Locking mechanism, battery pack and vehicle

Abstract

The utility model discloses a locking mechanism, a battery pack and a vehicle, and relates to the field of new energy automobiles. The locking mechanism comprises a connecting base, a connecting piece and a limiting rod, the connecting base is provided with a first side face and a second side face which are opposite, and a first through hole and a second through hole which penetrate from the first side face to the second side face are formed in the connecting base. The connecting piece comprises a rod body and a limiting part connected with the rod body, the limiting part is located on the side, provided with the first side face, of the connecting base, the rod body penetrates through the first through hole to be connected with an external piece, and a limiting hole right opposite to the second through hole is formed in the limiting part; the limiting rod penetrates through the second through hole, and the end of the limiting rod is matched in the limiting hole so as to limit rotation of the connecting piece around the axis of the first through hole. According to the locking mechanism, the structure is simple, meanwhile, the torque of the connecting piece can be effectively controlled, the reliability of the locking mechanism is improved, and the service life of the locking mechanism is prolonged.

Description

Technical Field

[0001] The utility model relates to the field of new energy vehicles, in particular to a locking mechanism, a battery pack and a vehicle. Background Art

[0002] In the field of existing battery-swapping new energy vehicles, some vehicles adopt a bolt-type locking mechanism to achieve flexible disassembly and assembly between the vehicle and the battery pack. This bolt-type locking mechanism is favored because of its small occupied space and compact layout, effectively improving the utilization rate of the internal space of the vehicle. However, it is difficult to precisely control the tightening degree of the bolts in the bolt-type locking mechanism. Over-tightening the bolts may cause fatigue problems of the bolt material, and in the long run, it may also lead to torque attenuation, thereby affecting the stability and reliability of the locking mechanism.

[0003] Therefore, how to optimize the design of the locking mechanism to avoid the problems caused by over-tightening of the bolts has become an urgent problem to be solved. Summary of the Utility Model

[0004] The utility model aims to at least solve one of the technical problems existing in the prior art. For this reason, the first aspect of the utility model aims to propose a locking mechanism, the structure of which is simple, and at the same time, it can effectively control the torque of the connecting piece, improving the reliability and service life of the locking mechanism.

[0005] The second aspect of the utility model aims to propose a battery pack.

[0006] The third aspect of the utility model aims to propose a vehicle.

[0007] According to the locking mechanism of the first aspect embodiment of the utility model, the locking mechanism includes: a connecting seat, the connecting seat has a first side surface and a second side surface opposite to each other, and the connecting seat is provided with a first through hole and a second through hole penetrating from the first side surface to the second side surface; a connecting piece, including a rod body and a limiting portion connecting the rod body, the limiting portion is located on the side of the connecting seat provided with the first side surface, the rod body passes through the first through hole to connect an external member, and a limiting hole facing the second through hole is provided on the limiting portion; a limiting rod, passing through the second through hole, and the end portion is fitted in the limiting hole to limit the connecting piece from rotating around the axis of the first through hole.

[0008] The locking mechanism according to the first - aspect embodiments of the present utility model realizes the circumferential limiting function of the connecting piece by setting the cooperation mechanism between the limiting rod and the limiting hole. This design simplifies the structure of the locking mechanism, improves its working efficiency and stability. When the end of the limiting rod is inserted into the limiting hole, it effectively prevents the free rotation of the connecting piece around the axis of the first through - hole, thereby ensuring that the connecting piece remains stationary during the connection process and avoiding loosening caused by vibration. The locking mechanism of the present utility model realizes the effective control and protection of the connecting piece through the limiting design, providing guarantee for the connection safety of the locking mechanism.

[0009] In the locking mechanism according to some embodiments of the present utility model, the rod body includes a threaded section, and the threaded section is located on the side of the connecting seat where the second side face is provided, for threaded connection with the external part.

[0010] In the locking mechanism according to some embodiments of the present utility model, the rod body further includes: a connecting section, the connecting section is located on the side of the connecting seat where the first side face is provided, and the connecting section connects the limiting part; an assembling section, the assembling section is located at the end of the rod body far from the threaded section, and the assembling section is a non - rotating body.

[0011] In the locking mechanism according to some embodiments of the present utility model, the assembling section is hexagonal to be adapted to an electric wrench, or the outer peripheral surface of the assembling section is provided with circumferentially distributed tooth grooves.

[0012] In the locking mechanism according to some embodiments of the present utility model, the limiting part and the rod body are integrally formed.

[0013] In the locking mechanism according to some embodiments of the present utility model, the limiting part is annular and surrounds the rod body. The limiting part has a first assembling surface in contact with the first side face and a second assembling surface opposite to the first assembling surface. The distance between the second assembling surface and the first assembling surface gradually decreases in the direction from the center to the outer periphery.

[0014] In the locking mechanism according to some embodiments of the present utility model, there are at least two second through - holes, and a plurality of the second through - holes are circumferentially arranged with the first through - hole as the center; there are at least two limiting rods, which are respectively inserted into the second through - holes one by one, and there are at least two limiting holes, and each limiting hole is correspondingly arranged for each second through - hole.

[0015] In the locking mechanism according to some embodiments of the present utility model, the limiting hole is a blind hole, the axial length of the second through - hole is L1, the axial length of the limiting hole is L2, and the length of the limiting rod is L3, satisfying: L3 > L1 + L2.

[0016] According to the battery pack of the second aspect embodiment of the present utility model, a locking mechanism according to the first aspect embodiment of the present utility model is provided on the housing of the battery pack; wherein, the connecting seat of the locking mechanism is fixedly connected to the housing, or a part of the housing constitutes the connecting seat.

[0017] According to a vehicle of the third aspect embodiment of the present utility model, it includes: a vehicle body; a battery pack, the battery pack is the battery pack according to the second aspect of the present utility model, and the battery pack is detachably connected to the vehicle body through the locking mechanism.

[0018] The additional aspects and advantages of the present utility model will be partially given in the following description, partially will become obvious from the following description, or be understood through the practice of the present utility model. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The above and / or additional aspects and advantages of the present utility model will become obvious and easy to understand from the description of the embodiments in conjunction with the following drawings, wherein:

[0020] Figure 1 is a schematic structural diagram of the locking mechanism in the embodiment of the present utility model;

[0021] Figure 2 is an exploded view of the locking mechanism in the embodiment of the present utility model;

[0022] Figure 3 is a cross-sectional view of the locking mechanism in the embodiment of the present utility model;

[0023] Figure 4 is a schematic diagram of the dimensions of the second through hole, the limiting hole and the limiting rod in the embodiment of the present utility model.

[0024] REFERENCE SIGNS:

[0025] Locking mechanism 100,

[0026] Connecting seat 10, first side surface 101, second side surface 102, first through hole 103, second through hole 104,

[0027] Connecting member 20, rod body 21, threaded section 211, connecting section 212, assembling section 213, tooth groove 2131, limiting portion 22, first assembling surface 221, second assembling surface 222, limiting hole 223,

[0028] Limiting rod 30. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0029] Embodiments of the present utility model will be described in detail below. Examples of the embodiments are shown in the accompanying drawings, where the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present utility model and should not be construed as a limitation of the present utility model.

[0030] In the description of the present utility model, it should be understood that the orientation or positional relationships indicated by the terms "center", "length", "width", "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", "axial", "radial", "circumferential", etc. are based on the orientation or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as a limitation of the present utility model. In addition, features defined as "first" and "second" may explicitly or implicitly include one or more of such features. In the description of the present utility model, unless otherwise specified, the meaning of "a plurality" is two or more.

[0031] In the description of the present utility model, it should be noted that, unless otherwise clearly specified and defined, the terms "mounted", "connected" and "coupled" should be understood in a broad sense. For example, it may be a fixed connection, a detachable connection or an integral connection; it may be a mechanical connection or an electrical connection; it may be directly connected or indirectly connected through an intermediate medium, and it may be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific situations.

[0032] Reference will be made below Figure 1 - Figure 4 to describe the locking mechanism 100 according to an embodiment of the present utility model.

[0033] As Figure 1 shown, for the locking mechanism 100 according to some embodiments of the first aspect of the present utility model, the application field of the locking mechanism 100 is not limited. For example: such a locking mechanism 100 can be applied to the battery pack of a new energy vehicle to achieve the positioning and locking of the battery pack. For the sake of simplicity of description, hereinafter, the locking mechanism 100 is applied to the vehicle-mounted battery pack as an example to describe the structure of the locking mechanism 100, and the scenarios where the locking mechanism 100 is applied to other devices will not be elaborated.

[0034] It should be noted that, in some embodiments, the locking mechanism 100 is installed on the battery pack, and the corresponding external component is arranged on the vehicle frame. When the locking mechanism 100 is connected to the external component, the positioning and locking of the battery pack and the vehicle frame can be achieved, ensuring the stability and safety of the battery pack during vehicle driving. When the battery pack needs to be disassembled, simply separating the locking mechanism 100 from the external component can easily achieve the disassembly of the battery pack, providing convenience for battery replacement and maintenance.

[0035] Then, according to the connection convenience between the locking mechanism 100 and the external component, the locking mechanism 100 can be applied to vehicles that require rapid battery swapping, thereby making the battery swapping process of the vehicle extremely convenient and improving the battery swapping efficiency.

[0036] There are also some other embodiments in the present application. The locking mechanism 100 is arranged on the vehicle frame, and the corresponding external component is arranged on the battery pack. Such an arrangement can also achieve the positioning and locking between the battery pack and the vehicle frame.

[0037] After the installation position of the locking mechanism 100 is determined, the installation position of the corresponding external component can be adaptively designed. In the following description of the present utility model, the case where the locking mechanism 100 is arranged on the battery pack is taken as an example for illustration.

[0038] As Figure 1 shown, the locking mechanism 100 according to the first aspect embodiment of the present utility model includes: a connection seat 10, a connecting member 20, and a limiting rod 30.

[0039] It can be understood that when the locking mechanism 100 is arranged on the battery pack, the connection seat 10 is arranged on the battery pack. In some other solutions, the locking mechanism 100 is arranged on the vehicle frame. At this time, the connection seat 10 is correspondingly arranged on the vehicle frame.

[0040] The connection seat 10 has opposite first side surface 101 and second side surface 102. The connection seat 10 is provided with a first through hole 103 and a second through hole 104 that penetrate from the first side surface 101 to the second side surface 102.

[0041] The shape of the connection seat 10 is very flexible. The connection seat 10 can be a plate body, and the plate body can be, for example: a circular plate body, a semi-circular plate body, a triangular plate body, a trapezoidal plate body, a rectangular plate body and other polygonal plate bodies, or other irregularly shaped plate bodies.

[0042] Of course, in some other embodiments, the connection seat 10 can also be a three-dimensional shape. For example, it is a cylinder, a cube or other polygonal three-dimensional shapes.

[0043] Combined with Figure 1 - Figure 2 , the connection seat 10 is a cylinder, and a chamber is formed inside the cylinder. Combined withFigure 3 The first side 101 is located in the chamber, and the second side 102 is located outside the cylinder.

[0044] The connecting member 20 includes a rod body 21 and a limiting portion 22 connecting the rod body 21. The limiting portion 22 is located on the side of the connecting seat 10 where the first side 101 is provided. The rod body 21 passes through the first through hole 103 to connect to an external component, and a limiting hole 223 is provided on the limiting portion 22 opposite to the second through hole 104.

[0045] In the above technical solution, the rod body 21, as the main part of the connecting member 20, passes through the first through hole 103 of the connecting seat 10. Such a design enables the rod body 21 to be connected to an external component, thereby achieving the effect of combining the locking mechanism 100 with an external structure.

[0046] It is particularly worth noting that during the actual use of the vehicle, due to factors such as uneven road surfaces and driving vibrations, loosening may occur between the rod body 21 and the external component. As a result, the rod body 21 may rotate backward and become disengaged, affecting the stability of the battery. Additionally, if it is tightened too much during installation, although a tight connection can be ensured in the short term, during frequent use, due to factors such as material fatigue and stress relaxation, torque attenuation may occur, which will also affect the stability of the battery. To solve the above problems, the locking mechanism 100 of the embodiment of the present utility model further includes a limiting rod 30.

[0047] As Figure 1 - Figure 4 shown, the limiting rod 30 passes through the second through hole 104 and its end is fitted in the limiting hole 223 to limit the rotation of the connecting member 20 around the axis L of the first through hole 103.

[0048] Specifically, when the limiting rod 30 passes through the second through hole 104 of the connecting seat 10 and precisely falls into the limiting hole 223 on the limiting portion 22 of the connecting member 20, it is effectively limited by the second through hole 104. This design can ensure that the limiting portion 22 cannot rotate freely, thereby effectively preventing the rotation of the rod body 21. Through such a mechanism, the stability and reliability of the locking mechanism 100 during vehicle use are improved. Even in the face of adverse conditions such as vibrations, it can ensure a tight connection between the connecting member 20 and the external component, effectively avoiding loosening and rotational disengagement, and ensuring the pre-tightening force of the rod body 21.

[0049] In some alternative embodiments, as Figure 2 - Figure 3As shown, the limiting part 22 extends outward with the rod body 21 as the center, so that there is enough space on the limiting part 22 to set the second through hole 104. It is worth noting that the shape of the limiting part 22 can be very flexible, not limited to a certain specific shape, as long as one end of the limiting part 22 is connected to the rod body 21 and the other end extends in a direction away from the rod body 21, so that the second through hole 104 can be opened on the surface of the limiting part 22. For example, the limiting part 22 can be fan-shaped, circular ring-shaped, etc. Among them, the "circular ring shape" is understood in a broad sense. For example, it can also be a "polygonal ring", etc.

[0050] Optionally, the cross-section of the limiting rod 30 is designed as Figure 2 the circular shape shown, or semi-circular, and can also be designed as polygons such as trapezoids, rectangles, and other irregular shapes.

[0051] Optionally, when the cross-section of the limiting rod 30 is polygonal, the shapes of the second through hole 104 and the limiting hole 223 correspond to the cross-sectional shape of the limiting rod 30.

[0052] In some alternative embodiments, there is more than one second through hole 104 and more than one limiting hole 223.

[0053] For example, when both the second through hole 104 and the limiting hole 223 are set to one, in order to ensure that the limiting rod 30 can smoothly fall into the limiting hole 223, the connecting member 20 needs to be rotated until the limiting hole 223 is accurately aligned with the second through hole 104. In this specific alignment state, the tightening torque of the connecting member 20 exactly reaches the preset tightening torque value. Such a design realizes the precise control of the tightening torque of the connecting member 20, effectively prevents the connecting member 20 from being too loose or too tight, and thus ensures the firm and reliable connection between the locking mechanism 100 and the external component.

[0054] Another example is when there is one second through hole 104 and more than one limiting hole 223. During the rotation of the connecting member 20, the second through hole 104 has the opportunity to pass by multiple limiting holes 223. If the limiting rod 30 misses a limiting hole 223 during the first attempt to fall, then through the continuous rotation of the connecting member 20, it can still be aligned and fall into the next limiting hole 223. Such a setting improves the installation flexibility and error tolerance of the connecting member 20, makes it easier for the limiting rod 30 to fall into any one of the limiting holes 223, and thus ensures the firmness of the connection.

[0055] For another example, when two second through-holes 104 are provided, in order to match these two through-holes and achieve an accurate limiting function, a plurality of limiting holes 223 can be designed and appear in pairs. The positions of each pair of limiting holes 223 are exactly opposite to the positions of the two second through-holes 104. In this case, the number of limiting posts is also correspondingly set to two. When the two limiting posts rotate the connecting member 20 to an appropriate position, they will respectively fall into each pair of limiting holes 223. Such a design not only improves the stability of the connection, but also ensures that the limiting posts can be evenly distributed when stressed, avoiding damage or loosening that may be caused by single-point stress. Through the paired limiting holes 223 and the matching limiting posts, the accurate control of the rotation angle of the connecting member 20 is achieved, and the stability and reliability of the overall structure are improved, so that the locking mechanism 100 maintains a tight connection with the external component, preventing loosening or detachment.

[0056] For the locking mechanism 100 according to some embodiments of the present invention, the rod body 21 includes a threaded section 211, and the threaded section 211 is located on the side of the connection base 10 provided with the second side surface 102 for threaded connection with an external component.

[0057] Specifically, when it is necessary to connect the locking mechanism 100 with an external component, only the threaded section 211 of the rod body 21 needs to be aligned with the corresponding threaded hole on the external component, and then the rod body 21 is rotated to achieve a tight threaded connection. When the rod body 21 rotates to reach the preset tightening torque, the limiting hole 223 is exactly aligned with the second through-hole 104, forming a channel. At this time, the limiting rod 30 can fall into the limiting hole 223 through the second through-hole 104. After the limiting rod 30 falls into the limiting hole 223, its end will be restricted by the limiting hole 223, thereby restricting the excessive rotation of the connecting member 20 around the axis L of the first through-hole 103. In this way, even when the vehicle encounters vibration or external force during use, the connection between the locking mechanism 100 and the external component can be maintained firmly, effectively preventing loosening and rotational detachment. At the same time, it can also avoid problems such as torque attenuation, material fatigue or stress relaxation caused by over-tightening of the bolt.

[0058] In some embodiments, as Figure 3 shown, the rod body 21 further includes: a connecting section 212. The connecting section 212 is located on the side of the connection base 10 provided with the first side surface 101, and the connecting section 212 connects the limiting portion 22.

[0059] The connecting section 212 is not only closely connected to the limiting portion 22, ensuring the integrity of the structure. Through such a design, the connecting section 212 not only transmits the necessary force and torque, but also ensures that the limiting portion 22 can stably perform its function, providing a solid guarantee for the reliability and stability of the entire locking mechanism 100.

[0060] AsFigure 3 As shown, the rod body 21 further includes: an assembly section 213. The assembly section 213 is located at the end of the rod body 21 away from the threaded section 211, and the assembly section 213 is a non-rotary body.

[0061] The assembly section 213 is used to connect to the output end of the driving device. Through such a connection method, the driving device can effectively transmit torque and force to the rod body 21, thereby realizing the rotational tightening of the connecting member 20 in the locking mechanism 100.

[0062] The assembly section 213 is a non-rotary body. With such a setting, the tight fit between the assembly section 213 and the output end of the driving device can be improved, ensuring the transmission of torque and force.

[0063] In the locking mechanism 100 according to some embodiments of the present invention, the assembly section 213 is hexagonal to be adapted to an electric wrench, or the outer peripheral surface of the assembly section 213 is provided with circumferentially distributed tooth grooves 2131.

[0064] Since the hexagonal socket of the electric wrench can be tightly sleeved on the hexagonal assembly section 213, this design ensures that the locking mechanism 100 can be quickly connected to the electric wrench, and the connection is firm and reliable. At the same time, the hexagonal structure provides a good force transmission path, reducing torque loss caused by connection looseness or slipping.

[0065] Alternatively, a series of circumferentially uniformly distributed tooth grooves 2131 are machined on the outer peripheral surface of the assembly section 213, and these tooth grooves 2131 are engaged with the gear or rack at the output end of the driving device. This design allows the locking mechanism 100 to be precisely connected to the driving device with a gear or rack output end, and transmits torque and force through the engagement of the tooth grooves 2131 with the gear (or rack).

[0066] Optionally, as Figure 2 shown, the assembly section 213 is configured in a spline shape. Since the spline has a plurality of uniformly distributed protrusions and grooves, it can be tightly fitted with a corresponding spline groove. Such a design not only increases the contact area between the assembly section 213 and the output end of the driving device, improves the firmness of the connection, but also effectively prevents relative rotation, ensuring that the transmitted torque and force are more reliable.

[0067] In the locking mechanism 100 according to some embodiments of the present invention, the limiting portion 22 and the rod body 21 are integrally formed.

[0068] First of all, since the limiting portion 22 and the rod body 21 are integrally formed without additional connecting components or seams, the structural strength of the entire connecting member 20 is significantly improved. This design makes the locking mechanism 100 more stable when bearing external forces and is not easily deformed or damaged.

[0069] Secondly, the one-piece molded part can ensure the precise alignment and fit between the limiting portion 22 and the rod body 21, avoiding the performance degradation caused by assembly errors and ensuring its stability and reliability during operation.

[0070] In addition, compared with the traditional method of manufacturing separate parts and then assembling them, one-piece molding simplifies the manufacturing process and reduces production costs. At the same time, it also reduces quality problems caused by improper assembly and improves production efficiency.

[0071] According to the locking mechanism 100 of some embodiments of the present invention, the limiting portion 22 is annular and is arranged around the rod body 21. The limiting portion 22 has a first assembly surface 221 in contact with the first side surface 101 and a second assembly surface 222 opposite to the first assembly surface 221. The distance between the second assembly surface 222 and the first assembly surface 221 gradually decreases from the center to the periphery.

[0072] Since the limiting portion 22 is annular and disposed around the rod body 21 , it can support the rod body 21 in multiple directions, thereby effectively preventing the rod body 21 from deflecting or deforming when subjected to force.

[0073] The first assembly surface 221 is in contact with the first side surface 101. This contact mode can shorten the path of the limiting rod 30 entering the limiting hole 223, which means that during the operation of the locking mechanism 100, the limiting rod 30 can enter the limiting hole 223 more quickly and directly. This not only improves the positioning efficiency of the limiting rod 30, making the response of the locking mechanism 100 faster, but also greatly reduces the situation of inaccurate positioning caused by the skewness of the limiting rod 30. Through such a design, the overall performance and reliability of the locking mechanism 100 are improved.

[0074] In addition, the design that the distance between the second assembly surface 222 and the first assembly surface 221 gradually decreases from the center to the periphery can correspondingly reduce the space occupied by the limiting portion 22, making the limiting portion 22 more compact and reasonable.

[0075] According to the locking mechanism 100 of some embodiments of the present invention, there are at least two second through holes 104, and the plurality of second through holes 104 are arranged circumferentially with the first through hole 103 as the center. There are at least two limiting rods 30, which are correspondingly inserted into the second through holes 104, and there are at least two limiting holes 223, each of which corresponds to one second through hole 104.

[0076] The second through holes 104 are formed in a circumferential layout centered on the first through hole 103. The number of the limiting rods 30 matches the number of the second through holes 104, and each limiting rod 30 passes through one of the second through holes 104 to form a movable locking element. Meanwhile, at least one limiting hole 223 is provided at the position of the limiting part 22 corresponding to each second through hole 104 so as to receive and fix the limiting rod 30 when needed.

[0077] When the connecting member 20 rotates to an appropriate angle or position, the limiting holes 223 thereon will be aligned with the second through holes 104 and the limiting rods 30. At this time, under the action of an external operation or its own gravity, the limiting rods 30 will naturally fall into the corresponding limiting holes 223, realizing the limitation between the connecting member 20 and the connecting seat 10. The combination of the paired limiting holes 223 and the limiting columns not only enhances the stability of the connection, but also ensures the uniform distribution of the force at multiple points, effectively avoiding the damage risk that may be brought by single-point stress.

[0078] In some embodiments as Figures 1 - 4 shown, there are two second through holes 104, and the two second through holes 104 are arranged symmetrically with respect to the center point of the first through hole 103. There are two limiting rods 30, which respectively pass through the second through holes 104 in a one-to-one correspondence, and there are two limiting holes 223, and each limiting hole 223 is arranged corresponding to one second through hole 104.

[0079] Through the symmetrical layout of the second through holes 104, it can be ensured that the connecting member 20 is uniformly stressed during the positioning process, improving the stability and durability of the locking mechanism 100.

[0080] Meanwhile, since both the second through holes 104 and the limiting holes 223 adopt a point-symmetrical distribution, this design enables the connecting member 20 to have flexibility and a tolerance rate during rotation. When the limiting rod 30 fails to accurately fall into the first limiting hole 223 for some reason, it is not necessary to rotate the entire connecting member 20 for a full circle for adjustment, but only need to rotate it half a circle to align the limiting rod 30 with the next limiting hole 223. In this way, the tightening degree can be accurately controlled to ensure that the pre-tightening force reaches the design requirements, neither too large nor too small, so as to maintain the stability and reliability of the connection.

[0081] In addition, the point-symmetrical layout can also prevent the connecting member 20 from being over-tightened. When the connecting member 20 is over-tightened, it may cause material stress concentration, deformation or even fracture, and at the same time, it will increase the difficulty of disassembly and the damage risk. The design of rotating half a circle effectively avoids this problem. Even if a limiting hole 223 is missed, it is only necessary to tighten the connecting member 20 to the position of the next limiting hole 223, and the pre-tightening force will not be increased infinitely, thus ensuring the safety and service life of the connecting member 20.

[0082] The locking mechanism 100 according to some embodiments of the present utility model, as Figure 4 shown, the limiting hole 223 is a blind hole, the axial length of the second through hole 104 is L1, the axial length of the limiting hole 223 is L2, and the length of the limiting rod 30 is L3, satisfying: L3 > L1 + L2.

[0083] The limiting hole 223 is configured as a blind hole, which means it does not penetrate the entire limiting part 22 but has a closed bottom. As a blind hole, the axial length L2 of the limiting hole 223 limits the depth to which the cooperating limiting rod 30 can penetrate. When the limiting rod 30 enters the limiting hole 223, it cannot continue to penetrate more than the length of L2, thus achieving the position limitation of the limiting rod 30.

[0084] The second through hole 104 is a through hole for passing through the limiting rod 30. The axial length L1 of the second through hole 104 determines the maximum distance that the limiting rod 30 can move within the hole.

[0085] The length of the limiting rod 30 is L3, which must be greater than the sum of L1 and L2. This setting ensures that when the limiting rod 30 passes through the second through hole 104 and enters the limiting hole 223, there is still enough length remaining outside the second through hole 104, so that it can be more easily coordinated with other mechanisms to realize the movement of the limiting rod 30, and further realize the locking or unlocking function of the locking mechanism 100.

[0086] The battery pack according to the second aspect embodiment of the present utility model, the housing of the battery pack is provided with the locking mechanism 100 according to the first aspect embodiment of the present utility model; wherein, the connecting seat 10 of the locking mechanism 100 is fixedly connected to the housing, or a part of the housing constitutes the connecting seat 10.

[0087] Optionally, the connecting seat 10 is fixedly connected to the housing. At this time, the connecting seat 10 and other parts of the housing can be formed after two processing procedures. This connection method is simple and direct, facilitating installation and disassembly.

[0088] Of course, the present utility model is not limited thereto, and the connecting seat 10 can also be made into a part of the housing. Then the connecting seat 10 and other parts of the housing can be formed in one processing. This integrally formed part can well withstand the forces and torques generated during the locking and unlocking processes.

[0089] By providing the locking mechanism 100 according to the first aspect embodiment of the present utility model, not only can the detachable of the battery pack be realized, but also the reliability of the battery pack during the connection process and the stability during the use process are ensured.

[0090] The vehicle according to the third aspect embodiment of the present utility model includes: a vehicle body and a battery pack. The battery pack is the battery pack according to the second aspect of the present utility model, and the battery pack is detachably connected to the vehicle body through the locking mechanism 100.

[0091] The detachable connection between the battery pack and the vehicle body is realized through the locking mechanism 100. This not only endows the battery pack with flexible replacement capabilities but also ensures a high level of stability during the connection process. The multi-point limiting mechanism of the locking mechanism 100 effectively prevents the battery pack from shaking and loosening during driving. Even in the face of complex road conditions and severe vibrations, a stable connection state can be maintained. Meanwhile, in the locking mechanism 100, the circumferential limiting function performed by the limiting rod 30 plays a certain balancing role. It subtly regulates the torque borne by the connecting member 20 to ensure it is within an appropriate range, neither too tight nor too loose. This design effectively avoids the torque attenuation phenomenon caused by over-tightening, reduces the risk of fatigue failure of the material due to long-term exposure to excessive stress, and also suppresses the possibility of stress relaxation, thereby ensuring the long-term stability and reliability of the locking mechanism 100 and even the entire battery pack connection system.

[0092] Therefore, this vehicle not only improves the maintainability and interchangeability of the battery pack but also greatly enhances the overall stability and safety of the connection between the battery pack and the vehicle body.

[0093] The following refers to Figure 1 - Figure 4 A specific embodiment is used to describe in detail the locking mechanism 100 according to the embodiments of the present invention. It should be understood that the following description is only an exemplary illustration and not a specific limitation of the invention.

[0094] Referring to Figure 1 , the locking mechanism 100 includes: a connection seat 10, a connecting member 20, and a limiting rod 30.

[0095] The connection seat 10 has opposite first side 101 and second side 102. The connection seat 10 is provided with a first through hole 103 and a second through hole 104 that penetrate from the first side 101 to the second side 102.

[0096] There are two second through holes 104, and the two second through holes 104 are symmetrically arranged with the first through hole 103 as the center point.

[0097] The connecting member 20 includes: a rod body 21 and a limiting portion 22 connecting the rod body 21.

[0098] The limiting portion 22 is located on the side of the connection seat 10 provided with the first side 101, and the rod body 21 passes through the first through hole 103 to connect to an external component.

[0099] Referring to Figure 3 , the rod body 21 includes: a threaded section 211, a connection section 212, and an assembly section 213.

[0100] The threaded section 211 is located on the side of the connecting seat 10 where the second side surface 102 is provided, and is used for threaded connection with an external component.

[0101] The connecting section 212 is located on the side of the connecting seat 10 where the first side surface 101 is provided, and the connecting section 212 connects the limiting portion 22.

[0102] Refer to Figure 2 - Figure 3 , The assembling section 213 is located at the end of the rod body 21 away from the threaded section 211, and the assembling section 213 is a non-rotary body. The outer peripheral surface of the assembling section 213 is provided with circumferentially distributed tooth grooves 2131.

[0103] The limiting portion 22 is annular and is arranged around the rod body 21, and the limiting portion 22 and the rod body 21 are integrally formed.

[0104] Refer to Figure 3 , The limiting portion 22 includes a first assembling surface 221 and a second assembling surface 222. The first assembling surface 221 is in contact with the first side surface 101, the second assembling surface 222 is opposite to the first assembling surface 221, and the distance between the second assembling surface 222 and the first assembling surface 221 gradually decreases in the direction from the center to the outer periphery.

[0105] A limiting hole 223 is provided on the limiting portion 22 opposite to the second through hole 104. The limiting hole 223 is located on the first assembling surface 221.

[0106] Refer to Figure 1 - Figure 4 , There are two limiting rods 30, which are respectively inserted into the two second through holes 104, and the ends are fitted in the limiting holes 223 to limit the rotation of the connecting member 20 around the axis L of the first through hole 103.

[0107] Refer to Figure 4 , The limiting hole 223 is a blind hole, the axial length of the second through hole 104 is L1, the axial length of the limiting hole 223 is L2, and the length of the limiting rod 30 is L3, satisfying: L3 > L1 + L2.

[0108] Other components of the locking mechanism 100 according to the embodiments of the present invention, such as the battery pack and the vehicle, etc., and the operations are known to those of ordinary skill in the art, and will not be described in detail here.

[0109] In the description of this specification, the descriptions referring to the terms "embodiment", "example", etc. mean that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in a suitable manner in any one or more embodiments or examples.

[0110] Although embodiments of the present utility model have been shown and described, those of ordinary skill in the art can understand that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principles and spirit of the present utility model. The scope of the present utility model is defined by the claims and their equivalents.

Claims

1. A locking mechanism, characterized in that: include: A connecting seat, the connecting seat having a first side surface and a second side surface opposite to each other, and the connecting seat is provided with a first through hole and a second through hole penetrating from the first side surface to the second side surface; A connecting member, comprising a rod body and a limiting portion connected to the rod body, the limiting portion being located on a side of the connecting seat provided with the first side surface, the rod body being passed through the first through hole to connect to an external member, and the limiting portion being provided with a limiting hole facing the second through hole; A limiting rod is passed through the second through hole, and an end portion thereof is engaged in the limiting hole to limit the connection member from rotating around the axis of the first through hole.

2. The locking mechanism according to claim 1, characterized in that: The rod body comprises a threaded section, and the threaded section is located at a side of the connecting seat where the second side surface is provided, and is used for being threadedly connected with the outer component.

3. The locking mechanism according to claim 2, characterized in that: The rod body also includes: a connecting section, the connecting section being located at a side of the connecting seat provided with the first side surface, the connecting section being connected to the limiting portion; An assembly section is located at the end of the rod body away from the threaded section, and the assembly section is a non-rotating body.

4. The locking mechanism according to claim 3, characterized in that: The assembly section is hexagonal to match the electric wrench, or the outer peripheral surface of the assembly section is provided with tooth grooves distributed along the circumferential direction.

5. The locking mechanism according to claim 1, characterized in that: The limiting portion and the rod body are integrally formed.

6. The locking mechanism according to claim 1, characterized in that: The limiting portion is in a circular shape and is arranged around the rod body. The limiting portion has a first assembly surface in contact with the first side surface and a second assembly surface opposite to the first assembly surface. The distance between the second assembly surface and the first assembly surface gradually decreases from the center to the periphery.

7. The locking mechanism according to claim 1, characterized in that: There are at least two second through holes, and the plurality of second through holes are arranged circumferentially with the first through hole as the center; There are at least two limit rods, which are correspondingly inserted into the second through holes. There are at least two limiting holes, and each limiting hole is arranged corresponding to one second through hole.

8. The locking mechanism according to any one of claims 1 to 7, characterized in that: The limiting hole is a blind hole, the axial length of the second through hole is L1, the axial length of the limiting hole is L2, and the length of the limiting rod is L3, which satisfies: L3>L1+L2.

9. A battery pack, characterized in that: The battery pack housing is provided with a locking mechanism according to any one of claims 1 to 8; Wherein, the connection seat of the locking mechanism is fixedly connected to the shell, or a part of the shell constitutes the connection seat.

10. A vehicle, characterized in that: include: Vehicle body; A battery pack, wherein the battery pack is the battery pack according to claim 9, and the battery pack is detachably connected to the vehicle body through the locking mechanism.

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