Locking mechanism and battery pack locking unit of electric vehicle

Abstract

The present application belongs to the field of automobile parts, and particularly relates to a locking mechanism, comprising: a base, which is provided with a lock slot for accommodating a lock shaft on an automobile battery pack; a lock tongue, which is rotationally connected with the base and is used for opening or closing the lock slot; and an anti-dropping piece, which is rotationally arranged on the base and has an end capable of extending into or out of the lock slot; when the anti-dropping piece extends into the lock slot, the end thereof can abut against the lock shaft, and the lock shaft is tightly abutted against the lock tongue and the inner wall of the lock slot. Compared with the prior art, the locking mechanism can stably lock the lock shaft in the lock slot, and prevent voltage instability caused by the shaking of the battery pack and the connection between the battery pack and the vehicle when the vehicle shakes.

Description

Technical Field

[0001] This invention belongs to the field of automotive parts, and specifically relates to a locking mechanism. Background Technology

[0002] Currently, electric vehicle batteries are generally installed in two ways: fixed and swappable. Fixed batteries are typically fixed to the vehicle and are charged directly from the vehicle. Swappable batteries, on the other hand, are usually mounted on a bracket in the vehicle using a movable installation method. The battery can be removed for individual replacement or charging. After the removed battery is fully charged, it is then reinstalled in the vehicle.

[0003] In existing technologies, battery replacement methods include manual and automatic methods. Regardless of the method, when the battery is installed on the vehicle's bracket, the bracket must lock the battery onto the bracket. For example, in the lock base and locking mechanism with announcement number CN213705146U, the lock base includes a base body and a locking tongue. The locking tongue is rotatably mounted on the base body and switches between locked and unlocked states, allowing the locking shaft to disengage from or enter the lock groove. When locked, the spring force can make the locking shaft resist the locking tongue. However, vibrations during vehicle operation can cause the locking shaft to easily wobble up and down and left and right in the lock groove, causing the connection between the battery pack and the car to loosen and resulting in voltage instability. Excessive vibration may also cause the locking shaft to disengage from the lock groove. Summary of the Invention

[0004] The technical problem to be solved by the present invention is to provide a locking mechanism in view of the current state of the prior art.

[0005] The technical solution adopted by the present invention to solve the above-mentioned technical problems is as follows: a locking mechanism is proposed, comprising: a base having a locking groove, wherein the locking groove is used to accommodate a locking shaft on an automotive battery pack;

[0006] A locking tongue, which is rotatably connected to the base, is used to open or close the locking groove;

[0007] An anti-detachment component is rotatably mounted on the base, and the end of the anti-detachment component can extend into or disengage from the locking groove;

[0008] When the anti-disengagement component extends into the lock groove, its end can abut against the lock shaft, causing the lock shaft to press against the lock tongue and the inner wall of the lock groove.

[0009] In the above-mentioned locking mechanism, the anti-disengagement component includes: an anti-disengagement shaft, which is rotatably connected to the base, and a pressing part is provided on the anti-disengagement shaft, which can extend into or disengage from the lock groove; when the pressing part extends into the lock groove, the pressing part, the lock tongue, and the inner wall of the lock groove are arranged in a triangular position.

[0010] In the aforementioned locking mechanism, the anti-detachment shaft is provided with a connecting part and a transmission part at both ends, the connecting part is rotatably connected to the base, and the pressing part is located between the connecting part and the transmission part and close to the connecting part.

[0011] In one of the locking mechanisms described above, an adsorption device is provided on the base. The adsorption device is located below the transmission part and is used to drive the transmission part to move downward.

[0012] In one of the locking mechanisms described above, a limiting shaft is provided on the base, the locking tongue can abut against the limiting shaft, the limiting shaft is located above the connection between the locking tongue and the base, and the locking arc surface is located below the connection between the locking tongue and the base.

[0013] In one of the locking mechanisms described above, the adsorption device includes an electromagnet. When the electromagnet is energized, it generates an attractive force and attracts the transmission part to the electromagnet.

[0014] In one of the locking mechanisms described above, a tension spring is provided at the upper end of the transmission part, and the tension spring is connected to the base.

[0015] In the above-mentioned locking mechanism, the locking tongue is provided with a locking arc surface, the pressing part is provided with a pressing arc surface, the locking groove has a supporting surface, and the locking arc surface, the pressing arc surface and the supporting surface are arranged in a triangle.

[0016] In one of the locking mechanisms described above, a mounting groove is provided in the base, and a push-off spring is provided in the mounting groove. The push-off spring extends into the locking groove and abuts against the locking shaft.

[0017] In one of the locking mechanisms described above, the abutting spring is horizontally positioned and flush with the locking arc surface.

[0018] A battery pack locking unit for an electric vehicle includes: a pull rod rotatably connected to a locking tongue, a return spring provided on the pull rod, and the return spring being connected to a base.

[0019] Compared with the prior art, the advantage of the present invention is that the locking mechanism can stably lock the locking shaft in the locking groove, preventing voltage instability caused by the shaking of the connection between the battery pack and the vehicle when the vehicle shakes. Attached Figure Description

[0020] Figure 1 This is a three-dimensional view of the locking mechanism;

[0021] Figure 2 This is a three-dimensional view of the locking mechanism without the locking shaft.

[0022] Figure 3This is a cross-sectional view of the locking mechanism in the locked state;

[0023] Figure 4 This is a cross-sectional view of the locking mechanism in the unlocked state;

[0024] Figure 5 This is a three-dimensional view of the battery pack locking unit of an electric vehicle in the locked state.

[0025] Figure 6 This is a 3D view of the battery pack locking unit of an electric vehicle in the unlocked state.

[0026] In the diagram, 1. Base; 2. Lock groove; 3. Lock shaft; 4. Lock tongue; 5. Anti-disengagement shaft; 6. Pressing part; 7. Connecting part; 8. Transmission part; 9. Electromagnet; 10. Limiting shaft; 11. Tension spring; 12. Locking arc surface; 13. Pressing arc surface; 14. Support surface; 15. Mounting groove; 16. Pushing spring; 17. Pull rod; 18. Return spring. Detailed Implementation

[0027] The following are specific embodiments of the present invention, which are described in conjunction with the accompanying drawings. However, the present invention is not limited to these embodiments.

[0028] like Figure 1 As shown, this locking mechanism includes: a base 1, which has a locking groove 2 for accommodating a locking shaft 3 on a car battery pack; a locking tongue 4, which is rotatably connected to the base 1 and is used to open or close the locking groove 2; and an anti-detachment component, which is rotatably mounted on the base 1 and whose end can extend into or out of the locking groove 2. When the anti-detachment component extends into the locking groove 2, its end can abut against the locking shaft 3, causing the locking shaft 3 to press against the locking tongue 4 and the inner wall of the locking groove 2.

[0029] The latch 4 can rotate relative to the base 1, allowing the latch 4 to open or close the lock groove 2. When the lock groove 2 is open, the lock shaft 3 can enter or exit the lock groove 2. When closed, the latch 4 can restrict the lock shaft 3 within the lock groove 2. However, in order for the latch 4 to open and close normally, the length of the lock groove 2 must be greater than the diameter of the lock shaft 3, so that the lock shaft 3 can move away from the latch 4 to provide rotation space for the latch 4. The anti-disengagement component is rotatably mounted on the base 1. When the lock shaft 3 is located within the lock groove 2, the anti-disengagement component rotates so that its end extends into the lock groove 2, and the anti-disengagement component can abut against the lock shaft 3 so that the lock shaft 3 presses against the latch 4 and the inner wall of the lock groove 2. During vehicle operation, the anti-disengagement shaft 5 continuously provides a stable thrust to the lock shaft 3, so that the lock shaft 3 can be surrounded between the anti-disengagement shaft 5, the latch 4, and the contact surface with the lock groove 2, so that the lock shaft 3 is firmly locked. Vibrations during driving will not cause the lock shaft 3 to shake, making the vehicle voltage more stable.

[0030] The anti-detachment component includes: an anti-detachment shaft 5, which is rotatably connected to the base 1. The anti-detachment shaft 5 is provided with a pressing part 6, which can extend into or out of the locking groove 2. When the pressing part 6 extends into the locking groove 2, the pressing part 6, the locking tongue 4, and the inner wall of the locking groove 2 are arranged in a triangular position.

[0031] When the anti-detachment shaft 5 rotates, it can drive the squeezing part 6 to extend into the locking groove 2, so that the squeezing part 6 abuts against the locking shaft 3 and drives the locking shaft 3 to press against the locking tongue 4 against the inner wall of the locking groove 2. The squeezing part 6, the locking tongue 4 and the inner wall of the locking groove 2 are arranged in a triangular position. The pressure applied by the squeezing part 6 to the locking shaft 3 is between the contact points of the locking tongue 4 and the locking shaft 3 and the inner wall of the locking groove 2, so that the locking shaft 3 can press against the locking tongue 4 and the inner wall of the locking groove 2. The position of the locking shaft 3 is restricted by three points to prevent the locking shaft 3 from shaking.

[0032] The anti-detachment shaft 5 is provided with a connecting part 7 and a transmission part 8 at both ends. The connecting part 7 is rotatably connected to the base 1, and the pressing part 6 is located between the connecting part 7 and the transmission part 8 and is close to the connecting part 7.

[0033] The transmission part 8 is used to drive the anti-detachment shaft 5 to rotate as a whole, so that the pressing part 6 is close to or away from the locking shaft 3. The pressing part 6 is located close to the connecting part 7, so that the transmission part 8 increases the torque after being subjected to force, thereby improving the vibration resistance of the locking shaft 3.

[0034] An adsorption device is provided on the base 1. The adsorption device is located below the transmission part 8 and is used to drive the transmission part 8 to move downward.

[0035] The adsorption device can drive the transmission part 8 to move downward, thereby allowing the squeezing part 6 to enter the locking groove 2 and press against the locking shaft 3.

[0036] The adsorption device includes an electromagnet 9. When the electromagnet 9 is energized, it generates an attractive force and attracts the transmission part 8 to the electromagnet 9.

[0037] Electromagnet 9 is used to provide downward pressure to transmission unit 8. Electromagnet 9 can be connected to a power source through a corresponding control component in the vehicle, making it convenient to energize or de-energize electromagnet 9.

[0038] A tension spring 11 is provided at the upper end of the transmission part 8, and the tension spring 11 is connected to the base 1.

[0039] When the electromagnet 9 is de-energized, the tension spring 11 provides a restoring force, causing the pressing part 6 to move away from the locking shaft 3, thereby allowing the locking shaft 3 to move and providing rotation space for the locking tongue 4.

[0040] The locking tongue 4 is provided with a locking arc surface 12, the pressing part 6 is provided with a pressing arc surface 13, the locking groove 2 has a supporting surface 14, the pressing arc surface 13 is located above the locking arc surface 12, and the locking arc surface 12, the pressing arc surface 13 and the supporting surface 14 are arranged in a triangle.

[0041] The locking arc surface 12 and the abutting arc surface 13 can fit more closely with the locking shaft 3, providing a more stable abutting force. The curvature of the arc surface can be adapted to the size of the locking shaft 3.

[0042] A limiting shaft 10 is provided on the base 1. When the locking tongue 4 is in the locked state, the locking tongue 4 can abut against the limiting shaft 10. The limiting shaft 10 is located above the connection between the locking tongue 4 and the base 1, and the locking arc surface 12 is located below the connection between the locking tongue 4 and the base 1.

[0043] The limiting shaft 10 can limit the rotation angle of the locking tongue 4. When the pressing part 6 presses the locking shaft 3, the locking shaft 3 can give a pushing force to the locking arc surface 12, which will cause the locking tongue 4 to have a tendency to rotate. The locking tongue 4 abuts against the limiting shaft 10 to prevent the locking tongue 4 from being opened.

[0044] The base 1 has an installation groove 15, and a push spring 16 is installed in the installation groove 15. The push spring 16 extends into the lock groove 2 and abuts against the lock shaft 3.

[0045] When the locking shaft 3 enters the locking groove 2, the abutting spring 16 can abut against the locking shaft 3, so that the locking shaft 3 initially abuts against the locking arc surface 12, preventing the pressing arc surface 13 from not being able to fit the locking shaft 3 and causing jamming when the pressing part 6 presses the locking shaft 3 later.

[0046] The abutting spring 16 is horizontally positioned and flush with the locking arc surface 12 to prevent the force of the abutting spring 16 from canceling out the force of the pressing part 6. On the other hand, it can further tighten the locking shaft 3 against the locking tongue 4.

[0047] A battery pack locking unit for an electric vehicle includes: a pull rod 17 rotatably connected to a locking tongue 4, and a return spring 18 provided on the pull rod 17, the return spring 18 being connected to a base.

[0048] It should be noted that all directional indications (such as up, down, left, right, front, back, etc.) in the embodiments of the present invention are only used to explain the relative positional relationship and movement of each component in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indication will also change accordingly.

[0049] Furthermore, in this invention, descriptions involving terms such as "first," "second," and "a" are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this invention, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0050] In this invention, unless otherwise explicitly specified and limited, the terms "connection," "fixed," etc., should be interpreted broadly. For example, "fixed" can mean a fixed connection, a detachable connection, or an integral part; it can mean a mechanical connection or an electrical connection; it can mean a direct connection or an indirect connection through an intermediate medium; it can mean the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0051] Furthermore, the technical solutions of the various embodiments of the present invention can be combined with each other, but only if they are based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be considered that such combination of technical solutions does not exist and is not within the scope of protection claimed by the present invention.

Claims

1. A locking mechanism, characterized in that, include: The base has a locking groove for accommodating the locking shaft on the car battery pack; A locking tongue, which is rotatably connected to the base, is used to open or close the locking groove; An anti-detachment component is rotatably mounted on the base, and the end of the anti-detachment component can extend into or disengage from the locking groove. The anti-detachment component includes an anti-detachment shaft. The anti-detachment shaft is provided with a connecting part and a transmission part at both ends, and an adsorption device is provided on the base. The adsorption device is located below the transmission part and is used to drive the transmission part to move downward. When the anti-disengagement component extends into the lock groove, its end can abut against the lock shaft, causing the lock shaft to press against the lock tongue and the inner wall of the lock groove.

2. The locking mechanism according to claim 1, characterized in that, The anti-detachment shaft is rotatably connected to the base, and the anti-detachment shaft is provided with a pressing part, which can extend into or disengage from the lock groove; when the pressing part extends into the lock groove, the pressing part, the lock tongue, and the inner wall of the lock groove are arranged in a triangular position.

3. A locking mechanism according to claim 2, characterized in that, The connecting part is rotatably connected to the base, and the pressing part is located between the connecting part and the transmission part and close to the connecting part.

4. A locking mechanism according to claim 1, characterized in that, The base is provided with a limiting shaft, and the locking tongue can abut against the limiting shaft. The limiting shaft is located above the connection between the locking tongue and the base, and a locking arc surface is provided below the connection between the locking tongue and the base.

5. A locking mechanism according to claim 1, characterized in that, A tension spring is provided at the upper end of the transmission part, and the tension spring is connected to the base.

6. A locking mechanism according to claim 2, characterized in that, The locking tongue is provided with a locking arc surface, the pressing part is provided with a pressing arc surface, and the locking groove has a supporting surface. The locking arc surface, the pressing arc surface, and the supporting surface are arranged in a triangle.

7. A locking mechanism according to claim 4, characterized in that, The base has an installation groove, and a push spring is installed in the installation groove. The push spring extends into the lock groove and abuts against the lock shaft.

8. A locking mechanism according to claim 7, characterized in that, The abutting spring is horizontally positioned and flush with the locking arc surface.

9. A battery pack locking unit for an electric vehicle, comprising the locking mechanism according to any one of claims 1 to 8, characterized in that: It also includes a pull rod, which is rotatably connected to the locking tongue, and a return spring is provided on the pull rod, which is connected to the base.

Images