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EP-4421961-B1 - FASTENING STRUCTURE, BATTERY BOX AND BATTERY

EP4421961B1EP 4421961 B1EP4421961 B1EP 4421961B1EP-4421961-B1

Inventors

  • HUANG, ZHIJIE
  • MIAO, Huimin
  • YU, Xiaoyin

Dates

Publication Date
20260506
Application Date
20230215

Claims (14)

  1. A fastening structure (100), configured to fasten a first object and a second object and wherein the fastening structure (100) comprises: a first fastener (10) capable of being fixed on the first object, wherein the first fastener (10) has a first fastening portion (11); a second fastener (20) detachably connected to the first fastener (10), wherein the second fastener (20) has a second fastening portion (21) and a fitting portion (22); and a locking member (30) capable of being fixed on the first object or the second object; wherein when the second fastener (20) is connected to the first fastener (10), the second fastening portion (21) is fitted with the first fastening portion (11), and the second fastener (20) operably rotates relative to the first fastener (10) to drive the first object to move toward the second object; and the second fastener (20) is configured to lock the fitting portion (22) into the locking member (30) in a rotation process; characterized in that the second fastener (20) comprises a handle portion (25), the handle portion (25) is connected to the second fastening portion (21), and the fitting portion (22) is disposed on the handle portion (25).
  2. The fastening structure (100) according to claim 1, wherein one of the first fastening portion (11) and the second fastening portion (21) comprises a fastening groove, the other one comprises a fastening bulge, and the fastening groove is fitted with the fastening bulge.
  3. The fastening structure (100) according to claim 2, wherein the fastening groove comprises a tooth trough, and the fastening bulge comprises a tooth portion engaged with the tooth trough.
  4. The fastening structure (100) according to any one of claims 1 to 3, wherein the first fastening portion (11) comprises a rack, and the second fastening portion (21) comprises a cog engaged with the rack.
  5. The fastening structure (100) according to any one of claims 1 to 4, wherein the fastening structure (100) further comprises a rotating shaft (40), and the second fastener (20) is rotatively connected to the second object through the rotating shaft (40) to rotate relative to the first fastener (10).
  6. The fastening structure (100) according to claim 5, wherein a shaft hole (23) is opened in the second fastener (20), one end of the rotating shaft (40) is capable of being fixedly connected to the second object, and another end of the rotating shaft (40) is passed through the shaft hole (23) to be rotatively connected to the second fastener (20).
  7. The fastening structure (100) according to claim 6, wherein the fastening structure (100) further comprises a restraint member (50), and the restraint member (50) is connected to one end of the rotating shaft (40) that is farther away from the second object to fit with the second object to form a restraint space capable of axially restricting the second fastener (20).
  8. The fastening structure (100) according to claim 7, wherein the rotating shaft (40) is integrally formed with the restraint member (50), and the rotating shaft (40) is detachably connected to the second object.
  9. The fastening structure (100) according to any one of claims 1 to 8, wherein the locking member (30) is convexly disposed on an outer surface of the first object or the second object.
  10. The fastening structure (100) according to claim 9, wherein the fitting portion (22) comprises a locking groove, and the locking groove is fitted with the locking member (30) to implement locking, preferably wherein the locking groove penetrates through the second fastener (20).
  11. The fastening structure (100) according to claim 9, wherein the fitting portion (22) is elastic, and the fitting portion (22) is capable of abutting against the locking member (30) before locking, so that the fitting portion (22) deforms and is capable of recovering from deformation when locked into the locking member (30).
  12. The fastening structure (100) according to any one of claims 1 to 11, wherein the fastening structure (100) further comprises a guide member (60), the guide member (60) is capable of being fixed on the first object or the second object, a gap is formed between the guide member (60) and the first object or the second object to form a guide space, and the second fastener (20) is capable of being passed through the guide space in a rotation process to guide the second fastener (20) to rotate, preferably wherein the fitting portion (22) and the second fastening portion (21) are spaced apart, and the guide space is capable of guiding the second fastener (20) to rotate between the fitting portion (22) and the second fastening portion (21).
  13. A battery box (200) comprising a box cover (210) and a box body (220), wherein the battery box (200) further comprises the fastening structure (100) according to any one of claims 1 to 12, and the fastening structure (100) is configured to fasten the box cover (210) and the box body (220).
  14. A battery (1000), characterized by comprising the battery box (200) according to claim 13.

Description

TECHNICAL FIELD This application relates to the technical field of batteries, and in particular, to a fastening structure, a battery box, and a battery. BACKGROUND A battery is a core of energy supply for an electric vehicle. Service life and safety performance of the electric vehicle are both closely associated with the battery. Therefore, extremely strict requirements are imposed on a protection ability of a battery box for accommodating the battery cell, and particularly, increasingly higher requirements are imposed on waterproof and dustproof grades of the battery box. To satisfy the dustproof and waterproof requirements, for any existing battery, a sealing structure needs to be disposed between a box body and a box cover, and then a fastening structure such as that disclosed in JP2007105281 is used for tightening and pressing, to achieve a sealing effect. However, for small-sized batteries such as 12 V batteries and batteries of two-wheeled electric vehicles, a disposition space of the fastening structure is limited, resulting in a poor fastening effect. SUMMARY In view of the foregoing problems, this application provides a fastening structure, a battery box, and a battery, which can resolve a problem of a poor fastening effect caused because a disposition space of a fastening structure is limited in a small-sized battery. According to a first aspect, this application provides a fastening structure according to claim 1, configured to fasten a first object and a second object, where the fastening structure includes: a first fastener capable of being fixed on the first object, where first fastener has a first fastening portion;a second fastener detachably connected to the first fastener, where the second fastener has a second fastening portion and a fitting portion; anda locking member capable of being fixed on the first object or the second object;where when the second fastener is connected to the first fastener, the second fastening portion is fitted with the first fastening portion, and the second fastener operably rotates relative to the first fastener to drive the first object to move toward the second object; andthe second fastener is configured to lock the fitting portion into the locking member in a rotation process. Based on the foregoing fastening structure, due to rotation of the second fastener, the first fastener can drive the entire first object to move toward the second object, and therefore, the first object and the second object are under uniform stress, so that a curling phenomenon can be avoided for a sealing structure disposed between the first object and the second object, thereby implementing a good sealing effect on the first object and the second object. In addition, because the first fastener, the second fastener, and the locking member are additionally disposed outside the first object and the second object, the structure is compact, and therefore, no hole or trough needs to be opened in the first object and the second object, thereby implementing high structure stability for the first object and the second object. In some embodiments, one of the first fastening portion and the second fastening portion includes a fastening groove, the other one includes a fastening bulge, and the fastening groove is fitted with the fastening bulge. A fitting manner is set for the fastening groove and the fastening bulge, so that the fitting manner of the first fastening portion and the second fastening portion is simple, thereby simplifying an operation process of the second fastener. In some embodiments, the fastening groove includes a tooth trough, and the fastening bulge includes a tooth portion engaged with the tooth trough. The fitting manner of the tooth trough and the tooth portion is more reliable than a fitting manner of another groove and a bulge, and the first fastener can be steadily driven to move during the rotation of the second fastener, thereby further improving stress uniformity of the sealing structure between the first object and the second object. In some embodiments, the first fastening portion includes a rack, and the second fastening portion includes a cog engaged with the rack. An engagement manner is set for the cog and the rack, so that the cog can be rotated during the rotation of the second fastener to further drive the rack engaged with the cog to move linearly, and the first object can steadily move toward the second object, thereby further improving the stress uniformity of the sealing structure between the first object and the second object. In some embodiments, the fastening structure further includes a rotating shaft, and the second fastener is rotatively connected to the second object through the rotating shaft to rotate relative to the first fastener. The rotating shaft is disposed and rotatively connected to the second object, to provide a supporting point for the rotation of the second fastener relative to the first fastener, so that the rotation process is