Nut assembly, battery replacement locking mechanism and vehicle

Abstract

The utility model discloses a nut assembly, battery change locking mechanism and vehicle belongs to vehicle technical field, the nut assembly includes: mounting shell, nut plate and a plurality of elastic member, mounting shell has mounting groove and mounting hole, mounting hole and mounting groove intercommunication, nut plate is provided in the mounting groove, nut plate has threaded hole, and the elastic member is provided in the mounting groove. The nut plate is connected with the mounting shell through a plurality of elastic pieces, and the elastic pieces are used for applying first reset force to the nut plate, wherein the first reset force enables the threaded hole and the mounting hole to be coaxial. According to the nut assembly, the nut plate is connected with the installation shell through the elastic pieces, the elastic pieces apply the first reset force enabling the threaded hole and the installation hole to be coaxial to the nut plate so as to improve the coaxiality of the installation hole and the threaded hole, and the situation that the offset of the axis of the installation hole and the axis of the threaded hole is too large is avoided; the abrasion of the threaded hole when the battery replacing bolt and the battery replacing nut are screwed is reduced, and the falling risk of the battery pack is reduced, so that the reliability and the service life of the nut assembly are improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to the field of vehicle, specifically, a nut assembly, a battery replacement locking mechanism and a vehicle. BACKGROUND

[0002] With the popularity of electric vehicles, battery packs become one of the main power sources of vehicles, and the traditional charging method is used to supplement the power of the battery pack of the vehicle, which usually consumes a large amount of time. The battery replacement vehicle can shorten the energy supplement time by replacing the battery pack, thereby improving the user experience.

[0003] In the related art, the battery replacement nut on the battery replacement vehicle is usually movably connected to the vehicle body by a pressing plate or the like. When there is a size error between the vehicle body and the battery pack, the position of the battery replacement nut relative to the vehicle body can be adjusted to allow the battery replacement bolt on the battery pack to be smoothly assembled to the battery replacement nut. However, the position of the battery replacement nut before assembly with the battery replacement bolt is random, and the coaxiality error between the battery replacement nut and the battery replacement bolt can be large. The battery replacement bolt needs to be forcibly aligned with the battery replacement nut during assembly, which can easily cause deformation of the battery replacement nut and the battery replacement bolt and damage the thread structure, thereby reducing the reliability and service life of the battery replacement nut and the battery replacement bolt. SUMMARY

[0004] The utility model aims to at least solve one of the above technical problems in the prior art to some extent. To this end, the utility model provides a nut assembly that can improve the reliability and service life of the nut assembly.

[0005] The utility model also provides a battery replacement locking mechanism with the above-mentioned nut assembly.

[0006] The utility model also provides a vehicle with the above-mentioned battery replacement locking mechanism.

[0007] According to the nut assembly of the utility model embodiment, the nut plate is connected to the mounting shell through a plurality of elastic members, and the plurality of elastic members apply a first reset force to the nut plate to make the threaded hole coaxial with the mounting hole, thereby improving the coaxiality of the mounting hole and the threaded hole, avoiding excessive deviation of the axis of the mounting hole from the axis of the threaded hole, reducing the wear of the threaded hole when the battery replacement bolt and the battery replacement nut are screwed, and reducing the risk of battery pack falling, thereby facilitating the improvement of the reliability and service life of the nut assembly.

[0008] According to the nut assembly of the utility model embodiment, the nut plate is connected to the mounting shell through a plurality of elastic members, and the plurality of elastic members apply a first reset force to the nut plate to make the threaded hole coaxial with the mounting hole, thereby improving the coaxiality of the mounting hole and the threaded hole, avoiding excessive deviation of the axis of the mounting hole from the axis of the threaded hole, reducing the wear of the threaded hole when the battery replacement bolt and the battery replacement nut are screwed, and reducing the risk of battery pack falling, thereby facilitating the improvement of the reliability and service life of the nut assembly.

[0009] According to some embodiments of the present application, in the axial direction of the mounting hole, the plurality of elastic members are further used to apply a second reset force to the nut plate to make the nut plate close to the mounting hole.

[0010] According to some embodiments of the present application, the number of elastic members is greater than or equal to three, and the plurality of elastic members are arranged at equal angles around the axis of the mounting hole.

[0011] According to some embodiments of the present application, the elastic member is configured as a compression spring.

[0012] According to some embodiments of the present application, the mounting shell further has a positioning hole and / or an assembly hole.

[0013] According to some embodiments of the present application, the mounting hole is located at the bottom wall of the mounting groove; the nut assembly further comprises: a first limiting plate and a second limiting plate, the first limiting plate and the second limiting plate are connected with the bottom wall of the mounting groove; in the first direction perpendicular to the axis of the mounting hole, the first limiting plate and the second limiting plate are opposite and the distance between them is D1, the width between the first limiting plate and the second limiting plate where the nut plate is located is D2, and the relationship is satisfied: 0.7D1

[0014] According to some embodiments of the present application, the nut assembly further comprises: a third limiting plate and a fourth limiting plate, the third limiting plate is connected with the first limiting plate, and the fourth limiting plate is connected with the second limiting plate; in the axial direction of the mounting hole, the distance between the bottom wall of the mounting groove and the third limiting plate is H1, the thickness of the nut plate between the bottom wall of the mounting groove and the third limiting plate is H2, the distance between the bottom wall of the mounting groove and the fourth limiting plate is H3, and the thickness of the nut plate between the bottom wall of the mounting groove and the fourth limiting plate is H4, and the relationship is satisfied: H1=H3>H2=H4.

[0015] According to some embodiments of the present application, the mounting shell, the first limiting plate, the second limiting plate, the third limiting plate and the fourth limiting plate are an integral part.

[0016] According to another aspect of the present application, the battery replacement locking mechanism comprises the nut assembly.

[0017] According to the battery swapping locking mechanism of this utility model embodiment, its nut plate is connected to the mounting shell through multiple elastic elements. The multiple elastic elements apply a first reset force to the nut plate to make the threaded hole and the mounting hole coaxial, so as to improve the coaxiality of the mounting hole and the threaded hole, avoid excessive offset between the axis of the mounting hole and the axis of the threaded hole, reduce the wear of the threaded hole when the battery swapping bolt and the battery swapping nut are screwed on, reduce the risk of battery pack falling off, thereby improving the reliability and service life of the nut assembly, and thus enhancing the product competitiveness of the battery swapping locking mechanism.

[0018] The vehicle according to another embodiment of the present invention includes the above-described battery swapping locking mechanism.

[0019] According to the vehicle of this utility model embodiment, the nut plate is connected to the mounting shell through multiple elastic elements. The multiple elastic elements apply a first reset force to the nut plate to make the threaded hole and the mounting hole coaxial, so as to improve the coaxiality of the mounting hole and the threaded hole, avoid excessive offset between the axis of the mounting hole and the axis of the threaded hole, reduce the wear of the threaded hole when the battery swapping bolt and the battery swapping nut are tightened, reduce the risk of battery pack falling off, thereby improving the reliability and service life of the nut assembly, and thus improving the product competitiveness of the vehicle.

[0020] Additional aspects and advantages of this invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of a nut assembly according to an embodiment of the present utility model;

[0022] Figure 2 This is a schematic diagram of the battery swapping locking mechanism according to an embodiment of the present utility model;

[0023] Figure 3 yes Figure 2 Enlarged view at point A;

[0024] Figure 4 This is a schematic diagram of a battery pack according to an embodiment of the present utility model;

[0025] Figure 5 This is a schematic diagram of the nut assembly and battery pack mating according to an embodiment of the present utility model;

[0026] Figure 6 yes Figure 1 A schematic diagram of the structure of the middle nut plate, the first limiting plate, the second limiting plate, the third limiting plate, and the fourth limiting plate.

[0027] Figure label:

[0028] Mounting housing 1; mounting groove 11; first limiting plate 12; third limiting plate 13; assembly hole 14; second limiting plate 15; fourth limiting plate 16;

[0029] Nut plate 2; Battery swapping nut 21; Threaded hole 211; Connecting plate 22;

[0030] Elastic element 3;

[0031] Battery pack 4; Battery replacement bolt 41;

[0032] Nut assembly 10; connecting frame 20; fastener 201; battery swapping locking mechanism 100. Detailed Implementation

[0033] The embodiments of this utility model are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein 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 intended to explain this utility model, and should not be construed as limiting this utility model.

[0034] In the description of this utility model, it should be understood that the terms "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0035] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0036] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection, an electrical connection, or a connection that allows communication between them; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0037] The nut assembly 10, the battery swapping locking mechanism 100, and the vehicle according to embodiments of the present invention are described in detail below with reference to the accompanying drawings.

[0038] Reference Figures 1-5 As shown, the nut assembly 10 according to an embodiment of the present utility model includes: a mounting shell 1, a nut plate 2, and a plurality of elastic elements 3. The mounting shell 1 has a mounting groove 11 and a mounting hole, the mounting hole communicating with the mounting groove 11. The nut plate 2 is disposed in the mounting groove 11 and has a threaded hole 211. The nut plate 2 is connected to the mounting shell 1 through a plurality of elastic elements 3. The plurality of elastic elements 3 are used to apply a first reset force to the nut plate 2 to make the threaded hole 211 coaxial with the mounting hole.

[0039] in, Figures 1-5 The X direction shown is the length direction of the vehicle, i.e., the front-to-back direction; the Y direction is the width direction of the vehicle, i.e., the left-to-right direction; and the Z direction is the height direction of the vehicle, i.e., the up-to-down direction. The Z direction is parallel to the axis of the mounting hole and the axis of the threaded hole 211.

[0040] The nut assembly 10 can be used in vehicles with battery swapping capabilities. The nut assembly 10 is fixedly connected to the vehicle body and forms an integral part of the vehicle body. When swapping batteries, the depleted battery pack 4 on the vehicle is separated from the nut assembly 10, and then the fully charged battery pack 4 is fixed to the nut assembly 10.

[0041] The nut assembly 10 includes: a mounting housing 1, a nut plate 2, and multiple elastic elements 3. The mounting housing 1 can be directly or indirectly connected to the vehicle body. The mounting housing 1 has a mounting groove 11, which can be used to accommodate the nut plate 2. The nut plate 2 is disposed in the mounting groove 11 and connected to the mounting housing 1 through multiple elastic elements 3, so that the nut plate 2 can move relative to the mounting housing 1 by compressing or stretching the elastic elements 3. The nut plate 2 has a threaded hole 211. The mounting housing 1 also has a mounting hole communicating with the mounting groove 11. The multiple elastic elements 3 apply a first reset force to the nut plate 2 to make the threaded hole 211 coaxial with the mounting hole. The nut plate 2 can maintain the threaded hole 211 coaxial with the mounting hole under the action of the first reset force, so as to improve the coaxiality of the mounting hole and the threaded hole 211 before the battery pack 4 is assembled.

[0042] It is understandable that each elastic element 3 can be stretched and compressed. When the threaded hole 211 is coaxial with the mounting hole, the resultant force of multiple elastic elements 3 on the nut plate 2 is zero, and the threaded hole 211 can maintain the coaxial position of the mounting hole. When the nut plate 2 moves relative to the mounting shell 1, the threaded hole 211 is misaligned with the mounting hole. The movement of the nut plate 2 causes the stretching or compression of the elastic element 3 to change, thereby forming the first restoring force of the resultant force of multiple elastic elements 3 on the nut plate 2. Under the action of the first restoring force, the nut plate 2 can return to the position where the threaded hole 211 is coaxial with the mounting hole.

[0043] For example, when the nut plate 2 moves forward relative to the mounting hole, the tensile or compressive amount of the multiple elastic elements 3 changes in the front-back direction, and the multiple elastic elements 3 apply a first rearward restoring force to the nut plate 2. When the nut plate 2 moves to the left relative to the mounting hole, the tensile or compressive amount of the multiple elastic elements 3 changes in the left-right direction, and the multiple elastic elements 3 apply a first rightward restoring force to the nut plate 2 to ensure the coaxiality of the mounting hole and the threaded hole 211.

[0044] When the battery pack 4 is fixed to the vehicle body by the nut assembly 10, the battery swapping bolt 41 on the battery pack 4 can pass through the mounting hole and engage with the threaded hole 211. Because the mounting hole and the threaded hole 211 are kept coaxial by the multiple elastic elements 3 of the nut plate 2, the coaxiality error between the battery swapping bolt 41 and the threaded hole 211 is small after the battery swapping bolt 41 passes through the mounting hole. The battery swapping bolt 41 can be screwed into the threaded hole 211 more easily, reducing the positional error between the threaded hole 211 and the battery swapping bolt 41, reducing the risk of deformation of the nut plate 2 and the battery swapping bolt 41 and wear of the threaded hole 211, improving the reliability of the connection between the nut plate 2 and the battery swapping bolt, and reducing the risk of connection failure between the nut plate 2 and the battery swapping bolt 41.

[0045] It should be noted that the diameter of the mounting hole is larger than the diameter of the threaded hole 211, and the diameter of the mounting hole is also larger than the outer diameter of the battery swapping bolt 41. When there is a deviation in the position of the vehicle body and the battery pack 4, the battery swapping bolt 41 can still pass through the mounting hole, and the nut plate 2 can be moved during the screwing into the threaded hole 211 to make the threaded hole 211 coaxial with the battery swapping bolt 41, so as to ensure that the battery pack 4 is assembled smoothly.

[0046] According to the nut assembly 10 of this utility model embodiment, the nut plate 2 is connected to the mounting shell 1 through a plurality of elastic elements 3. The plurality of elastic elements 3 apply a first reset force to the nut plate 2 to make the threaded hole 211 coaxial with the mounting hole, so as to improve the coaxiality of the mounting hole and the threaded hole 211, avoid excessive offset between the axis of the mounting hole and the axis of the threaded hole 211, reduce the deformation and wear of the threaded hole 211 when the battery swapping bolt 41 and the battery swapping nut 21 are screwed together, reduce the risk of the battery pack 4 falling off, and thus help improve the reliability and service life of the nut assembly 10.

[0047] In some embodiments of this utility model, reference is made to Figure 1 As shown, the nut plate 2 includes a connecting plate 22 and a battery-swapping nut 21. The connecting plate 22 can be a plate-shaped structure with a through hole, and the battery-swapping nut 21 has a threaded hole 211 coaxial with the through hole. The connecting plate 22 and the battery-swapping nut 21 are integrally cast or welded together.

[0048] In some other embodiments of this utility model (not shown in the figure), the nut plate 2 is constructed as a flat plate and has a threaded hole 211 directly formed therein.

[0049] In some embodiments of this utility model, reference is made to Figures 1-5 As shown, in the axial direction of the mounting hole, multiple elastic elements 3 are also used to apply a second restoring force to the nut plate 2, bringing the nut plate 2 closer to the mounting hole.

[0050] The nut plate 2 is connected to the mounting shell 1 by multiple elastic elements 3. In the axial direction of the mounting hole, i.e., the up-down direction, the multiple elastic elements 3 apply a second restoring force to the nut plate 2, so that the nut plate 2 abuts against the inner wall of the mounting groove 11 with the mounting hole, preventing the nut plate 2 from shaking in the mounting shell 1 along the axial direction of the mounting hole, so that the threaded hole 211 fits with the opening of the mounting hole. When the battery replacement bolt 41 passes through the mounting hole from bottom to top along the axial direction of the mounting hole and engages with the threaded hole 211, the battery replacement bolt 41 can be directly inserted into the threaded hole 211 and screwed in, which helps to reduce the assembly difficulty. At the same time, the elastic elements 3 can produce a buffering effect during the assembly process of the battery replacement bolt 41.

[0051] Specifically, multiple elastic elements 3 may have the same tension or compression state in the axial direction (up and down direction) of the mounting hole. For example, the nut plate 2 is located above the mounting hole, and multiple elastic elements 3 are all located above the nut plate 2 and are in a compressed state. The multiple elastic elements 3 together exert a downward pressure on the nut plate 2 as a second reset force, so that the nut plate 2 is pressed tightly against the bottom wall of the mounting groove 11 with the mounting hole. When the battery swapping bolt 41 passes through the mounting hole from bottom to top, during the process of screwing the battery swapping bolt 41 into the threaded hole 211 of the nut plate 2, if the coaxiality between the threaded hole 211 and the battery swapping bolt 41 is good, the battery swapping bolt 41 can be directly screwed into the threaded hole 211 to facilitate the assembly of the battery swapping bolt 41. If the coaxiality between the threaded hole 211 and the battery swapping bolt 41 is poor, the battery swapping bolt 41 needs to move the threaded hole 211 during the upward movement. During this process, the nut plate 2 will be pushed upward by the battery swapping bolt 41. Multiple elastic elements 3 can absorb the impact of the battery swapping bolt 41 on the nut plate 2 through compression to reduce the impact force of the collision between the battery swapping bolt 41 and the nut plate 2.

[0052] In the above embodiment, in the axial direction of the mounting hole, the elastic element 3 applies a second reset force to the nut plate 2 near the inner wall of the mounting groove 11 with the mounting hole, to prevent the nut plate 2 from shaking in the axial direction of the mounting hole inside the mounting shell 1. The battery replacement bolt 41 can be directly inserted into the threaded hole 211 and screwed together, which helps to reduce the assembly difficulty. At the same time, the elastic element 3 can form a buffer effect during the assembly process of the battery replacement bolt 41 to reduce the impact force between the battery replacement bolt 41 and the nut plate 2, and reduce the risk of damage to the battery replacement bolt 41 and the nut plate 2.

[0053] In some embodiments of this utility model, reference is made to Figure 1 and Figure 3As shown, the number of elastic elements 3 is greater than or equal to three, and the multiple elastic elements 3 are arranged at equal angular intervals around the axis of the mounting hole.

[0054] Specifically, the nut assembly 10 may include three, four, five, six or other elastic elements 3. The nut plate 2 is connected to the mounting shell 1 through multiple elastic elements 3 to ensure the stability of the nut assembly 10. The multiple elastic elements 3 may be arranged at equal angular intervals around the axis of the mounting hole to ensure that the multiple elastic elements 3 stably and reliably apply a first reset force to the nut plate 2 to make the threaded hole 211 coaxial with the mounting hole.

[0055] For example, refer to Figure 1 As shown, there are four elastic elements 3. The projections of the four elastic elements 3 onto the XY plane perpendicular to the axis of the mounting hole are radial, and the included angle between the projections of two adjacent elastic elements 3 is 90°. Alternatively, there are three elastic elements 3. The projections of the three elastic elements 3 onto the XY plane perpendicular to the axis of the mounting hole are radial, and the included angle between the projections of two adjacent elastic elements 3 is 120°. Therefore, when the nut plate 2 moves in any direction on the XY plane, the multiple elastic elements 3 can apply a first restoring force to the nut plate 2, making the threaded hole 211 coaxial with the mounting hole.

[0056] In some embodiments of this utility model, reference is made to Figures 1-5 As shown, the elastic element 3 is constructed as a compression spring.

[0057] Specifically, the elastic element 3 can be constructed as a compression spring. Compression springs have advantages such as high energy conversion efficiency, compact structure, and strong fatigue resistance. The position where the threaded hole 211 coincides with the axis of the mounting hole is the origin position. The elastic element 3 applies a first reset force to the nut plate 2 to make the threaded hole 211 coaxial with the mounting hole, which can keep the threaded hole 211 at the origin position and enable the battery swapping nut 21 to automatically return to the origin position, so that the battery swapping bolt 41 and the battery swapping nut 21 can be aligned. At the same time, the elastic element 3 applies a second reset force to the nut plate 2 to make the nut plate 2 closer to the mounting hole, which can reduce the impact of the battery swapping bolt 41 on the nut assembly 10 on the battery pack 4, so as to avoid damage to the nut assembly 10, thereby helping to extend the service life of the battery swapping locking mechanism 100.

[0058] In some other embodiments of this utility model, the elastic element 3 may also be a gas spring, a compression rod, a support rod, or other structures.

[0059] In some embodiments of this utility model, reference is made to Figure 1 and Figure 3 As shown, the mounting housing 1 also has positioning holes and / or assembly holes 14.

[0060] In some embodiments, the mounting housing 1 may have a mounting hole 14, and the mounting housing 1 may be fixedly connected to the vehicle body by a fastener 201. The fastener 201 may pass through the mounting hole 14 and be threaded into the vehicle body for fixation. The fastener 201 may be a fastening bolt to facilitate the installation and removal of the nut assembly 10 from the vehicle body.

[0061] In other embodiments, the mounting housing 1 may have a positioning hole and an assembly hole 14. The vehicle body connected to the positioning hole may be integrated with a positioning pin that mates with the positioning hole. When the mounting housing 1 is assembled with the vehicle body, the positioning pin can be inserted into the positioning hole to achieve pre-positioning. The fastener 201 can directly pass through the assembly hole 14 and be threaded with the vehicle body for fixation. This can shorten the assembly time of the nut assembly 10 with the vehicle body and improve the assembly speed.

[0062] In some other embodiments (not shown in the figures), the mounting housing 1 may have a positioning hole, and a positioning pin that mates with the positioning hole may be integrated on the vehicle body connected to the positioning hole. When the mounting housing 1 is assembled with the vehicle body, the positioning pin can be inserted into the positioning hole to achieve pre-positioning, so that the nut assembly 10 can be quickly installed on the vehicle body by welding or bonding.

[0063] It should be noted that there can be multiple mounting shells 1, and multiple positioning holes and / or assembly holes 14. Multiple mounting shells 1 correspond one-to-one with multiple positioning holes and / or assembly holes 14. The vehicle body can be connected to the corresponding mounting shell 1 through multiple positioning holes and / or assembly holes 14 to improve the stability and reliability of the connection between the vehicle body and the nut assembly 10.

[0064] In the above embodiment, the vehicle body is connected and fixed to the mounting shell 1 through positioning holes and / or assembly holes 14, so as to facilitate quick installation and removal of the nut assembly 10 from the vehicle body and the battery swapping bolt 41 on the battery pack 4.

[0065] In some embodiments of this utility model, reference is made to Figures 1-6 As shown, the mounting hole is located on the bottom wall of the mounting groove 11. The nut assembly 10 also includes a first limiting plate 12 and a second limiting plate 15. Both the first limiting plate 12 and the second limiting plate 15 are connected to the bottom wall of the mounting groove 11. In a first direction perpendicular to the axis of the mounting hole, the first limiting plate 12 and the second limiting plate 15 are opposite each other and spaced apart by a distance D1. The width of the nut plate 2 between the first limiting plate 12 and the second limiting plate 15 is D2, satisfying the relationship: 0.7D1<D2<D1.

[0066] The mounting hole can be located on the bottom wall of the mounting groove 11 and communicate with the mounting groove 11, as shown in the figure. Figure 5As shown, in the axial direction of the mounting hole, i.e., the up-down direction, the battery replacement bolt 41 passes through the mounting hole from bottom to top and screws into the threaded hole 211. The diameter of the mounting hole is larger than the diameter of the threaded hole 211 to facilitate the passage of the battery replacement bolt 41 and reduce the collision between the battery replacement bolt 41 and the mounting shell 1. The mounting groove 11 can also accommodate the first limiting plate 12 and the second limiting plate 15. Both the first limiting plate 12 and the second limiting plate 15 are connected to the bottom wall of the mounting groove 11. (Refer to...) Figure 6 As shown, the first limiting plate 12 and the second limiting plate 15 are symmetrical about the width of the nut plate 2.

[0067] Specifically, the first direction perpendicular to the axis of the mounting hole can be Figure 1 In the left-right direction, in the first direction perpendicular to the axis of the mounting hole, the relationship 0.7D1 < D2 < D1 is satisfied. This means that when the battery-changing bolt 41 and the battery-changing nut 21 are engaged, the battery-changing bolt 41 rotates around the axis of the mounting hole in the threaded hole 211. The threaded hole 211 and the battery-changing bolt 41 are subjected to torque, and the nut plate 2 tends to rotate around the axis of the mounting hole. If D2 ≤ 0.7D1, the nut plate 2 has a large rotational angle between the first limiting plate 12 and the second limiting plate 15, and the elastic element 3 connected to the nut plate 2 is at risk of damage. If D2 ≥ D1, the space reserved for the left and right positions of the nut plate 2 in the mounting groove 11 is too small, the XY plane movement of the nut plate 2 between the first limiting plate 12 and the second limiting plate 15 is too small, and the adjustable space of the nut plate 2 is small, making it difficult to adjust the nut plate 2 to be directly opposite the battery-changing bolt 41. Optionally, D2 = 0.8D1 or D2 = 0.9D1.

[0068] In the above embodiment, the first limiting plate 12 and the second limiting plate 15 are opposite each other and spaced apart by a distance D1. The nut plate 2 is located between the first limiting plate 12 and the second limiting plate 15 with a width D2 that satisfies the relationship: 0.7D1<D2<D1. This can reduce the rotation angle of the nut plate 2 around the axis of the mounting hole when the nut plate 2 is subjected to torque, and avoid damage to the elastic element 3 connected to the nut plate 2. Sufficient space is reserved on the left and right sides of the nut plate 2 in the mounting groove 11 to facilitate the assembly of the electric replacement bolt 41 with the nut plate 2.

[0069] In some embodiments of this utility model, reference is made to Figures 1-6As shown, the nut assembly 10 also includes a third limiting plate 13 and a fourth limiting plate 16. The third limiting plate 13 is connected to the first limiting plate 12, and the fourth limiting plate 16 is connected to the second limiting plate 15. In the axial direction of the mounting hole, the distance between the bottom wall of the mounting groove 11 and the third limiting plate 13 is H1, the thickness of the nut plate 2 between the bottom wall of the mounting groove 11 and the third limiting plate 13 is H2, the distance between the bottom wall of the mounting groove 11 and the fourth limiting plate 16 is H3, and the thickness of the nut plate 2 between the bottom wall of the mounting groove 11 and the fourth limiting plate 16 is H4, satisfying the relationship: H1 = H3 > H2 = H4.

[0070] Among them, reference Figure 6 As shown, the first limiting plate 12 and the third limiting plate 13 can be connected by welding, fastener connection, casting, etc. The connection of the first limiting plate 12 and the third limiting plate 13 forms an L-shape. Similarly, the connection of the second limiting plate 15 and the fourth limiting plate 16 also forms an L-shape. In the axial direction of the mounting hole, that is... Figure 6 The vertical direction of the nut plate 2 satisfies the relationship: H1 = H3 > H2 = H4. It can be understood that H1 = H3 and H2 = H4 can ensure that when the nut plate 2 moves to abut against the third limit plate 13 and the fourth limit plate 16, the height of the left and right ends of the nut plate 2 is the same, so that the axis of the threaded hole 211 is parallel to the axis of the electric switch bolt 41, thereby reducing the risk of the nut plate 2 being pushed off course and avoiding the problem of stripping caused by the misalignment of the threaded hole 211 and the electric switch bolt 41.

[0071] Meanwhile, H1 > H2 and H3 > H4, so that the nut plate 2 has sufficient clearance in the axial direction of the mounting hole. When the electric bolt 41 passes through the mounting hole from bottom to top along the axial direction of the mounting hole and mates with the threaded hole 211, the nut plate 2 can move a certain distance along the axial direction of the mounting hole. The third limiting plate 13 and the fourth limiting plate 16 together limit the distance the nut plate 2 moves along the Z direction to prevent the nut plate 2 from moving too far upward, so as to avoid excessive compression of the elastic element 3 connected to the nut plate 2, which would cause damage to the elastic element 3. At this time, the elastic element 3 can absorb energy and alleviate the impact when the nut assembly 10 collides with the third limiting plate 13 and the fourth limiting plate 16.

[0072] In the above embodiment, H1 = H3 > H2 = H4, and the gaps between the surface of the nut plate 2 and the third limiting plate 13 and the fourth limiting plate 16 are the same, so as to reduce the risk of the nut plate 2 being deflected and failing. At the same time, it can limit the movement distance of the nut plate 2 along the Z direction, avoid damage to the elastic element 3 connected to the nut plate 2, and at the same time, the elastic element 3 can absorb energy and mitigate impact.

[0073] In some embodiments of this utility model, reference is made to Figures 1-3 As shown, the mounting shell 1, the first limiting plate 12, the second limiting plate 15, the third limiting plate 13 and the fourth limiting plate 16 are a single piece.

[0074] The mounting shell 1 can be cast together with the first limiting plate 12, the second limiting plate 15, the third limiting plate 13 and the fourth limiting plate 16, reducing the number of parts and improving the integration of the nut assembly 10. This facilitates the assembly and disassembly of the nut plate 2 and the elastic element 3 in the mounting groove 11, thereby improving the assembly speed.

[0075] In the above embodiment, the mounting shell 1, the first limiting plate 12, the second limiting plate 15, the third limiting plate 13 and the fourth limiting plate 16 are integral parts and together define the mounting groove 11 to facilitate the assembly of the nut plate 2 and multiple elastic elements 3.

[0076] According to the nut assembly 10 of this utility model embodiment, the nut plate 2 is connected to the mounting shell 1 through a plurality of elastic elements 3, so that the nut plate 2 has a floating function in the three spatial directions of X, Y and Z. When the battery pack 4 is replaced, the plurality of elastic elements 3 can reduce the Z-direction impact force and the X and Y-direction lateral forces caused by positioning errors when the battery replacement bolt 41 and the battery replacement nut 21 are screwed together. It also makes the nut plate 2 have a self-resetting and position holding function. In the natural state, the threaded hole 211 of the nut plate 2 is at the theoretical origin position, that is, the threaded hole 211 will not have a large offset relative to the vehicle body, which facilitates the alignment of the battery replacement bolt 41 and the threaded hole 211 during the battery replacement process, so as to protect the thread structure of the threaded hole 211 and the battery replacement bolt 41 and extend the service life of the nut assembly 10 and the battery replacement bolt 41.

[0077] Reference Figures 1-6 As shown, the battery swapping locking mechanism 100 according to an embodiment of the present invention includes the nut assembly 10 of the above embodiment.

[0078] The battery swapping locking mechanism 100 includes a nut assembly 10 and a connecting frame 20. The nut assembly 10 can be welded or bolted to the connecting frame 20. The connecting frame 20 can be welded or bolted to the vehicle body and form an integral part of the vehicle body. The battery swapping locking mechanism 100 can be used in vehicles, such as cars and trucks.

[0079] According to the embodiment of the present utility model, the battery swapping locking mechanism 100 has a nut plate 2 connected to the mounting shell 1 through multiple elastic elements 3. The multiple elastic elements 3 apply a first reset force to the nut plate 2 to make the threaded hole 211 coaxial with the mounting hole, so as to improve the coaxiality of the mounting hole and the threaded hole 211, avoid excessive offset between the axis of the mounting hole and the axis of the threaded hole 211, reduce the wear of the threaded hole 211 when the battery swapping bolt 41 and the battery swapping nut 21 are screwed together, reduce the risk of the battery pack 4 falling off, thereby improving the reliability and service life of the nut assembly 10, and thus improving the product competitiveness of the battery swapping locking mechanism 100.

[0080] The vehicle according to an embodiment of the present invention includes the battery swapping locking mechanism 100 described in the above embodiment.

[0081] According to the vehicle of this utility model embodiment, the nut plate 2 is connected to the mounting shell 1 through a plurality of elastic elements 3. The plurality of elastic elements 3 apply a first reset force to the nut plate 2 to make the threaded hole 211 coaxial with the mounting hole, so as to improve the coaxiality of the mounting hole and the threaded hole 211, avoid excessive offset between the axis of the mounting hole and the axis of the threaded hole 211, reduce the wear of the threaded hole 211 when the battery swapping bolt 41 and the battery swapping nut 21 are screwed together, reduce the risk of the battery pack 4 falling off, thereby improving the reliability and service life of the nut assembly 10, and thus improving the product competitiveness of the vehicle.

[0082] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. In addition, those skilled in the art can combine and integrate the different embodiments or examples described in this specification.

[0083] Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of the present invention.

Claims

1. A nut assembly, characterized in that, include: Mounting housing (1), the mounting housing (1) having mounting groove (11) and mounting hole, the mounting hole communicating with the mounting groove (11); Nut plate (2), the nut plate (2) is disposed in the mounting groove (11), the nut plate (2) has a threaded hole (211); Multiple elastic elements (3) are provided, and the nut plate (2) is connected to the mounting shell (1) through the multiple elastic elements (3). The multiple elastic elements (3) are used to apply a first reset force to the nut plate (2) to make the threaded hole (211) coaxial with the mounting hole.

2. The nut assembly according to claim 1, characterized in that, In the axial direction of the mounting hole, a plurality of the elastic elements (3) are also used to apply a second restoring force to the nut plate (2) to bring the nut plate (2) closer to the mounting hole.

3. The nut assembly according to claim 2, characterized in that, The number of elastic elements (3) is greater than or equal to three, and the multiple elastic elements (3) are arranged at equal angular intervals around the axis of the mounting hole.

4. The nut assembly according to claim 3, characterized in that, The elastic element (3) is constructed as a compression spring.

5. The nut assembly according to claim 1, characterized in that, The mounting housing (1) also has positioning holes and / or assembly holes (14).

6. The nut assembly according to any one of claims 1-5, characterized in that, The mounting hole is located on the bottom wall of the mounting groove (11); The nut assembly further includes a first limiting plate (12) and a second limiting plate (15), both of which are connected to the bottom wall of the mounting groove (11). In a first direction perpendicular to the axis of the mounting hole, the first limiting plate (12) and the second limiting plate (15) are opposite each other and spaced apart by a distance of D1. The nut plate (2) is located between the first limiting plate (12) and the second limiting plate (15) with a width of D2, satisfying the relationship: 0.7D1<D2<D1.

7. The nut assembly according to claim 6, characterized in that, The nut assembly further includes a third limiting plate (13) and a fourth limiting plate (16), wherein the third limiting plate (13) is connected to the first limiting plate (12) and the fourth limiting plate (16) is connected to the second limiting plate (15). In the axial direction of the mounting hole, the distance between the bottom wall of the mounting groove (11) and the third limiting plate (13) is H1, the thickness of the nut plate (2) between the bottom wall of the mounting groove (11) and the third limiting plate (13) is H2, the distance between the bottom wall of the mounting groove (11) and the fourth limiting plate (16) is H3, and the thickness of the nut plate (2) between the bottom wall of the mounting groove (11) and the fourth limiting plate (16) is H4, satisfying the relationship: H1=H3>H2=H4.

8. The nut assembly according to claim 7, characterized in that, The mounting shell (1), the first limiting plate (12), the second limiting plate (15), the third limiting plate (13), and the fourth limiting plate (16) are an integral piece.

9. A battery swapping locking mechanism, characterized in that, Includes the nut assembly according to any one of claims 1-8.

10. A vehicle, characterized in that, Includes the battery swapping locking mechanism as described in claim 9.

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