Bolt assembly of locking mechanism, battery pack and vehicle

Abstract

The utility model discloses a bolt assembly of locking mechanism, battery pack and vehicle, the bolt assembly of locking mechanism includes: lock case, lock case including main part and end cover part, the end cover part is connected with main part and defines the installation space together with main part, the end cover part is provided with penetrating hole; the installation part is connected to the other end of the main body part, the bolt penetrates through the penetrating hole to be in threaded fit with the end cover part, and the transmission part is movably installed on the installation part and used for selectively driving the bolt to rotate relative to the end cover part; and the reinforcing structure is connected with the end cover part, and the reinforcing structure is distributed around the penetrating hole. According to the bolt assembly of the locking mechanism, the strength of the end cover portion of the lock shell is enhanced, the deformation resistance or abrasion resistance of the bolt assembly in the fastening process is improved, and installation looseness caused by damage of the bolt assembly is prevented.

Description

TECHNICAL FIELD

[0001] The utility model relates to vehicle technical field especially is involved in a bolt subassembly of locking mechanism, battery pack and vehicle. BACKGROUND

[0002] With the development of new energy electric vehicle technology in our country, the market holding capacity gradually improves, and the user has higher demand to the electric vehicle's endurance mileage and charging time. Restricted by the electric core system and battery characteristics, it is currently impossible to charge in a short time to achieve a larger endurance mileage, especially for the operation vehicles such as network car and taxi, the charging time has higher requirement. When the current battery fast charging technology cannot be further improved, the electric vehicle fast battery replacement can meet the use demand of operation vehicle.

[0003] In the technical scheme that can realize the fast battery replacement at present, the parts of some locking mechanisms are easy to be deformed and damaged in the process of installation, the service life is shorter, and the locking mechanism is easy to loosen, so that the fastening of the battery pack installed on the vehicle body is affected. UTILITY MODEL CONTENTS

[0004] The utility model aims at at least one of the technical problems existing in the prior art. Therefore, one purpose of the utility model is to provide a bolt subassembly of locking mechanism, which enhances the strength of the end cover part of the bolt subassembly, improves the anti-deformation or wear resistance of the bolt subassembly during fastening, and prevents the bolt subassembly from loosening due to damage.

[0005] The bolt subassembly of the locking mechanism according to the utility model embodiment comprises a lock shell, the lock shell comprises a main body part and an end cover part, the end cover part is connected to one end of the main body part and jointly defines an installation space, and the end cover part is provided with a through hole; an installation part, a transmission part and a bolt, the installation part is connected to the other end of the main body part, the bolt is arranged in the through hole to be threadedly connected with the end cover part, and the transmission part is movably arranged on the installation part and used for selectively driving the bolt to rotate relative to the end cover part; and a reinforcing structure, the reinforcing structure is connected with the end cover part, and the reinforcing structure is distributed around the through hole.

[0006] According to the bolt subassembly of the locking mechanism of the utility model embodiment, when the bolt rotates relative to the end cover part, the bolt and the end cover part are in contact, and the bolt has torsion force when rotating, the reinforcing structure arranged at the end cover part can prevent the end cover part of the lock shell from deforming or wearing out and failing when the bolt is twisted, thereby preventing the problem of loosening.

[0007] The bolt assembly of the locking mechanism according to the embodiment of the utility model, the reinforcing structure comprises a first reinforcing piece, the first reinforcing piece is connected to the inner wall of the end cover part, and the outer peripheral wall of the bolt is provided with a limiting portion protruding in the radial direction, the limiting portion is suitable for abutting against the first reinforcing piece when the bolt moves to the maximum position along the through hole.

[0008] The bolt assembly of the locking mechanism according to the embodiment of the utility model, the reinforcing structure further comprises a second reinforcing piece, the second reinforcing piece is connected to the outer side of the end cover part and is distributed in the axial direction opposite to the first reinforcing piece.

[0009] The bolt assembly of the locking mechanism according to the embodiment of the utility model, the thickness T1 of the first reinforcing piece, the thickness T2 of the second reinforcing piece, and T1 >= 1.5mm, T2 >= 1.5mm, and T1 >= T2 are satisfied.

[0010] The bolt assembly of the locking mechanism according to the embodiment of the utility model, the sum of the thicknesses of the first reinforcing piece, the second reinforcing piece and the end cover part is T3, and T3 >= 5mm is satisfied.

[0011] The bolt assembly of the locking mechanism according to the embodiment of the utility model, the reinforcing structure is adhesively connected to the lock shell by structural adhesive or is fixedly connected to the lock shell by a fixing piece.

[0012] The bolt assembly of the locking mechanism according to the embodiment of the utility model, the yield strength of the material selected for the reinforcing structure is sigma s, the hardness is H, and sigma s >= 400mpa and H >= 40hrc are satisfied.

[0013] The bolt assembly of the locking mechanism according to the embodiment of the utility model, one end of the bolt protruding from the lock shell is provided with a maintenance groove.

[0014] The bolt assembly of the locking mechanism according to the embodiment of the utility model, the outer periphery of the transmission piece is provided with an outer gear ring, the mounting piece is provided with a mounting hole, the mounting piece is provided with an inner gear ring at the mounting hole, the transmission piece passes through the mounting hole, and the outer gear ring is meshingly connected with the inner gear ring.

[0015] The utility model embodiment further discloses a battery pack comprising the bolt assembly of the locking mechanism.

[0016] The battery pack has the same advantages as the prior art and the bolt assembly of the locking mechanism, which will not be repeated here.

[0017] The utility model discloses an embodiment further discloses a vehicle comprising a battery pack, a nut assembly and the bolt assembly of the locking mechanism mentioned above, the nut assembly comprises a lock box and a nut, the nut is located in the lock box, the lock box is connected to the vehicle body, the bolt assembly is connected to the battery pack, the bolt assembly is arranged in the nut to fix the battery pack to the vehicle body.

[0018] The bolt assembly of the locking mechanism is connected with the battery pack as a whole, without separately connecting the bolt assembly with the battery pack, so that the number of parts is less, and the installation is simple, and when installing, the strength of the bolt assembly is guaranteed, and damage of the bolt assembly and the nut in the lock box due to excessive torsion during rotation connection can be prevented.

[0019] The additional aspects and advantages of the utility model will be partly given in the following description, some will become obvious from the following description, or be understood through the practice of the utility model. BRIEF DESCRIPTION OF DRAWINGS

[0020] The above and / or additional aspects and advantages of the utility model will become apparent and more readily understood from the following description of the embodiments, taken in conjunction with the accompanying drawings, in which:

[0021] Fig. 1 is the bolt assembly of the locking mechanism of the utility model embodiment's explosion map;

[0022] Fig. 2 is the bolt assembly of the locking mechanism of the utility model embodiment's cross section schematic view of connecting with the nut assembly;

[0023] Fig. 3 is the bolt of the utility model embodiment's structure schematic view of being equipped with maintenance groove.

[0024] REFERENCE NUMERALS:

[0025] Bolt assembly 100,

[0026] Lock shell 1, end cover part 11, main body part 12, bolt 2, screw rod part 21, limiting part 22, connecting part 23, maintenance groove 24,

[0027] Transmission part 3, outer gear ring 31, mounting part 4, inner gear ring 41,

[0028] Reinforcing structure 5, first reinforcing part 51, second reinforcing part 52, elastic part 6, nut 7, lock box 8. DETAILED DESCRIPTION

[0029] The embodiments of the present application are described below in detail, examples of which are shown in the drawings, wherein the same or similar notations represent the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by reference to the drawings are exemplary only, and are used to explain the present application, and cannot be understood as a limitation of the present application.

[0030] The embodiments of the present application are described below in detail, examples of which are shown in the drawings, wherein the same or similar notations represent the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by reference to the drawings are exemplary only, and are used to explain the present application, and cannot be understood as a limitation of the present application. Figs. 1-3 The bolt assembly 100 of the locking mechanism according to the embodiments of the present application is described below, a reinforcing structure 5 is arranged on the end cover part 11, since the bolt 2 is directly contacted and connected with the end cover part 11, the strength of the bolt assembly 100 is enhanced, the anti-deformation or grinding ability of the bolt assembly 100 is improved during the rotating and fastening of the bolt 2, and the installation looseness caused by the damage of the bolt assembly 100 is prevented.

[0031] As shown in Figs. 1-3 The bolt assembly 100 of the locking mechanism according to the embodiments of the present application comprises a lock shell 1, a mounting part 4, a transmission part 3 and a bolt 2.

[0032] The lock shell 1 comprises a main body part 12 and an end cover part 11, the end cover part 11 is connected to one end of the main body part 12 and defines an installation space together, the end cover part 11 is provided with a through hole; the mounting part 4 is connected to the other end of the main body part 12, the bolt 2 is arranged in the through hole to be threadedly connected with the end cover part 11, the transmission part 3 is movably arranged on the mounting part 4 and used to selectively drive the bolt 2 to rotate relative to the end cover part 11; the reinforcing structure 5 is connected with the end cover part 11, and the reinforcing structure 5 is distributed around the through hole.

[0033] In practice, the lock shell 1 is equivalent to a mounting seat, the lock shell 1 is used to be connected with one of the two mounting structures, and then the other mounting structure can be provided with a nut, so that when the bolt assembly 100 is connected with the nut, the two mounting structures can be connected, for example, the lock shell 1 is connected with the battery pack frame, and the lock shell 1 also has the bolt 2 and the transmission part 3, that is, the lock shell 1, the bolt 2 and the transmission part 3 and other structures are connected with the battery pack frame as a whole, when the battery pack frame needs to be installed on the vehicle body, the nut connected with the vehicle body through the bolt assembly 100 can be used.

[0034] In addition, the end cover part 11 is provided with a through hole, the bolt 2 passes through the through hole, and the mounting part 4 is connected to the other end of the main body part 12, that is, the mounting part 4 is opposite to the end cover part 11, an acting force is applied to the transmission part 3 by a tool such as a clamping gun head, so that the transmission part 3 drives the bolt 2 to rotate relative to the end cover part 11, and the bolt 2 and the end cover part 11 have a frictional resistance, the frictional resistance and the torque effect of the rotation of the bolt 2 affect the strength of the end cover part 11, for example, cause the end cover part 11 to be deformed and damaged, have a short service life, at this time, the reliability of the battery pack installation is affected, and the normal use of the vehicle or other dangerous situations are affected.

[0035] The embodiment of the utility model sets the reinforcing structure 5 at the position of the end cover part 11, that is, the reinforcing structure 5 is connected with the end cover part 11, the strength of the end cover part 11 is enhanced, the deformation of the end cover part 11 due to external force can be further reduced, the service life of the lock shell 1 is increased, the service life of the whole bolt assembly 100 is also increased, the bolt assembly 100 does not need to be frequently replaced, and the battery pack loosening problem caused by the influence of the installation reliability of the bolt assembly 100 due to the deformation of the lock shell 1 can be prevented.

[0036] In some embodiments, the reinforcing structure 5 includes a first reinforcing piece 51, the first reinforcing piece 51 is connected to the inner wall of the end cover part 11, and the outer peripheral wall of the bolt 2 is provided with a limiting portion 22 protruding in the radial direction, the limiting portion 22 is suitable for abutting against the first reinforcing piece 51 when the bolt 2 moves to the maximum position along the through hole.

[0037] In practice, the first reinforcing piece 51 is connected to the inner wall of the end cover part 11 and abuts against the first reinforcing piece 51 when the limiting portion 22 moves to the maximum position, the function of the limiting portion 22 is to prevent the bolt 2 from being damaged when being continuously tightened to the maximum extent after being connected with the threaded hole of the vehicle body.

[0038] In addition, the bolt 2 includes a screw rod part 21, a limiting portion 22 and a connecting part 23, the connecting part 23 is provided with spline protrusions distributed around the connecting shaft at intervals, and each spline protrusion extends in the axial direction of the connecting part 23, the transmission member 3 is provided with a connecting blind hole, the inner wall of the connecting blind hole is provided with a plurality of spline grooves matched with the spline protrusions, one end of the connecting part 23 is inserted into the connecting blind hole and the spline grooves are matched with the spline protrusions, so that the transmission member 3 is inserted and matched with the spline of the connecting part 23 of the bolt 2, the rotation matching is realized through the limiting of the two, the torque is effectively transmitted, the connecting part 23 is sleeved with an elastic member 6, one end of the elastic member 6 abuts against the limiting portion 22 and the other end abuts against the transmission member 3; when the bolt assembly 100 needs to be installed, the transmission member 3 is lifted and rotated, at this time, the elastic member 6 is compressed, when the bolt assembly 100 is connected, the transmission member 3 falls to the mounting member 4 under the action of the elasticity of the elastic member 6 and is matched with the mounting member 4, so as to be locked.

[0039] Thus, the limiting portion 22 can press the elastic member 6, and can prevent the bolt 2 from moving further away from the lock shell 1 under the action of an external force, so as to damage the end cover portion 11 of the lock shell 1 or the connection between the bolt 2 and the nut. The first reinforcing member 51 is arranged on the inner wall of the lock shell 1 and is pressed by the limiting portion 22. The first reinforcing member 51 has a ring structure, and the cross-sectional area of the first reinforcing member 51 is equal to the cross-sectional area of the inside of the end cover portion 11 of the lock shell 1. The first reinforcing member 51 can increase the strength of the end cover portion 11, so that the end cover portion 11 is less affected when the limiting portion 22 presses the end cover portion 11.

[0040] In addition, when the battery pack is fixed to the vehicle by the bolt assembly 100, if vibration occurs, the bolt 2 can generate an action force in the axial direction of the bolt assembly 100. The first reinforcing member 51 can increase the strength of the end cover portion 11 of the lock shell 1, and can also prevent the limiting portion 22 of the bolt 2 from having a large effect on the end cover portion 11 due to vibration.

[0041] In some embodiments, the reinforcing structure 5 further comprises a second reinforcing member 52, which is connected to the outside of the end cover portion 11 and is distributed opposite to the first reinforcing member 51 in the axial direction of the bolt 2.

[0042] The end cover portion 11 further comprises a second reinforcing member 52, which is opposite to the first reinforcing member 51 and is connected to the outside of the end cover portion 11. When the outside of the lock shell 1 contacts the position where the vehicle body is fixed, the lock shell 1 can be protected to a certain extent. In addition, the end cover portion 11 is simultaneously reinforced by the first reinforcing member 51 and the second reinforcing member 52, which can prevent the portion of the bolt 2 inside the lock shell 1 from deforming the end cover portion 11 by applying an action force to the end cover portion 11 from the inside, and can also prevent the structure outside the lock shell 1 from deforming the end cover portion 11 by applying an action force to the end cover portion 11 from the outside, so as to further prevent the end cover portion 11 from deforming as a whole. When the end cover portion 11 deforms, the connection performance of the bolt 2 will be affected. That is, when the strength of the end cover portion 11 is ensured, the end cover portion 11 with high strength can better limit the axial and radial directions of the connection between the bolt 2 and the vehicle body, so as to ensure the reliability of the connection of the bolt 2.

[0043] In some embodiments, the thickness T1 of the first reinforcing member 51 and the thickness T2 of the second reinforcing member 52 satisfy T1≥1.5mm and T2≥1.5mm, and T1≥T2.

[0044] In practice, the first and second reinforcing members 51 and 52 are equivalent to gaskets, and when the thicknesses of the first and second reinforcing members 51 and 52 are both greater than 1.5 mm, firstly, the first and second reinforcing members 51 and 52 are thick, which is convenient for manufacturing, and in addition, the thickness limitation of the first and second reinforcing members 51 and 52 can ensure the reinforcing effect on the inner and outer sides of the end cover portion 11 of the lock shell 1, and if the thicknesses of the first and second reinforcing members 51 and 52 are both small, the reinforcing effect is not obvious, and in addition, the thickness of the first and second reinforcing members 51 and 52 can also be used for corrosion resistance. In addition, the limiting portion 22 located on the inner side of the lock shell 1 directly exerts a large force on the end cover portion 11, and the thickness of the first reinforcing member 51 is set to be large, which can reduce the influence of the limiting portion 22 directly on the end cover portion 11.

[0045] In some embodiments, the sum of the thicknesses of the first and second reinforcing members 51 and 52 and the end cover portion 11 is T3, and T3≥5 mm is satisfied.

[0046] That is, at this time, the thicknesses of the first and second reinforcing members 51 and 52 and the end cover portion 11 are equivalent to the thickness of the external force acting on the first and second reinforcing members 51 and 52 and the end cover portion 11, and when the thicknesses of the first and second reinforcing members 51 and 52 and the end cover portion 11 are greater than or equal to 5 mm, the advantages are good wear resistance and impact resistance, and the strength basically meets the requirements.

[0047] In addition, the lock shell 1 includes the end cover portion 11 and the body portion 12, and the thickness of the top surface formed by the sum of the end cover portion 11 and the first and second reinforcing members 51 and 52 can be set to 8 mm, and the thickness of the body portion 12 is 7 mm, and of course, the thickness of the top surface formed by the sum of the end cover portion 11 and the first and second reinforcing members 51 and 52 and the thickness of the body portion 12 can be optimized according to a ratio of 1.2-1.3:1, which further ensures the stress balance of the lock shell 1, so that the thicknesses of the end cover portion 11 and the body portion 12 are not too different, and the body portion 12 or one of the end cover portions 11 is deformed when the bolt 2 is rotated, thereby affecting the fastening effect of the bolt 2. In addition, the lock shell 1 can currently use 6082-T6 aluminum alloy material, which has good corrosion resistance and wear resistance.

[0048] In some embodiments, the reinforcing structure 5 is adhesively connected to the lock shell 1 or fixedly connected to the lock shell 1 by a fixing member.

[0049] In practice, the first reinforcing member 51 and the second reinforcing member 52 can be bonded to the inner wall and the outer side of the end cover portion 11, respectively, such as a structural adhesive can be used to combine the end cover portion 11 with the first reinforcing member 51 and the second reinforcing member 52 together, the adhesive can fill the tiny gap between the components, the adhesive has twice the strength of traditional bonding methods after curing, has corrosion resistance, can be used for sealing and waterproofing, stress distribution is uniform, has high strength and durability. The structural adhesive can be a two-component structural adhesive, which has excellent bonding strength and durability, can firmly bond metal materials, and ensures the stability and reliability of the bonded parts.

[0050] Alternatively, the first reinforcing member 51 and the second reinforcing member 52 are connected to the lock shell 1 by a fixing member, and then the end cover portion 11 is provided as a blind hole, and the first reinforcing member 51 and the second reinforcing member 52 are connected to the end cover portion 11 by the fixing member, which is convenient for maintenance and easy to disassemble and replace.

[0051] In some embodiments, the material selected for the reinforcing structure 5 has a yield strength σs and a hardness H, and satisfies: σs≥400mpa, H≥40hrc.

[0052] For example, steel materials with a yield strength ≥400mpa and a hardness ≥40hrc are preferred, the use of steel materials can reduce the weight of the lock shell 1 itself, in addition, the limitation of yield strength and hardness can ensure the wear resistance and hardness of the first reinforcing member 51 and the second reinforcing member 52, and the anti-vibration performance is also good, so that the anti-deformation ability of the lock shell 1 is better when the bolt assembly 100 is connected to the vehicle body.

[0053] In some embodiments, the end of the bolt 2 protruding out of the lock shell 1 is provided with a maintenance slot 24. Specifically, the maintenance slot 24 is provided at the top of the bolt 2, that is, when an accident occurs during the locking and unlocking process, causing the bolt 2 and the nut 7 to be stuck, a screwdriver or similar tool is inserted into the maintenance slot 24 at the top of the bolt 2 and rotated in the unlocking direction, the bolt 2 can be manually separated.

[0054] In some embodiments, the outer periphery of the transmission member 3 is provided with an outer gear ring 31, the mounting member 4 is provided with a mounting hole, and the mounting member 4 is provided with an inner gear ring 41 at the mounting hole, the transmission member 3 passes through the mounting hole and the outer gear ring 31 is connected in meshing connection with the inner gear ring 41.

[0055] In practice, when locking, the clamping gun head clamps the transmission member 3, lifts the transmission member 3, rotates the clamping gun head, drives the battery pack box and the bolt assembly 100 to move upward, the bolt 2 is threadedly connected with the nut 7 located on the vehicle body, under the action of the elastic member 6, the transmission member 3 falls back to the inner gear ring 41 part of the mounting member 4, and the outer gear ring 31 of the transmission member 3 cooperates with the inner gear ring 41 of the mounting member 4 to lock.

[0056] When unlocking, the gun head clamping transmission member 3 is lifted up, the gun head rotates reversely, the bolt 2 and the nut 7 are gradually separated, the battery pack and the bolt assembly 100 move downwards, after unlocking is completed, the clamping gun head is separated from the transmission member 3, the bolt 2 is reset, and the outer gear ring 31 of the transmission member 3 is engaged with the inner gear ring 41 of the mounting member 4, so that locking is realized. Through the gear and rack anti-loosening structure, precise engagement can be realized, and the efficiency of preventing the bolt 2 from loosening is relatively high.

[0057] It should be noted that the engagement of the outer gear ring 31 of the transmission member 3 and the inner gear ring 41 of the mounting member 4 can lock the bolt assembly 100, but when the end cover part 11 of the lock shell 1 is deformed, the structure of the whole lock shell 1 is affected, the stress of the bolt assembly 100 and the mounting member 4 can be uneven due to the deformation of the lock shell 1, and the locking performance of the bolt assembly 100 is affected. Therefore, the lock shell 1 is strengthened by the reinforcing structure 5 to prevent the deformation of the end cover part 11 of the lock shell 1, thereby preventing the uneven stress of the whole lock shell 1 from affecting the stress of the bolt 2 and the transmission member 3, and ensuring the reliability of the connection between the bolt assembly 100 and the nut.

[0058] The utility model embodiment further discloses a battery pack, including the bolt assembly 100 of above -mentioned locking mechanism. The battery pack can be welded as a whole with the lock box 8 in the actual manufacturing process, so that the battery pack and the bolt assembly 100 are also the structure of a whole, and when installing and disassembling, more parts are not needed, and only the battery pack is placed in the position capable of being installed on the vehicle body, and the nut assembly is directly connected to the vehicle body, so that the nut assembly is prevented from being lost during installation or disassembly.

[0059] The utility model embodiment further discloses a vehicle, including battery pack, nut assembly and the bolt assembly 100 of above -mentioned locking mechanism, the nut assembly includes lock box 8 and nut 7, and the nut 7 is located in the lock box 8, and the lock box 8 is connected to the vehicle body, and the bolt assembly 100 is connected to the battery pack, and the bolt assembly 100 is arranged in the nut 7 to fix the battery pack to the vehicle body.

[0060] When installing, the lock shell 1 is welded with the battery pack frame, the lock box 8 can also be welded on the vehicle body or connected to the vehicle body through a connecting piece, and the nut 7 is located in the lock box 8. When installing the battery pack, the bolt assembly 100 of the locking mechanism is connected to the battery pack as a whole, and the bolt assembly 100 is not needed to be connected to the battery pack separately. Therefore, the number of parts is small, and the installation is simple. When installing, the strength of the bolt assembly 100 is guaranteed, and the lock shell 1 can be prevented from being damaged due to excessive torsion when the bolt assembly 100 is rotationally connected with the nut 7 in the lock box 8. Therefore, the reliability of the installation of the battery pack of the vehicle is enhanced, the normal use of the electronic equipment of the vehicle is ensured, and the danger caused by the loosening of the battery pack is also prevented.

[0061] 1. In the description of the present application, it is to be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application.

[0062] 2. In the description of the present application, "first feature" and "second feature" can include one or more features.

[0063] 3. In the description of the present application, "a plurality of" means two or more.

[0064] 4. In the description of the present application, "above" or "below" the first feature in the second feature can include direct contact between the first and second features, or can include indirect contact between the first and second features through another feature therebetween.

[0065] 5. In the description of the present application, "above", "above" and "above" of the first feature in the second feature include the first feature directly above and obliquely above the second feature, or only indicate that the first feature is higher than the second feature in horizontal height.

[0066] In the description of the present application, the description of the terms "one embodiment", "some embodiments", "exemplary embodiment", "example", "specific example" or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present application. In the present application, the exemplary description of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0067] Although embodiments of the present application have been shown and described, those skilled in the art can understand that various changes, modifications, replacements and variations can be made to these embodiments without departing from the principles and spirit of the present application, and the scope of the present application is defined by the claims and their equivalents.

Claims

1. A bolt assembly for a locking mechanism, characterized in that, The application relates to a lock mechanism, which comprises a lock shell (1) including a main body (12) and an end cover (11) connected to one end of the main body (12) and jointly defining a mounting space, the end cover (11) being provided with a through hole; a mounting piece (4) connected to the other end of the main body (12), a bolt (2) threaded through the through hole to be screwed with the end cover (11), and a transmission piece (3) movably mounted on the mounting piece (4) and used for selectively driving the bolt (2) to rotate relative to the end cover (11); and a reinforcing structure (5) connected to the end cover (11) and distributed around the through hole. The reinforcing structure (5) comprises a first reinforcing piece (51) connected to the inner wall of the end cover (11), and the outer peripheral wall of the bolt (2) is provided with a limiting portion (22) protruding radially, which is adapted to abut against the first reinforcing piece (51) when the bolt (2) moves to the maximum position along the through hole. The reinforcing structure (5) further comprises a second reinforcing piece (52) connected to the outer side of the end cover (11) and distributed opposite to the first reinforcing piece (51) along the axial direction of the bolt (2). The thickness T1 of the first reinforcing piece (51) and the thickness T2 of the second reinforcing piece (52) satisfy T1 >= 1.5 mm, T2 >= 1.5 mm, and T1 >= T2.

2. The bolt assembly of the locking mechanism according to claim 1, wherein, The sum of the thicknesses of the first reinforcing piece (51), the second reinforcing piece (52) and the end cover (11) is T3, and T3 >= 5 mm.

3. The bolt assembly of the locking mechanism according to claim 2, wherein, The reinforcing structure (5) is adhesively connected to the lock shell (1) or fixedly connected to the lock shell (1) by a fixing piece.

4. The bolt assembly of the locking mechanism according to claim 3, wherein, The yield strength of the material selected for the reinforcing structure (5) is sigma s, and the hardness is H, and sigma s >= 400 mpa and H >= 40 hrc.

5. The bolt assembly of the locking mechanism according to claim 3, wherein, The end of the bolt (2) protruding out of the lock shell (1) is provided with a maintenance groove (24).

6. The bolt assembly of the locking mechanism of claim 1, wherein, The outer periphery of the transmission piece (3) is provided with an outer gear ring (31), the mounting piece (4) is provided with a mounting hole, the mounting piece (4) is provided with an inner gear ring (41) at the mounting hole, the transmission piece (3) passes through the mounting hole, and the outer gear ring (31) is connected in mesh with the inner gear ring (41).

7. The bolt assembly of the locking mechanism according to claim 1, wherein, The bolt assembly (100) comprising the lock mechanism of any one of claims 1-9.

8. The bolt assembly of the locking mechanism of claim 1, wherein, The bolt assembly (100) comprising the lock mechanism of any one of claims 1-9, a nut assembly and a battery pack, the nut assembly comprising a lock box (8) and a nut (7), the nut (7) being located in the lock box (8), the lock box (8) being connected to a vehicle body, the bolt assembly (100) being connected to the battery pack, and the bolt assembly (100) being threaded through the nut (7) to fix the battery pack to the vehicle body.

9. The bolt assembly of the locking mechanism of claim 1, wherein, ​ 10. A battery pack, characterized by, ​ 11. A vehicle characterized by comprising: ​

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