阅读说明：本技术 一种轨道车辆及其转向架 (Rail vehicle and bogie thereof ) 是由 姜斌 刘阳 段泽斌 于云海 王卉子 徐练 张相宁 于 2020-08-14 设计创作，主要内容包括：本发明涉及轨道车辆技术领域,具体地,涉及一种轨道车辆及其转向架。该转向架包括构架和牵引装置；所述构架包括并排设置的两个侧梁和并排设置的两个横梁；所述横梁安装于两个所述侧梁；所述牵引装置为箱型结构,限位于两个所述横梁之间。该转向架采用箱型结构的牵引装置,能够在保证上、下车间的能量传递与结构强度的同时,较好的传递纵向冲击,并且在碰撞时可承受较大的冲击载荷。(The invention relates to the technical field of railway vehicles, in particular to a railway vehicle and a bogie thereof. The bogie comprises a framework and a traction device; the framework comprises two side beams arranged side by side and two cross beams arranged side by side; the cross beam is arranged on the two side beams; the traction device is of a box-type structure and is limited between the two cross beams. The bogie adopts a traction device with a box-type structure, can better transmit longitudinal impact while ensuring the energy transmission and the structural strength between an upper car and a lower car, and can bear larger impact load when colliding.)

1. A bogie is characterized by comprising a framework and a traction device;

the framework comprises two side beams arranged side by side and two cross beams arranged side by side; the cross beam is arranged on the two side beams;

the traction device is of a box-type structure and is limited between the two cross beams.

2. The bogie of claim 1, wherein the draft gear comprises a box, an upper end plate fixedly attached to the top of the box, and a reinforcing structure fixedly attached to the box;

the box body is limited between the two cross beams;

the upper end plate is provided with a connecting structure for connecting a vehicle body.

3. The truck of claim 2 wherein said box is of rectangular parallelepiped configuration and includes a bottom end plate disposed opposite said upper end plate and 4 side plates fixedly connected between said bottom end plate and said upper end plate;

the side plates are sequentially connected end to end along the circumferential direction.

4. The bogie according to claim 3, wherein the 4 side plates include two longitudinal side plates extending in a longitudinal direction and disposed oppositely, and two lateral side plates extending in a lateral direction and disposed oppositely;

the reinforcing structure comprises at least one tubular reinforcing piece arranged along the longitudinal direction, and two ends of each tubular reinforcing piece are fixedly connected to the two transverse side plates respectively;

the transverse side plates correspond to the cross beams one to one.

5. The bogie according to claim 4, wherein the reinforcing structure further comprises a perforated web located between the two lateral side plates, the perforated web being provided with one-to-one perforations with each of the tubular reinforcing members;

the tubular reinforcing part penetrates through the corresponding through hole and is fixedly connected with the rib plate with the hole;

the ribbed plate with holes is fixedly connected with the bottom end plate, the upper end plate and the two longitudinal side plates.

6. The bogie of claim 5, further comprising a draft gear mount for restraining the draft gear to the beam;

the traction device mounting seat comprises two connecting plates which are oppositely arranged, two baffles which are oppositely arranged and a plurality of ribbed plates; the two connecting plates and the two baffles form a rectangular frame structure;

one connecting plate is arranged between the transverse side plate and the transverse beam which correspond to each other;

the plurality of rib plates are fixedly connected between the connecting plates and the cross beam which correspond to each other.

7. The bogie according to claim 5, further comprising a plurality of reinforcing rib plates distributed on the outer side surfaces of the two transverse side plates, wherein one side of each reinforcing rib plate is fixedly connected to the transverse side plate, and the other side of each reinforcing rib plate is fixedly connected to the bottom surface of the upper end plate.

8. The bogie according to claim 7, wherein a plurality of the gusset plates are symmetrically distributed.

9. The bogie according to claim 7, wherein the stiffener plate is a right-angled triangular plate or a right-angled trapezoidal plate.

10. A bogie as claimed in claim 4 in which at least one tubular reinforcement is 4 tubular reinforcements distributed in a matrix;

the tubular reinforcement is a hollow round tube.

11. A bogie as claimed in claim 4 in which the transverse side plates are provided with one-to-one clearance fit through holes for each of the tubular reinforcing members;

the end parts of the tubular reinforcing parts are inserted into the corresponding through holes, and the end faces of the tubular reinforcing parts are flush with the outer surfaces of the transverse side plates of the corresponding ends.

12. The bogie according to any one of claims 2 to 11, wherein the connecting structure is two rows of mounting holes symmetrically arranged in the longitudinal direction, each row of mounting holes comprising a plurality of mounting holes evenly distributed in the transverse direction.

13. A rail vehicle, characterized in that it comprises a bogie according to any one of claims 1-12.

Technical Field

The application relates to the technical field of railway vehicles, in particular to a railway vehicle and a bogie thereof.

Background

The rail vehicle is an important traffic tie connecting cities, is gradually a main vehicle in the cities, and is also a main carrier for realizing goods transportation. The rail vehicle mainly comprises a vehicle body and a bogie arranged below the vehicle body, wherein the bogie is used for bearing the vehicle body and realizing walking and steering functions.

Conventional bogies mainly include frames, wheel sets, traction devices, braking devices, damping devices, axle boxes, primary and secondary suspensions. The frame is a main framework of the bogie, and a general traction device is arranged at the center of the frame and used for realizing connection between the vehicle body and the frame. The prior traction device generally adopts a conical center pin structure, but the traction device with the structure cannot bear large impact load in the longitudinal direction.

Disclosure of Invention

The embodiment of the application provides a rail vehicle and bogie thereof, and the bogie adopts the draw gear of box structure, can be when guaranteeing energy transfer and structural strength between getting on and off the bus, better transmission vertical impact to can bear great impact load when the collision.

According to a first aspect of embodiments of the present application, there is provided a bogie comprising a frame and a traction device;

the framework comprises two side beams arranged side by side and two cross beams arranged side by side; the cross beam is arranged on the two side beams;

the traction device is of a box-type structure and is limited between the two cross beams.

Preferably, the traction device comprises a box body, an upper end plate fixedly connected to the top of the box body, and a reinforcing structure fixedly connected to the box body;

the box body is limited between the two cross beams;

the upper end plate is provided with a connecting structure for connecting a vehicle body.

Preferably, the box body is of a cuboid structure and comprises a bottom end plate and 4 side plates, wherein the bottom end plate is arranged opposite to the upper end plate, and the 4 side plates are fixedly connected between the bottom end plate and the upper end plate;

the side plates are sequentially connected end to end along the circumferential direction.

Preferably, the 4 side plates comprise two longitudinal side plates extending along the longitudinal direction and oppositely arranged, and two transverse side plates extending along the transverse direction and oppositely arranged;

the reinforcing structure comprises at least one tubular reinforcing piece arranged along the longitudinal direction, and two ends of each tubular reinforcing piece are fixedly connected to the two transverse side plates respectively;

the transverse side plates correspond to the cross beams one to one.

Preferably, the reinforcing structure further comprises a perforated rib plate located between the two transverse side plates, and the perforated rib plate is provided with perforations corresponding to the tubular reinforcing members one to one;

the tubular reinforcing part penetrates through the corresponding through hole and is fixedly connected with the rib plate with the hole;

the ribbed plate with holes is fixedly connected with the bottom end plate, the upper end plate and the two longitudinal side plates.

Preferably, the traction device further comprises a traction device mounting seat used for limiting the traction device on the cross beam;

the traction device mounting seat comprises two connecting plates which are oppositely arranged, two baffles which are oppositely arranged and a plurality of ribbed plates; the two connecting plates and the two baffles form a rectangular frame structure;

the connecting plate is fixedly connected between the transverse side plate and the transverse beam which correspond to each other;

the plurality of rib plates are fixedly connected between the connecting plates and the cross beam which correspond to each other.

Preferably, the side plate structure further comprises a plurality of reinforcing rib plates distributed on the outer side surfaces of the two transverse side plates, one side of each reinforcing rib plate is fixedly connected to the transverse side plate, and the other side of each reinforcing rib plate is fixedly connected to the bottom surface of the upper end plate.

Preferably, a plurality of the reinforcing rib plates are symmetrically distributed.

Preferably, the reinforcing rib plate is a right-angled triangular plate or a right-angled trapezoidal plate.

Preferably, the at least one tubular reinforcement is 4 tubular reinforcements distributed in a matrix;

the tubular reinforcement is a hollow round tube.

Preferably, the transverse side plate is provided with through holes which correspond to each tubular reinforcing piece one by one and are in clearance fit with each tubular reinforcing piece;

the end parts of the tubular reinforcing parts are inserted into the corresponding through holes, and the end faces of the tubular reinforcing parts are flush with the outer surfaces of the transverse side plates of the corresponding ends.

Preferably, the connecting structure is two rows of mounting holes symmetrically arranged along the longitudinal direction, and each row of mounting holes comprises a plurality of mounting holes uniformly distributed along the transverse direction.

According to a first aspect of embodiments of the present application, there is provided a rail vehicle comprising any one of the bogies provided in the above-mentioned claims.

Adopt rail vehicle and bogie thereof that provides in this application embodiment, have following beneficial effect:

the bogie comprises a framework and a traction device, wherein the framework is fixedly connected with two cross beams between two side beams arranged side by side, and the traction device is limited between the two cross beams; because draw gear is spacing between two crossbeams to adopt the box structure, can strengthen draw gear structural strength and rigidity in horizontal and vertical, consequently, compare with the draw gear of current center pin structure, the draw gear of this application embodiment not only has simple structure's characteristics, but also can be when guaranteeing the energy transfer and the structural strength of getting on, getting off the bus, better transmission vertical impact, and can bear great impact load when the collision.

Drawings

The accompanying drawings, which are included to provide a further understanding of the application and are incorporated in and constitute a part of this application, illustrate embodiment(s) of the application and together with the description serve to explain the application and not to limit the application. In the drawings:

fig. 1 is a schematic perspective view of a bogie according to an embodiment of the present application;

FIG. 2 is a top view of the truck provided in FIG. 1;

FIG. 3 is a side view of the truck provided in FIG. 2;

FIG. 4 is a schematic exploded view of the bogie provided in FIG. 1;

FIG. 5 is a schematic perspective view of the draft gear of the truck of FIG. 1;

fig. 6 is a schematic view of the draft gear provided in fig. 5 with longitudinal side plates removed.

Reference numerals:

1-a side beam; 2-a cross beam; 4-wheel pair; 6-secondary suspension device; 7-a traction device;

71-a connecting plate; 72-a baffle; 73-a rib plate; 74-upper end plate; 75-a bottom end plate; 76-side plate; 77-a tubular reinforcement; 78-rib plate with holes; 79-reinforcing rib plate;

741-a mounting hole; 761-longitudinal side plate; 762-transverse side panels.

Detailed Description

In order to make the technical solutions and advantages of the embodiments of the present application more apparent, the following further detailed description of the exemplary embodiments of the present application with reference to the accompanying drawings makes it clear that the described embodiments are only a part of the embodiments of the present application, and are not exhaustive of all embodiments. It should be noted that the embodiments and features of the embodiments in the present application may be combined with each other without conflict.

In the embodiment of the present application, the longitudinal direction is the traveling direction of the railway vehicle, i.e., the arrangement direction of the two wheel pairs; the transverse direction is the vehicle width direction of the railway vehicle, namely the axial direction of the wheel centering axle of the bogie or the length extension direction of a cross beam of the framework; the vertical direction is the height direction of the rail vehicle.

The embodiment of the application provides a railway vehicle and a bogie thereof, wherein the railway vehicle comprises the bogie and a vehicle body (not shown in the figure) installed on the bogie. The detailed structure of the bogie employed in the railway vehicle will be described below, with reference to fig. 1, 2, 3 and 4.

As shown in the configuration of fig. 1, the bogie comprises a frame and a traction device 7; the bogie also comprises a wheel pair 4 for supporting the framework and rotating along the track and a secondary suspension device 6 arranged at the top of the framework; the framework comprises two side beams 1 arranged side by side and two cross beams 2 arranged side by side; the two cross beams 2 are arranged on the two side beams 1; as shown in the structures of fig. 1, 2 and 4, two cross beams 2 are installed between two parallel side beams 1, the two cross beams 2 are arranged in parallel and at intervals, the two cross beams 2 are vertically connected with the side beams 1, the arrangement direction of the two side beams 1 is overlapped with the arrangement direction of the steel rails, and the length direction of the cross beams 2 is overlapped with the width direction of the railway vehicle; the length direction of the side beam 1 is superposed with the advancing direction of the rail vehicle, the length direction of the rail vehicle, the arrangement direction of the two cross beams 2 and the extending direction of the steel rail; the cross beam 2 can be made of steel pipes;

the traction device 7 is of a box-type structure and is arranged between the two cross beams 2. As shown in the structures of fig. 1, 5 and 6, the traction device 7 is a box-shaped structure and is limited between the two cross beams 2, the top of the traction device 7 is used for connecting the vehicle body, and the power transmission is performed on the vehicle body through the traction device 7, so that the vehicle body moves along the steel rail under the driving of the bogie.

The bogie comprises a framework and a traction device 7, wherein the framework is provided with two cross beams 2 between two side beams 1 arranged side by side, and the traction device 7 is limited between the two cross beams 2; because the traction device 7 is limited between the two cross beams 2 and adopts a box-type structure, the structural strength and the rigidity of the traction device 7 in the transverse direction and the longitudinal direction can be enhanced, and therefore, compared with the traction device 7 with the existing center pin structure, the traction device 7 has the characteristic of simple structure, can better transmit longitudinal impact while ensuring the energy transmission and the structural strength between the upper and lower vehicles, and can bear larger impact load during collision.

In a particular embodiment, as shown in the configuration of fig. 5 and 6, the traction means 7 comprise a box (not shown), an upper end plate 74 fixedly connected to the top of the box, and a reinforcing structure fixedly connected to the box; the box body is limited between the two cross beams 2; the upper end plate 74 is provided with a connecting structure for connecting the vehicle body. The box body is of a rectangular parallelepiped structure or a square structure and comprises a bottom end plate 75 arranged opposite to the upper end plate 74 and 4 side plates 76 fixedly connected between the bottom end plate 75 and the upper end plate 74; the side plates 76 are sequentially connected end to end along the circumferential direction; the 4 side plates 76 are sequentially connected end to form a rectangular cylinder structure, the upper end plate 74 and the bottom end plate 75 are plugged at two ends of the rectangular cylinder structure, and the length and the width of the upper end plate 74 are both larger than those of the bottom end plate 75; as shown in the structure of figure 1, the box body is limited and arranged between the two cross beams 2 through 4 side plates 76. As shown in the structure of fig. 1, the towing device 7 is mounted and connected to the vehicle body through the upper end plate 74, and the connection structure provided on the upper end plate 74 may be two rows of mounting holes 741 symmetrically arranged in the longitudinal direction, and each row of mounting holes 741 includes a plurality of mounting holes 741 uniformly distributed in the transverse direction; as shown in fig. 1 and fig. 2, two rows of mounting holes 741 are formed in the upper end plate 74, the mounting holes 741 are used for inserting bolts, and the vehicle body is mounted on the upper end plate 74 through bolts and nuts that are screwed together, so that the vehicle body is supported on the rail, the arrangement direction of each row of mounting holes 741 coincides with the extending direction of the cross beam 2, and the arrangement direction of the two rows of mounting holes 741 coincides with the arrangement direction of the two wheel sets 4; the actual number of the installation holes 741 can be determined according to actual conditions.

The traction device 7 adopts a cuboid box structure or a square box structure, comprises a box body and an upper end plate 74 fixedly connected to the top of the box body, and is provided with a reinforcing structure fixedly connected to the box body, the structural strength and rigidity of the traction device 7 in the longitudinal direction can be enhanced through the box body, and the structural strength and rigidity of the box body can be further improved through the reinforcing structure; and the box is cuboid or square, not only makes convenient, swift and simple structure, makes rail vehicle can bear bigger impact load when the collision.

Specifically, as shown in the structure of fig. 5, the 4 side plates 76 of the traction device 7 include two longitudinal side plates 761 extending in the longitudinal direction and disposed oppositely, and two transverse side plates 762 extending in the transverse direction and disposed oppositely; the longitudinal side plate 761 and the transverse side plate 762 are vertically arranged, and the two longitudinal side plates 761 and the two transverse side plates 762 are connected together by welding to form a rectangular cylinder structure. The reinforcing structure comprises at least one tubular reinforcing member 77 arranged along the longitudinal direction, and both ends of each tubular reinforcing member 77 are fixedly connected with two transverse side plates 762 respectively; as shown in the structure of fig. 6, at least one of the tubular reinforcing members 77 constituting the reinforcing structure may be 4, and the 4 tubular reinforcing members 77 constitute a matrix distribution of two rows and two columns, and the tubular reinforcing member 77 may be a hollow circular tube, and one end of the tubular reinforcing member 77 is fixedly connected to one lateral side plate 762 of the two opposite lateral side plates 762, and the other end of the tubular reinforcing member is fixedly connected to the other lateral side plate 762 of the two opposite lateral side plates 762. The tubular reinforcing members 77 for reinforcing the structure of the box body can be provided with 1, 2, 3, 4 or more, in the embodiment of the present application, only the traction device 7 with 4 tubular reinforcing members 77 distributed in a matrix is taken as an example for description, and in the actual use process, the number, the distribution form and the size of the tubular reinforcing members 77 can be set according to actual requirements. The lateral side plates 762 are connected to the cross members 2 in a one-to-one correspondence. As shown in the structure of fig. 1, the draft gear 7 is limited between the two lateral beams 2 by the draft gear mounting seat through two lateral side plates 762 and two longitudinal side plates 761, the two lateral side plates 762 are oppositely arranged and correspond to the two lateral beams 2 one by one, so that each lateral beam 2 limits the corresponding lateral side plate 762. By setting the distance between the two cross beams 2, the traction device 7 can be clamped and limited between the two cross beams 2. The lateral side plate 762 can be retained between the two cross beams 2 by the draft gear mount in fig. 1. In the embodiments and drawings of the present application, the lateral side plate 762 is limited between the two cross beams 2 by the draft gear mounting seat.

The tubular reinforcing member 77 disposed between the two lateral side plates 762 can further reinforce the structural strength and rigidity of the box body in the longitudinal direction, so that the structural strength and rigidity of the traction device 7 in the longitudinal direction can be improved, the impact load strength which can be borne by the traction device 7 during longitudinal collision can be improved, and the purpose of better transmitting longitudinal impact can be realized.

In order to further improve the structural strength and rigidity of the traction device 7, as shown in the structure of fig. 6, the reinforcing structure further includes a perforated rib 78 located between the two lateral side plates 762, the perforated rib 78 is provided with a through hole corresponding to each tubular reinforcing member 77 one by one; the tubular reinforcing part 77 passes through the corresponding through hole and is fixedly connected with the rib plate 78 with the hole; the ribbed plate 78 is fixedly connected to the bottom end plate 75, the upper end plate 74 and the two longitudinal side plates 761. As shown in the structure of fig. 6, a perforated rib plate 78 is further disposed in the box body, and the perforated rib plate 78 may be disposed at a position right in the middle of the two transverse side plates 762, that is, the two transverse side plates 762 are symmetrically disposed with the perforated rib plate 78 as a symmetry axis; the perforated rib plate 78 is provided with through holes for penetrating the tubular reinforcing members 77, that is, when 4 tubular reinforcing members 77 are arranged in the traction device 7, the perforated rib plate 78 is provided with 4 through holes corresponding to the positions and the sizes of the tubular reinforcing members 77 one by one, and the tubular reinforcing members 77 and the through holes can be in clearance fit and are connected by welding; except for the fact that the perforated rib plate 78 is fixedly connected with the tubular reinforcing part 77, the top of the perforated rib plate 78 is fixedly connected with the upper end plate 74, the bottom of the perforated rib plate 78 is fixedly connected with the bottom end plate 75, and two side edges of the perforated rib plate 78 are fixedly connected with the two longitudinal side plates 761 which are oppositely arranged, so that the upper end plate 74, the two longitudinal side plates 761, the bottom end plate 75 and the tubular reinforcing part 77 are connected into an integral structure again through the perforated rib plate 78, the traction device 7 has enough strength and rigidity in the longitudinal direction, the transverse direction and the vertical direction, and the bearing requirement of the railway vehicle on the traction device 7 in the collision process can be met.

Furthermore, as shown in the structure of fig. 1 and 4, the bogie further comprises a traction device mounting seat for limiting the traction device 7 between the two cross beams 2; the traction device mounting seat is positioned between the traction device 7 and the two cross beams 2, the traction device mounting seat is fixedly mounted on the two cross beams 2, the traction device 7 is limited in the traction device mounting seat through a transverse side plate 762 and a longitudinal side plate 761, and the traction force is transmitted from the framework to the vehicle body through the traction device 7; the traction device mounting base comprises two connecting plates 71 which are oppositely arranged, two baffles 72 which are oppositely arranged and a plurality of cross ribs 73; a connecting plate 71 is arranged between the corresponding transverse side plate 762 and the cross beam 2; the plurality of ribs 73 are fixedly connected between the connecting plates 71 and the cross beam 2 which correspond to each other; as shown in fig. 1 and 4, the connecting plates 71 are arranged parallel to the cross beams 2, the baffles 72 are arranged perpendicular to the cross beams 2, one connecting plate 71 is fixedly connected to one side of each cross beam 2, one baffle 72 is fixedly connected to each of two ends of each connecting plate 71, the two connecting plates 71 and the two baffles 72 form a rectangular frame structure, an internal space of the rectangular frame structure can just accommodate the traction device 7, the traction device 7 is stopped in the rectangular frame structure formed by the baffles 72 and the connecting plates 71, and the displacement of the traction device 7 in the transverse direction and the longitudinal direction is limited.

As shown in fig. 5 and 6, the traction device 7 further includes a plurality of rib plates 79 distributed on the outer side surfaces of the two lateral side plates 762, one side of each rib plate 79 is fixedly connected to the lateral side plate 762, and the other side is fixedly connected to the bottom surface of the upper end plate 74. The plurality of reinforcing rib plates 79 arranged on the two transverse side plates 762 can be symmetrically arranged or asymmetrically arranged; when the plurality of reinforcing rib plates 79 are symmetrically distributed, that is, a plurality of reinforcing rib plates 79 are arranged at symmetrical positions on the outer side surfaces of the two transverse side plates 762, as shown in the structure of fig. 5, 3 reinforcing rib plates 79 are arranged on the outer side surfaces of the transverse side plates 762. The number and position of the reinforcing ribs 79 may be determined according to actual conditions, and in the embodiment and the drawings of the present application, only 3 reinforcing ribs 79 are provided between the lateral side plate 762 and the upper end plate 74 as an example. In addition to the reinforcing rib plate 79 provided on the outer side surface of the lateral side plate 762, a plurality of reinforcing rib plates 79 may be provided on the outer side surface of the longitudinal side plate 761. The stiffener plate 79 may be a right-angled triangular plate or a right-angled trapezoidal plate.

Through the plurality of reinforcing rib plates 79 arranged on the outer side faces of the transverse side plates 762, the reinforcing rib plates 79 are arranged along the longitudinal direction, and two side edges are respectively and fixedly connected to the transverse side plates 762 and the upper end plates 74, so that the structural strength and rigidity between the transverse side plates 762 and the upper end plates 74 can be enhanced, and the structural strength of the upper end plates 74 and the box body can be improved.

On the basis of the above-mentioned various embodiments, as shown in the structure of fig. 5 and 6, the lateral side plate 762 is provided with through holes which are in one-to-one correspondence with each tubular reinforcing member 77 and are in clearance fit with each other, that is, when there are two tubular reinforcing members 77 arranged in the box body, 4 through holes are opened on the lateral side plate 762; the end of the tubular reinforcement 77 is inserted into the corresponding through hole, and the end face of the tubular reinforcement 77 is flush with the outer surface of the lateral side plate 762 of the corresponding end.

Because the through hole for penetrating the tubular reinforcement 77 is formed in the transverse side plate 762, when the tubular reinforcement 77 is installed, one end of the tubular reinforcement 77 can penetrate through the through hole to be installed and fixed after the box body is formed, so that the assembly of the tubular reinforcement 77 on the box body is facilitated, meanwhile, the structural strength and rigidity of the box body in the longitudinal direction can be improved through the tubular reinforcement 77 penetrating in the longitudinal direction, the force of bearing the impact load by the traction device 7 in the longitudinal direction can be improved, and the transmission of the impact load by the traction device 7 in the longitudinal direction can be improved.

While the preferred embodiments of the present application have been described, additional variations and modifications in those embodiments may occur to those skilled in the art once they learn of the basic inventive concepts. Therefore, it is intended that the appended claims be interpreted as including preferred embodiments and all alterations and modifications as fall within the scope of the application.

It will be apparent to those skilled in the art that various changes and modifications may be made in the present application without departing from the spirit and scope of the application. Thus, if such modifications and variations of the present application fall within the scope of the claims of the present application and their equivalents, the present application is intended to include such modifications and variations as well.