Battery locking mechanism suitable for battery replacement of chassis of electric vehicle

Abstract

A battery locking mechanism suitable for battery replacement of a chassis of an electric vehicle comprises a locking shaft and further comprises at least one push rod used for fixing the locking shaft, each push rod is connected with a driving mechanism used for driving the push rod to move, and each driving mechanism comprises an outer shell penetrated by the corresponding push rod. A power-on type electromagnetic chuck and a power-off type electromagnetic chuck are arranged in the outer shell, and a first disc capable of being attracted by the power-on type electromagnetic chuck and a second disc capable of being attracted by the power-off type electromagnetic chuck are fixedly arranged on the portion, in the outer shell, of the push rod in a sleeving mode; the end, close to the locking shaft, of the push rod is sleeved with a clamp used for abutting against the locking shaft. The driving mechanism composed of the electromagnetic chuck is adopted to control the push rod to fix the locking shaft, locking and unlocking of a chassis battery can be achieved through vehicle end control, rapid battery replacement of a power battery pack can be achieved in a battery replacement station, the power battery pack can be rapidly assembled and disassembled in a maintenance station, locking and unlocking devices do not need to be additionally arranged on an RGV platform of the battery replacement station, and the cost is reduced. The equipment cost of the swap station is reduced.

Description

Technical Field

[0001] The utility model relates to the field of battery replacement of electric vehicles, in particular to a battery locking mechanism suitable for battery replacement of an electric vehicle chassis. Background Art

[0002] The existing battery pack installation methods of electric vehicles are generally divided into fixed and replaceable types. Fixed battery packs can only be charged, while replaceable battery packs can be charged or replaced. The replacement method is more suitable for some electric vehicles that are in continuous operation.

[0003] Replaceable battery pack technology, also known as "battery swap technology", allows low-power battery packs on electric vehicles to be quickly replaced with fully charged battery packs at battery swap stations to meet the efficient operation of electric vehicles. The locking mechanism of the bottom-mounted battery pack of the vast majority of electric vehicles on the market that use battery swap technology is controlled by the battery swap station, requiring the battery swap station to be equipped with unlocking devices, which increases the cost of the battery swap station equipment. If the power battery pack of an electric vehicle using these locking mechanisms needs to be repaired, it is difficult to unload the power battery pack without a battery swap station, and the time is long, resulting in high maintenance costs. Utility Model Content

[0004] In order to solve the above technical problems, the utility model adopts the following technical solutions:

[0005] A battery locking mechanism suitable for battery replacement in an electric vehicle chassis comprises a locking shaft and at least one push rod for fixing the locking shaft, each push rod is respectively connected to a driving mechanism for driving the push rod to move, the driving mechanism comprises an outer shell, the push rod passes through the outer shell, an energized electromagnetic suction cup and a de-energized electromagnetic suction cup are arranged in the outer shell, the push rod and a partial fixed sleeve in the outer shell are provided with a first disc which can be adsorbed by the energized electromagnetic suction cup and a second disc which can be adsorbed by the de-energized electromagnetic suction cup; a clamp for fixing the push rod and supporting the locking shaft is sleeved on one end of the push rod close to the locking shaft.

[0006] Furthermore, a first locking block and a second locking block are arranged at intervals from top to bottom on the top of the locking shaft, and a locking groove for being held by a clamp is formed between the first locking block and the second locking block.

[0007] Furthermore, the clamp comprises a pressing block, and a first limiting groove and a second limiting groove matching the first locking block and the second locking block are provided on a side of the pressing block facing the locking shaft to form a double-layer stop.

[0008] Furthermore, the cross-section of the end of the push rod close to the locking shaft is D-shaped, and the pressure block is provided with a through hole for the push rod to pass through, and the shape of the through hole is D-shaped that matches the end of the push rod, and the pressure block is provided with a fixing bolt for fixing the clamp to the push rod.

[0009] Furthermore, a fixed plate is provided at the bottom of the driving mechanism, and the pressing block is provided with a rolling assembly for supporting and assisting the movement of the clamp, the rolling assembly includes a screw rod passing through both sides of the pressing block, and includes two bearings rotatably mounted on the screw rod through a round nut and a stop washer, and the bearings are arranged on both sides of the pressing block.

[0010] Furthermore, the driving mechanism also includes a controller, and the controller is connected to the energized electromagnetic chuck and the de-energized electromagnetic chuck respectively through the control harness, and the controller also controls the oil unlocking position sensor and the locking position sensor respectively through the control harness.

[0011] Furthermore, a first end cover and a second end cover are respectively provided on both sides of the outer shell, the first end cover is close to the locking shaft, the second end cover is far away from the locking shaft, and the push rod passes through the first end cover and the second end cover.

[0012] Furthermore, a spring is sleeved on one end of the push rod close to the locking shaft, one end of the spring is supported by the first end cover, and the other end of the spring is supported by the clamp.

[0013] Furthermore, a limiting nut is provided on one end of the push rod passing through the second end cover, and when the push rod is driven to move in the direction of the locking axis, the second end cover can be supported to limit the push rod.

[0014] Compared with the prior art, the beneficial effects of the present invention are:

[0015] 1. The utility model adopts a driving mechanism composed of an electromagnetic suction cup to drive the push rod to move the locking shaft to lock and limit the position. The chassis battery can be locked and unlocked through vehicle-side control. In the battery swap station, the power battery pack can be quickly replaced. In the maintenance station, the power battery pack can be quickly loaded and unloaded. There is no need to add locking and unlocking devices to the RGV platform of the battery swap station, thereby reducing the equipment cost of the battery swap station.

[0016] 2. The driving mechanism of the utility model adopts an energized electromagnetic suction cup and a de-energized electromagnetic suction cup to adsorb and fix the first disk and the second disk sleeved on the push rod when the power is on and the power is off, respectively, to form a primary limiting device. At the same time, a limiting nut is provided at the end of the push rod away from the locking shaft as a secondary limiting device, which can support the end cover of the driving mechanism, so that the moving distance of the push rod is fixed and the locking is more firm and reliable.

[0017] 3. When the utility model is not powered on, the power-off type electromagnetic suction cup generates magnetic force to attract the second disc, controls the push rod to move toward the locking shaft, and drives the clamp to hold and fix the locking shaft; when the power is on, the power-on type electromagnetic suction cup generates magnetic force to attract the first disc, controls the push rod to move away from the locking shaft, and drives the clamp to release the locking shaft; therefore, there is no need to power on in a long-term locked state, and only a short power-on is required during the unlocking process, which is easy to operate and energy-saving and environmentally friendly.

[0018] 4. The first limit groove and the second limit groove matching the outer shape of the locking shaft are provided on the side of the pressure block of the clamp of the utility model facing the locking shaft, forming a double-layer stop form, thereby improving the reliability of the locking mechanism.

[0019] 5. The clamp of the utility model is provided with a rolling assembly on the pressing block, which can not only assist the push rod to extend and fix the locking shaft, but also share part of the bearing weight for the clamp. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a structural schematic diagram of the utility model.

[0021] Figure 2 It is an exploded schematic diagram of the driving mechanism of the utility model.

[0022] Figure 3 This is a schematic diagram of the locked state of the utility model.

[0023] Figure 4 This is a schematic diagram of the unlocking state of the utility model.

[0024] Figure 5 It is a structural schematic diagram of the clamp of the utility model.

[0025] Figure 6 It is a structural schematic diagram of the locking shaft of the utility model.

[0026] Figure 7 It is a structural schematic diagram of the driving mechanism of the utility model.

[0027] Among them, the numbers in the figure are:

[0028] The locking shaft 10, the first locking block 11, the second locking block 12, the locking groove 13,

[0029] The driving mechanism 20, the energized electromagnetic chuck 21, the de-energized electromagnetic chuck 22, the first disc 23, the second disc 24, the outer shell 25, and the first end cover 26,

[0030] Controller 30, unlocking position sensor 31, locking position sensor 32, control harness 33,

[0031] Push rod 40, spring 41, limit nut 42,

[0032] The clamp 50, the pressing block 51, the through hole 52, the fixing bolt 53, the first limiting groove 54, the second limiting groove 55, the rolling assembly 56, the bearing 561, the stop washer 562, the round nut 563, the screw 564, and the fixing plate 60. DETAILED DESCRIPTION

[0033] The specific implementation of the present utility model is described below with reference to the accompanying drawings.

[0034] In the description of the present invention, it should be noted that if there are terms indicating orientation or positional relationship such as "upper", "lower", "inner", "middle", etc., they are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, if there are terms such as "first", "second", etc., they are only used for descriptive purposes and cannot be understood as indicating or implying relative importance.

[0035] Reference Figure 1 , Figure 3 and Figure 4 A battery locking mechanism suitable for battery replacement in an electric vehicle chassis includes a locking shaft 10, and at least one push rod 40 for fixing the locking shaft 10 and a driving mechanism 20 for driving the push rod 40 to move, wherein the driving mechanism 20 is disposed on a fixed plate 60. In this embodiment, two driving mechanisms 20 are preferably used to respectively drive the push rod 40 to fix the locking shaft 10. The push rod 40 runs through the entire driving mechanism 20, and a clamp 50 is sleeved on one end of the push rod 40 close to the locking shaft 10 to fix the position of the push rod 40. When the vehicle end sends an unlocking signal, the driving mechanism 20 controls the push rod 40 to move away from the locking shaft 10; when the vehicle end sends a locking signal, the driving mechanism 20 controls the push rod 40 to move toward the locking shaft 10 until the clamp 50 holds and fixes the locking shaft 10.

[0036] Reference Figure 1 , Figure 2 and Figure 7The driving mechanism 20 includes an outer shell 25 and a first end cover 26 and a second end cover (not shown in the figure) arranged on both sides of the outer shell 25. The first end cover 26 is arranged at one end close to the locking shaft 10, and the second end cover is arranged at one end away from the locking shaft 10. The push rod 40 passes through the first end cover 26 and the second end cover. The outer shell 25 is provided with an energized electromagnetic suction cup 21 and a de-energized electromagnetic suction cup 22. The part of the push rod 40 in the outer shell 25 is fixedly sleeved with a first disc 23 and a second disc 24. When the driving mechanism 20 is powered on, the energized electromagnetic suction cup 21 generates magnetic force, the first disc 23 is attracted by the energized electromagnetic suction cup 21, and the push rod 40 is driven to move in the direction away from the locking shaft 10; when the driving mechanism 20 is not powered on, the de-energized electromagnetic suction cup 22 generates magnetic force, the second disc 24 is attracted by the de-energized electromagnetic suction cup 22, and the push rod 40 is driven to move in the direction of the locking shaft 10.

[0037] Reference Figure 2 and Figure 7 The driving mechanism 20 further includes a controller 30, which is connected to the energized electromagnetic chuck 21 and the de-energized electromagnetic chuck 22 through a control harness 33. Specifically, the control harness 33 of this embodiment integrates an electromagnetic chuck power line, an electromagnetic chuck bottom line, a position sensor power line, a position sensor bottom line, and a position sensor signal line, so that the controller 30 can control the energized electromagnetic chuck 21 and the de-energized electromagnetic chuck 22 to generate magnetic force in different states. The controller 30 is also connected to an unlocking position sensor 31 and a locking position sensor 32 through the control harness 33, and can cooperate with the controller 30, the energized electromagnetic chuck 21, and the de-energized electromagnetic chuck 22 to output locking and unlocking signals respectively.

[0038] Reference Figure 2 , Figure 3 and Figure 5 The end of the push rod 40 close to the locking shaft 10 is sleeved with a clamp 50, which can limit the position of the push rod 40 and hold the locking shaft 10. The push rod 40 is also sleeved with a spring 41, one end of the spring 41 holds the clamp 50, and the other end holds the first end cover 26 of the driving mechanism 20. A limit nut 42 is sleeved on the end of the push rod 40 away from the locking shaft 10. When the push rod 40 is driven by the first disc 23 to move toward the locking shaft 10, the first disc 23 and the second disc 24 fixed on the push rod 40 form a primary limit device, so that the displacement of the push rod is uniquely fixed. The limit nut 42 holds the second end cover, as a secondary limit device, and plays a limiting role on the push rod 40.

[0039] Reference Figure 1 , Figure 4 and Figure 6The locking shaft 10 is provided with a first locking block 11 and a second locking block 12 arranged at intervals from top to bottom, and a locking groove 13 for being held by a clamp is formed between the first locking block 11 and the second locking block 12. Preferably, the first locking block 11 in this embodiment is in the shape of an inverted truncated cone.

[0040] Reference Figure 3 , Figure 4 and Figure 5 The clamp 50 includes a pressing block 51, which is provided with a through hole 52 for the push rod 40 to pass through, and the shape of the through hole 52 matches the shape of one end of the push rod 40 close to the locking shaft 10. A fixing bolt 53 is provided above the pressing block 51, which can be used to lock the pressing block 51 on the push rod 40. The pressing block 51 is provided with a first limiting groove 54 and a second limiting groove 55 on the side facing the locking shaft 10, which respectively correspond to the first locking block 11 and the second locking block 12 of the locking shaft 10 to form a double-layer stop. When the push rod 40 moves toward the locking shaft 10 under the drive of the driving mechanism 20, the clamp 50 is driven to hold the locking shaft 10, and the first locking block 11 and the second locking block 12 are respectively correspondingly inserted into the first limiting groove 54 and the second limiting groove 55, and the pressing block 51 is held in the locking groove 13 of the locking shaft 10 to fix the locking shaft 10.

[0041] Reference Figure 5 , Figure 3 and Figure 4 A rolling assembly 56 for assisting the movement of the clamp 50 is provided on the pressing block 51, and the rolling assembly 56 includes a screw rod 564 passing through both sides of the pressing block 51, and also includes two bearings 561 rotatably fixed on the screw rod 564 through a round nut 563 and a stop washer 562, and the two bearings 561 are arranged on both sides of the pressing block 51; when the push rod 40 moves under the control of the driving mechanism 20, the clamp 50 moves with the push rod 40, and the rolling assembly 56 rolls on the fixed plate 60 under the driving mechanism 20, which not only assists the movement of the clamp 50, but also shares part of the load-bearing capacity of the clamp 50.

[0042] Reference Figure 1-Figure 7Specifically, when the vehicle end sends an unlocking signal, the drive mechanism 20 is powered on, the controller 30 obtains a voltage of 24V, and the energized electromagnetic suction cup 21 connected by the control harness 33 is energized to generate magnetic force, and the de-energized electromagnetic suction cup 22 has no magnetic force. The first disc 23 is adsorbed by the energized electromagnetic suction cup 21, driving the push rod 40 and the clamp 50 to move away from the locking shaft 10, the spring 41 is compressed, and the clamp 50 leaves the locking shaft 10 with the assistance of the rolling assembly 56, and the unlocking position sensor 31 outputs an unlocking in place signal; when the vehicle end sends an unlocking signal, the drive mechanism 20 is powered on, and the controller 30 obtains a voltage of 24V, and the energized electromagnetic suction cup 21 connected by the control harness 33 is energized to generate magnetic force, and the de-energized electromagnetic suction cup 22 has no magnetic force. The first disc 23 is adsorbed by the energized electromagnetic suction cup 21, driving the push rod 40 and the clamp 50 to move away from the locking shaft 10, the spring 41 is compressed, and the clamp 50 leaves the locking shaft 10 with the assistance of the rolling assembly 56, and the unlocking position sensor 31 outputs an unlocking in place signal. Locking signal, the drive mechanism 20 is not powered, the controller 30 loses the 24V power supply, the energized electromagnetic suction cup 21 has no magnetic force, and the de-energized electromagnetic suction cup 22 has magnetic force, attracting the second disc 24, and the second disc 24 drives the push rod 40 to move toward the locking shaft 10, the spring 41 resets, the clamp 50 on the push rod 40 is inserted into the locking groove 13, the first locking block 11 and the second locking block 12 are stuck in the first limit groove 54 and the second limit groove 55, the locking mechanism locks the locking shaft 10, and the locking position sensor 32 outputs a locked in place signal.

[0043] The above is only a specific implementation method of the utility model, but the design concept of the utility model is not limited to this. Any non-substantial changes to the utility model using this concept shall be deemed as an infringement of the protection scope of the utility model.

Claims

1. A battery locking mechanism suitable for battery replacement in an electric vehicle chassis, comprising a locking shaft and at least one push rod for fixing the locking shaft, each push rod being respectively connected to a driving mechanism for driving the push rod to move, characterized in that: The driving mechanism includes an outer shell, the push rod passes through the outer shell, and the outer shell is provided with an energized electromagnetic suction cup and a de-energized electromagnetic suction cup. The part of the push rod fixed inside the outer shell is provided with a first disk that can be adsorbed by the energized electromagnetic suction cup and a second disk that can be adsorbed by the de-energized electromagnetic suction cup; a clamp for fixing the push rod and supporting the locking shaft is provided on one end of the push rod close to the locking shaft.

2. A battery locking mechanism suitable for chassis battery replacement in electric vehicles according to claim 1, characterized in that: A first locking block and a second locking block are arranged at intervals from top to bottom on the top of the locking shaft, and a locking groove for being held by a clamp is formed between the first locking block and the second locking block.

3. A battery locking mechanism suitable for chassis battery replacement in electric vehicles according to claim 2, characterized in that: The clamp includes a pressure block, and a first limiting groove and a second limiting groove matching the shapes of the first locking block and the second locking block are provided on one side of the pressure block facing the locking shaft, and the first limiting groove and the second limiting groove form a double-layer stop.

4. A battery locking mechanism suitable for chassis battery replacement in electric vehicles according to claim 3, characterized in that: The cross-section of the end of the push rod close to the locking shaft is D-shaped, and the pressure block is provided with a through hole for the push rod to pass through. The shape of the through hole is D-shaped that matches the end of the push rod, and the pressure block is provided with a fixing bolt for fixing the clamp to the push rod.

5. The battery locking mechanism suitable for chassis battery replacement of electric vehicles according to claim 3 is characterized in that: A fixed plate is provided at the bottom of the driving mechanism, and the pressing block is provided with a rolling assembly for supporting and assisting the movement of the clamp. The rolling assembly includes a screw rod passing through both sides of the pressing block, and also includes two bearings rotatably fixed on the screw rod by a round nut and a stop washer. The bearings are arranged on both sides of the pressing block.

6. A battery locking mechanism suitable for chassis battery replacement in electric vehicles according to claim 1, characterized in that: The driving mechanism also includes a controller, which is connected to the energized electromagnetic chuck and the de-energized electromagnetic chuck respectively through a control harness, and the controller is also connected to an unlocking position sensor and a locking position sensor through a control harness.

7. A battery locking mechanism suitable for chassis battery replacement in electric vehicles according to claim 1, characterized in that: A first end cover and a second end cover are respectively disposed on both sides of the outer shell, the first end cover is close to the locking shaft, the second end cover is far away from the locking shaft, and the push rod passes through the first end cover and the second end cover.

8. A battery locking mechanism suitable for battery replacement in an electric vehicle chassis according to claim 7, characterized in that: A spring is sleeved on one end of the push rod close to the locking shaft, one end of the spring is supported by the first end cover, and the other end of the spring is supported by the clamp.

9. A battery locking mechanism suitable for chassis battery replacement in electric vehicles according to claim 7, characterized in that: A limiting nut is arranged on one end of the push rod passing through the second end cover.

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