阅读说明：本技术 一种环卫用拖地车 (Mopping vehicle for environmental sanitation ) 是由 周脉强 汤荣 于 2020-12-25 设计创作，主要内容包括：本发明公开了一种环卫用拖地车,所述电动车本体的一侧下端固定安装有升降组件,所述升降组件的底端设有拖地组件,所述拖地组件的一侧固定设有清扫组件,所述升降组件远离电动车本体的一侧固定安装有T型防护杆,所述升降组件的顶端远离电动车本体的一侧固定设有驱动组件,本发明,通过设置清扫组件和拖地组件并配合使用驱动组件,能够有效对垃圾进行清扫,进而方便后续的拖地面板对清扫后的地面进行拖地作业,从而提升了拖地效果；通过设置干燥组件,启动两侧的风机并开启加热板,外部风体通过防尘网过滤后进入L型槽中经过加热板加热,随后在通过多组通槽吹出,并和地面接触,从而对拖地后的潮湿地面进行干燥,防止地面潮湿影响行人使用。(The invention discloses a mopping vehicle for environmental sanitation, wherein a lifting assembly is fixedly arranged at the lower end of one side of an electric vehicle body, a mopping assembly is arranged at the bottom end of the lifting assembly, a cleaning assembly is fixedly arranged at one side of the mopping assembly, a T-shaped protective rod is fixedly arranged at one side of the lifting assembly, which is far away from the electric vehicle body, and a driving assembly is fixedly arranged at one side of the top end of the lifting assembly, which is far away from the electric vehicle body; through setting up dry assembly, start the fan of both sides and open the hot plate, outside wind body gets into L type inslot through the hot plate heating after filtering through the dust screen, blows off through the multiunit groove afterwards to with ground contact, thereby carry out the drying to the moist ground after mopping ground, prevent that ground humidity from influencing the pedestrian and use.)

1. The utility model provides a sanitation is with dragging ground car, includes electric motor car body (1), its characterized in that: the electric vehicle is characterized in that a lifting assembly (2) is fixedly mounted at the lower end of one side of the electric vehicle body (1), a floor mopping assembly (3) is arranged at the bottom end of the lifting assembly (2), a cleaning assembly (4) is fixedly arranged at one side of the floor mopping assembly (3), a T-shaped protective rod (5) is fixedly mounted at one side, away from the electric vehicle body (1), of the lifting assembly (2), a driving assembly (6) is fixedly arranged at one side, away from the electric vehicle body (1), of the top end of the lifting assembly (2), and a drying assembly (7) is arranged at the bottom end of the electric vehicle body (;

lifting unit (2) are including connecting plate (21), bolt fixed mounting is passed through to one side of connecting plate (21) and one side lower extreme of electric motor car body (1), solenoid (22) in fixed inserting of middle part of connecting plate (21) is equipped with, screw thread inserts in interior solenoid (22) is equipped with adjusting screw (23), the both sides activity of connecting plate (21) is inserted and is equipped with guide bar (24), the fixed cover in top of guide bar (24) is equipped with spacing ring (241).

2. The mopping vehicle for environmental sanitation according to claim 1, wherein: the mopping assembly (3) comprises a top frame (31) and a mopping panel (32), a T-shaped sliding rod (321) is fixedly connected to the middle of the top end of the mopping panel (32), a T-shaped sliding groove (311) matched with the T-shaped sliding rod (321) is formed in the middle of the bottom end of the top frame (31), the T-shaped sliding rod (321) is clamped in the T-shaped sliding groove (311) in a sliding mode and connected through a bolt and a thread, and a handle (33) is fixedly installed on one side of the mopping panel (32);

the bottom end of the adjusting screw rod (23) is rotatably connected with the middle part of the top end of the top frame (31), and the bottom ends of the two groups of guide rods (24) are correspondingly fixedly connected with the two sides of the top end of the top frame (31).

3. The mopping vehicle for environmental sanitation according to claim 2, wherein: the cleaning assembly (4) comprises a connecting rod (41) and a U-shaped wrapping frame (45), two groups of connecting rods (41) are symmetrically distributed, one ends of the two groups of connecting rods (41) are respectively and correspondingly fixedly connected with one side of the connecting plate (21) far away from the electric vehicle body (1), a driving rod (42) is rotatably inserted into one side of the connecting rod (41) far away from the connecting plate (21), the bottoms of the driving rods (42) are fixedly sleeved with chassis (43), the two groups of chassis (43) are positioned in a U-shaped wrapping frame (45), a brush ring (44) is fixedly arranged on the outer side of the bottom end of the chassis (43), connecting blocks (46) which are symmetrically distributed are fixedly arranged on one side of the U-shaped wrapping frame (45), one side of the connecting block (46) far away from the U-shaped wrapping frame (45) is fixedly connected with one side of the top frame (31), the bottom end of the U-shaped wrapping frame (45) is fixedly provided with a brush frame (451).

4. The mopping vehicle for environmental sanitation according to claim 3, wherein: the bottom end surfaces of the floor mopping panel (32), the brush ring (44) and the brush frame (451) are flat.

5. The mopping vehicle for environmental sanitation according to claim 3, wherein: the driving assembly (6) comprises a driving motor (61), a first driving shaft (621) and a second driving shaft (622), the first driving shaft (621) and the second driving shaft (622) are of a symmetrical distribution structure, the first driving shaft (621) and the second driving shaft (622) are connected to the bottom end of the connecting plate (21) in a rotating mode, the driving motor (61) is fixedly installed on one side of the bottom end of the connecting plate (21), the output end of the driving motor (61) is fixedly connected with the bottom end of the first driving shaft (621), the tops of the first driving shaft (621) and the second driving shaft (622) are fixedly sleeved with driving gears (63), the two sets of driving gears (63) are mutually meshed, a first belt pulley (641) is fixedly sleeved in the middle of the first driving shaft (621) and the middle of the second driving shaft (622), and a second belt pulley (642) matched with the first belt pulley (641) is fixedly sleeved in the top of the driving shaft (42), and a driving belt (643) is movably sleeved on the outer sides of the first belt pulley (641) and the second belt pulley (642) which are corresponding to each other.

6. The mopping vehicle for environmental sanitation according to claim 1, wherein: one end of the T-shaped protection rod (5) is fixedly connected with the middle part of one side of the connecting plate (21) far away from the electric vehicle body (1).

7. The mopping vehicle for environmental sanitation according to claim 1, wherein: the drying component (7) comprises a bottom plate (71) and a rear frame (73), one side of the bottom end of the electric vehicle body (1) is provided with an L-shaped groove (101) matched with the drying component (7), one side of the L-shaped groove (101) extends to one side of the electric vehicle body (1), the bottom plate (71) is fixedly clamped at the bottom of the L-shaped groove (101), the middle part of the L-shaped groove (101) is fixedly provided with a heating plate (72) corresponding to the bottom plate (71), a plurality of groups of through grooves (711) distributed in a rectangular array are arranged on the bottom plate (71), the rear frame (73) is fixedly clamped at one side of the L-shaped groove (101) through bolts, the rear frame (73) is provided with symmetrically distributed through grooves (731), one side of the inner wall of the through groove (731) is fixedly clamped with a fan (74), and a dustproof net (75) is fixedly clamped on one side of the inner wall of the penetrating groove (731), which is far away from the fan (74).

8. The mopping vehicle for environmental sanitation according to claim 1, wherein: a warning lamp (8) is fixedly mounted on one side of the top end of the electric vehicle body (1).

9. The mopping vehicle for environmental sanitation according to claim 1, wherein: a sunshade ceiling (9) is fixedly mounted at the top end of the electric vehicle body (1).

Technical Field

The invention relates to the technical field of sanitation mopping vehicles, in particular to a mopping vehicle for sanitation.

Background

For places with wider space, such as squares, workshops, halls, corridors and the like, mopping is a work with large workload and high labor intensity. It is impossible to mop the floor by using a common mop, which has a small contact area with the floor and is difficult to clean the floor in a large space at a time. At present, the mopping work in the occasions with wide spaces adopts an electric mopping vehicle to mop the ground, sanitation workers can easily mop the ground by sitting on the vehicle, but the existing mopping vehicle for the sanitation is lack of a garbage cleaning mechanism, and for some dirty ground, the mopping operation is directly performed through a mopping panel, so that the damage of the mopping panel can be caused, the mopping effect of the ground can be influenced, secondly, a drying mechanism is lacked, after the mopping operation of the ground is finished, the ground can remain water, pedestrians can slip easily, and the damage is caused to the pedestrians, therefore, the mopping vehicle for the sanitation is provided for solving the problems.

Disclosure of Invention

The invention aims to provide a mopping vehicle for environmental sanitation, which aims to solve the problems in the background technology.

In order to achieve the purpose, the invention provides the following technical scheme: a floor mopping vehicle for environmental sanitation comprises an electric vehicle body, wherein a lifting assembly is fixedly mounted at the lower end of one side of the electric vehicle body, a floor mopping assembly is arranged at the bottom end of the lifting assembly, a cleaning assembly is fixedly arranged at one side of the floor mopping assembly, a T-shaped protective rod is fixedly mounted at one side, away from the electric vehicle body, of the lifting assembly, a driving assembly is fixedly arranged at one side, away from the electric vehicle body, of the top end of the lifting assembly, and a drying assembly is arranged at the bottom end of the electric vehicle body;

the lifting assembly comprises a connecting plate, one side of the connecting plate and the lower end of one side of the electric vehicle body are fixedly installed through bolts, an inner threaded pipe is fixedly inserted in the middle of the connecting plate, an adjusting screw rod is inserted in the inner threaded pipe in a threaded manner, guide rods are movably inserted in two sides of the connecting plate, and limiting rings are fixedly sleeved on the tops of the guide rods.

Preferably, the mopping assembly comprises a top frame and a mopping panel, a T-shaped sliding rod is fixedly connected to the middle of the top end of the mopping panel, a T-shaped sliding groove matched with the T-shaped sliding rod is formed in the middle of the bottom end of the top frame, the T-shaped sliding rod is slidably clamped in the T-shaped sliding groove and connected through a bolt and a thread, and a handle is fixedly mounted on one side of the mopping panel;

the bottom end of the adjusting screw rod is rotatably connected with the middle of the top end of the top frame, and the bottom ends of the two groups of guide rods are correspondingly fixedly connected with the two sides of the top end of the top frame.

Preferably, clean the subassembly and wrap up in the frame including connecting rod and U type, the connecting rod is equipped with two sets ofly that are the symmetric distribution, and is two sets of one side fixed connection that electric motor car body was kept away from with the connecting plate to the one end of connecting rod corresponds respectively, one side that the connecting plate was kept away from to the connecting rod is all rotated and is inserted and be equipped with the actuating lever, the bottom of actuating lever is all fixed the cover and is equipped with the chassis, and is two sets of the chassis is located the U type and wraps up in the frame, the fixed brush ring that is equipped with in the bottom outside on chassis, one side fixed mounting that the frame was wrapped up in to the U type has the connecting block that is the symmetric distribution, one side that the frame was wrapped up.

Preferably, the bottom end surfaces of the mopping panel, the brush ring and the brush frame are flat.

Preferably, drive assembly includes driving motor and first drive shaft and second drive shaft, first drive shaft and second drive shaft are the symmetric distribution structure, first drive shaft and second drive shaft all rotate the joint in the bottom of connecting plate, driving motor fixed mounting is in bottom one side of connecting plate, the output of driving motor and the bottom fixed connection of first drive shaft, the top of first drive shaft and second drive shaft is all fixed the cover and is established and drive gear, and two sets of drive gear intermeshing, the middle part of first drive shaft and second drive shaft is all fixed the cover and is equipped with first belt pulley, and is two sets of the top of drive shaft is all fixed the cover and is equipped with the second belt pulley that uses with the cooperation of first belt pulley, and the first belt pulley that corresponds each other and second belt pulley outside movable cover are equipped with the drive belt.

Preferably, one end of the T-shaped protection rod is fixedly connected with the middle part of one side of the connecting plate, which is far away from the electric vehicle body.

Preferably, drying assembly includes bottom plate and after-frame, the L type groove that uses with the drying assembly cooperation is seted up to bottom one side of electric motor car body, one side in L type groove extends to one side of electric motor car body, the bottom plate fixed joint is in the bottom in L type groove, the middle part fixed mounting in L type groove has the hot plate that corresponds with the bottom plate, set up the multiunit that is rectangular array and distributes on the bottom plate and lead to the groove, the after-frame passes through bolt fastening joint in one side in L type groove, set up the wear groove that is the symmetric distribution on the after-frame, the inner wall one side fixing clip that wears the groove is equipped with the fan, the inner wall that wears the groove is kept away from one side fixing clip of fan and is equipped.

Preferably, a warning lamp is fixedly mounted on one side of the top end of the electric vehicle body.

Preferably, a sun-shading ceiling is fixedly mounted at the top end of the electric vehicle body.

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

1. according to the invention, the cleaning assembly and the mopping assembly are arranged and the driving assembly is used in cooperation, so that garbage can be effectively cleaned, and further, the subsequent mopping operation of the mopping panel on the cleaned ground is facilitated, and the mopping effect is improved.

2. Through setting up dry assembly, start the fan of both sides and open the hot plate, outside wind body gets into L type inslot through the hot plate heating after filtering through the dust screen, blows off through the multiunit groove afterwards to with ground contact, thereby carry out the drying to the moist ground after mopping ground, prevent that ground humidity from influencing the pedestrian and use.

3. The front portion of the electric vehicle body is protected by the T-shaped protective rod, the front portion of the electric vehicle body is prevented from being damaged by external force, and the mopping assembly and the cleaning assembly can be effectively protected in an area through the T-shaped protective rod.

Drawings

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

FIG. 2 is a schematic view of the structural connections of the lifting assembly, the mopping assembly, the sweeping assembly, the T-shaped guard bar and the driving assembly of the present invention;

FIG. 3 is a schematic view of another structural connection of the lift assembly, the floor mopping assembly, the sweeping assembly, the T-shaped guard bar and the driving assembly of the present invention;

FIG. 4 is a schematic view of the structural connection between the body and the drying assembly of the electric vehicle according to the present invention;

fig. 5 is a schematic structural connection diagram of the electric vehicle body and the drying assembly according to the present invention.

In the figure: 1. an electric vehicle body; 2. a lifting assembly; 3. a mopping assembly; 4. a sweeping assembly; 5. a T-shaped guard bar; 6. a drive assembly; 7. a drying assembly; 8. a warning light; 9. a sunroof; 101. an L-shaped groove; 21. a connecting plate; 22. an inner solenoid; 23. adjusting the screw rod; 24. a guide bar; 241. a limiting ring; 31. a top frame; 311. a T-shaped chute; 32. a floor mopping panel; 321. a T-shaped slide bar; 33. a handle; 41. a connecting rod; 42. a drive rod; 43. a chassis; 44. a brush ring; 45. a U-shaped wrapping frame; 451. a brush frame; 46. connecting blocks; 61. a drive motor; 621. a first drive shaft; 622. a second drive shaft; 63. a drive gear; 641. a first pulley; 642. a second pulley; 643. a drive belt; 71. a base plate; 711. a through groove; 72. heating plates; 73. a rear frame; 731. penetrating a groove; 74. a fan; 75. a dust screen.

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 mopping vehicle for environmental sanitation comprises an electric vehicle body 1, wherein a lifting assembly 2 is fixedly mounted at the lower end of one side of the electric vehicle body 1, a mopping assembly 3 is arranged at the bottom end of the lifting assembly 2, a cleaning assembly 4 is fixedly arranged at one side of the mopping assembly 3, a T-shaped protective rod 5 is fixedly mounted at one side of the lifting assembly 2 away from the electric vehicle body 1, a driving assembly 6 is fixedly arranged at one side of the top end of the lifting assembly 2 away from the electric vehicle body 1, and a drying assembly 7 is arranged at the bottom end of the electric vehicle body 1; a warning lamp 8 is fixedly installed on one side of the top end of the electric vehicle body 1, and the warning lamp 8 is turned on to warn passers-by; the top fixed mounting of electric motor car body 1 has sunshade ceiling 9, carries out the sunshade rain to the user, promotes the result of use of whole mopping car.

The lifting assembly 2 comprises a connecting plate 21, one side of the connecting plate 21 and the lower end of one side of the electric vehicle body 1 are fixedly installed through bolts, an inner threaded pipe 22 is fixedly inserted in the middle of the connecting plate 21, an adjusting screw 23 is inserted in the inner threaded pipe 22 through threads, guide rods 24 are movably inserted in two sides of the connecting plate 21, and limiting rings 241 are fixedly sleeved on the tops of the guide rods 24.

The mopping assembly 3 comprises a top frame 31 and a mopping panel 32, wherein a T-shaped sliding rod 321 is fixedly connected to the middle of the top end of the mopping panel 32, a T-shaped sliding groove 311 matched with the T-shaped sliding rod 321 is formed in the middle of the bottom end of the top frame 31, the T-shaped sliding rod 321 is slidably clamped in the T-shaped sliding groove 311 and is in threaded connection through a bolt, a handle 33 is fixedly mounted on one side of the mopping panel 32, the T-shaped sliding rod 321 is pulled out of the outer side of the T-shaped sliding groove 311 through manually pulling the handle 33, and the mopping panel 32 is convenient to disassemble and clean; adjusting screw 23's bottom and top frame 31's top middle part rotate to be connected, the bottom of two sets of guide bars 24 corresponds the top both sides fixed connection with top frame 31, through manual clockwise or anticlockwise rotation adjusting screw 23, spiral lift in solenoid 22 including drive adjusting screw 23, and then drive top frame 31 and drag ground panel 32 and reciprocate, thereby adjust top frame 31 and drag the high position of ground panel 32 in a flexible way, when dragging ground panel 32 and move down to with ground in close contact with, can effectively promote to drag the ground panel 32 to the ground effect of dragging on ground, move up when dragging ground panel 32, make things convenient for T type slide bar 321's pull, and then conveniently change the washing to dragging ground panel 32.

The cleaning component 4 comprises a connecting rod 41 and a U-shaped wrapping frame 45, the connecting rod 41 is provided with two groups which are symmetrically distributed, one end of each group of connecting rods 41 corresponds to one side of the connecting plate 21 away from the electric vehicle body 1 and is fixedly connected with the side of the connecting rod 41 away from the connecting plate 21, a driving rod 42 is inserted in a rotating manner, the bottom of the driving rod 42 is fixedly sleeved with a chassis 43, the driving rod 42 rotates to drive the corresponding chassis 43 to rotate, the two groups of chassis 43 are positioned in the U-shaped wrapping frame 45, a brush ring 44 is fixedly arranged on the outer side of the bottom end of the chassis 43, through the synchronous reverse rotation of the two groups of driving rods 42, the two groups of brush rings 44 can be driven to synchronously and reversely rotate, wherein the left brush ring 44 rotates clockwise, the right brush ring 44 rotates anticlockwise, so that the two groups of brush rings 44 can clean garbage to the inner side of the U-shaped wrapping frame 45, the garbage is subjected to inertia outward expansion, the outer area of the brush ring 44 is wrapped by the U-shaped wrapping frame 45, the garbage is prevented from expanding outward, the garbage cleaning effect is improved, the subsequent mopping operation is facilitated, the mopping effect is further improved, the connecting blocks 46 which are symmetrically distributed are fixedly installed on one side of the U-shaped wrapping frame 45, one side, away from the U-shaped wrapping frame 45, of each connecting block 46 is fixedly connected with one side of the top frame 31, and the brush frame 451 is fixedly installed at the bottom end of the U-shaped wrapping frame 45; wherein the floor-mopping panel 32, the brush ring 44 and the bottom end surface of the brush frame 451 are flat and in contact with the ground.

The driving assembly 6 comprises a driving motor 61, a first driving shaft 621 and a second driving shaft 622, the first driving shaft 621 and the second driving shaft 622 are symmetrically distributed, the first driving shaft 621 and the second driving shaft 622 are rotatably connected to the bottom end of the connecting plate 21, the driving motor 61 is fixedly mounted on one side of the bottom end of the connecting plate 21, the output end of the driving motor 61 is fixedly connected to the bottom end of the first driving shaft 621, the tops of the first driving shaft 621 and the second driving shaft 622 are fixedly sleeved with a driving gear 63, the two groups of driving gears 63 are meshed with each other, the middle parts of the first driving shaft 621 and the second driving shaft 622 are fixedly sleeved with a first belt pulley 641, the tops of the two groups of driving rods 42 are fixedly sleeved with a second belt pulley 642 matched with the first belt pulley 641, a driving belt 643 is movably sleeved outside the first belt pulley 641 and the second belt pulley 642 corresponding to each other, and the driving motor 61 is controlled, the first driving shaft 621 is driven to rotate, and then the second driving shaft 622 is driven to rotate in the opposite direction synchronously, so as to drive the two sets of driving rods 42 to rotate in the opposite direction stably and synchronously.

One side middle part fixed connection that electric motor car body 1 was kept away from to the one end of T type fender rod 5 and connecting plate 21 protects electric motor car body 1's front portion through setting up T type fender rod 5, prevents that electric motor car body 1 front portion from receiving external force and suffering the damage, and can effectively carry out the region protection to dragging ground subassembly 3 and cleaning subassembly 4 through T type fender rod 5.

The drying component 7 comprises a bottom plate 71 and a rear frame 73, one side of the bottom end of the electric vehicle body 1 is provided with an L-shaped groove 101 matched with the drying component 7 for use, one side of the L-shaped groove 101 extends to one side of the electric vehicle body 1, the bottom plate 71 is fixedly clamped at the bottom of the L-shaped groove 101, the middle part of the L-shaped groove 101 is fixedly provided with a heating plate 72 corresponding to the bottom plate 71, the bottom plate 71 is provided with a plurality of groups of through grooves 711 distributed in a rectangular array, the rear frame 73 is fixedly clamped at one side of the L-shaped groove 101 through bolts, the rear frame 73 is provided with through grooves 731 distributed symmetrically, one side of the inner wall of the through groove 731 is fixedly clamped with a fan 74, one side of the inner wall of the through groove 731, which is far away from the fan 74 is provided with a dust screen 75, by starting the fans 74 at two sides and opening the heating plate 72, external, and is contacted with the ground, thereby drying the wet ground after mopping the ground and preventing the wet ground from influencing the use of pedestrians.

The working principle is as follows: the invention relates to a ground cleaning vehicle for environmental sanitation, when in use, firstly, the adjusting screw 23 is manually rotated to drive the adjusting screw 23 to spirally move downwards in an inner screw pipe 22, and further drive a top frame 31 and a ground cleaning panel 32 to move downwards, so as to flexibly adjust the height positions of the top frame 31 and the ground cleaning panel 32 until the ground cleaning panel 32 moves downwards and is tightly contacted with the ground, at the moment, the bottom end of a brush frame 451 is contacted with the ground, then, an electric vehicle body 1 is started to walk to drive all parts to move, and a driving motor 61 is synchronously controlled and started to drive a first driving shaft 621 to rotate, and further, a second driving shaft 622 is synchronously driven to reversely rotate, so as to drive two groups of driving rods 42 to stably synchronously and reversely rotate, through synchronous and reverse rotation of the two groups of driving rods 42, two groups of brush rings 44 can be synchronously and reversely rotated, wherein, the left brush ring 44 rotates clockwise, the right brush ring 44 rotates anticlockwise, so that two groups of brush rings 44 can clean garbage to the inner side of the U-shaped wrapping frame 45 conveniently, when the brush rings 44 clean the ground in a rotating mode, the garbage is expanded outwards by inertia, the outer area of the brush rings 44 is wrapped by the U-shaped wrapping frame 45, the garbage is prevented from expanding outwards, the cleaning effect of the garbage is improved, the subsequent floor mopping operation of the mopping panel 32 on the cleaned ground is facilitated, the mopping effect is further improved, the garbage cleaned on the ground is gathered by the brush frame 451 while the U-shaped wrapping frame 45 moves, the garbage is convenient to clean, in the mopping process, the fans 74 on the two sides can be started, the heating plate 72 is started, external air bodies are filtered by the dust screen 75 and then enter the L-shaped groove 101 to be heated by the heating plate 72, then the external air bodies are blown out through the plurality of the through grooves 711 and are contacted with the ground, so that the wet ground after being mopped is dried, prevent that ground moisture from influencing pedestrian's use.

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.