Battery box fixing mechanism with fault tolerance function

Abstract

The present invention provides a battery box fixing mechanism with fault tolerance function, which includes a spring support assembly, a floating nut, an end plate, a fixed pipe fitting, an adapter frame plate and a protective cover; the spring support assembly includes a bracket, a support column and a spring, and the first end of the support column is provided with a connecting circular hole for inserting a stepped shaft into a first bending edge; the spring is in a compressed state and its two ends are respectively fixedly connected to the first bending edge and the floating nut; the first end of the floating nut is set as a trumpet structure, and the second end of the floating nut is provided with an inner groove; a circular connecting port is opened at the lower part of the end plate, and a guide pin is provided at the upper part of the end plate; the upper part of the fixed pipe fitting is fixedly connected to the adapter frame plate, and the upper part of the adapter frame plate is fixedly connected to the second bending edge; a detachable protective cover is provided on the maintenance port on the upper part of the protective cover. The present invention can solve the problem that the fixing mechanism on the nut side is easily damaged due to the increase of positioning error under the condition of frequent replacement of the battery box, thereby extending the service life of the battery box fixing mechanism.

Description

Technical Field

[0001] The present invention belongs to the technical field of battery swapping, and particularly relates to a battery box fixing mechanism with a fault tolerance function. Background Art

[0002] With the large-scale popularization of electric vehicles, how to efficiently and quickly recharge the electric vehicles has become a common concern. Currently, there are mainly two energy replenishment modes: charging mode and battery swapping mode. Compared with the charging mode, the battery swapping mode can adopt the business model of vehicle-battery separation, which greatly reduces the user's vehicle purchase cost, improves the residual value rate of used vehicles, and promotes the development of the electric vehicle industry. At the same time, the battery swapping mode can quickly replenish the energy of electric vehicles, eliminating the user's concern about the charging waiting time. The battery box adopting the battery swapping mode is charged in the constant temperature and humidity environment of the battery swapping station and maintained by professional personnel, which is beneficial to improving the battery life and charging safety.

[0003] For the battery swapping mode, the locking mechanism of the battery box is particularly important as one of the key carriers connecting the battery box and the vehicle body. Due to the characteristics of the large volume and heavy weight of the battery box, under the condition of frequent replacement of the quick-change battery, the positioning error of the locking mechanism becomes larger and larger, resulting in a high failure rate of battery swapping and the problem of damage to the nut fixing mechanism at the vehicle body end, affecting the operation efficiency and the service life of the nut fixing mechanism.

[0004] Therefore, an application for a battery box fixing mechanism with a fault tolerance function is proposed to solve the above problems. Summary of the Invention

[0005] Aiming at the above deficiencies of the prior art, the present invention aims to provide a battery box fixing mechanism with a fault tolerance function. With the help of a spring support assembly, the end of the floating nut is pressed and fitted on the inner end surface of the end plate through the elastic action of the spring. The floating nut can slide on the inner end surface of the end plate for position fine-tuning, realizing the floating function of the floating nut, and being able to solve the problem that the fixing mechanism on the nut side is easily damaged due to the increase in positioning error under the condition of frequent replacement of the battery box, and extending the service life of the battery box fixing mechanism.

[0006] The present invention is realized through the following technical solutions:

[0007] A battery box fixing mechanism with fault-tolerant function, which comprises a spring support assembly, a floating nut, an end plate, a fixing pipe and an adapter frame plate; the spring support assembly comprises a bracket, a support column and a spring, the bracket comprises a first bent edge and a second bent edge, and both bent edges are provided with connecting circular holes; the support column is a cylindrical structure, and a stepped shaft is provided at the first end of the support column, and the stepped shaft is inserted into the connecting circular hole on the first bent edge for plugging and fixing; the spring is sleeved on the support column and is located between the first bent edge and the floating nut, and the two ends of the spring are respectively fixedly connected to the inner end surface of the first bent edge and the inner groove of the second end of the floating nut, and the spring is compressed The floating nut is a square structure and is arranged inside the fixed pipe, the first end of the floating nut is arranged as a bell-mouth structure, the edge of the bell-mouth is in contact with the end plate, the second end of the floating nut is provided with an inner groove, and the inner groove is coaxially arranged with the support column, and the through hole between the inner groove and the bell-mouth is provided with an internal thread; the lower part of the end plate is provided with a circular connecting port corresponding to the bell-mouth, and the upper part of the end plate is fixedly provided with a guide pin; the fixed pipe and the adapter frame are both fixedly provided on the inner end surface of the end plate, the upper part of the fixed pipe is fixedly connected to the adapter frame, and the upper part of the adapter frame is fixedly connected to the second bending edge.

[0008] Preferably, the first bent edge and the second bent edge of the bracket are arranged perpendicular to each other.

[0009] Preferably, a fixing nut is provided on the upper portion of the adapter frame plate, and the adapter frame plate is fixedly connected to the second bent edge via the fixing nut.

[0010] Preferably, there is one connecting circular hole on the first bending edge and the hole has the same diameter as the stepped shaft at the first end of the support column; there are multiple connecting circular holes on the second bending edge and the positions of the multiple connecting circular holes correspond to the positions of the fixing nuts on the adapter frame.

[0011] Preferably, the diameter of the spring is larger than the diameter of the support column and smaller than the diameter of the inner groove of the second end of the floating nut.

[0012] Preferably, the internal thread arranged in the middle of the floating nut matches the external thread on the locking bolt.

[0013] Preferably, the guide pin and the end plate are arranged perpendicular to each other.

[0014] Preferably, it further comprises a rectangular protective cover arranged outside the fixing device, the front end of the protective cover is closed and connected to the end plate, a maintenance opening is opened on the upper part of the protective cover, and a detachable protective cover is arranged on the maintenance opening.

[0015] Preferably, fixing screws are provided on the maintenance opening, and the protective cover plate is detachably arranged on the maintenance opening through the fixing screws.

[0016] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0017] 1. The end of the floating nut of the present invention is pressed and fitted on the inner end surface of the end plate by the elastic force of the spring arranged in a compressed state. When there is a slight deviation when the locking bolt cooperates with the floating nut, the floating nut can slide on the end plate for position fine-tuning, realizing the floating function of the floating nut, avoiding the problem that the fixing mechanism on the nut side is easily damaged when the locking bolt is forcibly screwed in, and extending the service life of the battery box fixing mechanism.

[0018] 2. The setting of the adapter plate and the spring support assembly of the present invention effectively fixes and supports the floating nut.

[0019] 3. The setting of the fixed pipe fitting of the present invention enables the floating nut to perform position fine-tuning within a set range and will not slip off.

[0020] 4. The setting of the guide pin of the present invention plays a guiding role when the locking bolt is screwed in, enabling precise positioning of the locking bolt and the floating nut.

[0021] 5. The setting of the protective cover of the present invention can not only protect the battery box fixing mechanism but also be maintained through the maintenance opening. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 is a schematic internal structure diagram of the battery box fixing mechanism with fault tolerance function of the present invention;

[0023] Figure 2 is a sectional view of the internal structure of the battery box fixing mechanism with fault tolerance function of the present invention;

[0024] Figure 3 is a sectional view of the connection and fixation of the floating nut and the locking mechanism of the present invention;

[0025] Figure 4 is a schematic structure diagram of the protective cover of the present invention;

[0026] Figure 5 is a schematic structure diagram of the locking mechanism used in conjunction with the present invention.

[0027] Description of the reference numerals in the drawings:

[0028] Bracket 11, first bent edge 111, second bent edge 112, support column 12, stepped shaft 121, central through hole 122, spring 13, floating nut 2, inner groove 21, flared structure 22, end plate 3, circular connection port 31, guide pin 4, fixed pipe fitting 5, adapter frame plate 6, fixing nut 61, protective cover 7, protective cover plate 71, side plate 72, fixing screw 73, bottom plate 74, sealing plate 75, locking mechanism 8, locking bolt 81, mounting frame plate 82. Detailed implementation mode

[0029] Hereinafter, exemplary embodiments, features, and aspects of the present invention will be described in detail with reference to the accompanying drawings. The same reference numerals in the drawings denote elements having the same or similar functions. Although various aspects of the embodiments are shown in the drawings, the drawings do not have to be drawn to scale unless otherwise specified.

[0030] A battery box fixing mechanism with a fault tolerance function of the present invention is used to realize the loading and unloading of a battery box for battery replacement, as Figures 1 to 4 shown, which includes a spring support assembly, an end plate 3, a guide pin 4, a fixed pipe fitting 5, an adapter frame plate 6, a floating nut 2, and a protective cover 7.

[0031] The spring support assembly includes a bracket 11, a support column 12, and a spring 13. The bracket 11 is a bent part, generally L-shaped, which includes a first bent edge 111 (vertical surface) and a second bent edge 112

[0032] (horizontal surface) that are perpendicular to each other. Connection round holes are opened on both bent edges, which are respectively used to fix the support column 12 and fixedly connect with the adapter frame plate 6. The diameter of a connection round hole provided on the first bent edge 111 is the same as that of the stepped shaft 121 at the first end of the support column 12, and is used to insert the first end of the support column 12 into the connection round hole to fix the support column 12 to the first bent edge 111. The positions of a plurality of connection round holes provided on the second bent edge 112 correspond to the positions of the fixing nuts 61 on the adapter frame plate. The fixing nuts 61 on the adapter frame plate are welded to the adapter frame plate 6 as a whole, and are used to fixedly connect the second bent edge 112 of the bracket to the adapter frame plate 6.

[0033] The support column 12 is a cylindrical structure. A stepped shaft 121 is provided at the first end of the support column 12, and the end of the stepped shaft 121 is inserted into the connection round hole of the first bent edge 111 of the bracket 11 for plug-in fixation. A central through hole 122 is opened towards the inside at the second end of the support column 12, that is, the inside of the support column 12 is designed as a hollow structure, which is light in weight and can function together with the end plate 3 to support the floating nut 2 through the spring 13.

[0034] The spring 13 is arranged between the first bending edge 111 and the floating nut 2, and is initially arranged in a compressed state. The two ends of the spring in the compressed state will exert a force on both the first bending edge and the floating nut. The diameter of the spring 13 is larger than the diameter of the support column 12, and it can be directly sleeved on the support column 12. The first end of the spring 13 presses against the inner end surface of the first bending edge 111 of the bracket 11 for limiting, and the second end of the spring 13 presses against the inner groove 21 of the second end of the floating nut for limiting. The elastic action of the spring 13 in the compressed state causes the force to be exerted on the floating nut 2, so that the first end of the floating nut 2 can be tightly attached to the end plate 3. Because the connection between the floating nut 2 and the end plate is not fixed by a fixing member, the floating nut can slide on the inner end surface of the end plate 3 when subjected to force, thereby realizing the floating function of the floating nut 2, which is used to fine-tune the deviation when the locking bolt 81 is inserted.

[0035] The end plate 3 is a plate-like structure, and a circular connection opening 31 is opened at the bottom thereof for Figure 5 The locking bolt 81 of the locking mechanism 8 shown is inserted. The guide pin 4 is fixedly arranged on the upper part of the end plate 3 and is perpendicular to the end plate 3. The position of the guide pin 4 corresponds to the position of the circular connection port 31 at the lower part of the end plate 3, and is used to guide and position the battery box to ensure that the locking bolt 81 and the floating nut 2 are precisely positioned to avoid connection errors. The inner end surface of the end plate 3 is fixedly connected to the adapter frame plate 6 and the fixed pipe 5, and the outer end surface of the end plate 3 is fixedly connected after contacting with the mounting frame plate 82 of the locking mechanism.

[0036] The fixed pipe fitting 5 and the adapter frame plate 6 are both arranged between the end plate 3 and the bracket 11. One end of the fixed pipe fitting 5 and the adapter frame plate 6 are both fixedly connected to the end plate 3. The fixed pipe fitting 5 is a square standard profile structure, which is placed between the spring support assembly and the end plate 3. The upper part of the fixed pipe fitting 5 is fixedly connected to the adapter frame plate 6. A plurality of fixing nuts 61 are arranged on the upper part of the adapter frame plate 6, and the positions of the plurality of fixing nuts 61 correspond to the positions of the connecting circular holes arranged on the second bending edge 112. The adapter frame plate 6 is fixedly connected to the bracket 11 at the corresponding connecting circular holes through the fixing nuts 61, so as to fix the spring support assembly.

[0037] The floating nut 2 has a square structure and is arranged inside the fixed pipe fitting 5, and is located between the spring 13 and the end plate 3. The floating nut 2 and the support column 12 are arranged on the same horizontal line and coaxially. The second end of the floating nut 2 corresponds to the central through hole 122 of the support column 12. The first end of the floating nut 2 is provided with a flared structure 22. The edge of the flared opening fits with the inner end face of the end plate 3 and its position corresponds to the circular connection port 31 on the end plate, facilitating the insertion of the locking bolt 81. An inner groove 21 is arranged inside the second end of the floating nut 2. The diameter at the inner groove 21 is larger than the outer diameter of the spring 13, facilitating the insertion of the spring 13 and limiting the end of the spring 13. The diameter of the middle through hole of the floating nut 2 is the same as the diameter of the locking bolt 81, and an internal thread that matches the external thread of the locking bolt is arranged on the middle through hole of the floating nut 2, that is, on the through hole between the inner groove and the flared structure, for the threaded connection and fixation of the locking bolt 81 and the floating nut 2.

[0038] The protective cover 7 is arranged outside the spring support assembly and the fixed pipe fitting 5, and encloses a rectangular structure through the side plate 72, the bottom plate 74 and the sealing plate 75. The front end of the protective cover 7 is hermetically connected to the end plate 3. A maintenance opening is provided in the upper part of the protective cover 7. Fixing screws 73 are arranged on both sides of the maintenance opening for fixing the protective cover plate 71 arranged on it. The protective cover plate 71 is detachably connected to the maintenance opening through the fixing screws 73, facilitating the maintenance and replacement of the components inside the protective cover. The design of the protective cover 7 makes the entire mechanism located inside the protective cover, effectively preventing dust, water stains, etc. during vehicle operation from entering the interior and affecting the use of the mechanism, thereby extending the service life of the fixed mechanism.

[0039] The following further describes the specific embodiments of the present invention:

[0040] When using the present invention, first, the end of the locking bolt of the locking mechanism used in conjunction with it is screwed into the floating nut through the circular connection port provided on the end plate and is threadedly connected to the floating nut. At this time, the guide pin plays a guiding role, which can ensure the precise positioning of the locking bolt and the floating nut and avoid connection errors.

[0041] Because the end of the floating nut is not fixedly connected to the end plate, but is pressed and fitted to the inner end face of the end plate through the elastic action of the spring. Therefore, when the locking bolt is inserted, if there is a slight deviation, the floating nut will fine-tune its position within a certain range inside the fixed pipe fitting, avoiding forced screwing in the case of mutual deviation, which is likely to cause deformation or damage to the fixing mechanism on the nut side, thereby affecting the service life of the fixing mechanism on the nut side.

[0042] The embodiments described above are only descriptions of the preferred embodiments of the present invention and do not limit the scope of the present invention. Without departing from the spirit of the present invention's design, various deformations and improvements made by those of ordinary skill in the art to the technical solutions of the present invention shall fall within the protection scope determined by the claims of the present invention.

Claims

1. A battery box fixing mechanism with fault tolerance function, Characterized in that, It includes a spring support assembly, a floating nut, an end plate, a fixed pipe fitting and a transfer frame plate; The spring support assembly includes a bracket, a support column and a spring. The bracket includes a first bending edge and a second bending edge, and connecting round holes are provided on both bending edges; the support column is of a cylindrical structure, and a stepped shaft is provided at the first end of the support column, and the stepped shaft is inserted into the connecting round hole on the first bending edge for plug-in fixation; the spring is sleeved on the support column and located between the first bending edge and the floating nut, and both ends of the spring are fixedly connected to the inner end surface of the first bending edge and the inner groove at the second end of the floating nut respectively, and the spring is in a compressed state; The floating nut is of a square structure and is arranged inside the fixed pipe fitting. The first end of the floating nut is provided with a flared mouth structure, the edge of the flared mouth fits with the end plate, the second end of the floating nut is provided with an inner groove, and the inner groove is coaxially arranged with the support column. An internal thread is provided in the through hole between the inner groove and the flared mouth; A circular connection port corresponding to the flared mouth is opened at the lower part of the end plate, and a guide pin is fixedly arranged at the upper part of the end plate; Both the fixed pipe fitting and the transfer frame plate are fixedly arranged on the inner end surface of the end plate. The upper part of the fixed pipe fitting is fixedly connected to the transfer frame plate, and the upper part of the transfer frame plate is fixedly connected to the second bending edge; The first bending edge and the second bending edge of the bracket are arranged perpendicular to each other; A fixing nut is arranged at the upper part of the transfer frame plate, and the transfer frame plate is fixedly connected to the second bending edge through the fixing nut.

2. The battery box fixing mechanism with fault tolerance function according to claim 1, Characterized in that, The connecting round hole on the first bending edge is set to one and has the same diameter as the stepped shaft at the first end of the support column; the connecting round holes on the second bending edge are set to multiple, and the positions of the multiple connecting round holes correspond to the positions of the fixing nuts on the transfer frame plate.

3. The battery box fixing mechanism with fault tolerance function according to claim 1, Characterized in that, The diameter of the spring is larger than the diameter of the support column and smaller than the diameter of the inner groove at the second end of the floating nut.

4. The battery box fixing mechanism with fault tolerance function according to claim 1, Characterized in that, The internal thread provided in the middle of the floating nut is in conformity with the external thread on the locking bolt.

5. The battery box fixing mechanism with fault tolerance function according to claim 1, Characterized in that, The guide pin is arranged perpendicular to the end plate.

6. The battery box fixing mechanism with fault tolerance function according to claim 1, Characterized in that, It further includes a rectangular protective cover arranged outside the fixing device. The front end of the protective cover is hermetically connected to the end plate. A maintenance port is opened at the upper part of the protective cover, and a detachable protective cover plate is arranged on the maintenance port.

7. The battery box fixing mechanism with fault tolerance function according to claim 6, Characterized in that, A fixing screw is provided on the maintenance port, and the protective cover plate is detachably arranged on the maintenance port through the fixing screw.

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