedal (401), and a non-slip mat is mounted on the top surface of the pedal (401).

3. A device as claimed in claim 1, wherein two treading grooves (101) are formed on the bottom surface of the sweeper frame (1), and the treading grooves (101) are located on the bottom side of the treading plate (401).

4. A sanitation sweeping device according to claim 1, wherein said second return spring (7) is located directly under the side link (4).

5. A sanitation sweeping device according to claim 1, wherein a wheel chamber (301) is welded to the bottom outer side of the side guard plate (3), and a row of rubber wheels (302) is installed in the bottom cavity of the wheel chamber (301).

6. A sanitation sweeping device according to claim 1, wherein the electromagnetic chuck (11) is located on the inner side of the skirt (3) such that the electromagnetic chuck (11) is covered when the skirt (3) is moved downwardly.

7. A sanitation cleaning device according to claim 1, wherein said electromagnetic suction cup (11) is a disc-shaped electromagnet, and both said electromagnetic suction cups (11) are located at the outer side of the cleaning wheel mechanism (9) in an inwardly inclined manner.

8. A sanitation cleaning device according to claim 1, wherein a ring of side teeth (1101) are welded on the outer contour surface of said electromagnetic chuck (11).

9. A sanitary cleaning device according to claim 8, characterised in that said toothing (1101) is interposed between nylon brush bars of the cleaning wheel mechanism (9).

10. The inner end of the side connecting rod (4) is in sliding fit with the second guide rod (5) in a mode of forming a circular through hole.

Technical Field

The invention relates to the technical field of highway sanitation sweeper, in particular to a sanitation sweeping device.

Background

A Sanitation vehicle (Sanitation vehicle) is a special vehicle for cleaning and tidying urban contents, mainly comprises a sprinkler system and a garbage vehicle system, and also comprises a sweeper for sweeping road dust and garbage, wherein the bottom of the sweeper is provided with a left sweeping seat and a right sweeping seat or two groups of sweeping seats by adopting a sensing or electric mechanism, the sweeper travels on the road, the sweeping seats rotate, and the dust or garbage swept in the rotating process is guided into a collecting cabin at the bottom.

However, when the sweeping wheel at the bottom of the sweeper is used for sweeping road dust, a large amount of dust smoke or dust can fly outwards to pollute the surrounding environment, and troubles can be caused to pedestrians on a pavement at the side of the road, so that when the sweeping wheel is used for sweeping dust, a reasonable dust shielding device is lacked, or a small amount of water spraying dust removal splashing prevention technology is used in the prior art, the problems of sweeping adhesion, unclean sweeping and the like can be caused, and therefore the functions and the structure of the environmental sanitation sweeping device are required to be improved again.

Disclosure of Invention

The invention provides a sanitation cleaning device, which solves the problems that when the cleaning wheel at the bottom of a sweeper cleans dust on a road surface, a large amount of dust smoke or flying dust flies outwards to cause pollution to the surrounding environment and cause troubles to pedestrians on a walking path at one side of the road surface.

In order to achieve the purpose, the invention provides the following technical scheme: a sanitation cleaning device comprises a sweeper frame, a tread groove, a pressure frame mechanism, a welding plate, a pressure groove, a first guide rod, a first reset spring, an ear plate, a side guard plate, a wheel cabin, a rubber wheel, a guide rail groove, a side connecting rod, a tread plate, a second guide rod, a limiting block, a direction spiral rotating seat, a second reset spring, a bottom mounting plate, a cleaning wheel mechanism, a bent rod, an electromagnetic chuck, a side gear and a bearing, wherein the left and right rotary cleaning wheel mechanism used for cleaning the road surface is mounted at the bottom of the front side of the sweeper frame through the bottom mounting plate, the direction spiral rotating seat is mounted inside the sweeper frame, a set of pressure frame mechanism is mounted at each of the left and right sides of the sweeper frame, a front second guide rod and a rear second guide rod are welded on the inner cavity surface of the sweeper frame, the limiting block is welded at the top end of the second guide rod, the two second guide rods are symmetrical to two sides of the direction spiral rotating seat, a bent rod is welded at each of the left end and the right end of the bottom mounting plate, the electromagnetic chucks are arranged at the left position and the right position, bearings are arranged on the two electromagnetic chucks, and the electromagnetic chucks are rotatably arranged on the bent rods through the bearings; the pressure frame mechanism welds the first guide bar in the indent including welding in the welding plate in the motor sweeper frame outside, sets up the indent of welding the board front side, welds, the suit is in the first reset spring in the first guide bar outside, and the otic placode on first guide bar is adorned to the slip suit, and the outer end welding of otic placode has the side guard plate, the side guard plate passes through the guide rail groove that the internal surface was seted up, and sliding fit is overhead in the welding plate outer end, there is the side connecting rod front side top surface of side guard plate through bolted connection.

Preferably, the inner end surfaces of the side connecting rods are welded with pedal plates, and the top surfaces of the pedal plates are provided with anti-skid pads.

Preferably, the bottom surface of the sweeper frame is provided with two treading grooves which are positioned at the bottom side of the treading plate.

Preferably, the second return spring is located directly on the bottom side of the side link.

Preferably, a wheel cabin is welded on the outer side of the bottom of the side guard plate, and a row of rubber wheels are installed in a bottom cavity of the wheel cabin.

Preferably, the electromagnetic chuck is positioned on the inner side of the side guard plate, namely, the electromagnetic chuck is covered when the side guard plate moves downwards.

Preferably, the electromagnetic chucks are disc-shaped electromagnets, and the two electromagnetic chucks are located on the outer side of the cleaning wheel mechanism in an inwardly inclined manner.

Preferably, a circle of side teeth are welded on the outer contour surface of each electromagnetic chuck.

Preferably, the side teeth are inserted between nylon brush rods of the cleaning wheel mechanism.

Preferably, the inner end of the side link is in sliding fit with the second guide rod by forming a circular through hole.

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

(1) in the both sides of motor sweeper, respectively set up one set of side guard plate mechanism, both sides guard plate mechanism, lie in the frame top during non-use, therefore the motor sweeper is when cleaning the road, if nobody on the pavement of road one side, the cleaning wheel normal rotation of motor sweeper bottom clean can, and the motor sweeper normal removal can not be obstructed, if there is the pedestrian on the pavement of road one side that cleans, can step on the step by the foot, make the side guard plate whereabouts towards pedestrian one side, form the protection and shelter from, with the raise dust that produces when reducing and cleaning, reduce the raise dust and to pedestrian's interference on the pavement, the functionality has been improved, and the mode that the side guard plate moves down comes from driver's foot and exerts pressure, just like habitual trampling brake during the operation, humanized structural design is reasonable, and convenient for operation.

(2) At the bottom both sides of motor sweeper, respectively set up one set of electromagnet, two electromagnets are located and sweep the wheel outside, and use in pairs with sweeping the wheel, sweep the wheel and not only sweep the clearance with dust and impurity on the road surface at rotatory in-process soon, and the iron class waste material that has deposited in cleaning in-process dust rubbish can be absorbed moreover, therefore the motor sweeper of this structure, when cleaning the town road, still has the function of magnetism absorption iron, has further improved the functionality.

(3) Still carry out structural design to electromagnet, make its rotation type to its rotary power just in time derives from rotatory cleaning wheel, makes electromagnet environmental protection and energy saving when rotatory, and it is when rotatory in-process magnetism suction surface iron sheet, and the surface adhesion iron sheet can be more even.

Drawings

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

FIG. 2 is a schematic axial perspective view of the present invention taken from FIG. 1;

FIG. 3 is a schematic view from the left side of FIG. 2 illustrating the present invention;

FIG. 4 is an enlarged view of portion A of the present invention taken from FIG. 3;

FIG. 5 is a bottom schematic bottom view of the present invention;

FIG. 6 is a schematic view of the present invention with the top cover removed;

FIG. 7 is a bottom perspective view of the invention from FIG. 6;

FIG. 8 is a schematic view of the left side plan view of the present invention from FIG. 6;

fig. 9 is a structural view showing the position of the second return spring according to the present invention.

Description of the main reference numerals:

1. a sweeper frame; 101. treading the groove; 2. a frame pressing mechanism; 201. welding the plate; 202. pressing a groove; 203. a first guide bar; 204. a first return spring; 205. an ear plate; 3. a side guard plate; 301. a wheel well; 302. a rubber wheel; 303. a guide rail groove; 4. a side link; 401. treading the board; 5. a second guide bar; 501. a limiting block; 6. the steering wheel rotates rotatably; 7. a second return spring; 8. a bottom mounting plate; 9. a cleaning wheel mechanism; 10. bending a rod; 11. an electromagnetic chuck; 1101. a side tooth; 1102. and a bearing.

Detailed Description

The technical solutions of the present invention will be described in detail and fully with reference to the accompanying drawings, and it should be understood that the described embodiments are only some embodiments, but not all embodiments, of the present invention. 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.

In the description of the present invention, it should be noted that the orientations or positional relationships indicated as the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., appear based on the orientations or positional relationships shown in the drawings only for the convenience of describing the present invention and simplifying the description, but not for indicating or implying that the referred devices or elements must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as limiting the invention.

In the description of the present invention, it should be noted that, unless otherwise explicitly stated or limited, the terms "mounted," "connected," and "connected" should be interpreted broadly, e.g., as being fixed or detachable or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present application can be understood in a specific case to those skilled in the art.

Referring to fig. 1-9, a sanitation cleaning device comprises a sweeper frame 1, a treading groove 101, a pressure frame mechanism 2, a welding plate 201, a pressure groove 202, a first guide rod 203, a first return spring 204, an ear plate 205, a side guard plate 3, a wheel cabin 301, a rubber wheel 302, a guide rail groove 303, a side connecting rod 4, a treading plate 401, a second guide rod 5, a limiting block 501, a direction spiral rotary seat 6, a second return spring 7, a bottom mounting plate 8, a cleaning wheel mechanism 9, a bent rod 10, an electromagnetic chuck 11, a side tooth 1101 and a bearing 1102, wherein the left and right rotary cleaning wheel mechanisms 9 for cleaning a road surface are arranged at the front bottom of the sweeper frame 1 through the bottom mounting plate 8, the cleaning wheel mechanisms 9 are rotary cleaning wheels existing at the bottom of the sweeper, the structures are common, are mostly composed of a power mechanism and conical cleaning wheels made of nylon, and are positioned at two sides of the bottom of the sweeper body to rotate, the dust impurities on the road surface are swept into the collecting cabin at the bottom, and the sweeping wheel mechanism 9 is the existing rotary sweeping technology at the bottom of the sweeper, and is not described in detail herein. Also, according to the principle of the prior art, a steering wheel rotary base 6 for mounting a steering wheel is further installed inside the sweeper frame 1, which is different from the prior sweeper only in sweeping technologies: the left side and the right side of the sweeper frame 1 are respectively provided with a set of pressing frame mechanisms 2, when the pressing frame mechanisms 2 are not in use, the pressing frame mechanisms are as shown in fig. 3, the inner cavity surface of the sweeper frame 1 is welded with a front second guide rod 5 and a rear second guide rod 5, the top end of the second guide rod 5 is welded with a limiting block 501, the second guide rod 5 is sleeved with a second return spring 7, and as shown in fig. 2, the two second guide rods 5 are symmetrical to two sides of a direction spiral rotary seat 6 and used for conducting inner side guiding on a side connecting rod 4 which is pressed downwards.

In order to improve the functionality, when the environmental sanitation sweeper cleans the road, the iron wastes possibly existing on the road can be synchronously absorbed, therefore, as shown in fig. 6 and 8, the left and right ends of the bottom mounting plate 8 are welded with a bent rod 10, the electromagnetic chuck 11 is at the left and right positions, the bearings 1102 are installed on the two electromagnetic chucks 11, the electromagnetic chucks 11 are rotatably installed on the curved rod 10 through the bearings 1102, and the two installed electromagnetic chucks 11 can rotate to achieve the purpose of better magnetic attraction on the iron waste possibly stored on the road surface, for example, during the rotation, can change the position, so that the iron waste is not concentrated on a certain part of the electromagnetic chuck 11 after being sucked, but the transposition adsorption makes the surface adhesion relatively more uniform when the electromagnetic chuck 11 adsorbs the iron waste, and improves the structural rationality of the function of the electromagnetic chuck 11.

The pressing frame mechanism 2 is located on both sides of the sweeper and can block a large amount of dust discharged to the outside when the sweeper cleans a road after being pressed down, so as to prevent interference to pedestrians on the peripheral walkway, and the functionality is improved again, as shown in fig. 3 and 4, the pressing frame mechanism 2 comprises a welding plate 201 welded on the outer side of the sweeper frame 1, a pressure groove 202 arranged on the front side of the welding plate 201, a first guide rod 203 welded in the pressure groove 202, a first return spring 204 sleeved on the outer side of the first guide rod 203, an ear plate 205 slidably sleeved on the first guide rod 203, and a side guard plate 3 welded on the outer end of the ear plate 205, the side guard plate 3 is slidably fitted on the outer end of the welding plate 201 through a guide rail groove 303 arranged on the inner surface, the top surface of the front side guard plate 3 is connected with a side connecting rod 4 through a bolt, the inner end of the side connecting rod 4 is slidably fitted on a second guide rod 5 through a circular through hole, when the side connecting rod 4 is pressed downwards, the side protecting plate 3 is driven to move downwards, and meanwhile, when the side protecting plate 3 moves downwards, the mode that the guide rail groove 303 at the right side part is used for sliding and guiding the outer end head of the welding plate 201 is utilized, the moving stability of the side protecting plate is improved, the lug plate 205 at the inner surface of the side protecting plate 3 also slides downwards along the first guide rod 203, the moving stability of the right side part of the side protecting plate 3 is improved again, when the lug plate 205 moves downwards, the first return spring 204 is compressed to store force, and simultaneously, the inner end head of the side connecting rod 4 also slides downwards along the second guide rod 5, so that the inner side stable guiding during the downward moving of the side protecting plate 3 is formed, the left and right side guiding modes can enable the side protecting plate 3 in the moving process to horizontally slide, the structural reasonability is improved, when the side connecting rod 4 moves downwards, the second return spring 7 is compressed to store force, and the side protecting plate 3 which is behind in the downward moving process is, the dust discharged outwards in the cleaning process of the cleaning wheel is just blocked to a certain extent, the side connecting rod 4 which is not pressed downwards is reset by the first reset spring 204 and the second reset spring 7, and is reset upwards, finally the side protection plate 3 is reset upwards, the cleaning work is carried out in an open mode, and at the moment, part of sand particles can be directly cleaned to the roadside. And the rigidity of the second return spring 7 is larger than that of the first return spring 204, and the main supporting force of the side guard plate 3 normally depends on the second return spring 7, so that the side guard plate 3 can be ensured to integrally translate downwards although the downward pressing acting force is mainly placed on the side connecting rod 4 and the second return spring 7, and a good protection effect is achieved.

Specifically, as shown in fig. 2, in order to improve the structural rationality, when the side connecting rod 4 is pressed down, the side connecting rod is as if the brake is habitually trodden, so that the inner end surface of the side connecting rod 4 is further welded with a pedal 401 as a brake pedal, for making the structure more reasonable, the top surface of the pedal 401 is provided with an anti-skid pad, and finally, the side connecting rod 4 is pressed down in a trodden manner for the purpose of convenient operation and reasonable humanized structural design.

Specifically, as shown in fig. 6, a stepping groove 101 is formed in the bottom surface of the sweeper frame 1 to enable a stepping plate 401 after being stepped down to fall to the maximum extent, the stepping groove 101 is also a mounting groove for mounting a brake plate on an existing sweeper, the width of the stepping groove 101 can be reasonably designed according to actual mounting of the brake plate and the stepping plate 401, the width dimension of the stepping groove can be set to be about twenty centimeters, the dimension of the stepping groove can be considered according to actual processing conditions, the brake plate cannot be subjected to action when the stepping plate 401 acts, the dimension is the prior art, and hard setting is not performed here.

Specifically, as shown in fig. 5, a wheel chamber 301 is welded at the outer side of the bottom of the side guard plate 3, and a row of rubber wheels 302 is installed in a bottom cavity of the wheel chamber 301, so that when the side guard plate 3 is in contact with the ground after falling down, a rolling effect is formed at the bottom, and the side guard plate is prevented from being in rigid contact with the ground, so that noise and deformation occur when the side guard plate advances along with the vehicle body, and the structural design of the side guard plate 3 is more reasonable.

Specifically, the electromagnetic chuck 11 is located inside the side guard 3, i.e. the electromagnetic chuck 11 is covered when the side guard 3 moves down, so as to prevent the side guard 3 and the electromagnetic chuck 11 from forming an obstacle after the side guard moves down.

Specifically, the electromagnetic chucks 11 are disc-shaped electromagnets, and the electromagnetic chucks 11 at two positions are both located on the outer side of the cleaning wheel mechanism 9 in an inner oblique manner, and are substantially located on the outer side of the cleaning wheel, so that when the cleaning wheel cleans the floor, the iron objects which are rotatably swept on the floor can be magnetically attracted.

Specifically, as shown in fig. 7, in order to make the electromagnetic chuck 11 rotate during actual use, a circle of side teeth 1101 are welded on the outer contour surface of the electromagnetic chuck 11, and the side teeth 1101 are inserted between the nylon brush rods of the cleaning wheel mechanism 9, so that it can be seen that the cleaning wheel on the road surface is cleaned in a rotating state, and the cleaning wheel can be just blocked on the side teeth 1101 by using the rotation characteristic thereof, and the electromagnetic chuck 11 is made to rotate through the side teeth 1101, so that the position of the inner suction surface of the electromagnetic chuck 11 can be flexibly changed during the rotation of the electromagnetic chuck 11, so that the iron waste can not be concentrated on a certain part of the electromagnetic chuck 11 after being sucked, but is transposed and sucked, the surface adhesion is relatively more uniform when the electromagnetic chuck 11 sucks the iron waste, and the structural performance of the electromagnetic chuck 11 is improved.

The working principle is as follows: the driver sitting in the cab can normally clean impurities on the road surface by using the cleaning wheel of the prior rotary technology of the sweeper when the sweeper is in a non-protection state, most of non-garbage sand can be cleaned to the bottom of the road edge stone when the sweeper rotates to clean the road surface, and the flexible sweeping rod of the cleaning wheel can clean a farther range to the outer side. However, when the vehicle is driven to a pedestrian or a situation with a lot of splashes such as sand and stones on the walking path, in order to prevent the situation from being used, a lot of sand or dust is sprayed out from the vehicle bottom to affect the pedestrian, at this time, the driver can step on the pedal 401, the side connecting rod 4 drives the side guard plate 3 at the side part to press down under the action of pressure, the cleaning wheel at the inner side of the side guard plate 3 is shielded, so that the sand and dust can be shielded, the interference of the sand and dust to the crowd on the road path is prevented, when the vehicle moves to an unmanned area, the foot is moved away from the pedal 401, the side connecting rod 4 which is not pressed down is reset by the first reset spring 204 and the second reset spring 7, the side guard plate 3 is reset upwards, the open type cleaning work is carried out, part of the sand can be directly cleaned to the wastes, and most of the wastes are cleaned to the existing recovery device cabin at the bottom of the vehicle (the recovery structure is a dust collection device with a plurality of cleaning vehicle bottom suction type However, this prior art will not be described separately regardless of the design), and when used, the sweeping range can be increased, and obviously, the push-down type side guard plate 3 mechanism is selectively used according to the actual situation when a driver cleans the road, and the treading height can be selectively controlled.

Meanwhile, the electromagnetic chucks 11 positioned on both sides of the cleaning wheel can rotate synchronously along with the rotation of the cleaning wheel, and can absorb and collect most of the iron wastes raised in the cleaning process, and the electromagnetic chucks 11 have the rotation characteristic, so that the iron wastes are not concentrated on a certain part of the electromagnetic chucks 11 after being absorbed, but are adsorbed in a transposition manner, the surface adhesion is relatively more uniform when the electromagnetic chucks 11 adsorb the iron wastes, and the structural rationality of the electromagnetic chucks 11 is improved.

The foregoing descriptions of specific exemplary embodiments of the present invention have been presented for purposes of illustration and description. It is not intended to limit the invention to the precise form disclosed, and obviously many modifications and variations are possible in light of the above teaching. The exemplary embodiments were chosen and described in order to explain certain principles of the invention and its practical application to enable one skilled in the art to make and use various exemplary embodiments of the invention and various alternatives and modifications as are suited to the particular use contemplated. It is intended that the scope of the invention be defined by the claims and their equivalents.