CN212439799U - Three-class chassis for fire engine - Google Patents
Three-class chassis for fire engine Download PDFInfo
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- CN212439799U CN212439799U CN202020699792.7U CN202020699792U CN212439799U CN 212439799 U CN212439799 U CN 212439799U CN 202020699792 U CN202020699792 U CN 202020699792U CN 212439799 U CN212439799 U CN 212439799U
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Abstract
The utility model discloses a three types of chassis for fire engine, include the frame and install on the frame: the power mechanism is used for providing power; the power takeoff is connected with an output shaft of the power mechanism; the transmission is connected with the power mechanism through the power takeoff in a transmission way, when the power mechanism works continuously, a power takeoff output shaft of the power takeoff can be switched between a working state and a non-working state, and the transmission can work continuously under the power takeoff working and non-working states at the upper end of the power takeoff; the main cooling system and the electronic cooler are connected with the power takeoff and the power mechanism and used for cooling the power takeoff and the power mechanism. Its simple structure, overall width is little, is applicable to narrow and small space operation, and the configuration power takeoff can satisfy facial make-up power demand, and the fire control is efficient, and the cooling effect of power takeoff is better for the power takeoff can long-time full power work, and then makes the fire engine that uses this three kinds of chassis can long-time high-power work.
Description
Technical Field
The utility model belongs to the technical field of the car, especially, relate to a three types of chassis for fire engine.
Background
The fire engine can transport firefighters to a disaster site and provide a variety of tools for performing disaster relief tasks. Common fire fighting vehicle types include water tank fire fighting vehicles, foam fire fighting vehicles, pump fire fighting vehicles, elevating platform fire fighting vehicles, aerial ladder fire fighting vehicles, and the like.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide a three types of chassis for fire engine, a structure is simple, the total width is less than 1700mm, be applicable to narrow and small space operation, the configuration power takeoff can satisfy facial make-up power demand, the power takeoff can realize dynamic separation and combine, three types of chassis need not to carry out the later stage repacking and just can satisfy more fire control scenes, the fire control is efficient, the power takeoff cooling effect is good, can long-time full power work, three types of chassis additional function are many, in order to solve at least one problem that above-mentioned prior art exists.
The utility model discloses a following technical scheme realizes:
a class III chassis for a fire fighting vehicle comprising a frame and mounted on the frame: the power mechanism is used for providing power; the power takeoff is connected with an output shaft of the power mechanism; the transmission is connected with the power mechanism through the power takeoff in a transmission mode, when the power mechanism works continuously, a power takeoff output shaft of the power takeoff is switched between a working state and a non-working state, and the transmission works continuously under the upper end power takeoff working state and the non-working state of the power takeoff; the main cooling system and the electronic cooler are connected with the power takeoff and the power mechanism and used for cooling the power takeoff and the power mechanism.
As a further improvement of the above technical solution, the power mechanism is located at a front side of the frame, the power take-off is located at a rear side of the power mechanism, the transmission is located at a rear side of the power take-off, the main cooling system is located at a front side of the power mechanism, and the electronic cooler is located at any side of the power take-off in a left-right direction.
As a further improvement of the above technical solution, in the left-right direction, the power mechanism, the power take-off and the transmission are located in the middle of the frame, and the electronic cooler is located on the left rear side of the power take-off.
As a further improvement of the above technical solution, the vehicle body further comprises an electric winch, a front tow hook and a rear tow hook, wherein the front tow hook and the electric winch are fixed at the front end of the vehicle frame, and the rear tow hook is fixed at the rear end of the vehicle frame.
As a further improvement of the above technical solution, the electric winch is located in the middle of the frame in the left-right direction.
As a further improvement of the above technical solution, the two front towing hooks and the two rear towing hooks are both arranged, the two front towing hooks are symmetrically arranged on two sides of the electric winch, the two rear unhooking hooks are arranged at an interval, and a distance between the rear unhooking hook close to the left side of the frame and the left side of the frame is equal to a distance between the rear unhooking hook close to the right side of the frame and the right side of the frame.
As a further improvement of the above technical solution, the main cooling system and the electronic cooler are air cooling systems.
As a further improvement of the technical scheme, at least two wheels are respectively arranged on the left side and the right side of the frame.
As a further improvement of the technical scheme, the front end of the frame is provided with a front lower protection, and the rear end of the frame is provided with a rear lower protection.
The utility model has the advantages that: the utility model discloses a three types of chassis for fire engine include the frame and install in on the frame: the power mechanism is used for providing power; the power takeoff is connected with an output shaft of the power mechanism; the transmission is in transmission connection with the power mechanism through the power takeoff, when the power mechanism works continuously, a power takeoff output shaft of the power takeoff can be switched between a working state and a non-working state, and the transmission can work continuously under the upper end power takeoff working state and the non-working state of the power takeoff; the main cooling system and the electronic cooler are connected with the power takeoff and the power mechanism and used for cooling the power takeoff and the power mechanism. Its simple structure, overall width is less than 1700mm, be applicable to narrow and small space operation, the configuration power takeoff can satisfy facial make-up power demand, through setting up the power takeoff that can dynamic separation and combine, the power takeoff can realize dynamic separation and combine, three types of chassis need not to carry out the later stage repacking and just can satisfy more fire control scenes, the fire control efficiency is high, through setting up main cooling system and electronic cooler simultaneously, make the power takeoff and the power unit's on these three types of chassis cooling effect better, make the power takeoff can long-time full power work, and then make the fire engine that uses these three types of chassis can long-time high-power work.
Drawings
Fig. 1 is a side view of a novel fire engine chassis provided according to an embodiment of the present invention;
fig. 2 is a front view of a chassis of the novel fire fighting truck provided according to an embodiment of the present invention;
fig. 3 is a top view of a novel fire engine chassis provided according to an embodiment of the present invention;
fig. 4 is a block diagram of a main instrument desk provided according to an embodiment of the present invention;
fig. 5 is a structural diagram of a sub-instrument desk provided according to an embodiment of the present invention;
fig. 6 is a side view of a fire truck chassis provided in accordance with another embodiment of the present invention.
Wherein: the novel fire engine chassis 100, the three-class chassis 1, the power mechanism 10, the frame 11, the power takeoff 12, the rear lower guard 13, the front tow hook 14, the front lower guard 15, the electric winch 16, the rear unhooking 17, the electronic cooler 18, the transmission 19, the cab 2, the warning lamp 21, the camera 22, the door 23, the front door 23a, the rear door 23b, the glass 24, the cab 25, the reflector 26, the windshield 27, the main instrument desk 3, the left portion 31, the steering wheel installation position 32, the middle portion 33, the intercom 34, the megaphone 35, the right portion 36, the air conditioner air outlet 37, the display screen 38, the instrument panel 39, the auxiliary instrument desk 4, the power takeoff control switch 41, the remote throttle button 42 and the cab turnover control switch 43.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. The components of embodiments of the present invention, as generally described and illustrated in the figures herein, may be arranged and designed in a wide variety of different configurations. Thus, the following detailed description of the embodiments of the present invention, presented in the accompanying drawings, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. Based on the embodiment of the present invention, all other embodiments obtained by the person skilled in the art without creative work belong to the protection scope of the present invention.
In the description of the embodiments of the present invention, it should be understood that the terms "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," and the like are used in the orientation or positional relationship indicated in the drawings for convenience in describing the embodiments of the present invention and to simplify the description, and do not indicate or imply that the device or element so indicated must have a particular orientation, be constructed and operated in a particular orientation, and therefore should not be construed as limiting the embodiments of the present invention.
An object of the utility model is to provide a three types of chassis for fire engine, a structure is simple, the total width is less than 1700mm, be applicable to narrow and small space operation, the configuration power takeoff can satisfy facial make-up power demand, the power takeoff can realize dynamic separation and combine, three types of chassis need not to carry out the later stage repacking and just can satisfy more fire control scenes, the fire control is efficient, the power takeoff cooling effect is good, can long-time full power work, three types of chassis additional function are many, in order to solve at least one problem that above-mentioned prior art exists.
As shown in fig. 1 to 3, a three-type chassis 1 for a fire fighting truck according to an embodiment of the present invention is specifically described below.
According to the utility model discloses three types of chassis 1 that the embodiment provided, including frame 11 and the power unit 10, power takeoff 12, derailleur 19, main cooling system and the electron cooler 18 of installing on frame 11, power unit 10 is used for providing power, and power unit 10 can be the engine, also can be the motor; the power takeoff 12 is connected with an output shaft of the power mechanism 10; the transmission 19 is connected with the power mechanism 10 in a transmission way through the power takeoff 12, the power takeoff 12 comprises an input shaft, an output shaft and a power takeoff output shaft, the input shaft of the power takeoff 12 is connected with the output shaft of the power mechanism 10 to transmit the power of the power mechanism 10, the output shaft of the power takeoff 12 is connected with the transmission 19 through a clutch device to transmit the power of the power mechanism 10 to the transmission 19, and the power takeoff output shaft of the power takeoff 12 is provided with a clutch separator, so that when the power mechanism 10 continuously works, the power takeoff output shaft of the power takeoff 12 can be switched between a working state and a non-working state, the power takeoff separation and combination of the upper part can be realized, meanwhile, the power takeoff output shaft at the upper end of the power takeoff can transmit the power of the power mechanism 10 to the transmission 19, and the continuous work of the upper part; a main cooling system and electronic cooler 18 is coupled to the power take-off 12 and the power train 10 for cooling the power take-off 12 and the power train 10.
Through setting up power takeoff 12 that can dynamic separation and combine, can realize novel fire engine chassis 100's facial make-up developments power takeoff, through setting up main cooling system and electron cooler 18 simultaneously for this novel fire engine chassis 100's power takeoff 12 and power unit 10's cooling effect is better, makes power takeoff 12 and power unit 10 can work for a long time the full power, and then makes the novel fire engine chassis 100 who uses this three types of chassis 1 can work for a long time at a high power.
From this make this three types of chassis 1 simple structure, power takeoff 12 can realize the dynamic separation and the combination of power takeoff output, can realize novel fire engine chassis 100's facial make-up dynamic power takeoff, main cooling system and the electronic cooler 18 through setting up for this three types of chassis 1's power takeoff 12 and power unit 10's cooling effect is better, makes power takeoff 12 and power unit 10 can work for a long time the full power, and then makes the novel fire engine chassis 100 who uses this three types of chassis 1 can work for a long time at a high power.
Further, the power mechanism 10 is located at a front side portion of the frame 11, the power take-off 12 is located at a rear portion of the power mechanism 10, the transmission 19 is located at a rear portion of the power take-off 12, the main cooling system is located at a front portion of the power mechanism 10, and the electronic cooler 18 is located at any one side of the power take-off 12 in the left-right direction. The three types of chassis 1 can be made simple and compact in overall structure.
Further, the power mechanism 10, the power take-off 12, and the transmission 19 are located in the middle of the frame 11 in the left-right direction. Therefore, the gravity center of the three-type chassis 1 is concentrated at the center of the three-type chassis 1, and the stability of the three-type chassis 1 is further improved.
Further, the electric winch device further comprises an electric winch 16, a front towing hook 14 and a rear towing hook 17, wherein the front towing hook 14 and the electric winch 16 are fixed at the front end of the frame 11, and the rear towing hook 17 is fixed at the rear end of the frame 11. The setting of electric capstan 16, preceding tow hook 14 and back tow hook 17 can be so that the additional function of three types of chassis 1 is more comprehensive, satisfies novel fire engine chassis 100's fire control demand, need not the secondary repacking of three types of chassis 1.
Further, the electric winch 16 is located in the middle of the vehicle frame 11 in the left-right direction. Therefore, the gravity center of the three-type chassis 1 is concentrated at the center of the three-type chassis 1, and the stability of the three-type chassis 1 is further improved.
Further, the front tow hook 14 and the rear tow hook 17 are both provided with two, the two front tow hooks 14 are symmetrically arranged on two sides of the electric winch 16, the two rear unhooking spaces are arranged, and the distance between the rear unhooking close to the left side of the frame 11 and the left side of the frame 11 is equal to the distance between the rear unhooking close to the right side of the frame 11 and the right side of the frame 11. From this can make three types of chassis 1's additional function more comprehensive, satisfy novel fire engine chassis 100's fire control demand, need not three types of chassis 1's secondary repacking.
Further, both the main cooling system and the electronic cooler 18 are air cooled, wherein the electronic cooler 18 may provide water cooling to the power take-off 12.
Further, at least two wheels are respectively arranged on the left side and the right side of the frame 11.
Further, the width of the three types of chassis 1 is not more than 1700 mm. From this can make the width of this three types of chassis 1 little, and then make the width of novel fire engine chassis 100 be less than 1700mm, conveniently shuttle to pass on the road in narrow and small space.
Further, the front end of the frame 11 is provided with a front lower guard 15, and the rear end is provided with a rear lower guard 13, so as to protect the front end and the rear end of the frame 11, prevent the vehicle from being damaged by collision, and improve the safety of the vehicle.
As shown in fig. 1 to 5, the cab 2 according to the above embodiment of the present invention will be described in detail.
According to the utility model provides a driver's cabin 2, including cockpit 25, main instrument desk 3 and driver's seat, the front side of cockpit 25 is provided with windshield 27, the left and right sides is provided with door 23, main instrument desk 3 and driver's seat are installed in cockpit 25, main instrument desk 3 is located cockpit 25's front portion, driver's seat is located instrument desk's rear and cockpit 25's left part 31, wherein, be provided with intercom 34 and megaphone 35 on the main instrument desk 3 for driver and external communication.
Through integrating intercom 34 and megaphone 35 to main instrument desk 3 for this driver's cabin 2 possesses the function with external communication, need not the repacking in later stage.
Further, be equipped with front and back door window on door 23, the front window is close to the front end frame of door 23 and is extended to the lower frame by the last frame of door 23, and back door window accessible control realizes that glass lifts, and windshield 27's lower extreme is less than the upper end of main instrument desk 3, and the upper end extends to the upper end frame of cockpit 25, and the left end extends to the left end frame of cockpit 25, and the right-hand member extends to the right-hand member frame of cockpit 25. The visual area of the front window and the rear window on the windshield 27 and the vehicle door 23 is enlarged, the visual field of the cab 2 is further enlarged, and the driver can conveniently observe surrounding road conditions in narrow communities or roadways.
Further, main instrument desk 3 includes from left portion 31, middle part 33 and the right part 36 of connecting to the right side in proper order, is provided with display screen 38 on the middle part 33, and display screen 38 is located the upper left corner of middle part 33, and intercom 34 and megaphone 35 are located the lower right corner of middle part 33 and intercom 34 is located the left side of megaphone 35, still is equipped with multi-functional button on the main instrument desk 3. Therefore, the arrangement of the main instrument desk 3 is more orderly, and the operation of a driver is facilitated.
Further, the left portion 31 is provided with an instrument panel 39 and a steering wheel mounting position 32, and the left end of the left portion 31, the left and right ends of the middle portion 33, and the right end of the right portion 36 are provided with air-conditioning outlets 37. This makes it possible to make the driver feel more comfortable.
Further, still include vice instrument desk 4, vice instrument desk 4 is installed in cockpit 25 and is located the right side of driver's seat and the rear side of main instrument desk 3, is provided with power takeoff control switch 41, long-range throttle button 42 driver's cabin upset control switch 43 and multi-functional button on vice instrument desk 4. The driver can control the working state of the vehicle power takeoff 12 by controlling the power takeoff control switch 41, so that the loading work of the novel fire engine chassis 100 can be conveniently controlled; the driver can set the switch of the remote accelerator button 42 to ensure that the novel fire engine chassis 100 can realize remote accelerator operation, thereby facilitating the remote control of the fire engine on the output power of the vehicle during the fire fighting work; the driver can control the overturn of the cab 2 on the three-class chassis 1 of the vehicle by operating the cab overturn control switch 43, which is quick and convenient.
Further, a passenger seat (not shown) is installed in the cockpit 25, the passenger seat is located at the rear side of the main instrument desk 3 and the right side of the passenger seat 4, and a remote start control module (not shown) is arranged below the passenger seat. The remote start control module can realize the remote start function of the vehicle and improve the quick response of the vehicle.
Further, a warning lamp 21 is provided on the top of the cockpit 25, mirrors 26 are provided on the left and right sides of the front end of the cockpit 25, a rear view mirror is provided in the cockpit 25, the rear view mirror is mounted on a front end middle portion 33 on the top end of the cockpit 25, and cameras 22 are provided on the middle portion 33 on the lower side of the front end of the cockpit 25, the right portion 36 on the upper side of the front end, and the left and right portions on the upper side of the rear end. The arrangement of the warning lamp 21 can enable the vehicle to have a warning function so as to prompt other vehicles to avoid; the arrangement of the reflective mirror 26 and the rearview mirror can widen the visual range of the driver, thereby being beneficial to the safe driving of the driver; the camera 22 can be used for displaying the image on the display screen 38 of the vehicle in real time, so that the vehicle has a 360-degree all-round view angle, the surrounding environment can be conveniently observed, and the safe driving of the vehicle is facilitated.
Next, a description is specifically given of a novel fire engine chassis 100 provided in an embodiment of the present invention with reference to fig. 1 to 5.
As shown in fig. 1 to 4, the novel fire fighting truck chassis 100 according to the embodiment of the present invention includes a three-class chassis 1 and a cab 2, wherein the three-class chassis 1 includes a frame 11, and a power mechanism 10, a power takeoff 12 and a transmission 19 mounted on the frame 11, and the power takeoff 12 is connected to an output shaft of the power mechanism 10; the speed changer 19 is in transmission connection with the power mechanism 10 through the power takeoff 12, when the power mechanism 10 continuously works, a power takeoff output shaft of the power takeoff 12 can be dynamically switched between a working state and a non-working state and can continuously work, and the speed changer 19 can continuously work in the upper end power takeoff working state and the non-working state of the power takeoff; cab 2 install in on the frame 11 and including cockpit 25, main instrument desk 3 and driver's seat (not shown in the figure), the front side of cockpit 25 is provided with windshield 27, and the left and right sides is provided with door 23, main instrument desk 3 with driver's seat install in the cockpit 25, main instrument desk 3 is located the front portion of cockpit 25, driver's seat is located the rear of main instrument desk with the left part 31 of cockpit 25, wherein, be provided with intercom 34 and megaphone 35 on the main instrument desk 3 for driver and external communication.
Through the power takeoff 12 that sets up dynamic separation and combination, can improve the dynamic power takeoff of facial make-up, through with intercom 34 and megaphone 35 integration to main instrument desk 3 for this driver's cabin 2 possesses the function with external communication, need not the repacking in later stage. From this make this novel fire engine chassis 100 multiple functional, need not to carry out the later stage repacking and just can satisfy more fire scenes, the fire control is efficient.
As shown in fig. 6, the present application provides another embodiment. This embodiment differs from the embodiment shown in fig. 1 to 5 in that a double row of seats is provided in the cab.
The fire fighting vehicle chassis shown in the embodiment shown in fig. 1 to 5 is a single-row seat fire fighting vehicle chassis; the fire fighting truck chassis shown in the embodiment shown in fig. 6 is a double-row seat fire fighting truck chassis.
As shown in fig. 6, the cab has a front door 23a and a rear door 23b, respectively. In the embodiment, 2 to 3 passengers can sit in the front row of seats of the cab, and 3 air breathing seats are arranged in the rear row of seats.
The utility model discloses a novel fire engine chassis, through setting up the power takeoff that can dynamic separation and combine, can realize the dynamic power takeoff of facial make-up, through will talkbacking radio and megaphone integration to main instrument desk for this driver's cabin possesses the function with external communication, need not the repacking in later stage, through the remote start module who sets up, can realize the remote start of vehicle, improve the quick response of vehicle, through arranging of camera, can realize 360 looks around of vehicle, observe the environment of traveling of vehicle betterly. From this make this novel fire engine chassis multiple functional, need not to carry out the later stage repacking and just can satisfy more fire scenes, the fire control is efficient.
In the description of the present invention, the term "three-type chassis" refers to a chassis that is equipped with an engine and transmission, a front and rear axle, a steering gear, a suspension device, wheels and tires, a brake system, and the like, but does not include a cab. Incidentally, the term "one type of chassis" means: the whole vehicle comprises all system answers. The term "class two chassis" refers to: a vehicle chassis has been assembled with an engine, a transmission, a drive train and a cab, but without a cargo box.
In the description of the present invention, the terms "first", "second", "further" and "further" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implying a number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more features. In the description of the embodiments of the present invention, "a plurality" means two or more unless specifically limited otherwise.
In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "connected" and "connected" are to be interpreted broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; may be directly connected or indirectly connected through an intermediate. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art. In addition, in the description of the present invention, "a plurality" means two or more unless otherwise specified.
While embodiments of the present invention have been shown and described, it will be understood by those of ordinary skill in the art that: various changes, modifications, substitutions and alterations can be made to the embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the claims and their equivalents.
Claims (9)
1. A three kinds of chassis for fire engine, its characterized in that includes the frame and installs on the frame:
the power mechanism is used for providing power;
the power takeoff is connected with an output shaft of the power mechanism;
the transmission is connected with the power mechanism through the power takeoff in a transmission mode, when the power mechanism works continuously, a power takeoff output shaft of the power takeoff is switched between a working state and a non-working state, and the transmission works continuously under the upper end power takeoff working state and the non-working state of the power takeoff;
the main cooling system and the electronic cooler are connected with the power takeoff and the power mechanism and used for cooling the power takeoff and the power mechanism.
2. The chassis of claim 1, wherein the power mechanism is located at a front side of the frame, the power take-off is located at a rear side of the power mechanism, the transmission is located at a rear side of the power take-off, the main cooling system is located at a front side of the power mechanism, and the electric cooler is located at any one of left and right sides of the power take-off.
3. The class III chassis of claim 2, wherein the power mechanism, the power take-off and the transmission are located in the middle of the frame in the left-right direction, and the electronic cooler is located on the left rear side of the power take-off.
4. The class III chassis of claim 1, further comprising an electric winch, a front tow hook and a rear tow hook, the front tow hook and the electric winch being secured to a front end of the frame, the rear tow hook being secured to a rear end of the frame.
5. The class III chassis of claim 4, wherein the electric winch is located in the middle of the frame in the left-right direction.
6. The chassis according to claim 5, wherein there are two front towing hooks and two rear towing hooks, the two front towing hooks are symmetrically arranged on two sides of the electric winch, the two rear unhooking hooks are arranged at intervals, and the distance between the rear unhooking hook close to the left side of the frame and the left side of the frame is equal to the distance between the rear unhooking hook close to the right side of the frame and the right side of the frame.
7. The class III chassis of claim 1, wherein the primary cooling system and the electronic cooler are air-cooled systems.
8. The three-type chassis according to claim 1, wherein at least two wheels are provided on each of the left and right sides of the frame.
9. The three-class chassis according to claim 1, wherein the front end of the frame is provided with a front lower guard, and the rear end is provided with a rear lower guard.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020699792.7U CN212439799U (en) | 2020-04-29 | 2020-04-29 | Three-class chassis for fire engine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020699792.7U CN212439799U (en) | 2020-04-29 | 2020-04-29 | Three-class chassis for fire engine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN212439799U true CN212439799U (en) | 2021-02-02 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202020699792.7U Active CN212439799U (en) | 2020-04-29 | 2020-04-29 | Three-class chassis for fire engine |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN212439799U (en) |
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2020
- 2020-04-29 CN CN202020699792.7U patent/CN212439799U/en active Active
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