CN113910968A

CN113910968A - Locking mechanism, lock assembly, quick-change bracket assembly and electric vehicle for battery pack

Info

Publication number: CN113910968A
Application number: CN202111302056.9A
Authority: CN
Inventors: 黄春华; 兰志波
Original assignee: Aulton New Energy Automotive Technology Co Ltd; Shanghai Dianba New Energy Technology Co Ltd
Current assignee: Aulton New Energy Automotive Technology Co Ltd; Shanghai Dianba New Energy Technology Co Ltd
Priority date: 2017-12-29
Filing date: 2017-12-29
Publication date: 2022-01-11
Anticipated expiration: 2037-12-29
Also published as: CN113910969B; CN113910969A; CN114084031B; CN109986991A; CN114084031A; CN113910968B; CN113954616A; CN109986991B

Abstract

The invention discloses a locking mechanism, a lock assembly, a quick-change bracket assembly and an electric vehicle for a battery pack. The locking mechanism includes: the lock base is provided with an opening and a cavity, and the opening is used for allowing the lock shaft to enter the cavity; the lock bolt can rotate relative to the lock base to change between an unlocking state and a locking state, the bolt expansion part of the lock bolt is positioned outside the lock base, and when the lock bolt is in the locking state, the bolt body of the lock bolt can prevent the lock shaft from leaving the cavity from the opening; and the reset component is provided with a first spring part, a second spring part and a middle spiral part, wherein the first spring part and the second spring part can rotate around the middle spiral part, are arranged on the lock base and act on the lock tongue, can generate elastic deformation, and are used for enabling the lock tongue to rotate along a locking direction so as to reset from an unlocking state to a locking state. Locking mechanism can provide second grade locking or locking protect function for the battery package, is used for preventing that the battery package from dropping when current device locking is invalid, improves the security performance.

Description

Locking mechanism, lock assembly, quick-change bracket assembly and electric vehicle for battery pack

The application is a divisional application of patent applications with application dates 2017, 12 and 29, application number 201711478874.8 and entitled "locking mechanism for battery pack, lock assembly, quick-change bracket assembly and electric vehicle".

Technical Field

The invention relates to a locking mechanism, a lock assembly, a quick-change bracket assembly and an electric vehicle for a battery pack.

Background

The conventional battery pack mounting methods for electric vehicles are generally classified into a fixed type and a replaceable type, wherein the fixed type battery pack is generally fixed on an automobile, and the automobile is directly used as a charging object during charging. The replaceable battery pack is generally movably mounted, and the battery pack can be taken down at any time and replaced by a new battery pack.

Locking and unlocking of the battery pack is involved in the process of replacing a new battery pack. Generally, lock shafts are installed on the left and right sides of the battery pack; the locking device is fixed on the quick-change bracket to assemble a quick-change bracket assembly, and the quick-change bracket assembly is further installed on a chassis of the electric vehicle; the locking shaft is matched with the locking device to realize the locking of the battery pack. And current locking means only contains one-level locking, lacks the locking protection, and in case break down, the locking is invalid, and the battery package has probably dropped, brings very big potential safety hazard.

Disclosure of Invention

The invention aims to overcome the defects in the prior art and provides a locking mechanism, a lock assembly, a quick-change bracket assembly and an electric vehicle for a battery pack.

The invention solves the technical problems through the following technical scheme:

a locking mechanism for a battery pack, the locking mechanism comprising:

the lock base is provided with an opening and a cavity extending from the opening, and the opening is used for allowing a lock shaft mounted on the battery pack to enter the cavity;

the bolt comprises a bolt body and a bolt expansion part which are fixedly connected, the bolt expansion part is positioned outside the lock base, and when the bolt is in the locking state, the bolt body can prevent the lock shaft from leaving the cavity from the opening; and

the reset component is arranged on the lock base and acts on the lock tongue, the reset component can elastically deform, the reset component is used for enabling the lock tongue to rotate in a locking direction to reset from the unlocking state to the locking state, the reset component is provided with a first spring part, a second spring part and a middle spiral part, the first spring part is connected with the lock base, the second spring part is connected with the lock tongue, the first spring part, the middle spiral part and the second spring part are sequentially connected, the first spring part and the second spring part can rotate around the middle spiral part, and the lock tongue is provided with an arc part which is matched with the middle spiral part.

Preferably, the lock base is provided with a first spring hole, and the first spring part is embedded in the first spring hole; the spring bolt is provided with a second spring hole, and the second spring part is embedded in the second spring hole.

Preferably, the arc forms a receiving groove, the intermediate spiral portion being located within the receiving groove.

Preferably, the opening of the receiving recess faces the lock base.

Preferably, the lock base has a first limiting surface, the first limiting surface is an outer wall surface of the lock base, the bolt expansion portion has a second limiting surface, and when the bolt is in the locking state, the first limiting surface abuts against the second limiting surface to prevent the bolt from continuing to rotate along the locking direction.

By adopting the arrangement, when the lock tongue rotates to the contact of the first limiting surface and the second limiting surface, the lock tongue does not rotate any more and stops in a locking state.

Preferably, the bolt extension portion includes a bending portion, and when the bolt is in a locked state, the bending portion is located on a side surface of the lock base.

Preferably, the bending portion extends from the second limiting surface to the bottom of the lock base to form a protrusion.

Preferably, a gap is formed between the bending part and the side surface of the lock base.

Preferably, when the lock tongue is in the locked state, the end of the bent portion is lower than the top of the lock base, and/or the end of the bent portion is higher than the bottom of the lock base.

Preferably, the top of the lock base is provided with a recess communicating with the cavity, the bolt extending through the recess.

By adopting the arrangement, the arrangement of the bolt expansion part is convenient.

Preferably, the locking mechanism further comprises a centering shaft, the centering shaft is arranged on the lock base and penetrates through the bolt body, and the bolt body can rotate around the centering shaft.

Preferably, the locking mechanism further comprises an elastic component, the elastic component is at least partially positioned in the cavity, and the elastic component is used for abutting against the lock shaft;

the elastic component comprises an elastic pad which is positioned in the cavity and is used for abutting against the lock shaft;

the elastic component further comprises an elastic handle part and an elastic head part, the elastic pad, the elastic handle part and the elastic head part are sequentially connected, the elastic handle part penetrates through the lock base, and the wall part of the lock base is clamped between the elastic pad and the elastic head part.

With the above arrangement, the elastic member prevents the lock shaft from rigidly impacting the lock base, and the entire elastic member can be stably mounted on the lock base.

Preferably, the opening is a bell mouth.

By adopting the arrangement, the lock shaft can conveniently enter the cavity.

A lock assembly, comprising:

the locking mechanism as described above;

the unlocking mechanism acts on the bolt expansion part to enable the bolt to rotate in an unlocking direction to change from the locking state to the unlocking state, and the unlocking direction is opposite to the locking direction.

Preferably, the unlocking mechanism includes two limiting portions, the two limiting portions define an accommodating space for accommodating the lock base, and one of the two limiting portions acts on the bolt expanding portion to rotate the bolt in the unlocking direction to change from the locked state to the unlocked state.

The quick-change bracket component comprises a quick-change bracket and the locking mechanism, wherein the locking mechanism is fixedly arranged on the quick-change bracket.

Preferably, the quick-change bracket assembly further comprises a primary locking mechanism, the primary locking mechanism comprises a lock connecting rod, at least one primary lock tongue and at least one primary lock base, the primary lock base is fixedly arranged on the quick-change bracket, the primary lock base is provided with a primary opening and a primary cavity extending from the primary opening, the primary opening is used for allowing a primary lock shaft arranged on the battery pack to enter the primary cavity, the lock connecting rod is rotatably connected with at least one primary lock tongue, is used for driving the first-stage lock tongue to rotate under the action of external force, so that the first-stage lock tongue can rotate relative to the first-stage lock base to change between a first-stage unlocking state and a first-stage locking state, when the first-stage spring bolt is in the first-stage locking state, the first-stage spring bolt can prevent the first-stage lock shaft from leaving the first-stage cavity from the first-stage opening.

Preferably, the primary locking mechanism and the locking mechanism are arranged on the same side of the quick-change bracket.

Preferably, the quick-change bracket assembly further comprises a plurality of supporting devices, and the supporting devices are arranged on one side of the quick-change bracket facing the battery pack and used for providing a plurality of supporting points for supporting the battery pack.

Preferably, the supporting device is provided with a supporting groove, and the lower surface of the supporting groove, the lower surface of the cavity and the lower surface of the primary cavity are located on the same plane.

An electric motor car, its includes battery package and as above quick change bracket component, the battery package install in quick change bracket component, install in the lock axle of battery package is located in the cavity.

Preferably, the electric vehicle further comprises a chassis, and the quick-change bracket assembly is fixed on the chassis.

On the basis of the common knowledge in the field, the above preferred conditions can be combined randomly to obtain the preferred embodiments of the invention.

The positive progress effects of the invention are as follows: according to the locking mechanism, the lock assembly, the quick-change bracket assembly and the electric vehicle for the battery pack, the reset part is arranged, so that the lock tongue can be conveniently reset to the locking state from the unlocking state, the battery pack is convenient to mount and lock, and the lock tongue cannot be easily changed to the unlocking state under the action of the reset part, so that the locking is more reliable; the lock bolt expansion part positioned outside the lock base is arranged, so that the lock bolt body can rotate through acting on the lock bolt expansion part, and the unlocking is convenient; locking mechanism can provide second grade locking or locking protect function for the battery package, is used for preventing that the battery package from dropping when current device locking is invalid, improves the security performance. The first spring portion and the second spring portion are each rotatable about the intermediate helical portion to effect a change in the spring force of the return member.

Drawings

Fig. 1 is a perspective view schematically showing a lock mechanism according to embodiment 1 of the present invention.

Fig. 2 is a front view schematically showing a lock mechanism according to embodiment 1 of the present invention.

Fig. 3 is a schematic plan view of a lock mechanism according to embodiment 1 of the present invention.

Fig. 4 is a schematic cross-sectional view of a lock mechanism according to embodiment 1 of the present invention.

Fig. 5 is a schematic cross-sectional view of a lock base according to embodiment 1 of the present invention.

Fig. 6 is a perspective view of the locking tongue of embodiment 1 of the present invention.

Fig. 7a to 7e show a lock shaft mounting process of embodiment 1 of the present invention.

Fig. 8 is a perspective view of the lock mechanism of embodiment 2 of the present invention at an angle.

Fig. 9 is a perspective view showing the restoring member at the same angle as fig. 8.

Fig. 10 is a perspective view of the locking mechanism of embodiment 2 of the present invention at another angle.

Fig. 11 is a rear view schematically showing a lock mechanism according to embodiment 2 of the present invention.

Fig. 12 is a perspective view schematically illustrating a lock mechanism according to embodiment 3 of the present invention.

Fig. 13 is a schematic cross-sectional view of a lock mechanism according to embodiment 3 of the present invention.

Fig. 14 is a perspective view of a lock mechanism according to embodiment 4 of the present invention.

Fig. 15 is a schematic cross-sectional view of a lock mechanism according to embodiment 4 of the present invention.

Fig. 16 is a perspective view of a lock assembly of embodiment 5 of the present invention.

Fig. 17 is a partial schematic view of a quick-change holder assembly according to embodiment 6 of the present invention.

Fig. 18 is another partial schematic view of the quick-change holder assembly of embodiment 6 of the invention, partially overlapping fig. 17.

Description of reference numerals:

100: locking mechanism

110: lock base

111: opening of the container

112: hollow cavity

113: a first limit surface

114: a first concave part

115: groove

116: centering hole

117: locating hole

118: mounting hole

119: first spring hole

120: lock tongue

121: lock tongue body

122: bolt extension

1221: a bent part

123: second limit surface

124: second projecting part

125: second spring hole

126: accommodating groove

130: reset component

131: first spring part

132: second spring part

133: middle spiral part

140: centering shaft

150: locating pin

160: elastic component

161: elastic cushion

162: elastic handle

163: elastic head

200: lock shaft

300: unlocking mechanism

310: limiting part

320: accommodation space

40: quick-change bracket assembly

400: one-level locking mechanism

410: first-level lock base

411: primary opening

412: primary cavity

420: one-level lock tongue

430: lock connecting rod

500: supporting device

600: quick-change bracket

Detailed Description

The invention is further illustrated by the following examples, which are not intended to limit the scope of the invention.

Example 1

As shown in fig. 1 to 4, the present embodiment discloses a locking mechanism 100 for a battery pack. The locking mechanism 100 includes: lock base 110, locking bolt 120, and reset device 130. As shown in fig. 5-6 and fig. 7a-7e, the lock base 110 has an opening 111 and a cavity 112 extending from the opening 111, and the opening 111 is used for allowing the lock shaft 200 mounted on the battery pack to enter the cavity 112. The locking bolt 120 is rotatable relative to the lock base 110 to change between an unlocked state and a locked state. The latch bolt 120 includes a latch bolt body 121 and a latch bolt expansion part 122, which are fixedly connected, the latch bolt expansion part 122 is located outside the lock base 110, and when the latch bolt 120 is in a locked state, the latch bolt body 121 can prevent the lock shaft 200 from leaving the cavity 112 from the opening 111. The reset member 130 is provided on the lock base 110, the reset member 130 acts on the latch tongue 120, the reset member 130 is elastically deformable, and the reset member 130 is configured to rotate the latch tongue 120 in a locking direction to reset from an unlocked state to a locked state.

The reset component 130 is arranged to facilitate the reset of the lock tongue 120 from the unlocked state to the locked state, so that the battery pack is convenient to mount and lock, and under the action of the reset component 130, the lock tongue 120 cannot be easily changed into the unlocked state, so that the lock is more reliable; the bolt expansion part 122 arranged outside the lock base 110 can realize the rotation of the bolt body 121 through acting on the bolt expansion part 122, so that the unlocking is convenient; the locking mechanism 100 can provide a secondary locking or locking protection function for the battery pack, and is used for preventing the battery pack from falling off when the locking of the existing device fails, so that the safety performance is improved.

As shown in fig. 7a, the latch bolt expanding portion 122 includes a bent portion 1221, and the bent portion 1221 is located at a side of the lock base 110 when the latch bolt 120 is in the locked state. The bending part 1221 is used for cooperating with the unlocking mechanism, and the bending part 1221 is arranged on the side surface of the lock base 110, so that mutual interference between the bending part 1221 and the lock base 110 in the unlocking process can be reduced, and the unlocking reliability is improved.

Further, as shown in fig. 7a, the bent portion 1221 has a gap with the side surface of the lock base 110. Since the latch tongue 120 rotates relative to the lock base 110, that is, the bent portion 1221 rotates relative to the lock base 110, a gap is provided between the bent portion 1221 and a side surface of the lock base 110, on one hand, a sufficient rotation space is provided for the bent portion 1221, and the bent portion 1221 is prevented from being blocked by the lock base 110 during the rotation process and being unable to be switched to the unlocking position. Another convenience, also prevent that kink 1221 from producing the friction with the side of lock base 110, guarantee the smoothness nature of kink 1221 rotation, improve the life of kink 1221 and lock base 110.

As shown in fig. 7a, in the present embodiment, when the latch tongue 120 is in the locked state, the end of the bent portion 1221 is lower than the top of the lock base 110, and the end of the bent portion 1221 is higher than the bottom of the lock base 110. The end of the bent portion 1221 refers to a lower end of the bent portion 1221, that is, an end close to the bottom of the lock base 110. In the process that the locking mechanism 100 is switched from the locking state to the unlocking state, the locking tongue 120 rotates towards the top of the lock base 110, and the end part of the locking tongue bending part 1221 is lower than the top of the lock base 110, so that the rotation angle of the locking tongue 120 can be increased, the situation that the locking tongue 120 rotates for a certain time under the condition of being touched by mistake and the like is avoided, the unlocking of the battery pack is caused, and the reliability of locking the battery pack is improved. The end of the bent portion 1221 is higher than the bottom of the lock base 110, so that the possibility that the latch 120 is accidentally touched to rotate can be reduced, and the reliability of locking the battery pack can be further improved.

The bent portion 1221 in this embodiment also satisfies that the end of the bent portion 1221 is lower than the top of the lock base 110, and the end of the bent portion 1221 is higher than the bottom of the lock base 110. In other alternative embodiments, the provision of the bent portion 1221 satisfying one of the above-described two requirements also enables improvement of reliability of locking of the battery pack, that is, the end of the bent portion 1221 is lower than the top of the lock base 110 or the end of the bent portion 1221 is higher than the bottom of the lock base 110.

As shown in fig. 7a, the end surface of the bent portion 1221 has a curved surface. Specifically, the lower end face of the bending portion 1221 is a downward convex arc surface, and the structure can reduce stress applied when the bending portion 1221 is matched with an unlocking mechanism, reduce damage and prolong service life.

The opening 111 is a bell mouth. Facilitating entry of lock shaft 200 into cavity 112.

In this embodiment, the lock base 110 has a first position-limiting surface 113 (marked in fig. 5), and the first position-limiting surface 113 is an outer wall surface of the lock base 110. Specifically the upper outer wall surface of the lock base 110. The tongue extension 122 has a second stop surface 123 (shown in fig. 6). The second limiting surface 123 is specifically a lower outer surface of the locking tongue 120. As shown in fig. 7a, the bending portion 1221 extends from the second position-limiting surface 123 to protrude toward the bottom of the lock base 110. As shown in fig. 7a or 7e, when the locking tongue 120 is in the locking state, the first limiting surface 113 abuts against the second limiting surface 123 to prevent the locking tongue 120 from rotating continuously in the locking direction. In fig. 7a-7e, the locking direction is clockwise. When the latch bolt 120 rotates in the locking direction until the first limiting surface 113 contacts the second limiting surface 123, the latch bolt 120 stops rotating and stops in the locking state. In alternative embodiments, other parts of the lock base may contact other parts of the locking tongue to prevent the locking tongue from rotating further.

As shown in FIG. 5, the top of the lock base 110 is provided with a recess 115, and the recess 115 is in communication with the cavity 112. Referring to fig. 4, the latch tongue 120 extends through the groove 115. Facilitating the placement of the deadbolt extension 122.

As shown in fig. 1 to 5, the locking mechanism 100 further includes a centering shaft 140, the centering shaft 140 is disposed on the lock base 110, the centering shaft 140 is disposed through the bolt body 121, and the bolt body 121 can rotate around the centering shaft 140. Specifically, the centering shaft 140 is disposed through the centering hole 116 of the lock base 110. Meanwhile, the lock base 110 is provided with a positioning hole 117, and the locking mechanism 100 further includes a positioning pin 150, a portion of the positioning pin 150 is located outside the positioning hole 117, and the positioning pin 150 is in interference fit with the positioning hole 117. The locating pin 150 may be used for locating when the locking mechanism 100 is mounted to a quick-change holder. In this embodiment, the centering shaft 140 is also in interference fit with the centering hole 116, and is also partially located outside the lock base 110 to play a positioning role. In addition, the lock base 110 is provided with a mounting hole 118, and the mounting hole 118 is a screw hole. Threaded fasteners may be passed through the mounting holes 118 to mount the locking mechanism 100 to the quick-change holder.

The locking mechanism 100 further includes a resilient member 160. Referring to fig. 4, the resilient member 160 is at least partially positioned within the cavity 112, the resilient member 160 for abutting the lock shaft 200. Specifically, the elastic member 160 includes an elastic pad 161, the elastic pad 161 is located in the cavity 112, and the elastic pad 161 is used for abutting against the lock shaft 200. The elastic member 160 prevents the lock shaft 200 from rigidly colliding with the lock base 110. The resilient member 160 further includes a resilient stem 162 and a resilient head 163. The elastic pad 161, the elastic handle 162 and the elastic head 163 are connected in sequence, the elastic handle 162 is inserted into the lock base 110, and the wall of the lock base 110 is clamped between the elastic pad 161 and the elastic head 163. So that the entire elastic member 160 can be stably mounted to the lock base 110. The elastic member 160 is preferably made of rubber.

Next, the restoring member 130 of the present embodiment will be described in detail with reference to fig. 1 to 6:

the restoring member 130 includes a first spring portion 131 and a second spring portion 132. The first spring portion 131 is connected to the lock base 110, and the second spring portion 132 is connected to the latch bolt 120. In this embodiment, the restoring member 130 is a compression spring. The first spring portion 131 and the second spring portion 132 are both ends of the compression spring. The compression spring has the advantages of convenient processing and low cost.

The lock base 110 is provided with a first recess 114, and the first spring 131 is located in the first recess 114; the latch tongue 120 is provided with a second protrusion 124, and the second spring 132 is sleeved on the second protrusion 124. Both ends of the compression spring can be reliably connected with the lock base 110 and the latch tongue 120 to prevent the ejection. In an alternative embodiment, this may be: the lock base is provided with a first protruding part, the first spring part is sleeved on the first protruding part, the lock tongue is provided with a second protruding part, and the second spring part is sleeved on the second protruding part; or the lock base is provided with a first protruding part, the first spring part is sleeved on the first protruding part, the lock tongue is provided with a second recessed part, and the second spring part is positioned in the second recessed part; or the lock base is provided with a first sunken part, and the first spring part is positioned in the first sunken part; the spring bolt is provided with a second sunken part, and the second spring part is positioned in the second sunken part; can achieve similar effect.

Fig. 7a to 7e show the mounting process of the lock shaft 200 of embodiment 1 of the present invention. In fig. 7a, the bolt 120 is in the locked state, but the lock shaft 200 has not yet entered the cavity 112. In fig. 7c, the deadbolt 120 is in or near the unlocked state and the lock shaft 200 has partially entered the cavity 112. In fig. 7e, the deadbolt 120 is in the locked state and the lock shaft 200 is fully seated in the cavity 112, the lock shaft 200 being mounted in place.

The following description describes the operation of the locking mechanism 100 in conjunction with the accompanying drawings:

a locking process (i.e., the installation process of fig. 7a to 7e, the latch 120 changes from the locked state to the unlocked state to the locked state): from fig. 7a to 7c, the lock shaft 200 moves upward under the action of external force, enters the cavity 112 through the opening 111, and the lock shaft 200 acts on the bolt body 121 to rotate the bolt 120 in the counterclockwise direction; the latch tongue 120 acts on the second spring part 132 of the restoring member 130, so that the elastic force of the restoring member 130 is changed; fig. 7c to 7e show that after the latch 120 rotates to a certain angle, a channel for the lock shaft 200 to pass through is formed in the cavity 112, and the lock shaft 200 can move from left to right; until the lock shaft 200 is no longer in contact with the latch body 121, the latch 120 rotates clockwise under the action of the reset member 130, and is reset to the locked state.

An unlocking process: applying an upward force to deadbolt extension 122, causing deadbolt 120 to rotate in a counterclockwise direction; the latch tongue 120 acts on the second spring part 132 of the restoring member 130, so that the elastic force of the restoring member 130 is changed; after the latch bolt 120 rotates to a certain angle, a channel for the lock shaft 200 to pass through is formed in the cavity 112; the lock shaft 200 can move from right to left and then down through the opening 111, leaving the locking mechanism 100.

Example 2

As shown in fig. 8 to 11, the lock mechanism 100 of the present embodiment is similar to that of embodiment 1 except for the structure of the returning member 130 and the mounting position of the returning member 130; meanwhile, the structure of the latch bolt 120 is modified accordingly, and the reset component 130 is avoided.

In this embodiment, the restoring member 130 is a torsion spring. The restoring member 130 further includes an intermediate coil portion 133, and the first spring portion 131, the intermediate coil portion 133, and the second spring portion 132 are connected in this order. Each of the first and

second spring portions

131 and 132 is rotatable about the intermediate spiral portion 133 to effect a change in spring force. The lock base 110 has a first spring hole 119, and the first spring portion 131 is inserted into the first spring hole 119. The latch tongue 120 is provided with a second spring hole 125, and the second spring portion 132 is embedded in the second spring hole 125.

The latch tongue 120 is provided with an arc-shaped portion to match the middle spiral portion 133.

The return is achieved by the torsion spring, and the first and

second spring portions

131 and 132 of the torsion spring can be reliably connected to the lock base 110 and the latch tongue 120, preventing the ejection.

As shown in fig. 10, the arc-shaped portion forms the receiving groove 126, and the intermediate spiral portion 133 is partially located in the receiving groove 126. Specifically, the middle spiral part 133 is disposed on the first limiting surface 113 of the lock base 110, the tongue extending part 122 of the tongue 120 is located above the middle spiral part 133, the receiving groove 126 is disposed at the lower end of the tongue extending part 122, and the opening of the receiving groove 126 faces the lock base 110, that is, the opening of the receiving groove 126 faces downward.

Because the middle spiral part 133 of the reset component 130 is located on the first limit surface 113, the second limit surface 123 of the lock tongue 120 needs to be abutted against the first limit surface 113, and therefore the accommodating groove 126 for accommodating the middle spiral part 133 is formed in the arc-shaped part, so that the lock tongue 120 and the reset component 130 can be prevented from interfering, namely, the second limit surface 123 can be abutted against the first limit surface 113 to realize locking, the lock tongue 120 is prevented from extruding the middle spiral part 133, and the service life of the reset component 130 is prolonged.

Example 3

The lock mechanism 100 of the present embodiment is similar to that of embodiment 1, except for the structure of the returning member 130 and the mounting position of the returning member 130.

As shown in fig. 12-13, the return member 130 is a bending spring, which is formed of a spring plate. In this embodiment, the first spring portion 131 abuts against at least two non-overlapping inner wall surfaces of the lock base 110, and the second spring portion 132 abuts against the tongue 120. In an alternative embodiment, the first spring portion may abut only one inner wall surface of the lock base, although it is conceivable that the effect is not as good as abutting at least two non-overlapping inner wall surfaces.

As shown in fig. 13, the first spring portion 131 is an L-shaped spring portion, and the second spring portion 132 is an arc-shaped spring portion, and is connected to a U-shaped spring portion through a flat spring portion.

The return is achieved by the bending spring, and the first spring portion 131 and the second spring portion 132 of the bending spring can be reliably connected to the lock base 110 and the latch tongue 120, thereby preventing the latch from being ejected.

Example 4

As shown in fig. 14 to 15, the locking mechanism 100 of the present embodiment is similar to that of embodiment 3, and the restoring member 130 is still a bending spring, and the difference is only that: in the present embodiment, the restoring member 130 is constituted by a spring wire.

In an alternative embodiment, the shape of the meander spring may be substantially similar to embodiment 3 or embodiment 4, but the meander spring may be formed partly of spring leaves and partly of wire, with the same effect being achieved. In alternative embodiments, the shape of the meander springs may be different from that shown in the figures, and may take the form of any meander spring capable of the desired deformation.

Example 5

The embodiment discloses a lock subassembly, quick change bracket component and electric motor car.

As shown in fig. 16, the lock assembly includes: the locking mechanism 100 and the unlocking mechanism 300 shown in embodiment 1. The unlocking mechanism 300 acts on the latch bolt extension 122 to rotate the latch bolt 120 in an unlocking direction to change from the locked state to the unlocked state. The unlocking direction is opposite to the locking direction, and the unlocking direction is anticlockwise.

Specifically, the unlocking mechanism 300 includes two position limiting portions 310, the two position limiting portions 310 define an accommodating space 320 for accommodating the lock base 110, and one of the two position limiting portions 310 acts on the bolt expanding portion 122 to rotate the bolt 120 in the unlocking direction to change from the locked state to the unlocked state. In the process of adapting the unlocking mechanism 300 and the locking mechanism 100, one limiting part 310 can act on the bolt expanding part 122 to realize unlocking, and the whole process is rapid and efficient; it is not necessary to unlock the lock mechanism 100 after the unlocking mechanism 300 is fitted to the lock mechanism 100 by means of other parts or by other actions.

As shown in fig. 16, the limiting portion 210 of the unlocking mechanism 300 acts on the bent portion 1221 and pushes the bent portion 1221 to move upward, so as to drive the lock tongue to switch to the unlocking state.

The quick-change bracket assembly includes a quick-change bracket (not shown) and the locking mechanism 100 described in embodiment 1. Locking mechanism 100 is fixed and is located the quick change support. The quick-change holder is generally a frame-shaped structure, and the locking mechanism 100 is fixed in the frame of the frame-shaped structure. The quick-change bracket may also be a plate-like structure, and the locking mechanism 100 may be fixed to a lower surface of the plate-like structure. Generally, a locking mechanism 100 is disposed on each of the left and right sides of the quick-change bracket. In the quick-change bracket assembly, the locking mechanism 100 can be used as a secondary lock to be used together with a primary lock; the primary lock may refer to a "locking device" disclosed in chinese patent application publication No. CN 106427514A.

The electric vehicle includes a battery pack (not shown), a quick-change cradle assembly, and a chassis (not shown). The battery pack is mounted to the quick-change bracket assembly, and the lock shaft 200 mounted to the battery pack is located in the cavity 112. The quick-change bracket component is fixed on the chassis.

In other embodiments, the lock assembly, the quick-change bracket assembly and the locking mechanism 100 in the electric vehicle according to embodiment 1 can be replaced by the locking mechanism 100 in embodiments 2, 3 or 4.

Example 6

As shown in fig. 17 and 18, the present embodiment discloses a quick-change holder assembly 40.

The quick-change holder assembly 40 includes a quick-change holder 600, the locking mechanism 100 (as a secondary locking mechanism) described in embodiment 1, and a primary locking mechanism 400. The locking mechanism 100 is fixedly arranged on the quick-change bracket 600. The primary locking mechanism 400 includes a lock link 430, at least one primary locking tongue 420, and at least one primary lock base 410. The primary lock base 410 is fixedly disposed on the quick-change holder 600. In this embodiment, two sides of the quick-change bracket 600 are respectively provided with 3 first-stage lock bases 410 and 3 first-stage locking tongues 420. Fig. 17 and 18 are partial schematic views of one side thereof.

The primary lock base 410 is provided with a primary opening 411 and a primary cavity 412 extending from the primary opening 411, and the primary opening 411 is used for allowing a primary lock shaft (the structure of which is the same as or similar to the lock shaft 200) installed on the battery pack to enter the primary cavity 412. The lock link 430 is rotatably connected to at least one first-stage latch tongue 420, and is configured to drive the first-stage latch tongue 420 to rotate under an external force, so that the first-stage latch tongue 420 can rotate relative to the first-stage lock base 410 to change between a first-stage unlocked state and a first-stage locked state. When the first-stage latch tongue 420 is in the first-stage locking state, the first-stage latch tongue 420 can prevent the first-stage lock shaft from leaving the first-stage cavity 412 from the first-stage opening 411. The "primary lock state" refers to a state in which the primary lock mechanism 400 is locked; the "primary unlocked state" refers to an unlocked state of the primary locking mechanism 400.

The primary locking mechanism 400 and the locking mechanism 100 are arranged on the same side of the quick-change bracket 600. The side surface provided with the primary locking mechanism 400 is also provided with the locking mechanism 100; if both sides are provided with primary locking mechanisms 400, then both sides are also provided with locking mechanisms 100. In this embodiment, the first-stage locking mechanism 400 and the locking mechanism 100 are disposed on two inner sides of the quick-change bracket 600, i.e., two inner sides facing the battery pack.

Furthermore, the quick-change rack assembly 40 further comprises a plurality of support means 500, the support means 500 being provided on a side of the quick-change rack 600 facing the battery pack for providing a plurality of support points for supporting the battery pack. The supporting device 500 is also located on the same side as the primary locking mechanism 400 and the locking mechanism 100. Fig. 17 and 18 illustrate the primary locking mechanism 400 in registration, and fig. 17 and 18 illustrate the support device 500 in a different position.

In this embodiment, the support device 500 is similar to the lock base 110, and has no locking function, and serves only as a support platform for the battery pack. In other embodiments, other similar support mechanisms having a support platform may be suitable. The number of the supporting means 500 may be adjusted according to the weight of the actual battery pack, preferably to an average weight of not more than 25KG per supporting means 500.

The support device 500 is provided with a support groove, and the lower surface of the support groove is positioned on the same plane with the lower surface of the cavity 112 and the lower surface of the primary cavity 412. The lower surfaces of the supporting grooves, the cavity 112 and the primary cavity 412 are all surfaces close to the ground when in use, and bear the supporting function of the special locking shaft for supporting the battery pack, the locking shaft 200 and the primary locking shaft, and the battery pack can stably move due to the fact that the lower surfaces of the supporting grooves, the cavity 112 and the primary cavity 412 are located on the same plane.

The primary locking mechanism 400 is substantially synchronized with the unlocking and locking processes of the locking mechanism 100.

While specific embodiments of the invention have been described above, it will be appreciated by those skilled in the art that this is by way of example only, and that the scope of the invention is defined by the appended claims. Various changes and modifications to these embodiments may be made by those skilled in the art without departing from the spirit and scope of the invention, and these changes and modifications are within the scope of the invention.

Claims

1. A locking mechanism for a battery pack, said locking mechanism comprising:

2. The lock mechanism of claim 1, wherein the lock base is provided with a first spring hole, and the first spring portion is fitted in the first spring hole; the spring bolt is provided with a second spring hole, and the second spring part is embedded in the second spring hole.

3. The latch mechanism of claim 1 wherein said arcuate portion defines a receiving recess, said intermediate helical portion being located within said receiving recess.

4. The latch mechanism of claim 3 wherein said receiving recess opens toward said lock base.

5. The lock-out mechanism of claim 1, wherein the lock base has a first limiting surface, the first limiting surface is an outer wall surface of the lock base, the bolt extension portion has a second limiting surface, and when the bolt is in the lock-out state, the first limiting surface abuts against the second limiting surface to prevent the bolt from continuing to rotate in the lock-out direction.

6. The latch mechanism of claim 5, wherein the extended portion of the latch bolt includes a bent portion that is located on a side of the lock base when the latch bolt is in the latched state.

7. The lock-out mechanism of claim 6, wherein the bent portion extends from the second limiting surface toward the bottom of the lock base.

8. The locking mechanism of claim 6, wherein the bend is spaced from the sides of the lock base.

9. The latch mechanism of claim 6, wherein the end of the bend is lower than the top of the lock base and/or the end of the bend is higher than the bottom of the lock base when the latch bolt is in the latched state.

10. The latch mechanism of claim 1, wherein the top of the lock base defines a recess, the recess communicating with the cavity, the locking bolt extending through the recess.

11. The latch mechanism of claim 1, further comprising a centering shaft disposed on the lock base and extending through the bolt body, the bolt body being rotatable about the centering shaft.

12. The locking mechanism of claim 1, further comprising a resilient member at least partially disposed within the cavity, the resilient member configured to abut the lock shaft;

13. The latch mechanism of any of claims 1-12 wherein the opening is a flare.

14. A lock assembly, comprising:

the locking mechanism of any one of claims 1-13;

15. The lock assembly of claim 14, wherein the unlocking mechanism includes two position limiting portions defining an accommodating space for accommodating the lock base, one of the position limiting portions acting on the bolt extension portion to cause the bolt to rotate in the unlocking direction to change from the locked state to the unlocked state.

16. A quick-change holder assembly, characterized in that it comprises a quick-change holder and a locking mechanism according to any one of claims 1-13, which is fixedly arranged to the quick-change holder.

17. The quick-change bracket assembly of claim 16, further comprising a primary locking mechanism, the first-stage locking mechanism comprises a lock connecting rod, at least one first-stage lock tongue and at least one first-stage lock base, the primary lock base is fixedly arranged on the quick-change bracket, the primary lock base is provided with a primary opening and a primary cavity extending from the primary opening, the primary opening is used for allowing a primary lock shaft arranged on the battery pack to enter the primary cavity, the lock connecting rod is rotatably connected with at least one primary lock tongue, is used for driving the first-stage lock tongue to rotate under the action of external force, so that the first-stage lock tongue can rotate relative to the first-stage lock base to change between a first-stage unlocking state and a first-stage locking state, when the first-stage spring bolt is in the first-stage locking state, the first-stage spring bolt can prevent the first-stage lock shaft from leaving the first-stage cavity from the first-stage opening.

18. The quick-change bracket assembly of claim 17, wherein the primary locking mechanism and the locking mechanism are disposed on the same side of the quick-change bracket.

19. The quick-change bracket assembly according to claim 17, further comprising a plurality of support means provided on a side of the quick-change bracket facing the battery pack for providing a plurality of support points for supporting the battery pack.

20. The quick-change bracket assembly according to claim 19, wherein the support means is provided with a support slot having a lower surface that is coplanar with the lower surface of the cavity and the lower surface of the primary cavity.

21. An electric vehicle comprising a battery pack and a quick-change bracket assembly according to any one of claims 16-20, the battery pack being mounted to the quick-change bracket assembly with a latch shaft mounted to the battery pack located in the cavity.

22. The electric vehicle of claim 21, further comprising a chassis, wherein the quick-change bracket assembly is secured to the chassis.