Totally sealed maintenance-free battery pack quick-change lock structure

Abstract

The utility model relates to battery replacement technical field discloses full sealed maintenance -free battery package quick change lock structure, it includes the battery package (100) and frame fixed plate (10) of locking to wait, including outer lock body (1) and inner lock rod (2), outer lock body (1) is fixed on the battery package (100), and inner lock rod (2) is inserted into outer lock body (1) and is matched with it, and the end of inner lock rod (2) that exposes outer lock body (1) is equipped with locking block (21), locking hole (101) on frame fixed plate (10), and inner lock rod (2) rotation drives locking block (21) and locking hole (101) cooperation on. The application can realize quick locking and unlocking of power battery package and vehicle fixed plate, the inside of lock body is completely sealed, can prevent the entry of external impurities, dust and rainwater completely, perfect sealing design runs inside and fills in the grease, reduces the wear and tear of parts, improves the service life, can effectively resist vibration impact, prevents the loosening of lock body.

Description

Technical Field

[0001] This utility model relates to the field of battery replacement technology, and in particular to a quick-change lock structure for a fully sealed, maintenance-free battery pack. Background Technology

[0002] With increasingly frequent domestic and international exchanges and trade, the transportation industry is developing rapidly, including the transport of large and heavy-duty containers. Therefore, various parties have developed bottom fixing structures for these large logistics containers to facilitate quick securing and release during transport. Developing smaller, force-free mechanical locking mechanisms is therefore more suitable for today's increasingly complex securing needs. As shown in the diagram, multiple distributed locking mechanisms effectively achieve stable securing of the logistics container.

[0003] However, due to the inconsistency in working environments, the dust and mud protection functions of the locking mechanism become increasingly important under harsh working conditions. Current mechanical locking mechanisms have structural flaws; the threads are exposed during engagement and disengagement, failing to prevent dust, mud, and other contaminants from contacting the threads. This leads to dirt accumulation, foreign matter buildup, rust, and ultimately, rapid overall failure. Furthermore, under prolonged high and low temperature cycles and immersion in mud, the mechanism is prone to deformation and failure. Dust and mud can enter the locking mechanism, causing structural failure and requiring regular cleaning, maintenance, or replacement. This significantly reduces the battery pack's operating efficiency and increases vehicle maintenance costs.

[0004] Therefore, it is necessary to design a battery pack quick-swap lock that can operate in a fully sealed manner and is maintenance-free throughout its entire life cycle, which will also help the development of battery swapping new energy vehicles. Utility Model Content

[0005] This invention addresses the shortcomings of existing technologies by providing a fully sealed, maintenance-free battery pack quick-change lock structure.

[0006] To solve the above-mentioned technical problems, the present invention provides a solution through the following technical method: The fully sealed, maintenance-free battery pack quick-change lock structure includes a battery pack to be locked and a frame mounting plate. It includes an outer lock body and an inner lock rod installed on the outer lock body. The outer lock body is fixed on the battery pack. The inner lock rod is inserted into the outer lock body and cooperates with it. The end of the inner lock rod that protrudes from the outer lock body is provided with a locking block and a locking hole on the frame mounting plate. The rotation of the inner lock rod drives the locking block to cooperate with the locking hole and lock the battery pack to the frame mounting plate.

[0007] Preferably, the locking block is a rectangular block, the locking hole is a rectangular hole, the locking block and the locking hole are clearance-fitted, and the length of the locking block is greater than the width of the locking hole. When the locking block passes through and is horizontally positioned on the locking hole, locking is achieved; when the locking block is rotated 90°, the locking block can be released from the locking hole, thus releasing the battery pack lock.

[0008] Preferably, the outer lock body has a hollow inner hole, the inner lock rod is inserted into the inner hole and rotates, the inner lock rod has at least one locking guide groove, and the inner wall of the inner hole is equipped with a guide steel ball that cooperates with the locking guide groove; the outer lock body has a steel ball hole that is perpendicular to the inner hole and connects to the inner and outer walls of the outer lock body, and a set screw is also installed in the steel ball hole, and the guide steel ball is fixed in the steel ball hole by the set screw.

[0009] Preferably, the locking guide groove includes a first vertical groove, an inclined groove, and a second vertical groove arranged in sequence. The first vertical groove and the second vertical groove are both arranged parallel to the axis of the inner locking rod. The first vertical groove and the second vertical groove are spaced 90° apart on the cross-sectional projection of the inner locking rod. There are three locking guide grooves, which are circumferentially distributed on the inner locking rod.

[0010] Preferably, the locking block is located at the upper end of the inner locking rod, and the lower end of the inner locking rod is provided with an external thread. It also includes a locking nut sleeve that mates with the thread at the lower end of the inner locking rod. To avoid excessive wear between the locking nut sleeve and the inner wall of the lock body, an interference fit bearing is installed between the locking nut sleeve and the inner hole wall. By controlling the rotation of the locking nut sleeve, the inner locking rod can be rotated. Due to the cooperation between the locking guide groove and the guide ball, the rotating inner locking rod needs to move along the locking guide groove, thereby realizing the 90° rotation of the locking block. In addition, the function of adjusting the extension height of the locking block can be realized through the threaded cooperation between the locking nut sleeve and the inner locking rod.

[0011] Preferably, the device also includes sealing components installed at the upper and lower ends of the inner hole, the sealing components including an upper sealing ring and a lower sealing ring; the upper sealing ring seals between the inner locking rod and the inner hole wall, and the lower sealing ring seals between the locking nut sleeve and the inner hole wall.

[0012] Preferably, it also includes a mounting ring installed on the inner hole, a sealing ring installed between the mounting ring and the inner hole wall, and a lower sealing ring fixed on the inner ring surface of the mounting ring and sealingly engaging with the rod wall of the inner locking rod.

[0013] Preferably, a fixed gear ring is installed at the opening at the lower end of the inner hole, and a check ring that mates with the fixed gear ring is installed at the lower end of the locking nut sleeve. The sleeve also includes a spring fitted on the lower part of the locking nut sleeve. The upper end of the spring presses against the locking nut sleeve, and the lower end of the spring presses against the check ring. The check ring and the fixed gear ring are a pair of meshing bevel gears. The spring force keeps them pressed together and meshing. The check ring has a hexagonal hole in the center, which matches the hexagonal head of the locking nut sleeve. After installation, they can drive each other.

[0014] Preferably, the fixed toothed ring is threadedly fixed to the lower end of the inner hole, and the bottom surface of the check toothed ring has multiple rectangular grooves distributed around its circumference. It also includes a stop plate fixed to the lower end of the outer lock body by screws, with one end of the stop plate stuck in the rectangular groove.

[0015] Preferably, it also includes a retaining ring for a hole that is fitted onto the inner locking rod and snapped into the annular groove on the inner wall of the inner control, the retaining ring for the hole being located above the spring; it also includes a spring seat that is placed above the check ring, and the spring is mounted on the check ring through the spring seat.

[0016] This utility model, by adopting the above technical solutions, has significant technical effects: It enables rapid locking and unlocking of the power battery pack and the vehicle mounting plate; the lock body is completely sealed internally, completely preventing external impurities, dust, and rainwater from entering; the perfect sealing design incorporates internal lubricating grease, protecting the internal mechanisms and precision parts throughout their lifespan, reducing wear, and extending service life; it effectively resists vibration and impact, preventing the lock body from loosening and improving locking reliability; the internal sliding mechanism is guided by steel balls and equipped with self-lubricating bearings, wear-resistant washers, and other components, further enhancing product lifespan. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the structure of this utility model.

[0018] Figure 2 yes Figure 1 A sectional view.

[0019] Figure 3 This is a cross-sectional view of the present invention. Figure I .

[0020] Figure 4 yes Figure 3 A magnified view of a portion of the image.

[0021] Figure 5 This is a cross-sectional view of the present invention. Figure II .

[0022] Figure 6 yes Figure 5 A magnified view of a portion of the image.

[0023] Figure 7 This is a structural diagram of the fixed gear ring and the check gear ring.

[0024] Figure 8 This is a schematic diagram showing the engagement of the unlocking sleeve and the check ring.

[0025] The parts referred to by the numbers in the attached diagram are as follows: 1—Outer lock body, 2—Inner lock rod, 3—Locking nut sleeve, 4—Bearing, 5—Sealing assembly, 6—Fixing toothed ring, 7—Check ring, 8—Spring, 9—Stop plate, 11—Inner hole, 12—Guide steel ball, 13—Steel ball hole, 14—Set screw, 15—Mounting ring, 21—Locking block, 22—Locking guide groove, 221—First vertical groove, 222—Angled groove, 223—Second vertical groove, 23—Elastic retaining ring for hole, 51—Upper sealing ring, 52—Lower sealing ring, 71—Rectangular groove, 72—Unlocking sleeve, 81—Spring seat, 91—Screw, 10—Frame fixing plate, 100—Battery pack, 101—Locking hole. Detailed Implementation

[0026] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments.

[0027] Example 1 The fully sealed, maintenance-free battery pack quick-change lock structure, as shown in the figure, includes a battery pack 100 to be locked and a frame fixing plate 10. It includes an outer lock body 1 and an inner lock rod 2 installed on the outer lock body 1. The outer lock body 1 is fixed on the battery pack 100. The inner lock rod 2 is inserted into the outer lock body 1 and cooperates with it. The end of the inner lock rod 2 that protrudes outside the outer lock body 1 is provided with a locking block 21 and a locking hole 101 on the frame fixing plate 10. The rotation of the inner lock rod 2 drives the locking block 21 to cooperate with the locking hole 101 and lock the battery pack 100 on the frame fixing plate 10.

[0028] The locking block 21 is a rectangular block, and the locking hole 101 is a rectangular hole. The locking block 21 and the locking hole 101 are in clearance fit, and the length of the locking block 21 is greater than the width of the locking hole 101. When the locking block 21 passes through and is horizontally positioned on the locking hole 101, locking is achieved; when the locking block 21 is rotated 90°, the locking block 21 can be released from the locking hole 101, thus releasing the lock on the battery pack 100.

[0029] Example 2 Similar to Embodiment 1, except that the outer lock body 1 has a hollow inner hole 11, the inner lock rod 2 is inserted into the inner hole 11 and rotates, the inner lock rod 2 has at least one locking guide groove 22, and the inner wall of the inner hole 11 is equipped with a guide steel ball 12 that cooperates with the locking guide groove 22; the outer lock body 1 has a steel ball hole 13 that is perpendicular to the inner hole 11 and connects the inner and outer walls of the outer lock body 1, and a set screw 14 is also installed in the steel ball hole 13, and the guide steel ball 12 is fixed in the steel ball hole 13 by the set screw 14.

[0030] The locking guide groove 22 includes a first vertical groove 221, an inclined groove 222, and a second vertical groove 223 arranged in sequence. The first vertical groove 221 and the second vertical groove 223 are both arranged parallel to the axis of the inner locking rod 2. The first vertical groove 221 and the second vertical groove 223 are spaced 90° apart on the cross-sectional projection of the inner locking rod 2. There are three locking guide grooves 22, which are circumferentially distributed on the inner locking rod 2.

[0031] Example 3 Similar to Embodiment 1, except that the fixed block 21 is located at the upper end of the inner locking rod 2, and the lower end of the inner locking rod 2 is provided with an external thread. It also includes a locking nut sleeve 3 that is threaded with the lower end of the inner locking rod 2. In order to avoid excessive wear between the locking nut sleeve 3 and the inner wall of the lock body 1, an interference fit bearing 4 is installed between the locking nut sleeve 3 and the wall of the inner hole 11. By controlling the rotation of the locking nut sleeve 3, the inner locking rod 2 can be driven to rotate. Since the locking guide groove 22 is engaged with the guide steel ball 12, the rotating inner locking rod 2 needs to move along the locking guide groove 22, thereby realizing the 90° rotation of the locking block 21. In addition, the function of adjusting the extension height of the locking block 21 can be realized through the threaded engagement between the locking nut sleeve 3 and the inner locking rod 2.

[0032] It also includes sealing components 5 installed at the upper and lower ends of the inner hole 11. The sealing components 5 include an upper sealing ring 51 and a lower sealing ring 52. The upper sealing ring 51 seals between the inner locking rod 2 and the wall of the inner hole 11, and the lower sealing ring 52 seals between the locking nut sleeve 3 and the wall of the inner hole 11. The upper sealing ring 51 and the lower sealing ring 52 form a complete sealed chamber inside. Before assembly, grease can be filled inside. When the locking nut sleeve 3 and the inner locking rod 1 move, the grease will flow in the gaps between the threaded pair, the wear-resistant washer, the outer locking body 1, the bearing 4, the guide steel ball 12 and the locking guide groove 22, which plays a role in lubrication and cooling, reducing hard friction and wear between steel parts, and greatly improving service life.

[0033] It also includes a mounting ring 15 installed on the inner hole 11, a sealing ring installed between the mounting ring 15 and the wall of the inner hole 11, and a lower sealing ring 52 fixedly installed on the inner ring surface of the mounting ring 15 and sealingly engaging with the rod wall of the inner locking rod 2.

[0034] Example 4 Similar to Embodiment 1, except that a fixed toothed ring 6 is installed at the opening at the lower end of the inner hole 11, and a check ring 7 that mates with the fixed toothed ring 6 is installed at the lower end of the locking nut sleeve 3. It also includes a spring 8 sleeved on the lower part of the locking nut sleeve 3. The upper end of the spring presses against the locking nut sleeve 3, and the lower end of the spring 8 presses against the check ring 7. The check ring 7 and the fixed toothed ring 6 are a pair of meshing bevel gears. They are pressed together by the elastic force of the spring 8. The check ring 7 has a hexagonal hole in the center, which matches the hexagonal head of the locking nut sleeve 3. After being installed, they can drive each other.

[0035] The fixed gear ring 6 is threadedly fixed to the lower end of the inner hole 11. The bottom surface of the check ring 7 has eight rectangular grooves 71 distributed around its circumference. It also includes a stop plate 9 fixed to the lower end of the outer lock body 1 by a screw 91, with one end of the stop plate 9 stuck in the rectangular groove 71. At this time, the inner lock body 2, screw 91, stop plate 9, and fixed gear ring 6 are completely locked. The fixed gear ring 6 restricts the rotation of the check ring 7 through gear meshing and the clamping force of the spring 8, while the check ring restricts the locking through its internal hexagonal hole. The rotation of the nut sleeve 3 is achieved through the aforementioned mechanism, preventing the locking nut sleeve 3 from rotating freely and avoiding loosening and twisting caused by external vibration and impact. When active locking or unlocking is required, the check ring 7 is pushed upward by an unlocking sleeve 72. When its thrust is greater than the preload of the spring 8, the check ring 7 slides upward. At this time, the check ring 7 and the fixed ring 6 disengage, the gears no longer mesh, and the check ring 7 can rotate together with the locking nut 3 to achieve the required locking or unlocking action.

[0036] It also includes a retaining ring 23 for the hole, which is sleeved on the inner locking rod 2 and snapped into the annular groove on the inner wall of the inner control 11. The retaining ring 23 for the hole is located above the spring 8. After being tightened, it forms an axial limit on the mounting ring 15, the composite bearing 4, the locking screw sleeve 3, and the wear-resistant washer. The locking screw sleeve 3 can only rotate within the hole of the outer lock body 1 and cannot move axially. When it rotates, it can drive the inner locking rod 2 to move axially and also to undergo a 90° torsional motion. It also includes a spring seat 81, which is placed above the check ring 7. The spring 8 is mounted on the check ring 7 through the spring seat 81.

[0037] In summary, the above description is only a preferred embodiment of the present utility model. All equivalent changes and modifications made within the scope of the patent application of the present utility model shall fall within the scope of the patent of the present utility model.

Claims

1. A fully sealed, maintenance-free battery pack quick-change lock structure, comprising a battery pack (100) to be locked and a frame fixing plate (10), characterized in that: It includes an outer lock body (1) and an inner lock rod (2) installed on the outer lock body (1). The outer lock body (1) is fixed on the battery pack (100). The inner lock rod (2) is inserted into the outer lock body (1) and cooperates with it. The end of the inner lock rod (2) that protrudes from the outer lock body (1) is provided with a locking block (21). There is a locking hole (101) on the frame fixing plate (10). The inner lock rod (2) rotates to drive the locking block (21) to cooperate with the locking hole (101) and lock the battery pack (100) on the frame fixing plate (10).

2. The fully sealed, maintenance-free battery pack quick-change lock structure according to claim 1, characterized in that: The locking block (21) is a rectangular block, the locking hole (101) is a rectangular hole, the locking block (21) and the locking hole (101) are in clearance fit, and the length of the locking block (21) is greater than the width of the locking hole (101).

3. The fully sealed, maintenance-free battery pack quick-change lock structure according to claim 1, characterized in that: The outer lock body (1) has a hollow inner hole (11). The inner lock rod (2) is inserted into the inner hole (11) and rotates. The inner lock rod (2) has at least one locking guide groove (22). The inner wall of the inner hole (11) is equipped with a guide steel ball (12) that cooperates with the locking guide groove (22). The outer lock body (1) has a steel ball hole (13) that is perpendicular to the inner hole (11) and connects the inner and outer walls of the outer lock body (1). A set screw (14) is also installed in the steel ball hole (13). The guide steel ball (12) is fixed in the steel ball hole (13) by the set screw (14).

4. The fully sealed, maintenance-free battery pack quick-change lock structure according to claim 3, characterized in that: The locking guide groove (22) includes a first vertical groove (221), an inclined groove (222), and a second vertical groove (223) arranged in sequence. The first vertical groove (221) and the second vertical groove (223) are both arranged parallel to the axis of the inner locking rod (2). The first vertical groove (221) and the second vertical groove (223) are spaced 90° apart on the cross-sectional projection of the inner locking rod (2). There are three locking guide grooves (22) and they are circumferentially distributed on the inner locking rod (2).

5. The fully sealed, maintenance-free battery pack quick-change lock structure according to claim 1, characterized in that: The locking block (21) is located at the upper end of the inner locking rod (2). The lower end of the inner locking rod (2) is provided with an external thread. It also includes a locking nut sleeve (3) that is threaded with the lower end of the inner locking rod (2). A bearing (4) is installed between the locking nut sleeve (3) and the wall of the inner hole (11).

6. The fully sealed, maintenance-free battery pack quick-change lock structure according to claim 1, characterized in that: It also includes sealing components (5) installed at the upper and lower ends of the inner hole (11), the sealing components (5) include an upper sealing ring (51) and a lower sealing ring (52); the upper sealing ring (51) seals between the inner locking rod (2) and the wall of the inner hole (11), and the lower sealing ring (52) seals between the locking nut sleeve (3) and the wall of the inner hole (11).

7. The fully sealed, maintenance-free battery pack quick-change lock structure according to claim 6, characterized in that: It also includes a mounting ring (15) installed on the inner hole (11), a sealing ring is installed between the mounting ring (15) and the wall of the inner hole (11), and the lower sealing ring (52) is fixed on the inner ring surface of the mounting ring (15) and seals with the rod wall of the inner locking rod (2).

8. The fully sealed, maintenance-free battery pack quick-change lock structure according to claim 1, characterized in that: A fixed toothed ring (6) is installed at the opening at the lower end of the inner hole (11). A check toothed ring (7) that cooperates with the fixed toothed ring (6) is installed at the lower end of the locking nut sleeve (3). A spring (8) is also included, which is sleeved on the lower part of the locking nut sleeve (3). The upper end of the spring is pressed on the locking nut sleeve (3), and the lower end of the spring (8) is pressed on the check toothed ring (7).

9. The fully sealed, maintenance-free battery pack quick-change lock structure according to claim 8, characterized in that: The fixed toothed ring (6) is threadedly fixed to the lower end of the inner hole (11). The bottom surface of the check toothed ring (7) has multiple rectangular grooves (71) distributed around its circumference. It also includes a stop plate (9) fixed to the lower end of the outer lock body (1). The stop plate (9) is stuck in the rectangular groove (71).

10. The fully sealed, maintenance-free battery pack quick-change lock structure according to claim 8, characterized in that: It also includes a retaining ring (23) for the hole, which is sleeved on the inner locking rod (2) and snapped into the annular groove on the inner wall of the inner hole (11). The retaining ring (23) for the hole is located above the spring (8). It also includes a spring seat (81), which is placed above the check ring (7). The spring (8) is mounted on the check ring (7) through the spring seat (81).

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