CN214788857U - Transmission mechanism, gearbox and crawler-type small agricultural machine or transport vehicle - Google Patents
Transmission mechanism, gearbox and crawler-type small agricultural machine or transport vehicle Download PDFInfo
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- CN214788857U CN214788857U CN202120832279.5U CN202120832279U CN214788857U CN 214788857 U CN214788857 U CN 214788857U CN 202120832279 U CN202120832279 U CN 202120832279U CN 214788857 U CN214788857 U CN 214788857U
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Abstract
The utility model discloses a transmission mechanism, which is characterized by comprising a first transmission wheel and a second transmission wheel; the first driving wheel and the second driving wheel rotate reversely; the first transmission wheel is provided with a first clutch, the first clutch is provided with a first transmission mechanism, and the first transmission mechanism is in transmission connection with a first output wheel and/or a second output wheel; a second clutch is arranged on the second transmission wheel, a second transmission mechanism is arranged on the second clutch, and the second transmission mechanism is in transmission connection with a first output wheel and/or a second output wheel; the first output wheel and the second output wheel are respectively and directly or indirectly connected with crawler driving wheels on two sides of the small agricultural machine; and discloses a gearbox and a crawler-type small agricultural machine or transport vehicle. The problem of when little agricultural machinery of crawler-type or transport vechicle turn round, turning radius is big to and the violent slip of track when turning round rubs the very big increase track and generate heat and the wearing and tearing problem.
Description
Technical Field
The utility model relates to a drive mechanism of little agricultural machinery, concretely relates to gearbox suitable for little agricultural machinery of crawler-type or transport vechicle.
Background
At present, the small agricultural machine is widely used in agricultural production, and the application environment of the small agricultural machine is complex, so that the requirements are provided for the stable operation of the small agricultural machine in various complex terrains in agricultural production; the crawler-type agricultural machinery transport vehicle adopts the crawler-type traveling mechanism, so that the capacities of different operation environments and different operation forms are enhanced.
The traditional steering mode of the crawler-type small agricultural machine or the crawler-type transport vehicle is that a single-side crawler is braked, and the steering mode is realized by the mode that the crawler is continuously driven by the other side, so that the steering mode is difficult to obtain stable steering, and then severe friction wear is greatly increased to generate heat and the crawler is abraded in the steering process, particularly in a heavy-load steering state, so that the poor working reliability and the service life are reduced, the turning radius of the crawler-type small agricultural machine is large, and the operation mode and the operation environment of the crawler-type agricultural machine are limited.
SUMMERY OF THE UTILITY MODEL
The utility model aims to solve the little agricultural machinery of crawler-type or the transport vechicle when turning round, the big problem of turning radius to and the problem of the violent slip friction of track when turning round very big increase track generate heat and the wearing and tearing, provide a drive mechanism, carry out special direction through the track drive wheel of the little agricultural machinery both sides of simultaneous braking, solve above-mentioned problem.
In order to achieve the above purpose, the technical scheme of the utility model is as follows:
according to an aspect of the present invention, there is provided a transmission mechanism, comprising a first transmission wheel and a second transmission wheel; the first driving wheel and the second driving wheel rotate reversely; the first driving wheel and the second driving wheel are gears and the like;
the first transmission wheel is provided with a first clutch, the first clutch is provided with a first transmission mechanism, and the first transmission mechanism is in transmission connection with a first output wheel and/or a second output wheel;
a second clutch is arranged on the second transmission wheel, a second transmission mechanism is arranged on the second clutch, and the second transmission mechanism is in transmission connection with a first output wheel and/or a second output wheel; the first output wheel and the second output wheel are gears or belt pulleys and the like;
the first output wheel and the second output wheel are respectively and directly or indirectly connected with crawler driving wheels on two sides of the small agricultural machine;
when the first clutch is braked and the first transmission wheel drives the first output wheel and/or the second output wheel to rotate forwards, the second clutch is not braked and the crawler-type small agricultural machine or the transport vehicle moves forwards;
when the second clutch is braked, power is transmitted to the second transmission wheel through the first transmission wheel, and the second transmission wheel drives the first output wheel and/or the second output wheel to rotate backwards, the first clutch is not braked, and the crawler-type small agricultural machine moves backwards;
when the first clutch brake is performed, the first transmission wheel drives one of the first output wheel and the second output wheel to rotate forwards, meanwhile, the second clutch brake is performed, power is transmitted to the second transmission wheel through the first transmission wheel, the second transmission wheel drives the other one of the second output wheel and the first output wheel to rotate backwards, and at the moment, the small agricultural machine realizes steering.
Compared with the prior art, the utility model has the advantages that the crawler driving wheels on both sides of the small agricultural machine can be simultaneously rotated forwards or simultaneously in the same direction or backwards or simultaneously in the reverse direction by respectively or simultaneously braking the first clutch and the second clutch, so that the small agricultural machine can move forwards, backwards or turn; the first transmission mechanism and the second transmission mechanism are in transmission connection with the first output wheel and the second output wheel, and the braking of the first clutch and the second clutch is controlled through the clutch to realize the switching of various functions, so that the whole transmission mechanism is compact in design, can be designed in a gearbox, and saves space; because above-mentioned scheme can realize when turning round, the direct antiport of the track drive wheel of little agricultural machinery both sides, therefore when little agricultural machinery of crawler-type or transport vechicle turn round, turning radius is little, and both sides track is rolling friction, has avoided violent slip to rub and has leaded to the problem that very big track generates heat and the wearing and tearing of wearing and tearing.
Further, a first clutch is arranged on the left side and/or the right side of the first transmission wheel; the first clutch comprises a first driving friction plate, a first driven friction plate and a first hydraulic oil cylinder control piston; the first driving friction plate is directly or indirectly connected with the first driving wheel; the first clutch is provided with two first clutches which are respectively positioned at two sides of the first driving wheel, or is provided with one first clutch, the first driving wheel is sleeved on the first clutch, or is provided with one first clutch positioned at one side of the first driving wheel; and/or
A second clutch is arranged on the left side and/or the right side of the second transmission wheel; the second clutch comprises a second driving friction plate, a second driven friction plate and a second hydraulic cylinder control piston; the second driving friction plate is directly or indirectly connected with a second driving wheel; the second clutch is provided with two parts which are respectively positioned at two sides of the second driving wheel, or is provided with a second clutch, the second driving wheel is sleeved on the second clutch, or is provided with a second clutch positioned at one side of the second driving wheel, and the like.
The technical scheme adopted in the previous step has the beneficial effects that a first clutch is arranged on the left side and/or the right side of the first driving wheel, and a second clutch is arranged on the left side and/or the right side of the second driving wheel; the first clutch brake is used for transmitting the power of the first transmission wheel to the first output wheel and/or the second output wheel, and the second clutch brake is used for transmitting the power of the first transmission wheel to the first output wheel and/or the second output wheel.
The first clutch further comprises a third driven friction plate and a third hydraulic oil cylinder control piston, the first driven friction plate and the third driven friction plate are respectively positioned on two sides of the first driving wheel, and the first driven friction plate and the third driven friction plate are respectively connected with a first transmission mechanism; the clutch is realized by arranging one first clutch comprising a first driven friction plate and a third driven friction plate, or arranging two first clutches comprising the first driven friction plate and the third driven friction plate respectively; and/or
The second clutch also comprises a fourth driven friction plate and a fourth hydraulic oil cylinder control piston,
the second driven friction plate and the fourth driven friction plate are respectively positioned at two sides of the second driving wheel and are respectively connected with a second driving mechanism; the clutch is realized by arranging a second clutch comprising a second driven friction plate and a fourth driven friction plate, or arranging two second clutches comprising the second driven friction plate and the fourth driven friction plate respectively.
The technical scheme has the advantages that the first driven friction plate and the third driven friction plate are respectively connected with the first transmission mechanism, the second driven friction plate and the fourth driven friction plate are respectively connected with the second transmission mechanism, braking of the first clutch is achieved, and power of the first transmission wheel can be simultaneously transmitted to the first output wheel and the second output wheel.
Further, the first transmission mechanism comprises a first external gear, and the first external gear is connected with the first driven friction plate and/or the third driven friction plate; the first output wheel and the second output wheel are gears, and the first external gear is meshed with the first output wheel and/or the second output wheel; the transmission mechanism is realized by arranging one first external gear to be connected with the first driven friction plate or the third driven friction plate, or arranging two first external gears to be respectively connected with the first driven friction plate and the third driven friction plate;
the second transmission mechanism comprises a second external gear, and the second external gear is connected with a second driven friction plate and/or a fourth driven friction plate and is meshed with the first output wheel and/or the second output wheel; the clutch is realized by arranging a second external gear to be connected with a second driven friction plate or a fourth driven friction plate, or by arranging two second external gears to be respectively connected with the second driven friction plate and the fourth driven friction plate;
or
The first transmission mechanism comprises a first belt pulley; the first belt pulley is connected with the first driven friction plate and/or the third driven friction plate, and is connected with the first output wheel and/or the second output wheel through a belt; the friction plate is connected with the first driven friction plate or the third driven friction plate through the arrangement of a first belt pulley, or is connected with the first driven friction plate and the third driven friction plate through the arrangement of two first belt pulleys;
the second transmission mechanism comprises a second belt pulley; the second belt pulley is connected with the second driven friction plate and/or the fourth driven friction plate and is connected with the first output wheel and/or the second output wheel through a belt; the second belt pulley is connected with the second driven friction plate or the fourth driven friction plate, or the two second belt pulleys are respectively connected with the second driven friction plate and the fourth driven friction plate.
The technical scheme has the advantages that the first transmission mechanism is provided with the first outer gear or the first belt pulley, so that the first transmission mechanism transmits power to the first output wheel and/or the second output wheel; and a second external gear or a second belt pulley is arranged on the second transmission mechanism, so that the second transmission mechanism transmits power to the first output wheel and/or the second output wheel.
Furthermore, the first transmission mechanism further comprises a first mounting shaft, and the first mounting shaft is used for being connected with the first driving wheel and sequentially penetrating through the first external gear and the first clutch;
the first transmission mechanism further comprises a second mounting shaft, and the second mounting shaft is used for being connected with a second transmission wheel and sequentially penetrates through a second external gear and a second clutch;
or
The first transmission mechanism further comprises a first mounting shaft, and the first mounting shaft is used for being connected with the first driving wheel and sequentially penetrating through the first belt pulley and the first clutch;
the first transmission mechanism further comprises a second installation shaft, and the second installation shaft is used for being connected with the second transmission wheel and sequentially penetrating through the second belt pulley and the second clutch.
The technical scheme adopted in the previous step has the beneficial effects that the first driving wheel and the first transmission mechanism are fixed through the first mounting shaft; the second driving wheel and the second driving mechanism are fixed through the second mounting shaft, so that the driving mechanism can stably operate.
Furthermore, the first driving wheel and the second driving wheel are gears, and the first driving wheel and the second driving wheel are connected through external meshing.
The beneficial effect who adopts one-step technical scheme lies in, is connected through the external toothing through first drive wheel and second drive wheel, realizes that first drive wheel and second drive wheel rotation direction are opposite.
Another aspect of the present invention provides a transmission, including the transmission mechanism.
Compared with the prior art, the utility model has the advantages that the crawler driving wheels on both sides of the small agricultural machine can be realized through the transmission mechanism, and the small agricultural machine can move forwards, backwards or turn forwards and backwards simultaneously; the whole transmission mechanism is compact in design and is designed in the gearbox, so that the space is saved; when the crawler-type small agricultural machine or the transport vehicle turns, the turning radius is small, the crawler belts on the two sides are rolling friction, and the problem that the severe sliding friction causes the heat generation and the abrasion of the crawler belts is avoided.
Furthermore, the gearbox also comprises a power input shaft, the power input shaft is connected with the engine, and an input gear shifting gear is connected to the power input shaft;
and the power output shaft is connected with an output shifting gear meshed with the input shifting gear and a first intermediate gear, and the first intermediate gear is used for driving the first driving wheel and/or the second driving wheel to rotate.
Adopt one-step technical scheme's beneficial effect to lie in, realize through above-mentioned design that engine power transmits for the track drive wheel, and realize shifting transmission power and turn to.
Furthermore, the gearbox further comprises an intermediate transmission shaft, and a second intermediate gear and a third intermediate gear which are respectively meshed with the first intermediate gear and the first transmission wheel are connected onto the intermediate transmission shaft.
The technical scheme adopted in the previous step has the beneficial effects that the power of the power output shaft is output to the intermediate transmission shaft through the meshing of the first intermediate gear and the second intermediate gear; the third intermediate gear is meshed with the first driving wheel, so that the power of the intermediate driving shaft is transmitted to the first driving wheel.
Another aspect of the utility model provides a little agricultural machinery of crawler-type or transport vechicle, include drive mechanism.
Compared with the prior art, the utility model has the advantages that the small agricultural machinery can simultaneously move forwards in the same direction or backwards in the same direction or simultaneously rotate reversely through the transmission mechanism, so that the small agricultural machinery can move forwards, backwards or turn; the small agricultural machine has high space utilization rate and small design volume, and is beneficial to the work of various complex terrains; when the crawler-type small agricultural machine or the transport vehicle turns, the turning radius is small, the crawler belts on the two sides are rolling friction, and the problem that the severe sliding friction causes the heat generation and the abrasion of the crawler belts is avoided.
Further, the first clutch and the second clutch are hydraulic clutches; the crawler-type small agricultural machine or the transport vehicle also comprises a crawler driving wheel which is respectively connected with the first output wheel and the second output wheel; the engine oil-way is provided with a distribution valve and a hydraulic reversing valve; and the engine output pump is connected with the hydraulic oil cylinder control pistons of the first clutch and the second clutch through the hydraulic oil duct.
The utility model has the advantages of relative to prior art, be equipped with the distributing valve on through the hydraulic pressure oil duct, the hydraulic pressure switching-over valve, access to first hydraulic cylinder control piston with hydraulic oil as required, second hydraulic cylinder control piston, third hydraulic cylinder control piston, one or two in the fourth hydraulic cylinder control piston, thereby realize the first separation and reunion of braking and/or the second separation and reunion, realize the track drive wheel corotation simultaneously or the reversal simultaneously or the opposite direction operation simultaneously of crawler-type little agricultural machinery or transport vechicle both sides, realize the advance of crawler-type little agricultural machinery or transport vechicle or retreat or turn to.
Drawings
Fig. 1 is a structural diagram of a transmission mechanism according to embodiment 1 of the present invention.
Fig. 2 is a structural diagram of a transmission according to embodiment 1 of the present invention.
The reference numbers shown in the figures: 1. a right second external gear; 2. a second transmission wheel; 3. a left second external gear; 4. a first output wheel; 5. a second output wheel; 7. a right first external gear; 8. A left first external gear; 9. a first drive pulley; 10. a third intermediate gear; 11. a second intermediate gear; 12. a first intermediate gear; 13. an output shift gear; 14. an input shift gear; 15. A second clutch; 16. a first clutch; 17. a first mounting shaft; 18. a second mounting shaft; 19. a power input shaft; 20. a power take-off shaft; 21. an intermediate drive shaft.
Detailed Description
In order to better understand the technical solution of the present invention, the present invention will be further explained with reference to the following specific embodiments and the accompanying drawings.
Example 1:
two second clutches 15 are arranged on the second driving wheel 2, and the two second clutches 15 are a left second clutch and a right second clutch and are respectively positioned on two sides of the second driving wheel 2; a second transmission mechanism is arranged on the second clutch 15 and is in transmission connection with a first output wheel 4 and a second output wheel 5; the second transmission mechanism comprises a left second external gear 3, a right second external gear 1 and a second mounting shaft 18, and the left second external gear 3, a left second clutch, a second transmission wheel 2, the right second clutch and the right second external gear 1 are sequentially fixed on the second mounting shaft 18; the left second external gear 3 and the right second external gear 1 are respectively meshed with a first output wheel 4 and a first output wheel 5;
the first output wheel 4 and the second output wheel 5 are respectively and directly connected with crawler driving wheels at two sides of the small agricultural machine.
The first clutch 16 is a hydraulic clutch, the left first clutch comprises a first driving friction plate, a first driven friction plate and a first hydraulic oil cylinder control piston, and the right first clutch comprises a first driving friction plate, a third driven friction plate and a third hydraulic oil cylinder control piston; the first driving friction plate is directly connected with the first driving wheel 9; the first driven friction plate and the third driven friction plate are respectively connected with the left first external gear and the right first external gear;
the second clutch 15 is a hydraulic clutch, the left second clutch comprises a second driving friction plate, a second driven friction plate and a second hydraulic cylinder control piston, and the right second clutch comprises a second driving friction plate, a fourth driven friction plate and a fourth hydraulic cylinder control piston; the second driving friction plate is directly connected with the second transmission wheel 2; and the second driven friction plate and the fourth driven friction plate are respectively connected with the left second external gear and the right second external gear.
Another aspect of the present embodiment provides a gearbox comprising the transmission mechanism as described.
The gearbox also comprises a power input shaft 19, wherein the power input shaft 19 is connected with the engine, and an input gear shifting gear 14 is connected onto the power input shaft 19;
a power take-off shaft 20 to which an output shift gear 13 and a first intermediate gear 12 that mesh with the input shift gear 14 are connected;
the gearbox also comprises an intermediate transmission shaft 21, and a second intermediate gear 11 and a third intermediate gear 10 which are respectively meshed with the first intermediate gear 12 and the first transmission wheel 9 are connected to the intermediate transmission shaft 21.
Another aspect of the present embodiment provides a small agricultural crawler machine or transport vehicle, including the transmission mechanism.
The crawler-type small agricultural machine or the transport vehicle also comprises crawler driving wheels which are respectively connected with the first output wheel 4 and the second output wheel 5; the engine oil-way is provided with a distribution valve and a hydraulic reversing valve; and the engine output pump is connected with a first hydraulic oil cylinder control piston, a second hydraulic oil cylinder control piston, a third hydraulic oil cylinder control piston and a fourth hydraulic oil cylinder control piston of the first clutch 16 and the second clutch 15 through the hydraulic oil ducts.
Example 2:
the same contents of the transmission mechanism of the present embodiment as those of embodiment 1 are not repeated; a first clutch is arranged on the first driving wheel 9 and comprises a first driving friction plate, a first driven friction plate, a third hydraulic oil cylinder control piston and a third hydraulic oil cylinder control piston; and a second clutch is arranged on the second transmission wheel 2 and comprises a second driving friction plate, a second driven friction plate, a fourth driven friction plate, a second hydraulic cylinder control piston and a fourth hydraulic cylinder control piston.
The first driving wheel 9 is provided with a first clutch, and the left first external gear 8, the first clutch and the right first external gear 7 are sequentially fixed on the first mounting shaft 17; the first transmission wheel 9 is sleeved on the first clutch; a second clutch is arranged on the second transmission wheel 2, and the left second external gear 3, the first clutch and the right second external gear 3 are sequentially fixed on the second mounting shaft 18; the first transmission wheel 2 is sleeved on the second clutch.
The above description is only a preferred embodiment of the application and is illustrative of the principles of the technology employed. It will be appreciated by a person skilled in the art that the scope of the invention as referred to in the present application is not limited to the embodiments with a specific combination of the above-mentioned features, but also covers other embodiments with any combination of the above-mentioned features or their equivalents without departing from the inventive concept. For example, the features described above have similar functions to (but are not limited to) those disclosed in this application.
Claims (10)
1. A transmission mechanism is characterized by comprising a first transmission wheel (9) and a second transmission wheel (2); the first driving wheel (9) and the second driving wheel (2) rotate reversely;
a first clutch (16) is arranged on the first transmission wheel (9), a first transmission mechanism is arranged on the first clutch (16), and the first transmission mechanism is in transmission connection with a first output wheel (4) and/or a second output wheel (5);
a second clutch (15) is arranged on the second transmission wheel (2), a second transmission mechanism is arranged on the second clutch, and the second transmission mechanism is in transmission connection with a first output wheel (4) and/or a second output wheel (5);
the first output wheel (4) and the second output wheel (5) are respectively and directly or indirectly connected with crawler belt driving wheels on two sides of the small agricultural machine.
2. A transmission mechanism according to claim 1, characterised in that the first drive wheel (9) is provided with a first clutch on the left and/or right side; the first clutch comprises a first driving friction plate, a first driven friction plate and a first hydraulic oil cylinder control piston; the first driving friction plate is directly or indirectly connected with a first driving wheel (9);
and/or
A second clutch is arranged on the left side and/or the right side of the second transmission wheel (2); the second clutch comprises a second driving friction plate, a second driven friction plate and a second hydraulic cylinder control piston; the second driving friction plate is directly or indirectly connected with the second transmission wheel (2).
3. A transmission according to claim 2,
the first clutch also comprises a third driven friction plate and a third hydraulic oil cylinder control piston, the first driven friction plate and the third driven friction plate are respectively positioned at two sides of the first driving wheel, and the first driven friction plate and the third driven friction plate are respectively connected with a first transmission mechanism;
and/or
The second clutch further comprises a fourth driven friction plate and a fourth hydraulic oil cylinder control piston, the second driven friction plate and the fourth driven friction plate are respectively located on two sides of the second driving wheel, and the second driven friction plate and the fourth driven friction plate are respectively connected with a second transmission mechanism.
4. A transmission according to claim 2 or 3, wherein the first transmission comprises a first external gear which is connected to the first driven friction plate and/or the third driven friction plate; the first output wheel (4) and the second output wheel (5) are gears, and the first external gear is meshed with the first output wheel (4) and/or the second output wheel (5);
the second transmission mechanism comprises a second external gear, the second external gear is connected with a second driven friction plate and/or a fourth driven friction plate and is meshed with the first output wheel (4) and/or the second output wheel (5);
or
The first transmission mechanism comprises a first belt pulley; the first belt pulley is connected with the first driven friction plate and/or the third driven friction plate, and is connected with the first output wheel and/or the second output wheel through a belt;
the second transmission mechanism comprises a second belt pulley; the second belt pulley is connected with the second driven friction plate and/or the fourth driven friction plate, and is connected with the first output wheel and/or the second output wheel through a belt.
5. A transmission according to claim 4, characterized in that it further comprises a first mounting shaft for connection to the first drive wheel (9) and passing through the first external gear, the first clutch in turn;
the first transmission mechanism further comprises a second mounting shaft, and the second mounting shaft is used for being connected with a second transmission wheel (2) and sequentially penetrates through a second external gear and a second clutch;
or
The first transmission mechanism further comprises a first mounting shaft, and the first mounting shaft is used for being connected with a first driving wheel (9) and sequentially penetrates through a first belt pulley and a first clutch;
the first transmission mechanism further comprises a second installation shaft, and the second installation shaft is used for being connected with the second transmission wheel (2) and sequentially penetrates through the second belt pulley and the second clutch.
6. A transmission mechanism as claimed in claim 1 or 2, wherein the first drive wheel (9) and the second drive wheel (2) are toothed wheels, the first drive wheel and the second drive wheel being connected by external engagement.
7. A gearbox comprising a transmission according to any one of claims 1 to 6.
8. A gearbox according to claim 7 further comprising a power input shaft, said power input shaft being connected to the engine, said power input shaft having an input gear shift connected thereto;
and the power output shaft is connected with an output shifting gear meshed with the input shifting gear and a first intermediate gear, and the first intermediate gear is used for driving the first transmission wheel (9) and/or the second transmission wheel (2) to rotate.
9. A tracked agricultural small machine or transport vehicle comprising a transmission according to any one of claims 1 to 6.
10. The small tracked agricultural machine or carrier vehicle of claim 9, wherein the first clutch and the second clutch are hydraulic clutches;
the crawler belt driving wheel is respectively connected with the first output wheel (4) and the second output wheel (5);
the engine oil-way is provided with a distribution valve and a hydraulic reversing valve;
and the engine output pump is connected with the hydraulic oil cylinder control pistons of the first clutch and the second clutch through the hydraulic oil duct.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120832279.5U CN214788857U (en) | 2021-04-22 | 2021-04-22 | Transmission mechanism, gearbox and crawler-type small agricultural machine or transport vehicle |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120832279.5U CN214788857U (en) | 2021-04-22 | 2021-04-22 | Transmission mechanism, gearbox and crawler-type small agricultural machine or transport vehicle |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN214788857U true CN214788857U (en) | 2021-11-19 |
Family
ID=78688502
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202120832279.5U Active CN214788857U (en) | 2021-04-22 | 2021-04-22 | Transmission mechanism, gearbox and crawler-type small agricultural machine or transport vehicle |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN214788857U (en) |
-
2021
- 2021-04-22 CN CN202120832279.5U patent/CN214788857U/en active Active
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