Locking mechanism, battery structure and electric carrier

Abstract

The invention relates to the technical field of battery pack locking mechanisms, and particularly discloses a locking mechanism, a battery structure and an electric van, the locking mechanism comprises a locking seat, a lock catch, a connecting rod and an elastic piece, the locking seat and the lock catch are arranged on the two symmetrical sides of a box body, the locking seat comprises a seat body and an adapter hinged to the seat body, and the adapter is connected with the locking seat. A locking groove is formed in the lock catch, the first end of the locking rod is connected into a first mounting hole formed in the middle area of the adapter in a clearance fit mode, the second end of the locking rod can be inserted into or separated from the locking groove, and the elastic piece is arranged at the first end of the locking rod in a sleeving mode and used for driving the locking rod to keep the centering state with the first mounting hole. The clearance fit allows the second end of the locking rod to generate lateral displacement in the direction perpendicular to the insertion direction, so that the locking rod can bypass the lock catch to enter or exit from the locking groove, operation of the locking rod is more convenient, the matching precision of the locking rod and components such as the locking groove can be reduced, and the clamping phenomenon caused by size errors is avoided.

Description

Technical Field

[0001] The present invention relates to the technical field of battery pack locking mechanisms, and in particular to a locking mechanism, a battery structure, and an electric transport vehicle. Background Art

[0002] With the rapid development of electric transport vehicles, logistics equipment and other fields, replaceable battery packs have become the mainstream power supply solution due to their convenience and efficiency. In order to ensure stable power supply of the battery pack, it is generally fixed in the box of the vehicle body through a locking mechanism to ensure stability during transportation and reliability of electrical connections.

[0003] In the prior art, common locking mechanisms include bolt locking mechanisms and snap-on locking mechanisms. Among them, the spiral locking mechanism is a detachable connection achieved by bolts, but its installation and disassembly require repeated tightening of the bolts, which is troublesome and time-consuming. The snap-on locking mechanism has high requirements on the processing accuracy and dimensional accuracy of parts, because the locking rod and the lock buckle are rigidly matched. If the errors in dimensional accuracy and processing accuracy are large, the locking rod and the lock buckle are difficult to match, which can easily lead to jamming, wear and even damage to the mechanism. In addition, other mechanisms that use a rotating locking rod lack an effective unlocking state maintenance structure, that is, the operator needs to hold the locking rod with one hand and take the battery pack with the other hand, which is inconvenient to operate. Summary of the Invention

[0004] The present invention is made in consideration of the above-mentioned problems. The purpose of the invention is to provide a locking mechanism, a battery structure and a battery transport cart, which are convenient for unlocking and locking the battery pack, have low requirements for dimensional accuracy, and the locking rod can be elastically locked in the unlocked position, which is easy to operate.

[0005] To achieve the above objectives, the present invention provides a locking mechanism for locking or unlocking a battery pack located in a box, the locking structure comprising: A locking seat, which is installed on the first side of the box body, the locking seat includes a seat body and an adapter, and the first end of the adapter is rotatably connected to the seat body; A lock buckle is fixedly arranged on the second side of the box body and is arranged corresponding to the locking seat, and a locking groove is provided on the lock buckle; a locking rod, a first end of which is connected to a first mounting hole provided in the middle area of ​​the adapter by a clearance fit, and a second end of which is configured to be inserted into or out of the locking groove; an elastic member, which is sleeved on the first end of the locking rod and is used to drive the locking rod to maintain a centering state with the first mounting hole; The clearance fit allows the second end of the locking rod to be laterally displaced perpendicular to the insertion direction, so that the locking rod can bypass the lock catch and enter or exit the locking groove.

[0006] According to the locking mechanism described above, the elastic member is configured as a spring, the locking rod is provided with a limiting plate protruding along its circumference, the spring is sleeved on the first end of the locking rod, and one end of the spring abuts against the limiting plate, and the other end of the spring abuts against the outer side surface of the adapter.

[0007] According to the locking mechanism described above, the opening of the locking groove faces downward.

[0008] According to the locking mechanism described above, the adapter can rotate around a first axis, the locking rod has a first position for locking the battery pack and a second position for unlocking the battery pack, and the locking rod can rotate around the first axis with the adapter to switch between the first position and the second position.

[0009] According to the locking mechanism described above, the locking seat also includes a rubber block, which is fixed on the seat body and located on one side of the first end of the adapter. A cam is provided on the first end of the adapter and is rotatably connected to the seat body through the cam. A protrusion is provided on the cam, which can rotate with the cam and can abut against the rubber block.

[0010] According to the locking mechanism described above, when the locking rod is located at the second position, the protrusion abuts against the rubber block to elastically lock the adapter and the locking rod.

[0011] According to the locking mechanism described above, when the locking rod is in the first position, the locking rod is parallel to the top surface of the battery pack to close the opening of the box body; when the locking rod is in the second position, the locking rod is perpendicular to the top surface of the battery pack to open the opening of the box body.

[0012] According to the locking mechanism described above, a buffer block is provided on a side of the middle area of ​​the adapter close to the box body, and the buffer block is made of elastic material.

[0013] A battery structure comprising: Mutually compatible battery pack and box; The locking mechanism as described above is provided at the opening of the box body and can be used to lock the battery pack in the box body.

[0014] An electric transport vehicle comprising: A vehicle body, the bottom of which is provided with a driving wheel set; The battery structure as described above can be used to provide electrical energy to the driving wheel set.

[0015] The present invention has the following beneficial effects: 1. The first end of the locking lever is loosely fitted into the first mounting hole provided in the middle region of the adapter. This loose fit allows the second end of the locking lever to be laterally displaced perpendicular to the insertion direction, enabling the locking lever to bypass the lock catch itself and enter or exit the locking groove. Furthermore, a spring is used to provide a continuous centering force for the locking lever. Therefore, the operator only needs to overcome the elastic force of the spring to drive the locking lever laterally into or out of the locking groove to achieve locking and unlocking. This simplifies operation and greatly reduces the installation accuracy requirements for the battery pack and the housing, avoiding jamming caused by manufacturing tolerances or deformation. 2. When the locking lever is rotated to the unlocked position, the protrusion on the cam contacts the rubber block, forming a deformation resistance, effectively elastically locking the locking lever, allowing the battery pack to be operated with both hands; 3. A buffer block is added to the second end of the adapter to prevent direct collision between the adapter and the box when the adapter moves from the unlocked position to the locked position along with the locking rod, thereby preventing damage to the adapter and the box; 4. The locking lever is easy to operate and can greatly improve the efficiency of battery pack replacement. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 1 is a schematic diagram of the overall battery structure of an embodiment; Figure 2 is another perspective view of the battery structure of the embodiment; Figure 3 2 is a schematic structural diagram of the locking mechanism of an embodiment; Figure 4 is a schematic diagram of the assembly of the first end of the locking rod and the first mounting hole of the embodiment; Figure 5 2 is a schematic diagram of the structure of the adapter of the embodiment.

[0017] In the picture: 100, locking mechanism; 110, locking seat; 111, seat body; 112, adapter; 112a, first mounting hole; 112b, cam; 112c, buffer block; 112d, latch head; 113, rubber block; 120, lock catch; 121, locking groove; 130, locking rod; 131, limit plate; 140, spring; 200, box; 300. Battery pack; 310. Latch slot. DETAILED DESCRIPTION

[0018] The following are specific embodiments of the present invention and the accompanying drawings to further describe the technical solutions of the present invention, but the present invention is not limited to these embodiments.

[0019] like Figure 1-5As shown, a locking mechanism includes a locking seat 110, a lock buckle 120, a locking rod 130 and an elastic member, which is used to lock or unlock the battery pack 300 located in the box 200. One end of the locking rod 130 is hinged on the locking seat 110, and the locking rod 130 is connected to and separated from the lock buckle 120 by rotation, thereby achieving locking and unlocking of the battery pack 300.

[0020] Specifically, the locking seat 110 is installed on the first side of the box body 200, and the locking seat 110 includes a seat body 111 and an adapter 112. The first end of the adapter 112 is rotatably connected to the seat body 111. The lock buckle 120 is fixedly arranged on the second side of the box body 200 and is correspondingly arranged with the locking seat 110. A locking groove 121 is provided on the lock buckle 120. Both the locking seat 110 and the lock buckle 120 are arranged at the opening of the box body 200, and the locking seat 110 and the lock buckle 120 are respectively arranged on both sides of the box body 200. The first end of the locking rod 130 is connected to the In the first mounting hole 112a set in the middle area of ​​the adapter 112, the second end of the locking rod 130 is configured to be inserted into or disengaged from the locking groove 121, that is, the locking rod 130 is rotated up and down through the adapter 112 to switch its locked and unlocked states. When the second end of the locking rod 130 is inserted into the locking groove 121, the locking rod 130 can lock the battery pack 300. After the second end of the locking rod 130 is disengaged from the locking groove 121, the second end of the locking rod 130 can be rotated upward to move away from the lock buckle 120 and the battery pack 300, thereby unlocking the battery pack 300.

[0021] The locking slot 121 is actuated by a spring which is adapted to engage the first locking member 130 and engage the second locking member 130. The spring is adapted to engage the first locking member 130 and engage the second locking member 130. The spring is adapted to engage the first locking member 130 and engage the second locking member 130. The clearance between the first end of the locking rod 130 and the first mounting hole 112a is matched, which can allow the locking rod 130 to be laterally displaced, thereby bypassing the lock buckle 120. After bypassing, the second end of the locking rod 130 is placed into the locking groove 121. During the lateral displacement, the movement of the locking rod 130 will squeeze the elastic member. When the lateral displacement is completed, the elastic member can be reset together with the driving locking rod 130, thereby keeping the second end of the locking rod 130 always in the locking groove 121 to achieve elastic locking. Since the locking rod 130 and the locking groove 121 do not require high-precision matching, the dimensional accuracy requirements of each component are low, which can avoid the phenomenon of jamming due to dimensional error, and it is easy to operate and has a good locking effect.

[0022] Among them, the elastic member is set as a spring 140, and the locking rod 130 is provided with a limit plate 131 protruding along its circumference. The spring 140 is sleeved on the first end of the locking rod 130, and one end of the spring 140 abuts against the limit plate 131, and the other end of the spring 140 abuts against the outer side surface of the adapter 112, and the spring 140 is used to provide a centering elastic force for the locking rod 130.

[0023] In this embodiment, the first mounting hole 112a is required to correspond to the middle of the locking groove 121, so that when the elastic member drives the locking rod 130 to reset, the first end of the locking rod 130 is in a state of being aligned with the first mounting hole 112a, and the second end of the locking rod 130 is in the middle of the locking groove 121.

[0024] In this embodiment, the cross-sections of the first end of the locking rod 130 and the first mounting hole 112a are both elliptical, and the size of the first mounting hole 112a is larger than the size of the first end of the locking rod 130, that is, the first end of the locking rod 130 can perform multi-directional movement along its circumference relative to the first mounting hole 112a, allowing the locking rod 130 to perform multi-directional movement, and only needs to overcome the elastic force of the elastic member.

[0025] Specifically, the adapter 112 can rotate around the first axis, and the locking rod 130 has a first position for locking the battery pack 300 and a second position for unlocking the battery pack 300. The locking rod 130 can rotate around the first axis with the adapter 112 to switch between the first position and the second position. During operation, the operator can hold the locking rod 130 with his hand, and drive the adapter 112 to rotate around the first axis through the locking rod 130 to realize the lifting and lowering action of the second end of the locking rod 130. When the locking rod 130 moves from the first position to the second position, the locking rod 130 rotates upward, and the second end of the locking rod 130 moves upward to move away from the lock buckle 120 and the battery pack 300. When the locking rod 130 moves from the second position to the first position, the locking rod 130 rotates downward, and the second end of the locking rod 130 moves downward to approach the lock buckle 120 and the battery pack 300.

[0026] Furthermore, when the locking rod 130 is in the first position, the locking rod 130 is parallel to the top surface of the battery pack 300 to close the opening of the box 200. When the locking rod 130 is in the second position, the locking rod 130 is perpendicular to the top surface of the battery pack 300 to open the opening of the box 200. When the opening of the box 200 is opened, the battery pack 300 can be placed in or taken out from the opening of the box 200. After the battery pack 300 is placed in the box 200, the opening of the box 200 can be closed to lock the battery pack 300.

[0027] In this embodiment, the locking seat 110 , the lock catch 120 , and the locking rod 130 are all located inside the box body 200 , which can prevent the locking mechanism 100 from interfering with other components.

[0028] Furthermore, a buffer block 112c is provided on one side of the middle area of ​​the adapter 112 close to the box body 200. The buffer block 112c is made of elastic material. The buffer block 112c can provide a pre-tightening force for the adapter 112, that is, after the adapter 112 cooperates with the locking rod 130 to rotate to the position of locking the battery pack 300, the buffer block 112c can provide a pre-tightening force for the adapter 112, so there will be no loosening, shaking, etc., which increases the reliability of locking the battery pack 300 and does not emit shaking noise.

[0029] Of course, a latch head 112d is provided on the side of the second end of the adapter 112 close to the box body 200, and a latch groove 310 is provided on the side wall of the battery pack 300. When the adapter 112 moves to the locking position with the locking rod 130, the latch head 112d is inserted into the latch groove 310 to limit the horizontal movement of the battery pack 300 and improve its locking stability.

[0030] In this embodiment, the locking groove 121 is opened below the lock buckle 120, that is, the opening of the locking groove 121 is downward. When the second end of the locking rod 130 moves from the unlocking position to the locking position, the second end of the locking rod 130 first moves to the top of the lock buckle 120, then moves sideways, and then continues to move downward to the bottom of the lock buckle 120, and then drives the second end of the locking rod 130 to move sideways and move to just below the locking groove 121. Under the drive of the elastic member, it resets upward and remains in the locking groove 121.

[0031] Among them, positioning plates are provided on both sides of the locking groove 121, and locking planes are provided on both sides of the second end of the locking rod 130. The locking planes can fit with the inner side of the positioning plates to limit the lateral movement of the locking rod 130 and prevent automatic unlocking.

[0032] Of course, in this embodiment, in order to ensure the stability of the lock and prevent the locking rod 130 from falling in the locked state due to the dual action of the adapter 112 and gravity, and to prevent it from being automatically unlocked, a limit block is set on the adapter 112 and the side close to the seat body 111. When the locking rod 130 moves to the first position, the limit block abuts against the seat body 111 to limit the adapter 112 from continuing to rotate in the clockwise direction. Of course, in addition to this method, a torsion spring can also be set at the hinge between the first end of the adapter 112 and the seat body 111. The torsion spring provides a counterclockwise elastic force acting on the adapter 112, which can drive the locking rod 130 to remain in the locked state.

[0033] Furthermore, the locking seat 110 also includes a rubber block 113, which is fixed on the seat body 111 and is located on one side of the first end of the adapter 112. A cam 112b is provided on the first end of the adapter 112, and is rotatably connected to the seat body 111 through the cam 112b. A protrusion is provided on the cam 112b, which can rotate with the cam 112b and can abut against the rubber block 113. When the protrusion abuts against the rubber block 113, the rubber block 113 provides a deformation resistance to the cam 112b, limiting the cam 112b from continuing to rotate, thereby keeping the adapter 112 in this position and keeping the locking rod 130 in the corresponding position. During the installation and removal of the battery pack 300, there is no need to distract the operation of the locking rod 130.

[0034] Furthermore, when the locking rod 130 is in the second position, the protrusion abuts against the rubber block 113 to elastically lock the adapter 112 and the locking rod 130. At this time, the locking rod 130 is in the unlocked state, and the battery pack 300 can be installed and removed. Since there is no need to hold the locking rod 130 by hand, the battery pack 300 can be operated with both hands, which greatly improves the convenience of operation.

[0035] In this embodiment, two locking mechanisms 100 are provided in total. The two locking mechanisms 100 are arranged at intervals in the box body 200 , which can improve the locking stability and prevent the battery pack 300 from shaking.

[0036] In this embodiment, the seat body 111 is detachably fixed to the box body 200 by bolts, which facilitates the disassembly and maintenance of the entire locking seat 110.

[0037] Specifically, a battery structure includes a battery pack 300, a box body 200 and a locking mechanism 100 as described above. The battery pack 300 and the box body 200 are adapted to each other. An opening is provided at the top of the box body 200, and the battery pack 300 can be inserted or removed from the opening. The locking mechanism 100 is provided at the opening of the box body 200 and can be used to lock the battery pack 300 in the box body 200, thereby preventing the battery pack 300 from shaking in the box body 200 and improving the stability of the battery pack 300.

[0038] Specifically, an electric transport truck includes a body and a battery structure. The body is provided with multiple electrical components and a drive wheel group is provided at the bottom. The battery structure is arranged on the front side of the body and is used to supply power to the multiple electrical components and the drive wheel group to achieve electric drive. By replacing the battery pack 300, the power can be quickly replenished, the charging efficiency is improved, and the working time of the transport truck is increased.

[0039] In this embodiment, a locking mechanism 100, a battery structure and an electric transport vehicle are disclosed. The locking mechanism 100 includes a locking seat 110, a lock buckle 120, a connecting rod and an elastic member. The locking seat 110 and the lock buckle 120 are arranged on two symmetrical sides of a box body 200. The locking seat 110 includes a seat body 111 and an adapter 112 hinged on the seat body 111. The lock buckle 120 is provided with a locking groove 121. The first end of the locking rod 130 is connected to the first mounting hole 112a provided in the middle area of ​​the adapter 112 through a clearance fit, and the second end thereof is connected to the first mounting hole 112a provided in the middle area of ​​the adapter 112 through a clearance fit. It is constructed to be able to be inserted into or disengaged from the locking groove 121, and the elastic member is sleeved on the first end of the locking rod 130, used to drive the locking rod 130 to maintain a centered state with the first mounting hole 112a. The clearance fit allows the second end of the locking rod 130 to produce lateral displacement perpendicular to the insertion direction, so that the locking rod 130 can bypass the lock buckle 120 to enter or exit the locking groove 121, making the operation of the locking rod 130 more convenient, and can reduce the matching accuracy of the locking rod 130 and components such as the locking groove 121, avoiding jamming due to dimensional errors.

[0040] The technical solutions of the present invention have been described in detail above with reference to the accompanying drawings, and the embodiments described are intended to facilitate understanding of the concepts of the present invention. The specific embodiments described herein are merely illustrative of the spirit of the present invention. Persons skilled in the art may make various modifications, additions, or substitutions to the described specific embodiments, without departing from the spirit of the present invention or exceeding the scope defined by the appended claims.

[0041] It should be noted that all directional indications (such as up, down, left, right, front, back, etc.) in the embodiments of the present invention are only used to explain the relative position relationship, movement status, etc. between the various components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0042] In addition, in the present invention, descriptions such as "first," "second," and "one" are for descriptive purposes only and should not be understood to indicate or imply their relative importance or implicitly specify the number of the technical features indicated. Therefore, a feature specified as "first" or "second" may explicitly or implicitly include at least one of such features. In the description of the present invention, "plurality" means at least two, such as two, three, etc., unless otherwise specifically defined.

[0043] In the present invention, unless otherwise specified or limited, the terms "connection" and "fixation" should be understood in a broad sense. For example, "fixation" can mean fixed connection, detachable connection, or integration; mechanical connection or electrical connection; direct connection or indirect connection through an intermediate medium; internal communication between two elements or interaction between two elements, unless otherwise specified. Those skilled in the art will be able to understand the specific meanings of the above terms in the present invention based on specific circumstances.

[0044] In addition, the technical solutions between the various embodiments of the present invention can be combined with each other, but it must be based on the fact that ordinary technicians in this field can implement it. When the combination of technical solutions is mutually contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

Claims

1. A locking mechanism for locking or unlocking a battery pack in a box, characterized in that: The locking structure comprises: A locking seat, which is installed on the first side of the box body, the locking seat includes a seat body and an adapter, and the first end of the adapter is rotatably connected to the seat body; A lock buckle is fixedly arranged on the second side of the box body and is arranged corresponding to the locking seat, and a locking groove is provided on the lock buckle; a locking rod, a first end of which is connected to a first mounting hole provided in the middle area of ​​the adapter by a clearance fit, and a second end of which is configured to be inserted into or out of the locking groove; an elastic member, which is sleeved on the first end of the locking rod and is used to drive the locking rod to maintain a centering state with the first mounting hole; The clearance fit allows the second end of the locking rod to be laterally displaced perpendicular to the insertion direction, so that the locking rod can bypass the lock catch and enter or exit the locking groove.

2. A locking mechanism according to claim 1, characterized in that: The elastic member is configured as a spring, and the locking rod is provided with a limiting plate protruding along its circumference. The spring is sleeved on the first end of the locking rod, and one end of the spring abuts against the limiting plate, and the other end of the spring abuts against the outer side surface of the adapter.

3. A locking mechanism according to claim 1 or 2, characterized in that: The opening of the locking groove faces downward.

4. The locking mechanism according to claim 1, wherein: The adapter can rotate around a first axis, and the locking lever has a first position for locking the battery pack and a second position for unlocking the battery pack. The locking lever can rotate around the first axis with the adapter to switch between the first position and the second position.

5. A locking mechanism according to claim 4, characterized in that: The locking seat also includes a rubber block, which is fixed on the seat body and located on one side of the first end of the adapter. A cam is provided on the first end of the adapter and is rotatably connected to the seat body through the cam. A protrusion is provided on the cam, which can rotate with the cam and abut against the rubber block.

6. A locking mechanism according to claim 5, characterized in that: When the locking rod is located at the second position, the protrusion abuts against the rubber block to elastically lock the adapter and the locking rod.

7. The locking mechanism according to claim 4, characterized in that: When the locking lever is in the first position, the locking lever is parallel to the top surface of the battery pack to close the opening of the box body. When the locking lever is in the second position, the locking lever is perpendicular to the top surface of the battery pack to open the opening of the box body.

8. The locking mechanism according to claim 1, wherein: A buffer block is provided on one side of the middle area of ​​the adapter close to the box body, and the buffer block is made of elastic material.

9. A battery structure, characterized in that: include: Mutually compatible battery pack and box; The locking mechanism according to any one of claims 1 to 8 is arranged at the opening of the box and can be used to lock the battery pack in the box.

10. An electric transport vehicle, characterized in that: include: A vehicle body, the bottom of which is provided with a driving wheel set; A battery structure as claimed in claim 9, wherein the battery structure can be used to provide electrical energy to the driving wheel set.

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