CN118238757A - Impact-resistant engine compartment cover position safety protection mechanism and working method thereof - Google Patents
Impact-resistant engine compartment cover position safety protection mechanism and working method thereof Download PDFInfo
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- CN118238757A CN118238757A CN202410444414.7A CN202410444414A CN118238757A CN 118238757 A CN118238757 A CN 118238757A CN 202410444414 A CN202410444414 A CN 202410444414A CN 118238757 A CN118238757 A CN 118238757A
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- 229910001240 Maraging steel Inorganic materials 0.000 claims description 29
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Abstract
The invention relates to an impact-resistant engine compartment cover position safety protection mechanism and a working method thereof, wherein the protection mechanism is composed of a reaction mechanism, a limiting seat and a connecting arm, an impact sensor in an air inlet grille in front of a vehicle is controlled to send an electric signal to a relay, the relay controls a circuit from a storage battery to an electric stay bar to be connected, the electric stay bar works, a piston rod stretches to a limit position to control a side cover support moving arm in the engine compartment cover to move around a side cover support moving arm in the engine compartment cover, the side cover support moving arm in the engine compartment cover stirs an upper cantilever to rotate, and an upper point of the upper cantilever is rebounded to a position parallel to the vertical direction of a lower support arm under the action of a spring after being separated from the side cover support moving arm in the engine compartment cover; the vehicle collision stop device has the advantages that the stop function in the advancing direction is achieved when the superposition position of the vehicle collision is just at the movement limit position of the side cover support moving arm in the engine compartment cover, and the problems that the tail height of a front vehicle further threatens the life safety of a primary driver and a secondary driver and the like are avoided.
Description
Technical Field
The invention belongs to the technical field of body-in-white opening and closing parts, and particularly relates to a safety protection mechanism for an impact-resistant engine hatch cover and a working method thereof.
Background
When the vehicle runs on the expressway and rear-end collision occurs, if the vehicle contacts with a vehicle with a higher chassis such as a large truck, the vehicle head position easily drills into the vehicle bottom, and the bumper does not play a key role. At this time, the gradient of the front engine compartment cover of the vehicle and the deformation force caused by collision are absorbed by the A column, no protective measures exist from the front bumper to a part of the edge position below the windshield glass, the tail impact of the front vehicle can be resisted, and the position of the primary driver and the secondary driver becomes a high-risk position, so that the life safety of passengers is seriously influenced.
In view of this, there is a strong need to develop a safety protection mechanism capable of blocking the impact of the rear part of a vehicle in front when the vehicle collides, so as to effectively solve the above-mentioned problems.
Disclosure of Invention
The invention aims to provide an anti-impact engine compartment cover position safety protection mechanism and a working method thereof, which are used for solving the problem that the tail height of a front vehicle further threatens the life safety of a primary driver and a secondary driver.
The invention aims at realizing the following technical scheme:
The anti-impact engine cabin cover position safety protection mechanism consists of two groups of reaction mechanisms, two groups of limiting seats and a connecting arm;
Each group of reaction mechanism is composed of an engine compartment cover inner side cover, an engine compartment cover inner side cover support shaft, an engine compartment cover inner side cover support moving arm shaft, an electric stay rod support shaft, an impact sensor and a relay respectively, and is used for reacting when a vehicle collides, so that impact injury to a primary driver and a secondary driver due to the difference of front and rear vehicle heights after the collision is avoided;
The engine compartment cover inner side cover is arranged on the engine compartment cover inner side cover bracket; the side cover bracket shaft in the engine compartment cover is arranged between the two connecting arms; the engine compartment cover inner side cover support moving arm is connected with the engine compartment cover inner side cover support moving arm shaft; the inner side cover support moving arm shaft of the engine compartment cover is arranged at the top end of a piston rod of the electric stay bar; the bottom end of the electric stay bar is connected with the electric stay bar bracket; the electric support rod bracket is connected with the bottom end of the electric support rod and penetrates through the electric support rod bracket shaft; the electric stay bar support shaft is arranged between the two connecting arms; the impact sensor is arranged on the inner side of the front air inlet grille of the vehicle; the relay is connected with the built-in battery of the lower supporting arm and the electric supporting rod;
The limiting seat consists of an upper rotating arm, an upper rotating arm shaft, three springs and a lower supporting arm with a built-in battery, and is used for providing support and limiting functions for a support arm of an inner side cover of an engine compartment cover of the reaction mechanism when a vehicle collides; the upper rotating arm is fixed on the upper rotating arm shaft and is connected with the spring; the upper rotating arm shaft is fixedly arranged on the lower supporting arm; the spring is used for providing pulling force in the horizontal direction for the upper radial arm to enable the upper radial arm to return to the vertical position, and is connected between the bottom of the upper radial arm and the top of the lower support arm.
Further, the inner side cover of the engine compartment cover is made of the same material as the white car body and is used for decoration and connection of the outer side cover of the engine compartment cover.
Further, the engine compartment cover inner side cover bracket is used for fixing and bearing an engine compartment cover inner side cover and is formed by forging and processing 18Ni maraging steel series steel materials; the engine compartment cover inner side cover support shaft is used for guiding rotation of the engine compartment cover inner side cover support.
Further, the moving arm of the inner side cover support of the engine compartment cover and the moving arm of the inner side cover support of the engine compartment cover are formed by forging and processing 18Ni maraging steel series steel materials and are respectively used for bearing the impact force of vehicle collision and the rotation guiding of the moving arm of the inner side cover support of the engine compartment cover.
Further, the electric stay bar can be realized by a LA36 type linear push rod, the highest thrust is 6,800N, the speed is 168mm/s, and the electric stay bar is used for rapidly supporting a side cover support moving arm in an engine compartment cover when a vehicle collides, so that the electric stay bar plays a role in movement and support.
Further, the electric support rod bracket and the electric support rod bracket shaft are formed by forging 18Ni maraging steel series steel materials; the electric stay bar support shaft is used for guiding the electric stay bar support to rotate around the shaft.
Further, the impact sensor adopts a front impact sensor and is used for sensing vehicle impact and sending a signal to the relay; the relay is used for receiving the electric signal of the impact sensor and controlling the electric stay bar to work.
Further, the upper rotating arm shaft and the lower supporting arm are all formed by forging and processing 18Ni maraging steel series steel, and are respectively used for providing supporting and limiting functions when the inner side cover support arm of the engine compartment cover is reset to be in a vertical position after rotating, providing pivoting guiding for the upper rotating arm, and bearing and fixing the upper rotating arm, the upper rotating arm shaft and the spring.
Furthermore, the connecting arm can be formed by forging and processing 18Ni maraging steel series steel and is used for fixing a side cover support shaft and an electric support rod support shaft in an engine compartment cover.
A working method of an anti-impact engine compartment cover position safety protection mechanism comprises the following steps:
A. When the vehicle collides, an impact sensor in the front air inlet grille of the vehicle sends an electric signal to the relay;
B. the relay controls the circuit from the storage battery to the electric stay bar to be connected, the electric stay bar works, and the piston rod stretches to the limit position to control the moving arm of the side cover support in the engine compartment cover to move around the moving arm shaft of the side cover support in the engine compartment cover;
C. the upper rotating arm is driven to rotate by the side cover support moving arm in the engine compartment cover, and the upper point of the upper rotating arm is rebounded to a position parallel to the vertical direction of the lower supporting arm under the action of a spring after being separated from the side cover support moving arm in the engine compartment cover;
D. the vehicle collision stop device has the advantages that the stop function in the advancing direction is realized when the coincident position of the vehicle collision is just at the movement limit position of the side cover support moving arm in the engine compartment cover, and the further threat of the life safety of the primary and secondary drivers on the tail height of the front vehicle is avoided.
Compared with the prior art, the invention has the beneficial effects that:
According to the invention, an impact sensor in the front air inlet grille of a vehicle is controlled to send an electric signal to a relay, the relay controls a circuit from a storage battery to an electric stay bar to be connected, the electric stay bar works, a piston rod stretches to a limit position to control a side cover support moving arm in an engine compartment cover to move around a side cover support moving arm in the engine compartment cover, at the moment, the side cover support moving arm in the engine compartment cover toggles an upper cantilever to rotate, and an upper point of the upper cantilever is rebounded to a position parallel to the vertical direction of a lower support arm under the action of a spring after being separated from the side cover support moving arm in the engine compartment cover; the vehicle collision control device has the advantages that the blocking effect in the advancing direction is achieved when the superposition position of the vehicle collision is just at the movement limit position of the side cover support moving arm in the engine compartment cover, the problem that the tail height of a front vehicle further threatens the life safety of a main driver and a secondary driver is avoided, and the field of opening and closing parts of white vehicle bodies is expanded.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings that are needed in the embodiments will be briefly described below, it being understood that the following drawings only illustrate some embodiments of the present invention and therefore should not be considered as limiting the scope, and other related drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a schematic diagram of the overall structure of an impact resistant engine hatch position safety protection mechanism;
FIG. 2 is a schematic diagram of the main structure of the reaction mechanism;
FIG. 3 is a left side view of FIG. 2;
fig. 4 is a schematic operation of the impact resistant engine compartment cover position safety protection mechanism.
Detailed Description
The invention is further illustrated by the following examples:
The invention relates to a safety protection mechanism for an impact-resistant engine compartment cover position, which consists of a reaction mechanism, a limiting seat and a connecting arm.
The reaction mechanism is divided into two groups, and each group is composed of an engine compartment cover inner side cover, an engine compartment cover inner side cover support shaft, an engine compartment cover inner side cover support moving arm shaft, an electric supporting rod support shaft, an impact sensor and a relay.
The reaction mechanism is used for reacting when the vehicle collides, so that impact injury to the primary and secondary drivers due to the height difference of the front and rear vehicles after the collision is avoided.
The inner side cover of the engine compartment cover is made of the same material as the white automobile body, is arranged on the inner side cover bracket of the engine compartment cover and is used for decoration and connection of the outer side cover of the engine compartment cover.
The engine compartment cover inner side cover bracket is used for fixing and bearing the engine compartment cover inner side cover. The side cover bracket in the engine compartment cover can be formed by forging 18Ni maraging steel series steel materials: 2100MPa and fracture toughness 66 MPa.m1/2.
The engine compartment cover inner side cover support shaft is arranged between the two connecting arms and used for guiding rotation of the engine compartment cover inner side cover support.
The moving arm of the inner side cover support of the engine compartment cover can be formed by forging and processing 18Ni maraging steel series steel materials, is connected with the moving arm of the inner side cover support of the engine compartment cover and is used for bearing the impact force of a vehicle during collision.
The moving arm shaft of the inner cover support of the engine compartment cover can be formed by forging and processing 18Ni maraging steel series steel materials, and is arranged at the top end of a piston rod of the electric supporting rod and used for guiding the rotating of the moving arm of the inner cover support of the engine compartment cover.
The electric stay bar can be realized by a LA36 type linear push rod, and the highest thrust is 6,800N and the speed is 168mm/s. The bottom of the electric stay bar is connected with the electric stay bar support, and is used for rapidly supporting the side cover support moving arm in the engine compartment cover to play a role in movement and support when a vehicle collides.
The electric support rod bracket can be formed by forging and processing 18Ni maraging steel series steel materials, is connected with the bottom end of the electric support rod and penetrates through an electric support rod bracket shaft.
The electric support rod support shaft can be formed by forging and processing 18Ni maraging steel series steel, and is arranged between the two connecting arms and used for guiding the electric support rod support to rotate around the shaft.
The impact sensor can be realized by a Zhuo Li signal front impact sensor, is arranged on the inner side of the front air inlet grille of the vehicle and is used for sensing the vehicle impact and sending a signal to the relay.
The relay is connected with the built-in battery of the lower supporting arm and the electric supporting rod and is used for receiving the electric signal of the impact sensor and controlling the electric supporting rod to work.
The limiting seat consists of an upper rotating arm, an upper rotating arm shaft, a spring and a lower supporting arm. And a battery is arranged in the lower supporting arm.
The limiting seats are divided into two groups, and are used for providing support and limiting functions for the support arms of the inner side cover of the engine compartment cover of the reaction mechanism when the vehicle collides.
The upper rotating arm can be formed by forging and processing 18Ni maraging steel series steel, is fixed on the upper rotating arm shaft and is connected with a spring, and the upper rotating arm is used for providing supporting and limiting functions when the inner side cover support arm of the engine compartment cover is reset to be in a vertical position after rotating the inner side cover support arm.
The upper rotating arm shaft can be formed by forging and processing 18Ni maraging steel series steel, and is fixedly arranged on the lower supporting arm and used for providing rotating guide for the upper rotating arm around the shaft.
The spring is used for providing pulling force in the horizontal direction for the upward radial arm to restore the upward radial arm to the vertical position. The total of three springs are connected between the bottom of the upper rotating arm and the top of the lower supporting arm.
The lower support arm is internally provided with a battery, can be formed by forging and processing 18Ni maraging steel series steel, and is used for bearing and fixing mechanism parts such as an upper rotating arm, an upper rotating arm shaft, a spring and the like. The built-in battery can be realized by adopting a 12V storage battery and is used for supplying power to the electric stay bars after the vehicle collides, so that the normal operation of the mechanism is ensured. Since it is uncertain whether the vehicle-mounted battery can normally operate after the vehicle collides. Therefore, the power supply is here powered by a built-in battery instead of an on-board battery.
The connecting arm can be formed by forging and processing 18Ni maraging steel series steel and is used for fixing a side cover support shaft and an electric support rod support shaft in an engine compartment cover.
The anti-impact engine compartment cover position safety protection mechanism can be used for all passenger vehicles and can be used for safety protection of all passenger vehicles in a high-speed rear-end collision truck.
The working method comprises the following steps:
When a vehicle collides, an impact sensor in an air inlet grille in front of the vehicle sends an electric signal to a relay, the relay controls a circuit from a storage battery to an electric stay bar to be connected, the electric stay bar works, a piston rod stretches to a limit position to control a side cover support moving arm in an engine compartment cover to move around an engine compartment cover inner side cover support moving arm shaft, at the moment, the engine compartment cover inner side cover support moving arm stirs an upper cantilever to rotate, and an upper point of the upper cantilever is bounced to a position parallel to the vertical direction of a lower support arm under the action of a spring after separation and release of the upper point of the upper cantilever from the engine compartment cover inner side cover support moving arm. The vehicle collision stop device has the advantages that the stop function in the advancing direction is realized when the coincident position of the vehicle collision is just at the movement limit position of the side cover support moving arm in the engine compartment cover, and the further threat of the life safety of the primary and secondary drivers on the tail height of the front vehicle is avoided.
Example 1
1-3, The anti-impact engine hatch cover position safety protection mechanism consists of two groups of reaction mechanisms, two groups of limiting seats and a connecting arm.
Each group of reaction mechanism comprises an engine compartment cover inner side cover, an engine compartment cover inner side cover support shaft, an engine compartment cover inner side cover support moving arm shaft, an electric stay rod support shaft, an impact sensor and a relay. Each group of limiting seats consists of an upper rotating arm, an upper rotating arm shaft, a spring and a lower supporting arm with a built-in battery.
The inner side cover of the engine compartment cover is made of the same material as the white automobile body and is arranged on the inner side cover bracket of the engine compartment cover. The engine compartment cover inner side cover support is formed by forging 18Ni maraging steel series steel materials: 2100MPa and fracture toughness 66 MPa.m1/2. The side cover support shaft in the engine compartment cover is formed by forging and processing 18Ni maraging steel series steel and is arranged between two connecting arms. The moving arm of the side cover support in the engine compartment cover is formed by forging and processing 18Ni maraging steel series steel materials and is connected with the moving arm shaft of the side cover support in the engine compartment cover. The moving arm shaft of the inner side cover support of the engine compartment cover is formed by forging and processing 18Ni maraging steel series steel and is arranged at the top end of the piston rod of the electric stay bar. The electric stay bar is realized by adopting an LA36 type linear push rod, and the highest thrust 6,800N and the speed 168mm/s of the push rod are connected with the electric stay bar bracket. The electric support rod bracket is formed by forging and processing 18Ni maraging steel series steel materials and is connected with the electric support rod and the electric support rod bracket through shafts. The electric stay bar support shaft is formed by forging and processing 18Ni maraging steel series steel materials and is arranged between two connecting arms. The impact sensor can be realized by a Zhuo Li front impact sensor and is arranged on the inner side of the front air inlet grille of the vehicle. The relay is connected with the built-in battery and the electric stay bar.
The upper rotating arm is formed by forging and processing 18Ni maraging steel series steel, and is fixed on the upper rotating arm shaft and connected with the spring. The upper rotating arm shaft is formed by forging and processing 18Ni maraging steel series steel, and is fixedly arranged on the lower supporting arm. The springs are connected between the bottom of the upper rotating arm and the top of the lower supporting arm. The lower supporting arm is formed by forging and processing 18Ni maraging steel series steel, the battery is realized by a 12V storage battery and is used for bearing and fixing mechanism parts such as an upper rotating arm, an upper rotating arm shaft, a spring and the like, and the built-in battery is used for supplying power to the electric supporting rod after a vehicle collides, so that the normal operation of the mechanism is ensured.
The connecting arm is formed by forging and processing 18Ni maraging steel series steel.
Example 2
The working method of the anti-impact engine compartment cover position safety protection mechanism is as shown in fig. 4, and comprises the following steps:
1. when the vehicle collides, an impact sensor in the front air inlet grille of the vehicle sends an electric signal to the relay;
2. the relay controls the circuit from the storage battery to the electric stay bar to be connected, the electric stay bar works, and the piston rod stretches to the limit position to control the moving arm of the side cover support in the engine compartment cover to move around the moving arm shaft of the side cover support in the engine compartment cover;
3. the upper rotating arm is driven to rotate by the side cover support moving arm in the engine compartment cover, and the upper point of the upper rotating arm is rebounded to a position parallel to the vertical direction of the lower supporting arm under the action of a spring after being separated from the side cover support moving arm in the engine compartment cover;
4. The vehicle collision stop device has the advantages that the stop function in the advancing direction is realized when the coincident position of the vehicle collision is just at the movement limit position of the side cover support moving arm in the engine compartment cover, and the further threat of the life safety of the primary and secondary drivers on the tail height of the front vehicle is avoided.
Note that the above is only a preferred embodiment of the present invention and the technical principle applied. It will be understood by those skilled in the art that the present invention is not limited to the particular embodiments described herein, but is capable of various obvious changes, rearrangements and substitutions as will now become apparent to those skilled in the art without departing from the scope of the invention. Therefore, while the invention has been described in connection with the above embodiments, the invention is not limited to the embodiments, but may be embodied in many other equivalent forms without departing from the spirit or scope of the invention, which is set forth in the following claims.
Claims (10)
1. An impact-resistant engine compartment cover position safety protection mechanism is characterized in that: consists of two groups of reaction mechanisms, two groups of limiting seats and connecting arms;
Each group of reaction mechanism is composed of an engine compartment cover inner side cover, an engine compartment cover inner side cover support shaft, an engine compartment cover inner side cover support moving arm shaft, an electric stay rod support shaft, an impact sensor and a relay respectively, and is used for reacting when a vehicle collides, so that impact injury to a primary driver and a secondary driver due to the difference of front and rear vehicle heights after the collision is avoided;
The engine compartment cover inner side cover is arranged on the engine compartment cover inner side cover bracket; the side cover bracket shaft in the engine compartment cover is arranged between the two connecting arms; the engine compartment cover inner side cover support moving arm is connected with the engine compartment cover inner side cover support moving arm shaft; the inner side cover support moving arm shaft of the engine compartment cover is arranged at the top end of a piston rod of the electric stay bar; the bottom end of the electric stay bar is connected with the electric stay bar bracket; the electric support rod bracket is connected with the bottom end of the electric support rod and penetrates through the electric support rod bracket shaft; the electric stay bar support shaft is arranged between the two connecting arms; the impact sensor is arranged on the inner side of the front air inlet grille of the vehicle; the relay is connected with the built-in battery of the lower supporting arm and the electric supporting rod;
The limiting seat consists of an upper rotating arm, an upper rotating arm shaft, three springs and a lower supporting arm with a built-in battery, and is used for providing support and limiting functions for a support arm of an inner side cover of an engine compartment cover of the reaction mechanism when a vehicle collides; the upper rotating arm is fixed on the upper rotating arm shaft and is connected with the spring; the upper rotating arm shaft is fixedly arranged on the lower supporting arm; the spring is used for providing pulling force in the horizontal direction for the upper radial arm to enable the upper radial arm to return to the vertical position, and is connected between the bottom of the upper radial arm and the top of the lower support arm.
2. The impact resistant engine compartment cover position safety protection mechanism of claim 1, wherein: the inner side cover of the engine compartment cover is the same as the white car body in material and is used for decoration and connection of the outer side cover of the engine compartment cover.
3. The impact resistant engine compartment cover position safety protection mechanism of claim 1, wherein: the engine compartment cover inner side cover bracket is used for fixing and bearing the engine compartment cover inner side cover and is formed by forging 18Ni maraging steel series steel; the engine compartment cover inner side cover support shaft is used for guiding rotation of the engine compartment cover inner side cover support.
4. The impact resistant engine compartment cover position safety protection mechanism of claim 1, wherein: the moving arm of the inner side cover support of the engine compartment cover and the moving arm of the inner side cover support of the engine compartment cover are formed by forging and processing 18Ni maraging steel series steel materials and are respectively used for bearing impact force during vehicle collision and guiding rotation of the moving arm of the inner side cover support of the engine compartment cover.
5. The impact resistant engine compartment cover position safety protection mechanism of claim 1, wherein: the electric stay bar can be realized by a LA36 type linear push rod, the highest thrust is 6,800N, the speed is 168mm/s, and the electric stay bar is used for quickly supporting a side cover support moving arm in an engine compartment cover to play a role in movement and support when a vehicle collides.
6. The impact resistant engine compartment cover position safety protection mechanism of claim 1, wherein: the electric support rod bracket and the electric support rod bracket shaft are formed by forging and processing 18Ni maraging steel series steels; the electric stay bar support shaft is used for guiding the electric stay bar support to rotate around the shaft.
7. The impact resistant engine compartment cover position safety protection mechanism of claim 1, wherein: the impact sensor adopts a front impact sensor and is used for sensing vehicle impact and sending a signal to the relay; the relay is used for receiving the electric signal of the impact sensor and controlling the electric stay bar to work.
8. The impact resistant engine compartment cover position safety protection mechanism of claim 1, wherein: the upper rotating arm, the upper rotating arm shaft and the lower supporting arm are all formed by forging and processing 18Ni maraging steel series steel, and are respectively used for providing supporting and limiting functions when the inner side cover support arm of the engine compartment cover is reset to be in a vertical position after rotating, and providing pivoting guiding for the upper rotating arm, bearing and fixing the upper rotating arm, the upper rotating arm shaft and the spring.
9. The impact resistant engine compartment cover position safety protection mechanism of claim 1, wherein: the connecting arm can be formed by forging and processing 18Ni maraging steel series steel and is used for fixing a side cover support shaft and an electric support rod support shaft in an engine compartment cover.
10. The working method of the anti-impact engine compartment cover position safety protection mechanism is characterized by comprising the following steps of:
A. When the vehicle collides, an impact sensor in the front air inlet grille of the vehicle sends an electric signal to the relay;
B. the relay controls the circuit from the storage battery to the electric stay bar to be connected, the electric stay bar works, and the piston rod stretches to the limit position to control the moving arm of the side cover support in the engine compartment cover to move around the moving arm shaft of the side cover support in the engine compartment cover;
C. the upper rotating arm is driven to rotate by the side cover support moving arm in the engine compartment cover, and the upper point of the upper rotating arm is rebounded to a position parallel to the vertical direction of the lower supporting arm under the action of a spring after being separated from the side cover support moving arm in the engine compartment cover;
D. the vehicle collision stop device has the advantages that the stop function in the advancing direction is realized when the coincident position of the vehicle collision is just at the movement limit position of the side cover support moving arm in the engine compartment cover, and the further threat of the life safety of the primary and secondary drivers on the tail height of the front vehicle is avoided.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202410444414.7A CN118238757A (en) | 2024-04-15 | 2024-04-15 | Impact-resistant engine compartment cover position safety protection mechanism and working method thereof |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202410444414.7A CN118238757A (en) | 2024-04-15 | 2024-04-15 | Impact-resistant engine compartment cover position safety protection mechanism and working method thereof |
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| Publication Number | Publication Date |
|---|---|
| CN118238757A true CN118238757A (en) | 2024-06-25 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202410444414.7A Pending CN118238757A (en) | 2024-04-15 | 2024-04-15 | Impact-resistant engine compartment cover position safety protection mechanism and working method thereof |
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| Country | Link |
|---|---|
| CN (1) | CN118238757A (en) |
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2024
- 2024-04-15 CN CN202410444414.7A patent/CN118238757A/en active Pending
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