Power battery pack fastening bolt structure with quick change function

Abstract

The invention relates to the technical field of power battery pack fastening, and discloses a power battery pack fastening bolt structure with a quick change function, which comprises an automobile chassis, a power battery pack, a fixing assembly, a driving assembly and a locking assembly, and is characterized in that the power battery pack is positioned in the automobile chassis; the fixing assembly, the driving assembly and the locking assembly are located in the power battery pack; the bolt is screwed off, then the cover plate is pulled downwards through the easy-to-pull groove in the bottom of the cover plate to drive the positioning column to be separated from the power battery pack, then the hand wheel can be reversely rotated to enable the internal thread sliding block to drive the insertion plate to be separated from the insertion groove of the automobile chassis, and therefore the power battery pack can be unlocked from a battery cabin of the automobile chassis. Furthermore, the power battery pack is moved downwards to finish the disassembly work, so that the quick change effect of the power battery pack is realized; and through the self-locking property of the worm gear and the worm, the stability of the plugboard can be ensured, so that the mounting stability of the power battery pack is improved.

Description

Technical Field

[0001] The present invention belongs to the technical field of power battery pack fastening, and in particular relates to a power battery pack fastening bolt structure with a quick-change function. Background Art

[0002] As electric vehicles become more and more popular, consumers are paying more and more attention to the driving range, charging time, and battery life of electric vehicles. As a result, concepts such as "quick battery replacement" and "buy a car and rent a battery" have emerged. At present, the power batteries of most electric vehicles are fixed in the battery compartment of the electric vehicle chassis by multiple sets of bolts. Therefore, when disassembling and assembling the power battery, multiple sets of fixing bolts need to be disassembled and assembled one by one, which affects the disassembly and assembly efficiency of the power battery. For this reason, we propose a power battery pack fastening bolt structure with a quick-change function. Summary of the invention

[0003] In view of the above situation, in order to overcome the defects of the prior art, the present invention provides a power battery pack fastening bolt structure with a quick-change function, which effectively solves the problem that the power batteries of most electric vehicles are currently fixed in the battery compartment of the electric vehicle chassis by multiple sets of bolts. Therefore, when disassembling and assembling the power batteries, multiple sets of fixing bolts need to be disassembled and assembled one by one, thereby affecting the disassembly and assembly efficiency of the power batteries.

[0004] To achieve the above object, the present invention provides the following technical solution: a power battery pack fastening bolt structure with a quick-change function, comprising a vehicle chassis, a power battery pack, a fixing assembly, a driving assembly and a locking assembly, characterized in that: the power battery pack is located inside the vehicle chassis, and the fixing assembly, the driving assembly and the locking assembly are located inside the power battery pack;

[0005] A battery compartment is provided at the bottom of the automobile chassis, and the power battery pack is placed in the battery compartment at the bottom of the automobile chassis. Slots are evenly provided on the front and rear sides of the inner side walls of the battery compartment at the bottom of the automobile chassis.

[0006] Preferably, the fixing assembly includes a cover plate, positioning columns are evenly arranged on the top of the cover plate, magnetic blocks are inlaid on the top of the positioning columns, an iron block is magnetically attracted to the top of the magnetic blocks, a countersunk hole is penetrated through the bottom of the cover plate, bolts are arranged in the countersunk hole, an easy-pull groove is arranged on the bottom of the cover plate, and a group of limiting holes are arranged on the left and right sides of the bolt.

[0007] Preferably, the driving assembly includes a handwheel, a worm is arranged on the top of the handwheel, a worm wheel is meshed on the left side of the worm, a through hole is penetrated through the front side of the worm wheel, a bidirectional screw is arranged in the through hole, and a socket is penetrated through the bottom of the handwheel.

[0008] Preferably, the locking assembly comprises an internal thread slider, and insert plates are evenly arranged on opposite sides of two groups of the internal thread sliders.

[0009] Preferably, two groups of first slide grooves are evenly opened inside the power battery pack, and a mounting groove is opened between the two groups of first slide grooves. Second slide grooves are evenly opened on the front and rear sides of the power battery pack respectively, and the second slide grooves are connected with the mounting grooves and correspond to the slots of the automobile chassis.

[0010] Preferably, the worm gear is rotatably arranged in the mounting groove and the first slide groove of the power battery pack through a bearing, the internal thread slider is threaded on the outer side of the worm gear and slidably arranged in the first slide groove of the power battery pack, and the plug plate is arranged in the second slide groove of the power battery pack and inserted into the slot of the automobile chassis.

[0011] Preferably, a square groove is provided at the bottom of the power battery pack, a groove and a threaded hole are provided at the top of the inner side wall of the square groove, positioning holes are evenly provided at the top of the inner side wall of the square groove, the handwheel is arranged in the groove, the worm is arranged in the mounting groove of the power battery pack through a bearing, the bottom of the worm passes through the mounting groove and the groove and is connected to the handwheel, the iron block is embedded in the top of the inner side wall of the positioning hole, the cover plate is arranged in the square groove, the positioning column is inserted in the positioning hole, the bolt passes through the insertion hole of the handwheel and is screwed with the threaded hole, a group of storage grooves are provided on the left and right sides of the inner side wall of the threaded hole, a spring is arranged in the storage groove, a round head pin is provided on the outer side wall of the spring, and the round head part of the round head pin is inserted in the limiting hole of the bolt.

[0012] Compared with the prior art, the present invention has the following beneficial effects:

[0013] 1. Unscrew the bolts, pull the cover downward through the easy-pull groove at the bottom of the cover to drive the positioning column to separate from the power battery pack, and then turn the hand wheel in the opposite direction to make the internal thread slider drive the plug plate to separate from the slot of the car chassis, so that the power battery pack can be unlocked from the battery compartment of the car chassis, and then move the power battery pack downward to complete the disassembly work, thereby achieving the effect of quick replacement of the power battery pack;

[0014] 2. The power battery pack is fixed in the battery compartment of the vehicle chassis through the plug-in board. The self-locking property of the worm gear can effectively ensure the plug-in stability of the plug-in board, thereby improving the installation stability of the power battery pack;

[0015] 3. The square groove at the bottom of the power battery pack can be covered by the cover plate to improve the aesthetics of the entire power battery pack, and the position of the cover plate and the hand wheel can be fixed by bolts. By locking the position of the hand wheel, the plug-in stability of the plug-in plate can be further improved, thereby improving the reliability of the device. When the bolt is tightened, the round head pin is driven by the spring to insert into the limiting hole of the bolt, which can effectively prevent the possibility of the bolt loosening during the bumpy process of the car, thereby ensuring the safety of the device. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The accompanying drawings are used to provide further understanding of the present invention and constitute a part of the specification. They are used to explain the present invention together with the embodiments of the present invention and do not constitute a limitation of the present invention.

[0017] In the attached picture:

[0018] Figure 1 It is a structural schematic diagram of a fastening bolt structure of a power battery pack with a quick-change function according to the present invention;

[0019] Figure 2 A fastening bolt structure for a power battery pack with a quick-change function according to the present invention Figure 1 A magnified view of part A;

[0020] Figure 3 It is a front cross-sectional view of a fastening bolt structure of a power battery pack with a quick-change function according to the present invention;

[0021] Figure 4 A fastening bolt structure for a power battery pack with a quick-change function according to the present invention Figure 3 A magnified view of part B;

[0022] Figure 5 A bottom cross-sectional view of a fastening bolt structure of a power battery pack with a quick-change function according to the present invention.

[0023] In the figure: 100, fixing assembly; 200, driving assembly; 300, locking assembly; 1, vehicle chassis; 11, power battery pack; 2, cover plate; 21, bolt; 22, positioning column; 23, magnet; 24, iron block; 3, hand wheel; 31, worm; 32, bidirectional screw; 33, worm wheel; 34, internal thread slider; 35, plug plate; 4, spring; 41, round head pin. DETAILED DESCRIPTION

[0024] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments; based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0025] like Figure 1-Figure 5 As shown, the present invention provides a technical solution: a power battery pack fastening bolt structure with a quick-change function, comprising a vehicle chassis 1, a power battery pack 11, a fixing assembly 100, a driving assembly 200 and a locking assembly 300, wherein the power battery pack 11 is located inside the vehicle chassis 1, and the fixing assembly 100, the driving assembly 200 and the locking assembly 300 are located inside the power battery pack 11;

[0026] A battery compartment is provided at the bottom of the vehicle chassis 1 , and a power battery pack 11 is placed in the battery compartment at the bottom of the vehicle chassis 1 . Slots are evenly provided at the front and rear sides of the inner side walls of the battery compartment at the bottom of the vehicle chassis 1 .

[0027] The fixing assembly 100 includes a cover plate 2, a positioning column 22 is evenly fixed on the top of the cover plate 2, a magnetic block 23 is embedded on the top of the positioning column 22, an iron block 24 is magnetically attracted to the top of the magnetic block 23, a countersunk hole is penetrated through the bottom of the cover plate 2, a bolt 21 is rotatably arranged in the countersunk hole, an easy-to-pull groove is opened at the bottom of the cover plate 2, and a group of limit holes are opened on the left and right sides of the bolt 21.

[0028] The driving assembly 200 includes a handwheel 3, a worm 31 is fixedly provided on the top of the handwheel 3, a worm wheel 33 is meshed on the left side of the worm 31, a through hole is penetrated on the front side of the worm wheel 33, a bidirectional screw 32 is fixedly provided in the through hole, and an insertion hole is penetrated at the bottom of the handwheel 3. The worm 31 is driven to rotate by rotating the handwheel 3, and the worm 31 drives the bidirectional screw 32 to rotate through the worm wheel 33.

[0029] The locking assembly 300 includes an internal thread slider 34 , and insert plates 35 are evenly fixedly disposed on opposite sides of two groups of internal thread sliders 34 .

[0030] Two groups of first slide grooves are evenly opened inside the power battery pack 11, and an installation groove is opened between the two groups of first slide grooves. Second slide grooves are evenly opened on the front and rear sides of the power battery pack 11, respectively. The second slide grooves are connected to the installation grooves and correspond to the slots of the automobile chassis 1.

[0031] The worm gear 33 is rotatably arranged in the mounting groove and the first slide groove of the power battery pack 11 through a bearing, the internal thread slider 34 is screwed on the outer side of the worm gear 33 and is slidably arranged in the first slide groove of the power battery pack 11, the plug plate 35 is slidably arranged in the second slide groove of the power battery pack 11 and is inserted into the slot of the automobile chassis 1, and the two groups of internal thread sliders 34 are driven to move outward synchronously by the bidirectional screw rod 32. When the internal thread slider 34 moves, it will drive the plug plate 35 to be inserted into the slot of the automobile chassis 1, so that the power battery pack 11 is fixed in the battery compartment of the automobile chassis 1.

[0032] A square groove is provided at the bottom of the power battery pack 11, a groove and a threaded hole are provided at the top of the inner wall of the square groove, and positioning holes are evenly provided at the top of the inner wall of the square groove. The hand wheel 3 is rotatably arranged in the groove, and the worm 31 is rotatably arranged in the mounting groove of the power battery pack 11 through a bearing. The bottom of the worm 31 passes through the mounting groove and the groove to be connected with the hand wheel 3, and the iron block 24 is embedded in the top of the inner wall of the positioning hole. The cover plate 2 is slidably arranged in the square groove, and the positioning column 22 is inserted into the positioning hole. The bolt 21 passes through the insertion hole of the hand wheel 3 and is screwed with the threaded hole. The bolt 21 passes through the countersunk hole of the cover plate 2 The jack of the handwheel 3 is screwed with the threaded hole, so that the position of the cover plate 2 and the handwheel 3 can be fixed. A group of receiving grooves are opened on the left and right sides of the inner wall of the threaded hole. A spring 4 is fixedly arranged in the receiving groove. A round head plug 41 is fixedly arranged on the outer wall of the spring 4. The round head part of the round head plug 41 is inserted into the limiting hole of the bolt 21. When the bolt 21 is tightened, the round head plug 41 is driven by the spring 4 to insert into the limiting hole of the bolt 21, so that the possibility of the bolt 21 loosening during the bumpy process of the car can be effectively prevented, thereby ensuring the safety of the device.

[0033] A method for using a power battery pack fastening bolt structure with a quick-change function:

[0034] Step 1: Place the power battery pack 11 in the battery compartment at the bottom of the car chassis 1 and turn the hand wheel 3. The hand wheel 3 drives the worm 31 to rotate. The worm 31 drives the bidirectional screw 32 to rotate through the worm wheel 33, thereby driving the two sets of internal thread sliders 34 to move outward synchronously. When the internal thread sliders 34 move, they will drive the plug plate 35 to insert into the slot of the car chassis 1, so that the power battery pack 11 is fixed in the battery compartment of the car chassis 1. At this time, the plug hole of the hand wheel 3 is aligned with the threaded hole in the square groove at the bottom of the power battery pack 11, and the cover is closed. The plate 2 is inserted into the square groove, and the positioning column 22 is inserted into the positioning hole. The cover plate 2 is stabilized in the square groove through the mutual magnetic attraction of the magnetic block 23 and the iron block 24, and then the bolt 21 is passed through the countersunk hole of the cover plate 2 and the insertion hole of the handwheel 3 and screwed together with the threaded hole, so that the position of the cover plate 2 and the handwheel 3 can be fixed. When the bolt 21 is tightened, the round head pin 41 is driven by the spring 4 to be inserted into the limiting hole of the bolt 21, so as to effectively prevent the possibility of the bolt 21 loosening during the bumpy process of the car, thereby ensuring the safety of the device.

[0035] Step 2: When the power battery pack 11 needs to be disassembled, just unscrew the bolt 21 first, and then pull the cover 2 downward through the easy-pull groove at the bottom of the cover 2 to drive the positioning column 22 to separate from the power battery pack 11, and then you can reversely rotate the hand wheel 3 to make the internal threaded slider 34 drive the plug 35 to separate from the slot of the automobile chassis 1, so that the power battery pack 11 can be unlocked from the battery compartment of the automobile chassis 1, and then move the power battery pack 11 downward to complete the disassembly work, thereby achieving the quick replacement effect of the power battery pack 11.

[0036] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0037] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A power battery pack fastening bolt structure with a quick-change function, comprising a vehicle chassis (1), a power battery pack (11), a fixing assembly (100), a driving assembly (200) and a locking assembly (300), characterized in that: The power battery pack (11) is located inside the automobile chassis (1), and the fixing assembly (100), the driving assembly (200) and the locking assembly (300) are located inside the power battery pack (11); A battery compartment is provided at the bottom of the automobile chassis (1), and the power battery pack (11) is placed in the battery compartment at the bottom of the automobile chassis (1). Slots are evenly provided on the front and rear sides of the inner side walls of the battery compartment at the bottom of the automobile chassis (1).

2. A power battery pack fastening bolt structure with quick-change function according to claim 1, characterized in that: The fixing assembly (100) comprises a cover plate (2), the top of the cover plate (2) is evenly provided with positioning columns (22), the top of the positioning columns (22) is inlaid with a magnetic block (23), the top of the magnetic block (23) is magnetically attracted with an iron block (24), the bottom of the cover plate (2) is provided with a countersunk hole, a bolt (21) is provided in the countersunk hole, the bottom of the cover plate (2) is provided with an easy-to-pull groove, and a group of limiting holes are provided on both sides of the left and right sides of the bolt (21).

3. A power battery pack fastening bolt structure with quick-change function according to claim 2, characterized in that: The driving assembly (200) comprises a hand wheel (3), a worm (31) is arranged at the top of the hand wheel (3), a worm wheel (33) is meshed on the left side of the worm (31), a through hole is penetrated through the front side of the worm wheel (33), a bidirectional screw rod (32) is arranged in the through hole, and a plug hole is penetrated through the bottom of the hand wheel (3).

4. A power battery pack fastening bolt structure with quick-change function according to claim 3, characterized in that: The locking assembly (300) comprises an internal thread slider (34), and insert plates (35) are evenly arranged on opposite sides of two groups of the internal thread sliders (34).

5. A power battery pack fastening bolt structure with quick-change function according to claim 4, characterized in that: Two groups of first slide grooves are evenly arranged inside the power battery pack (11), and a mounting groove is connected between the two groups of first slide grooves. Second slide grooves are evenly arranged on the front and rear sides of the power battery pack (11), and the second slide grooves are connected to the mounting grooves and correspond to the slots of the automobile chassis (1).

6. A power battery pack fastening bolt structure with quick-change function according to claim 5, characterized in that: The worm wheel (33) is rotatably arranged in the installation groove and the first slide groove of the power battery pack (11) through a bearing, the internal thread slider (34) is screwed on the outside of the worm wheel (33) and slidably arranged in the first slide groove of the power battery pack (11), and the plug plate (35) is arranged in the second slide groove of the power battery pack (11) and plugged into the slot of the automobile chassis (1).

7. A power battery pack fastening bolt structure with quick-change function according to claim 6, characterized in that: The bottom of the power battery pack (11) is provided with a square groove, the top of the inner side wall of the square groove is provided with a groove and a threaded hole, the top of the inner side wall of the square groove is evenly provided with positioning holes, the hand wheel (3) is arranged in the groove, the worm (31) is arranged in the mounting groove of the power battery pack (11) through a bearing, the bottom of the worm (31) passes through the mounting groove and the groove and is connected to the hand wheel (3), the iron block (24) is embedded in the top of the inner side wall of the positioning hole, the cover plate (2) is arranged in the square groove, the positioning column (22) is inserted in the positioning hole, the bolt (21) passes through the insertion hole of the hand wheel (3) and is screwed with the threaded hole, the inner side wall of the threaded hole is provided with a group of receiving grooves on both sides, a spring (4) is arranged in the receiving groove, the outer side wall of the spring (4) is provided with a round head plug (41), and the round head part of the round head plug (41) is inserted in the limiting hole of the bolt (21).

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