A locking device with a limiting mechanism

Abstract

The present invention relates to a locking device with a limiting mechanism, comprising a first lock body, a locking assembly and a second lock body; the locking assembly comprises a locking shell, a driving rod and a locking piece, the locking shell has a locking hole, the driving rod is located in the locking shell cavity and drives the locking piece to extend or retract relative to the locking hole; a limiting sleeve is provided in the locking shell, the limiting sleeve is provided with a sleeve through hole, the locking assembly also includes a lifting ball, the lifting ball is provided at the upper end of the driving rod, and the inner diameter of the limiting sleeve is smaller than the outer diameter of the lifting ball. The present invention provides a locking device with a limiting mechanism for limiting the position of a large ball. The technical problem that the large ball is easily detached from the locking mechanism when the driving rod is unscrewed during the replacement process in the prior art is solved, resulting in the loss of parts.

Description

Technical Field

[0001] The invention relates to the field of electric vehicles, and in particular to a locking device with a limiting mechanism. Background Art

[0002] The current electric vehicle power battery power supply methods are generally divided into two methods: plug-in charging with the car and replacing the battery. The plug-in charging method has two modes: slow charging and fast charging. The plug-in charging method has the following defects: 1. The initial investment cost of the battery is relatively large, which to a certain extent hinders the popularization of electric vehicles; 2. The charging time is too long, at least 2 to 4 hours. Compared with the refueling of ordinary cars, the time spent on electric vehicles to replenish energy is too long, which is very inconvenient and far from meeting people's needs. The fast charging mode will cause great damage to the battery, resulting in a shortened battery life. The use of battery replacement can effectively avoid the problems of the plug-in charging method. It has developed in recent years, and various battery boxes and battery frame structures have also appeared accordingly.

[0003] The key to achieving fast battery replacement for electric vehicles lies in the design of the battery replacement locking mechanism. The main function of the battery replacement lock is to keep the body and the battery pack firmly connected when the battery is not being replaced; and to quickly connect and separate the body and the battery pack when the battery is being replaced.

[0004] The prior art provides a locking structure, which is achieved by lifting a large ball through a driving rod (preferably a screw rod), and the large ball drives a small locking ball to extend out of the surface of the locking shell to achieve locking. Such a locking structure is more convenient to operate and has a stable structure after locking. However, the structure has the following technical problems:

[0005] The driving rod often wears out during use. Therefore, after a period of use, the driving rod needs to be replaced. During the replacement process, when the driving rod is unscrewed, the large ball is easily detached from the locking mechanism, resulting in the loss of parts.

[0006] Therefore, it is necessary to provide a locking device that can effectively prevent the large ball from falling off during the process of replacing the driving rod to solve the above technical problems. Summary of the invention

[0007] In order to solve the above technical problems, the present invention provides a locking device with a limiting mechanism for limiting the position of a large ball, thereby solving the technical problem in the prior art that when the driving rod is unscrewed during the replacement process, the large ball is easily separated from the locking mechanism, resulting in the loss of parts.

[0008] The technical effects of the present invention are achieved as follows:

[0009] A locking device with a limiting mechanism comprises a first lock body, a locking assembly and a second lock body;

[0010] The locking assembly comprises a locking shell, a driving rod and a locking member, wherein the first lock body is sleeved on one end of the locking shell, the second lock body has a second lock body through hole, the locking shell is partially disposed in the second lock body through hole, and the locking shell and the second lock body are relatively fixed in the axial direction;

[0011] The locking housing has a locking hole, the driving rod is located in the locking housing cavity and drives the locking member to extend or retract relative to the locking hole; when the locking member extends relative to the locking hole, the first lock body is locked relative to the locking housing, and when the locking member retracts relative to the locking hole, the first lock body is disengaged relative to the locking housing;

[0012] A limiting sleeve is provided in the locking shell, and the limiting sleeve is provided with a sleeve through hole. The locking assembly also includes a lifting ball, and the lifting ball is provided at the upper end of the driving rod. The inner diameter of the limiting sleeve is smaller than the outer diameter of the lifting ball. The limiting sleeve is mainly used for unlocking the locking mechanism. When the lifting ball reaches the contact point between the lifting ball and the limiting sleeve, the driving rod continues to move downward. The lifting ball cannot continue to move downward due to the limiting effect of the limiting sleeve. The locking member is limited in the cavity formed by the lifting ball and the locking shell, and will not be separated.

[0013] Furthermore, the inner cavity of the locking shell has a threaded section, and the driving rod is threadably connected to the threaded section.

[0014] Furthermore, the outer surface of the limiting sleeve is threadedly connected with the threaded section. Therefore, the limiting sleeve can be detachably installed in the inner cavity of the locking shell, which is convenient for the installation of various parts, and the limiting sleeve can adjust the height of the limit through the thread setting.

[0015] Furthermore, the locking shell is provided with a sleeve limiter, which passes through the housing of the locking shell and enters the inner cavity of the locking shell to limit the limit sleeve. The sleeve limiter is a limit pin screwed on the locking shell. Tightening the limit pin can effectively prevent the limit sleeve from loosening.

[0016] Furthermore, the driving rod further comprises a lifting section and a driving section, and the inner diameter of the sleeve through hole is greater than or equal to the outer diameter of the lifting section and smaller than the outer diameter of the driving section. Therefore, the limiting sleeve can allow the driving rod to pass through and limit the lifting distance of the driving rod at the same time.

[0017] Specifically, an elastic member is provided between the lifting ball and the top end of the inner cavity of the locking shell.

[0018] Specifically, the locking shell has a first shell section and a second shell section, the locking hole is provided on the first shell section, the outer diameter of the first shell section is smaller than the outer diameter of the second shell section, the first lock body has a lock body inner cavity, the lock body inner cavity is sleeved on one end of the first shell section, and a locking boss is provided on one section of the lock body inner cavity. When the locking member extends out of the locking hole, the maximum distance from the outer surface of the locking member to the axis of the locking shell is greater than the inner diameter of the locking boss. An annular groove is provided on the outer surface of the first shell section, a sealing ring is provided in the annular groove, and the inner surface of the locking boss is sealed and connected to the outer surface of the first shell section through the sealing ring. A sealing structure is provided between the locking device and one of the locking connectors to prevent dust or liquid from entering the lock body and making the lock body ineffective.

[0019] Specifically, the first and second limiting bosses are respectively provided at both ends of the second lock body through hole, and the inner diameter of the first limiting boss and the inner diameter of the second limiting boss are both smaller than the outer diameter of the second housing segment; there is a gap between the inner surface of the second housing segment and the inner surface of the second lock body through hole. On one of the locking connectors, a floating gap is reserved between the locking device and the locking connector body in the X and Y directions, so that the locking device can move in the X and Y directions within the locking connector body, thereby achieving the floating purpose of the battery replacement lock body.

[0020] As described above, the present invention has the following beneficial effects:

[0021] 1) The limiting sleeve is mainly used for unlocking the locking mechanism. When the lifting ball reaches the contact point between the lifting ball and the limiting sleeve, the driving rod continues to move downward. The lifting ball cannot continue to move downward due to the limiting effect of the limiting sleeve. The locking piece is limited in the cavity formed by the lifting ball and the locking shell and will not be separated.

[0022] 2) Setting a limit pin can effectively prevent the limit sleeve from loosening.

[0023] 3) An elastic member is provided between the lifting ball and the top end of the inner cavity of the locking housing, which can cooperate with the limiting sleeve to more stably limit the lifting ball during the separation process of the lifting rod.

[0024] 4) The limit sleeve is connected to the inner cavity of the locking shell through threads, which can facilitate the installation and disassembly of parts and at the same time adjust the limit height.

[0025] 5) On one of the locking connectors, a floating gap is reserved between the locking device and the locking connector body in the X and Y directions, so that the locking device can move in the X and Y directions within the locking connector body, thereby achieving the purpose of floating the battery-changing lock body.

[0026] 6) A sealing structure is provided between the locking device and one of the locking connectors to prevent dust or liquid from entering the lock body and rendering the lock body ineffective. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] In order to more clearly illustrate the technical solution of the present invention, the following briefly introduces the drawings required for use in the embodiments or prior art descriptions. Obviously, the drawings described below are only some embodiments of the present invention, and those skilled in the art can obtain other drawings based on these drawings without creative work.

[0028] Figure 1 A cross-sectional view of the overall structure of an embodiment of the present application;

[0029] Figure 2 This is a schematic diagram of the internal structure of the locking assembly of an embodiment of the present application;

[0030] Figure 3 This is a cross-sectional view of the locking assembly according to an embodiment of the present application.

[0031] Among them, the reference numerals in the figure correspond to:

[0032] 1. First lock body; 11. Lock body inner cavity; 12. Locking boss; 2. Locking assembly; 21. Locking shell; 211. First shell section; 212. Second shell section; 22. Driving rod; 221. Lifting section; 222. Driving section; 23. Locking member; 24. Limiting sleeve; 25. Sleeve limiting member; 26. Lifting ball; 27. Elastic member; 28. Sealing ring; 3. Second lock body; 31. Second lock body through hole; 32. First limiting boss; 33. Second limiting boss. DETAILED DESCRIPTION

[0033] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of 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.

[0034] Embodiment 1:

[0035] A locking device with a limiting mechanism, comprising a first lock body 1, a locking assembly 2 and a second lock body 3;

[0036] The locking assembly 2 includes a locking housing 21, a driving rod 24

[0037] and a locking member, wherein the first lock body 2 is sleeved on one end of the locking shell 21, the second lock body 3 has a second lock body through hole 31, the locking shell 21 is partially disposed in the second lock body through hole 31, and the locking shell 21 and the second lock body are relatively fixed in the axial direction;

[0038] The locking housing 21 has a locking hole, and the driving rod 22 is located in the cavity of the locking housing 21 and drives the locking member 23 to extend or retract relative to the locking hole; when the locking member 23 extends relative to the locking hole, the first lock body 1 is locked relative to the locking housing 21, and when the locking member 23 retracts relative to the locking hole, the first lock body 1 is disengaged relative to the locking housing 21;

[0039] A limiting sleeve 24 is provided in the locking housing 21, and a sleeve through hole is provided in the limiting sleeve 24. The locking assembly 2 also includes a lifting ball 26, and the lifting ball 26 is provided at the upper end of the driving rod 22. The inner diameter of the limiting sleeve 24 is smaller than the outer diameter of the lifting ball 26. The limiting sleeve is mainly used for unlocking the locking mechanism. When the lifting ball reaches the contact point between the lifting ball and the limiting sleeve, the driving rod continues to move downward. The lifting ball cannot continue to move downward due to the limiting effect of the limiting sleeve. The locking member is limited in the cavity formed by the lifting ball and the locking housing, and will not be separated.

[0040] The inner cavity of the locking shell 21 has a threaded section, and the driving rod 22 is threadedly connected to the threaded section. The outer surface of the limiting sleeve 24 is threadedly connected to the threaded section. The limiting sleeve is threadedly connected to the inner cavity of the locking shell, which can facilitate the installation and disassembly of parts and adjust the height of the limit.

[0041] The locking housing 21 is provided with a sleeve limiting member 25 , which passes through the housing of the locking housing 21 and enters the inner cavity of the locking housing 21 to limit the limiting sleeve 24 . The sleeve limiting member 25 is a limiting pin screwed on the housing of the locking housing 21 .

[0042] The driving rod 22 further includes a lifting section 221 and a driving section 222 . The inner diameter of the sleeve through hole is greater than or equal to the outer diameter of the lifting section 221 and smaller than the outer diameter of the driving section 222 .

[0043] An elastic member 27 is provided between the lifting ball 26 and the top of the inner cavity of the locking shell 21. Specifically, in this embodiment, the elastic member is a return spring. By providing an elastic member between the lifting ball and the top of the inner cavity of the locking shell, it can cooperate with the limiting sleeve to more stably limit the lifting ball during the lifting rod separation process.

[0044] The locking housing 21 has a first housing section 211 and a second housing section 212. The locking hole is provided on the first housing section 211. The outer diameter of the first housing section 211 is smaller than the outer diameter of the second housing section 212. The first lock body 1 has a lock body inner cavity 11. The lock body inner cavity 11 is sleeved on one end of the first housing section 211. A locking boss 12 is provided on one section of the lock body inner cavity 11. When the locking member 23 extends out of the locking hole, the maximum distance from the outer surface of the locking member 23 to the axis of the locking housing 21 is greater than the inner diameter of the locking boss 12. An annular groove is provided on the outer surface of the first housing section 211. A sealing ring 28 is provided in the annular groove. The inner surface of the locking boss 12 is sealed and connected to the outer surface of the first housing section 211 through the sealing ring 28.

[0045] A first limiting boss 32 and a second limiting boss 33 are respectively provided at both ends of the second lock body through hole 31. The inner diameter of the first limiting boss 32 and the inner diameter of the second limiting boss 33 are both smaller than the outer diameter of the second shell section 212; there is a gap between the inner surface of the second shell section 212 and the inner surface of the second lock body through hole 31.

[0046] Embodiment 2:

[0047] The difference from the first embodiment is that an elastic member 27 is provided between the lifting ball 26 and the top end of the inner cavity of the locking housing 21. Specifically, in the present embodiment, the elastic member is an elastic washer or foam rubber.

[0048] Through the above specific embodiments, the following technical effects are achieved:

[0049] 1) The limiting sleeve is mainly used for unlocking the locking mechanism. When the lifting ball reaches the contact point between the lifting ball and the limiting sleeve, the driving rod continues to move downward. The lifting ball cannot continue to move downward due to the limiting effect of the limiting sleeve. The locking piece is limited in the cavity formed by the lifting ball and the locking shell and will not be separated.

[0050] 2) Setting a limit pin can effectively prevent the limit sleeve from loosening.

[0051] 3) An elastic member is provided between the lifting ball and the top end of the inner cavity of the locking housing, which can cooperate with the limiting sleeve to more stably limit the lifting ball during the separation process of the lifting rod.

[0052] 4) The limit sleeve is connected to the inner cavity of the locking shell through threads, which can facilitate the installation and disassembly of parts and at the same time adjust the limit height.

[0053] 5) On one of the locking connectors, a floating gap is reserved between the locking device and the locking connector body in the X and Y directions, so that the locking device can move in the X and Y directions within the locking connector body, thereby achieving the purpose of floating the battery-changing lock body.

[0054] 6) A sealing structure is provided between the locking device and one of the locking connectors to prevent dust or liquid from entering the lock body and rendering the lock body ineffective.

[0055] In this document, the directional words such as front, back, top, and bottom are defined by the positions of the components in the drawings and the positions of the components relative to each other, and are only for the sake of clarity and convenience in expressing the technical solution. It should be understood that the use of the directional words should not limit the scope of protection claimed in this application.

[0056] In the absence of conflict, the above embodiments and features in the embodiments can be combined with each other.

[0057] The above disclosure is only a preferred embodiment of the present invention, which certainly cannot be used to limit the scope of the present invention. Therefore, equivalent changes made according to the claims of the present invention are still within the scope of the present invention.

Claims

1. A locking device with a limiting mechanism, characterized in that: It comprises a first lock body (1), a locking assembly (2) and a second lock body (3); The locking assembly (2) comprises a locking shell (21), a driving rod (22) and a locking member (23); the first lock body (1) is sleeved on one end of the locking shell (21); the second lock body (3) has a second lock body through hole (31); the locking shell (21) is partially disposed in the second lock body through hole (31); and the locking shell (21) and the second lock body are relatively fixed in the axial direction; The locking shell (21) has a locking hole, and the driving rod (22) is located in the cavity of the locking shell (21) and drives the locking member (23) to extend or retract relative to the locking hole; when the locking member (23) extends relative to the locking hole, the first lock body (1) is locked relative to the locking shell (21); when the locking member (23) retracts relative to the locking hole, the first lock body (1) is disengaged relative to the locking shell (21); A limiting sleeve (24) is provided in the locking housing (21), and the limiting sleeve (24) is provided with a sleeve through hole. The locking assembly (2) further comprises a lifting ball (26), and the lifting ball (26) is arranged at the upper end of the driving rod (22). The inner diameter of the limiting sleeve (24) is smaller than the outer diameter of the lifting ball (26); The locking shell (21) is provided with a sleeve limiting member (25), and the sleeve limiting member (25) passes through the shell of the locking shell (21) and enters the inner cavity of the locking shell (21) to limit the position of the limiting sleeve (24); The inner cavity of the locking housing (21) has a threaded section, and the driving rod (22) is threadably connected to the threaded section.

2. A locking device with a limiting mechanism according to claim 1, characterized in that: The outer surface of the limiting sleeve (24) is threadably connected to the threaded section.

3. A locking device with a limiting mechanism according to claim 1, characterized in that: The sleeve limiting member (25) is a limiting pin screwed onto the housing of the locking shell (21).

4. A locking device with a limiting mechanism according to claim 1, characterized in that: The driving rod (22) further comprises a lifting section (221) and a driving section (222); the inner diameter of the sleeve through hole is greater than or equal to the outer diameter of the lifting section (221) and smaller than the outer diameter of the driving section (222).

5. The locking device with a limiting mechanism according to claim 1, characterized in that: An elastic member (27) is provided between the lifting ball (26) and the top end of the inner cavity of the locking housing (21).

6. A locking device with a limiting mechanism according to claim 1, characterized in that: The locking shell (21) comprises a first shell section (211) and a second shell section (212); the locking hole is arranged on the first shell section (211); the outer diameter of the first shell section (211) is smaller than the outer diameter of the second shell section (212); the first lock body (1) comprises a lock body inner cavity (11); the lock body inner cavity (11) is sleeved on one end of the first shell section (211); a locking boss (12) is arranged on one section of the lock body inner cavity (11); when the locking member (23) extends out of the locking hole, the maximum distance from the outer surface of the locking member (23) to the axis of the locking shell (21) is greater than the inner diameter of the locking boss (12).

7. A locking device with a limiting mechanism according to claim 6, characterized in that: An annular groove is provided on the outer surface of the first housing section (211), a sealing ring (28) is provided in the annular groove, and the inner surface of the locking boss (12) and the outer surface of the first housing section (211) are sealedly connected via the sealing ring (28).

8. The locking device with a limiting mechanism according to claim 6, characterized in that: A first limiting boss (32) and a second limiting boss (33) are respectively provided at both ends of the second lock body through hole (31); the inner diameter of the first limiting boss (32) and the inner diameter of the second limiting boss (33) are both smaller than the outer diameter of the second shell section (212); and there is a gap between the inner surface of the second shell section (212) and the inner surface of the second lock body through hole (31).

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