An electric vehicle power supply lock
By incorporating springs and limiting structures into the electric vehicle power lock, the problem of poor contact caused by vibration is solved, ensuring stable power supply and safety for the electric vehicle, and achieving reliable circuit connection and smooth operation.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Filing Date
- 2025-09-24
- Publication Date
- 2026-07-14
AI Technical Summary
Existing electric vehicle power locks are prone to poor contact or power failure under vibration conditions, which can cause the motor to suddenly lose power and pose a safety hazard.
An electric vehicle power lock was designed. By setting a No. 1 spring on one side of the contact point to continuously apply elastic thrust, the contact point and the contact ring are kept in close contact. A No. 2 spring and a metal ball are used to form a stable positioning slot structure with a limiting protrusion to prevent the lock pin from rotating due to vibration. Combined with the transmission connection method of the plug block, slot and plug shaft, the torque is stably transmitted.
It effectively prevents contacts from loosening or breaking due to vibration, ensuring the stability of the circuit connection and the continuity and safety of the electric vehicle's power supply, and improving the smoothness of operation and the consistency of response.
Smart Images
Figure CN224491302U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to the technical field of power lock, concretely relates to an electric vehicle power lock. BACKGROUND
[0002] As the core component of the electric vehicle power on and power off, the performance stability of the electric door lock directly affects the normal use of the electric vehicle, and is the key link to ensure the electric safety of the electric vehicle. The structure of the existing electric door lock is relatively fixed, mainly composed of a lock shell, a lock core assembly arranged in the lock shell and an electric appliance box assembly at the tail. The vehicle user inserts a matching key, and the mechanical transmission of the lock core assembly drives the contact switching inside the electric appliance box assembly, finally realizing the power on or power off operation of the vehicle.
[0003] However, the existing electric door lock generally relies on the mechanical limiting structure of the lock core itself to maintain the power on state. Some products use cam or slot structure at the tail of the lock core to cooperate with the transmission rod to form a "in-place self-locking" mechanism. However, this design lacks effective anti-vibration capability. When the vehicle is driving on a bumpy road, continuous mechanical impact and high-frequency vibration will cause slight displacement of the lock core or transmission components, and then cause instantaneous disconnection between the moving contact and the static contact, resulting in "virtual connection" or "broken contact" phenomenon. This poor contact not only causes the instrument panel to flicker and the controller to restart, but in severe cases, it may even cause the motor to suddenly lose power, causing the rider to lose power control, which is prone to cause traffic accidents. SUMMARY
[0004] The utility model aims at providing an electric vehicle power lock to solve the problem of poor contact and easy mispower-off of the power lock in the prior art due to vibration.
[0005] In order to achieve the above-mentioned purpose, the utility model provides the following technical scheme: an electric vehicle power lock, comprising:
[0006] The base is fixedly installed with a main cylinder at the top end, and the main cylinder is fixedly installed with a secondary cylinder at one end. A lock core is arranged in the secondary cylinder, and a transmission shaft is movably installed in the secondary cylinder. The lock core is in transmission connection with the transmission shaft. A lock column is movably installed in the main cylinder, and the transmission shaft is in transmission connection with the lock column. A contact piece is movably installed on one side of the lock column, and a contact point is arranged outside the contact piece. A first spring is connected to one side of the contact point. An encapsulation shell is clamped in the main cylinder, and two contact rings are arranged on one side of the encapsulation shell. Signal lines are connected to one side of the two contact rings. The contact point and the contact ring are in abutment. Two metal balls are movably installed outside the lock column, and a second spring is arranged on one side of the two metal balls. A limiting protrusion is arranged in the main cylinder, and the metal balls are clamped on one side of the limiting protrusion.
[0007] Furthermore, a plug is fixedly installed at one end of the lock cylinder near the drive shaft, and a slot is opened on the side of the drive shaft near the lock cylinder. The plug is inserted into the slot and slides against the inner wall of the slot. A plug shaft is fixedly installed at one end of the drive shaft near the lock pin, and a plug hole is opened at one end of the lock pin near the drive shaft. The plug shaft is inserted into the plug hole and slides against the inner wall of the plug hole.
[0008] Furthermore, a T-shaped block is fixedly installed at the end of the locking pin away from the insertion hole, and a T-shaped groove is provided on the contact piece, with the T-shaped groove sleeved on the outside of the T-shaped block.
[0009] Furthermore, the locking pin has several through holes on the side near the contact plate, and the first spring is inserted into the through holes.
[0010] Furthermore, the encapsulation shell is disposed inside the main cylinder near the contact plate, and the signal line is disposed on the side of the encapsulation shell away from the contact ring.
[0011] Furthermore, two limiting holes are provided on the outer side of the locking pin, the metal ball is arranged corresponding to the limiting holes, and the second spring is inserted into the limiting holes.
[0012] Compared with the prior art, the electric vehicle power lock provided by this utility model has a No. 1 spring on one side of the contact point. After the contact point contacts the contact ring, the No. 1 spring can continuously apply elastic force to the contact piece, pushing the contact point to fit tightly against the surface of the contact ring. This effectively compensates for the slight displacement caused by assembly tolerance, material deformation or external vibration, and avoids the phenomenon of loosening, poor connection or momentary disconnection between the contact point and the contact ring. This ensures the stability of the circuit connection and the reliability of conductivity, and improves the continuity and safety of the electric vehicle power supply.
[0013] The locking cylinder's rotation position is mechanically limited by the combination of a second spring and a metal ball with the limiting protrusions on the inner wall of the main cylinder. When the locking cylinder rotates to the designated position for power on or off, the metal ball, under the elastic force of the second spring, embeds itself into the groove between two adjacent limiting protrusions, forming a stable positioning slot structure. This structure effectively prevents the locking cylinder from rotating on its own or slightly rotating during vehicle operation due to bumps or vibrations, ensuring that the contact between the contact point and the contact ring will not be accidentally disconnected. Only by actively rotating the lock cylinder with the key can the spring force be overcome to disengage the metal ball from the limiting position, achieving state switching and avoiding the problem of accidental power disconnection caused by vibration.
[0014] The lock cylinder and drive shaft are connected by a block and slot, while the drive shaft and lock cylinder are connected by a shaft and hole. The mating surfaces of the block, slot, shaft, and hole are all planar. This planar mating design enables stable torque transmission and avoids slippage or free rotation that may occur with cylindrical surface mating. This ensures that the rotation of the key is accurately and reliably transmitted to the lock cylinder, thereby driving the contact plate to complete the on / off action. This transmission structure is simple and reliable, ensuring the smoothness and consistency of the electric door lock operation and improving the user's operating experience. Attached Figure Description
[0015] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in this utility model. For those skilled in the art, other drawings can be obtained based on these drawings.
[0016] Figure 1 A schematic diagram of the overall structure provided for an embodiment of this utility model;
[0017] Figure 2 This is a schematic diagram of the internal structure of the secondary cylinder provided in an embodiment of the present utility model;
[0018] Figure 3 This is a schematic diagram of the slot position structure provided in an embodiment of the present utility model;
[0019] Figure 4 A schematic diagram of the contact structure provided in an embodiment of this utility model;
[0020] Figure 5 A schematic diagram of the touch ring structure provided in an embodiment of this utility model.
[0021] Explanation of reference numerals in the attached figures:
[0022] 1. Base; 2. Main cylinder; 3. Secondary cylinder; 4. Lock cylinder; 5. Drive shaft; 6. Lock pin; 7. Insert block; 8. Slot; 9. Insert shaft; 10. Insert hole; 11. T-block; 12. Contact piece; 121. Contact point; 13. T-slot; 14. Through hole; 15. Spring No. 1; 16. Encapsulation shell; 17. Contact ring; 18. Signal line; 19. Limiting hole; 20. Metal ball; 21. Spring No. 2; 22. Limiting protrusion. Detailed Implementation
[0023] To enable those skilled in the art to better understand the technical solution of this utility model, the present utility model will be further described in detail below with reference to the accompanying drawings.
[0024] As attached Figure 1 To be continued Figure 5 As shown:
[0025] Example 1:
[0026] This utility model provides a power lock for electric vehicles, comprising:
[0027] The base 1 has a main cylinder 2 fixedly installed at its top. A secondary cylinder 3 is fixedly installed at one end of the main cylinder 2. A lock cylinder 4 is installed inside the secondary cylinder 3. A drive shaft 5 is movably installed inside the secondary cylinder 3. The lock cylinder 4 is connected to the drive shaft 5. A lock pin 6 is movably installed inside the main cylinder 2. The drive shaft 5 is connected to the lock pin 6. A contact piece 12 is movably installed on one side of the lock pin 6. A contact point 121 is provided on the outside of the contact piece 12. A first spring 15 is connected to one side of the contact point 121. An encapsulation shell 16 is snapped into the main cylinder 2. Two contact rings 17 are provided on one side of the encapsulation shell 16. A signal line 18 is connected to one side of the two contact rings 17. The contact point 121 abuts against the contact rings 17. Two metal balls 20 are movably installed on the outside of the lock pin 6. A second spring 21 is provided on one side of the two metal balls 20. A limit protrusion 22 is provided inside the main cylinder 2. The metal balls 20 are snapped into one side of the limit protrusion 22.
[0028] Specifically, a plug 7 is fixedly installed at one end of the lock cylinder 4 near the drive shaft 5. A slot 8 is opened on the side of the drive shaft 5 near the lock cylinder 4. The plug 7 is inserted into the slot 8 and slides against the inner wall of the slot 8. A plug shaft 9 is fixedly installed at one end of the drive shaft 5 near the lock pin 6. A plug hole 10 is opened at the end of the lock pin 6 near the drive shaft 5. The plug shaft 9 is inserted into the plug hole 10 and slides against the inner wall of the plug hole 10.
[0029] As can be seen from the above, the base 1 is the mounting base of the integral structure, fixed to the lock hole mounting position of the electric vehicle body. The main cylinder 2 is fixedly connected to the top of the base 1. The main cylinder 2 is a cylindrical structure that houses the core electrical and transmission components such as the lock pin 6, contact plate 12, and encapsulation shell 16. The secondary cylinder 3 houses the lock cylinder 4 and the transmission shaft 5, forming a complete mechanical transmission path. The lock cylinder 4 is installed inside the secondary cylinder 3, and its exposed end is used to insert the key. A rectangular cross-section insertion block 7 is fixed at the end of the lock cylinder 4 near the transmission shaft 5. The insertion block 7 has two parallel planes. For transmitting torque, one end of the drive shaft 5 is provided with a matching slot 8, and the inner wall of the slot 8 is also provided with a corresponding plane. When the key turns the lock cylinder 4, the insert block 7 drives the drive shaft 5 to rotate synchronously. This planar mating structure ensures the stability of power transmission. One end of the drive shaft 5 is fixedly provided with an insert shaft 9, and the outer surface of the insert shaft 9 is provided with a planar structure. The lock pin 6 is provided with an insertion hole 10 on the side near the drive shaft 5, and its inner wall is provided with a plane that matches the insert shaft 9. When the drive shaft 5 rotates, the insert shaft 9 drives the insertion hole 10 to rotate synchronously, thereby driving the lock pin 6 to rotate.
[0030] Specifically, a T-shaped block 11 is fixedly installed at the end of the locking post 6 away from the insertion hole 10. A T-shaped groove 13 is opened on the contact piece 12, and the T-shaped groove 13 is sleeved on the outside of the T-shaped block 11. Several through holes 14 are opened on the side of the locking post 6 near the contact piece 12. A first spring 15 is inserted into the through hole 14. The encapsulation shell 16 is set inside the main cylinder 2 on the side near the contact piece 12. The signal line 18 is set on the side of the encapsulation shell 16 away from the contact ring 17. Two limiting holes 19 are opened on the outside of the locking post 6. The metal ball 20 is set correspondingly to the limiting hole 19. A second spring 21 is inserted into the limiting hole 19.
[0031] As can be seen from the above, a T-shaped block 11 is fixedly provided at the end of the locking pin 6 away from the insertion hole 10. The contact piece 12 is a conductive metal sheet with a T-shaped groove 13 that matches the T-shaped block 11. After the T-shaped block 11 is inserted into the T-shaped groove 13, the contact piece 12 can rotate synchronously with the locking pin 6 and slide axially along the T-shaped block 11. This structure ensures both the circumferential linkage between the contact piece 12 and the locking pin 6 and provides axial movement space for the contact point 121 to be pressed. The contact piece 12 is made of phosphor bronze material with good conductivity and has a welded outer side. The silver alloy contact 121 is used to achieve circuit conduction. One side of the contact 121 is connected to the locking post 6 via a first spring 15. Three first springs 15 are provided, each inserted into a through hole 14 on the locking post 6. One end of each spring abuts against the locking post 6, and the other end pushes against the contact piece 12. When the contact 121 contacts the contact ring 17, the first spring 15 continuously applies elastic pressure, ensuring that the contact 121 always fits tightly against the surface of the contact ring 17, effectively preventing poor contact caused by vibration, oxidation, or assembly errors. The encapsulation shell 1... 6 is an insulating plastic component, snapped into the interior of the main cylinder 2 near the contact piece 12. Two annular metal contact rings 17 are embedded inside, corresponding to the positive and negative terminals of the power supply (or the main circuit and accessory circuit), respectively. A signal line 18 is connected to the outside of the contact rings 17, extending from the end of the encapsulation shell 16 away from the contact piece 12 and connecting to the electric vehicle's wiring harness. Two annularly distributed limiting holes 19 are opened on the outside of the locking post 6. A metal ball 20 and a second spring 21 are installed in each limiting hole 19. The inner wall of the main cylinder 2... Multiple arc-shaped limiting protrusions 22 are arranged in a ring array. When the locking pin 6 is rotated to the designated position, the metal ball 20 is ejected outward under the elastic force of the second spring 21 and gets stuck in the groove between two adjacent limiting protrusions 22, forming a mechanical self-lock. Only by applying sufficient torque (by rotating the key) can the metal ball 20 overcome the spring force and slide out of the current groove to enter the next position, effectively preventing the locking pin 6 from rotating back on its own due to vehicle vibration, avoiding accidental disconnection of the contact 121, and improving the stability of the energized state.
[0032] Working principle: When the key is not inserted or in the closed position, the lock cylinder 6 is in the initial position, the contact 121 is separated from the contact ring 17, and the circuit is broken. At this time, the metal ball 20 is embedded between a set of limiting protrusions 22 under the action of the second spring 21, locking the lock cylinder 6 and preventing it from rotating slightly due to vibration. When the user inserts the key into the lock cylinder 4 and rotates it clockwise, the lock cylinder 4 drives the insert block 7 to rotate. The insert block 7 drives the slot 8 to rotate the drive shaft 5 synchronously. The drive shaft 5 drives the lock cylinder 6 to rotate through the insert shaft 9 and the insert hole 10. During the rotation of the lock cylinder 6, the T-shaped block 11 drives the contact piece 12 to rotate together, so that the contact 121 gradually approaches and eventually contacts the contact ring 17. At the same time, the first spring 15 is compressed, continuously pushing the contact 121 to press tightly against the contact ring 17 to ensure good conduction. At the same time, the rotation of the locking cylinder 6 causes the metal ball 20 to overcome the pressure of the second spring 21, slide out of the current limiting groove, and automatically fall into the groove between the next set of limiting protrusions 22 after rotating into place. Under the action of the spring, it is re-locked, realizing mechanical self-locking. At this time, the contact 121 is in stable contact with the contact ring 17, the electric vehicle power system is powered, and it can start and drive normally. Since the metal ball 20 is firmly locked between the limiting protrusions 22, even if the vehicle is driving on a bumpy road, the locking cylinder 6 cannot be reversed. When the key is used to rotate the lock cylinder 4 counterclockwise again, the entire transmission chain moves in the opposite direction, the contact 121 is disengaged from the contact ring 17, the circuit is cut off, and the metal ball 20 jumps back to the initial limiting position during rotation, completing the power-off locking. The key can be removed, and the vehicle enters the safe power-off state.
[0033] The foregoing description only illustrates certain exemplary embodiments of the present invention. Undoubtedly, those skilled in the art can modify the described embodiments in various ways without departing from the spirit and scope of the present invention. Therefore, the above drawings and descriptions are illustrative in nature and should not be construed as limiting the scope of protection of the claims of the present invention.
Claims
1. A power lock for an electric vehicle, characterized in that, include: A base (1) is provided, and a main cylinder (2) is fixedly installed at the top of the base (1). A secondary cylinder (3) is fixedly installed at one end of the main cylinder (2). A lock cylinder (4) is provided inside the secondary cylinder (3). A drive shaft (5) is movably installed inside the secondary cylinder (3). The lock cylinder (4) is connected to the drive shaft (5). A lock pin (6) is movably installed inside the main cylinder (2). The drive shaft (5) is connected to the lock pin (6). A contact piece (12) is movably installed on one side of the lock pin (6). A contact point (121) is provided on the outside of the contact piece (12). 1) A first spring (15) is connected to one side. A package shell (16) is snapped into the inside of the main cylinder (2). Two contact rings (17) are provided on one side of the package shell (16). A signal line (18) is connected to one side of the two contact rings (17). The contact point (121) abuts against the contact ring (17). Two metal balls (20) are movably installed on the outside of the locking post (6). A second spring (21) is provided on one side of the two metal balls (20). A limit protrusion (22) is provided inside the main cylinder (2). The metal balls (20) are snapped into one side of the limit protrusion (22).
2. The electric vehicle power lock according to claim 1, characterized in that, A plug (7) is fixedly installed on one end of the lock cylinder (4) near the drive shaft (5). A slot (8) is opened on the side of the drive shaft (5) near the lock cylinder (4). The plug (7) is inserted into the slot (8) and slides against the inner wall of the slot (8). A plug shaft (9) is fixedly installed on one end of the drive shaft (5) near the lock pin (6). A plug hole (10) is opened on one end of the lock pin (6) near the drive shaft (5). The plug shaft (9) is inserted into the plug hole (10) and slides against the inner wall of the plug hole (10).
3. The electric vehicle power lock according to claim 2, characterized in that, A T-shaped block (11) is fixedly installed at the end of the locking pin (6) away from the insertion hole (10), and a T-shaped groove (13) is opened on the contact piece (12), which is sleeved on the outside of the T-shaped block (11).
4. The electric vehicle power lock according to claim 3, characterized in that, The locking pin (6) has several through holes (14) on the side near the contact piece (12), and the first spring (15) is inserted into the through hole (14).
5. The electric vehicle power lock according to claim 1, characterized in that, The encapsulation shell (16) is located inside the main cylinder (2) on the side close to the contact piece (12), and the signal line (18) is located on the side of the encapsulation shell (16) away from the contact ring (17).
6. The electric vehicle power lock according to claim 1, characterized in that, Two limiting holes (19) are provided on the outside of the locking pin (6). The metal ball (20) is set in correspondence with the limiting holes (19). The second spring (21) is inserted into the limiting hole (19).