阅读说明：本技术 一种离合器散热防尘系统以及农用机械 (Clutch heat dissipation dustproof system and agricultural machine ) 是由 何箐民 单体国 李学文 程照轩 高玉凯 于 2021-10-08 设计创作，主要内容包括：本发明涉及一种离合器散热防尘系统以及农用机械,离合器散热防尘系统包括离合器本体、封闭壳体、供气管路以及气源,离合器本体设在封闭壳体的腔体内,封闭壳体上开设有与其腔体内的离合器本体连通的进气口和出气口,气源通过供气管路与进气口连通并向封闭壳体的腔体内输入气体。本发明利用气源通过供气管路向离合器本体所在腔体内输入气体,气体从封闭壳体的进气口到达离合器腔体后产生正压并通过出气口持续泄压排气,通过泄压排气带走封闭壳体腔体内的热空气,实现离合器本体的散热,防止离合器本体因热量不容易散发而高温烧毁,延长离合器本体的使用寿命；通过输入气体使腔体内保持正压,保证外部杂尘无法进入,实现腔体内部的有效防尘。(The invention relates to a clutch heat-dissipation dustproof system and agricultural machinery. According to the invention, the gas source is used for inputting gas into the cavity where the clutch body is located through the gas supply pipeline, the gas reaches the clutch cavity from the gas inlet of the closed shell to generate positive pressure and continuously release pressure and exhaust through the gas outlet, and hot air in the cavity of the closed shell is taken away through pressure release and exhaust, so that the heat dissipation of the clutch body is realized, the high-temperature burnout of the clutch body due to the fact that the heat is not easily dissipated is prevented, and the service life of the clutch body is prolonged; positive pressure is kept in the cavity through input gas, external dust is guaranteed not to enter, and effective dust prevention in the cavity is achieved.)

1. The utility model provides a clutch heat dissipation dustproof system, its characterized in that, includes clutch body, seal shell, air supply line and air supply, clutch body establishes in seal shell's cavity, set up on the seal shell with the air inlet and the gas outlet of the clutch body intercommunication in its cavity, the air supply pass through the air supply line with the air inlet intercommunication and to seal shell's cavity internal input gas.

2. The clutch heat-dissipation and dust-prevention system as claimed in claim 1, wherein the air source comprises any one or more of an air-assisted brake system, an engine heat-dissipation fan, an air-conditioning system and an electric fan.

3. The clutch heat-dissipation and dust-prevention system as claimed in claim 2, wherein the air-assisted brake system comprises an air pump, an air reservoir and a brake assembly, the air reservoir is communicated with the brake assembly and the air pump through a pipeline respectively, a pressure release valve is arranged on a pipeline between the air reservoir and the air pump, an air inlet end of the pressure release valve is communicated with the air pump, an air outlet end of the pressure release valve is communicated with the air reservoir, and a pressure release end of the pressure release valve is connected with the air supply pipeline.

4. The heat-dissipation and dust-prevention system for the clutch as claimed in claim 1, wherein the close housing comprises a clutch housing and a torque amplifier housing, the clutch housing and the torque amplifier housing are engaged with each other to form the cavity, and the clutch body is located in the clutch housing; the air inlet and the air outlet are respectively arranged on the clutch shell.

5. The heat-dissipation and dust-prevention system of claim 1 wherein the number of the air inlets and the number of the air outlets are one or more, the air inlets and the air outlets are correspondingly disposed, and the correspondingly disposed air inlets and air outlets are centrally and symmetrically disposed on the periphery of the clutch body.

6. The heat and dust dissipating system of claim 1, wherein the air inlet is provided with a protrusion, the protrusion forms an air inlet channel therein, and an end of the air supply pipe is sleeved and fixed on the protrusion.

7. The heat-dissipation and dust-prevention system for the clutch as claimed in claim 1, wherein a vent plug or a breather valve is installed at the air outlet.

8. The heat-dissipating and dust-preventing system for a clutch according to claim 1, wherein the clutch body comprises a pressure plate, a friction plate and a pressure plate seat, the pressure plate is mounted on the pressure plate seat, the friction plate is assembled between the pressure plate and the pressure plate seat and transmits torque by mutual friction between the pressure plate and the pressure plate seat; the air inlet and the air outlet correspond to the circumferential side positions of the friction plates respectively.

9. The heat and dust removal system for a clutch of claim 1 wherein positive pressure is applied to said closed housing.

10. An agricultural machine comprising the clutch heat-dissipating and dust-preventing system of any one of claims 1 to 9.

Technical Field

The invention relates to the technical field of clutch correlation, in particular to a clutch heat dissipation and dust prevention system and agricultural machinery.

Background

In the prior art, the clutch is generally positioned in a closed cavity, air in the space where the clutch is positioned is not circulated, and heat is not easy to dissipate. When the clutch is in a half-clutch state, heat generated by relative sliding friction of the friction plate is not easy to dissipate, and high-temperature burning is easy to cause.

Disclosure of Invention

The invention aims to solve the technical problems that the air in the space of the existing clutch is not circulated, the heat is not easy to dissipate, and when the clutch is in a half-clutch state, the heat generated by relative sliding friction of a friction plate is not easy to dissipate, so that the friction plate is easy to burn at high temperature.

The technical scheme for solving the technical problems is as follows: the utility model provides a clutch heat dissipation dustproof system, includes clutch body, seal shell, air supply line and air supply, clutch body establishes in seal shell's cavity, set up on the seal shell with air inlet and the gas outlet of the clutch body intercommunication in its cavity, the air supply pass through the air supply line with the air inlet intercommunication and to seal shell's cavity internal input gas.

The invention has the beneficial effects that: according to the clutch heat-dissipation dustproof system, the air source is used for inputting air into the cavity of the closed shell where the clutch body is located through the air supply pipeline, the air reaches the clutch cavity from the air inlet of the closed shell and generates positive pressure, the pressure is continuously released and exhausted through the air outlet, hot air in the cavity of the closed shell is taken away through the released and exhausted air, the heat dissipation of the clutch body is realized, the clutch body is prevented from being burnt at high temperature due to the fact that heat is not easily released, and the service life of the clutch body is prolonged; and keep the malleation in making the cavity of seal shell through the input gas, guarantee that outside miscellaneous dirt can't get into, can realize the effective dustproof of cavity inside, further reduce clutch body because of the dust pile up the unable radiating risk effectively, prolong clutch body's life.

On the basis of the technical scheme, the invention can be further improved as follows.

Further, the air source comprises any one or more of an air-assisted braking system, an engine cooling fan, an air conditioning system and an electric fan.

The beneficial effect of adopting the further scheme is that: the air supply can adopt one or more of air power assisted brake system, engine radiator fan, air conditioning system and electric fan as required, adopts two or more air supplies simultaneous working, when one of them unable normal use or efficiency is not enough, can adopt other air supplies in order to satisfy the heat dissipation and the dustproof demand of clutch body.

Further, the air-assisted braking system comprises an air pump, an air storage cylinder and a braking assembly, wherein the air storage cylinder is communicated with the braking assembly and the air pump through pipelines respectively, a pressure release valve is arranged on a pipeline between the air storage cylinder and the air pump, the air inlet end of the pressure release valve is communicated with the air pump, the air outlet end of the pressure release valve is communicated with the air storage cylinder, and the pressure release end of the pressure release valve is connected with the air supply pipeline.

The beneficial effect of adopting the further scheme is that: the pressure relief end of the pressure relief valve of the air-assisted brake system supplies air for the closed shell, waste gas of the air-assisted brake system can be used for dissipating heat for the clutch body, extra other power is not needed, and energy consumption is saved.

Further, the closed shell comprises a clutch shell and a torque amplifier shell, the clutch shell and the torque amplifier shell are mutually buckled to form the cavity, and the clutch body is positioned in the clutch shell; the air inlet and the air outlet are respectively arranged on the clutch shell.

The beneficial effect of adopting the further scheme is that: the air inlet and the air outlet are respectively arranged on the clutch shell, so that the air inlet and the air outlet are respectively arranged corresponding to the clutch body, the input gas can be directly blown onto the clutch body, the gas absorbing heat can be directly discharged through the air outlet, the clutch body is effectively cooled, and the heat dissipation efficiency is improved.

Further, the air inlet and the gas outlet are respectively one or more, and are a plurality of the air inlet and a plurality of the gas outlet one-to-one sets up, and the air inlet and the gas outlet that correspond the setting are centrosymmetric arrangement in the week side of clutch body.

The beneficial effect of adopting the further scheme is that: the air inlet and the air outlet which are arranged in a central symmetry mode are adopted, so that the balance and stability of air inlet and air outlet can be maintained, the positive pressure in the closed shell is ensured, and the dustproof effect in the closed shell is achieved.

Furthermore, the air inlet is provided with a convex structure, an air inlet channel is formed in the convex structure, and one end of the air supply pipeline is sleeved and fixed on the convex structure.

The beneficial effect of adopting the further scheme is that: the air inlet is provided with a convex structure, so that the air supply pipeline is conveniently connected.

Further, a vent plug or a breather valve is arranged at the air outlet.

The beneficial effect of adopting the further scheme is that: is favorable for keeping the positive pressure in the closed shell and has dustproof effect.

Further, the clutch body comprises a pressure plate, a friction plate and a pressure plate seat, wherein the pressure plate is arranged on the pressure plate seat, the friction plate is assembled between the pressure plate and the pressure plate seat, and the friction plate and the pressure plate seat mutually rub to transmit torque; the air inlet and the air outlet correspond to the circumferential side positions of the friction plates respectively.

The beneficial effect of adopting the further scheme is that: the air inlet and the air outlet correspond to the circumferential side positions of the friction plates, so that the generated heat can be blown to the air outlet from the air inlet quickly, and effective and quick heat dissipation is realized.

Further, positive pressure exists in the closed shell.

The beneficial effect of adopting the further scheme is that: prevent external dust from entering the sealed shell, and achieve the dustproof effect.

An agricultural machine comprises the clutch heat dissipation and dust prevention system.

The invention has the beneficial effects that: according to the agricultural machine, the clutch heat dissipation dustproof system is arranged, gas is input into the cavity of the closed shell where the clutch body is located through the gas supply pipeline by using the gas source, positive pressure is generated after the gas reaches the clutch cavity from the gas inlet of the closed shell, pressure is continuously released and exhausted through the gas outlet, hot air in the cavity of the closed shell is taken away through pressure release and exhaust, heat dissipation of the clutch body is achieved, the clutch body is prevented from being burnt at high temperature due to the fact that heat is not easy to dissipate, the service life of the clutch body is prolonged, and the working efficiency of the agricultural machine is improved; and keep the malleation in making the cavity of closed shell through the input gas, guarantee that outside miscellaneous dirt can't get into, can realize the effective dustproof of cavity inside, further reduce the clutch body because of the risk that the dust piles up and can't effectively dispel the heat, prolong the life of clutch body, improve farm machinery's work efficiency.

Drawings

FIG. 1 is a schematic structural view of a heat dissipation and dust prevention system of a clutch according to the present invention;

FIG. 2 is an enlarged view of portion A of FIG. 1;

fig. 3 is an enlarged schematic view of a portion B in fig. 1.

In the drawings, the components represented by the respective reference numerals are listed below:

1. a clutch body; 11. a platen; 12. a friction plate; 13. a platen base;

2. a gas supply line;

3. a clutch housing; 31. an air inlet; 32. an air outlet; 33. a convex structure; 34. a venting plug;

4. a torque booster housing;

5. a gas-assisted braking system; 51. an air pump; 52. an air cylinder; 53. a brake pedal; 54. a master brake valve; 55. braking a booster pump; 56. a brake caliper; 57. a pressure relief valve; 571. an air inlet end; 572. an air outlet end; 573. a pressure relief end;

6. an engine radiator fan; 7. an air conditioning system; 8. an electric fan.

Detailed Description

The principles and features of this invention are described below in conjunction with the following drawings, which are set forth by way of illustration only and are not intended to limit the scope of the invention.

Example 1

As shown in fig. 1-3, the clutch heat dissipation dustproof system of this embodiment includes clutch body 1, seal shell, air supply line 2 and air supply, clutch body 1 is established in seal shell's cavity, seal shell is last to set up air inlet 31 and gas outlet 32 rather than the clutch body 1 intercommunication in the cavity, the air supply pass through air supply line 2 with air inlet 31 intercommunication and to seal shell's cavity internal input gas, gaseous in the cavity with clutch body 1's heat take away to discharge through gas outlet 32. This embodiment is passed through air supply and air inlet 31 and is gaseous to the cavity internal input, makes for the malleation in the enclosure casing avoids in outside dust enters into the enclosure casing, reaches dustproof effect.

As shown in fig. 1, the air supply of the present embodiment includes any one or more of an air-assisted brake system 5, an engine cooling fan 6, an air conditioning system 7, and an electric fan 8. The air supply can adopt one or more of air power assisted brake system, engine radiator fan, air conditioning system and electric fan as required, adopts two or more air supplies simultaneous working, when one of them unable normal use or efficiency is not enough, can adopt other air supplies in order to satisfy the heat dissipation and the dustproof demand of clutch body.

Wherein, the specific implementation scheme of the gas source is as follows:

in the first embodiment, only the air-assisted brake system 5 is adopted, and the air-assisted brake system is directly communicated with the air inlet 31 of the closed shell through the air supply pipeline 2.

In the second embodiment, only the engine radiator fan 6 is adopted, a fan housing may be provided on the engine radiator fan, and one end of the air supply line 2 may be connected to the fan housing and communicated with the engine radiator fan inside the fan housing.

In the third embodiment, only the air conditioning system 7 is adopted, and one end of the air supply pipeline 2 can be communicated with the air outlet of the air conditioning system 7.

In the fourth embodiment, only the electric fan 8 is adopted, a fan housing may be provided on the electric fan 8, and one end of the air supply line 2 may be connected to the fan housing and communicated with the electric fan 8 inside the fan housing.

In the fifth embodiment, the air-assisted brake system 5 and the engine cooling fan 6 are adopted simultaneously, and two branch pipes can be arranged at one end of the air supply pipeline 2 and are respectively communicated with the air-assisted brake system 5 and the engine cooling fan 6. In order to facilitate control of the air supply to the air supply line 2 by the air-assisted brake system 5 and the engine radiator fan 6, valves may be provided in the two branch lines, respectively.

In the sixth embodiment, the air-assisted braking system 5 and the air-conditioning system 7 are adopted simultaneously, and two branch pipes can be arranged at one end of the air supply pipeline 2 and are respectively communicated with the air-assisted braking system 5 and the air-conditioning system 7. In order to facilitate the control of the air supply of the air-assisted brake system 5 and the air conditioning system 7 to the air supply line 2, valves may be provided in each of the two branch lines.

In the seventh embodiment, the engine cooling fan 6 and the air conditioning system 7 are simultaneously adopted, and two branch pipes can be arranged at one end of the air supply pipeline 2 and are respectively communicated with the engine cooling fan 6 and the air conditioning system 7. In order to facilitate control of the engine radiator fan 6 and the air conditioning system 7 to supply air into the air supply line 2, valves may be provided on the two branch pipes, respectively.

In the eighth embodiment, an air-assisted brake system 5, an engine cooling fan 6 and an air-conditioning system 7 are adopted at the same time, and three branch pipes can be arranged at one end of the air supply pipeline 2 and are respectively communicated with the air-assisted brake system 5, the engine cooling fan 6 and the air-conditioning system 7. In order to facilitate the control of the air supply of the air-assisted brake system 5, the engine cooling fan 6 and the air conditioning system 7 to the air supply line 2, valves may be provided on the three branch pipes, respectively.

Other embodiments exist for the gas source, not to mention here.

As shown in fig. 1 and 2, the air-assisted brake system 5 of the present embodiment includes an air pump 51, an air cylinder 52 and a brake assembly, the air cylinder 52 is respectively communicated with the brake assembly and the air pump 51 through a pipeline, a pressure relief valve 57 is disposed on the pipeline between the air cylinder 52 and the air pump 51, an air inlet end 571 of the pressure relief valve 57 is communicated with the air pump 51, an air outlet end 572 of the pressure relief valve 57 is communicated with the air cylinder 52, and a pressure relief end 573 of the pressure relief valve 57 is connected with the air supply pipeline 2. The pressure relief end of the pressure relief valve of the air-assisted brake system supplies air for the closed shell, waste gas of the air-assisted brake system can be used for dissipating heat for the clutch body, extra other power is not needed, and energy consumption is saved.

As shown in fig. 1, in one specific aspect of the present embodiment, the brake assembly includes a brake pedal 53, a master cylinder valve 54, a brake booster pump 55, and a brake caliper 56, the air cylinder 52, the master cylinder valve 54, the brake booster pump 55, and the brake caliper 56 are sequentially connected by a pipe, the brake pedal 53 is connected to the master cylinder valve 54, the ventilation amount at the master cylinder valve 54 is controlled by depressing the brake pedal 53, and the ventilation amount of the master cylinder valve 54 increases as the brake pedal 53 is depressed deeper. When the air-assisted brake system 5 of this embodiment is in operation, the air pump 51 is connected to the engine, the engine provides power to pump air into the air reservoir 52, so as to ensure the air pressure of the air-assisted brake system 5, for example, the preset pressure of the air-assisted brake system can be set to 0.8Mpa, after power is provided, the air path flows through the pressure release valve 57, the air reservoir 52, the master brake valve 54 and the brake booster pump 55, the air path is changed to an oil path at the brake booster pump 55, boosting is realized by the area change of the cylinder piston and the area change of the cylinder piston in the brake booster pump 55, and the excess air of the pressure release valve can be discharged from the pressure release end 573 of the pressure release valve 57 into the air supply line 2, and enter the cavity of the closed housing through the air supply line 2, so as to provide heat dissipation gas for the clutch body 1. When the engine is started, since the air pump 51 continuously operates to supply air to the air-assisted brake system, the air reservoir 52 reaches a preset pressure quickly, and then redundant air is always discharged from the pressure relief end 573 of the pressure relief valve 57 to the air supply line 2. When the air pressure of the air-assisted brake system 5 exceeds the preset pressure, the redundant air flows through the air supply pipeline 2 from the pressure relief end 573 of the pressure relief valve 57 and enters the cavity of the closed shell, and the redundant air is used for inflating the clutch body and dissipating heat.

As shown in fig. 1 and 3, the closed housing of the present embodiment includes a clutch housing 3 and a torque amplifier housing 4, the clutch housing 3 and the torque amplifier housing 4 are fastened to each other to form the cavity, and the clutch body 1 is located in the clutch housing 3; the air inlet 31 and the air outlet 32 are respectively provided on the clutch housing 3. The air inlet and the air outlet are respectively arranged on the clutch shell, so that the air inlet and the air outlet are respectively arranged corresponding to the clutch body, the input gas can be directly blown onto the clutch body, the gas absorbing heat can be directly discharged through the air outlet, the clutch body is effectively cooled, and the heat dissipation efficiency is improved.

As shown in fig. 1 to 3, the number of the air inlets 31 and the number of the air outlets 32 in the present embodiment are one or more, the plurality of air inlets 31 and the plurality of air outlets 32 are arranged in a one-to-one correspondence, and the correspondingly arranged air inlets 31 and the correspondingly arranged air outlets 32 are arranged on the peripheral side of the clutch body 1 in a centrosymmetric manner. The air inlet and the air outlet which are arranged in a central symmetry mode are adopted, so that the balance and stability of air inlet and air outlet can be maintained, the positive pressure in the closed shell is ensured, and the dustproof effect in the closed shell is achieved.

As shown in fig. 3, the air inlet 31 of the present embodiment is provided with a convex structure 33, an air inlet channel is formed in the convex structure 33, one end of the air supply pipeline 2 is sleeved and fixed on the outer side wall of the convex structure 33, and specifically, a steel wire or an iron wire may be used to hoop one end of the air supply pipeline 2 on the convex structure 33. The air inlet is provided with a convex structure, so that the air supply pipeline is conveniently connected.

Another alternative for connecting the air supply pipeline 2 and the air inlet 31 is to provide a first quick-connect connector at one end of the air supply pipeline 2, provide a second quick-connect connector at a position corresponding to the air inlet 31, and use the first quick-connect connector and the second quick-connect connector to realize the quick connection of the air supply pipeline 2 at the air inlet 31.

As shown in fig. 3, a vent plug 34 or a breather valve is installed at the air outlet 32 in the present embodiment. Is favorable for keeping the positive pressure in the closed shell and has dustproof effect.

As shown in fig. 1 and 3, the clutch body 1 of the present embodiment includes a pressure plate 11, friction plates 12, and a pressure plate holder 13, the pressure plate 11 being mounted on the pressure plate holder 13, the friction plates 12 being fitted between the pressure plate 11 and the pressure plate holder 13 and transmitting torque by mutual friction between the pressure plate 11 and the pressure plate holder 13; the air inlet 31 and the air outlet 32 correspond to the circumferential side positions of the friction plates 12, respectively. The air inlet and the air outlet correspond to the circumferential side positions of the friction plates, so that the generated heat can be blown to the air outlet from the air inlet quickly, and effective and quick heat dissipation is realized.

According to the clutch heat-dissipation dustproof system, gas is input into the cavity of the closed shell where the clutch body is located through the gas supply pipeline by using the gas source, positive pressure is generated after the gas reaches the clutch cavity from the gas inlet of the closed shell, pressure is continuously released and exhausted through the gas outlet, hot air in the cavity of the closed shell is taken away through the pressure-releasing and exhausting, the heat dissipation of the clutch body is realized, the clutch body is prevented from being burnt at high temperature due to the fact that heat is not easily dissipated, and the service life of the clutch body is prolonged; and keep the malleation in making the cavity of seal shell through the input gas, guarantee that outside miscellaneous dirt can't get into, can realize the effective dustproof of cavity inside, further reduce clutch body because of the dust pile up the unable radiating risk effectively, prolong clutch body's life.

Example 2

The agricultural machine of the embodiment comprises the clutch heat dissipation and dust prevention system.

According to the agricultural machine, the clutch heat-dissipation dustproof system is arranged on the agricultural machine, air is input into the cavity of the closed shell where the clutch body is located through the air supply pipeline by utilizing the air source, positive pressure is generated after the air reaches the clutch cavity from the air inlet of the closed shell, pressure is continuously released and exhausted through the air outlet, hot air in the cavity of the closed shell is taken away through the pressure-releasing and exhausting, the heat dissipation of the clutch body is realized, the clutch body is prevented from being burnt at high temperature due to the fact that heat is not easy to dissipate, the service life of the clutch body is prolonged, and the working efficiency of the agricultural machine is improved; and keep the malleation in making the cavity of closed shell through the input gas, guarantee that outside miscellaneous dirt can't get into, can realize the effective dustproof of cavity inside, further reduce the clutch body because of the risk that the dust piles up and can't effectively dispel the heat, prolong the life of clutch body, improve farm machinery's work efficiency.

In the description of the present invention, it is to be understood that the terms "center," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "axial," "radial," "circumferential," and the like are used in the orientation or positional relationship indicated in the drawings for convenience in describing the invention and to simplify the description, and are not intended to indicate or imply that the device or element so referred to must have a particular orientation, be constructed and operated in a particular orientation, and are not to be construed as limiting the invention.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.

In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can, for example, be fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.

In the present invention, unless otherwise expressly stated or limited, the first feature "on" or "under" the second feature may be directly contacting the first and second features or indirectly contacting the first and second features through an intermediate. Also, a first feature "on," "over," and "above" a second feature may be directly or diagonally above the second feature, or may simply indicate that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature may be directly under or obliquely under the first feature, or may simply mean that the first feature is at a lesser elevation than the second feature.

In the description herein, references to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above are not necessarily intended to refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, various embodiments or examples and features of different embodiments or examples described in this specification can be combined and combined by one skilled in the art without contradiction.

Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention, and that variations, modifications, substitutions and alterations can be made to the above embodiments by those of ordinary skill in the art within the scope of the present invention.