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EP-4389542-B1 - QUICK LOCK-CHANGING ASSEMBLY AND LOCKING DEVICE USING SAME

EP4389542B1EP 4389542 B1EP4389542 B1EP 4389542B1EP-4389542-B1

Inventors

  • ZHANG, WENHUI
  • YOU, SHUBING
  • YE, Qingfeng
  • WU, Yuanhe

Dates

Publication Date
20260506
Application Date
20210927

Claims (11)

  1. A nut assembly (200), comprising: a quick-change nut (207), comprising a nut body (211), a through threaded hole (219) being formed in the nut body (211); a locking mechanism (205), a locking concave portion (305) being provided on the side, opposite to the threaded hole (219), of the locking mechanism (205), and second anti-loosening teeth (307) being formed on the inner surface of the locking concave portion (305); an elastic member (203), matched with the locking mechanism (205) to make the locking mechanism (205) approach the quick-change nut (207); a cover plate (201); and a base (209), the cover plate (201) being fixedly connected to the base (209), and an accommodating space being formed between the cover plate (201) and the base (209); wherein the accommodating space is configured to allow the quick-change nut (207) to move within a predetermined range; characterized in that the quick-change nut (207) further comprises a cap portion (213) connected to the nut body (211), the cap portion (213) is arranged in the accommodating space, an opening from which the nut body (211) protrudes is formed in the base (209), and in that protrusions (215) are formed on the cap portion (213), and snap grooves (217) snapped with the protrusions (215) are formed in the locking mechanism (205).
  2. The nut assembly (200) according to claim 1, wherein, a guide portion (227) is formed on the side, opposite to the cover plate (201), of the locking mechanism (205), and a guide hole (229) matched with the guide portion (227) is formed in the cover plate (201), the elastic member (203) sleeves the guide portion (227), and both ends of the elastic member (203) respectively abut against the cover plate (201) and the locking mechanism (205).
  3. The nut assembly (200) according to claim 1 or 2, wherein, a flanging (225) is provided on the base (209) and/or the cover plate (201), and the flanging (225) is configured to limit the rotation of the quick-change nut (207) relative to the base (209) and/or the cover plate (201).
  4. A locking device (300), comprising: the nut assembly (200) according to any one of claims 1-3; and a quick-change lock assembly (100), comprising: a shell (101) with a hollow cavity formed therein; a quick-change bolt (103) arranged in the cavity, wherein the quick-change bolt (103) comprises a guide section (113), a threaded fixing section (115), a flange portion (117) and a tool matching section (119), a through hole (301) is formed in the quick-change bolt (103) along the axial direction, first anti-loosening teeth (121) are formed on the guide section (113), and the first anti-loosening teeth (121) are enabled to be locked to limit the rotation of the quick-change bolt (103); an unlocking mandrel (105) configured to be inserted and retained in the through hole (301), wherein the length of the unlocking mandrel (105) is greater than the length of the through hole (301), and when an external tool is inserted into the tool matching section (119), the external tool is capable of pushing the unlocking mandrel (105) to move along the through hole (301) and protrude from the guide section (113) to remove the locking of the first anti-loosening teeth (121); and a bolt fixing ring (107) fixed to the shell (101) and configured to stop the flange portion (117); wherein the quick-change bolt (103) is configured such that, when the quick-change bolt (103) is tightened with the quick-change nut (207), the guide section (113) passes through the threaded hole (219) of the quick-change nut (207) and abuts against the inner surface of the locking concave portion (305), and wherein the second anti-loosening teeth (307) are adapted to be engaged with the first anti-loosening teeth (121) for locking or disengaged from the same for unlocking.
  5. The locking device (300) according to claim 4, wherein, the first anti-loosening teeth (121) and the second anti-loosening teeth (307) are inclined toothed structures.
  6. The locking device (300) according to claim 5, wherein, the angle of inclination of the first anti-loosening teeth (121) and the second anti-loosening teeth (307) is 30°-60°.
  7. The locking device (300) according to any one of claims 4-6, wherein, the guide section (113) is frustum-shaped, and the first anti-loosening teeth (121) are arranged on the conical surface of the guide section (113).
  8. The locking device (300) according to any one of claims 4-7, wherein, a boss (111) is formed at the top of the shell (101), and the outer ring of the boss (111) has a toothed structure.
  9. The locking device (300) according to any one of claims 4-8, wherein, a step portion (127) is formed on the inner side of the bolt fixing ring (107), and the step portion (127) stops the flange portion (117).
  10. The locking device (300) according to any one of claims 4-9, wherein, the unlocking mandrel (105) is provided with a head portion (123) and a thin neck portion (125), wherein a protruding portion (303) is formed on the inner wall of the through hole (301), the head portion (123) is configured to be matched with the protruding portion (303) to retain the unlocking mandrel (105) in the through hole (301), and the thin neck portion (125) is configured to move freely through the protruding portion (303).
  11. A vehicle, comprising: a battery pack beam (404) with a hole formed therein; a vehicle body beam (402) with a groove (408) formed therein; and the locking device (300) according to any one of claims 1-10, wherein the nut assembly (200) is fixed into the groove (408) of the vehicle body beam (402), and the quick-change lock assembly (100) is fixed into the hole of the battery pack beam (404).

Description

Technical Field The present application relates to the technical field of locking, and more particularly relates to a quick-change lock assembly for a battery and a locking device using the same. Background Art In recent years, with the rapid development of new energy vehicles, the global sales of new energy vehicles have continued to grow. However, the charging time of the power battery of the new energy vehicle is long, and such problem is generally solved by adopting a method for quickly changing the power battery. According to such battery change mode, the purpose of supplementing electric energy of the new energy vehicle is achieved by directly changing the battery pack of the new energy vehicle, rapid electric energy supplement can be achieved, and meanwhile, battery maintenance and prolonging of the service life are facilitated. However, a current locking device for locking the battery pack to the vehicle body requires a large amount of space. Therefore, it is desirable to provide a locking device, which requires less space, can achieve high fastening performance, and has an anti-loosening structure with high reliability. In the prior art, elements of locking devices of the generic kind are disclosed in US 4,191,236 A, US 2,976,901 A, US 3,404,716 A, US 2018/135679 A1, EP 3 466 734 A1, US 2012/099943 A1 and CN 109 515 148 A. Summary of the Invention The present application provides a locking device using a quick-change lock assembly. In a first aspect, provided is a nut assembly, comprising: a quick-change nut comprising a nut body, a through threaded hole being formed in the nut body; a locking mechanism, a locking concave portion being provided on the side, opposite to the threaded hole, of the locking mechanism, and second anti-loosening teeth being formed on the inner surface of the locking concave portion; and an elastic member matched with the locking mechanism to make the locking mechanism approach the quick-change nut. According to the configuration of the nut assembly of the present application, the installation space needed by the locking device can be greatly reduced, and meanwhile, high fastening performance as well as anti-loosening and anti-rotation performance with high reliability can be achieved. The nut assembly further comprises: a cover plate; and a base, the cover plate being fixedly connected to the base, and an accommodating space being formed between the cover plate and the base; wherein the quick-change nut further comprises a cap portion connected to the nut body, the cap portion is arranged in the accommodating space, an opening from which the nut body protrudes is formed in the base, and the accommodating space is configured to allow the quick-change nut to move within a predetermined range. By means of such configuration, when the axis of the quick-change bolt and the axis of the quick-change nut are not in a straight line, the quick-change bolt and the quick-change nut can be better aligned. In some embodiments, a guide portion is formed on the side, opposite to the cover plate, of the locking mechanism, and a guide hole matched with the guide portion is formed in the cover plate, the elastic member sleeves the guide portion, and both ends of the elastic member respectively abut against the cover plate and the locking mechanism. By means of such configuration, movement of the locking mechanism can be guided, and the elastic member can be positioned. In some embodiments, a flanging is provided on the base and/or the cover, and the flanging is configured to limit the rotation of the quick-change nut relative to the base and/or the cover plate. Through arrangement of the flanging, when the quick-change bolt and the quick-change nut are tightened, the quick-change nut can be prevented from rotating relative to the base and/or the cover plate. Protrusions are formed on the cap portion, and snap grooves snapped with the protrusions are formed on the locking mechanism. By means of such configuration, the locking mechanism can be positioned to prevent the locking mechanism from rotating relative to the quick-change nut. In a second aspect, provided is a locking device comprising: the nut assembly as described above, and a quick-change lock assembly. The quick-change lock assembly comprises: a shell with a hollow cavity formed therein; a quick-change bolt arranged in the cavity, wherein the quick-change bolt comprises a guide section, a threaded fixing section, a flange portion and a tool matching section, a through hole is formed in the quick-change bolt along the axial direction, first anti-loosening teeth are formed on the guide section, and the first anti-loosening teeth can be locked to limit the rotation of the quick-change bolt; an unlocking mandrel configured to be inserted and retained in the through hole, wherein the length of the unlocking mandrel is greater than the length of the through hole, and when an external tool is inserted into the tool matching section, the e