Locking mechanism, power battery box assembly and vehicle

Abstract

The application relates to the technical field of locking structures, in particular to a locking mechanism, a power battery box assembly and a vehicle. The locking mechanism comprises a fixed part, a first rotating part, a first rotating shaft, a second rotating part, a second rotating shaft, a pressing part and a third rotating shaft. The track of the sliding guide part is arc-shaped. The first rotating part is rotationally connected with the fixed part through the first rotating shaft. The projection of the first rotating shaft along the axial direction is located on the track of the sliding guide part. The second rotating shaft moves along the arc-shaped track of the sliding guide part. The axis of the first rotating shaft and the axis of the second rotating shaft have two states of coincidence and dislocation. The radius of the arc-shaped track of the sliding guide part is smaller than the distance between the first rotating shaft and the third rotating shaft. The power battery box assembly comprises the locking mechanism, a bottom bracket, a mounting frame and a battery box. The vehicle comprises the power battery box assembly. The application can solve the problem that the locking mechanism is prone to be stuck when being locked and unlocked.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of locking structures, in particular to a locking mechanism, a power battery box assembly and a vehicle. BACKGROUND

[0002] In the field of new energy vehicles, the power battery box assembly is a key carrier for ensuring power storage and output, mainly composed of a battery box, a mounting frame, a bottom bracket and a locking mechanism, and bears the functions of fixing, protecting and adapting to working conditions of the power battery. Among them, the battery box is installed in the mounting frame; the locking mechanism, as a core fastening component, is usually composed of a driving part and a locking tongue, which presses the mounting frame on the bottom bracket through the locking tongue to ensure the reliability of the power battery box assembly on the vehicle.

[0003] However, under the conditions of driving on bumpy roads, sudden acceleration or deceleration, and other severe vibrations, the locking tongue of the existing locking mechanism is easily affected by continuous vibration impact, causing deformation and resulting in the problem of locking and unlocking jam. SUMMARY

[0004] To solve the problem of locking and unlocking jam of the locking mechanism, the present application provides a locking mechanism, a power battery box assembly and a vehicle.

[0005] In a first aspect, the present application provides a locking mechanism comprising:

[0006] A fixed part, wherein the fixed part has a sliding guide part; the trajectory of the sliding guide part is arc-shaped;

[0007] A first rotating part;

[0008] A first rotating shaft, wherein the first rotating part and the fixed part are rotationally connected through the first rotating shaft; the projection of the first rotating shaft along its axial direction is located on the trajectory of the sliding guide part;

[0009] A second rotating part;

[0010] A second rotating shaft, wherein the second rotating part is rotationally connected to the fixed part through the second rotating shaft; the second rotating shaft is movably connected to the fixed part through the sliding guide part; the second rotating shaft moves along the arc-shaped trajectory of the sliding guide part; the axis of the first rotating shaft and the axis of the second rotating shaft have two states of coincidence and misalignment;

[0011] A pressing part, wherein the pressing part is connected to the first rotating part or the second rotating part;

[0012] A third rotating shaft, the first rotating part and the second rotating part are connected by the third rotating shaft; the first rotating shaft is parallel to the third rotating shaft and has a spacing; the second rotating shaft is parallel to the third rotating shaft and has a spacing; the pressing part is located on the side of the first rotating part or the second rotating part close to the third rotating shaft; the inner concave side of the arc track of the sliding guide part is arranged towards the third rotating shaft; the radius of the arc track of the sliding guide part is smaller than the spacing between the first rotating shaft and the third rotating shaft.

[0013] In some embodiments, a reference plane is perpendicular to the axis of the first rotating shaft; in the projection of the reference plane, when the axis of the first rotating shaft and the axis of the second rotating shaft are misaligned, the line connecting the second rotating shaft and the first rotating shaft is a moment line, and the angle between the tangent line of the arc track of the sliding guide part at the position of the second rotating shaft and the moment line is smaller than the self-locking angle.

[0014] In some embodiments, the second rotating shaft is arranged to roll in the sliding guide part.

[0015] In some embodiments, an axle hole is formed on the second rotating part; the second rotating shaft is arranged to rotate in the axle hole; a lubricating member is embedded on the second rotating shaft; and the lubricating member abuts against the inner circumferential surface of the axle hole.

[0016] In some embodiments, two first rotating parts are arranged oppositely; two second rotating parts are arranged oppositely; the two first rotating parts are arranged symmetrically about a center plane; the two second rotating parts are arranged symmetrically about the center plane; and the center plane is perpendicular to the first rotating shaft.

[0017] In some embodiments, the two second rotating parts are located between the two first rotating parts; the two second rotating parts are connected to the same second rotating shaft; and the sliding guide part is located between the two second rotating parts.

[0018] In some embodiments, the locking mechanism further comprises a driving part; and the driving part is used to drive the second rotating part to rotate.

[0019] In some embodiments, the driving part comprises a sliding driving member and a fourth rotating shaft; and the piston rod of the sliding driving member is connected to the second rotating part through the fourth rotating shaft.

[0020] In a second aspect, the application provides a power battery box assembly, which comprises:

[0021] The locking mechanism according to any one of the embodiments of the first aspect;

[0022] A bottom bracket, the fixing part of the locking mechanism is fixedly connected to the bottom bracket.

[0023] The mounting frame is in abutment with the bottom bracket; when the locking mechanism is in the locked state, the pressing part of the locking mechanism abuts the mounting frame on the bottom bracket;

[0024] The battery box is fixed in the mounting frame.

[0025] In some embodiments, the locking mechanism is distributed on the bottom bracket.

[0026] In a third aspect, the application provides a vehicle comprising the power battery box assembly of any one of the embodiments of the second aspect.

[0027] To solve the problem that the locking mechanism is easily unlocked under vibration conditions, the application has the following advantages:

[0028] 1. When the axis of the first rotating shaft coincides with the axis of the second rotating shaft, the first rotating part and the second rotating part are controlled to rotate synchronously around the first rotating shaft, driving the pressing part to oscillate rapidly around the first rotating shaft. This stage is the rapid oscillation stage of the locking mechanism. When the pressing part abuts the object, the second rotating part continues to rotate to make the second rotating shaft move along the arc-shaped track of the sliding guide part, driving the pressing part to oscillate slowly around the first rotating shaft. This stage is the slow pressurization stage of the locking mechanism. In the slow pressurization stage, the movement distance of the second rotating part along the arc-shaped track of the sliding guide part is longer than that of the pressing part, so according to the law of conservation of energy, the force controlling the movement of the second rotating part is smaller than the force of the pressing part pressing the object, thereby realizing force amplification and achieving stable pressing effect. Since the pressing part is jointly limited by the first rotating part and the second rotating part, the impact force borne by the pressing part is jointly borne by the first rotating part, the second rotating part and the fixed part, so that the locking mechanism is not prone to deformation, solving the problem that the locking mechanism is easily stuck.

[0029] 2. By making the angle between the tangent of the arc-shaped track of the sliding guide part at the position of the second rotating shaft and the moment line smaller than the self-locking angle, the self-locking effect of the locking mechanism can be realized, further improving the stable pressing effect.

[0030] 3. By rolling the second rotating shaft in the sliding guide part, when it is necessary to unlock the locking mechanism, the movement of the second rotating part is controlled to make the second rotating shaft roll in the sliding guide part, which can change the sliding friction into rolling friction, reduce the friction force, and facilitate locking and unlocking. BRIEF DESCRIPTION OF DRAWINGS

[0031] Figure 1 FIG. 1 shows a structural schematic diagram of the locking mechanism of embodiment one;

[0032] Figure 2 FIG. 2 shows a structural schematic diagram of the locking mechanism of embodiment two; Figure 1structure diagram of another perspective of the locking mechanism in the first embodiment;

[0033] Figure 3 a structure diagram of the locking mechanism in the first embodiment is shown; Figure 1 a structure diagram of the locking mechanism in the first embodiment is shown;

[0034] Figure 4 a structure diagram of the locking mechanism in the first embodiment is shown;

[0035] Figure 5 a structure diagram of the locking mechanism in the first embodiment is shown; Figure 1 a structure diagram of the locking mechanism in the first embodiment is shown;

[0036] Figure 6 a structure diagram of the locking mechanism in the first embodiment is shown; Figure 5 a structure diagram of the locking mechanism in the first embodiment is shown;

[0037] Figure 7 a structure diagram of the locking mechanism in the first embodiment is shown; Figure 5 a structure diagram of the locking mechanism in the first embodiment is shown;

[0038] Figure 8 a structure diagram of the locking mechanism in the first embodiment is shown; Figure 5 a structure diagram of the locking mechanism in the first embodiment is shown;

[0039] Figure 9 a structure diagram of the locking mechanism in the first embodiment is shown;

[0040] Figure 10 a structure diagram of the locking mechanism in the first embodiment is shown;

[0041] Figure 11 a structure diagram of the locking mechanism in the first embodiment is shown;

[0042] Figure 12 a structure diagram of the locking mechanism in the first embodiment is shown;

[0043] Figure 13 a structure diagram of the locking mechanism in the first embodiment is shown;

[0044] Figure 14 a structure diagram of the locking mechanism in the first embodiment is shown.

[0045] Reference signs:

[0046] 10, locking mechanism; 11, fixed part; 111, sliding guide part; 112, first fixed plate; 113, second fixed plate; 114, third fixed plate; 12, first rotating part; 13, first rotating shaft; 14, second rotating part; 141, shaft hole; 142, first abutting surface; 143, first avoiding groove; 144, second abutting surface; 145, second avoiding groove; 15, second rotating shaft; 151, lubricating member; 16, pressing part; 161, rotating block; 162, pressing plate; 17, third rotating shaft; 18, driving part; 181, sliding driving member; 182, fourth rotating shaft; 19, limiting part; 20, bottom bracket; 30, mounting frame; 40, battery box; 50, guide cover; 51, opening; 52, guide inclined surface. DETAILED DESCRIPTION

[0047] The present disclosure will now be discussed with reference to several example embodiments. It should be appreciated that these embodiments are discussed only to better illustrate the present disclosure and are not intended to limit the scope of the present disclosure in any way.

[0048] As used herein, the terms "comprises," "comprising," "includes," "including," "has," "having," "contains," "containing," or any other variation thereof, are intended to cover a non-exclusive inclusion. For example, a process, method, article, or apparatus that comprises a list of elements is not necessarily limited to only those elements but can include other elements not expressly listed or inherent to such process, method, article, or apparatus. Further, unless expressly stated to the contrary, "or" refers to an inclusive or and not to an exclusive or. For example, a condition A or B is satisfied by any one of the following: A is true (or A can be satisfied); B is true (or B can be satisfied); or both A and B are true (or both A and B can be satisfied). Also, unless expressly stated to the contrary, "comprising" or "comprises" does not exclude the presence of elements or materials other than those listed in a process, method, article, or apparatus that "comprises" or "comprising" the listed elements or materials. "Comprising" or "comprises" can mean "including" or "includes" but does not exclude other elements or materials. In addition, the term "coupled" or "coupling" as used herein refers to any direct or indirect communication between or among the elements, software, or portions thereof, whether electrically, mechanically, or otherwise. The term "coupled" or "coupling" does not require the direct connection between the elements, software, or portions thereof. The term "connected" or "connecting" as used herein refers to any connection between or among the elements, software, or portions thereof, whether electrically, mechanically, or otherwise. The term "connected" or "connecting" does not require the direct connection between the elements, software, or portions thereof. The terms "first," "second," "third," "fourth," etc. are used herein to denote different units (e.g., elements, software, or portions thereof), which are not necessarily intended to denote a quantity or order. The terms "front," "back," "left," "right," "rear," "top," "bottom," "side," "under," and the like describe the orientation in the drawings to which they are attached and are not intended to mean or imply that a described structure or element must have a particular orientation, be constructed or operated in a particular orientation, and / or otherwise have functionality dependent on the particular orientation. The terms "front," "back," "left," "right," "rear," "top," "bottom," "side," "under," and the like are used for clarity in only the description of the drawings and are not used to limit any described structures or elements or any attached components. Unless otherwise noted, the term "plurality" means two or more.

[0049] In the case of a vehicle driving on a bumpy road, sudden acceleration or deceleration, or other severe vibration conditions, the existing locking mechanism is easily affected by continuous vibration impact, and is prone to deformation, resulting in unlocking jam.

[0050] To solve the problem of unlocking jam of the locking mechanism, the present application provides a locking mechanism 10, a power battery box assembly and a vehicle.

[0051] Embodiment I:

[0052] With reference to Figure 1 , Figure 2 and Figure 3 , the present application provides a locking mechanism 10. The locking mechanism 10 comprises a fixed part 11, a first rotating part 12, a first rotating shaft 13, a second rotating part 14, a second rotating shaft 15, a pressing part 16 and a third rotating shaft 17.

[0053] Referring to Figure 3 and Figure 4 , the fixed part 11 has a sliding guide part 111, and the sliding guide part 111 has an arc-shaped track. In this embodiment, the sliding guide part 111 is an arc-shaped sliding groove, and the second rotating shaft 15 partially penetrates the sliding groove. The second rotating shaft 15 can slide or roll in the sliding groove. In other embodiments, the sliding guide part 111 can also be an arc-shaped guide rail.

[0054] Referring to Figure 5 and Figure 6 , the first rotating part 12 is rotationally connected to the fixed part 11 through the first rotating shaft 13, and the projection of the first rotating shaft 13 along its own axis is located on the track of the sliding guide part 111. Preferably, in this embodiment, the projection of the first rotating shaft 13 along its own axis is located at the end of the arc-shaped track of the sliding guide part 111, achieving the purpose of structural simplification. The second rotating part 14 is rotationally connected to the fixed part 11 through the second rotating shaft 15, and the second rotating shaft 15 is movably connected to the fixed part 11 through the sliding guide part 111. The second rotating shaft 15 moves along the arc-shaped track of the sliding guide part 111. The axis of the first rotating shaft 13 and the axis of the second rotating shaft 15 have two states of coincidence and misalignment. When the axis of the first rotating shaft 13 coincides with the axis of the second rotating shaft 15, the first rotating part 12 and the second rotating part 14 can synchronously rotate around the first rotating shaft 13.

[0055] Referring to Figure 5 and Figure 6 , the pressing part 16 is connected to the first rotating part 12 or the second rotating part 14. The first rotating part 12 and the second rotating part 14 are rotationally connected through the third rotating shaft 17. The first rotating shaft 13 is parallel to the third rotating shaft 17 and has a spacing, and the second rotating shaft 15 is parallel to the third rotating shaft 17 and has a spacing. The pressing part 16 is located on the side of the first rotating part 12 or the second rotating part 14 close to the third rotating shaft 17. The concave side of the arc-shaped track of the sliding guide part 111 is arranged towards the third rotating shaft 17, and the radius of the arc-shaped track of the sliding guide part 111 is smaller than the spacing between the first rotating shaft 13 and the third rotating shaft 17.

[0056] When the axis of the first rotating shaft 13 coincides with the axis of the second rotating shaft 15, the first rotating part 12 and the second rotating part 14 are controlled to synchronously rotate around the first rotating shaft 13, driving the pressing part 16 to rapidly oscillate around the first rotating shaft 13 until the pressing part 16 abuts against the object to be pressed. This stage is the rapid oscillation stage of the locking mechanism 10.

[0057] Referring to Figure 7 and Figure 8 , Figure 7 , the state of the locking mechanism 10 in Figure 8 is the preliminary pressing state. The locking mechanism 10 is in the preliminary pressing state from Figure 7The shown unlocking device changes to Figure 8 The shown preliminary pressing state is the fast swing stage.

[0058] When the pressing part 16 abuts against the object, the second rotating part 14 continues to be controlled to rotate, so that the second rotating shaft 15 moves along the arc-shaped track of the sliding guide part 111. Since the radius of the arc-shaped track of the sliding guide part 111 is smaller than the distance between the first rotating shaft 13 and the third rotating shaft 17, when the second rotating shaft 15 is out of position with the first rotating shaft 13, the pressing part 16 can continue to swing slowly around the first rotating shaft 13, which is the slow pressing stage of the locking mechanism 10. The direction of rotation of the pressing part 16 around the first rotating shaft 13 in the slow pressing stage is the same as that in the fast swing stage, so that a stepped pressing action can be realized, and the efficiency of pressing or unlocking is improved. In the slow pressing stage, the movement distance of the second rotating part 14 along the arc-shaped track of the sliding guide part 111 is longer than that of the pressing part 16, so that according to the law of conservation of energy, the force for controlling the movement of the second rotating part 14 is smaller than the force for pressing the object by the pressing part 16, thereby realizing force amplification and achieving the effect of stable pressing, so that the locking mechanism 10 is not easy to be unlocked under vibration working conditions. Since the pressing part 16 is jointly limited by the first rotating part 12 and the second rotating part 14, the impact force borne by the pressing part 16 is shared by the first rotating part 12, the second rotating part 14 and the fixed part 11, so that the locking mechanism is not easy to deform, and the problem of easy jamming of the locking mechanism is solved.

[0059] Referring to Figure 5 , Figure 5 The shown final pressing state after the slow pressing of the locking mechanism 10.

[0060] Preferably, in order to improve the contact area of the pressing part 16 and the pressed object and realize further stable pressing, the first rotating part 12, the second rotating part 14 and the pressing part 16 are rotationally connected through the third rotating shaft 17. Therefore, when the pressing part 16 abuts against the pressed object, the pressing part 16 can rotate adaptively by a corresponding angle, so that face contact between the pressing part 16 and the pressed object is realized. It should be understood that in other embodiments, the pressing part 16 is fixedly connected or rotationally connected to the end of the first rotating part 12 close to the third rotating shaft 17. In other embodiments, the pressing part 16 is fixedly connected or rotationally connected to the end of the second rotating part 14 close to the third rotating shaft 17. The pressing part 16 is rotationally connected, so that it can rotate adaptively by a corresponding angle, thereby improving the contact area of the pressing part 16 and the pressed object.

[0061] Referring to Figure 2 and Figure 4In the embodiment, the fixed part 11 comprises a fixed seat, the fixed seat comprises a first fixed plate 112, a second fixed plate 113 and a third fixed plate 114, the first fixed plate 112 has a spacing with the second fixed plate 113; the third fixed plate 114 is fixedly connected with the first fixed plate 112 and the second fixed plate 113 respectively. Preferably, the first fixed plate 112, the second fixed plate 113 and the third fixed plate 114 are integrally formed to guarantee the structural strength. The sliding guide part 111 is arranged on the second fixed plate 113. The first rotating part 12 comprises a first rotating plate, the first rotating plate is rotationally connected with the first fixed plate 112 through a first rotating shaft 13. The second rotating part 14 comprises a second rotating plate, the second rotating plate is rotationally connected with the second fixed plate 113 through a second rotating shaft 15.

[0062] Further, referring to Figure 6 , referring to a reference plane perpendicular to the axis of the first rotating shaft 13; in the projection of the reference plane, in the state that the axis of the first rotating shaft 13 and the axis of the second rotating shaft 15 are dislocated, the line connecting the second rotating shaft 15 and the first rotating shaft 13 is a moment line, the included angle between the tangent line of the arc-shaped track of the sliding guide part 111 at the position of the second rotating shaft 15 and the moment line is a first included angle α, the first included angle α is smaller than the self-locking angle. It should be understood that the size of the self-locking angle is related to the friction coefficient of the contact surface of the sliding guide part 111 and the second rotating shaft 15.

[0063] Further, referring to Figure 6 Since the second rotating shaft 15 is only subjected to the constraint action of the sliding guide part 111, when the second rotating part 14 is subjected to an external force, the second rotating shaft 15 moves, and the second rotating shaft 15 is subjected to the frictional force applied by the sliding guide part 111, thereby forming a rotational moment on the second rotating shaft 15, which can make the second rotating shaft 15 have a relative rotation trend. Therefore, preferably, the second rotating shaft 15 is arranged to roll in the sliding guide part 111 in the embodiment, so that the friction loss when the locking mechanism 10 is controlled to act can be reduced, and the locking and unlocking operations are facilitated.

[0064] Further, referring to Figure 3 and Figure 9 , an axle hole 141 is formed on the second rotating part 14, and the second rotating shaft 15 is rotationally arranged in the axle hole 141; a lubricating part 151 is embedded on the second rotating shaft 15, and the lubricating part 151 abuts against the inner circumferential surface of the axle hole 141. Preferably, the lubricating part 151 can be a graphite column. Through the lubricating part 151, the frictional force of the second rotating shaft 15 rotating in the axle hole 141 can be reduced, so as to further reduce the friction loss and achieve the purpose of facilitating the locking and unlocking operations.

[0065] Further, referring to Figure 2The first rotating part 12 is oppositely provided with two, and the second rotating part 14 is oppositely provided with two. The two first rotating parts 12 are symmetrically arranged about a center plane, and the two second rotating parts 14 are symmetrically arranged about the center plane. The center plane is perpendicular to the first rotating shaft 13. That is, the first rotating plate is oppositely provided with two, and the second rotating plate is oppositely provided with two. The two first rotating plates are symmetrically arranged about a center plane, and the two second rotating plates are symmetrically arranged about the center plane. In this way, the symmetry and the action stability of the whole structure can be improved.

[0066] Further, referring to Figure 2 and Figure 3 , the two second rotating parts 14 are located between the two first rotating parts 12; the two second rotating parts 14 are rotationally connected with the same second rotating shaft 15; and the sliding guide part 111 is located between the two second rotating parts 14. In this way, the length of the second rotating shaft 15 can be shortened, so as to avoid the force biasing on the second rotating shaft 15 during the control of the rotation of the second rotating part 14, thereby avoiding the jamming. Preferably, the projection of the second rotating shaft 15 along its axis is located on the first rotating part 12, and the end surface of the second rotating shaft 15 is attached to the first rotating part 12, so that the first rotating part 12 plays a protective role for the second rotating shaft 15.

[0067] That is, the two second rotating plates are located between the two first rotating plates, the two second rotating plates are rotationally connected with the same second rotating shaft 15, and the sliding guide part 111 is located between the two second rotating plates 14. The projection of the second rotating shaft 15 along its axis is located on the first rotating plate 12, and the end surface of the second rotating shaft 15 is attached to the first rotating plate 12, so that the first rotating plate 12 plays a protective role for the second rotating shaft 15.

[0068] Further, referring to Figure 10 , the locking mechanism 10 further comprises a driving part 18; the driving part 18 is used for driving the second rotating part 14 to rotate.

[0069] Further, referring to Figure 10The driving part 18 comprises a sliding driving element 181 and a fourth rotating shaft 182. The sliding driving element 181 comprises a cylinder. The piston rod of the sliding driving element 181 is rotationally connected to the second rotating part 14 through the fourth rotating shaft 182. In this embodiment, the fourth rotating shaft 182 is rotationally connected to two second rotating parts 14. Thus, the force of the cylinder on the fourth rotating shaft 182 is between the two second rotating parts 14, so that the second rotating shaft 15 is not easily subjected to the force biasing phenomenon of the second rotating part 14, thereby ensuring the stability of the locking mechanism 10. When the vehicle is on a bumpy road, the locking mechanism 10 is subjected to a large vibration, and the vibration force is transmitted to the first rotating part 12 and the second rotating part 14 by the pressing part 16, and then further transmitted to the fixed part 11, thereby avoiding that the sliding driving element 181 directly bears the torque, improving the protection degree of the piston rod of the sliding driving element 181, and avoiding the unlocking jam caused by the bending of the piston rod.

[0070] It should be understood that the driving part 18 can also be driven in other ways. For example, in other embodiments, the driving part 18 comprises a first driving element and a second driving element. The first driving element drives the first rotating part 12 to rotate around the first rotating shaft 13. The second driving part 18 is used to push or pull the second rotating part 14 to move, so as to realize the separation of the axis of the first rotating shaft 13 and the axis of the second rotating shaft 15.

[0071] Embodiment two:

[0072] With reference to Figure 11 The locking mechanism 10 provided in the present application is different from the embodiment one in that the second rotating part 14 has a first abutting surface 142, the first abutting surface 142 is in sliding abutment with the fixed part 11, the first abutting surface 142 is provided with a first avoiding groove 143, and the projection area of the fixed part 11 on the first abutting surface 142 covers part of the first avoiding groove 143. The second rotating part 14 is rotationally connected to the fixed part 11 through the second rotating shaft 15, and the second rotating shaft 15 is movably connected to the fixed part 11. The second rotating shaft 15 moves along the arc-shaped track of the sliding guide part 111, and the axis of the second rotating shaft 15 is perpendicular to the first abutting surface 142. Since the arc-shaped track of the sliding guide part 111 is relatively long, the abutting area of the first abutting surface 142 and the fixed part 11 is relatively large, and the first avoiding groove 143 can reduce the abutting area of the first abutting surface 142 and the fixed part 11, thereby reducing the frictional resistance. In addition, when the first abutting surface 142 and the fixed part 11 are closely abutted, a vacuum suction phenomenon is easily generated, the first abutting surface 142 and the fixed part 11 are sucked together, and the relative rotation between the second rotating part 14 and the fixed part 11 is blocked. By providing the first avoiding groove 143, air can enter between the first abutting surface 142 and the fixed part 11, thereby avoiding the generation of vacuum, and avoiding the jamming of the relative rotation between the second rotating part 14 and the fixed part 11.

[0073] With reference toFigure 11 The second rotating part 14 has a second abutting surface 144, the first abutting surface 142 and the second abutting surface 144 are oppositely arranged, the second abutting surface 144 is in sliding abutment with the first rotating part 12, and the compactness of the locking mechanism 10 can be improved.

[0074] With reference to Figure 6 and Figure 11 During the continuous pressing stage, that is, the process in which the axis of the second rotating shaft 15 gradually separates from the axis of the first rotating shaft 13, the first rotating part 12 and the second rotating part 14 have a relatively small angle of relative rotation, specifically, the second rotating part 14 rotates relative to the first rotating part 12 around the third rotating shaft 17. In order to reduce the frictional resistance between the second abutting surface 144 and the first rotating part 12, the second abutting surface 144 is provided with a second avoiding groove 145, and the projection of the first rotating part 12 on the second abutting surface 144 covers the second avoiding groove 145. The second avoiding groove 145 can reduce the contact area between the second abutting surface 144 and the first rotating part 12, and can also allow air to enter between the first rotating part 12 and the second rotating part 14, thereby avoiding the generation of vacuum suction force between the first rotating part 12 and the second rotating part 14, and the jamming of locking and unlocking, and improving the smoothness of the operation of the locking mechanism 10.

[0075] With reference to Figure 11 The first avoiding groove 143 is provided with a plurality of first avoiding grooves 143, and the second avoiding groove 145 is provided with a plurality of second avoiding grooves 145. The proportion of the total first avoiding grooves 143 to the area of the first abutting surface 142 is a first proportion, the proportion of the total second avoiding grooves 145 to the area of the second abutting surface 144 is a second proportion, and preferably, the first proportion is greater than the second proportion. Since the arc-shaped track of the sliding guide part 111 is relatively long, the abutting area of the first abutting surface 142 and the fixed part 11 is relatively large. In addition, since the second rotating shaft 15 can slide or roll along the arc-shaped track of the sliding guide part 111, the swing amplitude of the second rotating part 14 relative to the fixed part 11 is also greater than the swing amplitude of the first rotating part 12 relative to the fixed part 11. Therefore, the relative movement friction between the second rotating part 14 and the fixed part 11 is the key to the jamming of locking and unlocking of the locking mechanism 10, and the first proportion is set to be greater than the second proportion in the present application, which can more greatly reduce the contact area between the second rotating part 14 and the fixed part 11, thereby reducing the friction. At the same time, the opening area of the second avoiding groove 145 on the second abutting surface 144 is reduced, and the processing complexity is reduced.

[0076] With reference to Figure 11, at least part of the first avoiding grooves 143 are parallel to each other, and at least part of the second avoiding grooves 145 are parallel to each other. Preferably, the distance between two adjacent parallel first avoiding grooves 143 is smaller than the distance between two adjacent parallel second avoiding grooves 145, and the groove width of the first avoiding grooves 143 is larger than the groove width of the second avoiding grooves 145, so that the first ratio is greater than the second ratio.

[0077] With reference to Figure 11 , preferably, the first avoiding grooves 143 are arranged in a mesh shape, and the second avoiding grooves 145 are arranged in a mesh shape. Thus, the air circulation on the first and second fitting surfaces 142 and 144 can be improved, and the locking and unlocking jamming caused by the vacuum suction force between the second rotating part 14 and the fixed part 11 and the first rotating part 12 can be avoided as much as possible.

[0078] With reference to Figure 5 , Figure 6 and Figure 11 , when the second rotating shaft 15 moves away from the first rotating shaft 13 along the arc-shaped track of the sliding guide 111, the direction of rotation of the first rotating part 12 around the first rotating shaft 13 is the first rotation direction, which is counterclockwise or clockwise, depending on the reference angle, i.e. in the angle of view shown in Figure 5 , the first rotation direction is counterclockwise. The compression part 16 includes a rotating block 161 and a compression plate 162; the rotating block 161 and the compression plate 162 are integrally formed; the rotating block 161 is rotatably connected to the second rotating part 14 and the first rotating part 12 through the third rotating shaft 17; the second rotating part 14 or the first rotating part 12 can abut against the compression plate 162 to limit the angle of rotation of the compression plate 162 around the third rotating shaft 17 in the first rotation direction. Thus, according to the actual compression working condition, the surface of the first rotating part 12 or the second rotating part 14 used for abutting against the compression plate 162 is arranged to be parallel to the surface of the object to be compressed, so that the compression part 16 can be in surface contact with the object to be compressed.

[0079] With reference to Figure 7 and Figure 11 , the locking mechanism 10 further comprises a limiting part 19; the limiting part 19 is fixedly connected to the second rotating part 14, and preferably, the limiting part 19 is integrally formed with the second rotating part 14. When the axis of the first rotating shaft 13 coincides with the axis of the second rotating shaft 15, the limiting part 19 is used to abut against the fixed part 11 to limit the angle of rotation of the second rotating part 14 around the first rotating shaft 13 in the second rotation direction. The second rotation direction is opposite to the first rotation direction. That is, in the angle of view shown in Figure 7The second rotation direction in the view shown is clockwise. The state where the first rotation shaft 13 and the fourth rotation shaft 182 are located on the piston rod extension line of the sliding driving member 181 is the stuck critical state. If the second rotating part 14 rotates around the first rotation shaft 13 in the second rotation direction to the stuck critical state or beyond the stuck critical state, the sliding driving member 181 will not be able to drive the second rotating part 14 to rotate in the first rotation direction by pushing the fourth rotation shaft 182, that is, in the state shown in the view, the second rotating part 14 cannot rotate in the counterclockwise direction. Figure 5 The second rotating part 14 cannot rotate in the counterclockwise direction in the view shown. The application limits the rotation angle of the second rotating part 14 through the limiting part 19, which can avoid the locking mechanism 10 reaching the stuck critical state or beyond the stuck critical state, thereby guaranteeing the reliable operation of the locking mechanism 10.

[0080] Embodiment three:

[0081] With reference to Figure 12 , the application provides a power battery box assembly, which comprises the locking mechanism 10, the bottom bracket 20, the mounting frame 30 and the battery box 40 in any one of the embodiments in the first aspect. The fixing part 11 of the locking mechanism 10 is fixedly connected with the bottom bracket 20. The sliding driving member 181 is rotationally connected with the bottom bracket 20. The mounting frame 30 is in abutment with the bottom bracket 20. The locking mechanism 10 is in the locked state. The pressing part 16 of the locking mechanism 10 abuts the mounting frame 30 against the bottom bracket 20. The battery box 40 is fixed in the mounting frame 30.

[0082] Further, with reference to Figure 13 , the locking mechanism 10 is distributed on the bottom bracket 20. More stable locking is achieved.

[0083] In some embodiments, with reference to Figure 14 , the power battery box assembly further comprises a guide cover 50, which is fixedly connected with the bottom bracket 20. The guide cover 50 and the bottom bracket 20 can be fixed by bolts or by welding. The guide cover 50 corresponds to the locking mechanism 10 one by one. The locking mechanism 10 is installed in the guide cover 50. The fixing part 11 is fixedly connected with the guide cover 50, for example, by bolt fixing. The sliding driving member 181 is rotationally connected with the guide cover 50. The guide cover 50 is provided with an opening 51. The pressing part 16 can extend out of the opening 51 to the outside of the guide cover 50. The pressing part 16 can also be retracted into the guide cover 50.

[0084] With reference to Figure 12 and Figure 14 , the top of the guide cover 50 has a guide inclined surface 52. When the mounting frame 30 is placed on the bottom bracket 20, the guide cover 50 can play a guiding role to achieve accurate positioning of the mounting frame 30 and the base bracket.

[0085] Embodiment four:

[0086] The application provides a vehicle comprising the power battery box assembly in embodiment three. In the state that the power battery box assembly is installed on the vehicle, the pressing portion 16 applies a downward pressing force to the installation frame 30, so that the installation frame 30 is in abutment with the upper surface of the bottom bracket 20.

[0087] It can be understood by those skilled in the art that the above-mentioned embodiments are specific cases for realizing the present disclosure, and in actual application, various changes can be made in form and details without departing from the scope of the present disclosure.

Claims

1. A locking mechanism, characterized in that, The locking mechanism includes: A fixing part, wherein the fixing part has a sliding guide part; the trajectory of the sliding guide part is arc-shaped; First rotating part; The first rotating shaft connects the first rotating part and the fixed part; the projection of the first rotating shaft along its own axis lies on the trajectory of the sliding guide part. Second rotating part; The second rotating part is rotatably connected to the fixed part via the second rotating shaft; the second rotating shaft is movably connected to the fixed part via the sliding guide part; the second rotating shaft moves along the arc-shaped trajectory of the sliding guide part; the axis of the first rotating shaft and the axis of the second rotating shaft have two states: coincidence and misalignment. A clamping part, wherein the clamping part is connected to the first rotating part or the second rotating part; The third rotating shaft connects the first rotating part and the second rotating part; the first rotating shaft is parallel to the third rotating shaft and has a gap; the second rotating shaft is parallel to the third rotating shaft and has a gap; the pressing part is located on the side of the first rotating part or the second rotating part closer to the third rotating shaft; the concave side of the arc-shaped trajectory of the sliding guide is set towards the third rotating shaft; the radius of the arc-shaped trajectory of the sliding guide is smaller than the gap between the first rotating shaft and the third rotating shaft.

2. The locking mechanism according to claim 1, characterized in that, The reference plane is perpendicular to the axis of the first rotating shaft; in the projection of the reference plane, when the axes of the first rotating shaft and the second rotating shaft are misaligned, the line connecting the second rotating shaft and the first rotating shaft is a torque line, and the angle between the tangent of the arc trajectory of the sliding guide at the position of the second rotating shaft and the torque line is less than the self-locking angle.

3. The locking mechanism according to claim 1, characterized in that, The second rotating shaft is rolled within the sliding guide portion.

4. A locking mechanism according to claim 3, characterized in that, The second rotating part has a shaft hole; the second rotating shaft is rotatably disposed in the shaft hole; a lubricating element is embedded in the second rotating shaft; the lubricating element abuts against the inner circumferential surface of the shaft hole.

5. A locking mechanism according to claim 1, characterized in that, There are two first rotating parts arranged opposite each other; there are two second rotating parts arranged opposite each other; the two first rotating parts are symmetrically arranged about the central plane; the two second rotating parts are symmetrically arranged about the central plane; the central plane is perpendicular to the first rotating shaft.

6. A locking mechanism according to claim 5, characterized in that, Two second rotating parts are located between two first rotating parts; the two second rotating parts are rotatably connected to the same second rotating shaft; the sliding guide part is located between the two second rotating parts.

7. A locking mechanism according to claim 1, characterized in that, The locking mechanism further includes a driving unit; the driving unit is used to drive the second rotating part to rotate.

8. A locking mechanism according to claim 7, characterized in that, The drive unit includes a sliding drive component and a fourth rotating shaft; the piston rod of the sliding drive component is rotatably connected to the second rotating unit via the fourth rotating shaft.

9. A power battery pack assembly, characterized in that, The power battery pack assembly includes: The locking mechanism according to any one of claims 1-8; The base bracket, wherein the fixing part of the locking mechanism is fixedly connected to the base bracket; The mounting frame abuts against the base bracket; the locking mechanism is in the locked state, and the pressing part of the locking mechanism presses the mounting frame against the base bracket; A battery box, which is fixed in the mounting frame.

10. A power battery pack assembly according to claim 9, characterized in that, The locking mechanism is distributed in multiple parts on the base bracket.

11. A vehicle, characterized in that, The vehicle includes the power battery pack assembly as described in claim 9 or 10.

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