CN116750693A - Carrier and storage battery locking device thereof - Google Patents
Carrier and storage battery locking device thereof Download PDFInfo
- Publication number
- CN116750693A CN116750693A CN202310750259.7A CN202310750259A CN116750693A CN 116750693 A CN116750693 A CN 116750693A CN 202310750259 A CN202310750259 A CN 202310750259A CN 116750693 A CN116750693 A CN 116750693A
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- plate
- pressing plate
- battery
- state
- vertical
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- 238000003860 storage Methods 0.000 title claims abstract description 40
- 238000003825 pressing Methods 0.000 claims abstract description 72
- 238000005452 bending Methods 0.000 claims abstract description 36
- 239000000463 material Substances 0.000 claims description 3
- 238000005096 rolling process Methods 0.000 claims description 2
- 238000003466 welding Methods 0.000 claims description 2
- 230000009471 action Effects 0.000 description 3
- 230000007246 mechanism Effects 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 230000008859 change Effects 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000003014 reinforcing effect Effects 0.000 description 1
- 238000005728 strengthening Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60K—ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES
- B60K1/00—Arrangement or mounting of electrical propulsion units
- B60K1/04—Arrangement or mounting of electrical propulsion units of the electric storage means for propulsion
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
- B60L50/00—Electric propulsion with power supplied within the vehicle
- B60L50/50—Electric propulsion with power supplied within the vehicle using propulsion power supplied by batteries or fuel cells
- B60L50/60—Electric propulsion with power supplied within the vehicle using propulsion power supplied by batteries or fuel cells using power supplied by batteries
- B60L50/66—Arrangements of batteries
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66F—HOISTING, LIFTING, HAULING OR PUSHING, NOT OTHERWISE PROVIDED FOR, e.g. DEVICES WHICH APPLY A LIFTING OR PUSHING FORCE DIRECTLY TO THE SURFACE OF A LOAD
- B66F9/00—Devices for lifting or lowering bulky or heavy goods for loading or unloading purposes
- B66F9/06—Devices for lifting or lowering bulky or heavy goods for loading or unloading purposes movable, with their loads, on wheels or the like, e.g. fork-lift trucks
- B66F9/075—Constructional features or details
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60K—ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES
- B60K1/00—Arrangement or mounting of electrical propulsion units
- B60K1/04—Arrangement or mounting of electrical propulsion units of the electric storage means for propulsion
- B60K2001/0455—Removal or replacement of the energy storages
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
- B60L2200/00—Type of vehicles
- B60L2200/40—Working vehicles
- B60L2200/42—Fork lift trucks
Landscapes
- Engineering & Computer Science (AREA)
- Transportation (AREA)
- Mechanical Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- Structural Engineering (AREA)
- Sustainable Development (AREA)
- Chemical & Material Sciences (AREA)
- Sustainable Energy (AREA)
- Power Engineering (AREA)
- Civil Engineering (AREA)
- Combustion & Propulsion (AREA)
- Geology (AREA)
- Battery Mounting, Suspending (AREA)
Abstract
The invention relates to a storage battery locking structure of a carrier, which comprises a mounting plate fixed on a front frame, wherein a vertical plate is arranged on the mounting plate and is hinged with the front end of a pressing plate, and the front end of the pressing plate is provided with a bending plate facing the mounting plate; the pressing plate rotates around the vertical plate to be switched between a locking state and an unfolding state, the bending plate at the front end of the pressing plate presses the storage battery in the locking state, and the pressing plate drives the bending plate to be separated from the storage battery in the unfolding state, so that the limit of the storage battery is relieved. The invention also relates to a carrier with the storage battery locking structure. The battery locking device is simple and convenient in operation principle, and the battery is assembled and disassembled without other tools, so that the replacement speed of the battery is improved.
Description
Technical Field
The invention relates to the technical field of carrier vehicles, in particular to a storage battery locking device of a carrier vehicle.
Background
Along with the rapid development of logistics in China, the pedal type carrier is used more and more frequently, and in the prior art, the total components of the front frame part of the pedal type carrier are as follows: non-side pull type, side pull type. The side pull type storage battery is provided with the following two storage battery mounting modes: 1. the storage battery is placed on the storage battery bottom plate and fixed by installing the detachable side plate, so that the processing technology has higher precision requirement and poorer economy; 2. the storage battery is placed on the storage battery bottom plate and fixed by bolts, so that the practicability is poor.
Disclosure of Invention
In order to solve the problems, the invention aims to provide a carrier and a battery locking device thereof, wherein the operation principle of the battery locking device is simple and convenient, and the battery is assembled and disassembled without other tools, so that the replacement speed of the battery is improved.
The battery locking structure of the carrier comprises a mounting plate fixed on a front frame, wherein a vertical plate is arranged on the mounting plate and is hinged with the front end of a pressing plate, and the front end of the pressing plate is provided with a bending plate facing the mounting plate; the pressing plate rotates around the vertical plate to be switched between a locking state and an unfolding state, the bending plate at the front end of the pressing plate presses the storage battery in the locking state, and the pressing plate drives the bending plate to be separated from the storage battery in the unfolding state, so that the limit of the storage battery is relieved; the holding assembly is arranged between the vertical plate and the pressing plate and used for holding the pressing plate in a current state, the holding assembly comprises a rotating plate and a limiting bolt, the front end of the rotating plate is hinged with the vertical plate, the rear end of the rotating plate is connected with the limiting bolt, a sliding groove is formed in the length direction of the pressing plate, the limiting bolt is movably arranged in the sliding groove, the limiting bolt is clamped into a first positioning part in a locking state, the sliding groove is provided with a first positioning part and a second positioning part in the length direction of the pressing plate, and the limiting bolt is clamped into the second positioning part in an unfolding state.
Preferably, the holding assembly further comprises a tension spring, one end of the tension spring is fixed with the vertical plate, the other end of the tension spring is fixed with the pressing plate, the tension spring is stretched in a locking state, and the pressing plate is held at the current position by the resilience force of the tension spring in an unfolding state.
Preferably, the first positioning portion and the second positioning portion are integrally located below other portions of the chute.
Preferably, the mounting plate is provided with a buffer block, the buffer block is arranged opposite to the bending plate, and the battery is clamped between the buffer block and the bending plate in a locked state.
Preferably, the buffer block is made of an elastically deformable material, and is pressed and compressed in a locked state.
Preferably, the front part of the pressing plate is provided with a notch, the bending plate comprises a transverse plate and a vertical plate fixed at the front end of the transverse plate, and the transverse plate is welded and fixed in the notch of the pressing plate; reinforcing ribs are arranged between the transverse plates and the vertical plates of the bending plate and connected with the pressing plate.
Preferably, the mounting plate comprises a bottom connecting plate and a side connecting plate which are perpendicular to each other, the side connecting plate is matched with the bending plate to clamp the storage battery, a waist-shaped hole is formed in the bottom connecting plate, and the mounting plate is fixed to the front frame at the waist-shaped hole.
Preferably, the upper part of the vertical plate extends to the rear side to form a pressure plate connecting part, and the side connecting plate is formed with a supporting part extending to the rear side, and the supporting part supports the pressure plate connecting part from the lower side.
Preferably, the vertical plates comprise a first vertical plate and a second vertical plate which are arranged side by side, the pressing plate is hinged between the first vertical plate and the second vertical plate through a pin shaft, and the pin shaft is connected with the first vertical plate through a coiled spring pin.
The invention also aims to provide a carrier, which comprises the battery locking structure of the carrier.
According to the invention, due to the adoption of the structure, the bending plate at the front end of the pressing plate is pressed against the storage battery or the pressing plate is pulled up to separate the bending plate from the storage battery, and the rotating plate drives the limit bolt to move to the first positioning part or the second positioning part along the sliding groove of the pressing plate simultaneously when the pressing plate is operated, so that the pressing plate is locked in a locking state or an unfolding state, the storage battery can be locked or unlocked by one action, the operation is simple, the storage battery is assembled and disassembled without other tools, the replacement speed of the storage battery is improved, and the working efficiency is improved. Meanwhile, the technological requirements of the structure are lower than those of the detachable side plates, and the manufacturing cost of the whole machine is reduced.
Drawings
FIG. 1 is a schematic diagram of the mounting position of a battery locking structure in a truck;
FIG. 2 is a schematic view of the battery locking mechanism in a locked state;
FIG. 3 is a schematic view of the battery locking mechanism in an extended state;
FIG. 4 is an exploded view of the battery locking mechanism;
FIG. 5 is a schematic view of the mounting plate and its upper riser and the mounting plate of the plug-in device;
FIG. 6 is a schematic view of the structure of the pressing plate and the bending plate;
fig. 7 is a schematic structural view of the rotating plate.
Reference numerals:
a front frame 01, a battery 02,
the pressing plate 1, the chute 11, the first positioning portion 111, the second positioning portion 112,
swivel plate 2, limit bolt 3, round pin axle 4, connecting piece 5, extension spring 6, bent plate 7, diaphragm 71, riser 72, buffer 9, mounting panel 10, first riser 11, second riser 12, plug mounting panel 13.
Detailed Description
Embodiments of the present invention are described in detail below.
Example 1:
the embodiment provides a storage battery locking structure of a carrier. As shown in fig. 2-4, the device comprises a mounting plate 10 fixed on a front frame 01, wherein a vertical plate is arranged on the mounting plate 10 and hinged with the front end of a pressing plate 1, a bending plate facing the mounting plate 10 is arranged at the front end of the pressing plate 1, and the bending plate is driven by the pressing plate 1 to move. The battery jar 02 is provided with a clamping part matched with the shape of the bending plate, and the bending plate can clamp the clamping part of the battery jar to lock the battery jar 02.
The rotation of the pressing plate 1 around the vertical plate is switched between a locking state and an unfolding state. As shown in fig. 2, in the locked state, the front end of the battery is abutted against the mounting plate 10, and the bending plate at the front end of the pressing plate 1 presses the battery from the rear side, so that the battery is not movable; as shown in fig. 3, in the unfolded state, the pressing plate 1 drives the bending plate to be separated from the storage battery to release the limit of the bending plate on the storage battery, and the storage battery is movable at the moment. Therefore, the locking or unlocking of the storage battery can be realized by changing the abutting state of the bending plate and the storage battery, and the structure is simple. And the pressure plate 1 drives the bending plate to change the position, so that the operation is convenient.
The holding assembly for keeping the pressing plate 1 in the current state is arranged between the vertical plate and the pressing plate 1, the holding assembly comprises a rotating plate 2 and a limiting bolt 3, the front end of the rotating plate 2 is hinged with the vertical plate, the rear end of the rotating plate 2 is connected with the limiting bolt 3, the pressing plate 1 is provided with a sliding groove 11 in the length direction of the pressing plate 1, the limiting bolt 3 is movably arranged in the sliding groove 11, the limiting bolt 3 is clamped into a first positioning part 111 in a locking state, the sliding groove 11 is provided with a first positioning part 111 and a second positioning part 112 in the length direction of the pressing plate 1, and the limiting bolt 3 is clamped into the second positioning part 112 in an unfolding state. In this embodiment, the first positioning portion 111 and the second positioning portion 112 are integrally located below other portions of the chute 11, so that the limit of the limit bolt 3 in the length direction of the platen 1 can be achieved by the first positioning portion 111 and the second positioning portion 112, and the position of the platen 1 can be locked. In the structure, as the front end of the rotating plate 2 is hinged with the vertical plate, the rear end of the rotating plate 2 is connected with the pressing plate 1 through the limiting bolt 3 at the chute 11 of the pressing plate 1, when the pressing plate 1 rotates, the front end of the rotating plate 2 can be driven to rotate around the hinge point of the rotating plate, and meanwhile, the rear end of the rotating plate 2 drives the limiting bolt 3 to move along the chute 11, so that the switching between the locking state and the unfolding state can be realized only by pressing the pressing plate 1 or lifting the pressing plate 1 downwards, and the state after the switching can be automatically locked, so that the operation is convenient.
In this embodiment, the front part of the pressing plate 1 is provided with a notch, the bending plate comprises a transverse plate 71 and a vertical plate 72 fixed at the front end of the transverse plate 71, and the transverse plate 71 is fixed in the notch of the pressing plate 1 by welding. This diaphragm 71 sets up along the length direction of riser 72 and connects riser 72 and clamp plate 1, and with the opening cooperation of clamp plate 1 front end with the board of bending and clamp plate 1 even as an organic wholely, can strengthen the intensity of riser 72, play the effect of strengthening rib.
As a preferred embodiment, the holding assembly further comprises a tension spring 6, one end of the tension spring 6 is fixed with the vertical plate, the other end of the tension spring 6 is fixed with the pressing plate 1, the tension spring 6 is stretched in a locked state, and the resilience of the tension spring 6 holds the pressing plate 1 in a current position in an unfolded state. As shown in fig. 1, the battery locking structure is arranged near the battery box cover plate, after the cover plate is opened, if the current battery locking structure is in an unfolding state, the cover plate can not be covered under the action of external force because the cover plate 1 is kept at an upturned position by the action of the tension spring 6, so that the cover plate can be covered under the condition that the battery locking device is in a locking state, the vehicle can run by the vehicle, and the use safety of the vehicle is ensured.
As shown in fig. 5, the mounting plate 10 in this embodiment includes a bottom connecting plate and a side connecting plate that are perpendicular to each other, the side connecting plate and the bending plate cooperate to clamp the battery, a kidney-shaped hole is formed in the bottom connecting plate, and the mounting plate 10 is fixed on the front frame 01 at the kidney-shaped hole. The connection part of the mounting plate 10 and the front frame 01 is provided with a waist-shaped hole, and the front and rear mounting positions of the mounting plate 10 can be adjusted according to actual needs. Preferably, the side of the mounting plate 10 facing the bending plate is provided with a buffer block 9, said buffer block 9 being arranged opposite the bending plate, in this embodiment said buffer block 9 being arranged on the lateral connection plate. The storage battery is clamped between the buffer block 9 and the bending plate in the locking state, so that the mounted storage battery can be buffered. The buffer block 9 is made of elastic deformable materials, and in a locking state, the buffer block 9 is extruded and compressed, so that the storage battery can be effectively compressed to prevent the storage battery from loosening in the running process of a vehicle. In an embodiment, the buffer block 9 may be made of PU.
The upper part of the vertical plate extends to the rear side to form a connecting part of the pressing plate 1, a supporting part extending to the rear side is formed on the lateral connecting plate, and the supporting part supports the connecting part of the pressing plate 1 from the lower part. Because the upper part of the vertical plate extends backwards to form the connecting part of the pressing plate 1, the thin neck part is formed on the vertical plate, and the supporting part can ensure the strength of the vertical plate and prevent the vertical plate from being broken at the neck part in the subsequent use. In an embodiment, the vertical plates may include a first vertical plate 11 and a second vertical plate 12 arranged side by side, the pressing plate 1 is hinged between the first vertical plate 11 and the second vertical plate 12 through a pin 4, and the pin 4 is connected with the first vertical plate 11 through a coiled spring pin. The pin shaft 4 penetrates through the first vertical plate 11 and the second vertical plate 12, and the pin shaft 4 is supported through the vertical plates at two sides, so that the pressing plate 1 can be ensured to keep stable in the rotation process of the opposite plates when being lifted up and pressed down. And, set up rolling spring pin connecting pin 4 and riser, can the round pin axle 4 break away from the riser, strengthen the connection reliability of storage battery locking structure.
Referring to fig. 6 and 7, in this embodiment, the pin 4 penetrates through the hole a5 of the first vertical plate 11, the hole b1 of the pressing plate 1, and the hole a2 of the second vertical plate 12, so as to achieve connection of the three, and then the pin 4 is connected with the hole a4 of the first vertical plate 11 through a rolled spring pin. The hole d2 at the front end of the rotating plate 2 corresponds to the hole a1 on the second vertical plate 12, the hole d1 at the rear end of the rotating plate 2 is connected with the limit bolt 3 in a matched mode to be connected into the chute 11 of the pressing plate 1 through the connecting piece 5, and the limit bolt 3 can slide along the chute 11. One end of the tension spring 6 is hooked at the hole a3 of the first vertical plate 11, and the other end is hooked at the hole b2 of the pressing plate 1, so that the elastic state of the compression spring can be changed along with lifting and pressing down of the pressing plate 1, the tension spring 6 is stretched in a locking state, and the tension spring 6 is contracted in the locking state.
Therefore, the locking structure of the carrier has the following advantages:
the device is simple in principle and convenient to operate, and the battery is assembled and disassembled without other tools, so that the replacement speed of the battery is improved, and the working efficiency is improved.
The economical efficiency, the technological requirement of the device is lower than that of the detachable side plate, and the manufacturing cost of the whole machine is reduced.
The reliability, buffer block 9 has certain elasticity, can effectively compress tightly the storage battery and take off.
The safety, under the storage battery locking device was in the locking state, the storage battery lid just can be covered, and the vehicle side can travel.
Example 2:
this embodiment provides a truck to which the battery locking structure described in embodiment 1 is applied.
While embodiments of the present invention have been shown and described, it will be understood by those of ordinary skill in the art that: many changes, modifications, substitutions and variations may be made to the embodiments without departing from the spirit and principles of the invention, the scope of which is defined by the claims and their equivalents.
Claims (10)
1. The battery locking structure of the carrier is characterized by comprising a mounting plate fixed on a front frame, wherein a vertical plate is arranged on the mounting plate and is hinged with the front end of a pressing plate, and the front end of the pressing plate is provided with a bending plate facing the mounting plate; the pressing plate rotates around the vertical plate to be switched between a locking state and an unfolding state, the bending plate at the front end of the pressing plate presses the storage battery in the locking state, and the pressing plate drives the bending plate to be separated from the storage battery in the unfolding state, so that the limit of the storage battery is relieved; the holding assembly is arranged between the vertical plate and the pressing plate and used for holding the pressing plate in a current state, the holding assembly comprises a rotating plate and a limiting bolt, the front end of the rotating plate is hinged with the vertical plate, the rear end of the rotating plate is connected with the limiting bolt, a sliding groove is formed in the length direction of the pressing plate, the limiting bolt is movably arranged in the sliding groove, the limiting bolt is clamped into a first positioning part in a locking state, the sliding groove is provided with a first positioning part and a second positioning part in the length direction of the pressing plate, and the limiting bolt is clamped into the second positioning part in an unfolding state.
2. The battery locking structure of a carrier according to claim 1, wherein the holding assembly further comprises a tension spring, one end of the tension spring is fixed to the vertical plate, the other end of the tension spring is fixed to the pressing plate, the tension spring is stretched in the locked state, and the pressing plate is held at the current position by the resilience force of the tension spring in the extended state.
3. The battery locking structure of a carrier according to claim 1, wherein the first positioning portion and the second positioning portion are integrally located below other portions of the chute.
4. The battery locking structure of a carrier according to claim 1, wherein the mounting plate is provided with a buffer block, the buffer block is disposed opposite to the bending plate, and the battery is clamped between the buffer block and the bending plate in the locked state.
5. The battery locking structure of claim 4, wherein the buffer block is made of an elastically deformable material, and in a locked state, the buffer block is pressed and compressed.
6. The battery locking structure of a carrier according to claim 1, wherein the front portion of the pressing plate is provided with a notch, the bending plate comprises a transverse plate and a vertical plate fixed at the front end of the transverse plate, and the transverse plate is fixed in the notch of the pressing plate by welding.
7. The battery locking structure of a carrier according to claim 1, wherein the mounting plate comprises a bottom connecting plate and a side connecting plate which are perpendicular to each other, the side connecting plate is matched with the bending plate to clamp the battery, a waist-shaped hole is formed in the bottom connecting plate, and the mounting plate is fixed on the front frame at the waist-shaped hole.
8. The battery locking structure of a carrier according to claim 7, wherein the upper portion of the vertical plate extends to the rear side to form a pressure plate connecting portion, and the side connecting plate is formed with a support portion extending to the rear side, and the support portion supports the pressure plate connecting portion from below.
9. The battery locking structure of a carrier according to claim 1, wherein the vertical plates comprise a first vertical plate and a second vertical plate which are arranged side by side, the pressing plate is hinged between the first vertical plate and the second vertical plate through a pin shaft, and the pin shaft is connected with the first vertical plate through a rolling spring pin.
10. A carrier comprising the battery locking structure of the carrier according to any one of claims 1 to 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310750259.7A CN116750693A (en) | 2023-06-25 | 2023-06-25 | Carrier and storage battery locking device thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310750259.7A CN116750693A (en) | 2023-06-25 | 2023-06-25 | Carrier and storage battery locking device thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN116750693A true CN116750693A (en) | 2023-09-15 |
Family
ID=87947586
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202310750259.7A Pending CN116750693A (en) | 2023-06-25 | 2023-06-25 | Carrier and storage battery locking device thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN116750693A (en) |
-
2023
- 2023-06-25 CN CN202310750259.7A patent/CN116750693A/en active Pending
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