阅读说明：本技术 控制阀组和车辆 (Control valve group and vehicle ) 是由 杨德清 郭剑锋 陈晓莉 胡雪兵 杨程 于 2021-08-12 设计创作，主要内容包括：说明书摘要本申请实施例公开了一种控制阀组和车辆,其中控制阀组包括：阀体,阀体上开设有入油口、回油口、驻车制动油口和档位控制油口；驻车换向阀,设置在阀体上,驻车换向阀的进油口连通于入油口,驻车换向阀的出油口连通于回油口,驻车换向阀的第一油口连通于驻车制动油口；档位换向阀,设置在阀体上,档位换向阀的控制阀口连接于驻车换向阀的第一油口,档位换向阀的进油口连通于入油口,档位换向阀的出油口连通于回油口,档位换向阀的第一油口连通于档位控制油口。本申请实施例提供的控制阀组将驻车换向阀和档位换向阀集成在一个阀体上,使得阀体布局更加紧凑,驻车和档位的控制更为方便。(Summary of the inventionthe embodiment of the present application discloses a control valve group and a vehicle, wherein the control valve group comprises: the parking brake device comprises a valve body, a brake device and a brake control device, wherein an oil inlet, an oil return port, a parking brake oil port and a gear control oil port are formed in the valve body; the parking reversing valve is arranged on the valve body, an oil inlet of the parking reversing valve is communicated with the oil inlet, an oil outlet of the parking reversing valve is communicated with the oil return port, and a first oil port of the parking reversing valve is communicated with a parking braking oil port; the gear reversing valve is arranged on the valve body, a control valve port of the gear reversing valve is connected to a first oil port of the parking reversing valve, an oil inlet of the gear reversing valve is communicated with an oil inlet, an oil outlet of the gear reversing valve is communicated with an oil return port, and the first oil port of the gear reversing valve is communicated with a gear control oil port. The control valve group that this application embodiment provided is integrated parking switching-over valve and gear switching-over valve on a valve body for the valve body overall arrangement is compacter, and the control of parking and gear is more convenient.)

1. A control valve block, comprising:

the parking brake device comprises a valve body, a brake device and a brake control device, wherein an oil inlet, an oil return port, a parking brake oil port and a gear control oil port are formed in the valve body;

the parking reversing valve is arranged on the valve body, an oil inlet of the parking reversing valve is communicated with the oil inlet, an oil outlet of the parking reversing valve is communicated with the oil return port, and a first oil port of the parking reversing valve is communicated with the parking braking oil port;

the gear reversing valve is arranged on the valve body, a control valve port of the gear reversing valve is connected to a first oil port of the parking reversing valve, an oil inlet of the gear reversing valve is communicated with the oil inlet, an oil outlet of the gear reversing valve is communicated with the oil return port, and the first oil port of the gear reversing valve is communicated with the gear control oil port.

2. The valve manifold of claim 1, further comprising:

the parking reversing valve comprises a valve body, a first three-way valve, a manual pump valve port, a second three-way valve and a third three-way valve, wherein the first three-way valve is arranged on the valve body, the manual pump valve port is further formed in the valve body, the first valve port of the first three-way valve is communicated with the manual pump valve port, the second valve port of the first three-way valve is communicated with the parking braking oil port, and the third valve port of the first three-way valve is communicated with the first oil port of the parking reversing valve.

3. The valve manifold of claim 1, further comprising:

the retarding reversing valve is arranged on the valve body, a first motor oil discharge port is formed in the valve body, an oil inlet of the retarding reversing valve is communicated with the oil inlet, an oil outlet of the retarding reversing valve is communicated with the oil return port, and a first oil discharge port of the retarding reversing valve is communicated with the first motor oil discharge port.

4. The set of control valves of claim 3, further comprising:

the speed stabilizing reversing valve is arranged on the valve body, a second motor displacement oil port is formed in the valve body, an oil inlet of the speed stabilizing reversing valve is communicated with a high-pressure end of the driving system, an oil outlet of the speed stabilizing reversing valve is communicated with the oil return port, a first oil port of the speed stabilizing reversing valve is communicated with a second motor displacement oil port, and the displacement of the second motor displacement oil port is smaller than that of the slow speed reversing valve.

5. The set of control valves of claim 4, further comprising:

the anti-skid reversing valve is arranged on the valve body, a shunting pilot control port is formed in the valve body, an oil inlet of the anti-skid reversing valve is communicated with a first oil port of the speed stabilizing reversing valve, an oil outlet of the anti-skid reversing valve is communicated with an oil outlet of the speed stabilizing reversing valve, and the first oil port of the anti-skid reversing valve is communicated with the shunting pilot control port.

6. The set of control valves of claim 5, further comprising:

and the free pilot control port is formed in the valve body, is communicated with the oil inlet through an oil supply pipeline and is used for being communicated with the pilot control port of the shunt throttle valve.

7. The set of control valves of claim 6, further comprising:

and the first valve port of the second three-way control valve is communicated with the free pilot control port, the second valve port is communicated with the manual pump valve port on the valve body, and the third valve port is communicated with the oil inlet.

8. The set of control valves according to any one of claims 1 to 7,

the parking reversing valve is a pneumatic control reversing valve, and the gear reversing valve is a hydraulic control reversing valve;

the hydraulic control reversing valve is provided with an inserting core, and the hydraulic control reversing valve is inserted into the valve body through the inserting core.

9. The set of control valves according to any one of claims 1 to 7, further comprising:

and the one-way valve is arranged on a passage between the oil inlet and the parking reversing valve.

10. A vehicle, characterized by comprising:

a control valve assembly as claimed in any one of claims 1 to 9.

Technical Field

The embodiment of the application relates to the technical field of vehicle hydraulic control, in particular to a control valve group and a vehicle.

Background

The hydraulic control is a mode of changing the working state of an operation object by using hydraulic power, has the effects of large driving force and stable driving, and is particularly suitable for the control of engineering vehicles.

Disclosure of Invention

The present invention is directed to solving at least one of the problems of the prior art or the related art.

To this end, a first aspect of the invention provides a control valve group.

A second aspect of the invention provides a vehicle.

In view of this, according to a first aspect of the embodiments of the present application, a valve body is provided, in which an oil inlet, an oil return port, a parking brake oil port, and a shift control oil port are formed on the valve body;

the parking reversing valve is arranged on the valve body, an oil inlet of the parking reversing valve is communicated with the oil inlet, an oil outlet of the parking reversing valve is communicated with the oil return port, and a first oil port of the parking reversing valve is communicated with the parking braking oil port;

the gear reversing valve is arranged on the valve body, a control valve port of the gear reversing valve is connected to a first oil port of the parking reversing valve, an oil inlet of the gear reversing valve is communicated with the oil inlet, an oil outlet of the gear reversing valve is communicated with the oil return port, and the first oil port of the gear reversing valve is communicated with the gear control oil port.

In one possible embodiment, the control valve assembly further comprises:

the parking reversing valve comprises a valve body, a first three-way valve, a manual pump valve port, a second three-way valve and a third three-way valve, wherein the first three-way valve is arranged on the valve body, the manual pump valve port is further formed in the valve body, the first valve port of the first three-way valve is communicated with the manual pump valve port, the second valve port of the first three-way valve is communicated with the parking braking oil port, and the third valve port of the first three-way valve is communicated with the first oil port of the parking reversing valve.

In one possible embodiment, the control valve assembly further comprises:

the retarding reversing valve is arranged on the valve body, a first motor oil discharge port is formed in the valve body, an oil inlet of the retarding reversing valve is communicated with the oil inlet, an oil outlet of the retarding reversing valve is communicated with the oil return port, and a first oil discharge port of the retarding reversing valve is communicated with the first motor oil discharge port.

In one possible embodiment, the control valve assembly further comprises:

the speed stabilizing reversing valve is arranged on the valve body, a second motor displacement oil port is formed in the valve body, an oil inlet of the speed stabilizing reversing valve is communicated with a high-pressure end of the driving system, an oil outlet of the speed stabilizing reversing valve is communicated with the oil return port, a first oil port of the speed stabilizing reversing valve is communicated with a second motor displacement oil port, and the displacement of the second motor displacement oil port is smaller than that of the slow speed reversing valve.

In one possible embodiment, the control valve assembly further comprises:

the anti-skid reversing valve is arranged on the valve body, a shunting pilot control port is formed in the valve body, an oil inlet of the anti-skid reversing valve is communicated with a first oil port of the speed stabilizing reversing valve, an oil outlet of the anti-skid reversing valve is communicated with an oil outlet of the speed stabilizing reversing valve, and the first oil port of the anti-skid reversing valve is communicated with the shunting pilot control port.

In one possible embodiment, the control valve assembly further comprises:

and the free pilot control port is formed in the valve body, is communicated with the oil inlet through an oil supply pipeline and is used for being communicated with the pilot control port of the shunt throttle valve.

In one possible embodiment, the control valve assembly further comprises:

and the first valve port of the second three-way control valve is communicated with the free pilot control port, the second valve port is communicated with the manual pump valve port on the valve body, and the third valve port is communicated with the oil inlet.

In one possible embodiment, the parking reversing valve is a pneumatic control reversing valve, and the gear reversing valve is a hydraulic control reversing valve;

the hydraulic control reversing valve is provided with an inserting core, and the hydraulic control reversing valve is inserted into the valve body through the inserting core.

In one possible embodiment, the control valve assembly further comprises:

and the one-way valve is arranged on a passage between the oil inlet and the parking reversing valve.

According to a second aspect of embodiments of the present application, there is provided a vehicle including:

the control valve group of any one of the above technical schemes.

Compared with the prior art, the invention at least comprises the following beneficial effects: the control valve group provided by the embodiment of the application comprises a valve body, a parking reversing valve and a gear reversing valve, wherein an oil inlet of the parking reversing valve is communicated with an oil outlet, and an oil inlet of the gear reversing valve is communicated with the oil outlet under the condition that the parking reversing valve does not receive a control signal in the using process; when the parking state of the vehicle needs to be released, a control signal can be provided for the parking reversing valve, so that the oil inlet of the parking reversing valve is positioned at the first oil port, then hydraulic oil is supplied to the parking braking oil port of the valve body, and the vehicle can be parked and unlocked by supplying the hydraulic oil to the parking brake through the parking braking oil port; when the gear needs to be replaced, hydraulic oil flowing out of the first oil port of the parking reversing valve serves as a control signal to be supplied to the gear reversing valve, the gear reversing valve is communicated with the oil inlet and the first oil port, the hydraulic oil can be supplied to the gear control oil port through the first oil port of the gear reversing valve, and the gear control oil port can be communicated to the gear handle, so that the gear function is achieved. The control valve port of gear reversing valve is connected in the first hydraulic fluid port of parking reversing valve through this application embodiment, only can shift under the circumstances that the parking state was liberated, has realized the function of parking and gear interlocking for the control of vehicle is safer. The control valve group that this application embodiment provided is integrated parking switching-over valve and gear switching-over valve on a valve body for the valve body overall arrangement is compacter, and the control of parking and gear is more convenient.

Drawings

Various other advantages and benefits will become apparent to those of ordinary skill in the art upon reading the following detailed description of the preferred embodiments. The drawings are only for purposes of illustrating the preferred embodiments and are not to be construed as limiting the application. Also, like reference numerals are used to refer to like parts throughout the drawings. In the drawings:

FIG. 1 is a schematic block diagram of a control valve block according to an embodiment provided herein;

fig. 2 is a schematic structural diagram of a connection relationship of a control valve group according to an embodiment provided in the present application.

Wherein, the correspondence between the reference numbers and the component names in fig. 1 and fig. 2 is:

the hydraulic control valve comprises a valve body 1, a parking reversing valve 2, a 3-gear reversing valve, a 4-first three-way valve, a 5-speed retarding reversing valve, a 6-speed stabilizing reversing valve, a 7-antiskid reversing valve, an 8-second three-way control valve, a 9-way valve, a 10-first pressure detection oil way, a 11-second pressure detection oil way, a 12-third pressure detection oil way and a 13-fourth pressure detection oil way, wherein the parking reversing valve is arranged on the valve body;

101 oil inlet, 102 oil return port, 103 parking brake port, 104 shift control port, 105 manual pump valve port, 106 motor first discharge port, 107 motor second discharge port, 108 shunting pilot control port, 109 free pilot control port and 110 high pressure end.

Detailed Description

In order to better understand the technical solutions described above, the technical solutions of the embodiments of the present application are described in detail below with reference to the drawings and the specific embodiments, and it should be understood that the specific features of the embodiments and the embodiments of the present application are detailed descriptions of the technical solutions of the embodiments of the present application, and are not limitations of the technical solutions of the present application, and the technical features of the embodiments and the embodiments of the present application may be combined with each other without conflict.

As shown in fig. 1 and fig. 2, according to a first aspect of the embodiment of the present application, a valve body 1 is provided, in which an oil inlet 101, an oil return port 102, a parking brake port 103, and a shift control port 104 are formed on the valve body 1; the parking reversing valve 2 is arranged on the valve body 1, an oil inlet of the parking reversing valve 2 is communicated with an oil inlet 101, an oil outlet of the parking reversing valve 2 is communicated with an oil return port 102, and a first oil port of the parking reversing valve 2 is communicated with a parking braking oil port 103; the gear reversing valve 3 is arranged on the valve body 1, a control valve port of the gear reversing valve 3 is connected to a first oil port of the parking reversing valve 2, an oil inlet of the gear reversing valve 3 is communicated with the oil inlet 101, an oil outlet of the gear reversing valve 3 is communicated with the oil return port 102, and the first oil port of the gear reversing valve 3 is communicated with the gear control oil port 104.

The control valve group provided by the embodiment of the application comprises a valve body 1, a parking reversing valve 2 and a gear reversing valve 3, wherein in the using process, under the condition that the parking reversing valve 2 does not receive a control signal, an oil inlet of the parking reversing valve 2 is communicated with an oil outlet, and an oil inlet of the gear reversing valve 3 is communicated with the oil outlet; when the parking state of the vehicle needs to be released, a control signal can be provided for the parking reversing valve 2, so that the oil inlet of the parking reversing valve 2 is located at the first oil port, then the hydraulic oil is supplied to the parking brake oil port 103 of the valve body 1, and the vehicle can be parked and unlocked by supplying the hydraulic oil to the parking brake through the parking brake oil port 103; when the gear needs to be replaced, the hydraulic oil flowing out of the first oil port of the parking reversing valve 2 serves as a control signal and is supplied to the gear reversing valve 3, the gear reversing valve 3 is communicated with the oil inlet and the first oil port, the hydraulic oil can be supplied to the gear control oil port 104 through the first oil port of the gear reversing valve 3, and the gear control oil port 104 can be communicated to the gear handle, so that the gear function is realized. This application embodiment connects in parking switching-over valve 2's first hydraulic fluid port through the control valve port of gear switching-over valve 3, only can shift under the circumstances that the parking state was relieved, has realized the function of parking and gear interlocking for the control of vehicle is safer. The control valve group that this application embodiment provided is integrated on a valve body 1 with parking switching-over valve 2 and gear switching-over valve 3 for 1 overall arrangement of valve body is compacter, and the control of parking and gear is more convenient.

It can be understood that the gear change-over valve 3 is a hydraulic control valve, and the parking change-over valve 2 is a pneumatic control valve, so as to control the operation of the valve group.

It is understood that oil passages between the parking switch valve 2 and the gear switch valve 3 and the valve ports are formed in the valve body 1.

As shown in fig. 1 and 2, in some examples, the control valve assembly further comprises: the parking brake device comprises a first three-way valve 4, wherein the first three-way valve 4 is arranged on a valve body 1, a manual pump valve port 105 is further formed in the valve body 1, a first valve port of the first three-way valve 4 is communicated with the manual pump valve port 105, a second valve port of the first three-way valve 4 is communicated with a parking brake oil port 103, and a third valve port of the first three-way valve 4 is communicated with a first oil port of a parking reversing valve 2.

The control valve group further comprises a first three-way valve 4, under the normal working state of the vehicle, a third valve port of the first three-way valve 4 is communicated with a second valve port, and in the process that the vehicle needs to be overhauled, the first three-way valve 4 can be rotated, so that the first valve port is communicated with the second valve port, the hand pump can be communicated with the parking brake, and manual parking releasing of the vehicle is achieved.

As shown in fig. 1 and 2, in some examples, the control valve assembly further comprises: the retarding reversing valve 5 is arranged on the valve body 1, a first motor oil discharge port 106 is formed in the valve body 1, an oil inlet of the retarding reversing valve 5 is communicated with the oil inlet 101, an oil outlet of the retarding reversing valve 5 is communicated with the oil return port 102, and a first oil port of the retarding reversing valve 5 is communicated with the first motor oil discharge port 106.

The control valve group also comprises a retarding reversing valve 5, an oil inlet of the retarding reversing valve 5 is communicated with the oil return port 102 under the condition that the retarding reversing valve 5 does not receive a control signal, an oil inlet of the retarding reversing valve 5 is communicated with the first oil port under the condition that the retarding reversing valve 5 receives the control signal, so that hydraulic oil is supplied to the first discharge port 106 of the motor through the retarding reversing valve 5, and the first discharge port 106 of the motor is used for communicating to the large discharge pilot control port of the motor, thereby realizing the low-speed large-torque operation of the vehicle.

This application embodiment can be integrated on a valve body 1 with parking switching-over valve 2, gear switching-over valve 3, slow speed switching-over valve 5 for valve body 1 overall arrangement is compacter.

It can be understood that the slow speed change valve 5 may be a pneumatic control valve, and an oil path between the slow speed change valve 5 and an oil port on the valve body 1 is formed in the valve body 1.

As shown in fig. 1 and 2, in some examples, the control valve assembly further comprises: the speed stabilizing reversing valve 6 is arranged on the valve body 1, a second motor displacement oil port 107 is formed in the valve body 1, an oil inlet of the speed stabilizing reversing valve 6 is communicated with a high-pressure end 110 of the driving system, an oil outlet of the speed stabilizing reversing valve 6 is communicated with an oil return port 102, a first oil port of the speed stabilizing reversing valve 6 is communicated with the second motor displacement oil port 107, and the displacement of the second motor displacement oil port 107 is smaller than that of the slow speed reversing valve 5.

The control valve group also comprises a speed stabilizing reversing valve 6, an oil inlet of the speed stabilizing reversing valve 6 is communicated with the first oil port under the condition that the speed stabilizing reversing valve 6 does not receive a control signal, an oil inlet of the speed stabilizing reversing valve 6 is communicated with the oil return port 102 under the condition that the speed stabilizing reversing valve 6 receives the control signal, a second discharge capacity oil port 107 of the motor is communicated with the oil return port 102, the second discharge capacity oil port 107 of the motor is communicated to an oil tank through the oil return port 102, the discharge capacity of the motor is stabilized at the minimum value, the slow down slope of the vehicle is realized, and the vehicle creep caused by frequent fluctuation of the discharge capacity of the motor is prevented.

It can be understood that the speed stabilizing reversing valve 6 can be a pneumatic control valve, and an oil path between the speed stabilizing reversing valve 6 and the oil port is formed in the valve body 1.

According to the embodiment of the application, the parking reversing valve 2, the gear reversing valve 3, the slow speed reversing valve 5 and the speed stabilizing reversing valve 6 can be integrated on the valve body 1, so that the layout of the valve body 1 is more compact.

As shown in fig. 1 and 2, in some examples, the control valve assembly further comprises: the antiskid reversing valve 7 is arranged on the valve body 1, a shunting pilot control port 108 is formed in the valve body 1, an oil inlet of the antiskid reversing valve 7 is communicated with a first oil port of the speed stabilizing reversing valve 6, an oil outlet of the antiskid reversing valve 7 is communicated with an oil outlet of the speed stabilizing reversing valve 6, and the first oil port of the antiskid reversing valve 7 is communicated with the shunting pilot control port 108.

The control valve group further comprises: when the antiskid reversing valve 7 does not receive a control signal, an oil inlet of the antiskid reversing valve 7 is communicated with an oil outlet, when the control signal is received, an oil inlet of the antiskid reversing valve 7 is communicated with a first oil port, hydraulic oil can be communicated with the shunting pilot control port 108 through the first oil port, forced shunting is performed at the moment, and driving pressure oil and other flows act on each driving wheel, so that the vehicle is prevented from skidding.

In order to avoid the forced shunting function of the vehicle when the motor works at a small displacement, an oil inlet of the anti-skid reversing valve 7 is communicated with a first oil port of the speed-stabilizing reversing valve 6, the anti-skid pneumatic reversing valve and the slow pneumatic reversing valve have an interlocking function, and pressure oil can enter the anti-skid pneumatic reversing valve only when the slow pneumatic reversing valve does not work.

It can be understood that the antiskid reversing valve 7 can be a pneumatic control valve, and an oil path between the speed stabilizing reversing valve 6 and the oil port is formed in the valve body 1.

According to the embodiment of the application, the parking reversing valve 2, the gear reversing valve 3, the retarding reversing valve 5, the speed stabilizing reversing valve 6 and the anti-skid reversing valve 7 can be integrated on the valve body 1, so that the layout of the valve body 1 is more compact.

As shown in fig. 1 and 2, in some examples, the control valve assembly further comprises: and a free pilot control port 109 which is provided in the valve body 1, communicates with the oil inlet 101 through an oil supply line, and is used for communicating with a pilot control port of the flow dividing throttle valve.

The oil inlet 101 can supply oil to the pilot control valve through the free pilot control port 109, so that the pilot control valve is in a conductive state.

As shown in fig. 1 and 2, in some examples, the control valve assembly further comprises: and a second three-way valve 8, wherein a first valve port of the second three-way valve 8 is communicated with a free pilot control port 109, a second valve port is communicated with a manual pump valve port 105 on the valve body 1, and a third valve port is communicated with the oil inlet 101.

The control valve group also comprises a second three-way valve 8, and a first valve port of the second three-way valve 8 is communicated with a third valve port in a normal state; when the vehicle needs to be serviced, the second valve port is communicated with the first valve port, and is used for supplying pressure to the free pilot control port 109 so as to enable the free pilot control port 109 to be in a communicated state.

As shown in fig. 1 and 2, in some examples, the parking directional control valve 2 is a pneumatic directional control valve, and the gear directional control valve 3 is a hydraulic directional control valve; the hydraulic control reversing valve is provided with an inserting core, and the hydraulic control reversing valve is inserted in the valve body 1 through the inserting core.

The parking reversing valve 2 is a pneumatic control reversing valve, and the gear reversing valve 3 is a hydraulic control reversing valve, so that the control of the control valve group is safer and more convenient. The gear reversing valve 3 is fixed in an inserting mode, and installation and maintenance of the gear reversing valve 3 are facilitated.

As shown in fig. 1 and 2, in some examples, the control valve assembly further comprises: and a check valve 9 provided on a passage between the oil inlet 101 and the parking switch valve 2.

The control valve group also comprises a check valve 9, hydraulic oil can be prevented from flowing backwards through the check valve 9, and the control valve group is safer to use.

As shown in fig. 1 and 2, in some examples, the control valve assembly further comprises: a first pressure detection oil path 10 communicated between the oil inlet 101 and the oil return port 102; the second pressure detection oil path 11 is communicated between a high-pressure end 110 of the driving system and the speed stabilizing reversing valve 6; a third pressure detection oil passage 12 communicating between the split pilot control port 108 and the antiskid switching valve 7; the fourth pressure detection oil passage 13 is communicated between the manual pump port 105 and the parking brake port 103.

According to a second aspect of embodiments of the present application, there is provided a vehicle including: the control valve group of any one of the above technical schemes.

The vehicle that this application embodiment provided, because of included the valve unit of any above-mentioned technical scheme, this vehicle possesses all beneficial effects of valve unit.

In some examples, the vehicle may further include a parking brake in communication with the parking brake port 103, a shift handle in communication with the shift control port 104, a manual pump in communication with the manual pump port 105, and a motor high displacement pilot port in communication with the motor first displacement port 106.

In the present invention, the terms "first", "second", and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance; the term "plurality" means two or more unless expressly limited otherwise. The terms "mounted," "connected," "fixed," and the like are to be construed broadly, and for example, "connected" may be a fixed connection, a removable connection, or an integral connection; "coupled" may be direct or indirect through an intermediary. 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 description of the present invention, it is to be understood that the terms "upper", "lower", "left", "right", "front", "rear", and the like indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the referred device or unit must have a specific direction, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present invention.

In the description herein, the description of the terms "one embodiment," "some embodiments," "specific embodiments," etc., means 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 do not necessarily 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.

The above is only a preferred embodiment of the present invention, and is not intended to limit the present invention, and various modifications and changes will occur to those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.